feat: update the datasets new

go.mod

@@ -94,11 +94,12 @@ require (
 	github.com/tecbot/gorocksdb v0.0.0-20181010114359-8752a9433481 // indirect
 	github.com/tinylib/msgp v1.1.2 // indirect
 	github.com/tstranex/u2f v1.0.0
+	github.com/unknwon/bra v0.0.0-20200517080246-1e3013ecaff8 // indirect
 	github.com/unknwon/cae v1.0.0
 	github.com/unknwon/com v1.0.1
 	github.com/unknwon/i18n v0.0.0-20190805065654-5c6446a380b6
 	github.com/unknwon/paginater v0.0.0-20151104151617-7748a72e0141
-	github.com/urfave/cli v1.20.0
+	github.com/urfave/cli v1.22.1
 	github.com/xanzy/go-gitlab v0.31.0
 	github.com/yohcop/openid-go v1.0.0
 	github.com/yuin/goldmark v1.1.27

go.sum

@@ -132,7 +132,10 @@ github.com/couchbase/vellum v1.0.1 h1:qrj9ohvZedvc51S5KzPfJ6P6z0Vqzv7Lx7k3mVc2WO
 github.com/couchbase/vellum v1.0.1/go.mod h1:FcwrEivFpNi24R3jLOs3n+fs5RnuQnQqCLBJ1uAg1W4=
 github.com/couchbaselabs/go-couchbase v0.0.0-20190708161019-23e7ca2ce2b7 h1:1XjEY/gnjQ+AfXef2U6dxCquhiRzkEpxZuWqs+QxTL8=
 github.com/couchbaselabs/go-couchbase v0.0.0-20190708161019-23e7ca2ce2b7/go.mod h1:mby/05p8HE5yHEAKiIH/555NoblMs7PtW6NrYshDruc=
+github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/cupcake/rdb v0.0.0-20161107195141-43ba34106c76/go.mod h1:vYwsqCOLxGiisLwp9rITslkFNpZD5rz43tf41QFkTWY=
 github.com/cznic/b v0.0.0-20181122101859-a26611c4d92d h1:SwD98825d6bdB+pEuTxWOXiSjBrHdOl/UVp75eI7JT8=
@@ -556,12 +559,16 @@ github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001/go.mod h1:qq
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/russross/blackfriday v1.5.2 h1:HyvC0ARfnZBqnXwABFeSZHpKvJHJJfPz81GNueLj0oo=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/satori/go.uuid v1.2.0 h1:0uYX9dsZ2yD7q2RtLRtPSdGDWzjeM3TbMJP9utgA0ww=
 github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
 github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
 github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
 github.com/shurcooL/httpfs v0.0.0-20190527155220-6a4d4a70508b h1:4kg1wyftSKxLtnPAvcRWakIPpokB9w780/KwrNLnfPA=
 github.com/shurcooL/httpfs v0.0.0-20190527155220-6a4d4a70508b/go.mod h1:ZY1cvUeJuFPAdZ/B6v7RHavJWZn2YPVFQ1OSXhCGOkg=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/shurcooL/vfsgen v0.0.0-20181202132449-6a9ea43bcacd h1:ug7PpSOB5RBPK1Kg6qskGBoP3Vnj/aNYFTznWvlkGo0=
 github.com/shurcooL/vfsgen v0.0.0-20181202132449-6a9ea43bcacd/go.mod h1:TrYk7fJVaAttu97ZZKrO9UbRa8izdowaMIZcxYMbVaw=
 github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726/go.mod h1:3yhqj7WBBfRhbBlzyOC3gUxftwsU0u8gqevxwIHQpMw=
@@ -626,6 +633,8 @@ github.com/tstranex/u2f v1.0.0 h1:HhJkSzDDlVSVIVt7pDJwCHQj67k7A5EeBgPmeD+pVsQ=
 github.com/tstranex/u2f v1.0.0/go.mod h1:eahSLaqAS0zsIEv80+vXT7WanXs7MQQDg3j3wGBSayo=
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
+github.com/unknwon/bra v0.0.0-20200517080246-1e3013ecaff8 h1:aVGB3YnaS/JNfOW3tiHIlmNmTDg618va+eT0mVomgyI=
+github.com/unknwon/bra v0.0.0-20200517080246-1e3013ecaff8/go.mod h1:fVle4kNr08ydeohzYafr20oZzbAkhQT39gKK/pFQ5M4=
 github.com/unknwon/cae v1.0.0 h1:i39lOFaBXZxhGjQOy/RNbi8uzettCs6OQxpR0xXohGU=
 github.com/unknwon/cae v1.0.0/go.mod h1:QaSeRctcea9fK6piJpAMCCPKxzJ01+xFcr2k1m3WRPU=
 github.com/unknwon/com v0.0.0-20190804042917-757f69c95f3e h1:GSGeB9EAKY2spCABz6xOX5DbxZEXolK+nBSvmsQwRjM=
@@ -634,10 +643,14 @@ github.com/unknwon/com v1.0.1 h1:3d1LTxD+Lnf3soQiD4Cp/0BRB+Rsa/+RTvz8GMMzIXs=
 github.com/unknwon/com v1.0.1/go.mod h1:tOOxU81rwgoCLoOVVPHb6T/wt8HZygqH5id+GNnlCXM=
 github.com/unknwon/i18n v0.0.0-20190805065654-5c6446a380b6 h1:sRrkJEHtNoaSvyXMbRgofEOX4/3gMiraevQKJdIBhYE=
 github.com/unknwon/i18n v0.0.0-20190805065654-5c6446a380b6/go.mod h1:+5rDk6sDGpl3azws3O+f+GpFSyN9GVr0K8cvQLQM2ZQ=
+github.com/unknwon/log v0.0.0-20150304194804-e617c87089d3 h1:4EYQaWAatQokdji3zqZloVIW/Ke1RQjYw2zHULyrHJg=
+github.com/unknwon/log v0.0.0-20150304194804-e617c87089d3/go.mod h1:1xEUf2abjfP92w2GZTV+GgaRxXErwRXcClbUwrNJffU=
 github.com/unknwon/paginater v0.0.0-20151104151617-7748a72e0141 h1:Z79lyIznnziKADUf0J7EP8Z4ZL7YJDiPuaazlfUBSy4=
 github.com/unknwon/paginater v0.0.0-20151104151617-7748a72e0141/go.mod h1:TBwoao3Q4Eb/cp+dHbXDfRTrZSsj/k7kLr2j1oWRWC0=
 github.com/urfave/cli v1.20.0 h1:fDqGv3UG/4jbVl/QkFwEdddtEDjh/5Ov6X+0B/3bPaw=
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
+github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY=
+github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/willf/bitset v1.1.10 h1:NotGKqX0KwQ72NUzqrjZq5ipPNDQex9lo3WpaS8L2sc=
 github.com/willf/bitset v1.1.10/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
 github.com/xanzy/go-gitlab v0.31.0 h1:+nHztQuCXGSMluKe5Q9IRaPdz6tO8O0gMkQ0vqGpiBk=
@@ -771,6 +784,7 @@ golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190907184412-d223b2b6db03/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47 h1:/XfQ9z7ib8eEJX2hdgFTZJ/ntt0swNk5oYBziWeTCvY=
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191020152052-9984515f0562/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 h1:uYVVQ9WP/Ds2ROhcaGPeIdVq0RIXVLwsHlnvJ+cT1So=
@@ -868,6 +882,8 @@ gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8X
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/fsnotify/fsnotify.v1 v1.4.7 h1:XNNYLJHt73EyYiCZi6+xjupS9CpvmiDgjPTAjrBlQbo=
+gopkg.in/fsnotify/fsnotify.v1 v1.4.7/go.mod h1:Fyux9zXlo4rWoMSIzpn9fDAYjalPqJ/K1qJ27s+7ltE=
 gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df h1:n7WqCuqOuCbNr617RXOY0AWRXxgwEyPp2z+p0+hgMuE=
 gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
 gopkg.in/ini.v1 v1.42.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=

options/locale/locale_en-US.ini

@@ -1,7 +1,7 @@
 home = Home
 dashboard = Dashboard
 explore = Explore
-data_sets = Data Sets
+datasets = Datasets
 help = Help
 sign_in = Sign In
 sign_in_with = Sign In With
@@ -49,6 +49,7 @@ organization = Organization
 mirror = Mirror
 new_repo = New Repository
 new_migrate = New Migration
+new_dataset = New Dataset
 new_mirror = New Mirror
 new_fork = New Repository Fork
 new_org = New Organization
@@ -618,6 +619,13 @@ email_notifications.onmention = Only Email on Mention
 email_notifications.disable = Disable Email Notifications
 email_notifications.submit = Set Email Preference
 
+[dataset]
+title = Title
+description = Description
+create_dataset = Create Dataset
+category = Category
+file = Dataset File
+
 [repo]
 owner = Owner
 repo_name = Repository Name
@@ -667,7 +675,7 @@ pick_reaction = Pick your reaction
 reactions_more = and %d more
 unit_disabled = The site administrator has disabled this repository section.
 language_other = Other
-data_sets = Data Sets
+datasets = Datasets
 
 template.items = Template Items
 template.git_content = Git Content (Default Branch)

options/locale/locale_zh-CN.ini

@@ -47,6 +47,7 @@ repository=仓库
 organization=组织
 mirror=镜像
 new_repo=创建仓库
+new_dataset=创建数据集
 new_migrate=迁移外部仓库
 new_mirror=创建新的镜像
 new_fork=新的仓库Fork
@@ -514,8 +515,8 @@ last_used=上次使用在
 no_activity=没有最近活动
 can_read_info=读取
 can_write_info=写入
-key_state_desc=7 天内使用过该密钥 
-token_state_desc=7 天内使用过该密钥 
+key_state_desc=7 天内使用过该密钥
+token_state_desc=7 天内使用过该密钥
 show_openid=在个人信息上显示
 hide_openid=在个人信息上隐藏
 ssh_disabled=SSH 被禁用
@@ -616,6 +617,13 @@ email_notifications.onmention=只在被提到时邮件通知
 email_notifications.disable=停用邮件通知
 email_notifications.submit=邮件通知设置
 
+[dataset]
+title = 主题
+description = 描述
+create_dataset = 创建数据集
+category = 分类
+file = 数据集文件
+
 [repo]
 owner=拥有者
 repo_name=仓库名称
@@ -662,9 +670,10 @@ watchers=关注者
 stargazers=称赞者
 forks=派生仓库
 pick_reaction=选择你的表情
-reactions_more=再加载 %d 
+reactions_more=再加载 %d
 unit_disabled=站点管理员已禁用此仓库单元。
 language_other=其它
+datasets=数据集
 
 template.items=模板选项
 template.git_content=Git数据(默认分支)

routers/dataset/dataset.go

@@ -7,16 +7,18 @@ import (
 )
 
 const (
-	tplDataSet base.TplName = "dataset/index"
+	tplDataSet base.TplName = "datasets/index"
+	tplCreate  base.TplName = "datasets/create"
 )
 
 func MyList(ctx *context.Context) {
 	log.Debug("[dataset] mylist...\n")
 	ctx.HTML(200, tplDataSet)
-
 }
+
 func Create(ctx *context.Context) {
 	log.Debug("[dataset] Create...\n")
+	ctx.HTML(200, tplCreate)
 }
 func Delete(ctx *context.Context) {
 	log.Debug("[dataset] Delete...\n")

routers/routes/routes.go

@@ -1001,9 +1001,9 @@ func RegisterRoutes(m *macaron.Macaron) {
 	// ***** END: Repository *****
 
 	// DataSet
-	m.Group("/dataset", func() {
+	m.Group("/datasets", func() {
 		m.Get("", dataset.MyList)
-		m.Post("", dataset.Create)
+		m.Get("/create", dataset.Create)
 		m.Post("/delete", dataset.Delete)
 	}, ignSignIn)
 	// ***** END: DataSet*****

templates/base/head_navbar.tmpl

@@ -10,6 +10,7 @@
 
 	{{if .IsSigned}}
 		<a class="item {{if .PageIsDashboard}}active{{end}}" href="{{AppSubUrl}}/">{{.i18n.Tr "dashboard"}}</a>
+		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/datasets">{{.i18n.Tr "datasets"}}</a>
 		{{if not .UnitIssuesGlobalDisabled}}
 		<a class="item {{if .PageIsIssues}}active{{end}}" href="{{AppSubUrl}}/issues">{{.i18n.Tr "issues"}}</a>
 		{{end}}
@@ -20,17 +21,16 @@
 		{{if .ShowMilestonesDashboardPage}}<a class="item {{if .PageIsMilestonesDashboard}}active{{end}}" href="{{AppSubUrl}}/milestones">{{.i18n.Tr "milestones"}}</a>{{end}}
 		{{end}}
 		<a class="item {{if .PageIsExplore}}active{{end}}" href="{{AppSubUrl}}/explore/repos">{{.i18n.Tr "explore"}}</a>
-		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/explore/repos">{{.i18n.Tr "data_sets"}}</a>
 	{{else if .IsLandingPageHome}}
 		<a class="item {{if .PageIsHome}}active{{end}}" href="{{AppSubUrl}}/">{{.i18n.Tr "home"}}</a>
+		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/datasets">{{.i18n.Tr "datasets"}}</a>
 		<a class="item {{if .PageIsExplore}}active{{end}}" href="{{AppSubUrl}}/explore/repos">{{.i18n.Tr "explore"}}</a>
-		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/explore/repos">{{.i18n.Tr "data_sets"}}</a>
 	{{else if .IsLandingPageExplore}}
 		<a class="item {{if .PageIsExplore}}active{{end}}" href="{{AppSubUrl}}/explore/repos">{{.i18n.Tr "home"}}</a>
-		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/explore/repos">{{.i18n.Tr "data_sets"}}</a>
+		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/datasets">{{.i18n.Tr "datasets"}}</a>
 	{{else if .IsLandingPageOrganizations}}
 		<a class="item {{if .PageIsExplore}}active{{end}}" href="{{AppSubUrl}}/explore/organizations">{{.i18n.Tr "home"}}</a>
-		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/explore/repos">{{.i18n.Tr "data_sets"}}</a>
+		<a class="item {{if .PageIsDataSets}}active{{end}}" href="{{AppSubUrl}}/datasets">{{.i18n.Tr "datasets"}}</a>
 	{{end}}
 
 	{{template "custom/extra_links" .}}
@@ -68,6 +68,9 @@
 					<a class="item" href="{{AppSubUrl}}/repo/create">
 						<span class="fitted">{{svg "octicon-plus" 16}}</span> {{.i18n.Tr "new_repo"}}
 					</a>
+					<a class="item" href="{{AppSubUrl}}/datasets/create">
+						<span class="fitted">{{svg "octicon-plus" 16}}</span> {{.i18n.Tr "new_dataset"}}
+					</a>
 					<a class="item" href="{{AppSubUrl}}/repo/migrate">
 						<span class="fitted">{{svg "octicon-repo-clone" 16}}</span> {{.i18n.Tr "new_migrate"}}
 					</a>

templates/dataset/index.tmpl

@@ -1 +0,0 @@
-index.tmpl

templates/datasets/create.tmpl

@@ -0,0 +1,45 @@
+{{template "base/head" .}}
+<div class="dataset new dataset">
+	<div class="ui middle very relaxed page grid">
+		<div class="column">
+			<form class="ui form" action="{{.Link}}" method="post">
+				{{.CsrfTokenHtml}}
+				<h3 class="ui top attached header">
+					{{.i18n.Tr "new_dataset"}}
+				</h3>
+				<div class="ui attached segment">
+					{{template "base/alert" .}}
+					<div class="field">
+						<label>{{.i18n.Tr "dataset.title"}}</label>
+						<input name="title" placeholder="{{.i18n.Tr "dataset.title"}}" value="{{.title}}" autofocus required maxlength="255">
+					</div>
+
+					<div class="field">
+						<label>{{.i18n.Tr "dataset.description"}}</label>
+						<textarea name="description">{{.description}}</textarea>
+					</div>
+
+					<div class="field">
+						<label>{{.i18n.Tr "dataset.category"}}</label>
+						<input name="category" placeholder="{{.i18n.Tr "dataset.category"}}" value="{{.category}}" autofocus required maxlength="255">
+					</div>
+
+					<div class="field">
+						<label>{{.i18n.Tr "dataset.file"}}</label>
+						<div class="files"></div>
+						<div class="ui dropzone" id="dropzone" data-upload-url="{{AppSubUrl}}/attachments" data-accepts="{{.AttachmentAllowedTypes}}" data-max-file="{{.AttachmentMaxFiles}}" data-max-size="{{.AttachmentMaxSize}}" data-default-message="{{.i18n.Tr "dropzone.default_message"}}" data-invalid-input-type="{{.i18n.Tr "dropzone.invalid_input_type"}}" data-file-too-big="{{.i18n.Tr "dropzone.file_too_big"}}" data-remove-file="{{.i18n.Tr "dropzone.remove_file"}}"></div>
+					</div>
+					<br/>
+					<div class="inline field">
+						<label></label>
+						<button class="ui green button">
+							{{.i18n.Tr "repo.create_dataset"}}
+						</button>
+						<a class="ui button" href="{{AppSubUrl}}/">{{.i18n.Tr "cancel"}}</a>
+					</div>
+				</div>
+			</form>
+		</div>
+	</div>
+</div>
+{{template "base/footer" .}}

templates/datasets/index.tmpl

@@ -0,0 +1,3 @@
+{{template "base/head" .}}
+index.tmpl
+{{template "base/footer" .}}

templates/repo/header.tmpl

@@ -101,10 +101,6 @@
 					<a class="{{if .PageIsIssueList}}active{{end}} item" href="{{.RepoLink}}/issues">
 						{{svg "octicon-issue-opened" 16}} {{.i18n.Tr "repo.issues"}} <span class="ui {{if not .Repository.NumOpenIssues}}gray{{else}}blue{{end}} small label">{{.Repository.NumOpenIssues}}</span>
 					</a>
-
-					<a class="{{if .PageIsIssueList}}active{{end}} item" href="{{.RepoLink}}/issues">
-						{{svg "octicon-file-submodule" 16}} {{.i18n.Tr "repo.data_sets"}}
-					</a>
 				{{end}}
 
 				{{if .Permission.CanRead $.UnitTypeExternalTracker}}

vendor/github.com/cpuguy83/go-md2man/v2/LICENSE.md

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Brian Goff
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/cpuguy83/go-md2man/v2/md2man/md2man.go

@@ -0,0 +1,14 @@
+package md2man
+
+import (
+	"github.com/russross/blackfriday/v2"
+)
+
+// Render converts a markdown document into a roff formatted document.
+func Render(doc []byte) []byte {
+	renderer := NewRoffRenderer()
+
+	return blackfriday.Run(doc,
+		[]blackfriday.Option{blackfriday.WithRenderer(renderer),
+			blackfriday.WithExtensions(renderer.GetExtensions())}...)
+}

vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go

@@ -0,0 +1,345 @@
+package md2man
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	"github.com/russross/blackfriday/v2"
+)
+
+// roffRenderer implements the blackfriday.Renderer interface for creating
+// roff format (manpages) from markdown text
+type roffRenderer struct {
+	extensions   blackfriday.Extensions
+	listCounters []int
+	firstHeader  bool
+	defineTerm   bool
+	listDepth    int
+}
+
+const (
+	titleHeader      = ".TH "
+	topLevelHeader   = "\n\n.SH "
+	secondLevelHdr   = "\n.SH "
+	otherHeader      = "\n.SS "
+	crTag            = "\n"
+	emphTag          = "\\fI"
+	emphCloseTag     = "\\fP"
+	strongTag        = "\\fB"
+	strongCloseTag   = "\\fP"
+	breakTag         = "\n.br\n"
+	paraTag          = "\n.PP\n"
+	hruleTag         = "\n.ti 0\n\\l'\\n(.lu'\n"
+	linkTag          = "\n\\[la]"
+	linkCloseTag     = "\\[ra]"
+	codespanTag      = "\\fB\\fC"
+	codespanCloseTag = "\\fR"
+	codeTag          = "\n.PP\n.RS\n\n.nf\n"
+	codeCloseTag     = "\n.fi\n.RE\n"
+	quoteTag         = "\n.PP\n.RS\n"
+	quoteCloseTag    = "\n.RE\n"
+	listTag          = "\n.RS\n"
+	listCloseTag     = "\n.RE\n"
+	arglistTag       = "\n.TP\n"
+	tableStart       = "\n.TS\nallbox;\n"
+	tableEnd         = ".TE\n"
+	tableCellStart   = "T{\n"
+	tableCellEnd     = "\nT}\n"
+)
+
+// NewRoffRenderer creates a new blackfriday Renderer for generating roff documents
+// from markdown
+func NewRoffRenderer() *roffRenderer { // nolint: golint
+	var extensions blackfriday.Extensions
+
+	extensions |= blackfriday.NoIntraEmphasis
+	extensions |= blackfriday.Tables
+	extensions |= blackfriday.FencedCode
+	extensions |= blackfriday.SpaceHeadings
+	extensions |= blackfriday.Footnotes
+	extensions |= blackfriday.Titleblock
+	extensions |= blackfriday.DefinitionLists
+	return &roffRenderer{
+		extensions: extensions,
+	}
+}
+
+// GetExtensions returns the list of extensions used by this renderer implementation
+func (r *roffRenderer) GetExtensions() blackfriday.Extensions {
+	return r.extensions
+}
+
+// RenderHeader handles outputting the header at document start
+func (r *roffRenderer) RenderHeader(w io.Writer, ast *blackfriday.Node) {
+	// disable hyphenation
+	out(w, ".nh\n")
+}
+
+// RenderFooter handles outputting the footer at the document end; the roff
+// renderer has no footer information
+func (r *roffRenderer) RenderFooter(w io.Writer, ast *blackfriday.Node) {
+}
+
+// RenderNode is called for each node in a markdown document; based on the node
+// type the equivalent roff output is sent to the writer
+func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+
+	var walkAction = blackfriday.GoToNext
+
+	switch node.Type {
+	case blackfriday.Text:
+		r.handleText(w, node, entering)
+	case blackfriday.Softbreak:
+		out(w, crTag)
+	case blackfriday.Hardbreak:
+		out(w, breakTag)
+	case blackfriday.Emph:
+		if entering {
+			out(w, emphTag)
+		} else {
+			out(w, emphCloseTag)
+		}
+	case blackfriday.Strong:
+		if entering {
+			out(w, strongTag)
+		} else {
+			out(w, strongCloseTag)
+		}
+	case blackfriday.Link:
+		if !entering {
+			out(w, linkTag+string(node.LinkData.Destination)+linkCloseTag)
+		}
+	case blackfriday.Image:
+		// ignore images
+		walkAction = blackfriday.SkipChildren
+	case blackfriday.Code:
+		out(w, codespanTag)
+		escapeSpecialChars(w, node.Literal)
+		out(w, codespanCloseTag)
+	case blackfriday.Document:
+		break
+	case blackfriday.Paragraph:
+		// roff .PP markers break lists
+		if r.listDepth > 0 {
+			return blackfriday.GoToNext
+		}
+		if entering {
+			out(w, paraTag)
+		} else {
+			out(w, crTag)
+		}
+	case blackfriday.BlockQuote:
+		if entering {
+			out(w, quoteTag)
+		} else {
+			out(w, quoteCloseTag)
+		}
+	case blackfriday.Heading:
+		r.handleHeading(w, node, entering)
+	case blackfriday.HorizontalRule:
+		out(w, hruleTag)
+	case blackfriday.List:
+		r.handleList(w, node, entering)
+	case blackfriday.Item:
+		r.handleItem(w, node, entering)
+	case blackfriday.CodeBlock:
+		out(w, codeTag)
+		escapeSpecialChars(w, node.Literal)
+		out(w, codeCloseTag)
+	case blackfriday.Table:
+		r.handleTable(w, node, entering)
+	case blackfriday.TableCell:
+		r.handleTableCell(w, node, entering)
+	case blackfriday.TableHead:
+	case blackfriday.TableBody:
+	case blackfriday.TableRow:
+		// no action as cell entries do all the nroff formatting
+		return blackfriday.GoToNext
+	default:
+		fmt.Fprintln(os.Stderr, "WARNING: go-md2man does not handle node type "+node.Type.String())
+	}
+	return walkAction
+}
+
+func (r *roffRenderer) handleText(w io.Writer, node *blackfriday.Node, entering bool) {
+	var (
+		start, end string
+	)
+	// handle special roff table cell text encapsulation
+	if node.Parent.Type == blackfriday.TableCell {
+		if len(node.Literal) > 30 {
+			start = tableCellStart
+			end = tableCellEnd
+		} else {
+			// end rows that aren't terminated by "tableCellEnd" with a cr if end of row
+			if node.Parent.Next == nil && !node.Parent.IsHeader {
+				end = crTag
+			}
+		}
+	}
+	out(w, start)
+	escapeSpecialChars(w, node.Literal)
+	out(w, end)
+}
+
+func (r *roffRenderer) handleHeading(w io.Writer, node *blackfriday.Node, entering bool) {
+	if entering {
+		switch node.Level {
+		case 1:
+			if !r.firstHeader {
+				out(w, titleHeader)
+				r.firstHeader = true
+				break
+			}
+			out(w, topLevelHeader)
+		case 2:
+			out(w, secondLevelHdr)
+		default:
+			out(w, otherHeader)
+		}
+	}
+}
+
+func (r *roffRenderer) handleList(w io.Writer, node *blackfriday.Node, entering bool) {
+	openTag := listTag
+	closeTag := listCloseTag
+	if node.ListFlags&blackfriday.ListTypeDefinition != 0 {
+		// tags for definition lists handled within Item node
+		openTag = ""
+		closeTag = ""
+	}
+	if entering {
+		r.listDepth++
+		if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
+			r.listCounters = append(r.listCounters, 1)
+		}
+		out(w, openTag)
+	} else {
+		if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
+			r.listCounters = r.listCounters[:len(r.listCounters)-1]
+		}
+		out(w, closeTag)
+		r.listDepth--
+	}
+}
+
+func (r *roffRenderer) handleItem(w io.Writer, node *blackfriday.Node, entering bool) {
+	if entering {
+		if node.ListFlags&blackfriday.ListTypeOrdered != 0 {
+			out(w, fmt.Sprintf(".IP \"%3d.\" 5\n", r.listCounters[len(r.listCounters)-1]))
+			r.listCounters[len(r.listCounters)-1]++
+		} else if node.ListFlags&blackfriday.ListTypeDefinition != 0 {
+			// state machine for handling terms and following definitions
+			// since blackfriday does not distinguish them properly, nor
+			// does it seperate them into separate lists as it should
+			if !r.defineTerm {
+				out(w, arglistTag)
+				r.defineTerm = true
+			} else {
+				r.defineTerm = false
+			}
+		} else {
+			out(w, ".IP \\(bu 2\n")
+		}
+	} else {
+		out(w, "\n")
+	}
+}
+
+func (r *roffRenderer) handleTable(w io.Writer, node *blackfriday.Node, entering bool) {
+	if entering {
+		out(w, tableStart)
+		//call walker to count cells (and rows?) so format section can be produced
+		columns := countColumns(node)
+		out(w, strings.Repeat("l ", columns)+"\n")
+		out(w, strings.Repeat("l ", columns)+".\n")
+	} else {
+		out(w, tableEnd)
+	}
+}
+
+func (r *roffRenderer) handleTableCell(w io.Writer, node *blackfriday.Node, entering bool) {
+	var (
+		start, end string
+	)
+	if node.IsHeader {
+		start = codespanTag
+		end = codespanCloseTag
+	}
+	if entering {
+		if node.Prev != nil && node.Prev.Type == blackfriday.TableCell {
+			out(w, "\t"+start)
+		} else {
+			out(w, start)
+		}
+	} else {
+		// need to carriage return if we are at the end of the header row
+		if node.IsHeader && node.Next == nil {
+			end = end + crTag
+		}
+		out(w, end)
+	}
+}
+
+// because roff format requires knowing the column count before outputting any table
+// data we need to walk a table tree and count the columns
+func countColumns(node *blackfriday.Node) int {
+	var columns int
+
+	node.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+		switch node.Type {
+		case blackfriday.TableRow:
+			if !entering {
+				return blackfriday.Terminate
+			}
+		case blackfriday.TableCell:
+			if entering {
+				columns++
+			}
+		default:
+		}
+		return blackfriday.GoToNext
+	})
+	return columns
+}
+
+func out(w io.Writer, output string) {
+	io.WriteString(w, output) // nolint: errcheck
+}
+
+func needsBackslash(c byte) bool {
+	for _, r := range []byte("-_&\\~") {
+		if c == r {
+			return true
+		}
+	}
+	return false
+}
+
+func escapeSpecialChars(w io.Writer, text []byte) {
+	for i := 0; i < len(text); i++ {
+		// escape initial apostrophe or period
+		if len(text) >= 1 && (text[0] == '\'' || text[0] == '.') {
+			out(w, "\\&")
+		}
+
+		// directly copy normal characters
+		org := i
+
+		for i < len(text) && !needsBackslash(text[i]) {
+			i++
+		}
+		if i > org {
+			w.Write(text[org:i]) // nolint: errcheck
+		}
+
+		// escape a character
+		if i >= len(text) {
+			break
+		}
+
+		w.Write([]byte{'\\', text[i]}) // nolint: errcheck
+	}
+}

vendor/github.com/russross/blackfriday/v2/.gitignore

@@ -0,0 +1,8 @@
+*.out
+*.swp
+*.8
+*.6
+_obj
+_test*
+markdown
+tags

vendor/github.com/russross/blackfriday/v2/.travis.yml

@@ -0,0 +1,17 @@
+sudo: false
+language: go
+go:
+  - "1.10.x"
+  - "1.11.x"
+  - tip
+matrix:
+  fast_finish: true
+  allow_failures:
+    - go: tip
+install:
+  - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
+script:
+  - go get -t -v ./...
+  - diff -u <(echo -n) <(gofmt -d -s .)
+  - go tool vet .
+  - go test -v ./...

vendor/github.com/russross/blackfriday/v2/LICENSE.txt

@@ -0,0 +1,29 @@
+Blackfriday is distributed under the Simplified BSD License:
+
+> Copyright © 2011 Russ Ross
+> All rights reserved.
+>
+> Redistribution and use in source and binary forms, with or without
+> modification, are permitted provided that the following conditions
+> are met:
+>
+> 1.  Redistributions of source code must retain the above copyright
+>     notice, this list of conditions and the following disclaimer.
+>
+> 2.  Redistributions in binary form must reproduce the above
+>     copyright notice, this list of conditions and the following
+>     disclaimer in the documentation and/or other materials provided with
+>     the distribution.
+>
+> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+> "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+> LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+> FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+> COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+> INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+> BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+> LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+> CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+> LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+> ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+> POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/russross/blackfriday/v2/README.md

@@ -0,0 +1,291 @@
+Blackfriday [![Build Status](https://travis-ci.org/russross/blackfriday.svg?branch=master)](https://travis-ci.org/russross/blackfriday)
+===========
+
+Blackfriday is a [Markdown][1] processor implemented in [Go][2]. It
+is paranoid about its input (so you can safely feed it user-supplied
+data), it is fast, it supports common extensions (tables, smart
+punctuation substitutions, etc.), and it is safe for all utf-8
+(unicode) input.
+
+HTML output is currently supported, along with Smartypants
+extensions.
+
+It started as a translation from C of [Sundown][3].
+
+
+Installation
+------------
+
+Blackfriday is compatible with any modern Go release. With Go 1.7 and git
+installed:
+
+    go get gopkg.in/russross/blackfriday.v2
+
+will download, compile, and install the package into your `$GOPATH`
+directory hierarchy. Alternatively, you can achieve the same if you
+import it into a project:
+
+    import "gopkg.in/russross/blackfriday.v2"
+
+and `go get` without parameters.
+
+
+Versions
+--------
+
+Currently maintained and recommended version of Blackfriday is `v2`. It's being
+developed on its own branch: https://github.com/russross/blackfriday/tree/v2 and the
+documentation is available at
+https://godoc.org/gopkg.in/russross/blackfriday.v2.
+
+It is `go get`-able via via [gopkg.in][6] at `gopkg.in/russross/blackfriday.v2`,
+but we highly recommend using package management tool like [dep][7] or
+[Glide][8] and make use of semantic versioning. With package management you
+should import `github.com/russross/blackfriday` and specify that you're using
+version 2.0.0.
+
+Version 2 offers a number of improvements over v1:
+
+* Cleaned up API
+* A separate call to [`Parse`][4], which produces an abstract syntax tree for
+  the document
+* Latest bug fixes
+* Flexibility to easily add your own rendering extensions
+
+Potential drawbacks:
+
+* Our benchmarks show v2 to be slightly slower than v1. Currently in the
+  ballpark of around 15%.
+* API breakage. If you can't afford modifying your code to adhere to the new API
+  and don't care too much about the new features, v2 is probably not for you.
+* Several bug fixes are trailing behind and still need to be forward-ported to
+  v2. See issue [#348](https://github.com/russross/blackfriday/issues/348) for
+  tracking.
+
+Usage
+-----
+
+For the most sensible markdown processing, it is as simple as getting your input
+into a byte slice and calling:
+
+```go
+output := blackfriday.Run(input)
+```
+
+Your input will be parsed and the output rendered with a set of most popular
+extensions enabled. If you want the most basic feature set, corresponding with
+the bare Markdown specification, use:
+
+```go
+output := blackfriday.Run(input, blackfriday.WithNoExtensions())
+```
+
+### Sanitize untrusted content
+
+Blackfriday itself does nothing to protect against malicious content. If you are
+dealing with user-supplied markdown, we recommend running Blackfriday's output
+through HTML sanitizer such as [Bluemonday][5].
+
+Here's an example of simple usage of Blackfriday together with Bluemonday:
+
+```go
+import (
+    "github.com/microcosm-cc/bluemonday"
+    "github.com/russross/blackfriday"
+)
+
+// ...
+unsafe := blackfriday.Run(input)
+html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
+```
+
+### Custom options
+
+If you want to customize the set of options, use `blackfriday.WithExtensions`,
+`blackfriday.WithRenderer` and `blackfriday.WithRefOverride`.
+
+You can also check out `blackfriday-tool` for a more complete example
+of how to use it. Download and install it using:
+
+    go get github.com/russross/blackfriday-tool
+
+This is a simple command-line tool that allows you to process a
+markdown file using a standalone program.  You can also browse the
+source directly on github if you are just looking for some example
+code:
+
+* <http://github.com/russross/blackfriday-tool>
+
+Note that if you have not already done so, installing
+`blackfriday-tool` will be sufficient to download and install
+blackfriday in addition to the tool itself. The tool binary will be
+installed in `$GOPATH/bin`.  This is a statically-linked binary that
+can be copied to wherever you need it without worrying about
+dependencies and library versions.
+
+
+Features
+--------
+
+All features of Sundown are supported, including:
+
+*   **Compatibility**. The Markdown v1.0.3 test suite passes with
+    the `--tidy` option.  Without `--tidy`, the differences are
+    mostly in whitespace and entity escaping, where blackfriday is
+    more consistent and cleaner.
+
+*   **Common extensions**, including table support, fenced code
+    blocks, autolinks, strikethroughs, non-strict emphasis, etc.
+
+*   **Safety**. Blackfriday is paranoid when parsing, making it safe
+    to feed untrusted user input without fear of bad things
+    happening. The test suite stress tests this and there are no
+    known inputs that make it crash.  If you find one, please let me
+    know and send me the input that does it.
+
+    NOTE: "safety" in this context means *runtime safety only*. In order to
+    protect yourself against JavaScript injection in untrusted content, see
+    [this example](https://github.com/russross/blackfriday#sanitize-untrusted-content).
+
+*   **Fast processing**. It is fast enough to render on-demand in
+    most web applications without having to cache the output.
+
+*   **Thread safety**. You can run multiple parsers in different
+    goroutines without ill effect. There is no dependence on global
+    shared state.
+
+*   **Minimal dependencies**. Blackfriday only depends on standard
+    library packages in Go. The source code is pretty
+    self-contained, so it is easy to add to any project, including
+    Google App Engine projects.
+
+*   **Standards compliant**. Output successfully validates using the
+    W3C validation tool for HTML 4.01 and XHTML 1.0 Transitional.
+
+
+Extensions
+----------
+
+In addition to the standard markdown syntax, this package
+implements the following extensions:
+
+*   **Intra-word emphasis supression**. The `_` character is
+    commonly used inside words when discussing code, so having
+    markdown interpret it as an emphasis command is usually the
+    wrong thing. Blackfriday lets you treat all emphasis markers as
+    normal characters when they occur inside a word.
+
+*   **Tables**. Tables can be created by drawing them in the input
+    using a simple syntax:
+
+    ```
+    Name    | Age
+    --------|------
+    Bob     | 27
+    Alice   | 23
+    ```
+
+*   **Fenced code blocks**. In addition to the normal 4-space
+    indentation to mark code blocks, you can explicitly mark them
+    and supply a language (to make syntax highlighting simple). Just
+    mark it like this:
+
+        ```go
+        func getTrue() bool {
+            return true
+        }
+        ```
+
+    You can use 3 or more backticks to mark the beginning of the
+    block, and the same number to mark the end of the block.
+
+*   **Definition lists**. A simple definition list is made of a single-line
+    term followed by a colon and the definition for that term.
+
+        Cat
+        : Fluffy animal everyone likes
+
+        Internet
+        : Vector of transmission for pictures of cats
+
+    Terms must be separated from the previous definition by a blank line.
+
+*   **Footnotes**. A marker in the text that will become a superscript number;
+    a footnote definition that will be placed in a list of footnotes at the
+    end of the document. A footnote looks like this:
+
+        This is a footnote.[^1]
+
+        [^1]: the footnote text.
+
+*   **Autolinking**. Blackfriday can find URLs that have not been
+    explicitly marked as links and turn them into links.
+
+*   **Strikethrough**. Use two tildes (`~~`) to mark text that
+    should be crossed out.
+
+*   **Hard line breaks**. With this extension enabled newlines in the input
+    translate into line breaks in the output. This extension is off by default.
+
+*   **Smart quotes**. Smartypants-style punctuation substitution is
+    supported, turning normal double- and single-quote marks into
+    curly quotes, etc.
+
+*   **LaTeX-style dash parsing** is an additional option, where `--`
+    is translated into `&ndash;`, and `---` is translated into
+    `&mdash;`. This differs from most smartypants processors, which
+    turn a single hyphen into an ndash and a double hyphen into an
+    mdash.
+
+*   **Smart fractions**, where anything that looks like a fraction
+    is translated into suitable HTML (instead of just a few special
+    cases like most smartypant processors). For example, `4/5`
+    becomes `<sup>4</sup>&frasl;<sub>5</sub>`, which renders as
+    <sup>4</sup>&frasl;<sub>5</sub>.
+
+
+Other renderers
+---------------
+
+Blackfriday is structured to allow alternative rendering engines. Here
+are a few of note:
+
+*   [github_flavored_markdown](https://godoc.org/github.com/shurcooL/github_flavored_markdown):
+    provides a GitHub Flavored Markdown renderer with fenced code block
+    highlighting, clickable heading anchor links.
+
+    It's not customizable, and its goal is to produce HTML output
+    equivalent to the [GitHub Markdown API endpoint](https://developer.github.com/v3/markdown/#render-a-markdown-document-in-raw-mode),
+    except the rendering is performed locally.
+
+*   [markdownfmt](https://github.com/shurcooL/markdownfmt): like gofmt,
+    but for markdown.
+
+*   [LaTeX output](https://github.com/Ambrevar/Blackfriday-LaTeX):
+    renders output as LaTeX.
+
+*   [Blackfriday-Confluence](https://github.com/kentaro-m/blackfriday-confluence): provides a [Confluence Wiki Markup](https://confluence.atlassian.com/doc/confluence-wiki-markup-251003035.html) renderer.
+
+
+Todo
+----
+
+*   More unit testing
+*   Improve unicode support. It does not understand all unicode
+    rules (about what constitutes a letter, a punctuation symbol,
+    etc.), so it may fail to detect word boundaries correctly in
+    some instances. It is safe on all utf-8 input.
+
+
+License
+-------
+
+[Blackfriday is distributed under the Simplified BSD License](LICENSE.txt)
+
+
+   [1]: https://daringfireball.net/projects/markdown/ "Markdown"
+   [2]: https://golang.org/ "Go Language"
+   [3]: https://github.com/vmg/sundown "Sundown"
+   [4]: https://godoc.org/gopkg.in/russross/blackfriday.v2#Parse "Parse func"
+   [5]: https://github.com/microcosm-cc/bluemonday "Bluemonday"
+   [6]: https://labix.org/gopkg.in "gopkg.in"

vendor/github.com/russross/blackfriday/v2/doc.go

@@ -0,0 +1,18 @@
+// Package blackfriday is a markdown processor.
+//
+// It translates plain text with simple formatting rules into an AST, which can
+// then be further processed to HTML (provided by Blackfriday itself) or other
+// formats (provided by the community).
+//
+// The simplest way to invoke Blackfriday is to call the Run function. It will
+// take a text input and produce a text output in HTML (or other format).
+//
+// A slightly more sophisticated way to use Blackfriday is to create a Markdown
+// processor and to call Parse, which returns a syntax tree for the input
+// document. You can leverage Blackfriday's parsing for content extraction from
+// markdown documents. You can assign a custom renderer and set various options
+// to the Markdown processor.
+//
+// If you're interested in calling Blackfriday from command line, see
+// https://github.com/russross/blackfriday-tool.
+package blackfriday

vendor/github.com/russross/blackfriday/v2/esc.go

@@ -0,0 +1,34 @@
+package blackfriday
+
+import (
+	"html"
+	"io"
+)
+
+var htmlEscaper = [256][]byte{
+	'&': []byte("&"),
+	'<': []byte("&lt;"),
+	'>': []byte("&gt;"),
+	'"': []byte("&quot;"),
+}
+
+func escapeHTML(w io.Writer, s []byte) {
+	var start, end int
+	for end < len(s) {
+		escSeq := htmlEscaper[s[end]]
+		if escSeq != nil {
+			w.Write(s[start:end])
+			w.Write(escSeq)
+			start = end + 1
+		}
+		end++
+	}
+	if start < len(s) && end <= len(s) {
+		w.Write(s[start:end])
+	}
+}
+
+func escLink(w io.Writer, text []byte) {
+	unesc := html.UnescapeString(string(text))
+	escapeHTML(w, []byte(unesc))
+}

vendor/github.com/russross/blackfriday/v2/go.mod

@@ -0,0 +1 @@
+module github.com/russross/blackfriday/v2

vendor/github.com/russross/blackfriday/v2/html.go

@@ -0,0 +1,949 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+//
+// HTML rendering backend
+//
+//
+
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"regexp"
+	"strings"
+)
+
+// HTMLFlags control optional behavior of HTML renderer.
+type HTMLFlags int
+
+// HTML renderer configuration options.
+const (
+	HTMLFlagsNone           HTMLFlags = 0
+	SkipHTML                HTMLFlags = 1 << iota // Skip preformatted HTML blocks
+	SkipImages                                    // Skip embedded images
+	SkipLinks                                     // Skip all links
+	Safelink                                      // Only link to trusted protocols
+	NofollowLinks                                 // Only link with rel="nofollow"
+	NoreferrerLinks                               // Only link with rel="noreferrer"
+	NoopenerLinks                                 // Only link with rel="noopener"
+	HrefTargetBlank                               // Add a blank target
+	CompletePage                                  // Generate a complete HTML page
+	UseXHTML                                      // Generate XHTML output instead of HTML
+	FootnoteReturnLinks                           // Generate a link at the end of a footnote to return to the source
+	Smartypants                                   // Enable smart punctuation substitutions
+	SmartypantsFractions                          // Enable smart fractions (with Smartypants)
+	SmartypantsDashes                             // Enable smart dashes (with Smartypants)
+	SmartypantsLatexDashes                        // Enable LaTeX-style dashes (with Smartypants)
+	SmartypantsAngledQuotes                       // Enable angled double quotes (with Smartypants) for double quotes rendering
+	SmartypantsQuotesNBSP                         // Enable « French guillemets » (with Smartypants)
+	TOC                                           // Generate a table of contents
+)
+
+var (
+	htmlTagRe = regexp.MustCompile("(?i)^" + htmlTag)
+)
+
+const (
+	htmlTag = "(?:" + openTag + "|" + closeTag + "|" + htmlComment + "|" +
+		processingInstruction + "|" + declaration + "|" + cdata + ")"
+	closeTag              = "</" + tagName + "\\s*[>]"
+	openTag               = "<" + tagName + attribute + "*" + "\\s*/?>"
+	attribute             = "(?:" + "\\s+" + attributeName + attributeValueSpec + "?)"
+	attributeValue        = "(?:" + unquotedValue + "|" + singleQuotedValue + "|" + doubleQuotedValue + ")"
+	attributeValueSpec    = "(?:" + "\\s*=" + "\\s*" + attributeValue + ")"
+	attributeName         = "[a-zA-Z_:][a-zA-Z0-9:._-]*"
+	cdata                 = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>"
+	declaration           = "<![A-Z]+" + "\\s+[^>]*>"
+	doubleQuotedValue     = "\"[^\"]*\""
+	htmlComment           = "<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->"
+	processingInstruction = "[<][?].*?[?][>]"
+	singleQuotedValue     = "'[^']*'"
+	tagName               = "[A-Za-z][A-Za-z0-9-]*"
+	unquotedValue         = "[^\"'=<>`\\x00-\\x20]+"
+)
+
+// HTMLRendererParameters is a collection of supplementary parameters tweaking
+// the behavior of various parts of HTML renderer.
+type HTMLRendererParameters struct {
+	// Prepend this text to each relative URL.
+	AbsolutePrefix string
+	// Add this text to each footnote anchor, to ensure uniqueness.
+	FootnoteAnchorPrefix string
+	// Show this text inside the <a> tag for a footnote return link, if the
+	// HTML_FOOTNOTE_RETURN_LINKS flag is enabled. If blank, the string
+	// <sup>[return]</sup> is used.
+	FootnoteReturnLinkContents string
+	// If set, add this text to the front of each Heading ID, to ensure
+	// uniqueness.
+	HeadingIDPrefix string
+	// If set, add this text to the back of each Heading ID, to ensure uniqueness.
+	HeadingIDSuffix string
+	// Increase heading levels: if the offset is 1, <h1> becomes <h2> etc.
+	// Negative offset is also valid.
+	// Resulting levels are clipped between 1 and 6.
+	HeadingLevelOffset int
+
+	Title string // Document title (used if CompletePage is set)
+	CSS   string // Optional CSS file URL (used if CompletePage is set)
+	Icon  string // Optional icon file URL (used if CompletePage is set)
+
+	Flags HTMLFlags // Flags allow customizing this renderer's behavior
+}
+
+// HTMLRenderer is a type that implements the Renderer interface for HTML output.
+//
+// Do not create this directly, instead use the NewHTMLRenderer function.
+type HTMLRenderer struct {
+	HTMLRendererParameters
+
+	closeTag string // how to end singleton tags: either " />" or ">"
+
+	// Track heading IDs to prevent ID collision in a single generation.
+	headingIDs map[string]int
+
+	lastOutputLen int
+	disableTags   int
+
+	sr *SPRenderer
+}
+
+const (
+	xhtmlClose = " />"
+	htmlClose  = ">"
+)
+
+// NewHTMLRenderer creates and configures an HTMLRenderer object, which
+// satisfies the Renderer interface.
+func NewHTMLRenderer(params HTMLRendererParameters) *HTMLRenderer {
+	// configure the rendering engine
+	closeTag := htmlClose
+	if params.Flags&UseXHTML != 0 {
+		closeTag = xhtmlClose
+	}
+
+	if params.FootnoteReturnLinkContents == "" {
+		params.FootnoteReturnLinkContents = `<sup>[return]</sup>`
+	}
+
+	return &HTMLRenderer{
+		HTMLRendererParameters: params,
+
+		closeTag:   closeTag,
+		headingIDs: make(map[string]int),
+
+		sr: NewSmartypantsRenderer(params.Flags),
+	}
+}
+
+func isHTMLTag(tag []byte, tagname string) bool {
+	found, _ := findHTMLTagPos(tag, tagname)
+	return found
+}
+
+// Look for a character, but ignore it when it's in any kind of quotes, it
+// might be JavaScript
+func skipUntilCharIgnoreQuotes(html []byte, start int, char byte) int {
+	inSingleQuote := false
+	inDoubleQuote := false
+	inGraveQuote := false
+	i := start
+	for i < len(html) {
+		switch {
+		case html[i] == char && !inSingleQuote && !inDoubleQuote && !inGraveQuote:
+			return i
+		case html[i] == '\'':
+			inSingleQuote = !inSingleQuote
+		case html[i] == '"':
+			inDoubleQuote = !inDoubleQuote
+		case html[i] == '`':
+			inGraveQuote = !inGraveQuote
+		}
+		i++
+	}
+	return start
+}
+
+func findHTMLTagPos(tag []byte, tagname string) (bool, int) {
+	i := 0
+	if i < len(tag) && tag[0] != '<' {
+		return false, -1
+	}
+	i++
+	i = skipSpace(tag, i)
+
+	if i < len(tag) && tag[i] == '/' {
+		i++
+	}
+
+	i = skipSpace(tag, i)
+	j := 0
+	for ; i < len(tag); i, j = i+1, j+1 {
+		if j >= len(tagname) {
+			break
+		}
+
+		if strings.ToLower(string(tag[i]))[0] != tagname[j] {
+			return false, -1
+		}
+	}
+
+	if i == len(tag) {
+		return false, -1
+	}
+
+	rightAngle := skipUntilCharIgnoreQuotes(tag, i, '>')
+	if rightAngle >= i {
+		return true, rightAngle
+	}
+
+	return false, -1
+}
+
+func skipSpace(tag []byte, i int) int {
+	for i < len(tag) && isspace(tag[i]) {
+		i++
+	}
+	return i
+}
+
+func isRelativeLink(link []byte) (yes bool) {
+	// a tag begin with '#'
+	if link[0] == '#' {
+		return true
+	}
+
+	// link begin with '/' but not '//', the second maybe a protocol relative link
+	if len(link) >= 2 && link[0] == '/' && link[1] != '/' {
+		return true
+	}
+
+	// only the root '/'
+	if len(link) == 1 && link[0] == '/' {
+		return true
+	}
+
+	// current directory : begin with "./"
+	if bytes.HasPrefix(link, []byte("./")) {
+		return true
+	}
+
+	// parent directory : begin with "../"
+	if bytes.HasPrefix(link, []byte("../")) {
+		return true
+	}
+
+	return false
+}
+
+func (r *HTMLRenderer) ensureUniqueHeadingID(id string) string {
+	for count, found := r.headingIDs[id]; found; count, found = r.headingIDs[id] {
+		tmp := fmt.Sprintf("%s-%d", id, count+1)
+
+		if _, tmpFound := r.headingIDs[tmp]; !tmpFound {
+			r.headingIDs[id] = count + 1
+			id = tmp
+		} else {
+			id = id + "-1"
+		}
+	}
+
+	if _, found := r.headingIDs[id]; !found {
+		r.headingIDs[id] = 0
+	}
+
+	return id
+}
+
+func (r *HTMLRenderer) addAbsPrefix(link []byte) []byte {
+	if r.AbsolutePrefix != "" && isRelativeLink(link) && link[0] != '.' {
+		newDest := r.AbsolutePrefix
+		if link[0] != '/' {
+			newDest += "/"
+		}
+		newDest += string(link)
+		return []byte(newDest)
+	}
+	return link
+}
+
+func appendLinkAttrs(attrs []string, flags HTMLFlags, link []byte) []string {
+	if isRelativeLink(link) {
+		return attrs
+	}
+	val := []string{}
+	if flags&NofollowLinks != 0 {
+		val = append(val, "nofollow")
+	}
+	if flags&NoreferrerLinks != 0 {
+		val = append(val, "noreferrer")
+	}
+	if flags&NoopenerLinks != 0 {
+		val = append(val, "noopener")
+	}
+	if flags&HrefTargetBlank != 0 {
+		attrs = append(attrs, "target=\"_blank\"")
+	}
+	if len(val) == 0 {
+		return attrs
+	}
+	attr := fmt.Sprintf("rel=%q", strings.Join(val, " "))
+	return append(attrs, attr)
+}
+
+func isMailto(link []byte) bool {
+	return bytes.HasPrefix(link, []byte("mailto:"))
+}
+
+func needSkipLink(flags HTMLFlags, dest []byte) bool {
+	if flags&SkipLinks != 0 {
+		return true
+	}
+	return flags&Safelink != 0 && !isSafeLink(dest) && !isMailto(dest)
+}
+
+func isSmartypantable(node *Node) bool {
+	pt := node.Parent.Type
+	return pt != Link && pt != CodeBlock && pt != Code
+}
+
+func appendLanguageAttr(attrs []string, info []byte) []string {
+	if len(info) == 0 {
+		return attrs
+	}
+	endOfLang := bytes.IndexAny(info, "\t ")
+	if endOfLang < 0 {
+		endOfLang = len(info)
+	}
+	return append(attrs, fmt.Sprintf("class=\"language-%s\"", info[:endOfLang]))
+}
+
+func (r *HTMLRenderer) tag(w io.Writer, name []byte, attrs []string) {
+	w.Write(name)
+	if len(attrs) > 0 {
+		w.Write(spaceBytes)
+		w.Write([]byte(strings.Join(attrs, " ")))
+	}
+	w.Write(gtBytes)
+	r.lastOutputLen = 1
+}
+
+func footnoteRef(prefix string, node *Node) []byte {
+	urlFrag := prefix + string(slugify(node.Destination))
+	anchor := fmt.Sprintf(`<a href="#fn:%s">%d</a>`, urlFrag, node.NoteID)
+	return []byte(fmt.Sprintf(`<sup class="footnote-ref" id="fnref:%s">%s</sup>`, urlFrag, anchor))
+}
+
+func footnoteItem(prefix string, slug []byte) []byte {
+	return []byte(fmt.Sprintf(`<li id="fn:%s%s">`, prefix, slug))
+}
+
+func footnoteReturnLink(prefix, returnLink string, slug []byte) []byte {
+	const format = ` <a class="footnote-return" href="#fnref:%s%s">%s</a>`
+	return []byte(fmt.Sprintf(format, prefix, slug, returnLink))
+}
+
+func itemOpenCR(node *Node) bool {
+	if node.Prev == nil {
+		return false
+	}
+	ld := node.Parent.ListData
+	return !ld.Tight && ld.ListFlags&ListTypeDefinition == 0
+}
+
+func skipParagraphTags(node *Node) bool {
+	grandparent := node.Parent.Parent
+	if grandparent == nil || grandparent.Type != List {
+		return false
+	}
+	tightOrTerm := grandparent.Tight || node.Parent.ListFlags&ListTypeTerm != 0
+	return grandparent.Type == List && tightOrTerm
+}
+
+func cellAlignment(align CellAlignFlags) string {
+	switch align {
+	case TableAlignmentLeft:
+		return "left"
+	case TableAlignmentRight:
+		return "right"
+	case TableAlignmentCenter:
+		return "center"
+	default:
+		return ""
+	}
+}
+
+func (r *HTMLRenderer) out(w io.Writer, text []byte) {
+	if r.disableTags > 0 {
+		w.Write(htmlTagRe.ReplaceAll(text, []byte{}))
+	} else {
+		w.Write(text)
+	}
+	r.lastOutputLen = len(text)
+}
+
+func (r *HTMLRenderer) cr(w io.Writer) {
+	if r.lastOutputLen > 0 {
+		r.out(w, nlBytes)
+	}
+}
+
+var (
+	nlBytes    = []byte{'\n'}
+	gtBytes    = []byte{'>'}
+	spaceBytes = []byte{' '}
+)
+
+var (
+	brTag              = []byte("<br>")
+	brXHTMLTag         = []byte("<br />")
+	emTag              = []byte("<em>")
+	emCloseTag         = []byte("</em>")
+	strongTag          = []byte("<strong>")
+	strongCloseTag     = []byte("</strong>")
+	delTag             = []byte("<del>")
+	delCloseTag        = []byte("</del>")
+	ttTag              = []byte("<tt>")
+	ttCloseTag         = []byte("</tt>")
+	aTag               = []byte("<a")
+	aCloseTag          = []byte("</a>")
+	preTag             = []byte("<pre>")
+	preCloseTag        = []byte("</pre>")
+	codeTag            = []byte("<code>")
+	codeCloseTag       = []byte("</code>")
+	pTag               = []byte("<p>")
+	pCloseTag          = []byte("</p>")
+	blockquoteTag      = []byte("<blockquote>")
+	blockquoteCloseTag = []byte("</blockquote>")
+	hrTag              = []byte("<hr>")
+	hrXHTMLTag         = []byte("<hr />")
+	ulTag              = []byte("<ul>")
+	ulCloseTag         = []byte("</ul>")
+	olTag              = []byte("<ol>")
+	olCloseTag         = []byte("</ol>")
+	dlTag              = []byte("<dl>")
+	dlCloseTag         = []byte("</dl>")
+	liTag              = []byte("<li>")
+	liCloseTag         = []byte("</li>")
+	ddTag              = []byte("<dd>")
+	ddCloseTag         = []byte("</dd>")
+	dtTag              = []byte("<dt>")
+	dtCloseTag         = []byte("</dt>")
+	tableTag           = []byte("<table>")
+	tableCloseTag      = []byte("</table>")
+	tdTag              = []byte("<td")
+	tdCloseTag         = []byte("</td>")
+	thTag              = []byte("<th")
+	thCloseTag         = []byte("</th>")
+	theadTag           = []byte("<thead>")
+	theadCloseTag      = []byte("</thead>")
+	tbodyTag           = []byte("<tbody>")
+	tbodyCloseTag      = []byte("</tbody>")
+	trTag              = []byte("<tr>")
+	trCloseTag         = []byte("</tr>")
+	h1Tag              = []byte("<h1")
+	h1CloseTag         = []byte("</h1>")
+	h2Tag              = []byte("<h2")
+	h2CloseTag         = []byte("</h2>")
+	h3Tag              = []byte("<h3")
+	h3CloseTag         = []byte("</h3>")
+	h4Tag              = []byte("<h4")
+	h4CloseTag         = []byte("</h4>")
+	h5Tag              = []byte("<h5")
+	h5CloseTag         = []byte("</h5>")
+	h6Tag              = []byte("<h6")
+	h6CloseTag         = []byte("</h6>")
+
+	footnotesDivBytes      = []byte("\n<div class=\"footnotes\">\n\n")
+	footnotesCloseDivBytes = []byte("\n</div>\n")
+)
+
+func headingTagsFromLevel(level int) ([]byte, []byte) {
+	if level <= 1 {
+		return h1Tag, h1CloseTag
+	}
+	switch level {
+	case 2:
+		return h2Tag, h2CloseTag
+	case 3:
+		return h3Tag, h3CloseTag
+	case 4:
+		return h4Tag, h4CloseTag
+	case 5:
+		return h5Tag, h5CloseTag
+	}
+	return h6Tag, h6CloseTag
+}
+
+func (r *HTMLRenderer) outHRTag(w io.Writer) {
+	if r.Flags&UseXHTML == 0 {
+		r.out(w, hrTag)
+	} else {
+		r.out(w, hrXHTMLTag)
+	}
+}
+
+// RenderNode is a default renderer of a single node of a syntax tree. For
+// block nodes it will be called twice: first time with entering=true, second
+// time with entering=false, so that it could know when it's working on an open
+// tag and when on close. It writes the result to w.
+//
+// The return value is a way to tell the calling walker to adjust its walk
+// pattern: e.g. it can terminate the traversal by returning Terminate. Or it
+// can ask the walker to skip a subtree of this node by returning SkipChildren.
+// The typical behavior is to return GoToNext, which asks for the usual
+// traversal to the next node.
+func (r *HTMLRenderer) RenderNode(w io.Writer, node *Node, entering bool) WalkStatus {
+	attrs := []string{}
+	switch node.Type {
+	case Text:
+		if r.Flags&Smartypants != 0 {
+			var tmp bytes.Buffer
+			escapeHTML(&tmp, node.Literal)
+			r.sr.Process(w, tmp.Bytes())
+		} else {
+			if node.Parent.Type == Link {
+				escLink(w, node.Literal)
+			} else {
+				escapeHTML(w, node.Literal)
+			}
+		}
+	case Softbreak:
+		r.cr(w)
+		// TODO: make it configurable via out(renderer.softbreak)
+	case Hardbreak:
+		if r.Flags&UseXHTML == 0 {
+			r.out(w, brTag)
+		} else {
+			r.out(w, brXHTMLTag)
+		}
+		r.cr(w)
+	case Emph:
+		if entering {
+			r.out(w, emTag)
+		} else {
+			r.out(w, emCloseTag)
+		}
+	case Strong:
+		if entering {
+			r.out(w, strongTag)
+		} else {
+			r.out(w, strongCloseTag)
+		}
+	case Del:
+		if entering {
+			r.out(w, delTag)
+		} else {
+			r.out(w, delCloseTag)
+		}
+	case HTMLSpan:
+		if r.Flags&SkipHTML != 0 {
+			break
+		}
+		r.out(w, node.Literal)
+	case Link:
+		// mark it but don't link it if it is not a safe link: no smartypants
+		dest := node.LinkData.Destination
+		if needSkipLink(r.Flags, dest) {
+			if entering {
+				r.out(w, ttTag)
+			} else {
+				r.out(w, ttCloseTag)
+			}
+		} else {
+			if entering {
+				dest = r.addAbsPrefix(dest)
+				var hrefBuf bytes.Buffer
+				hrefBuf.WriteString("href=\"")
+				escLink(&hrefBuf, dest)
+				hrefBuf.WriteByte('"')
+				attrs = append(attrs, hrefBuf.String())
+				if node.NoteID != 0 {
+					r.out(w, footnoteRef(r.FootnoteAnchorPrefix, node))
+					break
+				}
+				attrs = appendLinkAttrs(attrs, r.Flags, dest)
+				if len(node.LinkData.Title) > 0 {
+					var titleBuff bytes.Buffer
+					titleBuff.WriteString("title=\"")
+					escapeHTML(&titleBuff, node.LinkData.Title)
+					titleBuff.WriteByte('"')
+					attrs = append(attrs, titleBuff.String())
+				}
+				r.tag(w, aTag, attrs)
+			} else {
+				if node.NoteID != 0 {
+					break
+				}
+				r.out(w, aCloseTag)
+			}
+		}
+	case Image:
+		if r.Flags&SkipImages != 0 {
+			return SkipChildren
+		}
+		if entering {
+			dest := node.LinkData.Destination
+			dest = r.addAbsPrefix(dest)
+			if r.disableTags == 0 {
+				//if options.safe && potentiallyUnsafe(dest) {
+				//out(w, `<img src="" alt="`)
+				//} else {
+				r.out(w, []byte(`<img src="`))
+				escLink(w, dest)
+				r.out(w, []byte(`" alt="`))
+				//}
+			}
+			r.disableTags++
+		} else {
+			r.disableTags--
+			if r.disableTags == 0 {
+				if node.LinkData.Title != nil {
+					r.out(w, []byte(`" title="`))
+					escapeHTML(w, node.LinkData.Title)
+				}
+				r.out(w, []byte(`" />`))
+			}
+		}
+	case Code:
+		r.out(w, codeTag)
+		escapeHTML(w, node.Literal)
+		r.out(w, codeCloseTag)
+	case Document:
+		break
+	case Paragraph:
+		if skipParagraphTags(node) {
+			break
+		}
+		if entering {
+			// TODO: untangle this clusterfuck about when the newlines need
+			// to be added and when not.
+			if node.Prev != nil {
+				switch node.Prev.Type {
+				case HTMLBlock, List, Paragraph, Heading, CodeBlock, BlockQuote, HorizontalRule:
+					r.cr(w)
+				}
+			}
+			if node.Parent.Type == BlockQuote && node.Prev == nil {
+				r.cr(w)
+			}
+			r.out(w, pTag)
+		} else {
+			r.out(w, pCloseTag)
+			if !(node.Parent.Type == Item && node.Next == nil) {
+				r.cr(w)
+			}
+		}
+	case BlockQuote:
+		if entering {
+			r.cr(w)
+			r.out(w, blockquoteTag)
+		} else {
+			r.out(w, blockquoteCloseTag)
+			r.cr(w)
+		}
+	case HTMLBlock:
+		if r.Flags&SkipHTML != 0 {
+			break
+		}
+		r.cr(w)
+		r.out(w, node.Literal)
+		r.cr(w)
+	case Heading:
+		headingLevel := r.HTMLRendererParameters.HeadingLevelOffset + node.Level
+		openTag, closeTag := headingTagsFromLevel(headingLevel)
+		if entering {
+			if node.IsTitleblock {
+				attrs = append(attrs, `class="title"`)
+			}
+			if node.HeadingID != "" {
+				id := r.ensureUniqueHeadingID(node.HeadingID)
+				if r.HeadingIDPrefix != "" {
+					id = r.HeadingIDPrefix + id
+				}
+				if r.HeadingIDSuffix != "" {
+					id = id + r.HeadingIDSuffix
+				}
+				attrs = append(attrs, fmt.Sprintf(`id="%s"`, id))
+			}
+			r.cr(w)
+			r.tag(w, openTag, attrs)
+		} else {
+			r.out(w, closeTag)
+			if !(node.Parent.Type == Item && node.Next == nil) {
+				r.cr(w)
+			}
+		}
+	case HorizontalRule:
+		r.cr(w)
+		r.outHRTag(w)
+		r.cr(w)
+	case List:
+		openTag := ulTag
+		closeTag := ulCloseTag
+		if node.ListFlags&ListTypeOrdered != 0 {
+			openTag = olTag
+			closeTag = olCloseTag
+		}
+		if node.ListFlags&ListTypeDefinition != 0 {
+			openTag = dlTag
+			closeTag = dlCloseTag
+		}
+		if entering {
+			if node.IsFootnotesList {
+				r.out(w, footnotesDivBytes)
+				r.outHRTag(w)
+				r.cr(w)
+			}
+			r.cr(w)
+			if node.Parent.Type == Item && node.Parent.Parent.Tight {
+				r.cr(w)
+			}
+			r.tag(w, openTag[:len(openTag)-1], attrs)
+			r.cr(w)
+		} else {
+			r.out(w, closeTag)
+			//cr(w)
+			//if node.parent.Type != Item {
+			//	cr(w)
+			//}
+			if node.Parent.Type == Item && node.Next != nil {
+				r.cr(w)
+			}
+			if node.Parent.Type == Document || node.Parent.Type == BlockQuote {
+				r.cr(w)
+			}
+			if node.IsFootnotesList {
+				r.out(w, footnotesCloseDivBytes)
+			}
+		}
+	case Item:
+		openTag := liTag
+		closeTag := liCloseTag
+		if node.ListFlags&ListTypeDefinition != 0 {
+			openTag = ddTag
+			closeTag = ddCloseTag
+		}
+		if node.ListFlags&ListTypeTerm != 0 {
+			openTag = dtTag
+			closeTag = dtCloseTag
+		}
+		if entering {
+			if itemOpenCR(node) {
+				r.cr(w)
+			}
+			if node.ListData.RefLink != nil {
+				slug := slugify(node.ListData.RefLink)
+				r.out(w, footnoteItem(r.FootnoteAnchorPrefix, slug))
+				break
+			}
+			r.out(w, openTag)
+		} else {
+			if node.ListData.RefLink != nil {
+				slug := slugify(node.ListData.RefLink)
+				if r.Flags&FootnoteReturnLinks != 0 {
+					r.out(w, footnoteReturnLink(r.FootnoteAnchorPrefix, r.FootnoteReturnLinkContents, slug))
+				}
+			}
+			r.out(w, closeTag)
+			r.cr(w)
+		}
+	case CodeBlock:
+		attrs = appendLanguageAttr(attrs, node.Info)
+		r.cr(w)
+		r.out(w, preTag)
+		r.tag(w, codeTag[:len(codeTag)-1], attrs)
+		escapeHTML(w, node.Literal)
+		r.out(w, codeCloseTag)
+		r.out(w, preCloseTag)
+		if node.Parent.Type != Item {
+			r.cr(w)
+		}
+	case Table:
+		if entering {
+			r.cr(w)
+			r.out(w, tableTag)
+		} else {
+			r.out(w, tableCloseTag)
+			r.cr(w)
+		}
+	case TableCell:
+		openTag := tdTag
+		closeTag := tdCloseTag
+		if node.IsHeader {
+			openTag = thTag
+			closeTag = thCloseTag
+		}
+		if entering {
+			align := cellAlignment(node.Align)
+			if align != "" {
+				attrs = append(attrs, fmt.Sprintf(`align="%s"`, align))
+			}
+			if node.Prev == nil {
+				r.cr(w)
+			}
+			r.tag(w, openTag, attrs)
+		} else {
+			r.out(w, closeTag)
+			r.cr(w)
+		}
+	case TableHead:
+		if entering {
+			r.cr(w)
+			r.out(w, theadTag)
+		} else {
+			r.out(w, theadCloseTag)
+			r.cr(w)
+		}
+	case TableBody:
+		if entering {
+			r.cr(w)
+			r.out(w, tbodyTag)
+			// XXX: this is to adhere to a rather silly test. Should fix test.
+			if node.FirstChild == nil {
+				r.cr(w)
+			}
+		} else {
+			r.out(w, tbodyCloseTag)
+			r.cr(w)
+		}
+	case TableRow:
+		if entering {
+			r.cr(w)
+			r.out(w, trTag)
+		} else {
+			r.out(w, trCloseTag)
+			r.cr(w)
+		}
+	default:
+		panic("Unknown node type " + node.Type.String())
+	}
+	return GoToNext
+}
+
+// RenderHeader writes HTML document preamble and TOC if requested.
+func (r *HTMLRenderer) RenderHeader(w io.Writer, ast *Node) {
+	r.writeDocumentHeader(w)
+	if r.Flags&TOC != 0 {
+		r.writeTOC(w, ast)
+	}
+}
+
+// RenderFooter writes HTML document footer.
+func (r *HTMLRenderer) RenderFooter(w io.Writer, ast *Node) {
+	if r.Flags&CompletePage == 0 {
+		return
+	}
+	io.WriteString(w, "\n</body>\n</html>\n")
+}
+
+func (r *HTMLRenderer) writeDocumentHeader(w io.Writer) {
+	if r.Flags&CompletePage == 0 {
+		return
+	}
+	ending := ""
+	if r.Flags&UseXHTML != 0 {
+		io.WriteString(w, "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" ")
+		io.WriteString(w, "\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n")
+		io.WriteString(w, "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n")
+		ending = " /"
+	} else {
+		io.WriteString(w, "<!DOCTYPE html>\n")
+		io.WriteString(w, "<html>\n")
+	}
+	io.WriteString(w, "<head>\n")
+	io.WriteString(w, "  <title>")
+	if r.Flags&Smartypants != 0 {
+		r.sr.Process(w, []byte(r.Title))
+	} else {
+		escapeHTML(w, []byte(r.Title))
+	}
+	io.WriteString(w, "</title>\n")
+	io.WriteString(w, "  <meta name=\"GENERATOR\" content=\"Blackfriday Markdown Processor v")
+	io.WriteString(w, Version)
+	io.WriteString(w, "\"")
+	io.WriteString(w, ending)
+	io.WriteString(w, ">\n")
+	io.WriteString(w, "  <meta charset=\"utf-8\"")
+	io.WriteString(w, ending)
+	io.WriteString(w, ">\n")
+	if r.CSS != "" {
+		io.WriteString(w, "  <link rel=\"stylesheet\" type=\"text/css\" href=\"")
+		escapeHTML(w, []byte(r.CSS))
+		io.WriteString(w, "\"")
+		io.WriteString(w, ending)
+		io.WriteString(w, ">\n")
+	}
+	if r.Icon != "" {
+		io.WriteString(w, "  <link rel=\"icon\" type=\"image/x-icon\" href=\"")
+		escapeHTML(w, []byte(r.Icon))
+		io.WriteString(w, "\"")
+		io.WriteString(w, ending)
+		io.WriteString(w, ">\n")
+	}
+	io.WriteString(w, "</head>\n")
+	io.WriteString(w, "<body>\n\n")
+}
+
+func (r *HTMLRenderer) writeTOC(w io.Writer, ast *Node) {
+	buf := bytes.Buffer{}
+
+	inHeading := false
+	tocLevel := 0
+	headingCount := 0
+
+	ast.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Heading && !node.HeadingData.IsTitleblock {
+			inHeading = entering
+			if entering {
+				node.HeadingID = fmt.Sprintf("toc_%d", headingCount)
+				if node.Level == tocLevel {
+					buf.WriteString("</li>\n\n<li>")
+				} else if node.Level < tocLevel {
+					for node.Level < tocLevel {
+						tocLevel--
+						buf.WriteString("</li>\n</ul>")
+					}
+					buf.WriteString("</li>\n\n<li>")
+				} else {
+					for node.Level > tocLevel {
+						tocLevel++
+						buf.WriteString("\n<ul>\n<li>")
+					}
+				}
+
+				fmt.Fprintf(&buf, `<a href="#toc_%d">`, headingCount)
+				headingCount++
+			} else {
+				buf.WriteString("</a>")
+			}
+			return GoToNext
+		}
+
+		if inHeading {
+			return r.RenderNode(&buf, node, entering)
+		}
+
+		return GoToNext
+	})
+
+	for ; tocLevel > 0; tocLevel-- {
+		buf.WriteString("</li>\n</ul>")
+	}
+
+	if buf.Len() > 0 {
+		io.WriteString(w, "<nav>\n")
+		w.Write(buf.Bytes())
+		io.WriteString(w, "\n\n</nav>\n")
+	}
+	r.lastOutputLen = buf.Len()
+}

vendor/github.com/russross/blackfriday/v2/markdown.go

@@ -0,0 +1,950 @@
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+	"unicode/utf8"
+)
+
+//
+// Markdown parsing and processing
+//
+
+// Version string of the package. Appears in the rendered document when
+// CompletePage flag is on.
+const Version = "2.0"
+
+// Extensions is a bitwise or'ed collection of enabled Blackfriday's
+// extensions.
+type Extensions int
+
+// These are the supported markdown parsing extensions.
+// OR these values together to select multiple extensions.
+const (
+	NoExtensions           Extensions = 0
+	NoIntraEmphasis        Extensions = 1 << iota // Ignore emphasis markers inside words
+	Tables                                        // Render tables
+	FencedCode                                    // Render fenced code blocks
+	Autolink                                      // Detect embedded URLs that are not explicitly marked
+	Strikethrough                                 // Strikethrough text using ~~test~~
+	LaxHTMLBlocks                                 // Loosen up HTML block parsing rules
+	SpaceHeadings                                 // Be strict about prefix heading rules
+	HardLineBreak                                 // Translate newlines into line breaks
+	TabSizeEight                                  // Expand tabs to eight spaces instead of four
+	Footnotes                                     // Pandoc-style footnotes
+	NoEmptyLineBeforeBlock                        // No need to insert an empty line to start a (code, quote, ordered list, unordered list) block
+	HeadingIDs                                    // specify heading IDs  with {#id}
+	Titleblock                                    // Titleblock ala pandoc
+	AutoHeadingIDs                                // Create the heading ID from the text
+	BackslashLineBreak                            // Translate trailing backslashes into line breaks
+	DefinitionLists                               // Render definition lists
+
+	CommonHTMLFlags HTMLFlags = UseXHTML | Smartypants |
+		SmartypantsFractions | SmartypantsDashes | SmartypantsLatexDashes
+
+	CommonExtensions Extensions = NoIntraEmphasis | Tables | FencedCode |
+		Autolink | Strikethrough | SpaceHeadings | HeadingIDs |
+		BackslashLineBreak | DefinitionLists
+)
+
+// ListType contains bitwise or'ed flags for list and list item objects.
+type ListType int
+
+// These are the possible flag values for the ListItem renderer.
+// Multiple flag values may be ORed together.
+// These are mostly of interest if you are writing a new output format.
+const (
+	ListTypeOrdered ListType = 1 << iota
+	ListTypeDefinition
+	ListTypeTerm
+
+	ListItemContainsBlock
+	ListItemBeginningOfList // TODO: figure out if this is of any use now
+	ListItemEndOfList
+)
+
+// CellAlignFlags holds a type of alignment in a table cell.
+type CellAlignFlags int
+
+// These are the possible flag values for the table cell renderer.
+// Only a single one of these values will be used; they are not ORed together.
+// These are mostly of interest if you are writing a new output format.
+const (
+	TableAlignmentLeft CellAlignFlags = 1 << iota
+	TableAlignmentRight
+	TableAlignmentCenter = (TableAlignmentLeft | TableAlignmentRight)
+)
+
+// The size of a tab stop.
+const (
+	TabSizeDefault = 4
+	TabSizeDouble  = 8
+)
+
+// blockTags is a set of tags that are recognized as HTML block tags.
+// Any of these can be included in markdown text without special escaping.
+var blockTags = map[string]struct{}{
+	"blockquote": {},
+	"del":        {},
+	"div":        {},
+	"dl":         {},
+	"fieldset":   {},
+	"form":       {},
+	"h1":         {},
+	"h2":         {},
+	"h3":         {},
+	"h4":         {},
+	"h5":         {},
+	"h6":         {},
+	"iframe":     {},
+	"ins":        {},
+	"math":       {},
+	"noscript":   {},
+	"ol":         {},
+	"pre":        {},
+	"p":          {},
+	"script":     {},
+	"style":      {},
+	"table":      {},
+	"ul":         {},
+
+	// HTML5
+	"address":    {},
+	"article":    {},
+	"aside":      {},
+	"canvas":     {},
+	"figcaption": {},
+	"figure":     {},
+	"footer":     {},
+	"header":     {},
+	"hgroup":     {},
+	"main":       {},
+	"nav":        {},
+	"output":     {},
+	"progress":   {},
+	"section":    {},
+	"video":      {},
+}
+
+// Renderer is the rendering interface. This is mostly of interest if you are
+// implementing a new rendering format.
+//
+// Only an HTML implementation is provided in this repository, see the README
+// for external implementations.
+type Renderer interface {
+	// RenderNode is the main rendering method. It will be called once for
+	// every leaf node and twice for every non-leaf node (first with
+	// entering=true, then with entering=false). The method should write its
+	// rendition of the node to the supplied writer w.
+	RenderNode(w io.Writer, node *Node, entering bool) WalkStatus
+
+	// RenderHeader is a method that allows the renderer to produce some
+	// content preceding the main body of the output document. The header is
+	// understood in the broad sense here. For example, the default HTML
+	// renderer will write not only the HTML document preamble, but also the
+	// table of contents if it was requested.
+	//
+	// The method will be passed an entire document tree, in case a particular
+	// implementation needs to inspect it to produce output.
+	//
+	// The output should be written to the supplied writer w. If your
+	// implementation has no header to write, supply an empty implementation.
+	RenderHeader(w io.Writer, ast *Node)
+
+	// RenderFooter is a symmetric counterpart of RenderHeader.
+	RenderFooter(w io.Writer, ast *Node)
+}
+
+// Callback functions for inline parsing. One such function is defined
+// for each character that triggers a response when parsing inline data.
+type inlineParser func(p *Markdown, data []byte, offset int) (int, *Node)
+
+// Markdown is a type that holds extensions and the runtime state used by
+// Parse, and the renderer. You can not use it directly, construct it with New.
+type Markdown struct {
+	renderer          Renderer
+	referenceOverride ReferenceOverrideFunc
+	refs              map[string]*reference
+	inlineCallback    [256]inlineParser
+	extensions        Extensions
+	nesting           int
+	maxNesting        int
+	insideLink        bool
+
+	// Footnotes need to be ordered as well as available to quickly check for
+	// presence. If a ref is also a footnote, it's stored both in refs and here
+	// in notes. Slice is nil if footnotes not enabled.
+	notes []*reference
+
+	doc                  *Node
+	tip                  *Node // = doc
+	oldTip               *Node
+	lastMatchedContainer *Node // = doc
+	allClosed            bool
+}
+
+func (p *Markdown) getRef(refid string) (ref *reference, found bool) {
+	if p.referenceOverride != nil {
+		r, overridden := p.referenceOverride(refid)
+		if overridden {
+			if r == nil {
+				return nil, false
+			}
+			return &reference{
+				link:     []byte(r.Link),
+				title:    []byte(r.Title),
+				noteID:   0,
+				hasBlock: false,
+				text:     []byte(r.Text)}, true
+		}
+	}
+	// refs are case insensitive
+	ref, found = p.refs[strings.ToLower(refid)]
+	return ref, found
+}
+
+func (p *Markdown) finalize(block *Node) {
+	above := block.Parent
+	block.open = false
+	p.tip = above
+}
+
+func (p *Markdown) addChild(node NodeType, offset uint32) *Node {
+	return p.addExistingChild(NewNode(node), offset)
+}
+
+func (p *Markdown) addExistingChild(node *Node, offset uint32) *Node {
+	for !p.tip.canContain(node.Type) {
+		p.finalize(p.tip)
+	}
+	p.tip.AppendChild(node)
+	p.tip = node
+	return node
+}
+
+func (p *Markdown) closeUnmatchedBlocks() {
+	if !p.allClosed {
+		for p.oldTip != p.lastMatchedContainer {
+			parent := p.oldTip.Parent
+			p.finalize(p.oldTip)
+			p.oldTip = parent
+		}
+		p.allClosed = true
+	}
+}
+
+//
+//
+// Public interface
+//
+//
+
+// Reference represents the details of a link.
+// See the documentation in Options for more details on use-case.
+type Reference struct {
+	// Link is usually the URL the reference points to.
+	Link string
+	// Title is the alternate text describing the link in more detail.
+	Title string
+	// Text is the optional text to override the ref with if the syntax used was
+	// [refid][]
+	Text string
+}
+
+// ReferenceOverrideFunc is expected to be called with a reference string and
+// return either a valid Reference type that the reference string maps to or
+// nil. If overridden is false, the default reference logic will be executed.
+// See the documentation in Options for more details on use-case.
+type ReferenceOverrideFunc func(reference string) (ref *Reference, overridden bool)
+
+// New constructs a Markdown processor. You can use the same With* functions as
+// for Run() to customize parser's behavior and the renderer.
+func New(opts ...Option) *Markdown {
+	var p Markdown
+	for _, opt := range opts {
+		opt(&p)
+	}
+	p.refs = make(map[string]*reference)
+	p.maxNesting = 16
+	p.insideLink = false
+	docNode := NewNode(Document)
+	p.doc = docNode
+	p.tip = docNode
+	p.oldTip = docNode
+	p.lastMatchedContainer = docNode
+	p.allClosed = true
+	// register inline parsers
+	p.inlineCallback[' '] = maybeLineBreak
+	p.inlineCallback['*'] = emphasis
+	p.inlineCallback['_'] = emphasis
+	if p.extensions&Strikethrough != 0 {
+		p.inlineCallback['~'] = emphasis
+	}
+	p.inlineCallback['`'] = codeSpan
+	p.inlineCallback['\n'] = lineBreak
+	p.inlineCallback['['] = link
+	p.inlineCallback['<'] = leftAngle
+	p.inlineCallback['\\'] = escape
+	p.inlineCallback['&'] = entity
+	p.inlineCallback['!'] = maybeImage
+	p.inlineCallback['^'] = maybeInlineFootnote
+	if p.extensions&Autolink != 0 {
+		p.inlineCallback['h'] = maybeAutoLink
+		p.inlineCallback['m'] = maybeAutoLink
+		p.inlineCallback['f'] = maybeAutoLink
+		p.inlineCallback['H'] = maybeAutoLink
+		p.inlineCallback['M'] = maybeAutoLink
+		p.inlineCallback['F'] = maybeAutoLink
+	}
+	if p.extensions&Footnotes != 0 {
+		p.notes = make([]*reference, 0)
+	}
+	return &p
+}
+
+// Option customizes the Markdown processor's default behavior.
+type Option func(*Markdown)
+
+// WithRenderer allows you to override the default renderer.
+func WithRenderer(r Renderer) Option {
+	return func(p *Markdown) {
+		p.renderer = r
+	}
+}
+
+// WithExtensions allows you to pick some of the many extensions provided by
+// Blackfriday. You can bitwise OR them.
+func WithExtensions(e Extensions) Option {
+	return func(p *Markdown) {
+		p.extensions = e
+	}
+}
+
+// WithNoExtensions turns off all extensions and custom behavior.
+func WithNoExtensions() Option {
+	return func(p *Markdown) {
+		p.extensions = NoExtensions
+		p.renderer = NewHTMLRenderer(HTMLRendererParameters{
+			Flags: HTMLFlagsNone,
+		})
+	}
+}
+
+// WithRefOverride sets an optional function callback that is called every
+// time a reference is resolved.
+//
+// In Markdown, the link reference syntax can be made to resolve a link to
+// a reference instead of an inline URL, in one of the following ways:
+//
+//  * [link text][refid]
+//  * [refid][]
+//
+// Usually, the refid is defined at the bottom of the Markdown document. If
+// this override function is provided, the refid is passed to the override
+// function first, before consulting the defined refids at the bottom. If
+// the override function indicates an override did not occur, the refids at
+// the bottom will be used to fill in the link details.
+func WithRefOverride(o ReferenceOverrideFunc) Option {
+	return func(p *Markdown) {
+		p.referenceOverride = o
+	}
+}
+
+// Run is the main entry point to Blackfriday. It parses and renders a
+// block of markdown-encoded text.
+//
+// The simplest invocation of Run takes one argument, input:
+//     output := Run(input)
+// This will parse the input with CommonExtensions enabled and render it with
+// the default HTMLRenderer (with CommonHTMLFlags).
+//
+// Variadic arguments opts can customize the default behavior. Since Markdown
+// type does not contain exported fields, you can not use it directly. Instead,
+// use the With* functions. For example, this will call the most basic
+// functionality, with no extensions:
+//     output := Run(input, WithNoExtensions())
+//
+// You can use any number of With* arguments, even contradicting ones. They
+// will be applied in order of appearance and the latter will override the
+// former:
+//     output := Run(input, WithNoExtensions(), WithExtensions(exts),
+//         WithRenderer(yourRenderer))
+func Run(input []byte, opts ...Option) []byte {
+	r := NewHTMLRenderer(HTMLRendererParameters{
+		Flags: CommonHTMLFlags,
+	})
+	optList := []Option{WithRenderer(r), WithExtensions(CommonExtensions)}
+	optList = append(optList, opts...)
+	parser := New(optList...)
+	ast := parser.Parse(input)
+	var buf bytes.Buffer
+	parser.renderer.RenderHeader(&buf, ast)
+	ast.Walk(func(node *Node, entering bool) WalkStatus {
+		return parser.renderer.RenderNode(&buf, node, entering)
+	})
+	parser.renderer.RenderFooter(&buf, ast)
+	return buf.Bytes()
+}
+
+// Parse is an entry point to the parsing part of Blackfriday. It takes an
+// input markdown document and produces a syntax tree for its contents. This
+// tree can then be rendered with a default or custom renderer, or
+// analyzed/transformed by the caller to whatever non-standard needs they have.
+// The return value is the root node of the syntax tree.
+func (p *Markdown) Parse(input []byte) *Node {
+	p.block(input)
+	// Walk the tree and finish up some of unfinished blocks
+	for p.tip != nil {
+		p.finalize(p.tip)
+	}
+	// Walk the tree again and process inline markdown in each block
+	p.doc.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Paragraph || node.Type == Heading || node.Type == TableCell {
+			p.inline(node, node.content)
+			node.content = nil
+		}
+		return GoToNext
+	})
+	p.parseRefsToAST()
+	return p.doc
+}
+
+func (p *Markdown) parseRefsToAST() {
+	if p.extensions&Footnotes == 0 || len(p.notes) == 0 {
+		return
+	}
+	p.tip = p.doc
+	block := p.addBlock(List, nil)
+	block.IsFootnotesList = true
+	block.ListFlags = ListTypeOrdered
+	flags := ListItemBeginningOfList
+	// Note: this loop is intentionally explicit, not range-form. This is
+	// because the body of the loop will append nested footnotes to p.notes and
+	// we need to process those late additions. Range form would only walk over
+	// the fixed initial set.
+	for i := 0; i < len(p.notes); i++ {
+		ref := p.notes[i]
+		p.addExistingChild(ref.footnote, 0)
+		block := ref.footnote
+		block.ListFlags = flags | ListTypeOrdered
+		block.RefLink = ref.link
+		if ref.hasBlock {
+			flags |= ListItemContainsBlock
+			p.block(ref.title)
+		} else {
+			p.inline(block, ref.title)
+		}
+		flags &^= ListItemBeginningOfList | ListItemContainsBlock
+	}
+	above := block.Parent
+	finalizeList(block)
+	p.tip = above
+	block.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Paragraph || node.Type == Heading {
+			p.inline(node, node.content)
+			node.content = nil
+		}
+		return GoToNext
+	})
+}
+
+//
+// Link references
+//
+// This section implements support for references that (usually) appear
+// as footnotes in a document, and can be referenced anywhere in the document.
+// The basic format is:
+//
+//    [1]: http://www.google.com/ "Google"
+//    [2]: http://www.github.com/ "Github"
+//
+// Anywhere in the document, the reference can be linked by referring to its
+// label, i.e., 1 and 2 in this example, as in:
+//
+//    This library is hosted on [Github][2], a git hosting site.
+//
+// Actual footnotes as specified in Pandoc and supported by some other Markdown
+// libraries such as php-markdown are also taken care of. They look like this:
+//
+//    This sentence needs a bit of further explanation.[^note]
+//
+//    [^note]: This is the explanation.
+//
+// Footnotes should be placed at the end of the document in an ordered list.
+// Finally, there are inline footnotes such as:
+//
+//    Inline footnotes^[Also supported.] provide a quick inline explanation,
+//    but are rendered at the bottom of the document.
+//
+
+// reference holds all information necessary for a reference-style links or
+// footnotes.
+//
+// Consider this markdown with reference-style links:
+//
+//     [link][ref]
+//
+//     [ref]: /url/ "tooltip title"
+//
+// It will be ultimately converted to this HTML:
+//
+//     <p><a href=\"/url/\" title=\"title\">link</a></p>
+//
+// And a reference structure will be populated as follows:
+//
+//     p.refs["ref"] = &reference{
+//         link: "/url/",
+//         title: "tooltip title",
+//     }
+//
+// Alternatively, reference can contain information about a footnote. Consider
+// this markdown:
+//
+//     Text needing a footnote.[^a]
+//
+//     [^a]: This is the note
+//
+// A reference structure will be populated as follows:
+//
+//     p.refs["a"] = &reference{
+//         link: "a",
+//         title: "This is the note",
+//         noteID: <some positive int>,
+//     }
+//
+// TODO: As you can see, it begs for splitting into two dedicated structures
+// for refs and for footnotes.
+type reference struct {
+	link     []byte
+	title    []byte
+	noteID   int // 0 if not a footnote ref
+	hasBlock bool
+	footnote *Node // a link to the Item node within a list of footnotes
+
+	text []byte // only gets populated by refOverride feature with Reference.Text
+}
+
+func (r *reference) String() string {
+	return fmt.Sprintf("{link: %q, title: %q, text: %q, noteID: %d, hasBlock: %v}",
+		r.link, r.title, r.text, r.noteID, r.hasBlock)
+}
+
+// Check whether or not data starts with a reference link.
+// If so, it is parsed and stored in the list of references
+// (in the render struct).
+// Returns the number of bytes to skip to move past it,
+// or zero if the first line is not a reference.
+func isReference(p *Markdown, data []byte, tabSize int) int {
+	// up to 3 optional leading spaces
+	if len(data) < 4 {
+		return 0
+	}
+	i := 0
+	for i < 3 && data[i] == ' ' {
+		i++
+	}
+
+	noteID := 0
+
+	// id part: anything but a newline between brackets
+	if data[i] != '[' {
+		return 0
+	}
+	i++
+	if p.extensions&Footnotes != 0 {
+		if i < len(data) && data[i] == '^' {
+			// we can set it to anything here because the proper noteIds will
+			// be assigned later during the second pass. It just has to be != 0
+			noteID = 1
+			i++
+		}
+	}
+	idOffset := i
+	for i < len(data) && data[i] != '\n' && data[i] != '\r' && data[i] != ']' {
+		i++
+	}
+	if i >= len(data) || data[i] != ']' {
+		return 0
+	}
+	idEnd := i
+	// footnotes can have empty ID, like this: [^], but a reference can not be
+	// empty like this: []. Break early if it's not a footnote and there's no ID
+	if noteID == 0 && idOffset == idEnd {
+		return 0
+	}
+	// spacer: colon (space | tab)* newline? (space | tab)*
+	i++
+	if i >= len(data) || data[i] != ':' {
+		return 0
+	}
+	i++
+	for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+		i++
+	}
+	if i < len(data) && (data[i] == '\n' || data[i] == '\r') {
+		i++
+		if i < len(data) && data[i] == '\n' && data[i-1] == '\r' {
+			i++
+		}
+	}
+	for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+		i++
+	}
+	if i >= len(data) {
+		return 0
+	}
+
+	var (
+		linkOffset, linkEnd   int
+		titleOffset, titleEnd int
+		lineEnd               int
+		raw                   []byte
+		hasBlock              bool
+	)
+
+	if p.extensions&Footnotes != 0 && noteID != 0 {
+		linkOffset, linkEnd, raw, hasBlock = scanFootnote(p, data, i, tabSize)
+		lineEnd = linkEnd
+	} else {
+		linkOffset, linkEnd, titleOffset, titleEnd, lineEnd = scanLinkRef(p, data, i)
+	}
+	if lineEnd == 0 {
+		return 0
+	}
+
+	// a valid ref has been found
+
+	ref := &reference{
+		noteID:   noteID,
+		hasBlock: hasBlock,
+	}
+
+	if noteID > 0 {
+		// reusing the link field for the id since footnotes don't have links
+		ref.link = data[idOffset:idEnd]
+		// if footnote, it's not really a title, it's the contained text
+		ref.title = raw
+	} else {
+		ref.link = data[linkOffset:linkEnd]
+		ref.title = data[titleOffset:titleEnd]
+	}
+
+	// id matches are case-insensitive
+	id := string(bytes.ToLower(data[idOffset:idEnd]))
+
+	p.refs[id] = ref
+
+	return lineEnd
+}
+
+func scanLinkRef(p *Markdown, data []byte, i int) (linkOffset, linkEnd, titleOffset, titleEnd, lineEnd int) {
+	// link: whitespace-free sequence, optionally between angle brackets
+	if data[i] == '<' {
+		i++
+	}
+	linkOffset = i
+	for i < len(data) && data[i] != ' ' && data[i] != '\t' && data[i] != '\n' && data[i] != '\r' {
+		i++
+	}
+	linkEnd = i
+	if data[linkOffset] == '<' && data[linkEnd-1] == '>' {
+		linkOffset++
+		linkEnd--
+	}
+
+	// optional spacer: (space | tab)* (newline | '\'' | '"' | '(' )
+	for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+		i++
+	}
+	if i < len(data) && data[i] != '\n' && data[i] != '\r' && data[i] != '\'' && data[i] != '"' && data[i] != '(' {
+		return
+	}
+
+	// compute end-of-line
+	if i >= len(data) || data[i] == '\r' || data[i] == '\n' {
+		lineEnd = i
+	}
+	if i+1 < len(data) && data[i] == '\r' && data[i+1] == '\n' {
+		lineEnd++
+	}
+
+	// optional (space|tab)* spacer after a newline
+	if lineEnd > 0 {
+		i = lineEnd + 1
+		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+			i++
+		}
+	}
+
+	// optional title: any non-newline sequence enclosed in '"() alone on its line
+	if i+1 < len(data) && (data[i] == '\'' || data[i] == '"' || data[i] == '(') {
+		i++
+		titleOffset = i
+
+		// look for EOL
+		for i < len(data) && data[i] != '\n' && data[i] != '\r' {
+			i++
+		}
+		if i+1 < len(data) && data[i] == '\n' && data[i+1] == '\r' {
+			titleEnd = i + 1
+		} else {
+			titleEnd = i
+		}
+
+		// step back
+		i--
+		for i > titleOffset && (data[i] == ' ' || data[i] == '\t') {
+			i--
+		}
+		if i > titleOffset && (data[i] == '\'' || data[i] == '"' || data[i] == ')') {
+			lineEnd = titleEnd
+			titleEnd = i
+		}
+	}
+
+	return
+}
+
+// The first bit of this logic is the same as Parser.listItem, but the rest
+// is much simpler. This function simply finds the entire block and shifts it
+// over by one tab if it is indeed a block (just returns the line if it's not).
+// blockEnd is the end of the section in the input buffer, and contents is the
+// extracted text that was shifted over one tab. It will need to be rendered at
+// the end of the document.
+func scanFootnote(p *Markdown, data []byte, i, indentSize int) (blockStart, blockEnd int, contents []byte, hasBlock bool) {
+	if i == 0 || len(data) == 0 {
+		return
+	}
+
+	// skip leading whitespace on first line
+	for i < len(data) && data[i] == ' ' {
+		i++
+	}
+
+	blockStart = i
+
+	// find the end of the line
+	blockEnd = i
+	for i < len(data) && data[i-1] != '\n' {
+		i++
+	}
+
+	// get working buffer
+	var raw bytes.Buffer
+
+	// put the first line into the working buffer
+	raw.Write(data[blockEnd:i])
+	blockEnd = i
+
+	// process the following lines
+	containsBlankLine := false
+
+gatherLines:
+	for blockEnd < len(data) {
+		i++
+
+		// find the end of this line
+		for i < len(data) && data[i-1] != '\n' {
+			i++
+		}
+
+		// if it is an empty line, guess that it is part of this item
+		// and move on to the next line
+		if p.isEmpty(data[blockEnd:i]) > 0 {
+			containsBlankLine = true
+			blockEnd = i
+			continue
+		}
+
+		n := 0
+		if n = isIndented(data[blockEnd:i], indentSize); n == 0 {
+			// this is the end of the block.
+			// we don't want to include this last line in the index.
+			break gatherLines
+		}
+
+		// if there were blank lines before this one, insert a new one now
+		if containsBlankLine {
+			raw.WriteByte('\n')
+			containsBlankLine = false
+		}
+
+		// get rid of that first tab, write to buffer
+		raw.Write(data[blockEnd+n : i])
+		hasBlock = true
+
+		blockEnd = i
+	}
+
+	if data[blockEnd-1] != '\n' {
+		raw.WriteByte('\n')
+	}
+
+	contents = raw.Bytes()
+
+	return
+}
+
+//
+//
+// Miscellaneous helper functions
+//
+//
+
+// Test if a character is a punctuation symbol.
+// Taken from a private function in regexp in the stdlib.
+func ispunct(c byte) bool {
+	for _, r := range []byte("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~") {
+		if c == r {
+			return true
+		}
+	}
+	return false
+}
+
+// Test if a character is a whitespace character.
+func isspace(c byte) bool {
+	return ishorizontalspace(c) || isverticalspace(c)
+}
+
+// Test if a character is a horizontal whitespace character.
+func ishorizontalspace(c byte) bool {
+	return c == ' ' || c == '\t'
+}
+
+// Test if a character is a vertical character.
+func isverticalspace(c byte) bool {
+	return c == '\n' || c == '\r' || c == '\f' || c == '\v'
+}
+
+// Test if a character is letter.
+func isletter(c byte) bool {
+	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
+}
+
+// Test if a character is a letter or a digit.
+// TODO: check when this is looking for ASCII alnum and when it should use unicode
+func isalnum(c byte) bool {
+	return (c >= '0' && c <= '9') || isletter(c)
+}
+
+// Replace tab characters with spaces, aligning to the next TAB_SIZE column.
+// always ends output with a newline
+func expandTabs(out *bytes.Buffer, line []byte, tabSize int) {
+	// first, check for common cases: no tabs, or only tabs at beginning of line
+	i, prefix := 0, 0
+	slowcase := false
+	for i = 0; i < len(line); i++ {
+		if line[i] == '\t' {
+			if prefix == i {
+				prefix++
+			} else {
+				slowcase = true
+				break
+			}
+		}
+	}
+
+	// no need to decode runes if all tabs are at the beginning of the line
+	if !slowcase {
+		for i = 0; i < prefix*tabSize; i++ {
+			out.WriteByte(' ')
+		}
+		out.Write(line[prefix:])
+		return
+	}
+
+	// the slow case: we need to count runes to figure out how
+	// many spaces to insert for each tab
+	column := 0
+	i = 0
+	for i < len(line) {
+		start := i
+		for i < len(line) && line[i] != '\t' {
+			_, size := utf8.DecodeRune(line[i:])
+			i += size
+			column++
+		}
+
+		if i > start {
+			out.Write(line[start:i])
+		}
+
+		if i >= len(line) {
+			break
+		}
+
+		for {
+			out.WriteByte(' ')
+			column++
+			if column%tabSize == 0 {
+				break
+			}
+		}
+
+		i++
+	}
+}
+
+// Find if a line counts as indented or not.
+// Returns number of characters the indent is (0 = not indented).
+func isIndented(data []byte, indentSize int) int {
+	if len(data) == 0 {
+		return 0
+	}
+	if data[0] == '\t' {
+		return 1
+	}
+	if len(data) < indentSize {
+		return 0
+	}
+	for i := 0; i < indentSize; i++ {
+		if data[i] != ' ' {
+			return 0
+		}
+	}
+	return indentSize
+}
+
+// Create a url-safe slug for fragments
+func slugify(in []byte) []byte {
+	if len(in) == 0 {
+		return in
+	}
+	out := make([]byte, 0, len(in))
+	sym := false
+
+	for _, ch := range in {
+		if isalnum(ch) {
+			sym = false
+			out = append(out, ch)
+		} else if sym {
+			continue
+		} else {
+			out = append(out, '-')
+			sym = true
+		}
+	}
+	var a, b int
+	var ch byte
+	for a, ch = range out {
+		if ch != '-' {
+			break
+		}
+	}
+	for b = len(out) - 1; b > 0; b-- {
+		if out[b] != '-' {
+			break
+		}
+	}
+	return out[a : b+1]
+}

vendor/github.com/russross/blackfriday/v2/node.go

@@ -0,0 +1,354 @@
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+)
+
+// NodeType specifies a type of a single node of a syntax tree. Usually one
+// node (and its type) corresponds to a single markdown feature, e.g. emphasis
+// or code block.
+type NodeType int
+
+// Constants for identifying different types of nodes. See NodeType.
+const (
+	Document NodeType = iota
+	BlockQuote
+	List
+	Item
+	Paragraph
+	Heading
+	HorizontalRule
+	Emph
+	Strong
+	Del
+	Link
+	Image
+	Text
+	HTMLBlock
+	CodeBlock
+	Softbreak
+	Hardbreak
+	Code
+	HTMLSpan
+	Table
+	TableCell
+	TableHead
+	TableBody
+	TableRow
+)
+
+var nodeTypeNames = []string{
+	Document:       "Document",
+	BlockQuote:     "BlockQuote",
+	List:           "List",
+	Item:           "Item",
+	Paragraph:      "Paragraph",
+	Heading:        "Heading",
+	HorizontalRule: "HorizontalRule",
+	Emph:           "Emph",
+	Strong:         "Strong",
+	Del:            "Del",
+	Link:           "Link",
+	Image:          "Image",
+	Text:           "Text",
+	HTMLBlock:      "HTMLBlock",
+	CodeBlock:      "CodeBlock",
+	Softbreak:      "Softbreak",
+	Hardbreak:      "Hardbreak",
+	Code:           "Code",
+	HTMLSpan:       "HTMLSpan",
+	Table:          "Table",
+	TableCell:      "TableCell",
+	TableHead:      "TableHead",
+	TableBody:      "TableBody",
+	TableRow:       "TableRow",
+}
+
+func (t NodeType) String() string {
+	return nodeTypeNames[t]
+}
+
+// ListData contains fields relevant to a List and Item node type.
+type ListData struct {
+	ListFlags       ListType
+	Tight           bool   // Skip <p>s around list item data if true
+	BulletChar      byte   // '*', '+' or '-' in bullet lists
+	Delimiter       byte   // '.' or ')' after the number in ordered lists
+	RefLink         []byte // If not nil, turns this list item into a footnote item and triggers different rendering
+	IsFootnotesList bool   // This is a list of footnotes
+}
+
+// LinkData contains fields relevant to a Link node type.
+type LinkData struct {
+	Destination []byte // Destination is what goes into a href
+	Title       []byte // Title is the tooltip thing that goes in a title attribute
+	NoteID      int    // NoteID contains a serial number of a footnote, zero if it's not a footnote
+	Footnote    *Node  // If it's a footnote, this is a direct link to the footnote Node. Otherwise nil.
+}
+
+// CodeBlockData contains fields relevant to a CodeBlock node type.
+type CodeBlockData struct {
+	IsFenced    bool   // Specifies whether it's a fenced code block or an indented one
+	Info        []byte // This holds the info string
+	FenceChar   byte
+	FenceLength int
+	FenceOffset int
+}
+
+// TableCellData contains fields relevant to a TableCell node type.
+type TableCellData struct {
+	IsHeader bool           // This tells if it's under the header row
+	Align    CellAlignFlags // This holds the value for align attribute
+}
+
+// HeadingData contains fields relevant to a Heading node type.
+type HeadingData struct {
+	Level        int    // This holds the heading level number
+	HeadingID    string // This might hold heading ID, if present
+	IsTitleblock bool   // Specifies whether it's a title block
+}
+
+// Node is a single element in the abstract syntax tree of the parsed document.
+// It holds connections to the structurally neighboring nodes and, for certain
+// types of nodes, additional information that might be needed when rendering.
+type Node struct {
+	Type       NodeType // Determines the type of the node
+	Parent     *Node    // Points to the parent
+	FirstChild *Node    // Points to the first child, if any
+	LastChild  *Node    // Points to the last child, if any
+	Prev       *Node    // Previous sibling; nil if it's the first child
+	Next       *Node    // Next sibling; nil if it's the last child
+
+	Literal []byte // Text contents of the leaf nodes
+
+	HeadingData   // Populated if Type is Heading
+	ListData      // Populated if Type is List
+	CodeBlockData // Populated if Type is CodeBlock
+	LinkData      // Populated if Type is Link
+	TableCellData // Populated if Type is TableCell
+
+	content []byte // Markdown content of the block nodes
+	open    bool   // Specifies an open block node that has not been finished to process yet
+}
+
+// NewNode allocates a node of a specified type.
+func NewNode(typ NodeType) *Node {
+	return &Node{
+		Type: typ,
+		open: true,
+	}
+}
+
+func (n *Node) String() string {
+	ellipsis := ""
+	snippet := n.Literal
+	if len(snippet) > 16 {
+		snippet = snippet[:16]
+		ellipsis = "..."
+	}
+	return fmt.Sprintf("%s: '%s%s'", n.Type, snippet, ellipsis)
+}
+
+// Unlink removes node 'n' from the tree.
+// It panics if the node is nil.
+func (n *Node) Unlink() {
+	if n.Prev != nil {
+		n.Prev.Next = n.Next
+	} else if n.Parent != nil {
+		n.Parent.FirstChild = n.Next
+	}
+	if n.Next != nil {
+		n.Next.Prev = n.Prev
+	} else if n.Parent != nil {
+		n.Parent.LastChild = n.Prev
+	}
+	n.Parent = nil
+	n.Next = nil
+	n.Prev = nil
+}
+
+// AppendChild adds a node 'child' as a child of 'n'.
+// It panics if either node is nil.
+func (n *Node) AppendChild(child *Node) {
+	child.Unlink()
+	child.Parent = n
+	if n.LastChild != nil {
+		n.LastChild.Next = child
+		child.Prev = n.LastChild
+		n.LastChild = child
+	} else {
+		n.FirstChild = child
+		n.LastChild = child
+	}
+}
+
+// InsertBefore inserts 'sibling' immediately before 'n'.
+// It panics if either node is nil.
+func (n *Node) InsertBefore(sibling *Node) {
+	sibling.Unlink()
+	sibling.Prev = n.Prev
+	if sibling.Prev != nil {
+		sibling.Prev.Next = sibling
+	}
+	sibling.Next = n
+	n.Prev = sibling
+	sibling.Parent = n.Parent
+	if sibling.Prev == nil {
+		sibling.Parent.FirstChild = sibling
+	}
+}
+
+func (n *Node) isContainer() bool {
+	switch n.Type {
+	case Document:
+		fallthrough
+	case BlockQuote:
+		fallthrough
+	case List:
+		fallthrough
+	case Item:
+		fallthrough
+	case Paragraph:
+		fallthrough
+	case Heading:
+		fallthrough
+	case Emph:
+		fallthrough
+	case Strong:
+		fallthrough
+	case Del:
+		fallthrough
+	case Link:
+		fallthrough
+	case Image:
+		fallthrough
+	case Table:
+		fallthrough
+	case TableHead:
+		fallthrough
+	case TableBody:
+		fallthrough
+	case TableRow:
+		fallthrough
+	case TableCell:
+		return true
+	default:
+		return false
+	}
+}
+
+func (n *Node) canContain(t NodeType) bool {
+	if n.Type == List {
+		return t == Item
+	}
+	if n.Type == Document || n.Type == BlockQuote || n.Type == Item {
+		return t != Item
+	}
+	if n.Type == Table {
+		return t == TableHead || t == TableBody
+	}
+	if n.Type == TableHead || n.Type == TableBody {
+		return t == TableRow
+	}
+	if n.Type == TableRow {
+		return t == TableCell
+	}
+	return false
+}
+
+// WalkStatus allows NodeVisitor to have some control over the tree traversal.
+// It is returned from NodeVisitor and different values allow Node.Walk to
+// decide which node to go to next.
+type WalkStatus int
+
+const (
+	// GoToNext is the default traversal of every node.
+	GoToNext WalkStatus = iota
+	// SkipChildren tells walker to skip all children of current node.
+	SkipChildren
+	// Terminate tells walker to terminate the traversal.
+	Terminate
+)
+
+// NodeVisitor is a callback to be called when traversing the syntax tree.
+// Called twice for every node: once with entering=true when the branch is
+// first visited, then with entering=false after all the children are done.
+type NodeVisitor func(node *Node, entering bool) WalkStatus
+
+// Walk is a convenience method that instantiates a walker and starts a
+// traversal of subtree rooted at n.
+func (n *Node) Walk(visitor NodeVisitor) {
+	w := newNodeWalker(n)
+	for w.current != nil {
+		status := visitor(w.current, w.entering)
+		switch status {
+		case GoToNext:
+			w.next()
+		case SkipChildren:
+			w.entering = false
+			w.next()
+		case Terminate:
+			return
+		}
+	}
+}
+
+type nodeWalker struct {
+	current  *Node
+	root     *Node
+	entering bool
+}
+
+func newNodeWalker(root *Node) *nodeWalker {
+	return &nodeWalker{
+		current:  root,
+		root:     root,
+		entering: true,
+	}
+}
+
+func (nw *nodeWalker) next() {
+	if (!nw.current.isContainer() || !nw.entering) && nw.current == nw.root {
+		nw.current = nil
+		return
+	}
+	if nw.entering && nw.current.isContainer() {
+		if nw.current.FirstChild != nil {
+			nw.current = nw.current.FirstChild
+			nw.entering = true
+		} else {
+			nw.entering = false
+		}
+	} else if nw.current.Next == nil {
+		nw.current = nw.current.Parent
+		nw.entering = false
+	} else {
+		nw.current = nw.current.Next
+		nw.entering = true
+	}
+}
+
+func dump(ast *Node) {
+	fmt.Println(dumpString(ast))
+}
+
+func dumpR(ast *Node, depth int) string {
+	if ast == nil {
+		return ""
+	}
+	indent := bytes.Repeat([]byte("\t"), depth)
+	content := ast.Literal
+	if content == nil {
+		content = ast.content
+	}
+	result := fmt.Sprintf("%s%s(%q)\n", indent, ast.Type, content)
+	for n := ast.FirstChild; n != nil; n = n.Next {
+		result += dumpR(n, depth+1)
+	}
+	return result
+}
+
+func dumpString(ast *Node) string {
+	return dumpR(ast, 0)
+}

vendor/github.com/russross/blackfriday/v2/smartypants.go

@@ -0,0 +1,457 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+//
+// SmartyPants rendering
+//
+//
+
+package blackfriday
+
+import (
+	"bytes"
+	"io"
+)
+
+// SPRenderer is a struct containing state of a Smartypants renderer.
+type SPRenderer struct {
+	inSingleQuote bool
+	inDoubleQuote bool
+	callbacks     [256]smartCallback
+}
+
+func wordBoundary(c byte) bool {
+	return c == 0 || isspace(c) || ispunct(c)
+}
+
+func tolower(c byte) byte {
+	if c >= 'A' && c <= 'Z' {
+		return c - 'A' + 'a'
+	}
+	return c
+}
+
+func isdigit(c byte) bool {
+	return c >= '0' && c <= '9'
+}
+
+func smartQuoteHelper(out *bytes.Buffer, previousChar byte, nextChar byte, quote byte, isOpen *bool, addNBSP bool) bool {
+	// edge of the buffer is likely to be a tag that we don't get to see,
+	// so we treat it like text sometimes
+
+	// enumerate all sixteen possibilities for (previousChar, nextChar)
+	// each can be one of {0, space, punct, other}
+	switch {
+	case previousChar == 0 && nextChar == 0:
+		// context is not any help here, so toggle
+		*isOpen = !*isOpen
+	case isspace(previousChar) && nextChar == 0:
+		// [ "] might be [ "<code>foo...]
+		*isOpen = true
+	case ispunct(previousChar) && nextChar == 0:
+		// [!"] hmm... could be [Run!"] or [("<code>...]
+		*isOpen = false
+	case /* isnormal(previousChar) && */ nextChar == 0:
+		// [a"] is probably a close
+		*isOpen = false
+	case previousChar == 0 && isspace(nextChar):
+		// [" ] might be [...foo</code>" ]
+		*isOpen = false
+	case isspace(previousChar) && isspace(nextChar):
+		// [ " ] context is not any help here, so toggle
+		*isOpen = !*isOpen
+	case ispunct(previousChar) && isspace(nextChar):
+		// [!" ] is probably a close
+		*isOpen = false
+	case /* isnormal(previousChar) && */ isspace(nextChar):
+		// [a" ] this is one of the easy cases
+		*isOpen = false
+	case previousChar == 0 && ispunct(nextChar):
+		// ["!] hmm... could be ["$1.95] or [</code>"!...]
+		*isOpen = false
+	case isspace(previousChar) && ispunct(nextChar):
+		// [ "!] looks more like [ "$1.95]
+		*isOpen = true
+	case ispunct(previousChar) && ispunct(nextChar):
+		// [!"!] context is not any help here, so toggle
+		*isOpen = !*isOpen
+	case /* isnormal(previousChar) && */ ispunct(nextChar):
+		// [a"!] is probably a close
+		*isOpen = false
+	case previousChar == 0 /* && isnormal(nextChar) */ :
+		// ["a] is probably an open
+		*isOpen = true
+	case isspace(previousChar) /* && isnormal(nextChar) */ :
+		// [ "a] this is one of the easy cases
+		*isOpen = true
+	case ispunct(previousChar) /* && isnormal(nextChar) */ :
+		// [!"a] is probably an open
+		*isOpen = true
+	default:
+		// [a'b] maybe a contraction?
+		*isOpen = false
+	}
+
+	// Note that with the limited lookahead, this non-breaking
+	// space will also be appended to single double quotes.
+	if addNBSP && !*isOpen {
+		out.WriteString("&nbsp;")
+	}
+
+	out.WriteByte('&')
+	if *isOpen {
+		out.WriteByte('l')
+	} else {
+		out.WriteByte('r')
+	}
+	out.WriteByte(quote)
+	out.WriteString("quo;")
+
+	if addNBSP && *isOpen {
+		out.WriteString("&nbsp;")
+	}
+
+	return true
+}
+
+func (r *SPRenderer) smartSingleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 2 {
+		t1 := tolower(text[1])
+
+		if t1 == '\'' {
+			nextChar := byte(0)
+			if len(text) >= 3 {
+				nextChar = text[2]
+			}
+			if smartQuoteHelper(out, previousChar, nextChar, 'd', &r.inDoubleQuote, false) {
+				return 1
+			}
+		}
+
+		if (t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') && (len(text) < 3 || wordBoundary(text[2])) {
+			out.WriteString("&rsquo;")
+			return 0
+		}
+
+		if len(text) >= 3 {
+			t2 := tolower(text[2])
+
+			if ((t1 == 'r' && t2 == 'e') || (t1 == 'l' && t2 == 'l') || (t1 == 'v' && t2 == 'e')) &&
+				(len(text) < 4 || wordBoundary(text[3])) {
+				out.WriteString("&rsquo;")
+				return 0
+			}
+		}
+	}
+
+	nextChar := byte(0)
+	if len(text) > 1 {
+		nextChar = text[1]
+	}
+	if smartQuoteHelper(out, previousChar, nextChar, 's', &r.inSingleQuote, false) {
+		return 0
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartParens(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 3 {
+		t1 := tolower(text[1])
+		t2 := tolower(text[2])
+
+		if t1 == 'c' && t2 == ')' {
+			out.WriteString("&copy;")
+			return 2
+		}
+
+		if t1 == 'r' && t2 == ')' {
+			out.WriteString("&reg;")
+			return 2
+		}
+
+		if len(text) >= 4 && t1 == 't' && t2 == 'm' && text[3] == ')' {
+			out.WriteString("&trade;")
+			return 3
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartDash(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 2 {
+		if text[1] == '-' {
+			out.WriteString("&mdash;")
+			return 1
+		}
+
+		if wordBoundary(previousChar) && wordBoundary(text[1]) {
+			out.WriteString("&ndash;")
+			return 0
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartDashLatex(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 3 && text[1] == '-' && text[2] == '-' {
+		out.WriteString("&mdash;")
+		return 2
+	}
+	if len(text) >= 2 && text[1] == '-' {
+		out.WriteString("&ndash;")
+		return 1
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartAmpVariant(out *bytes.Buffer, previousChar byte, text []byte, quote byte, addNBSP bool) int {
+	if bytes.HasPrefix(text, []byte("&quot;")) {
+		nextChar := byte(0)
+		if len(text) >= 7 {
+			nextChar = text[6]
+		}
+		if smartQuoteHelper(out, previousChar, nextChar, quote, &r.inDoubleQuote, addNBSP) {
+			return 5
+		}
+	}
+
+	if bytes.HasPrefix(text, []byte("&#0;")) {
+		return 3
+	}
+
+	out.WriteByte('&')
+	return 0
+}
+
+func (r *SPRenderer) smartAmp(angledQuotes, addNBSP bool) func(*bytes.Buffer, byte, []byte) int {
+	var quote byte = 'd'
+	if angledQuotes {
+		quote = 'a'
+	}
+
+	return func(out *bytes.Buffer, previousChar byte, text []byte) int {
+		return r.smartAmpVariant(out, previousChar, text, quote, addNBSP)
+	}
+}
+
+func (r *SPRenderer) smartPeriod(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 3 && text[1] == '.' && text[2] == '.' {
+		out.WriteString("&hellip;")
+		return 2
+	}
+
+	if len(text) >= 5 && text[1] == ' ' && text[2] == '.' && text[3] == ' ' && text[4] == '.' {
+		out.WriteString("&hellip;")
+		return 4
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartBacktick(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if len(text) >= 2 && text[1] == '`' {
+		nextChar := byte(0)
+		if len(text) >= 3 {
+			nextChar = text[2]
+		}
+		if smartQuoteHelper(out, previousChar, nextChar, 'd', &r.inDoubleQuote, false) {
+			return 1
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartNumberGeneric(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 {
+		// is it of the form digits/digits(word boundary)?, i.e., \d+/\d+\b
+		// note: check for regular slash (/) or fraction slash (⁄, 0x2044, or 0xe2 81 84 in utf-8)
+		//       and avoid changing dates like 1/23/2005 into fractions.
+		numEnd := 0
+		for len(text) > numEnd && isdigit(text[numEnd]) {
+			numEnd++
+		}
+		if numEnd == 0 {
+			out.WriteByte(text[0])
+			return 0
+		}
+		denStart := numEnd + 1
+		if len(text) > numEnd+3 && text[numEnd] == 0xe2 && text[numEnd+1] == 0x81 && text[numEnd+2] == 0x84 {
+			denStart = numEnd + 3
+		} else if len(text) < numEnd+2 || text[numEnd] != '/' {
+			out.WriteByte(text[0])
+			return 0
+		}
+		denEnd := denStart
+		for len(text) > denEnd && isdigit(text[denEnd]) {
+			denEnd++
+		}
+		if denEnd == denStart {
+			out.WriteByte(text[0])
+			return 0
+		}
+		if len(text) == denEnd || wordBoundary(text[denEnd]) && text[denEnd] != '/' {
+			out.WriteString("<sup>")
+			out.Write(text[:numEnd])
+			out.WriteString("</sup>&frasl;<sub>")
+			out.Write(text[denStart:denEnd])
+			out.WriteString("</sub>")
+			return denEnd - 1
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartNumber(out *bytes.Buffer, previousChar byte, text []byte) int {
+	if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 {
+		if text[0] == '1' && text[1] == '/' && text[2] == '2' {
+			if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' {
+				out.WriteString("&frac12;")
+				return 2
+			}
+		}
+
+		if text[0] == '1' && text[1] == '/' && text[2] == '4' {
+			if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' || (len(text) >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h') {
+				out.WriteString("&frac14;")
+				return 2
+			}
+		}
+
+		if text[0] == '3' && text[1] == '/' && text[2] == '4' {
+			if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' || (len(text) >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's') {
+				out.WriteString("&frac34;")
+				return 2
+			}
+		}
+	}
+
+	out.WriteByte(text[0])
+	return 0
+}
+
+func (r *SPRenderer) smartDoubleQuoteVariant(out *bytes.Buffer, previousChar byte, text []byte, quote byte) int {
+	nextChar := byte(0)
+	if len(text) > 1 {
+		nextChar = text[1]
+	}
+	if !smartQuoteHelper(out, previousChar, nextChar, quote, &r.inDoubleQuote, false) {
+		out.WriteString("&quot;")
+	}
+
+	return 0
+}
+
+func (r *SPRenderer) smartDoubleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
+	return r.smartDoubleQuoteVariant(out, previousChar, text, 'd')
+}
+
+func (r *SPRenderer) smartAngledDoubleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
+	return r.smartDoubleQuoteVariant(out, previousChar, text, 'a')
+}
+
+func (r *SPRenderer) smartLeftAngle(out *bytes.Buffer, previousChar byte, text []byte) int {
+	i := 0
+
+	for i < len(text) && text[i] != '>' {
+		i++
+	}
+
+	out.Write(text[:i+1])
+	return i
+}
+
+type smartCallback func(out *bytes.Buffer, previousChar byte, text []byte) int
+
+// NewSmartypantsRenderer constructs a Smartypants renderer object.
+func NewSmartypantsRenderer(flags HTMLFlags) *SPRenderer {
+	var (
+		r SPRenderer
+
+		smartAmpAngled      = r.smartAmp(true, false)
+		smartAmpAngledNBSP  = r.smartAmp(true, true)
+		smartAmpRegular     = r.smartAmp(false, false)
+		smartAmpRegularNBSP = r.smartAmp(false, true)
+
+		addNBSP = flags&SmartypantsQuotesNBSP != 0
+	)
+
+	if flags&SmartypantsAngledQuotes == 0 {
+		r.callbacks['"'] = r.smartDoubleQuote
+		if !addNBSP {
+			r.callbacks['&'] = smartAmpRegular
+		} else {
+			r.callbacks['&'] = smartAmpRegularNBSP
+		}
+	} else {
+		r.callbacks['"'] = r.smartAngledDoubleQuote
+		if !addNBSP {
+			r.callbacks['&'] = smartAmpAngled
+		} else {
+			r.callbacks['&'] = smartAmpAngledNBSP
+		}
+	}
+	r.callbacks['\''] = r.smartSingleQuote
+	r.callbacks['('] = r.smartParens
+	if flags&SmartypantsDashes != 0 {
+		if flags&SmartypantsLatexDashes == 0 {
+			r.callbacks['-'] = r.smartDash
+		} else {
+			r.callbacks['-'] = r.smartDashLatex
+		}
+	}
+	r.callbacks['.'] = r.smartPeriod
+	if flags&SmartypantsFractions == 0 {
+		r.callbacks['1'] = r.smartNumber
+		r.callbacks['3'] = r.smartNumber
+	} else {
+		for ch := '1'; ch <= '9'; ch++ {
+			r.callbacks[ch] = r.smartNumberGeneric
+		}
+	}
+	r.callbacks['<'] = r.smartLeftAngle
+	r.callbacks['`'] = r.smartBacktick
+	return &r
+}
+
+// Process is the entry point of the Smartypants renderer.
+func (r *SPRenderer) Process(w io.Writer, text []byte) {
+	mark := 0
+	for i := 0; i < len(text); i++ {
+		if action := r.callbacks[text[i]]; action != nil {
+			if i > mark {
+				w.Write(text[mark:i])
+			}
+			previousChar := byte(0)
+			if i > 0 {
+				previousChar = text[i-1]
+			}
+			var tmp bytes.Buffer
+			i += action(&tmp, previousChar, text[i:])
+			w.Write(tmp.Bytes())
+			mark = i + 1
+		}
+	}
+	if mark < len(text) {
+		w.Write(text[mark:])
+	}
+}

vendor/github.com/shurcooL/sanitized_anchor_name/.travis.yml

@@ -0,0 +1,16 @@
+sudo: false
+language: go
+go:
+  - 1.x
+  - master
+matrix:
+  allow_failures:
+    - go: master
+  fast_finish: true
+install:
+  - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
+script:
+  - go get -t -v ./...
+  - diff -u <(echo -n) <(gofmt -d -s .)
+  - go tool vet .
+  - go test -v -race ./...

vendor/github.com/shurcooL/sanitized_anchor_name/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2015 Dmitri Shuralyov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/shurcooL/sanitized_anchor_name/README.md

@@ -0,0 +1,36 @@
+sanitized_anchor_name
+=====================
+
+[![Build Status](https://travis-ci.org/shurcooL/sanitized_anchor_name.svg?branch=master)](https://travis-ci.org/shurcooL/sanitized_anchor_name) [![GoDoc](https://godoc.org/github.com/shurcooL/sanitized_anchor_name?status.svg)](https://godoc.org/github.com/shurcooL/sanitized_anchor_name)
+
+Package sanitized_anchor_name provides a func to create sanitized anchor names.
+
+Its logic can be reused by multiple packages to create interoperable anchor names
+and links to those anchors.
+
+At this time, it does not try to ensure that generated anchor names
+are unique, that responsibility falls on the caller.
+
+Installation
+------------
+
+```bash
+go get -u github.com/shurcooL/sanitized_anchor_name
+```
+
+Example
+-------
+
+```Go
+anchorName := sanitized_anchor_name.Create("This is a header")
+
+fmt.Println(anchorName)
+
+// Output:
+// this-is-a-header
+```
+
+License
+-------
+
+-	[MIT License](LICENSE)

vendor/github.com/shurcooL/sanitized_anchor_name/go.mod

@@ -0,0 +1 @@
+module github.com/shurcooL/sanitized_anchor_name

vendor/github.com/shurcooL/sanitized_anchor_name/main.go

@@ -0,0 +1,29 @@
+// Package sanitized_anchor_name provides a func to create sanitized anchor names.
+//
+// Its logic can be reused by multiple packages to create interoperable anchor names
+// and links to those anchors.
+//
+// At this time, it does not try to ensure that generated anchor names
+// are unique, that responsibility falls on the caller.
+package sanitized_anchor_name // import "github.com/shurcooL/sanitized_anchor_name"
+
+import "unicode"
+
+// Create returns a sanitized anchor name for the given text.
+func Create(text string) string {
+	var anchorName []rune
+	var futureDash = false
+	for _, r := range text {
+		switch {
+		case unicode.IsLetter(r) || unicode.IsNumber(r):
+			if futureDash && len(anchorName) > 0 {
+				anchorName = append(anchorName, '-')
+			}
+			futureDash = false
+			anchorName = append(anchorName, unicode.ToLower(r))
+		default:
+			futureDash = true
+		}
+	}
+	return string(anchorName)
+}

vendor/github.com/urfave/cli/.gitignore

@@ -1,2 +1,3 @@
 *.coverprofile
 node_modules/
+vendor

vendor/github.com/urfave/cli/.travis.yml

@@ -1,27 +1,35 @@
 language: go
 sudo: false
-dist: trusty
-osx_image: xcode8.3
-go: 1.8.x
+dist: bionic
+osx_image: xcode10
+go:
+  - 1.11.x
+  - 1.12.x
+  - 1.13.x
 
 os:
-- linux
-- osx
+  - linux
+  - osx
+
+env:
+  GO111MODULE=on
+  GOPROXY=https://proxy.golang.org
 
 cache:
   directories:
-  - node_modules
+    - node_modules
 
 before_script:
-- go get github.com/urfave/gfmrun/... || true
-- go get golang.org/x/tools/cmd/goimports
-- if [ ! -f node_modules/.bin/markdown-toc ] ; then
-    npm install markdown-toc ;
-  fi
+  - go get github.com/urfave/gfmrun/cmd/gfmrun
+  - go get golang.org/x/tools/cmd/goimports
+  - npm install markdown-toc
+  - go mod tidy
 
 script:
-- ./runtests gen
-- ./runtests vet
-- ./runtests test
-- ./runtests gfmrun
-- ./runtests toc
+  - go run build.go vet
+  - go run build.go test
+  - go run build.go gfmrun
+  - go run build.go toc
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

vendor/github.com/urfave/cli/CHANGELOG.md

@@ -4,7 +4,70 @@
 
 ## [Unreleased]
 
-## 1.20.0 - 2017-08-10
+## [1.22.1] - 2019-09-11
+
+### Fixed
+
+* Hide output of hidden commands on man pages in [urfave/cli/pull/889](https://github.com/urfave/cli/pull/889) via [@crosbymichael](https://github.com/crosbymichael)
+* Don't generate fish completion for hidden commands [urfave/cli/pull/891](https://github.com/urfave/891) via [@saschagrunert](https://github.com/saschagrunert)
+* Using short flag names for required flags throws an error in [urfave/cli/pull/890](https://github.com/urfave/cli/pull/890) via [@asahasrabuddhe](https://github.com/asahasrabuddhe)
+
+### Changed
+
+* Remove flag code generation logic, legacy python test runner in [urfave/cli/pull/883](https://github.com/urfave/cli/pull/883) via [@asahasrabuddhe](https://github.com/asahasrabuddhe)
+* Enable Go Modules support, drop support for `Go 1.10` add support for `Go 1.13` in [urfave/cli/pull/885](https://github.com/urfave/cli/pull/885) via [@asahasrabuddhe](https://github.com/asahasrabuddhe)
+
+## [1.22.0] - 2019-09-07
+
+### Fixed
+
+* Fix Subcommands not falling back to `app.ExitEventHandler` in [urfave/cli/pull/856](https://github.com/urfave/cli/pull/856) via [@FaranIdo](https://github.com/FaranIdo)
+
+### Changed
+
+* Clarify that altsrc supports both TOML and JSON in [urfave/cli/pull/774](https://github.com/urfave/cli/pull/774) via [@whereswaldon](https://github.com/whereswaldon)
+* Made the exit code example more clear in [urfave/cli/pull/823](https://github.com/urfave/cli/pull/823) via [@xordspar0](https://github.com/xordspar0)
+* Removed the use of python for internal flag generation in [urfave/cli/pull/836](https://github.com/urfave/cli/pull/836) via [@asahasrabuddhe](https://github.com/asahasrabuddhe)
+* Changed the supported go versions to `1.10`, `1.11`, `1.12` in [urfave/cli/pull/843](https://github.com/urfave/cli/pull/843) via [@lafriks](https://github.com/lafriks)
+* Changed the v1 releases section in the readme in [urfave/cli/pull/862](https://github.com/urfave/cli/pull/862) via [@russoj88](https://github.com/russoj88)
+* Cleaned up go modules in [urfave/cli/pull/874](https://github.com/urfave/cli/pull/874) via [@saschagrunert](https://github.com/saschagrunert)
+
+### Added
+
+* Added `UseShortOptionHandling` for combining short flags in [urfave/cli/pull/735](https://github.com/urfave/cli/pull/735) via [@rliebz](https://github.com/rliebz)
+* Added support for flags bash completion in [urfave/cli/pull/808](https://github.com/urfave/cli/pull/808) via [@yogeshlonkar](https://github.com/yogeshlonkar)
+* Added the `TakesFile` indicator to flag in [urfave/cli/pull/851](https://github.com/urfave/cli/pull/851) via [@saschagrunert](https://github.com/saschagrunert)
+* Added fish shell completion support in [urfave/cli/pull/848](https://github.com/urfave/cli/pull/848) via [@saschagrunert](https://github.com/saschagrunert)
+
+## [1.21.0] - 2019-08-02
+
+### Fixed
+
+* Fix using "slice" flag types with `EnvVar` in [urfave/cli/pull/687](https://github.com/urfave/cli/pull/687) via [@joshuarubin](https://github.com/joshuarubin)
+* Fix regression of `SkipFlagParsing` behavior in [urfave/cli/pull/697](https://github.com/urfave/cli/pull/697) via [@jszwedko](https://github.com/jszwedko)
+* Fix handling `ShortOptions` and `SkipArgReorder` in [urfave/cli/pull/686](https://github.com/urfave/cli/pull/686) via [@baude](https://github.com/baude)
+* Fix args reordering when bool flags are present in [urfave/cli/pull/712](https://github.com/urfave/cli/pull/712) via [@windler](https://github.com/windler)
+* Fix parsing of short options in [urfave/cli/pull/758](https://github.com/urfave/cli/pull/758) via [@vrothberg](https://github.com/vrothberg)
+* Fix unaligned indents for the command help messages in [urfave/cli/pull/806](https://github.com/urfave/cli/pull/806) via [@mingrammer](https://github.com/mingrammer)
+
+### Changed
+
+* Cleaned up help output in [urfave/cli/pull/664](https://github.com/urfave/cli/pull/664) via [@maguro](https://github.com/maguro)
+* Remove redundant nil checks in [urfave/cli/pull/773](https://github.com/urfave/cli/pull/773) via [@teresy](https://github.com/teresy)
+* Case is now considered when sorting strings in [urfave/cli/pull/676](https://github.com/urfave/cli/pull/676) via [@rliebz](https://github.com/rliebz)
+
+### Added
+
+* Added _"required flags"_ support in [urfave/cli/pull/819](https://github.com/urfave/cli/pull/819) via [@lynncyrin](https://github.com/lynncyrin/)
+* Backport JSON `InputSource` to v1 in [urfave/cli/pull/598](https://github.com/urfave/cli/pull/598) via [@jszwedko](https://github.com/jszwedko)
+* Allow more customization of flag help strings in [urfave/cli/pull/661](https://github.com/urfave/cli/pull/661) via [@rliebz](https://github.com/rliebz)
+* Allow custom `ExitError` handler function in [urfave/cli/pull/628](https://github.com/urfave/cli/pull/628) via [@phinnaeus](https://github.com/phinnaeus)
+* Allow loading a variable from a file in [urfave/cli/pull/675](https://github.com/urfave/cli/pull/675) via [@jmccann](https://github.com/jmccann)
+* Allow combining short bool names in [urfave/cli/pull/684](https://github.com/urfave/cli/pull/684) via [@baude](https://github.com/baude)
+* Added test coverage to context in [urfave/cli/pull/788](https://github.com/urfave/cli/pull/788) via [@benzvan](https://github.com/benzvan)
+* Added go module support in [urfave/cli/pull/831](https://github.com/urfave/cli/pull/831) via [@saschagrunert](https://github.com/saschagrunert)
+
+## [1.20.0] - 2017-08-10
 
 ### Fixed
 
@@ -407,7 +470,13 @@ signature of `func(*cli.Context) error`, as defined by `cli.ActionFunc`.
 ### Added
 - Initial implementation.
 
-[Unreleased]: https://github.com/urfave/cli/compare/v1.18.0...HEAD
+[Unreleased]: https://github.com/urfave/cli/compare/v1.22.1...HEAD
+[1.22.1]: https://github.com/urfave/cli/compare/v1.22.0...v1.22.1
+[1.22.0]: https://github.com/urfave/cli/compare/v1.21.0...v1.22.0
+[1.21.0]: https://github.com/urfave/cli/compare/v1.20.0...v1.21.0
+[1.20.0]: https://github.com/urfave/cli/compare/v1.19.1...v1.20.0
+[1.19.1]: https://github.com/urfave/cli/compare/v1.19.0...v1.19.1
+[1.19.0]: https://github.com/urfave/cli/compare/v1.18.0...v1.19.0
 [1.18.0]: https://github.com/urfave/cli/compare/v1.17.0...v1.18.0
 [1.17.0]: https://github.com/urfave/cli/compare/v1.16.0...v1.17.0
 [1.16.0]: https://github.com/urfave/cli/compare/v1.15.0...v1.16.0

vendor/github.com/urfave/cli/CODE_OF_CONDUCT.md

@@ -0,0 +1,74 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+education, socio-economic status, nationality, personal appearance, race,
+religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting Dan Buch at dan@meatballhat.com. All complaints will be
+reviewed and investigated and will result in a response that is deemed necessary
+and appropriate to the circumstances. The project team is obligated to maintain
+confidentiality with regard to the reporter of an incident.  Further details of
+specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+[homepage]: https://www.contributor-covenant.org
+

vendor/github.com/urfave/cli/CONTRIBUTING.md

@@ -0,0 +1,18 @@
+## Contributing
+
+Use @urfave/cli to ping the maintainers.
+
+Feel free to put up a pull request to fix a bug or maybe add a feature. We will
+give it a code review and make sure that it does not break backwards
+compatibility. If collaborators agree that it is in line with
+the vision of the project, we will work with you to get the code into
+a mergeable state and merge it into the master branch.
+
+If you have contributed something significant to the project, we will most
+likely add you as a collaborator. As a collaborator you are given the ability
+to merge others pull requests. It is very important that new code does not
+break existing code, so be careful about what code you do choose to merge.
+
+If you feel like you have contributed to the project but have not yet been added
+as a collaborator, we probably forgot to add you :sweat_smile:. Please open an
+issue!

vendor/github.com/urfave/cli/README.md

@@ -3,15 +3,11 @@ cli
 
 [![Build Status](https://travis-ci.org/urfave/cli.svg?branch=master)](https://travis-ci.org/urfave/cli)
 [![Windows Build Status](https://ci.appveyor.com/api/projects/status/rtgk5xufi932pb2v?svg=true)](https://ci.appveyor.com/project/urfave/cli)
+
 [![GoDoc](https://godoc.org/github.com/urfave/cli?status.svg)](https://godoc.org/github.com/urfave/cli)
 [![codebeat](https://codebeat.co/badges/0a8f30aa-f975-404b-b878-5fab3ae1cc5f)](https://codebeat.co/projects/github-com-urfave-cli)
 [![Go Report Card](https://goreportcard.com/badge/urfave/cli)](https://goreportcard.com/report/urfave/cli)
-[![top level coverage](https://gocover.io/_badge/github.com/urfave/cli?0 "top level coverage")](http://gocover.io/github.com/urfave/cli) /
-[![altsrc coverage](https://gocover.io/_badge/github.com/urfave/cli/altsrc?0 "altsrc coverage")](http://gocover.io/github.com/urfave/cli/altsrc)
-
-**Notice:** This is the library formerly known as
-`github.com/codegangsta/cli` -- Github will automatically redirect requests
-to this repository, but we recommend updating your references for clarity.
+[![codecov](https://codecov.io/gh/urfave/cli/branch/master/graph/badge.svg)](https://codecov.io/gh/urfave/cli)
 
 cli is a simple, fast, and fun package for building command line apps in Go. The
 goal is to enable developers to write fast and distributable command line
@@ -23,7 +19,7 @@ applications in an expressive way.
 - [Installation](#installation)
   * [Supported platforms](#supported-platforms)
   * [Using the `v2` branch](#using-the-v2-branch)
-  * [Pinning to the `v1` releases](#pinning-to-the-v1-releases)
+  * [Using `v1` releases](#using-v1-releases)
 - [Getting Started](#getting-started)
 - [Examples](#examples)
   * [Arguments](#arguments)
@@ -32,10 +28,13 @@ applications in an expressive way.
     + [Alternate Names](#alternate-names)
     + [Ordering](#ordering)
     + [Values from the Environment](#values-from-the-environment)
+    + [Values from files](#values-from-files)
     + [Values from alternate input sources (YAML, TOML, and others)](#values-from-alternate-input-sources-yaml-toml-and-others)
+    + [Precedence](#precedence)
   * [Subcommands](#subcommands)
   * [Subcommands categories](#subcommands-categories)
   * [Exit code](#exit-code)
+  * [Combining short options](#combining-short-options)
   * [Bash Completion](#bash-completion)
     + [Enabling](#enabling)
     + [Distribution](#distribution)
@@ -61,7 +60,7 @@ organized, and expressive!
 
 ## Installation
 
-Make sure you have a working Go environment.  Go version 1.2+ is supported.  [See
+Make sure you have a working Go environment.  Go version 1.10+ is supported.  [See
 the install instructions for Go](http://golang.org/doc/install.html).
 
 To install cli, simply run:
@@ -105,25 +104,20 @@ import (
 ...
 ```
 
-### Pinning to the `v1` releases
-
-Similarly to the section above describing use of the `v2` branch, if one wants
-to avoid any unexpected compatibility pains once `v2` becomes `master`, then
-pinning to `v1` is an acceptable option, e.g.:
+### Using `v1` releases
 
 ```
-$ go get gopkg.in/urfave/cli.v1
+$ go get github.com/urfave/cli
 ```
 
-``` go
+```go
 ...
 import (
-  "gopkg.in/urfave/cli.v1" // imports as package "cli"
+  "github.com/urfave/cli"
 )
 ...
 ```
 
-This will pull the latest tagged `v1` release (e.g. `v1.18.1` at the time of writing).
 
 ## Getting Started
 
@@ -138,13 +132,17 @@ discovery. So a cli app can be as little as one line of code in `main()`.
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
 )
 
 func main() {
-  cli.NewApp().Run(os.Args)
+  err := cli.NewApp().Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -159,6 +157,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -173,7 +172,10 @@ func main() {
     return nil
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -197,6 +199,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -211,7 +214,10 @@ func main() {
     return nil
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -260,6 +266,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -273,7 +280,10 @@ func main() {
     return nil
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -289,6 +299,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -318,7 +329,10 @@ func main() {
     return nil
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -332,6 +346,7 @@ scanned.
 package main
 
 import (
+  "log"
   "os"
   "fmt"
 
@@ -365,7 +380,10 @@ func main() {
     return nil
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -386,6 +404,7 @@ For example this:
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -401,7 +420,10 @@ func main() {
     },
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -427,6 +449,7 @@ list for the `Name`. e.g.
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -443,7 +466,10 @@ func main() {
     },
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -467,6 +493,7 @@ For example this:
 package main
 
 import (
+  "log"
   "os"
   "sort"
 
@@ -510,7 +537,10 @@ func main() {
   sort.Sort(cli.FlagsByName(app.Flags))
   sort.Sort(cli.CommandsByName(app.Commands))
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -533,6 +563,7 @@ You can also have the default value set from the environment via `EnvVar`.  e.g.
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -550,7 +581,10 @@ func main() {
     },
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -565,6 +599,7 @@ environment variable that resolves is used as the default.
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -582,10 +617,52 @@ func main() {
     },
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
+#### Values from files
+
+You can also have the default value set from file via `FilePath`.  e.g.
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "password for the mysql database"
+} -->
+``` go
+package main
+
+import (
+  "log"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "password, p",
+      Usage: "password for the mysql database",
+      FilePath: "/etc/mysql/password",
+    },
+  }
+
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
+}
+```
+
+Note that default values set from file (e.g. `FilePath`) take precedence over
+default values set from the environment (e.g. `EnvVar`).
+
 #### Values from alternate input sources (YAML, TOML, and others)
 
 There is a separate package altsrc that adds support for getting flag values
@@ -593,6 +670,7 @@ from other file input sources.
 
 Currently supported input source formats:
 * YAML
+* JSON
 * TOML
 
 In order to get values for a flag from an alternate input source the following
@@ -615,9 +693,9 @@ the yaml input source for any flags that are defined on that command.  As a note
 the "load" flag used would also have to be defined on the command flags in order
 for this code snipped to work.
 
-Currently only the aboved specified formats are supported but developers can
-add support for other input sources by implementing the
-altsrc.InputSourceContext for their given sources.
+Currently only YAML, JSON, and TOML files are supported but developers can add support
+for other input sources by implementing the altsrc.InputSourceContext for their
+given sources.
 
 Here is a more complete sample of a command using YAML support:
 
@@ -630,6 +708,7 @@ package notmain
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -652,10 +731,22 @@ func main() {
   app.Before = altsrc.InitInputSourceWithContext(flags, altsrc.NewYamlSourceFromFlagFunc("load"))
   app.Flags = flags
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
+#### Precedence
+
+The precedence for flag value sources is as follows (highest to lowest):
+
+0. Command line flag value from user
+0. Environment variable (if specified)
+0. Configuration file (if specified)
+0. Default defined on the flag
+
 ### Subcommands
 
 Subcommands can be defined for a more git-like command line app.
@@ -669,6 +760,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -721,7 +813,10 @@ func main() {
     },
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -737,6 +832,7 @@ E.g.
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -751,15 +847,18 @@ func main() {
     },
     {
       Name:     "add",
-      Category: "template",
+      Category: "Template actions",
     },
     {
       Name:     "remove",
-      Category: "template",
+      Category: "Template actions",
     },
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -767,7 +866,7 @@ Will include:
 
 ```
 COMMANDS:
-    noop
+  noop
 
   Template actions:
     add
@@ -780,11 +879,14 @@ Calling `App.Run` will not automatically call `os.Exit`, which means that by
 default the exit code will "fall through" to being `0`.  An explicit exit code
 may be set by returning a non-nil error that fulfills `cli.ExitCoder`, *or* a
 `cli.MultiError` that includes an error that fulfills `cli.ExitCoder`, e.g.:
-
+<!-- {
+  "error": "Ginger croutons are not in the soup"
+} -->
 ``` go
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -793,22 +895,95 @@ import (
 func main() {
   app := cli.NewApp()
   app.Flags = []cli.Flag{
-    cli.BoolTFlag{
+    cli.BoolFlag{
       Name:  "ginger-crouton",
-      Usage: "is it in the soup?",
+      Usage: "Add ginger croutons to the soup",
     },
   }
   app.Action = func(ctx *cli.Context) error {
     if !ctx.Bool("ginger-crouton") {
-      return cli.NewExitError("it is not in the soup", 86)
+      return cli.NewExitError("Ginger croutons are not in the soup", 86)
     }
     return nil
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
+}
+```
+
+### Combining short options
+
+Traditional use of options using their shortnames look like this:
+
+```
+$ cmd -s -o -m "Some message"
+```
+
+Suppose you want users to be able to combine options with their shortnames. This
+can be done using the `UseShortOptionHandling` bool in your app configuration,
+or for individual commands by attaching it to the command configuration. For
+example:
+
+<!-- {
+  "args": ["short", "&#45;som", "Some message"],
+  "output": "serve: true\noption: true\nmessage: Some message\n"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "log"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+  app.UseShortOptionHandling = true
+  app.Commands = []cli.Command{
+    {
+      Name:  "short",
+      Usage: "complete a task on the list",
+      Flags: []cli.Flag{
+        cli.BoolFlag{Name: "serve, s"},
+        cli.BoolFlag{Name: "option, o"},
+        cli.StringFlag{Name: "message, m"},
+      },
+      Action: func(c *cli.Context) error {
+        fmt.Println("serve:", c.Bool("serve"))
+        fmt.Println("option:", c.Bool("option"))
+        fmt.Println("message:", c.String("message"))
+        return nil
+      },
+    },
+  }
+
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
+If your program has any number of bool flags such as `serve` and `option`, and
+optionally one non-bool flag `message`, with the short options of `-s`, `-o`,
+and `-m` respectively, setting `UseShortOptionHandling` will also support the
+following syntax:
+
+```
+$ cmd -som "Some message"
+```
+
+If you enable `UseShortOptionHandling`, then you must not use any flags that
+have a single leading `-` or this will result in failures. For example,
+`-option` can no longer be used. Flags with two leading dashes (such as
+`--options`) are still valid.
+
 ### Bash Completion
 
 You can enable completion commands by setting the `EnableBashCompletion`
@@ -825,6 +1000,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -856,7 +1032,10 @@ func main() {
     },
   }
 
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -896,6 +1075,7 @@ The default bash completion flag (`--generate-bash-completion`) is defined as
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -914,7 +1094,10 @@ func main() {
       Name: "wat",
     },
   }
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -940,6 +1123,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "io"
   "os"
 
@@ -983,7 +1167,10 @@ VERSION:
     fmt.Println("Ha HA.  I pwnd the help!!1")
   }
 
-  cli.NewApp().Run(os.Args)
+  err := cli.NewApp().Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -998,6 +1185,7 @@ setting `cli.HelpFlag`, e.g.:
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -1010,7 +1198,10 @@ func main() {
     EnvVar: "SHOW_HALP,HALPPLZ",
   }
 
-  cli.NewApp().Run(os.Args)
+  err := cli.NewApp().Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -1033,6 +1224,7 @@ setting `cli.VersionFlag`, e.g.:
 package main
 
 import (
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -1047,7 +1239,10 @@ func main() {
   app := cli.NewApp()
   app.Name = "partay"
   app.Version = "19.99.0"
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -1062,6 +1257,7 @@ package main
 
 import (
   "fmt"
+  "log"
   "os"
 
   "github.com/urfave/cli"
@@ -1079,7 +1275,10 @@ func main() {
   app := cli.NewApp()
   app.Name = "partay"
   app.Version = "19.99.0"
-  app.Run(os.Args)
+  err := app.Run(os.Args)
+  if err != nil {
+    log.Fatal(err)
+  }
 }
 ```
 
@@ -1236,6 +1435,7 @@ func main() {
     cli.Uint64Flag{Name: "bigage"},
   }
   app.EnableBashCompletion = true
+  app.UseShortOptionHandling = true
   app.HideHelp = false
   app.HideVersion = false
   app.BashComplete = func(c *cli.Context) {
@@ -1341,7 +1541,7 @@ func main() {
     ec := cli.NewExitError("ohwell", 86)
     fmt.Fprintf(c.App.Writer, "%d", ec.ExitCode())
     fmt.Printf("made it!\n")
-    return ec
+    return nil
   }
 
   if os.Getenv("HEXY") != "" {
@@ -1355,7 +1555,9 @@ func main() {
     "whatever-values": 19.99,
   }
 
-  app.Run(os.Args)
+
+  // ignore error so we don't exit non-zero and break gfmrun README example tests
+  _ = app.Run(os.Args)
 }
 
 func wopAction(c *cli.Context) error {
@@ -1366,16 +1568,4 @@ func wopAction(c *cli.Context) error {
 
 ## Contribution Guidelines
 
-Feel free to put up a pull request to fix a bug or maybe add a feature. I will
-give it a code review and make sure that it does not break backwards
-compatibility. If I or any other collaborators agree that it is in line with
-the vision of the project, we will work with you to get the code into
-a mergeable state and merge it into the master branch.
-
-If you have contributed something significant to the project, we will most
-likely add you as a collaborator. As a collaborator you are given the ability
-to merge others pull requests. It is very important that new code does not
-break existing code, so be careful about what code you do choose to merge.
-
-If you feel like you have contributed to the project but have not yet been
-added as a collaborator, we probably forgot to add you, please open an issue.
+See [./CONTRIBUTING.md](./CONTRIBUTING.md)

vendor/github.com/urfave/cli/app.go

@@ -1,9 +1,9 @@
 package cli
 
 import (
+	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -11,9 +11,10 @@ import (
 )
 
 var (
-	changeLogURL                    = "https://github.com/urfave/cli/blob/master/CHANGELOG.md"
-	appActionDeprecationURL         = fmt.Sprintf("%s#deprecated-cli-app-action-signature", changeLogURL)
-	runAndExitOnErrorDeprecationURL = fmt.Sprintf("%s#deprecated-cli-app-runandexitonerror", changeLogURL)
+	changeLogURL            = "https://github.com/urfave/cli/blob/master/CHANGELOG.md"
+	appActionDeprecationURL = fmt.Sprintf("%s#deprecated-cli-app-action-signature", changeLogURL)
+	// unused variable. commented for now. will remove in future if agreed upon by everyone
+	//runAndExitOnErrorDeprecationURL = fmt.Sprintf("%s#deprecated-cli-app-runandexitonerror", changeLogURL)
 
 	contactSysadmin = "This is an error in the application.  Please contact the distributor of this application if this is not you."
 
@@ -83,6 +84,9 @@ type App struct {
 	Writer io.Writer
 	// ErrWriter writes error output
 	ErrWriter io.Writer
+	// Execute this function to handle ExitErrors. If not provided, HandleExitCoder is provided to
+	// function as a default, so this is optional.
+	ExitErrHandler ExitErrHandlerFunc
 	// Other custom info
 	Metadata map[string]interface{}
 	// Carries a function which returns app specific info.
@@ -91,6 +95,10 @@ type App struct {
 	// cli.go uses text/template to render templates. You can
 	// render custom help text by setting this variable.
 	CustomAppHelpTemplate string
+	// Boolean to enable short-option handling so user can combine several
+	// single-character bool arguements into one
+	// i.e. foobar -o -v -> foobar -ov
+	UseShortOptionHandling bool
 
 	didSetup bool
 }
@@ -135,7 +143,7 @@ func (a *App) Setup() {
 		a.Authors = append(a.Authors, Author{Name: a.Author, Email: a.Email})
 	}
 
-	newCmds := []Command{}
+	var newCmds []Command
 	for _, c := range a.Commands {
 		if c.HelpName == "" {
 			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
@@ -170,6 +178,14 @@ func (a *App) Setup() {
 	}
 }
 
+func (a *App) newFlagSet() (*flag.FlagSet, error) {
+	return flagSet(a.Name, a.Flags)
+}
+
+func (a *App) useShortOptionHandling() bool {
+	return a.UseShortOptionHandling
+}
+
 // Run is the entry point to the cli app. Parses the arguments slice and routes
 // to the proper flag/args combination
 func (a *App) Run(arguments []string) (err error) {
@@ -183,19 +199,17 @@ func (a *App) Run(arguments []string) (err error) {
 	// always appends the completion flag at the end of the command
 	shellComplete, arguments := checkShellCompleteFlag(a, arguments)
 
-	// parse flags
-	set, err := flagSet(a.Name, a.Flags)
+	_, err = a.newFlagSet()
 	if err != nil {
 		return err
 	}
 
-	set.SetOutput(ioutil.Discard)
-	err = set.Parse(arguments[1:])
+	set, err := parseIter(a, arguments[1:])
 	nerr := normalizeFlags(a.Flags, set)
 	context := NewContext(a, set, nil)
 	if nerr != nil {
-		fmt.Fprintln(a.Writer, nerr)
-		ShowAppHelp(context)
+		_, _ = fmt.Fprintln(a.Writer, nerr)
+		_ = ShowAppHelp(context)
 		return nerr
 	}
 	context.shellComplete = shellComplete
@@ -207,16 +221,16 @@ func (a *App) Run(arguments []string) (err error) {
 	if err != nil {
 		if a.OnUsageError != nil {
 			err := a.OnUsageError(context, err, false)
-			HandleExitCoder(err)
+			a.handleExitCoder(context, err)
 			return err
 		}
-		fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
-		ShowAppHelp(context)
+		_, _ = fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
+		_ = ShowAppHelp(context)
 		return err
 	}
 
 	if !a.HideHelp && checkHelp(context) {
-		ShowAppHelp(context)
+		_ = ShowAppHelp(context)
 		return nil
 	}
 
@@ -225,6 +239,12 @@ func (a *App) Run(arguments []string) (err error) {
 		return nil
 	}
 
+	cerr := checkRequiredFlags(a.Flags, context)
+	if cerr != nil {
+		_ = ShowAppHelp(context)
+		return cerr
+	}
+
 	if a.After != nil {
 		defer func() {
 			if afterErr := a.After(context); afterErr != nil {
@@ -240,8 +260,9 @@ func (a *App) Run(arguments []string) (err error) {
 	if a.Before != nil {
 		beforeErr := a.Before(context)
 		if beforeErr != nil {
-			ShowAppHelp(context)
-			HandleExitCoder(beforeErr)
+			_, _ = fmt.Fprintf(a.Writer, "%v\n\n", beforeErr)
+			_ = ShowAppHelp(context)
+			a.handleExitCoder(context, beforeErr)
 			err = beforeErr
 			return err
 		}
@@ -263,7 +284,7 @@ func (a *App) Run(arguments []string) (err error) {
 	// Run default Action
 	err = HandleAction(a.Action, context)
 
-	HandleExitCoder(err)
+	a.handleExitCoder(context, err)
 	return err
 }
 
@@ -274,7 +295,7 @@ func (a *App) Run(arguments []string) (err error) {
 // code in the cli.ExitCoder
 func (a *App) RunAndExitOnError() {
 	if err := a.Run(os.Args); err != nil {
-		fmt.Fprintln(a.errWriter(), err)
+		_, _ = fmt.Fprintln(a.errWriter(), err)
 		OsExiter(1)
 	}
 }
@@ -301,24 +322,22 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 	}
 	a.Commands = newCmds
 
-	// parse flags
-	set, err := flagSet(a.Name, a.Flags)
+	_, err = a.newFlagSet()
 	if err != nil {
 		return err
 	}
 
-	set.SetOutput(ioutil.Discard)
-	err = set.Parse(ctx.Args().Tail())
+	set, err := parseIter(a, ctx.Args().Tail())
 	nerr := normalizeFlags(a.Flags, set)
 	context := NewContext(a, set, ctx)
 
 	if nerr != nil {
-		fmt.Fprintln(a.Writer, nerr)
-		fmt.Fprintln(a.Writer)
+		_, _ = fmt.Fprintln(a.Writer, nerr)
+		_, _ = fmt.Fprintln(a.Writer)
 		if len(a.Commands) > 0 {
-			ShowSubcommandHelp(context)
+			_ = ShowSubcommandHelp(context)
 		} else {
-			ShowCommandHelp(ctx, context.Args().First())
+			_ = ShowCommandHelp(ctx, context.Args().First())
 		}
 		return nerr
 	}
@@ -330,11 +349,11 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 	if err != nil {
 		if a.OnUsageError != nil {
 			err = a.OnUsageError(context, err, true)
-			HandleExitCoder(err)
+			a.handleExitCoder(context, err)
 			return err
 		}
-		fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
-		ShowSubcommandHelp(context)
+		_, _ = fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
+		_ = ShowSubcommandHelp(context)
 		return err
 	}
 
@@ -348,11 +367,17 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 		}
 	}
 
+	cerr := checkRequiredFlags(a.Flags, context)
+	if cerr != nil {
+		_ = ShowSubcommandHelp(context)
+		return cerr
+	}
+
 	if a.After != nil {
 		defer func() {
 			afterErr := a.After(context)
 			if afterErr != nil {
-				HandleExitCoder(err)
+				a.handleExitCoder(context, err)
 				if err != nil {
 					err = NewMultiError(err, afterErr)
 				} else {
@@ -365,7 +390,7 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 	if a.Before != nil {
 		beforeErr := a.Before(context)
 		if beforeErr != nil {
-			HandleExitCoder(beforeErr)
+			a.handleExitCoder(context, beforeErr)
 			err = beforeErr
 			return err
 		}
@@ -383,7 +408,7 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 	// Run default Action
 	err = HandleAction(a.Action, context)
 
-	HandleExitCoder(err)
+	a.handleExitCoder(context, err)
 	return err
 }
 
@@ -424,7 +449,7 @@ func (a *App) VisibleCategories() []*CommandCategory {
 
 // VisibleCommands returns a slice of the Commands with Hidden=false
 func (a *App) VisibleCommands() []Command {
-	ret := []Command{}
+	var ret []Command
 	for _, command := range a.Commands {
 		if !command.Hidden {
 			ret = append(ret, command)
@@ -449,7 +474,6 @@ func (a *App) hasFlag(flag Flag) bool {
 }
 
 func (a *App) errWriter() io.Writer {
-
 	// When the app ErrWriter is nil use the package level one.
 	if a.ErrWriter == nil {
 		return ErrWriter
@@ -464,6 +488,14 @@ func (a *App) appendFlag(flag Flag) {
 	}
 }
 
+func (a *App) handleExitCoder(context *Context, err error) {
+	if a.ExitErrHandler != nil {
+		a.ExitErrHandler(context, err)
+	} else {
+		HandleExitCoder(err)
+	}
+}
+
 // Author represents someone who has contributed to a cli project.
 type Author struct {
 	Name  string // The Authors name
@@ -484,14 +516,15 @@ func (a Author) String() string {
 // it's an ActionFunc or a func with the legacy signature for Action, the func
 // is run!
 func HandleAction(action interface{}, context *Context) (err error) {
-	if a, ok := action.(ActionFunc); ok {
+	switch a := action.(type) {
+	case ActionFunc:
 		return a(context)
-	} else if a, ok := action.(func(*Context) error); ok {
+	case func(*Context) error:
 		return a(context)
-	} else if a, ok := action.(func(*Context)); ok { // deprecated function signature
+	case func(*Context): // deprecated function signature
 		a(context)
 		return nil
-	} else {
-		return errInvalidActionType
 	}
+
+	return errInvalidActionType
 }

vendor/github.com/urfave/cli/appveyor.yml

@@ -8,19 +8,16 @@ clone_folder: c:\gopath\src\github.com\urfave\cli
 
 environment:
   GOPATH: C:\gopath
-  GOVERSION: 1.8.x
-  PYTHON: C:\Python36-x64
-  PYTHON_VERSION: 3.6.x
-  PYTHON_ARCH: 64
+  GOVERSION: 1.11.x
 
 install:
-- set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
-- go version
-- go env
-- go get github.com/urfave/gfmrun/...
-- go get -v -t ./...
+  - set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
+  - go version
+  - go env
+  - go get github.com/urfave/gfmrun/...
+  - go get -v -t ./...
 
 build_script:
-- python runtests vet
-- python runtests test
-- python runtests gfmrun
+  - go run build.go vet
+  - go run build.go test
+  - go run build.go gfmrun

vendor/github.com/urfave/cli/category.go

@@ -10,7 +10,7 @@ type CommandCategory struct {
 }
 
 func (c CommandCategories) Less(i, j int) bool {
-	return c[i].Name < c[j].Name
+	return lexicographicLess(c[i].Name, c[j].Name)
 }
 
 func (c CommandCategories) Len() int {

vendor/github.com/urfave/cli/cli.go

@@ -19,4 +19,4 @@
 //   }
 package cli
 
-//go:generate python ./generate-flag-types cli -i flag-types.json -o flag_generated.go
+//go:generate go run flag-gen/main.go flag-gen/assets_vfsdata.go

vendor/github.com/urfave/cli/command.go

@@ -1,8 +1,8 @@
 package cli
 
 import (
+	"flag"
 	"fmt"
-	"io/ioutil"
 	"sort"
 	"strings"
 )
@@ -55,6 +55,10 @@ type Command struct {
 	HideHelp bool
 	// Boolean to hide this command from help or completion
 	Hidden bool
+	// Boolean to enable short-option handling so user can combine several
+	// single-character bool arguments into one
+	// i.e. foobar -o -v -> foobar -ov
+	UseShortOptionHandling bool
 
 	// Full name of command for help, defaults to full command name, including parent commands.
 	HelpName        string
@@ -73,7 +77,7 @@ func (c CommandsByName) Len() int {
 }
 
 func (c CommandsByName) Less(i, j int) bool {
-	return c[i].Name < c[j].Name
+	return lexicographicLess(c[i].Name, c[j].Name)
 }
 
 func (c CommandsByName) Swap(i, j int) {
@@ -106,57 +110,11 @@ func (c Command) Run(ctx *Context) (err error) {
 		)
 	}
 
-	set, err := flagSet(c.Name, c.Flags)
-	if err != nil {
-		return err
-	}
-	set.SetOutput(ioutil.Discard)
-
-	if c.SkipFlagParsing {
-		err = set.Parse(append([]string{"--"}, ctx.Args().Tail()...))
-	} else if !c.SkipArgReorder {
-		firstFlagIndex := -1
-		terminatorIndex := -1
-		for index, arg := range ctx.Args() {
-			if arg == "--" {
-				terminatorIndex = index
-				break
-			} else if arg == "-" {
-				// Do nothing. A dash alone is not really a flag.
-				continue
-			} else if strings.HasPrefix(arg, "-") && firstFlagIndex == -1 {
-				firstFlagIndex = index
-			}
-		}
-
-		if firstFlagIndex > -1 {
-			args := ctx.Args()
-			regularArgs := make([]string, len(args[1:firstFlagIndex]))
-			copy(regularArgs, args[1:firstFlagIndex])
-
-			var flagArgs []string
-			if terminatorIndex > -1 {
-				flagArgs = args[firstFlagIndex:terminatorIndex]
-				regularArgs = append(regularArgs, args[terminatorIndex:]...)
-			} else {
-				flagArgs = args[firstFlagIndex:]
-			}
-
-			err = set.Parse(append(flagArgs, regularArgs...))
-		} else {
-			err = set.Parse(ctx.Args().Tail())
-		}
-	} else {
-		err = set.Parse(ctx.Args().Tail())
+	if ctx.App.UseShortOptionHandling {
+		c.UseShortOptionHandling = true
 	}
 
-	nerr := normalizeFlags(c.Flags, set)
-	if nerr != nil {
-		fmt.Fprintln(ctx.App.Writer, nerr)
-		fmt.Fprintln(ctx.App.Writer)
-		ShowCommandHelp(ctx, c.Name)
-		return nerr
-	}
+	set, err := c.parseFlags(ctx.Args().Tail())
 
 	context := NewContext(ctx.App, set, ctx)
 	context.Command = c
@@ -167,12 +125,12 @@ func (c Command) Run(ctx *Context) (err error) {
 	if err != nil {
 		if c.OnUsageError != nil {
 			err := c.OnUsageError(context, err, false)
-			HandleExitCoder(err)
+			context.App.handleExitCoder(context, err)
 			return err
 		}
-		fmt.Fprintln(context.App.Writer, "Incorrect Usage:", err.Error())
-		fmt.Fprintln(context.App.Writer)
-		ShowCommandHelp(context, c.Name)
+		_, _ = fmt.Fprintln(context.App.Writer, "Incorrect Usage:", err.Error())
+		_, _ = fmt.Fprintln(context.App.Writer)
+		_ = ShowCommandHelp(context, c.Name)
 		return err
 	}
 
@@ -180,11 +138,17 @@ func (c Command) Run(ctx *Context) (err error) {
 		return nil
 	}
 
+	cerr := checkRequiredFlags(c.Flags, context)
+	if cerr != nil {
+		_ = ShowCommandHelp(context, c.Name)
+		return cerr
+	}
+
 	if c.After != nil {
 		defer func() {
 			afterErr := c.After(context)
 			if afterErr != nil {
-				HandleExitCoder(err)
+				context.App.handleExitCoder(context, err)
 				if err != nil {
 					err = NewMultiError(err, afterErr)
 				} else {
@@ -197,8 +161,8 @@ func (c Command) Run(ctx *Context) (err error) {
 	if c.Before != nil {
 		err = c.Before(context)
 		if err != nil {
-			ShowCommandHelp(context, c.Name)
-			HandleExitCoder(err)
+			_ = ShowCommandHelp(context, c.Name)
+			context.App.handleExitCoder(context, err)
 			return err
 		}
 	}
@@ -210,11 +174,76 @@ func (c Command) Run(ctx *Context) (err error) {
 	err = HandleAction(c.Action, context)
 
 	if err != nil {
-		HandleExitCoder(err)
+		context.App.handleExitCoder(context, err)
 	}
 	return err
 }
 
+func (c *Command) parseFlags(args Args) (*flag.FlagSet, error) {
+	if c.SkipFlagParsing {
+		set, err := c.newFlagSet()
+		if err != nil {
+			return nil, err
+		}
+
+		return set, set.Parse(append([]string{"--"}, args...))
+	}
+
+	if !c.SkipArgReorder {
+		args = reorderArgs(args)
+	}
+
+	set, err := parseIter(c, args)
+	if err != nil {
+		return nil, err
+	}
+
+	err = normalizeFlags(c.Flags, set)
+	if err != nil {
+		return nil, err
+	}
+
+	return set, nil
+}
+
+func (c *Command) newFlagSet() (*flag.FlagSet, error) {
+	return flagSet(c.Name, c.Flags)
+}
+
+func (c *Command) useShortOptionHandling() bool {
+	return c.UseShortOptionHandling
+}
+
+// reorderArgs moves all flags before arguments as this is what flag expects
+func reorderArgs(args []string) []string {
+	var nonflags, flags []string
+
+	readFlagValue := false
+	for i, arg := range args {
+		if arg == "--" {
+			nonflags = append(nonflags, args[i:]...)
+			break
+		}
+
+		if readFlagValue && !strings.HasPrefix(arg, "-") && !strings.HasPrefix(arg, "--") {
+			readFlagValue = false
+			flags = append(flags, arg)
+			continue
+		}
+		readFlagValue = false
+
+		if arg != "-" && strings.HasPrefix(arg, "-") {
+			flags = append(flags, arg)
+
+			readFlagValue = !strings.Contains(arg, "=")
+		} else {
+			nonflags = append(nonflags, arg)
+		}
+	}
+
+	return append(flags, nonflags...)
+}
+
 // Names returns the names including short names and aliases.
 func (c Command) Names() []string {
 	names := []string{c.Name}
@@ -239,6 +268,7 @@ func (c Command) HasName(name string) bool {
 func (c Command) startApp(ctx *Context) error {
 	app := NewApp()
 	app.Metadata = ctx.App.Metadata
+	app.ExitErrHandler = ctx.App.ExitErrHandler
 	// set the name and usage
 	app.Name = fmt.Sprintf("%s %s", ctx.App.Name, c.Name)
 	if c.HelpName == "" {
@@ -267,6 +297,7 @@ func (c Command) startApp(ctx *Context) error {
 	app.Email = ctx.App.Email
 	app.Writer = ctx.App.Writer
 	app.ErrWriter = ctx.App.ErrWriter
+	app.UseShortOptionHandling = ctx.App.UseShortOptionHandling
 
 	app.categories = CommandCategories{}
 	for _, command := range c.Subcommands {

vendor/github.com/urfave/cli/context.go

@@ -3,6 +3,8 @@ package cli
 import (
 	"errors"
 	"flag"
+	"fmt"
+	"os"
 	"reflect"
 	"strings"
 	"syscall"
@@ -73,7 +75,7 @@ func (c *Context) IsSet(name string) bool {
 		// change in version 2 to add `IsSet` to the Flag interface to push the
 		// responsibility closer to where the information required to determine
 		// whether a flag is set by non-standard means such as environment
-		// variables is avaliable.
+		// variables is available.
 		//
 		// See https://github.com/urfave/cli/issues/294 for additional discussion
 		flags := c.Command.Flags
@@ -93,18 +95,26 @@ func (c *Context) IsSet(name string) bool {
 					val = val.Elem()
 				}
 
-				envVarValue := val.FieldByName("EnvVar")
-				if !envVarValue.IsValid() {
-					return
+				filePathValue := val.FieldByName("FilePath")
+				if filePathValue.IsValid() {
+					eachName(filePathValue.String(), func(filePath string) {
+						if _, err := os.Stat(filePath); err == nil {
+							c.setFlags[name] = true
+							return
+						}
+					})
 				}
 
-				eachName(envVarValue.String(), func(envVar string) {
-					envVar = strings.TrimSpace(envVar)
-					if _, ok := syscall.Getenv(envVar); ok {
-						c.setFlags[name] = true
-						return
-					}
-				})
+				envVarValue := val.FieldByName("EnvVar")
+				if envVarValue.IsValid() {
+					eachName(envVarValue.String(), func(envVar string) {
+						envVar = strings.TrimSpace(envVar)
+						if _, ok := syscall.Getenv(envVar); ok {
+							c.setFlags[name] = true
+							return
+						}
+					})
+				}
 			})
 		}
 	}
@@ -129,8 +139,8 @@ func (c *Context) GlobalIsSet(name string) bool {
 
 // FlagNames returns a slice of flag names used in this context.
 func (c *Context) FlagNames() (names []string) {
-	for _, flag := range c.Command.Flags {
-		name := strings.Split(flag.GetName(), ",")[0]
+	for _, f := range c.Command.Flags {
+		name := strings.Split(f.GetName(), ",")[0]
 		if name == "help" {
 			continue
 		}
@@ -141,8 +151,8 @@ func (c *Context) FlagNames() (names []string) {
 
 // GlobalFlagNames returns a slice of global flag names used by the app.
 func (c *Context) GlobalFlagNames() (names []string) {
-	for _, flag := range c.App.Flags {
-		name := strings.Split(flag.GetName(), ",")[0]
+	for _, f := range c.App.Flags {
+		name := strings.Split(f.GetName(), ",")[0]
 		if name == "help" || name == "version" {
 			continue
 		}
@@ -240,7 +250,7 @@ func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
 	switch ff.Value.(type) {
 	case *StringSlice:
 	default:
-		set.Set(name, ff.Value.String())
+		_ = set.Set(name, ff.Value.String())
 	}
 }
 
@@ -276,3 +286,54 @@ func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
 	}
 	return nil
 }
+
+type requiredFlagsErr interface {
+	error
+	getMissingFlags() []string
+}
+
+type errRequiredFlags struct {
+	missingFlags []string
+}
+
+func (e *errRequiredFlags) Error() string {
+	numberOfMissingFlags := len(e.missingFlags)
+	if numberOfMissingFlags == 1 {
+		return fmt.Sprintf("Required flag %q not set", e.missingFlags[0])
+	}
+	joinedMissingFlags := strings.Join(e.missingFlags, ", ")
+	return fmt.Sprintf("Required flags %q not set", joinedMissingFlags)
+}
+
+func (e *errRequiredFlags) getMissingFlags() []string {
+	return e.missingFlags
+}
+
+func checkRequiredFlags(flags []Flag, context *Context) requiredFlagsErr {
+	var missingFlags []string
+	for _, f := range flags {
+		if rf, ok := f.(RequiredFlag); ok && rf.IsRequired() {
+			var flagPresent bool
+			var flagName string
+			for _, key := range strings.Split(f.GetName(), ",") {
+				if len(key) > 1 {
+					flagName = key
+				}
+
+				if context.IsSet(strings.TrimSpace(key)) {
+					flagPresent = true
+				}
+			}
+
+			if !flagPresent && flagName != "" {
+				missingFlags = append(missingFlags, flagName)
+			}
+		}
+	}
+
+	if len(missingFlags) != 0 {
+		return &errRequiredFlags{missingFlags: missingFlags}
+	}
+
+	return nil
+}

vendor/github.com/urfave/cli/docs.go

@@ -0,0 +1,148 @@
+package cli
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"sort"
+	"strings"
+	"text/template"
+
+	"github.com/cpuguy83/go-md2man/v2/md2man"
+)
+
+// ToMarkdown creates a markdown string for the `*App`
+// The function errors if either parsing or writing of the string fails.
+func (a *App) ToMarkdown() (string, error) {
+	var w bytes.Buffer
+	if err := a.writeDocTemplate(&w); err != nil {
+		return "", err
+	}
+	return w.String(), nil
+}
+
+// ToMan creates a man page string for the `*App`
+// The function errors if either parsing or writing of the string fails.
+func (a *App) ToMan() (string, error) {
+	var w bytes.Buffer
+	if err := a.writeDocTemplate(&w); err != nil {
+		return "", err
+	}
+	man := md2man.Render(w.Bytes())
+	return string(man), nil
+}
+
+type cliTemplate struct {
+	App          *App
+	Commands     []string
+	GlobalArgs   []string
+	SynopsisArgs []string
+}
+
+func (a *App) writeDocTemplate(w io.Writer) error {
+	const name = "cli"
+	t, err := template.New(name).Parse(MarkdownDocTemplate)
+	if err != nil {
+		return err
+	}
+	return t.ExecuteTemplate(w, name, &cliTemplate{
+		App:          a,
+		Commands:     prepareCommands(a.Commands, 0),
+		GlobalArgs:   prepareArgsWithValues(a.Flags),
+		SynopsisArgs: prepareArgsSynopsis(a.Flags),
+	})
+}
+
+func prepareCommands(commands []Command, level int) []string {
+	coms := []string{}
+	for i := range commands {
+		command := &commands[i]
+		if command.Hidden {
+			continue
+		}
+		usage := ""
+		if command.Usage != "" {
+			usage = command.Usage
+		}
+
+		prepared := fmt.Sprintf("%s %s\n\n%s\n",
+			strings.Repeat("#", level+2),
+			strings.Join(command.Names(), ", "),
+			usage,
+		)
+
+		flags := prepareArgsWithValues(command.Flags)
+		if len(flags) > 0 {
+			prepared += fmt.Sprintf("\n%s", strings.Join(flags, "\n"))
+		}
+
+		coms = append(coms, prepared)
+
+		// recursevly iterate subcommands
+		if len(command.Subcommands) > 0 {
+			coms = append(
+				coms,
+				prepareCommands(command.Subcommands, level+1)...,
+			)
+		}
+	}
+
+	return coms
+}
+
+func prepareArgsWithValues(flags []Flag) []string {
+	return prepareFlags(flags, ", ", "**", "**", `""`, true)
+}
+
+func prepareArgsSynopsis(flags []Flag) []string {
+	return prepareFlags(flags, "|", "[", "]", "[value]", false)
+}
+
+func prepareFlags(
+	flags []Flag,
+	sep, opener, closer, value string,
+	addDetails bool,
+) []string {
+	args := []string{}
+	for _, f := range flags {
+		flag, ok := f.(DocGenerationFlag)
+		if !ok {
+			continue
+		}
+		modifiedArg := opener
+		for _, s := range strings.Split(flag.GetName(), ",") {
+			trimmed := strings.TrimSpace(s)
+			if len(modifiedArg) > len(opener) {
+				modifiedArg += sep
+			}
+			if len(trimmed) > 1 {
+				modifiedArg += fmt.Sprintf("--%s", trimmed)
+			} else {
+				modifiedArg += fmt.Sprintf("-%s", trimmed)
+			}
+		}
+		modifiedArg += closer
+		if flag.TakesValue() {
+			modifiedArg += fmt.Sprintf("=%s", value)
+		}
+
+		if addDetails {
+			modifiedArg += flagDetails(flag)
+		}
+
+		args = append(args, modifiedArg+"\n")
+
+	}
+	sort.Strings(args)
+	return args
+}
+
+// flagDetails returns a string containing the flags metadata
+func flagDetails(flag DocGenerationFlag) string {
+	description := flag.GetUsage()
+	value := flag.GetValue()
+	if value != "" {
+		description += " (default: " + value + ")"
+	}
+	return ": " + description
+}

vendor/github.com/urfave/cli/fish.go

@@ -0,0 +1,194 @@
+package cli
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+	"text/template"
+)
+
+// ToFishCompletion creates a fish completion string for the `*App`
+// The function errors if either parsing or writing of the string fails.
+func (a *App) ToFishCompletion() (string, error) {
+	var w bytes.Buffer
+	if err := a.writeFishCompletionTemplate(&w); err != nil {
+		return "", err
+	}
+	return w.String(), nil
+}
+
+type fishCompletionTemplate struct {
+	App         *App
+	Completions []string
+	AllCommands []string
+}
+
+func (a *App) writeFishCompletionTemplate(w io.Writer) error {
+	const name = "cli"
+	t, err := template.New(name).Parse(FishCompletionTemplate)
+	if err != nil {
+		return err
+	}
+	allCommands := []string{}
+
+	// Add global flags
+	completions := a.prepareFishFlags(a.VisibleFlags(), allCommands)
+
+	// Add help flag
+	if !a.HideHelp {
+		completions = append(
+			completions,
+			a.prepareFishFlags([]Flag{HelpFlag}, allCommands)...,
+		)
+	}
+
+	// Add version flag
+	if !a.HideVersion {
+		completions = append(
+			completions,
+			a.prepareFishFlags([]Flag{VersionFlag}, allCommands)...,
+		)
+	}
+
+	// Add commands and their flags
+	completions = append(
+		completions,
+		a.prepareFishCommands(a.VisibleCommands(), &allCommands, []string{})...,
+	)
+
+	return t.ExecuteTemplate(w, name, &fishCompletionTemplate{
+		App:         a,
+		Completions: completions,
+		AllCommands: allCommands,
+	})
+}
+
+func (a *App) prepareFishCommands(commands []Command, allCommands *[]string, previousCommands []string) []string {
+	completions := []string{}
+	for i := range commands {
+		command := &commands[i]
+
+		if command.Hidden {
+			continue
+		}
+
+		var completion strings.Builder
+		completion.WriteString(fmt.Sprintf(
+			"complete -r -c %s -n '%s' -a '%s'",
+			a.Name,
+			a.fishSubcommandHelper(previousCommands),
+			strings.Join(command.Names(), " "),
+		))
+
+		if command.Usage != "" {
+			completion.WriteString(fmt.Sprintf(" -d '%s'",
+				escapeSingleQuotes(command.Usage)))
+		}
+
+		if !command.HideHelp {
+			completions = append(
+				completions,
+				a.prepareFishFlags([]Flag{HelpFlag}, command.Names())...,
+			)
+		}
+
+		*allCommands = append(*allCommands, command.Names()...)
+		completions = append(completions, completion.String())
+		completions = append(
+			completions,
+			a.prepareFishFlags(command.Flags, command.Names())...,
+		)
+
+		// recursevly iterate subcommands
+		if len(command.Subcommands) > 0 {
+			completions = append(
+				completions,
+				a.prepareFishCommands(
+					command.Subcommands, allCommands, command.Names(),
+				)...,
+			)
+		}
+	}
+
+	return completions
+}
+
+func (a *App) prepareFishFlags(flags []Flag, previousCommands []string) []string {
+	completions := []string{}
+	for _, f := range flags {
+		flag, ok := f.(DocGenerationFlag)
+		if !ok {
+			continue
+		}
+
+		completion := &strings.Builder{}
+		completion.WriteString(fmt.Sprintf(
+			"complete -c %s -n '%s'",
+			a.Name,
+			a.fishSubcommandHelper(previousCommands),
+		))
+
+		fishAddFileFlag(f, completion)
+
+		for idx, opt := range strings.Split(flag.GetName(), ",") {
+			if idx == 0 {
+				completion.WriteString(fmt.Sprintf(
+					" -l %s", strings.TrimSpace(opt),
+				))
+			} else {
+				completion.WriteString(fmt.Sprintf(
+					" -s %s", strings.TrimSpace(opt),
+				))
+
+			}
+		}
+
+		if flag.TakesValue() {
+			completion.WriteString(" -r")
+		}
+
+		if flag.GetUsage() != "" {
+			completion.WriteString(fmt.Sprintf(" -d '%s'",
+				escapeSingleQuotes(flag.GetUsage())))
+		}
+
+		completions = append(completions, completion.String())
+	}
+
+	return completions
+}
+
+func fishAddFileFlag(flag Flag, completion *strings.Builder) {
+	switch f := flag.(type) {
+	case GenericFlag:
+		if f.TakesFile {
+			return
+		}
+	case StringFlag:
+		if f.TakesFile {
+			return
+		}
+	case StringSliceFlag:
+		if f.TakesFile {
+			return
+		}
+	}
+	completion.WriteString(" -f")
+}
+
+func (a *App) fishSubcommandHelper(allCommands []string) string {
+	fishHelper := fmt.Sprintf("__fish_%s_no_subcommand", a.Name)
+	if len(allCommands) > 0 {
+		fishHelper = fmt.Sprintf(
+			"__fish_seen_subcommand_from %s",
+			strings.Join(allCommands, " "),
+		)
+	}
+	return fishHelper
+
+}
+
+func escapeSingleQuotes(input string) string {
+	return strings.Replace(input, `'`, `\'`, -1)
+}

vendor/github.com/urfave/cli/flag-types.json

@@ -1,93 +0,0 @@
-[
-  {
-    "name": "Bool",
-    "type": "bool",
-    "value": false,
-    "context_default": "false",
-    "parser": "strconv.ParseBool(f.Value.String())"
-  },
-  {
-    "name": "BoolT",
-    "type": "bool",
-    "value": false,
-    "doctail": " that is true by default",
-    "context_default": "false",
-    "parser": "strconv.ParseBool(f.Value.String())"
-  },
-  {
-    "name": "Duration",
-    "type": "time.Duration",
-    "doctail": " (see https://golang.org/pkg/time/#ParseDuration)",
-    "context_default": "0",
-    "parser": "time.ParseDuration(f.Value.String())"
-  },
-  {
-    "name": "Float64",
-    "type": "float64",
-    "context_default": "0",
-    "parser": "strconv.ParseFloat(f.Value.String(), 64)"
-  },
-  {
-    "name": "Generic",
-    "type": "Generic",
-    "dest": false,
-    "context_default": "nil",
-    "context_type": "interface{}"
-  },
-  {
-    "name": "Int64",
-    "type": "int64",
-    "context_default": "0",
-    "parser": "strconv.ParseInt(f.Value.String(), 0, 64)"
-  },
-  {
-    "name": "Int",
-    "type": "int",
-    "context_default": "0",
-    "parser": "strconv.ParseInt(f.Value.String(), 0, 64)",
-    "parser_cast": "int(parsed)"
-  },
-  {
-    "name": "IntSlice",
-    "type": "*IntSlice",
-    "dest": false,
-    "context_default": "nil",
-    "context_type": "[]int",
-    "parser": "(f.Value.(*IntSlice)).Value(), error(nil)"
-  },
-  {
-    "name": "Int64Slice",
-    "type": "*Int64Slice",
-    "dest": false,
-    "context_default": "nil",
-    "context_type": "[]int64",
-    "parser": "(f.Value.(*Int64Slice)).Value(), error(nil)"
-  },
-  {
-    "name": "String",
-    "type": "string",
-    "context_default": "\"\"",
-    "parser": "f.Value.String(), error(nil)"
-  },
-  {
-    "name": "StringSlice",
-    "type": "*StringSlice",
-    "dest": false,
-    "context_default": "nil",
-    "context_type": "[]string",
-    "parser": "(f.Value.(*StringSlice)).Value(), error(nil)"
-  },
-  {
-    "name": "Uint64",
-    "type": "uint64",
-    "context_default": "0",
-    "parser": "strconv.ParseUint(f.Value.String(), 0, 64)"
-  },
-  {
-    "name": "Uint",
-    "type": "uint",
-    "context_default": "0",
-    "parser": "strconv.ParseUint(f.Value.String(), 0, 64)",
-    "parser_cast": "uint(parsed)"
-  }
-]

vendor/github.com/urfave/cli/flag.go

@@ -3,12 +3,12 @@ package cli
 import (
 	"flag"
 	"fmt"
+	"io/ioutil"
 	"reflect"
 	"runtime"
 	"strconv"
 	"strings"
 	"syscall"
-	"time"
 )
 
 const defaultPlaceholder = "value"
@@ -37,6 +37,18 @@ var HelpFlag Flag = BoolFlag{
 // to display a flag.
 var FlagStringer FlagStringFunc = stringifyFlag
 
+// FlagNamePrefixer converts a full flag name and its placeholder into the help
+// message flag prefix. This is used by the default FlagStringer.
+var FlagNamePrefixer FlagNamePrefixFunc = prefixedNames
+
+// FlagEnvHinter annotates flag help message with the environment variable
+// details. This is used by the default FlagStringer.
+var FlagEnvHinter FlagEnvHintFunc = withEnvHint
+
+// FlagFileHinter annotates flag help message with the environment variable
+// details. This is used by the default FlagStringer.
+var FlagFileHinter FlagFileHintFunc = withFileHint
+
 // FlagsByName is a slice of Flag.
 type FlagsByName []Flag
 
@@ -45,7 +57,7 @@ func (f FlagsByName) Len() int {
 }
 
 func (f FlagsByName) Less(i, j int) bool {
-	return f[i].GetName() < f[j].GetName()
+	return lexicographicLess(f[i].GetName(), f[j].GetName())
 }
 
 func (f FlagsByName) Swap(i, j int) {
@@ -62,6 +74,29 @@ type Flag interface {
 	GetName() string
 }
 
+// RequiredFlag is an interface that allows us to mark flags as required
+// it allows flags required flags to be backwards compatible with the Flag interface
+type RequiredFlag interface {
+	Flag
+
+	IsRequired() bool
+}
+
+// DocGenerationFlag is an interface that allows documentation generation for the flag
+type DocGenerationFlag interface {
+	Flag
+
+	// TakesValue returns true of the flag takes a value, otherwise false
+	TakesValue() bool
+
+	// GetUsage returns the usage string for the flag
+	GetUsage() string
+
+	// GetValue returns the flags value as string representation and an empty
+	// string if the flag takes no value at all.
+	GetValue() string
+}
+
 // errorableFlag is an interface that allows us to return errors during apply
 // it allows flags defined in this library to return errors in a fashion backwards compatible
 // TODO remove in v2 and modify the existing Flag interface to return errors
@@ -84,6 +119,7 @@ func flagSet(name string, flags []Flag) (*flag.FlagSet, error) {
 			f.Apply(set)
 		}
 	}
+	set.SetOutput(ioutil.Discard)
 	return set, nil
 }
 
@@ -95,544 +131,12 @@ func eachName(longName string, fn func(string)) {
 	}
 }
 
-// Generic is a generic parseable type identified by a specific flag
-type Generic interface {
-	Set(value string) error
-	String() string
-}
-
-// Apply takes the flagset and calls Set on the generic flag with the value
-// provided by the user for parsing by the flag
-// Ignores parsing errors
-func (f GenericFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError takes the flagset and calls Set on the generic flag with the value
-// provided by the user for parsing by the flag
-func (f GenericFlag) ApplyWithError(set *flag.FlagSet) error {
-	val := f.Value
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				if err := val.Set(envVal); err != nil {
-					return fmt.Errorf("could not parse %s as value for flag %s: %s", envVal, f.Name, err)
-				}
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		set.Var(f.Value, name, f.Usage)
-	})
-
-	return nil
-}
-
-// StringSlice is an opaque type for []string to satisfy flag.Value and flag.Getter
-type StringSlice []string
-
-// Set appends the string value to the list of values
-func (f *StringSlice) Set(value string) error {
-	*f = append(*f, value)
-	return nil
-}
-
-// String returns a readable representation of this value (for usage defaults)
-func (f *StringSlice) String() string {
-	return fmt.Sprintf("%s", *f)
-}
-
-// Value returns the slice of strings set by this flag
-func (f *StringSlice) Value() []string {
-	return *f
-}
-
-// Get returns the slice of strings set by this flag
-func (f *StringSlice) Get() interface{} {
-	return *f
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f StringSliceFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f StringSliceFlag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				newVal := &StringSlice{}
-				for _, s := range strings.Split(envVal, ",") {
-					s = strings.TrimSpace(s)
-					if err := newVal.Set(s); err != nil {
-						return fmt.Errorf("could not parse %s as string value for flag %s: %s", envVal, f.Name, err)
-					}
-				}
-				f.Value = newVal
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Value == nil {
-			f.Value = &StringSlice{}
-		}
-		set.Var(f.Value, name, f.Usage)
-	})
-
-	return nil
-}
-
-// IntSlice is an opaque type for []int to satisfy flag.Value and flag.Getter
-type IntSlice []int
-
-// Set parses the value into an integer and appends it to the list of values
-func (f *IntSlice) Set(value string) error {
-	tmp, err := strconv.Atoi(value)
-	if err != nil {
-		return err
-	}
-	*f = append(*f, tmp)
-	return nil
-}
-
-// String returns a readable representation of this value (for usage defaults)
-func (f *IntSlice) String() string {
-	return fmt.Sprintf("%#v", *f)
-}
-
-// Value returns the slice of ints set by this flag
-func (f *IntSlice) Value() []int {
-	return *f
-}
-
-// Get returns the slice of ints set by this flag
-func (f *IntSlice) Get() interface{} {
-	return *f
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f IntSliceFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f IntSliceFlag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				newVal := &IntSlice{}
-				for _, s := range strings.Split(envVal, ",") {
-					s = strings.TrimSpace(s)
-					if err := newVal.Set(s); err != nil {
-						return fmt.Errorf("could not parse %s as int slice value for flag %s: %s", envVal, f.Name, err)
-					}
-				}
-				f.Value = newVal
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Value == nil {
-			f.Value = &IntSlice{}
-		}
-		set.Var(f.Value, name, f.Usage)
-	})
-
-	return nil
-}
-
-// Int64Slice is an opaque type for []int to satisfy flag.Value and flag.Getter
-type Int64Slice []int64
-
-// Set parses the value into an integer and appends it to the list of values
-func (f *Int64Slice) Set(value string) error {
-	tmp, err := strconv.ParseInt(value, 10, 64)
-	if err != nil {
-		return err
-	}
-	*f = append(*f, tmp)
-	return nil
-}
-
-// String returns a readable representation of this value (for usage defaults)
-func (f *Int64Slice) String() string {
-	return fmt.Sprintf("%#v", *f)
-}
-
-// Value returns the slice of ints set by this flag
-func (f *Int64Slice) Value() []int64 {
-	return *f
-}
-
-// Get returns the slice of ints set by this flag
-func (f *Int64Slice) Get() interface{} {
-	return *f
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f Int64SliceFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f Int64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				newVal := &Int64Slice{}
-				for _, s := range strings.Split(envVal, ",") {
-					s = strings.TrimSpace(s)
-					if err := newVal.Set(s); err != nil {
-						return fmt.Errorf("could not parse %s as int64 slice value for flag %s: %s", envVal, f.Name, err)
-					}
-				}
-				f.Value = newVal
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Value == nil {
-			f.Value = &Int64Slice{}
-		}
-		set.Var(f.Value, name, f.Usage)
-	})
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f BoolFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f BoolFlag) ApplyWithError(set *flag.FlagSet) error {
-	val := false
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				if envVal == "" {
-					val = false
-					break
-				}
-
-				envValBool, err := strconv.ParseBool(envVal)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
-				}
-
-				val = envValBool
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.BoolVar(f.Destination, name, val, f.Usage)
-			return
-		}
-		set.Bool(name, val, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f BoolTFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f BoolTFlag) ApplyWithError(set *flag.FlagSet) error {
-	val := true
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				if envVal == "" {
-					val = false
-					break
-				}
-
-				envValBool, err := strconv.ParseBool(envVal)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
-				}
-
-				val = envValBool
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.BoolVar(f.Destination, name, val, f.Usage)
-			return
-		}
-		set.Bool(name, val, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f StringFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f StringFlag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				f.Value = envVal
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.StringVar(f.Destination, name, f.Value, f.Usage)
-			return
-		}
-		set.String(name, f.Value, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f IntFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f IntFlag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				envValInt, err := strconv.ParseInt(envVal, 0, 64)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
-				}
-				f.Value = int(envValInt)
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.IntVar(f.Destination, name, f.Value, f.Usage)
-			return
-		}
-		set.Int(name, f.Value, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f Int64Flag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f Int64Flag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				envValInt, err := strconv.ParseInt(envVal, 0, 64)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
-				}
-
-				f.Value = envValInt
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.Int64Var(f.Destination, name, f.Value, f.Usage)
-			return
-		}
-		set.Int64(name, f.Value, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f UintFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f UintFlag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				envValInt, err := strconv.ParseUint(envVal, 0, 64)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as uint value for flag %s: %s", envVal, f.Name, err)
-				}
-
-				f.Value = uint(envValInt)
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.UintVar(f.Destination, name, f.Value, f.Usage)
-			return
-		}
-		set.Uint(name, f.Value, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f Uint64Flag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				envValInt, err := strconv.ParseUint(envVal, 0, 64)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as uint64 value for flag %s: %s", envVal, f.Name, err)
-				}
-
-				f.Value = uint64(envValInt)
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.Uint64Var(f.Destination, name, f.Value, f.Usage)
-			return
-		}
-		set.Uint64(name, f.Value, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f DurationFlag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f DurationFlag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				envValDuration, err := time.ParseDuration(envVal)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as duration for flag %s: %s", envVal, f.Name, err)
-				}
-
-				f.Value = envValDuration
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.DurationVar(f.Destination, name, f.Value, f.Usage)
-			return
-		}
-		set.Duration(name, f.Value, f.Usage)
-	})
-
-	return nil
-}
-
-// Apply populates the flag given the flag set and environment
-// Ignores errors
-func (f Float64Flag) Apply(set *flag.FlagSet) {
-	f.ApplyWithError(set)
-}
-
-// ApplyWithError populates the flag given the flag set and environment
-func (f Float64Flag) ApplyWithError(set *flag.FlagSet) error {
-	if f.EnvVar != "" {
-		for _, envVar := range strings.Split(f.EnvVar, ",") {
-			envVar = strings.TrimSpace(envVar)
-			if envVal, ok := syscall.Getenv(envVar); ok {
-				envValFloat, err := strconv.ParseFloat(envVal, 10)
-				if err != nil {
-					return fmt.Errorf("could not parse %s as float64 value for flag %s: %s", envVal, f.Name, err)
-				}
-
-				f.Value = float64(envValFloat)
-				break
-			}
-		}
-	}
-
-	eachName(f.Name, func(name string) {
-		if f.Destination != nil {
-			set.Float64Var(f.Destination, name, f.Value, f.Usage)
-			return
-		}
-		set.Float64(name, f.Value, f.Usage)
-	})
-
-	return nil
-}
-
 func visibleFlags(fl []Flag) []Flag {
-	visible := []Flag{}
-	for _, flag := range fl {
-		field := flagValue(flag).FieldByName("Hidden")
+	var visible []Flag
+	for _, f := range fl {
+		field := flagValue(f).FieldByName("Hidden")
 		if !field.IsValid() || !field.Bool() {
-			visible = append(visible, flag)
+			visible = append(visible, f)
 		}
 	}
 	return visible
@@ -692,11 +196,19 @@ func withEnvHint(envVar, str string) string {
 			suffix = "%"
 			sep = "%, %"
 		}
-		envText = fmt.Sprintf(" [%s%s%s]", prefix, strings.Join(strings.Split(envVar, ","), sep), suffix)
+		envText = " [" + prefix + strings.Join(strings.Split(envVar, ","), sep) + suffix + "]"
 	}
 	return str + envText
 }
 
+func withFileHint(filePath, str string) string {
+	fileText := ""
+	if filePath != "" {
+		fileText = fmt.Sprintf(" [%s]", filePath)
+	}
+	return str + fileText
+}
+
 func flagValue(f Flag) reflect.Value {
 	fv := reflect.ValueOf(f)
 	for fv.Kind() == reflect.Ptr {
@@ -710,14 +222,29 @@ func stringifyFlag(f Flag) string {
 
 	switch f.(type) {
 	case IntSliceFlag:
-		return withEnvHint(fv.FieldByName("EnvVar").String(),
-			stringifyIntSliceFlag(f.(IntSliceFlag)))
+		return FlagFileHinter(
+			fv.FieldByName("FilePath").String(),
+			FlagEnvHinter(
+				fv.FieldByName("EnvVar").String(),
+				stringifyIntSliceFlag(f.(IntSliceFlag)),
+			),
+		)
 	case Int64SliceFlag:
-		return withEnvHint(fv.FieldByName("EnvVar").String(),
-			stringifyInt64SliceFlag(f.(Int64SliceFlag)))
+		return FlagFileHinter(
+			fv.FieldByName("FilePath").String(),
+			FlagEnvHinter(
+				fv.FieldByName("EnvVar").String(),
+				stringifyInt64SliceFlag(f.(Int64SliceFlag)),
+			),
+		)
 	case StringSliceFlag:
-		return withEnvHint(fv.FieldByName("EnvVar").String(),
-			stringifyStringSliceFlag(f.(StringSliceFlag)))
+		return FlagFileHinter(
+			fv.FieldByName("FilePath").String(),
+			FlagEnvHinter(
+				fv.FieldByName("EnvVar").String(),
+				stringifyStringSliceFlag(f.(StringSliceFlag)),
+			),
+		)
 	}
 
 	placeholder, usage := unquoteUsage(fv.FieldByName("Usage").String())
@@ -742,17 +269,22 @@ func stringifyFlag(f Flag) string {
 		placeholder = defaultPlaceholder
 	}
 
-	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultValueString))
+	usageWithDefault := strings.TrimSpace(usage + defaultValueString)
 
-	return withEnvHint(fv.FieldByName("EnvVar").String(),
-		fmt.Sprintf("%s\t%s", prefixedNames(fv.FieldByName("Name").String(), placeholder), usageWithDefault))
+	return FlagFileHinter(
+		fv.FieldByName("FilePath").String(),
+		FlagEnvHinter(
+			fv.FieldByName("EnvVar").String(),
+			FlagNamePrefixer(fv.FieldByName("Name").String(), placeholder)+"\t"+usageWithDefault,
+		),
+	)
 }
 
 func stringifyIntSliceFlag(f IntSliceFlag) string {
-	defaultVals := []string{}
+	var defaultVals []string
 	if f.Value != nil && len(f.Value.Value()) > 0 {
 		for _, i := range f.Value.Value() {
-			defaultVals = append(defaultVals, fmt.Sprintf("%d", i))
+			defaultVals = append(defaultVals, strconv.Itoa(i))
 		}
 	}
 
@@ -760,10 +292,10 @@ func stringifyIntSliceFlag(f IntSliceFlag) string {
 }
 
 func stringifyInt64SliceFlag(f Int64SliceFlag) string {
-	defaultVals := []string{}
+	var defaultVals []string
 	if f.Value != nil && len(f.Value.Value()) > 0 {
 		for _, i := range f.Value.Value() {
-			defaultVals = append(defaultVals, fmt.Sprintf("%d", i))
+			defaultVals = append(defaultVals, strconv.FormatInt(i, 10))
 		}
 	}
 
@@ -771,11 +303,11 @@ func stringifyInt64SliceFlag(f Int64SliceFlag) string {
 }
 
 func stringifyStringSliceFlag(f StringSliceFlag) string {
-	defaultVals := []string{}
+	var defaultVals []string
 	if f.Value != nil && len(f.Value.Value()) > 0 {
 		for _, s := range f.Value.Value() {
 			if len(s) > 0 {
-				defaultVals = append(defaultVals, fmt.Sprintf("%q", s))
+				defaultVals = append(defaultVals, strconv.Quote(s))
 			}
 		}
 	}
@@ -794,6 +326,21 @@ func stringifySliceFlag(usage, name string, defaultVals []string) string {
 		defaultVal = fmt.Sprintf(" (default: %s)", strings.Join(defaultVals, ", "))
 	}
 
-	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultVal))
-	return fmt.Sprintf("%s\t%s", prefixedNames(name, placeholder), usageWithDefault)
+	usageWithDefault := strings.TrimSpace(usage + defaultVal)
+	return FlagNamePrefixer(name, placeholder) + "\t" + usageWithDefault
+}
+
+func flagFromFileEnv(filePath, envName string) (val string, ok bool) {
+	for _, envVar := range strings.Split(envName, ",") {
+		envVar = strings.TrimSpace(envVar)
+		if envVal, ok := syscall.Getenv(envVar); ok {
+			return envVal, true
+		}
+	}
+	for _, fileVar := range strings.Split(filePath, ",") {
+		if data, err := ioutil.ReadFile(fileVar); err == nil {
+			return string(data), true
+		}
+	}
+	return "", false
 }

vendor/github.com/urfave/cli/flag_bool.go

@@ -0,0 +1,109 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// BoolFlag is a flag with type bool
+type BoolFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Destination *bool
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f BoolFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f BoolFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f BoolFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f BoolFlag) TakesValue() bool {
+	return false
+}
+
+// GetUsage returns the usage string for the flag
+func (f BoolFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f BoolFlag) GetValue() string {
+	return ""
+}
+
+// Bool looks up the value of a local BoolFlag, returns
+// false if not found
+func (c *Context) Bool(name string) bool {
+	return lookupBool(name, c.flagSet)
+}
+
+// GlobalBool looks up the value of a global BoolFlag, returns
+// false if not found
+func (c *Context) GlobalBool(name string) bool {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupBool(name, fs)
+	}
+	return false
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f BoolFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f BoolFlag) ApplyWithError(set *flag.FlagSet) error {
+	val := false
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		if envVal == "" {
+			val = false
+		} else {
+			envValBool, err := strconv.ParseBool(envVal)
+			if err != nil {
+				return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
+			}
+			val = envValBool
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.BoolVar(f.Destination, name, val, f.Usage)
+			return
+		}
+		set.Bool(name, val, f.Usage)
+	})
+
+	return nil
+}
+
+func lookupBool(name string, set *flag.FlagSet) bool {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseBool(f.Value.String())
+		if err != nil {
+			return false
+		}
+		return parsed
+	}
+	return false
+}

vendor/github.com/urfave/cli/flag_bool_t.go

@@ -0,0 +1,110 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// BoolTFlag is a flag with type bool that is true by default
+type BoolTFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Destination *bool
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f BoolTFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f BoolTFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f BoolTFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f BoolTFlag) TakesValue() bool {
+	return false
+}
+
+// GetUsage returns the usage string for the flag
+func (f BoolTFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f BoolTFlag) GetValue() string {
+	return ""
+}
+
+// BoolT looks up the value of a local BoolTFlag, returns
+// false if not found
+func (c *Context) BoolT(name string) bool {
+	return lookupBoolT(name, c.flagSet)
+}
+
+// GlobalBoolT looks up the value of a global BoolTFlag, returns
+// false if not found
+func (c *Context) GlobalBoolT(name string) bool {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupBoolT(name, fs)
+	}
+	return false
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f BoolTFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f BoolTFlag) ApplyWithError(set *flag.FlagSet) error {
+	val := true
+
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		if envVal == "" {
+			val = false
+		} else {
+			envValBool, err := strconv.ParseBool(envVal)
+			if err != nil {
+				return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
+			}
+			val = envValBool
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.BoolVar(f.Destination, name, val, f.Usage)
+			return
+		}
+		set.Bool(name, val, f.Usage)
+	})
+
+	return nil
+}
+
+func lookupBoolT(name string, set *flag.FlagSet) bool {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseBool(f.Value.String())
+		if err != nil {
+			return false
+		}
+		return parsed
+	}
+	return false
+}

vendor/github.com/urfave/cli/flag_duration.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"time"
+)
+
+// DurationFlag is a flag with type time.Duration (see https://golang.org/pkg/time/#ParseDuration)
+type DurationFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       time.Duration
+	Destination *time.Duration
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f DurationFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f DurationFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f DurationFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f DurationFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f DurationFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f DurationFlag) GetValue() string {
+	return f.Value.String()
+}
+
+// Duration looks up the value of a local DurationFlag, returns
+// 0 if not found
+func (c *Context) Duration(name string) time.Duration {
+	return lookupDuration(name, c.flagSet)
+}
+
+// GlobalDuration looks up the value of a global DurationFlag, returns
+// 0 if not found
+func (c *Context) GlobalDuration(name string) time.Duration {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupDuration(name, fs)
+	}
+	return 0
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f DurationFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f DurationFlag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		envValDuration, err := time.ParseDuration(envVal)
+		if err != nil {
+			return fmt.Errorf("could not parse %s as duration for flag %s: %s", envVal, f.Name, err)
+		}
+
+		f.Value = envValDuration
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.DurationVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Duration(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+func lookupDuration(name string, set *flag.FlagSet) time.Duration {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := time.ParseDuration(f.Value.String())
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/flag_float64.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// Float64Flag is a flag with type float64
+type Float64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       float64
+	Destination *float64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Float64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Float64Flag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f Float64Flag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f Float64Flag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f Float64Flag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f Float64Flag) GetValue() string {
+	return fmt.Sprintf("%f", f.Value)
+}
+
+// Float64 looks up the value of a local Float64Flag, returns
+// 0 if not found
+func (c *Context) Float64(name string) float64 {
+	return lookupFloat64(name, c.flagSet)
+}
+
+// GlobalFloat64 looks up the value of a global Float64Flag, returns
+// 0 if not found
+func (c *Context) GlobalFloat64(name string) float64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupFloat64(name, fs)
+	}
+	return 0
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Float64Flag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Float64Flag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		envValFloat, err := strconv.ParseFloat(envVal, 10)
+		if err != nil {
+			return fmt.Errorf("could not parse %s as float64 value for flag %s: %s", envVal, f.Name, err)
+		}
+
+		f.Value = envValFloat
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Float64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Float64(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+func lookupFloat64(name string, set *flag.FlagSet) float64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseFloat(f.Value.String(), 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/flag_generated.go

@@ -1,627 +0,0 @@
-package cli
-
-import (
-	"flag"
-	"strconv"
-	"time"
-)
-
-// WARNING: This file is generated!
-
-// BoolFlag is a flag with type bool
-type BoolFlag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Destination *bool
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f BoolFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f BoolFlag) GetName() string {
-	return f.Name
-}
-
-// Bool looks up the value of a local BoolFlag, returns
-// false if not found
-func (c *Context) Bool(name string) bool {
-	return lookupBool(name, c.flagSet)
-}
-
-// GlobalBool looks up the value of a global BoolFlag, returns
-// false if not found
-func (c *Context) GlobalBool(name string) bool {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupBool(name, fs)
-	}
-	return false
-}
-
-func lookupBool(name string, set *flag.FlagSet) bool {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := strconv.ParseBool(f.Value.String())
-		if err != nil {
-			return false
-		}
-		return parsed
-	}
-	return false
-}
-
-// BoolTFlag is a flag with type bool that is true by default
-type BoolTFlag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Destination *bool
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f BoolTFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f BoolTFlag) GetName() string {
-	return f.Name
-}
-
-// BoolT looks up the value of a local BoolTFlag, returns
-// false if not found
-func (c *Context) BoolT(name string) bool {
-	return lookupBoolT(name, c.flagSet)
-}
-
-// GlobalBoolT looks up the value of a global BoolTFlag, returns
-// false if not found
-func (c *Context) GlobalBoolT(name string) bool {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupBoolT(name, fs)
-	}
-	return false
-}
-
-func lookupBoolT(name string, set *flag.FlagSet) bool {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := strconv.ParseBool(f.Value.String())
-		if err != nil {
-			return false
-		}
-		return parsed
-	}
-	return false
-}
-
-// DurationFlag is a flag with type time.Duration (see https://golang.org/pkg/time/#ParseDuration)
-type DurationFlag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Value       time.Duration
-	Destination *time.Duration
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f DurationFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f DurationFlag) GetName() string {
-	return f.Name
-}
-
-// Duration looks up the value of a local DurationFlag, returns
-// 0 if not found
-func (c *Context) Duration(name string) time.Duration {
-	return lookupDuration(name, c.flagSet)
-}
-
-// GlobalDuration looks up the value of a global DurationFlag, returns
-// 0 if not found
-func (c *Context) GlobalDuration(name string) time.Duration {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupDuration(name, fs)
-	}
-	return 0
-}
-
-func lookupDuration(name string, set *flag.FlagSet) time.Duration {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := time.ParseDuration(f.Value.String())
-		if err != nil {
-			return 0
-		}
-		return parsed
-	}
-	return 0
-}
-
-// Float64Flag is a flag with type float64
-type Float64Flag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Value       float64
-	Destination *float64
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f Float64Flag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f Float64Flag) GetName() string {
-	return f.Name
-}
-
-// Float64 looks up the value of a local Float64Flag, returns
-// 0 if not found
-func (c *Context) Float64(name string) float64 {
-	return lookupFloat64(name, c.flagSet)
-}
-
-// GlobalFloat64 looks up the value of a global Float64Flag, returns
-// 0 if not found
-func (c *Context) GlobalFloat64(name string) float64 {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupFloat64(name, fs)
-	}
-	return 0
-}
-
-func lookupFloat64(name string, set *flag.FlagSet) float64 {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := strconv.ParseFloat(f.Value.String(), 64)
-		if err != nil {
-			return 0
-		}
-		return parsed
-	}
-	return 0
-}
-
-// GenericFlag is a flag with type Generic
-type GenericFlag struct {
-	Name   string
-	Usage  string
-	EnvVar string
-	Hidden bool
-	Value  Generic
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f GenericFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f GenericFlag) GetName() string {
-	return f.Name
-}
-
-// Generic looks up the value of a local GenericFlag, returns
-// nil if not found
-func (c *Context) Generic(name string) interface{} {
-	return lookupGeneric(name, c.flagSet)
-}
-
-// GlobalGeneric looks up the value of a global GenericFlag, returns
-// nil if not found
-func (c *Context) GlobalGeneric(name string) interface{} {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupGeneric(name, fs)
-	}
-	return nil
-}
-
-func lookupGeneric(name string, set *flag.FlagSet) interface{} {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := f.Value, error(nil)
-		if err != nil {
-			return nil
-		}
-		return parsed
-	}
-	return nil
-}
-
-// Int64Flag is a flag with type int64
-type Int64Flag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Value       int64
-	Destination *int64
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f Int64Flag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f Int64Flag) GetName() string {
-	return f.Name
-}
-
-// Int64 looks up the value of a local Int64Flag, returns
-// 0 if not found
-func (c *Context) Int64(name string) int64 {
-	return lookupInt64(name, c.flagSet)
-}
-
-// GlobalInt64 looks up the value of a global Int64Flag, returns
-// 0 if not found
-func (c *Context) GlobalInt64(name string) int64 {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupInt64(name, fs)
-	}
-	return 0
-}
-
-func lookupInt64(name string, set *flag.FlagSet) int64 {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
-		if err != nil {
-			return 0
-		}
-		return parsed
-	}
-	return 0
-}
-
-// IntFlag is a flag with type int
-type IntFlag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Value       int
-	Destination *int
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f IntFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f IntFlag) GetName() string {
-	return f.Name
-}
-
-// Int looks up the value of a local IntFlag, returns
-// 0 if not found
-func (c *Context) Int(name string) int {
-	return lookupInt(name, c.flagSet)
-}
-
-// GlobalInt looks up the value of a global IntFlag, returns
-// 0 if not found
-func (c *Context) GlobalInt(name string) int {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupInt(name, fs)
-	}
-	return 0
-}
-
-func lookupInt(name string, set *flag.FlagSet) int {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
-		if err != nil {
-			return 0
-		}
-		return int(parsed)
-	}
-	return 0
-}
-
-// IntSliceFlag is a flag with type *IntSlice
-type IntSliceFlag struct {
-	Name   string
-	Usage  string
-	EnvVar string
-	Hidden bool
-	Value  *IntSlice
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f IntSliceFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f IntSliceFlag) GetName() string {
-	return f.Name
-}
-
-// IntSlice looks up the value of a local IntSliceFlag, returns
-// nil if not found
-func (c *Context) IntSlice(name string) []int {
-	return lookupIntSlice(name, c.flagSet)
-}
-
-// GlobalIntSlice looks up the value of a global IntSliceFlag, returns
-// nil if not found
-func (c *Context) GlobalIntSlice(name string) []int {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupIntSlice(name, fs)
-	}
-	return nil
-}
-
-func lookupIntSlice(name string, set *flag.FlagSet) []int {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := (f.Value.(*IntSlice)).Value(), error(nil)
-		if err != nil {
-			return nil
-		}
-		return parsed
-	}
-	return nil
-}
-
-// Int64SliceFlag is a flag with type *Int64Slice
-type Int64SliceFlag struct {
-	Name   string
-	Usage  string
-	EnvVar string
-	Hidden bool
-	Value  *Int64Slice
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f Int64SliceFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f Int64SliceFlag) GetName() string {
-	return f.Name
-}
-
-// Int64Slice looks up the value of a local Int64SliceFlag, returns
-// nil if not found
-func (c *Context) Int64Slice(name string) []int64 {
-	return lookupInt64Slice(name, c.flagSet)
-}
-
-// GlobalInt64Slice looks up the value of a global Int64SliceFlag, returns
-// nil if not found
-func (c *Context) GlobalInt64Slice(name string) []int64 {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupInt64Slice(name, fs)
-	}
-	return nil
-}
-
-func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := (f.Value.(*Int64Slice)).Value(), error(nil)
-		if err != nil {
-			return nil
-		}
-		return parsed
-	}
-	return nil
-}
-
-// StringFlag is a flag with type string
-type StringFlag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Value       string
-	Destination *string
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f StringFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f StringFlag) GetName() string {
-	return f.Name
-}
-
-// String looks up the value of a local StringFlag, returns
-// "" if not found
-func (c *Context) String(name string) string {
-	return lookupString(name, c.flagSet)
-}
-
-// GlobalString looks up the value of a global StringFlag, returns
-// "" if not found
-func (c *Context) GlobalString(name string) string {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupString(name, fs)
-	}
-	return ""
-}
-
-func lookupString(name string, set *flag.FlagSet) string {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := f.Value.String(), error(nil)
-		if err != nil {
-			return ""
-		}
-		return parsed
-	}
-	return ""
-}
-
-// StringSliceFlag is a flag with type *StringSlice
-type StringSliceFlag struct {
-	Name   string
-	Usage  string
-	EnvVar string
-	Hidden bool
-	Value  *StringSlice
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f StringSliceFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f StringSliceFlag) GetName() string {
-	return f.Name
-}
-
-// StringSlice looks up the value of a local StringSliceFlag, returns
-// nil if not found
-func (c *Context) StringSlice(name string) []string {
-	return lookupStringSlice(name, c.flagSet)
-}
-
-// GlobalStringSlice looks up the value of a global StringSliceFlag, returns
-// nil if not found
-func (c *Context) GlobalStringSlice(name string) []string {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupStringSlice(name, fs)
-	}
-	return nil
-}
-
-func lookupStringSlice(name string, set *flag.FlagSet) []string {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := (f.Value.(*StringSlice)).Value(), error(nil)
-		if err != nil {
-			return nil
-		}
-		return parsed
-	}
-	return nil
-}
-
-// Uint64Flag is a flag with type uint64
-type Uint64Flag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Value       uint64
-	Destination *uint64
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f Uint64Flag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f Uint64Flag) GetName() string {
-	return f.Name
-}
-
-// Uint64 looks up the value of a local Uint64Flag, returns
-// 0 if not found
-func (c *Context) Uint64(name string) uint64 {
-	return lookupUint64(name, c.flagSet)
-}
-
-// GlobalUint64 looks up the value of a global Uint64Flag, returns
-// 0 if not found
-func (c *Context) GlobalUint64(name string) uint64 {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupUint64(name, fs)
-	}
-	return 0
-}
-
-func lookupUint64(name string, set *flag.FlagSet) uint64 {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
-		if err != nil {
-			return 0
-		}
-		return parsed
-	}
-	return 0
-}
-
-// UintFlag is a flag with type uint
-type UintFlag struct {
-	Name        string
-	Usage       string
-	EnvVar      string
-	Hidden      bool
-	Value       uint
-	Destination *uint
-}
-
-// String returns a readable representation of this value
-// (for usage defaults)
-func (f UintFlag) String() string {
-	return FlagStringer(f)
-}
-
-// GetName returns the name of the flag
-func (f UintFlag) GetName() string {
-	return f.Name
-}
-
-// Uint looks up the value of a local UintFlag, returns
-// 0 if not found
-func (c *Context) Uint(name string) uint {
-	return lookupUint(name, c.flagSet)
-}
-
-// GlobalUint looks up the value of a global UintFlag, returns
-// 0 if not found
-func (c *Context) GlobalUint(name string) uint {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupUint(name, fs)
-	}
-	return 0
-}
-
-func lookupUint(name string, set *flag.FlagSet) uint {
-	f := set.Lookup(name)
-	if f != nil {
-		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
-		if err != nil {
-			return 0
-		}
-		return uint(parsed)
-	}
-	return 0
-}

vendor/github.com/urfave/cli/flag_generic.go

@@ -0,0 +1,110 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+)
+
+// Generic is a generic parseable type identified by a specific flag
+type Generic interface {
+	Set(value string) error
+	String() string
+}
+
+// GenericFlag is a flag with type Generic
+type GenericFlag struct {
+	Name      string
+	Usage     string
+	EnvVar    string
+	FilePath  string
+	Required  bool
+	Hidden    bool
+	TakesFile bool
+	Value     Generic
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f GenericFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f GenericFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f GenericFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f GenericFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f GenericFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f GenericFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply takes the flagset and calls Set on the generic flag with the value
+// provided by the user for parsing by the flag
+// Ignores parsing errors
+func (f GenericFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError takes the flagset and calls Set on the generic flag with the value
+// provided by the user for parsing by the flag
+func (f GenericFlag) ApplyWithError(set *flag.FlagSet) error {
+	val := f.Value
+	if fileEnvVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		if err := val.Set(fileEnvVal); err != nil {
+			return fmt.Errorf("could not parse %s as value for flag %s: %s", fileEnvVal, f.Name, err)
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		set.Var(f.Value, name, f.Usage)
+	})
+
+	return nil
+}
+
+// Generic looks up the value of a local GenericFlag, returns
+// nil if not found
+func (c *Context) Generic(name string) interface{} {
+	return lookupGeneric(name, c.flagSet)
+}
+
+// GlobalGeneric looks up the value of a global GenericFlag, returns
+// nil if not found
+func (c *Context) GlobalGeneric(name string) interface{} {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupGeneric(name, fs)
+	}
+	return nil
+}
+
+func lookupGeneric(name string, set *flag.FlagSet) interface{} {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value, error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/flag_int.go

@@ -0,0 +1,105 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// IntFlag is a flag with type int
+type IntFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       int
+	Destination *int
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f IntFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f IntFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f IntFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f IntFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f IntFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f IntFlag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f IntFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f IntFlag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		envValInt, err := strconv.ParseInt(envVal, 0, 64)
+		if err != nil {
+			return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
+		}
+		f.Value = int(envValInt)
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.IntVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Int(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Int looks up the value of a local IntFlag, returns
+// 0 if not found
+func (c *Context) Int(name string) int {
+	return lookupInt(name, c.flagSet)
+}
+
+// GlobalInt looks up the value of a global IntFlag, returns
+// 0 if not found
+func (c *Context) GlobalInt(name string) int {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt(name, fs)
+	}
+	return 0
+}
+
+func lookupInt(name string, set *flag.FlagSet) int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return int(parsed)
+	}
+	return 0
+}

vendor/github.com/urfave/cli/flag_int64.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// Int64Flag is a flag with type int64
+type Int64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       int64
+	Destination *int64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Int64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Int64Flag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f Int64Flag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f Int64Flag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f Int64Flag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f Int64Flag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Int64Flag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Int64Flag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		envValInt, err := strconv.ParseInt(envVal, 0, 64)
+		if err != nil {
+			return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
+		}
+
+		f.Value = envValInt
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Int64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Int64(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Int64 looks up the value of a local Int64Flag, returns
+// 0 if not found
+func (c *Context) Int64(name string) int64 {
+	return lookupInt64(name, c.flagSet)
+}
+
+// GlobalInt64 looks up the value of a global Int64Flag, returns
+// 0 if not found
+func (c *Context) GlobalInt64(name string) int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64(name, fs)
+	}
+	return 0
+}
+
+func lookupInt64(name string, set *flag.FlagSet) int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/flag_int64_slice.go

@@ -0,0 +1,141 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Int64Slice is an opaque type for []int to satisfy flag.Value and flag.Getter
+type Int64Slice []int64
+
+// Set parses the value into an integer and appends it to the list of values
+func (f *Int64Slice) Set(value string) error {
+	tmp, err := strconv.ParseInt(value, 10, 64)
+	if err != nil {
+		return err
+	}
+	*f = append(*f, tmp)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *Int64Slice) String() string {
+	return fmt.Sprintf("%#v", *f)
+}
+
+// Value returns the slice of ints set by this flag
+func (f *Int64Slice) Value() []int64 {
+	return *f
+}
+
+// Get returns the slice of ints set by this flag
+func (f *Int64Slice) Get() interface{} {
+	return *f
+}
+
+// Int64SliceFlag is a flag with type *Int64Slice
+type Int64SliceFlag struct {
+	Name     string
+	Usage    string
+	EnvVar   string
+	FilePath string
+	Required bool
+	Hidden   bool
+	Value    *Int64Slice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Int64SliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Int64SliceFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f Int64SliceFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f Int64SliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f Int64SliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f Int64SliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Int64SliceFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Int64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		newVal := &Int64Slice{}
+		for _, s := range strings.Split(envVal, ",") {
+			s = strings.TrimSpace(s)
+			if err := newVal.Set(s); err != nil {
+				return fmt.Errorf("could not parse %s as int64 slice value for flag %s: %s", envVal, f.Name, err)
+			}
+		}
+		if f.Value == nil {
+			f.Value = newVal
+		} else {
+			*f.Value = *newVal
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Value == nil {
+			f.Value = &Int64Slice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	})
+	return nil
+}
+
+// Int64Slice looks up the value of a local Int64SliceFlag, returns
+// nil if not found
+func (c *Context) Int64Slice(name string) []int64 {
+	return lookupInt64Slice(name, c.flagSet)
+}
+
+// GlobalInt64Slice looks up the value of a global Int64SliceFlag, returns
+// nil if not found
+func (c *Context) GlobalInt64Slice(name string) []int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64Slice(name, fs)
+	}
+	return nil
+}
+
+func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*Int64Slice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/flag_int_slice.go

@@ -0,0 +1,142 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// IntSlice is an opaque type for []int to satisfy flag.Value and flag.Getter
+type IntSlice []int
+
+// Set parses the value into an integer and appends it to the list of values
+func (f *IntSlice) Set(value string) error {
+	tmp, err := strconv.Atoi(value)
+	if err != nil {
+		return err
+	}
+	*f = append(*f, tmp)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *IntSlice) String() string {
+	return fmt.Sprintf("%#v", *f)
+}
+
+// Value returns the slice of ints set by this flag
+func (f *IntSlice) Value() []int {
+	return *f
+}
+
+// Get returns the slice of ints set by this flag
+func (f *IntSlice) Get() interface{} {
+	return *f
+}
+
+// IntSliceFlag is a flag with type *IntSlice
+type IntSliceFlag struct {
+	Name     string
+	Usage    string
+	EnvVar   string
+	FilePath string
+	Required bool
+	Hidden   bool
+	Value    *IntSlice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f IntSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f IntSliceFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f IntSliceFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f IntSliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f IntSliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f IntSliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f IntSliceFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f IntSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		newVal := &IntSlice{}
+		for _, s := range strings.Split(envVal, ",") {
+			s = strings.TrimSpace(s)
+			if err := newVal.Set(s); err != nil {
+				return fmt.Errorf("could not parse %s as int slice value for flag %s: %s", envVal, f.Name, err)
+			}
+		}
+		if f.Value == nil {
+			f.Value = newVal
+		} else {
+			*f.Value = *newVal
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Value == nil {
+			f.Value = &IntSlice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	})
+
+	return nil
+}
+
+// IntSlice looks up the value of a local IntSliceFlag, returns
+// nil if not found
+func (c *Context) IntSlice(name string) []int {
+	return lookupIntSlice(name, c.flagSet)
+}
+
+// GlobalIntSlice looks up the value of a global IntSliceFlag, returns
+// nil if not found
+func (c *Context) GlobalIntSlice(name string) []int {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupIntSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupIntSlice(name string, set *flag.FlagSet) []int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*IntSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/flag_string.go

@@ -0,0 +1,98 @@
+package cli
+
+import "flag"
+
+// StringFlag is a flag with type string
+type StringFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	TakesFile   bool
+	Value       string
+	Destination *string
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f StringFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f StringFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f StringFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f StringFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f StringFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f StringFlag) GetValue() string {
+	return f.Value
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f StringFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f StringFlag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		f.Value = envVal
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.StringVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.String(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// String looks up the value of a local StringFlag, returns
+// "" if not found
+func (c *Context) String(name string) string {
+	return lookupString(name, c.flagSet)
+}
+
+// GlobalString looks up the value of a global StringFlag, returns
+// "" if not found
+func (c *Context) GlobalString(name string) string {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupString(name, fs)
+	}
+	return ""
+}
+
+func lookupString(name string, set *flag.FlagSet) string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value.String(), error(nil)
+		if err != nil {
+			return ""
+		}
+		return parsed
+	}
+	return ""
+}

vendor/github.com/urfave/cli/flag_string_slice.go

@@ -0,0 +1,138 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strings"
+)
+
+// StringSlice is an opaque type for []string to satisfy flag.Value and flag.Getter
+type StringSlice []string
+
+// Set appends the string value to the list of values
+func (f *StringSlice) Set(value string) error {
+	*f = append(*f, value)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *StringSlice) String() string {
+	return fmt.Sprintf("%s", *f)
+}
+
+// Value returns the slice of strings set by this flag
+func (f *StringSlice) Value() []string {
+	return *f
+}
+
+// Get returns the slice of strings set by this flag
+func (f *StringSlice) Get() interface{} {
+	return *f
+}
+
+// StringSliceFlag is a flag with type *StringSlice
+type StringSliceFlag struct {
+	Name      string
+	Usage     string
+	EnvVar    string
+	FilePath  string
+	Required  bool
+	Hidden    bool
+	TakesFile bool
+	Value     *StringSlice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f StringSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f StringSliceFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f StringSliceFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f StringSliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f StringSliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f StringSliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f StringSliceFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f StringSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		newVal := &StringSlice{}
+		for _, s := range strings.Split(envVal, ",") {
+			s = strings.TrimSpace(s)
+			if err := newVal.Set(s); err != nil {
+				return fmt.Errorf("could not parse %s as string value for flag %s: %s", envVal, f.Name, err)
+			}
+		}
+		if f.Value == nil {
+			f.Value = newVal
+		} else {
+			*f.Value = *newVal
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Value == nil {
+			f.Value = &StringSlice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	})
+
+	return nil
+}
+
+// StringSlice looks up the value of a local StringSliceFlag, returns
+// nil if not found
+func (c *Context) StringSlice(name string) []string {
+	return lookupStringSlice(name, c.flagSet)
+}
+
+// GlobalStringSlice looks up the value of a global StringSliceFlag, returns
+// nil if not found
+func (c *Context) GlobalStringSlice(name string) []string {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupStringSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupStringSlice(name string, set *flag.FlagSet) []string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*StringSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/flag_uint.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// UintFlag is a flag with type uint
+type UintFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       uint
+	Destination *uint
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f UintFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f UintFlag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f UintFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f UintFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f UintFlag) GetUsage() string {
+	return f.Usage
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f UintFlag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f UintFlag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		envValInt, err := strconv.ParseUint(envVal, 0, 64)
+		if err != nil {
+			return fmt.Errorf("could not parse %s as uint value for flag %s: %s", envVal, f.Name, err)
+		}
+
+		f.Value = uint(envValInt)
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.UintVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Uint(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f UintFlag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Uint looks up the value of a local UintFlag, returns
+// 0 if not found
+func (c *Context) Uint(name string) uint {
+	return lookupUint(name, c.flagSet)
+}
+
+// GlobalUint looks up the value of a global UintFlag, returns
+// 0 if not found
+func (c *Context) GlobalUint(name string) uint {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint(name, fs)
+	}
+	return 0
+}
+
+func lookupUint(name string, set *flag.FlagSet) uint {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return uint(parsed)
+	}
+	return 0
+}

vendor/github.com/urfave/cli/flag_uint64.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// Uint64Flag is a flag with type uint64
+type Uint64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       uint64
+	Destination *uint64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Uint64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Uint64Flag) GetName() string {
+	return f.Name
+}
+
+// IsRequired returns whether or not the flag is required
+func (f Uint64Flag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f Uint64Flag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f Uint64Flag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f Uint64Flag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Uint64Flag) Apply(set *flag.FlagSet) {
+	_ = f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
+	if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
+		envValInt, err := strconv.ParseUint(envVal, 0, 64)
+		if err != nil {
+			return fmt.Errorf("could not parse %s as uint64 value for flag %s: %s", envVal, f.Name, err)
+		}
+
+		f.Value = envValInt
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Uint64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Uint64(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Uint64 looks up the value of a local Uint64Flag, returns
+// 0 if not found
+func (c *Context) Uint64(name string) uint64 {
+	return lookupUint64(name, c.flagSet)
+}
+
+// GlobalUint64 looks up the value of a global Uint64Flag, returns
+// 0 if not found
+func (c *Context) GlobalUint64(name string) uint64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint64(name, fs)
+	}
+	return 0
+}
+
+func lookupUint64(name string, set *flag.FlagSet) uint64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/funcs.go

@@ -23,6 +23,22 @@ type CommandNotFoundFunc func(*Context, string)
 // is displayed and the execution is interrupted.
 type OnUsageErrorFunc func(context *Context, err error, isSubcommand bool) error
 
+// ExitErrHandlerFunc is executed if provided in order to handle ExitError values
+// returned by Actions and Before/After functions.
+type ExitErrHandlerFunc func(context *Context, err error)
+
 // FlagStringFunc is used by the help generation to display a flag, which is
 // expected to be a single line.
 type FlagStringFunc func(Flag) string
+
+// FlagNamePrefixFunc is used by the default FlagStringFunc to create prefix
+// text for a flag's full name.
+type FlagNamePrefixFunc func(fullName, placeholder string) string
+
+// FlagEnvHintFunc is used by the default FlagStringFunc to annotate flag help
+// with the environment variable details.
+type FlagEnvHintFunc func(envVar, str string) string
+
+// FlagFileHintFunc is used by the default FlagStringFunc to annotate flag help
+// with the file path details.
+type FlagFileHintFunc func(filePath, str string) string

vendor/github.com/urfave/cli/generate-flag-types

@@ -1,255 +0,0 @@
-#!/usr/bin/env python
-"""
-The flag types that ship with the cli library have many things in common, and
-so we can take advantage of the `go generate` command to create much of the
-source code from a list of definitions.  These definitions attempt to cover
-the parts that vary between flag types, and should evolve as needed.
-
-An example of the minimum definition needed is:
-
-    {
-      "name": "SomeType",
-      "type": "sometype",
-      "context_default": "nil"
-    }
-
-In this example, the code generated for the `cli` package will include a type
-named `SomeTypeFlag` that is expected to wrap a value of type `sometype`.
-Fetching values by name via `*cli.Context` will default to a value of `nil`.
-
-A more complete, albeit somewhat redundant, example showing all available
-definition keys is:
-
-    {
-      "name": "VeryMuchType",
-      "type": "*VeryMuchType",
-      "value": true,
-      "dest": false,
-      "doctail": " which really only wraps a []float64, oh well!",
-      "context_type": "[]float64",
-      "context_default": "nil",
-      "parser": "parseVeryMuchType(f.Value.String())",
-      "parser_cast": "[]float64(parsed)"
-    }
-
-The meaning of each field is as follows:
-
-               name (string) - The type "name", which will be suffixed with
-                               `Flag` when generating the type definition
-                               for `cli` and the wrapper type for `altsrc`
-               type (string) - The type that the generated `Flag` type for `cli`
-                               is expected to "contain" as its `.Value` member
-                value (bool) - Should the generated `cli` type have a `Value`
-                               member?
-                 dest (bool) - Should the generated `cli` type support a
-                               destination pointer?
-            doctail (string) - Additional docs for the `cli` flag type comment
-       context_type (string) - The literal type used in the `*cli.Context`
-                               reader func signature
-    context_default (string) - The literal value used as the default by the
-                               `*cli.Context` reader funcs when no value is
-                               present
-             parser (string) - Literal code used to parse the flag `f`,
-                               expected to have a return signature of
-                               (value, error)
-        parser_cast (string) - Literal code used to cast the `parsed` value
-                               returned from the `parser` code
-"""
-
-from __future__ import print_function, unicode_literals
-
-import argparse
-import json
-import os
-import subprocess
-import sys
-import tempfile
-import textwrap
-
-
-class _FancyFormatter(argparse.ArgumentDefaultsHelpFormatter,
-                      argparse.RawDescriptionHelpFormatter):
-    pass
-
-
-def main(sysargs=sys.argv[:]):
-    parser = argparse.ArgumentParser(
-        description='Generate flag type code!',
-        formatter_class=_FancyFormatter)
-    parser.add_argument(
-        'package',
-        type=str, default='cli', choices=_WRITEFUNCS.keys(),
-        help='Package for which flag types will be generated'
-    )
-    parser.add_argument(
-        '-i', '--in-json',
-        type=argparse.FileType('r'),
-        default=sys.stdin,
-        help='Input JSON file which defines each type to be generated'
-    )
-    parser.add_argument(
-        '-o', '--out-go',
-        type=argparse.FileType('w'),
-        default=sys.stdout,
-        help='Output file/stream to which generated source will be written'
-    )
-    parser.epilog = __doc__
-
-    args = parser.parse_args(sysargs[1:])
-    _generate_flag_types(_WRITEFUNCS[args.package], args.out_go, args.in_json)
-    return 0
-
-
-def _generate_flag_types(writefunc, output_go, input_json):
-    types = json.load(input_json)
-
-    tmp = tempfile.NamedTemporaryFile(suffix='.go', delete=False)
-    writefunc(tmp, types)
-    tmp.close()
-
-    new_content = subprocess.check_output(
-        ['goimports', tmp.name]
-    ).decode('utf-8')
-
-    print(new_content, file=output_go, end='')
-    output_go.flush()
-    os.remove(tmp.name)
-
-
-def _set_typedef_defaults(typedef):
-    typedef.setdefault('doctail', '')
-    typedef.setdefault('context_type', typedef['type'])
-    typedef.setdefault('dest', True)
-    typedef.setdefault('value', True)
-    typedef.setdefault('parser', 'f.Value, error(nil)')
-    typedef.setdefault('parser_cast', 'parsed')
-
-
-def _write_cli_flag_types(outfile, types):
-    _fwrite(outfile, """\
-        package cli
-
-        // WARNING: This file is generated!
-
-        """)
-
-    for typedef in types:
-        _set_typedef_defaults(typedef)
-
-        _fwrite(outfile, """\
-        // {name}Flag is a flag with type {type}{doctail}
-        type {name}Flag struct {{
-            Name string
-            Usage string
-            EnvVar string
-            Hidden bool
-        """.format(**typedef))
-
-        if typedef['value']:
-            _fwrite(outfile, """\
-            Value {type}
-            """.format(**typedef))
-
-        if typedef['dest']:
-            _fwrite(outfile, """\
-            Destination *{type}
-            """.format(**typedef))
-
-        _fwrite(outfile, "\n}\n\n")
-
-        _fwrite(outfile, """\
-            // String returns a readable representation of this value
-            // (for usage defaults)
-            func (f {name}Flag) String() string {{
-                return FlagStringer(f)
-            }}
-
-            // GetName returns the name of the flag
-            func (f {name}Flag) GetName() string {{
-                return f.Name
-            }}
-
-            // {name} looks up the value of a local {name}Flag, returns
-            // {context_default} if not found
-            func (c *Context) {name}(name string) {context_type} {{
-                return lookup{name}(name, c.flagSet)
-            }}
-
-            // Global{name} looks up the value of a global {name}Flag, returns
-            // {context_default} if not found
-            func (c *Context) Global{name}(name string) {context_type} {{
-                if fs := lookupGlobalFlagSet(name, c); fs != nil {{
-                    return lookup{name}(name, fs)
-                }}
-                return {context_default}
-            }}
-
-            func lookup{name}(name string, set *flag.FlagSet) {context_type} {{
-                f := set.Lookup(name)
-                if f != nil {{
-                    parsed, err := {parser}
-                    if err != nil {{
-                        return {context_default}
-                    }}
-                    return {parser_cast}
-                }}
-                return {context_default}
-            }}
-            """.format(**typedef))
-
-
-def _write_altsrc_flag_types(outfile, types):
-    _fwrite(outfile, """\
-        package altsrc
-
-        import (
-            "gopkg.in/urfave/cli.v1"
-        )
-
-        // WARNING: This file is generated!
-
-        """)
-
-    for typedef in types:
-        _set_typedef_defaults(typedef)
-
-        _fwrite(outfile, """\
-        // {name}Flag is the flag type that wraps cli.{name}Flag to allow
-        // for other values to be specified
-        type {name}Flag struct {{
-            cli.{name}Flag
-            set *flag.FlagSet
-        }}
-
-        // New{name}Flag creates a new {name}Flag
-        func New{name}Flag(fl cli.{name}Flag) *{name}Flag {{
-            return &{name}Flag{{{name}Flag: fl, set: nil}}
-        }}
-
-        // Apply saves the flagSet for later usage calls, then calls the
-        // wrapped {name}Flag.Apply
-        func (f *{name}Flag) Apply(set *flag.FlagSet) {{
-            f.set = set
-            f.{name}Flag.Apply(set)
-        }}
-
-        // ApplyWithError saves the flagSet for later usage calls, then calls the
-        // wrapped {name}Flag.ApplyWithError
-        func (f *{name}Flag) ApplyWithError(set *flag.FlagSet) error {{
-            f.set = set
-            return f.{name}Flag.ApplyWithError(set)
-        }}
-        """.format(**typedef))
-
-
-def _fwrite(outfile, text):
-    print(textwrap.dedent(text), end='', file=outfile)
-
-
-_WRITEFUNCS = {
-    'cli': _write_cli_flag_types,
-    'altsrc': _write_altsrc_flag_types
-}
-
-if __name__ == '__main__':
-    sys.exit(main())

vendor/github.com/urfave/cli/go.mod

@@ -0,0 +1,9 @@
+module github.com/urfave/cli
+
+go 1.11
+
+require (
+	github.com/BurntSushi/toml v0.3.1
+	github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d
+	gopkg.in/yaml.v2 v2.2.2
+)

vendor/github.com/urfave/cli/go.sum

@@ -0,0 +1,14 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

vendor/github.com/urfave/cli/help.go

@@ -7,77 +7,9 @@ import (
 	"strings"
 	"text/tabwriter"
 	"text/template"
+	"unicode/utf8"
 )
 
-// AppHelpTemplate is the text template for the Default help topic.
-// cli.go uses text/template to render templates. You can
-// render custom help text by setting this variable.
-var AppHelpTemplate = `NAME:
-   {{.Name}}{{if .Usage}} - {{.Usage}}{{end}}
-
-USAGE:
-   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Version}}{{if not .HideVersion}}
-
-VERSION:
-   {{.Version}}{{end}}{{end}}{{if .Description}}
-
-DESCRIPTION:
-   {{.Description}}{{end}}{{if len .Authors}}
-
-AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
-   {{range $index, $author := .Authors}}{{if $index}}
-   {{end}}{{$author}}{{end}}{{end}}{{if .VisibleCommands}}
-
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{end}}{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
-
-GLOBAL OPTIONS:
-   {{range $index, $option := .VisibleFlags}}{{if $index}}
-   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
-
-COPYRIGHT:
-   {{.Copyright}}{{end}}
-`
-
-// CommandHelpTemplate is the text template for the command help topic.
-// cli.go uses text/template to render templates. You can
-// render custom help text by setting this variable.
-var CommandHelpTemplate = `NAME:
-   {{.HelpName}} - {{.Usage}}
-
-USAGE:
-   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Category}}
-
-CATEGORY:
-   {{.Category}}{{end}}{{if .Description}}
-
-DESCRIPTION:
-   {{.Description}}{{end}}{{if .VisibleFlags}}
-
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}
-   {{end}}{{end}}
-`
-
-// SubcommandHelpTemplate is the text template for the subcommand help topic.
-// cli.go uses text/template to render templates. You can
-// render custom help text by setting this variable.
-var SubcommandHelpTemplate = `NAME:
-   {{.HelpName}} - {{if .Description}}{{.Description}}{{else}}{{.Usage}}{{end}}
-
-USAGE:
-   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
-
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{end}}{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}
-{{end}}{{if .VisibleFlags}}
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}
-   {{end}}{{end}}
-`
-
 var helpCommand = Command{
 	Name:      "help",
 	Aliases:   []string{"h"},
@@ -89,7 +21,7 @@ var helpCommand = Command{
 			return ShowCommandHelp(c, args.First())
 		}
 
-		ShowAppHelp(c)
+		_ = ShowAppHelp(c)
 		return nil
 	},
 }
@@ -129,7 +61,7 @@ var VersionPrinter = printVersion
 
 // ShowAppHelpAndExit - Prints the list of subcommands for the app and exits with exit code.
 func ShowAppHelpAndExit(c *Context, exitCode int) {
-	ShowAppHelp(c)
+	_ = ShowAppHelp(c)
 	os.Exit(exitCode)
 }
 
@@ -153,19 +85,94 @@ func ShowAppHelp(c *Context) (err error) {
 
 // DefaultAppComplete prints the list of subcommands as the default app completion method
 func DefaultAppComplete(c *Context) {
-	for _, command := range c.App.Commands {
+	DefaultCompleteWithFlags(nil)(c)
+}
+
+func printCommandSuggestions(commands []Command, writer io.Writer) {
+	for _, command := range commands {
 		if command.Hidden {
 			continue
 		}
-		for _, name := range command.Names() {
-			fmt.Fprintln(c.App.Writer, name)
+		if os.Getenv("_CLI_ZSH_AUTOCOMPLETE_HACK") == "1" {
+			for _, name := range command.Names() {
+				_, _ = fmt.Fprintf(writer, "%s:%s\n", name, command.Usage)
+			}
+		} else {
+			for _, name := range command.Names() {
+				_, _ = fmt.Fprintf(writer, "%s\n", name)
+			}
+		}
+	}
+}
+
+func cliArgContains(flagName string) bool {
+	for _, name := range strings.Split(flagName, ",") {
+		name = strings.TrimSpace(name)
+		count := utf8.RuneCountInString(name)
+		if count > 2 {
+			count = 2
+		}
+		flag := fmt.Sprintf("%s%s", strings.Repeat("-", count), name)
+		for _, a := range os.Args {
+			if a == flag {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func printFlagSuggestions(lastArg string, flags []Flag, writer io.Writer) {
+	cur := strings.TrimPrefix(lastArg, "-")
+	cur = strings.TrimPrefix(cur, "-")
+	for _, flag := range flags {
+		if bflag, ok := flag.(BoolFlag); ok && bflag.Hidden {
+			continue
+		}
+		for _, name := range strings.Split(flag.GetName(), ",") {
+			name = strings.TrimSpace(name)
+			// this will get total count utf8 letters in flag name
+			count := utf8.RuneCountInString(name)
+			if count > 2 {
+				count = 2 // resuse this count to generate single - or -- in flag completion
+			}
+			// if flag name has more than one utf8 letter and last argument in cli has -- prefix then
+			// skip flag completion for short flags example -v or -x
+			if strings.HasPrefix(lastArg, "--") && count == 1 {
+				continue
+			}
+			// match if last argument matches this flag and it is not repeated
+			if strings.HasPrefix(name, cur) && cur != name && !cliArgContains(flag.GetName()) {
+				flagCompletion := fmt.Sprintf("%s%s", strings.Repeat("-", count), name)
+				_, _ = fmt.Fprintln(writer, flagCompletion)
+			}
+		}
+	}
+}
+
+func DefaultCompleteWithFlags(cmd *Command) func(c *Context) {
+	return func(c *Context) {
+		if len(os.Args) > 2 {
+			lastArg := os.Args[len(os.Args)-2]
+			if strings.HasPrefix(lastArg, "-") {
+				printFlagSuggestions(lastArg, c.App.Flags, c.App.Writer)
+				if cmd != nil {
+					printFlagSuggestions(lastArg, cmd.Flags, c.App.Writer)
+				}
+				return
+			}
+		}
+		if cmd != nil {
+			printCommandSuggestions(cmd.Subcommands, c.App.Writer)
+		} else {
+			printCommandSuggestions(c.App.Commands, c.App.Writer)
 		}
 	}
 }
 
 // ShowCommandHelpAndExit - exits with code after showing help
 func ShowCommandHelpAndExit(c *Context, command string, code int) {
-	ShowCommandHelp(c, command)
+	_ = ShowCommandHelp(c, command)
 	os.Exit(code)
 }
 
@@ -207,7 +214,7 @@ func ShowVersion(c *Context) {
 }
 
 func printVersion(c *Context) {
-	fmt.Fprintf(c.App.Writer, "%v version %v\n", c.App.Name, c.App.Version)
+	_, _ = fmt.Fprintf(c.App.Writer, "%v version %v\n", c.App.Name, c.App.Version)
 }
 
 // ShowCompletions prints the lists of commands within a given context
@@ -221,19 +228,22 @@ func ShowCompletions(c *Context) {
 // ShowCommandCompletions prints the custom completions for a given command
 func ShowCommandCompletions(ctx *Context, command string) {
 	c := ctx.App.Command(command)
-	if c != nil && c.BashComplete != nil {
-		c.BashComplete(ctx)
+	if c != nil {
+		if c.BashComplete != nil {
+			c.BashComplete(ctx)
+		} else {
+			DefaultCompleteWithFlags(c)(ctx)
+		}
 	}
+
 }
 
 func printHelpCustom(out io.Writer, templ string, data interface{}, customFunc map[string]interface{}) {
 	funcMap := template.FuncMap{
 		"join": strings.Join,
 	}
-	if customFunc != nil {
-		for key, value := range customFunc {
-			funcMap[key] = value
-		}
+	for key, value := range customFunc {
+		funcMap[key] = value
 	}
 
 	w := tabwriter.NewWriter(out, 1, 8, 2, ' ', 0)
@@ -243,11 +253,11 @@ func printHelpCustom(out io.Writer, templ string, data interface{}, customFunc m
 		// If the writer is closed, t.Execute will fail, and there's nothing
 		// we can do to recover.
 		if os.Getenv("CLI_TEMPLATE_ERROR_DEBUG") != "" {
-			fmt.Fprintf(ErrWriter, "CLI TEMPLATE ERROR: %#v\n", err)
+			_, _ = fmt.Fprintf(ErrWriter, "CLI TEMPLATE ERROR: %#v\n", err)
 		}
 		return
 	}
-	w.Flush()
+	_ = w.Flush()
 }
 
 func printHelp(out io.Writer, templ string, data interface{}) {
@@ -280,7 +290,7 @@ func checkHelp(c *Context) bool {
 
 func checkCommandHelp(c *Context, name string) bool {
 	if c.Bool("h") || c.Bool("help") {
-		ShowCommandHelp(c, name)
+		_ = ShowCommandHelp(c, name)
 		return true
 	}
 
@@ -289,7 +299,7 @@ func checkCommandHelp(c *Context, name string) bool {
 
 func checkSubcommandHelp(c *Context) bool {
 	if c.Bool("h") || c.Bool("help") {
-		ShowSubcommandHelp(c)
+		_ = ShowSubcommandHelp(c)
 		return true
 	}
 

vendor/github.com/urfave/cli/parse.go

@@ -0,0 +1,80 @@
+package cli
+
+import (
+	"flag"
+	"strings"
+)
+
+type iterativeParser interface {
+	newFlagSet() (*flag.FlagSet, error)
+	useShortOptionHandling() bool
+}
+
+// To enable short-option handling (e.g., "-it" vs "-i -t") we have to
+// iteratively catch parsing errors.  This way we achieve LR parsing without
+// transforming any arguments. Otherwise, there is no way we can discriminate
+// combined short options from common arguments that should be left untouched.
+func parseIter(ip iterativeParser, args []string) (*flag.FlagSet, error) {
+	for {
+		set, err := ip.newFlagSet()
+		if err != nil {
+			return nil, err
+		}
+
+		err = set.Parse(args)
+		if !ip.useShortOptionHandling() || err == nil {
+			return set, err
+		}
+
+		errStr := err.Error()
+		trimmed := strings.TrimPrefix(errStr, "flag provided but not defined: ")
+		if errStr == trimmed {
+			return nil, err
+		}
+
+		// regenerate the initial args with the split short opts
+		newArgs := []string{}
+		for i, arg := range args {
+			if arg != trimmed {
+				newArgs = append(newArgs, arg)
+				continue
+			}
+
+			shortOpts := splitShortOptions(set, trimmed)
+			if len(shortOpts) == 1 {
+				return nil, err
+			}
+
+			// add each short option and all remaining arguments
+			newArgs = append(newArgs, shortOpts...)
+			newArgs = append(newArgs, args[i+1:]...)
+			args = newArgs
+		}
+	}
+}
+
+func splitShortOptions(set *flag.FlagSet, arg string) []string {
+	shortFlagsExist := func(s string) bool {
+		for _, c := range s[1:] {
+			if f := set.Lookup(string(c)); f == nil {
+				return false
+			}
+		}
+		return true
+	}
+
+	if !isSplittable(arg) || !shortFlagsExist(arg) {
+		return []string{arg}
+	}
+
+	separated := make([]string, 0, len(arg)-1)
+	for _, flagChar := range arg[1:] {
+		separated = append(separated, "-"+string(flagChar))
+	}
+
+	return separated
+}
+
+func isSplittable(flagArg string) bool {
+	return strings.HasPrefix(flagArg, "-") && !strings.HasPrefix(flagArg, "--") && len(flagArg) > 2
+}

vendor/github.com/urfave/cli/runtests

@@ -1,122 +0,0 @@
-#!/usr/bin/env python
-from __future__ import print_function
-
-import argparse
-import os
-import sys
-import tempfile
-
-from subprocess import check_call, check_output
-
-
-PACKAGE_NAME = os.environ.get(
-    'CLI_PACKAGE_NAME', 'github.com/urfave/cli'
-)
-
-
-def main(sysargs=sys.argv[:]):
-    targets = {
-        'vet': _vet,
-        'test': _test,
-        'gfmrun': _gfmrun,
-        'toc': _toc,
-        'gen': _gen,
-    }
-
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        'target', nargs='?', choices=tuple(targets.keys()), default='test'
-    )
-    args = parser.parse_args(sysargs[1:])
-
-    targets[args.target]()
-    return 0
-
-
-def _test():
-    if check_output('go version'.split()).split()[2] < 'go1.2':
-        _run('go test -v .')
-        return
-
-    coverprofiles = []
-    for subpackage in ['', 'altsrc']:
-        coverprofile = 'cli.coverprofile'
-        if subpackage != '':
-            coverprofile = '{}.coverprofile'.format(subpackage)
-
-        coverprofiles.append(coverprofile)
-
-        _run('go test -v'.split() + [
-            '-coverprofile={}'.format(coverprofile),
-            ('{}/{}'.format(PACKAGE_NAME, subpackage)).rstrip('/')
-        ])
-
-    combined_name = _combine_coverprofiles(coverprofiles)
-    _run('go tool cover -func={}'.format(combined_name))
-    os.remove(combined_name)
-
-
-def _gfmrun():
-    go_version = check_output('go version'.split()).split()[2]
-    if go_version < 'go1.3':
-        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
-        return
-    _run(['gfmrun', '-c', str(_gfmrun_count()), '-s', 'README.md'])
-
-
-def _vet():
-    _run('go vet ./...')
-
-
-def _toc():
-    _run('node_modules/.bin/markdown-toc -i README.md')
-    _run('git diff --exit-code')
-
-
-def _gen():
-    go_version = check_output('go version'.split()).split()[2]
-    if go_version < 'go1.5':
-        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
-        return
-
-    _run('go generate ./...')
-    _run('git diff --exit-code')
-
-
-def _run(command):
-    if hasattr(command, 'split'):
-        command = command.split()
-    print('runtests: {}'.format(' '.join(command)), file=sys.stderr)
-    check_call(command)
-
-
-def _gfmrun_count():
-    with open('README.md') as infile:
-        lines = infile.read().splitlines()
-        return len(filter(_is_go_runnable, lines))
-
-
-def _is_go_runnable(line):
-    return line.startswith('package main')
-
-
-def _combine_coverprofiles(coverprofiles):
-    combined = tempfile.NamedTemporaryFile(
-        suffix='.coverprofile', delete=False
-    )
-    combined.write('mode: set\n')
-
-    for coverprofile in coverprofiles:
-        with open(coverprofile, 'r') as infile:
-            for line in infile.readlines():
-                if not line.startswith('mode: '):
-                    combined.write(line)
-
-    combined.flush()
-    name = combined.name
-    combined.close()
-    return name
-
-
-if __name__ == '__main__':
-    sys.exit(main())

vendor/github.com/urfave/cli/sort.go

@@ -0,0 +1,29 @@
+package cli
+
+import "unicode"
+
+// lexicographicLess compares strings alphabetically considering case.
+func lexicographicLess(i, j string) bool {
+	iRunes := []rune(i)
+	jRunes := []rune(j)
+
+	lenShared := len(iRunes)
+	if lenShared > len(jRunes) {
+		lenShared = len(jRunes)
+	}
+
+	for index := 0; index < lenShared; index++ {
+		ir := iRunes[index]
+		jr := jRunes[index]
+
+		if lir, ljr := unicode.ToLower(ir), unicode.ToLower(jr); lir != ljr {
+			return lir < ljr
+		}
+
+		if ir != jr {
+			return ir < jr
+		}
+	}
+
+	return i < j
+}

vendor/github.com/urfave/cli/template.go

@@ -0,0 +1,121 @@
+package cli
+
+// AppHelpTemplate is the text template for the Default help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var AppHelpTemplate = `NAME:
+   {{.Name}}{{if .Usage}} - {{.Usage}}{{end}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Version}}{{if not .HideVersion}}
+
+VERSION:
+   {{.Version}}{{end}}{{end}}{{if .Description}}
+
+DESCRIPTION:
+   {{.Description}}{{end}}{{if len .Authors}}
+
+AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
+   {{range $index, $author := .Authors}}{{if $index}}
+   {{end}}{{$author}}{{end}}{{end}}{{if .VisibleCommands}}
+
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+
+   {{.Name}}:{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{range .VisibleCommands}}
+   {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+
+GLOBAL OPTIONS:
+   {{range $index, $option := .VisibleFlags}}{{if $index}}
+   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
+
+COPYRIGHT:
+   {{.Copyright}}{{end}}
+`
+
+// CommandHelpTemplate is the text template for the command help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var CommandHelpTemplate = `NAME:
+   {{.HelpName}} - {{.Usage}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Category}}
+
+CATEGORY:
+   {{.Category}}{{end}}{{if .Description}}
+
+DESCRIPTION:
+   {{.Description}}{{end}}{{if .VisibleFlags}}
+
+OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}
+`
+
+// SubcommandHelpTemplate is the text template for the subcommand help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var SubcommandHelpTemplate = `NAME:
+   {{.HelpName}} - {{if .Description}}{{.Description}}{{else}}{{.Usage}}{{end}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
+
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+
+   {{.Name}}:{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{range .VisibleCommands}}
+   {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+
+OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}
+`
+
+var MarkdownDocTemplate = `% {{ .App.Name }}(8) {{ .App.Description }}
+
+% {{ .App.Author }}
+
+# NAME
+
+{{ .App.Name }}{{ if .App.Usage }} - {{ .App.Usage }}{{ end }}
+
+# SYNOPSIS
+
+{{ .App.Name }}
+{{ if .SynopsisArgs }}
+` + "```" + `
+{{ range $v := .SynopsisArgs }}{{ $v }}{{ end }}` + "```" + `
+{{ end }}{{ if .App.UsageText }}
+# DESCRIPTION
+
+{{ .App.UsageText }}
+{{ end }}
+**Usage**:
+
+` + "```" + `
+{{ .App.Name }} [GLOBAL OPTIONS] command [COMMAND OPTIONS] [ARGUMENTS...]
+` + "```" + `
+{{ if .GlobalArgs }}
+# GLOBAL OPTIONS
+{{ range $v := .GlobalArgs }}
+{{ $v }}{{ end }}
+{{ end }}{{ if .Commands }}
+# COMMANDS
+{{ range $v := .Commands }}
+{{ $v }}{{ end }}{{ end }}`
+
+var FishCompletionTemplate = `# {{ .App.Name }} fish shell completion
+
+function __fish_{{ .App.Name }}_no_subcommand --description 'Test if there has been any subcommand yet'
+    for i in (commandline -opc)
+        if contains -- $i{{ range $v := .AllCommands }} {{ $v }}{{ end }}
+            return 1
+        end
+    end
+    return 0
+end
+
+{{ range $v := .Completions }}{{ $v }}
+{{ end }}`

vendor/github.com/yuin/goldmark/parser/list.go

@@ -191,7 +191,7 @@ func (b *listParser) Continue(node ast.Node, reader text.Reader, pc Context) Sta
 					isHeading := false
 					last := pc.LastOpenedBlock().Node
 					if ast.IsParagraph(last) {
-						c, ok := matchesSetextHeadingBar(line)
+						c, ok := matchesSetextHeadingBar(line[match[3]-1:])
 						if ok && c == '-' {
 							isHeading = true
 						}

vendor/github.com/yuin/goldmark/util/util.go

@@ -268,7 +268,7 @@ func FindClosure(bs []byte, opener, closure byte, codeSpan, allowNesting bool) i
 			if codeSpanCloser == codeSpanOpener {
 				codeSpanOpener = 0
 			}
-		} else if c == '\\' && i < len(bs)-1 && IsPunct(bs[i+1]) {
+		} else if codeSpanOpener == 0 && c == '\\' && i < len(bs)-1 && IsPunct(bs[i+1]) {
 			i += 2
 			continue
 		} else if codeSpan && codeSpanOpener == 0 && c == '`' {

vendor/github.com/yuin/goldmark/util/util_safe.go

@@ -1,4 +1,4 @@
-// +build appengine,js
+// +build appengine js
 
 package util
 

vendor/golang.org/x/tools/go/analysis/analysis.go

@@ -7,6 +7,8 @@ import (
 	"go/token"
 	"go/types"
 	"reflect"
+
+	"golang.org/x/tools/internal/analysisinternal"
 )
 
 // An Analyzer describes an analysis function and its options.
@@ -69,6 +71,17 @@ type Analyzer struct {
 
 func (a *Analyzer) String() string { return a.Name }
 
+func init() {
+	// Set the analysisinternal functions to be able to pass type errors
+	// to the Pass type without modifying the go/analysis API.
+	analysisinternal.SetTypeErrors = func(p interface{}, errors []types.Error) {
+		p.(*Pass).typeErrors = errors
+	}
+	analysisinternal.GetTypeErrors = func(p interface{}) []types.Error {
+		return p.(*Pass).typeErrors
+	}
+}
+
 // A Pass provides information to the Run function that
 // applies a specific analyzer to a single Go package.
 //
@@ -138,6 +151,9 @@ type Pass struct {
 	// WARNING: This is an experimental API and may change in the future.
 	AllObjectFacts func() []ObjectFact
 
+	// typeErrors contains types.Errors that are associated with the pkg.
+	typeErrors []types.Error
+
 	/* Further fields may be added in future. */
 	// For example, suggested or applied refactorings.
 }

vendor/golang.org/x/tools/go/analysis/internal/analysisflags/flags.go

@@ -382,7 +382,7 @@ func (tree JSONTree) Add(fset *token.FileSet, id, name string, diags []analysis.
 func (tree JSONTree) Print() {
 	data, err := json.MarshalIndent(tree, "", "\t")
 	if err != nil {
-		log.Panicf("internal error: JSON marshalling failed: %v", err)
+		log.Panicf("internal error: JSON marshaling failed: %v", err)
 	}
 	fmt.Printf("%s\n", data)
 }

vendor/golang.org/x/tools/go/gcexportdata/gcexportdata.go

@@ -85,15 +85,11 @@ func Read(in io.Reader, fset *token.FileSet, imports map[string]*types.Package,
 		return gcimporter.ImportData(imports, path, path, bytes.NewReader(data))
 	}
 
-	// The indexed export format starts with an 'i'; the older
-	// binary export format starts with a 'c', 'd', or 'v'
-	// (from "version"). Select appropriate importer.
-	if len(data) > 0 && data[0] == 'i' {
-		_, pkg, err := gcimporter.IImportData(fset, imports, data[1:], path)
-		return pkg, err
+	// The indexed export format starts with an 'i'.
+	if len(data) == 0 || data[0] != 'i' {
+		return nil, fmt.Errorf("unknown export data format")
 	}
-
-	_, pkg, err := gcimporter.BImportData(fset, imports, data, path)
+	_, pkg, err := gcimporter.IImportData(fset, imports, data[1:], path)
 	return pkg, err
 }
 

vendor/golang.org/x/tools/go/internal/gcimporter/bexport.go

@@ -1,852 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Binary package export.
-// This file was derived from $GOROOT/src/cmd/compile/internal/gc/bexport.go;
-// see that file for specification of the format.
-
-package gcimporter
-
-import (
-	"bytes"
-	"encoding/binary"
-	"fmt"
-	"go/ast"
-	"go/constant"
-	"go/token"
-	"go/types"
-	"math"
-	"math/big"
-	"sort"
-	"strings"
-)
-
-// If debugFormat is set, each integer and string value is preceded by a marker
-// and position information in the encoding. This mechanism permits an importer
-// to recognize immediately when it is out of sync. The importer recognizes this
-// mode automatically (i.e., it can import export data produced with debugging
-// support even if debugFormat is not set at the time of import). This mode will
-// lead to massively larger export data (by a factor of 2 to 3) and should only
-// be enabled during development and debugging.
-//
-// NOTE: This flag is the first flag to enable if importing dies because of
-// (suspected) format errors, and whenever a change is made to the format.
-const debugFormat = false // default: false
-
-// If trace is set, debugging output is printed to std out.
-const trace = false // default: false
-
-// Current export format version. Increase with each format change.
-// Note: The latest binary (non-indexed) export format is at version 6.
-//       This exporter is still at level 4, but it doesn't matter since
-//       the binary importer can handle older versions just fine.
-// 6: package height (CL 105038) -- NOT IMPLEMENTED HERE
-// 5: improved position encoding efficiency (issue 20080, CL 41619) -- NOT IMPLEMEMTED HERE
-// 4: type name objects support type aliases, uses aliasTag
-// 3: Go1.8 encoding (same as version 2, aliasTag defined but never used)
-// 2: removed unused bool in ODCL export (compiler only)
-// 1: header format change (more regular), export package for _ struct fields
-// 0: Go1.7 encoding
-const exportVersion = 4
-
-// trackAllTypes enables cycle tracking for all types, not just named
-// types. The existing compiler invariants assume that unnamed types
-// that are not completely set up are not used, or else there are spurious
-// errors.
-// If disabled, only named types are tracked, possibly leading to slightly
-// less efficient encoding in rare cases. It also prevents the export of
-// some corner-case type declarations (but those are not handled correctly
-// with with the textual export format either).
-// TODO(gri) enable and remove once issues caused by it are fixed
-const trackAllTypes = false
-
-type exporter struct {
-	fset *token.FileSet
-	out  bytes.Buffer
-
-	// object -> index maps, indexed in order of serialization
-	strIndex map[string]int
-	pkgIndex map[*types.Package]int
-	typIndex map[types.Type]int
-
-	// position encoding
-	posInfoFormat bool
-	prevFile      string
-	prevLine      int
-
-	// debugging support
-	written int // bytes written
-	indent  int // for trace
-}
-
-// internalError represents an error generated inside this package.
-type internalError string
-
-func (e internalError) Error() string { return "gcimporter: " + string(e) }
-
-func internalErrorf(format string, args ...interface{}) error {
-	return internalError(fmt.Sprintf(format, args...))
-}
-
-// BExportData returns binary export data for pkg.
-// If no file set is provided, position info will be missing.
-func BExportData(fset *token.FileSet, pkg *types.Package) (b []byte, err error) {
-	defer func() {
-		if e := recover(); e != nil {
-			if ierr, ok := e.(internalError); ok {
-				err = ierr
-				return
-			}
-			// Not an internal error; panic again.
-			panic(e)
-		}
-	}()
-
-	p := exporter{
-		fset:          fset,
-		strIndex:      map[string]int{"": 0}, // empty string is mapped to 0
-		pkgIndex:      make(map[*types.Package]int),
-		typIndex:      make(map[types.Type]int),
-		posInfoFormat: true, // TODO(gri) might become a flag, eventually
-	}
-
-	// write version info
-	// The version string must start with "version %d" where %d is the version
-	// number. Additional debugging information may follow after a blank; that
-	// text is ignored by the importer.
-	p.rawStringln(fmt.Sprintf("version %d", exportVersion))
-	var debug string
-	if debugFormat {
-		debug = "debug"
-	}
-	p.rawStringln(debug) // cannot use p.bool since it's affected by debugFormat; also want to see this clearly
-	p.bool(trackAllTypes)
-	p.bool(p.posInfoFormat)
-
-	// --- generic export data ---
-
-	// populate type map with predeclared "known" types
-	for index, typ := range predeclared() {
-		p.typIndex[typ] = index
-	}
-	if len(p.typIndex) != len(predeclared()) {
-		return nil, internalError("duplicate entries in type map?")
-	}
-
-	// write package data
-	p.pkg(pkg, true)
-	if trace {
-		p.tracef("\n")
-	}
-
-	// write objects
-	objcount := 0
-	scope := pkg.Scope()
-	for _, name := range scope.Names() {
-		if !ast.IsExported(name) {
-			continue
-		}
-		if trace {
-			p.tracef("\n")
-		}
-		p.obj(scope.Lookup(name))
-		objcount++
-	}
-
-	// indicate end of list
-	if trace {
-		p.tracef("\n")
-	}
-	p.tag(endTag)
-
-	// for self-verification only (redundant)
-	p.int(objcount)
-
-	if trace {
-		p.tracef("\n")
-	}
-
-	// --- end of export data ---
-
-	return p.out.Bytes(), nil
-}
-
-func (p *exporter) pkg(pkg *types.Package, emptypath bool) {
-	if pkg == nil {
-		panic(internalError("unexpected nil pkg"))
-	}
-
-	// if we saw the package before, write its index (>= 0)
-	if i, ok := p.pkgIndex[pkg]; ok {
-		p.index('P', i)
-		return
-	}
-
-	// otherwise, remember the package, write the package tag (< 0) and package data
-	if trace {
-		p.tracef("P%d = { ", len(p.pkgIndex))
-		defer p.tracef("} ")
-	}
-	p.pkgIndex[pkg] = len(p.pkgIndex)
-
-	p.tag(packageTag)
-	p.string(pkg.Name())
-	if emptypath {
-		p.string("")
-	} else {
-		p.string(pkg.Path())
-	}
-}
-
-func (p *exporter) obj(obj types.Object) {
-	switch obj := obj.(type) {
-	case *types.Const:
-		p.tag(constTag)
-		p.pos(obj)
-		p.qualifiedName(obj)
-		p.typ(obj.Type())
-		p.value(obj.Val())
-
-	case *types.TypeName:
-		if obj.IsAlias() {
-			p.tag(aliasTag)
-			p.pos(obj)
-			p.qualifiedName(obj)
-		} else {
-			p.tag(typeTag)
-		}
-		p.typ(obj.Type())
-
-	case *types.Var:
-		p.tag(varTag)
-		p.pos(obj)
-		p.qualifiedName(obj)
-		p.typ(obj.Type())
-
-	case *types.Func:
-		p.tag(funcTag)
-		p.pos(obj)
-		p.qualifiedName(obj)
-		sig := obj.Type().(*types.Signature)
-		p.paramList(sig.Params(), sig.Variadic())
-		p.paramList(sig.Results(), false)
-
-	default:
-		panic(internalErrorf("unexpected object %v (%T)", obj, obj))
-	}
-}
-
-func (p *exporter) pos(obj types.Object) {
-	if !p.posInfoFormat {
-		return
-	}
-
-	file, line := p.fileLine(obj)
-	if file == p.prevFile {
-		// common case: write line delta
-		// delta == 0 means different file or no line change
-		delta := line - p.prevLine
-		p.int(delta)
-		if delta == 0 {
-			p.int(-1) // -1 means no file change
-		}
-	} else {
-		// different file
-		p.int(0)
-		// Encode filename as length of common prefix with previous
-		// filename, followed by (possibly empty) suffix. Filenames
-		// frequently share path prefixes, so this can save a lot
-		// of space and make export data size less dependent on file
-		// path length. The suffix is unlikely to be empty because
-		// file names tend to end in ".go".
-		n := commonPrefixLen(p.prevFile, file)
-		p.int(n)           // n >= 0
-		p.string(file[n:]) // write suffix only
-		p.prevFile = file
-		p.int(line)
-	}
-	p.prevLine = line
-}
-
-func (p *exporter) fileLine(obj types.Object) (file string, line int) {
-	if p.fset != nil {
-		pos := p.fset.Position(obj.Pos())
-		file = pos.Filename
-		line = pos.Line
-	}
-	return
-}
-
-func commonPrefixLen(a, b string) int {
-	if len(a) > len(b) {
-		a, b = b, a
-	}
-	// len(a) <= len(b)
-	i := 0
-	for i < len(a) && a[i] == b[i] {
-		i++
-	}
-	return i
-}
-
-func (p *exporter) qualifiedName(obj types.Object) {
-	p.string(obj.Name())
-	p.pkg(obj.Pkg(), false)
-}
-
-func (p *exporter) typ(t types.Type) {
-	if t == nil {
-		panic(internalError("nil type"))
-	}
-
-	// Possible optimization: Anonymous pointer types *T where
-	// T is a named type are common. We could canonicalize all
-	// such types *T to a single type PT = *T. This would lead
-	// to at most one *T entry in typIndex, and all future *T's
-	// would be encoded as the respective index directly. Would
-	// save 1 byte (pointerTag) per *T and reduce the typIndex
-	// size (at the cost of a canonicalization map). We can do
-	// this later, without encoding format change.
-
-	// if we saw the type before, write its index (>= 0)
-	if i, ok := p.typIndex[t]; ok {
-		p.index('T', i)
-		return
-	}
-
-	// otherwise, remember the type, write the type tag (< 0) and type data
-	if trackAllTypes {
-		if trace {
-			p.tracef("T%d = {>\n", len(p.typIndex))
-			defer p.tracef("<\n} ")
-		}
-		p.typIndex[t] = len(p.typIndex)
-	}
-
-	switch t := t.(type) {
-	case *types.Named:
-		if !trackAllTypes {
-			// if we don't track all types, track named types now
-			p.typIndex[t] = len(p.typIndex)
-		}
-
-		p.tag(namedTag)
-		p.pos(t.Obj())
-		p.qualifiedName(t.Obj())
-		p.typ(t.Underlying())
-		if !types.IsInterface(t) {
-			p.assocMethods(t)
-		}
-
-	case *types.Array:
-		p.tag(arrayTag)
-		p.int64(t.Len())
-		p.typ(t.Elem())
-
-	case *types.Slice:
-		p.tag(sliceTag)
-		p.typ(t.Elem())
-
-	case *dddSlice:
-		p.tag(dddTag)
-		p.typ(t.elem)
-
-	case *types.Struct:
-		p.tag(structTag)
-		p.fieldList(t)
-
-	case *types.Pointer:
-		p.tag(pointerTag)
-		p.typ(t.Elem())
-
-	case *types.Signature:
-		p.tag(signatureTag)
-		p.paramList(t.Params(), t.Variadic())
-		p.paramList(t.Results(), false)
-
-	case *types.Interface:
-		p.tag(interfaceTag)
-		p.iface(t)
-
-	case *types.Map:
-		p.tag(mapTag)
-		p.typ(t.Key())
-		p.typ(t.Elem())
-
-	case *types.Chan:
-		p.tag(chanTag)
-		p.int(int(3 - t.Dir())) // hack
-		p.typ(t.Elem())
-
-	default:
-		panic(internalErrorf("unexpected type %T: %s", t, t))
-	}
-}
-
-func (p *exporter) assocMethods(named *types.Named) {
-	// Sort methods (for determinism).
-	var methods []*types.Func
-	for i := 0; i < named.NumMethods(); i++ {
-		methods = append(methods, named.Method(i))
-	}
-	sort.Sort(methodsByName(methods))
-
-	p.int(len(methods))
-
-	if trace && methods != nil {
-		p.tracef("associated methods {>\n")
-	}
-
-	for i, m := range methods {
-		if trace && i > 0 {
-			p.tracef("\n")
-		}
-
-		p.pos(m)
-		name := m.Name()
-		p.string(name)
-		if !exported(name) {
-			p.pkg(m.Pkg(), false)
-		}
-
-		sig := m.Type().(*types.Signature)
-		p.paramList(types.NewTuple(sig.Recv()), false)
-		p.paramList(sig.Params(), sig.Variadic())
-		p.paramList(sig.Results(), false)
-		p.int(0) // dummy value for go:nointerface pragma - ignored by importer
-	}
-
-	if trace && methods != nil {
-		p.tracef("<\n} ")
-	}
-}
-
-type methodsByName []*types.Func
-
-func (x methodsByName) Len() int           { return len(x) }
-func (x methodsByName) Swap(i, j int)      { x[i], x[j] = x[j], x[i] }
-func (x methodsByName) Less(i, j int) bool { return x[i].Name() < x[j].Name() }
-
-func (p *exporter) fieldList(t *types.Struct) {
-	if trace && t.NumFields() > 0 {
-		p.tracef("fields {>\n")
-		defer p.tracef("<\n} ")
-	}
-
-	p.int(t.NumFields())
-	for i := 0; i < t.NumFields(); i++ {
-		if trace && i > 0 {
-			p.tracef("\n")
-		}
-		p.field(t.Field(i))
-		p.string(t.Tag(i))
-	}
-}
-
-func (p *exporter) field(f *types.Var) {
-	if !f.IsField() {
-		panic(internalError("field expected"))
-	}
-
-	p.pos(f)
-	p.fieldName(f)
-	p.typ(f.Type())
-}
-
-func (p *exporter) iface(t *types.Interface) {
-	// TODO(gri): enable importer to load embedded interfaces,
-	// then emit Embeddeds and ExplicitMethods separately here.
-	p.int(0)
-
-	n := t.NumMethods()
-	if trace && n > 0 {
-		p.tracef("methods {>\n")
-		defer p.tracef("<\n} ")
-	}
-	p.int(n)
-	for i := 0; i < n; i++ {
-		if trace && i > 0 {
-			p.tracef("\n")
-		}
-		p.method(t.Method(i))
-	}
-}
-
-func (p *exporter) method(m *types.Func) {
-	sig := m.Type().(*types.Signature)
-	if sig.Recv() == nil {
-		panic(internalError("method expected"))
-	}
-
-	p.pos(m)
-	p.string(m.Name())
-	if m.Name() != "_" && !ast.IsExported(m.Name()) {
-		p.pkg(m.Pkg(), false)
-	}
-
-	// interface method; no need to encode receiver.
-	p.paramList(sig.Params(), sig.Variadic())
-	p.paramList(sig.Results(), false)
-}
-
-func (p *exporter) fieldName(f *types.Var) {
-	name := f.Name()
-
-	if f.Anonymous() {
-		// anonymous field - we distinguish between 3 cases:
-		// 1) field name matches base type name and is exported
-		// 2) field name matches base type name and is not exported
-		// 3) field name doesn't match base type name (alias name)
-		bname := basetypeName(f.Type())
-		if name == bname {
-			if ast.IsExported(name) {
-				name = "" // 1) we don't need to know the field name or package
-			} else {
-				name = "?" // 2) use unexported name "?" to force package export
-			}
-		} else {
-			// 3) indicate alias and export name as is
-			// (this requires an extra "@" but this is a rare case)
-			p.string("@")
-		}
-	}
-
-	p.string(name)
-	if name != "" && !ast.IsExported(name) {
-		p.pkg(f.Pkg(), false)
-	}
-}
-
-func basetypeName(typ types.Type) string {
-	switch typ := deref(typ).(type) {
-	case *types.Basic:
-		return typ.Name()
-	case *types.Named:
-		return typ.Obj().Name()
-	default:
-		return "" // unnamed type
-	}
-}
-
-func (p *exporter) paramList(params *types.Tuple, variadic bool) {
-	// use negative length to indicate unnamed parameters
-	// (look at the first parameter only since either all
-	// names are present or all are absent)
-	n := params.Len()
-	if n > 0 && params.At(0).Name() == "" {
-		n = -n
-	}
-	p.int(n)
-	for i := 0; i < params.Len(); i++ {
-		q := params.At(i)
-		t := q.Type()
-		if variadic && i == params.Len()-1 {
-			t = &dddSlice{t.(*types.Slice).Elem()}
-		}
-		p.typ(t)
-		if n > 0 {
-			name := q.Name()
-			p.string(name)
-			if name != "_" {
-				p.pkg(q.Pkg(), false)
-			}
-		}
-		p.string("") // no compiler-specific info
-	}
-}
-
-func (p *exporter) value(x constant.Value) {
-	if trace {
-		p.tracef("= ")
-	}
-
-	switch x.Kind() {
-	case constant.Bool:
-		tag := falseTag
-		if constant.BoolVal(x) {
-			tag = trueTag
-		}
-		p.tag(tag)
-
-	case constant.Int:
-		if v, exact := constant.Int64Val(x); exact {
-			// common case: x fits into an int64 - use compact encoding
-			p.tag(int64Tag)
-			p.int64(v)
-			return
-		}
-		// uncommon case: large x - use float encoding
-		// (powers of 2 will be encoded efficiently with exponent)
-		p.tag(floatTag)
-		p.float(constant.ToFloat(x))
-
-	case constant.Float:
-		p.tag(floatTag)
-		p.float(x)
-
-	case constant.Complex:
-		p.tag(complexTag)
-		p.float(constant.Real(x))
-		p.float(constant.Imag(x))
-
-	case constant.String:
-		p.tag(stringTag)
-		p.string(constant.StringVal(x))
-
-	case constant.Unknown:
-		// package contains type errors
-		p.tag(unknownTag)
-
-	default:
-		panic(internalErrorf("unexpected value %v (%T)", x, x))
-	}
-}
-
-func (p *exporter) float(x constant.Value) {
-	if x.Kind() != constant.Float {
-		panic(internalErrorf("unexpected constant %v, want float", x))
-	}
-	// extract sign (there is no -0)
-	sign := constant.Sign(x)
-	if sign == 0 {
-		// x == 0
-		p.int(0)
-		return
-	}
-	// x != 0
-
-	var f big.Float
-	if v, exact := constant.Float64Val(x); exact {
-		// float64
-		f.SetFloat64(v)
-	} else if num, denom := constant.Num(x), constant.Denom(x); num.Kind() == constant.Int {
-		// TODO(gri): add big.Rat accessor to constant.Value.
-		r := valueToRat(num)
-		f.SetRat(r.Quo(r, valueToRat(denom)))
-	} else {
-		// Value too large to represent as a fraction => inaccessible.
-		// TODO(gri): add big.Float accessor to constant.Value.
-		f.SetFloat64(math.MaxFloat64) // FIXME
-	}
-
-	// extract exponent such that 0.5 <= m < 1.0
-	var m big.Float
-	exp := f.MantExp(&m)
-
-	// extract mantissa as *big.Int
-	// - set exponent large enough so mant satisfies mant.IsInt()
-	// - get *big.Int from mant
-	m.SetMantExp(&m, int(m.MinPrec()))
-	mant, acc := m.Int(nil)
-	if acc != big.Exact {
-		panic(internalError("internal error"))
-	}
-
-	p.int(sign)
-	p.int(exp)
-	p.string(string(mant.Bytes()))
-}
-
-func valueToRat(x constant.Value) *big.Rat {
-	// Convert little-endian to big-endian.
-	// I can't believe this is necessary.
-	bytes := constant.Bytes(x)
-	for i := 0; i < len(bytes)/2; i++ {
-		bytes[i], bytes[len(bytes)-1-i] = bytes[len(bytes)-1-i], bytes[i]
-	}
-	return new(big.Rat).SetInt(new(big.Int).SetBytes(bytes))
-}
-
-func (p *exporter) bool(b bool) bool {
-	if trace {
-		p.tracef("[")
-		defer p.tracef("= %v] ", b)
-	}
-
-	x := 0
-	if b {
-		x = 1
-	}
-	p.int(x)
-	return b
-}
-
-// ----------------------------------------------------------------------------
-// Low-level encoders
-
-func (p *exporter) index(marker byte, index int) {
-	if index < 0 {
-		panic(internalError("invalid index < 0"))
-	}
-	if debugFormat {
-		p.marker('t')
-	}
-	if trace {
-		p.tracef("%c%d ", marker, index)
-	}
-	p.rawInt64(int64(index))
-}
-
-func (p *exporter) tag(tag int) {
-	if tag >= 0 {
-		panic(internalError("invalid tag >= 0"))
-	}
-	if debugFormat {
-		p.marker('t')
-	}
-	if trace {
-		p.tracef("%s ", tagString[-tag])
-	}
-	p.rawInt64(int64(tag))
-}
-
-func (p *exporter) int(x int) {
-	p.int64(int64(x))
-}
-
-func (p *exporter) int64(x int64) {
-	if debugFormat {
-		p.marker('i')
-	}
-	if trace {
-		p.tracef("%d ", x)
-	}
-	p.rawInt64(x)
-}
-
-func (p *exporter) string(s string) {
-	if debugFormat {
-		p.marker('s')
-	}
-	if trace {
-		p.tracef("%q ", s)
-	}
-	// if we saw the string before, write its index (>= 0)
-	// (the empty string is mapped to 0)
-	if i, ok := p.strIndex[s]; ok {
-		p.rawInt64(int64(i))
-		return
-	}
-	// otherwise, remember string and write its negative length and bytes
-	p.strIndex[s] = len(p.strIndex)
-	p.rawInt64(-int64(len(s)))
-	for i := 0; i < len(s); i++ {
-		p.rawByte(s[i])
-	}
-}
-
-// marker emits a marker byte and position information which makes
-// it easy for a reader to detect if it is "out of sync". Used for
-// debugFormat format only.
-func (p *exporter) marker(m byte) {
-	p.rawByte(m)
-	// Enable this for help tracking down the location
-	// of an incorrect marker when running in debugFormat.
-	if false && trace {
-		p.tracef("#%d ", p.written)
-	}
-	p.rawInt64(int64(p.written))
-}
-
-// rawInt64 should only be used by low-level encoders.
-func (p *exporter) rawInt64(x int64) {
-	var tmp [binary.MaxVarintLen64]byte
-	n := binary.PutVarint(tmp[:], x)
-	for i := 0; i < n; i++ {
-		p.rawByte(tmp[i])
-	}
-}
-
-// rawStringln should only be used to emit the initial version string.
-func (p *exporter) rawStringln(s string) {
-	for i := 0; i < len(s); i++ {
-		p.rawByte(s[i])
-	}
-	p.rawByte('\n')
-}
-
-// rawByte is the bottleneck interface to write to p.out.
-// rawByte escapes b as follows (any encoding does that
-// hides '$'):
-//
-//	'$'  => '|' 'S'
-//	'|'  => '|' '|'
-//
-// Necessary so other tools can find the end of the
-// export data by searching for "$$".
-// rawByte should only be used by low-level encoders.
-func (p *exporter) rawByte(b byte) {
-	switch b {
-	case '$':
-		// write '$' as '|' 'S'
-		b = 'S'
-		fallthrough
-	case '|':
-		// write '|' as '|' '|'
-		p.out.WriteByte('|')
-		p.written++
-	}
-	p.out.WriteByte(b)
-	p.written++
-}
-
-// tracef is like fmt.Printf but it rewrites the format string
-// to take care of indentation.
-func (p *exporter) tracef(format string, args ...interface{}) {
-	if strings.ContainsAny(format, "<>\n") {
-		var buf bytes.Buffer
-		for i := 0; i < len(format); i++ {
-			// no need to deal with runes
-			ch := format[i]
-			switch ch {
-			case '>':
-				p.indent++
-				continue
-			case '<':
-				p.indent--
-				continue
-			}
-			buf.WriteByte(ch)
-			if ch == '\n' {
-				for j := p.indent; j > 0; j-- {
-					buf.WriteString(".  ")
-				}
-			}
-		}
-		format = buf.String()
-	}
-	fmt.Printf(format, args...)
-}
-
-// Debugging support.
-// (tagString is only used when tracing is enabled)
-var tagString = [...]string{
-	// Packages
-	-packageTag: "package",
-
-	// Types
-	-namedTag:     "named type",
-	-arrayTag:     "array",
-	-sliceTag:     "slice",
-	-dddTag:       "ddd",
-	-structTag:    "struct",
-	-pointerTag:   "pointer",
-	-signatureTag: "signature",
-	-interfaceTag: "interface",
-	-mapTag:       "map",
-	-chanTag:      "chan",
-
-	// Values
-	-falseTag:    "false",
-	-trueTag:     "true",
-	-int64Tag:    "int64",
-	-floatTag:    "float",
-	-fractionTag: "fraction",
-	-complexTag:  "complex",
-	-stringTag:   "string",
-	-unknownTag:  "unknown",
-
-	// Type aliases
-	-aliasTag: "alias",
-}

vendor/golang.org/x/tools/go/internal/gcimporter/gcimporter.go

@@ -204,14 +204,11 @@ func Import(packages map[string]*types.Package, path, srcDir string, lookup func
 		// Or, define a new standard go/types/gcexportdata package.
 		fset := token.NewFileSet()
 
-		// The indexed export format starts with an 'i'; the older
-		// binary export format starts with a 'c', 'd', or 'v'
-		// (from "version"). Select appropriate importer.
-		if len(data) > 0 && data[0] == 'i' {
-			_, pkg, err = IImportData(fset, packages, data[1:], id)
-		} else {
-			_, pkg, err = BImportData(fset, packages, data, id)
+		// The indexed export format starts with an 'i'.
+		if len(data) == 0 || data[0] != 'i' {
+			return nil, fmt.Errorf("unknown export data format")
 		}
+		_, pkg, err = IImportData(fset, packages, data[1:], id)
 
 	default:
 		err = fmt.Errorf("unknown export data header: %q", hdr)

vendor/golang.org/x/tools/go/internal/gcimporter/iexport.go

@@ -11,6 +11,7 @@ package gcimporter
 import (
 	"bytes"
 	"encoding/binary"
+	"fmt"
 	"go/ast"
 	"go/constant"
 	"go/token"
@@ -25,6 +26,15 @@ import (
 // 0: Go1.11 encoding
 const iexportVersion = 0
 
+// internalError represents an error generated inside this package.
+type internalError string
+
+func (e internalError) Error() string { return "gcimporter: " + string(e) }
+
+func internalErrorf(format string, args ...interface{}) error {
+	return internalError(fmt.Sprintf(format, args...))
+}
+
 // IExportData returns the binary export data for pkg.
 //
 // If no file set is provided, position info will be missing.
@@ -528,6 +538,16 @@ func constantToFloat(x constant.Value) *big.Float {
 	return &f
 }
 
+func valueToRat(x constant.Value) *big.Rat {
+	// Convert little-endian to big-endian.
+	// I can't believe this is necessary.
+	bytes := constant.Bytes(x)
+	for i := 0; i < len(bytes)/2; i++ {
+		bytes[i], bytes[len(bytes)-1-i] = bytes[len(bytes)-1-i], bytes[i]
+	}
+	return new(big.Rat).SetInt(new(big.Int).SetBytes(bytes))
+}
+
 // mpint exports a multi-precision integer.
 //
 // For unsigned types, small values are written out as a single

vendor/golang.org/x/tools/go/internal/gcimporter/iimport.go

@@ -18,6 +18,9 @@ import (
 	"go/types"
 	"io"
 	"sort"
+	"sync"
+	"unicode"
+	"unicode/utf8"
 )
 
 type intReader struct {
@@ -25,6 +28,10 @@ type intReader struct {
 	path string
 }
 
+func errorf(format string, args ...interface{}) {
+	panic(fmt.Sprintf(format, args...))
+}
+
 func (r *intReader) int64() int64 {
 	i, err := binary.ReadVarint(r.Reader)
 	if err != nil {
@@ -628,3 +635,166 @@ func (r *importReader) byte() byte {
 	}
 	return x
 }
+
+const deltaNewFile = -64 // see cmd/compile/internal/gc/bexport.go
+
+// Synthesize a token.Pos
+type fakeFileSet struct {
+	fset  *token.FileSet
+	files map[string]*token.File
+}
+
+func (s *fakeFileSet) pos(file string, line, column int) token.Pos {
+	// TODO(mdempsky): Make use of column.
+
+	// Since we don't know the set of needed file positions, we
+	// reserve maxlines positions per file.
+	const maxlines = 64 * 1024
+	f := s.files[file]
+	if f == nil {
+		f = s.fset.AddFile(file, -1, maxlines)
+		s.files[file] = f
+		// Allocate the fake linebreak indices on first use.
+		// TODO(adonovan): opt: save ~512KB using a more complex scheme?
+		fakeLinesOnce.Do(func() {
+			fakeLines = make([]int, maxlines)
+			for i := range fakeLines {
+				fakeLines[i] = i
+			}
+		})
+		f.SetLines(fakeLines)
+	}
+
+	if line > maxlines {
+		line = 1
+	}
+
+	// Treat the file as if it contained only newlines
+	// and column=1: use the line number as the offset.
+	return f.Pos(line - 1)
+}
+
+var (
+	fakeLines     []int
+	fakeLinesOnce sync.Once
+)
+
+func chanDir(d int) types.ChanDir {
+	// tag values must match the constants in cmd/compile/internal/gc/go.go
+	switch d {
+	case 1 /* Crecv */ :
+		return types.RecvOnly
+	case 2 /* Csend */ :
+		return types.SendOnly
+	case 3 /* Cboth */ :
+		return types.SendRecv
+	default:
+		errorf("unexpected channel dir %d", d)
+		return 0
+	}
+}
+
+func exported(name string) bool {
+	ch, _ := utf8.DecodeRuneInString(name)
+	return unicode.IsUpper(ch)
+}
+
+// ----------------------------------------------------------------------------
+// Export format
+
+// Tags. Must be < 0.
+const (
+	// Objects
+	packageTag = -(iota + 1)
+	constTag
+	typeTag
+	varTag
+	funcTag
+	endTag
+
+	// Types
+	namedTag
+	arrayTag
+	sliceTag
+	dddTag
+	structTag
+	pointerTag
+	signatureTag
+	interfaceTag
+	mapTag
+	chanTag
+
+	// Values
+	falseTag
+	trueTag
+	int64Tag
+	floatTag
+	fractionTag // not used by gc
+	complexTag
+	stringTag
+	nilTag     // only used by gc (appears in exported inlined function bodies)
+	unknownTag // not used by gc (only appears in packages with errors)
+
+	// Type aliases
+	aliasTag
+)
+
+var predeclOnce sync.Once
+var predecl []types.Type // initialized lazily
+
+func predeclared() []types.Type {
+	predeclOnce.Do(func() {
+		// initialize lazily to be sure that all
+		// elements have been initialized before
+		predecl = []types.Type{ // basic types
+			types.Typ[types.Bool],
+			types.Typ[types.Int],
+			types.Typ[types.Int8],
+			types.Typ[types.Int16],
+			types.Typ[types.Int32],
+			types.Typ[types.Int64],
+			types.Typ[types.Uint],
+			types.Typ[types.Uint8],
+			types.Typ[types.Uint16],
+			types.Typ[types.Uint32],
+			types.Typ[types.Uint64],
+			types.Typ[types.Uintptr],
+			types.Typ[types.Float32],
+			types.Typ[types.Float64],
+			types.Typ[types.Complex64],
+			types.Typ[types.Complex128],
+			types.Typ[types.String],
+
+			// basic type aliases
+			types.Universe.Lookup("byte").Type(),
+			types.Universe.Lookup("rune").Type(),
+
+			// error
+			types.Universe.Lookup("error").Type(),
+
+			// untyped types
+			types.Typ[types.UntypedBool],
+			types.Typ[types.UntypedInt],
+			types.Typ[types.UntypedRune],
+			types.Typ[types.UntypedFloat],
+			types.Typ[types.UntypedComplex],
+			types.Typ[types.UntypedString],
+			types.Typ[types.UntypedNil],
+
+			// package unsafe
+			types.Typ[types.UnsafePointer],
+
+			// invalid type
+			types.Typ[types.Invalid], // only appears in packages with errors
+
+			// used internally by gc; never used by this package or in .a files
+			anyType{},
+		}
+	})
+	return predecl
+}
+
+type anyType struct{}
+
+func (t anyType) Underlying() types.Type { return t }
+func (t anyType) String() string         { return "any" }

vendor/golang.org/x/tools/go/internal/packagesdriver/sizes.go

@@ -19,8 +19,7 @@ import (
 
 var debug = false
 
-// GetSizes returns the sizes used by the underlying driver with the given parameters.
-func GetSizes(ctx context.Context, buildFlags, env []string, dir string, usesExportData bool) (types.Sizes, error) {
+func GetSizes(ctx context.Context, buildFlags, env []string, gocmdRunner *gocommand.Runner, dir string) (types.Sizes, error) {
 	// TODO(matloob): Clean this up. This code is mostly a copy of packages.findExternalDriver.
 	const toolPrefix = "GOPACKAGESDRIVER="
 	tool := ""
@@ -40,7 +39,7 @@ func GetSizes(ctx context.Context, buildFlags, env []string, dir string, usesExp
 	}
 
 	if tool == "off" {
-		return GetSizesGolist(ctx, buildFlags, env, dir, usesExportData)
+		return GetSizesGolist(ctx, buildFlags, env, gocmdRunner, dir)
 	}
 
 	req, err := json.Marshal(struct {
@@ -76,7 +75,7 @@ func GetSizes(ctx context.Context, buildFlags, env []string, dir string, usesExp
 	return response.Sizes, nil
 }
 
-func GetSizesGolist(ctx context.Context, buildFlags, env []string, dir string, usesExportData bool) (types.Sizes, error) {
+func GetSizesGolist(ctx context.Context, buildFlags, env []string, gocmdRunner *gocommand.Runner, dir string) (types.Sizes, error) {
 	inv := gocommand.Invocation{
 		Verb:       "list",
 		Args:       []string{"-f", "{{context.GOARCH}} {{context.Compiler}}", "--", "unsafe"},
@@ -84,7 +83,7 @@ func GetSizesGolist(ctx context.Context, buildFlags, env []string, dir string, u
 		BuildFlags: buildFlags,
 		WorkingDir: dir,
 	}
-	stdout, stderr, friendlyErr, rawErr := inv.RunRaw(ctx)
+	stdout, stderr, friendlyErr, rawErr := gocmdRunner.RunRaw(ctx, inv)
 	var goarch, compiler string
 	if rawErr != nil {
 		if strings.Contains(rawErr.Error(), "cannot find main module") {
@@ -96,7 +95,7 @@ func GetSizesGolist(ctx context.Context, buildFlags, env []string, dir string, u
 				Env:        env,
 				WorkingDir: dir,
 			}
-			envout, enverr := inv.Run(ctx)
+			envout, enverr := gocmdRunner.Run(ctx, inv)
 			if enverr != nil {
 				return nil, enverr
 			}

vendor/golang.org/x/tools/go/packages/golist.go

@@ -25,6 +25,7 @@ import (
 	"golang.org/x/tools/go/internal/packagesdriver"
 	"golang.org/x/tools/internal/gocommand"
 	"golang.org/x/tools/internal/packagesinternal"
+	"golang.org/x/xerrors"
 )
 
 // debug controls verbose logging.
@@ -142,7 +143,7 @@ func goListDriver(cfg *Config, patterns ...string) (*driverResponse, error) {
 		sizeswg.Add(1)
 		go func() {
 			var sizes types.Sizes
-			sizes, sizeserr = packagesdriver.GetSizesGolist(ctx, cfg.BuildFlags, cfg.Env, cfg.Dir, usesExportData(cfg))
+			sizes, sizeserr = packagesdriver.GetSizesGolist(ctx, cfg.BuildFlags, cfg.Env, cfg.gocmdRunner, cfg.Dir)
 			// types.SizesFor always returns nil or a *types.StdSizes.
 			response.dr.Sizes, _ = sizes.(*types.StdSizes)
 			sizeswg.Done()
@@ -502,10 +503,19 @@ func (state *golistState) createDriverResponse(words ...string) (*driverResponse
 					errkind = "use of internal package not allowed"
 				}
 				if errkind != "" {
-					if len(old.Error.ImportStack) < 2 {
-						return nil, fmt.Errorf(`internal error: go list gave a %q error with an import stack with fewer than two elements`, errkind)
+					if len(old.Error.ImportStack) < 1 {
+						return nil, fmt.Errorf(`internal error: go list gave a %q error with empty import stack`, errkind)
+					}
+					importingPkg := old.Error.ImportStack[len(old.Error.ImportStack)-1]
+					if importingPkg == old.ImportPath {
+						// Using an older version of Go which put this package itself on top of import
+						// stack, instead of the importer. Look for importer in second from top
+						// position.
+						if len(old.Error.ImportStack) < 2 {
+							return nil, fmt.Errorf(`internal error: go list gave a %q error with an import stack without importing package`, errkind)
+						}
+						importingPkg = old.Error.ImportStack[len(old.Error.ImportStack)-2]
 					}
-					importingPkg := old.Error.ImportStack[len(old.Error.ImportStack)-2]
 					additionalErrors[importingPkg] = append(additionalErrors[importingPkg], Error{
 						Pos:  old.Error.Pos,
 						Msg:  old.Error.Err,
@@ -534,6 +544,25 @@ func (state *golistState) createDriverResponse(words ...string) (*driverResponse
 			module:          p.Module,
 		}
 
+		if (state.cfg.Mode&TypecheckCgo) != 0 && len(p.CgoFiles) != 0 {
+			if len(p.CompiledGoFiles) > len(p.GoFiles) {
+				// We need the cgo definitions, which are in the first
+				// CompiledGoFile after the non-cgo ones. This is a hack but there
+				// isn't currently a better way to find it. We also need the pure
+				// Go files and unprocessed cgo files, all of which are already
+				// in pkg.GoFiles.
+				cgoTypes := p.CompiledGoFiles[len(p.GoFiles)]
+				pkg.CompiledGoFiles = append([]string{cgoTypes}, pkg.GoFiles...)
+			} else {
+				// golang/go#38990: go list silently fails to do cgo processing
+				pkg.CompiledGoFiles = nil
+				pkg.Errors = append(pkg.Errors, Error{
+					Msg:  "go list failed to return CompiledGoFiles; https://golang.org/issue/38990?",
+					Kind: ListError,
+				})
+			}
+		}
+
 		// Work around https://golang.org/issue/28749:
 		// cmd/go puts assembly, C, and C++ files in CompiledGoFiles.
 		// Filter out any elements of CompiledGoFiles that are also in OtherFiles.
@@ -707,7 +736,7 @@ func golistargs(cfg *Config, words []string) []string {
 func (state *golistState) invokeGo(verb string, args ...string) (*bytes.Buffer, error) {
 	cfg := state.cfg
 
-	inv := &gocommand.Invocation{
+	inv := gocommand.Invocation{
 		Verb:       verb,
 		Args:       args,
 		BuildFlags: cfg.BuildFlags,
@@ -715,8 +744,11 @@ func (state *golistState) invokeGo(verb string, args ...string) (*bytes.Buffer,
 		Logf:       cfg.Logf,
 		WorkingDir: cfg.Dir,
 	}
-
-	stdout, stderr, _, err := inv.RunRaw(cfg.Context)
+	gocmdRunner := cfg.gocmdRunner
+	if gocmdRunner == nil {
+		gocmdRunner = &gocommand.Runner{}
+	}
+	stdout, stderr, _, err := gocmdRunner.RunRaw(cfg.Context, inv)
 	if err != nil {
 		// Check for 'go' executable not being found.
 		if ee, ok := err.(*exec.Error); ok && ee.Err == exec.ErrNotFound {
@@ -727,7 +759,7 @@ func (state *golistState) invokeGo(verb string, args ...string) (*bytes.Buffer,
 		if !ok {
 			// Catastrophic error:
 			// - context cancellation
-			return nil, fmt.Errorf("couldn't run 'go': %v", err)
+			return nil, xerrors.Errorf("couldn't run 'go': %w", err)
 		}
 
 		// Old go version?

vendor/golang.org/x/tools/go/packages/golist_overlay.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"go/parser"
 	"go/token"
+	"log"
 	"os"
 	"path/filepath"
 	"sort"
@@ -22,10 +23,15 @@ func (state *golistState) processGolistOverlay(response *responseDeduper) (modif
 	needPkgsSet := make(map[string]bool)
 	modifiedPkgsSet := make(map[string]bool)
 
+	pkgOfDir := make(map[string][]*Package)
 	for _, pkg := range response.dr.Packages {
 		// This is an approximation of import path to id. This can be
 		// wrong for tests, vendored packages, and a number of other cases.
 		havePkgs[pkg.PkgPath] = pkg.ID
+		x := commonDir(pkg.GoFiles)
+		if x != "" {
+			pkgOfDir[x] = append(pkgOfDir[x], pkg)
+		}
 	}
 
 	// If no new imports are added, it is safe to avoid loading any needPkgs.
@@ -64,6 +70,9 @@ func (state *golistState) processGolistOverlay(response *responseDeduper) (modif
 			// to the overlay.
 			continue
 		}
+		// if all the overlay files belong to a different package, change the package
+		// name to that package. Otherwise leave it alone; there will be an error message.
+		maybeFixPackageName(pkgName, pkgOfDir, dir)
 	nextPackage:
 		for _, p := range response.dr.Packages {
 			if pkgName != p.Name && p.ID != "command-line-arguments" {
@@ -282,7 +291,17 @@ func (state *golistState) determineRootDirs() (map[string]string, error) {
 }
 
 func (state *golistState) determineRootDirsModules() (map[string]string, error) {
-	out, err := state.invokeGo("list", "-m", "-json", "all")
+	// This will only return the root directory for the main module.
+	// For now we only support overlays in main modules.
+	// Editing files in the module cache isn't a great idea, so we don't
+	// plan to ever support that, but editing files in replaced modules
+	// is something we may want to support. To do that, we'll want to
+	// do a go list -m to determine the replaced module's module path and
+	// directory, and then a go list -m {{with .Replace}}{{.Dir}}{{end}} <replaced module's path>
+	// from the main module to determine if that module is actually a replacement.
+	// See bcmills's comment here: https://github.com/golang/go/issues/37629#issuecomment-594179751
+	// for more information.
+	out, err := state.invokeGo("list", "-m", "-json")
 	if err != nil {
 		return nil, err
 	}
@@ -374,3 +393,46 @@ func extractPackageName(filename string, contents []byte) (string, bool) {
 	}
 	return f.Name.Name, true
 }
+
+func commonDir(a []string) string {
+	seen := make(map[string]bool)
+	x := append([]string{}, a...)
+	for _, f := range x {
+		seen[filepath.Dir(f)] = true
+	}
+	if len(seen) > 1 {
+		log.Fatalf("commonDir saw %v for %v", seen, x)
+	}
+	for k := range seen {
+		// len(seen) == 1
+		return k
+	}
+	return "" // no files
+}
+
+// It is possible that the files in the disk directory dir have a different package
+// name from newName, which is deduced from the overlays. If they all have a different
+// package name, and they all have the same package name, then that name becomes
+// the package name.
+// It returns true if it changes the package name, false otherwise.
+func maybeFixPackageName(newName string, pkgOfDir map[string][]*Package, dir string) bool {
+	names := make(map[string]int)
+	for _, p := range pkgOfDir[dir] {
+		names[p.Name]++
+	}
+	if len(names) != 1 {
+		// some files are in different packages
+		return false
+	}
+	oldName := ""
+	for k := range names {
+		oldName = k
+	}
+	if newName == oldName {
+		return false
+	}
+	for _, p := range pkgOfDir[dir] {
+		p.Name = newName
+	}
+	return true
+}

vendor/golang.org/x/tools/go/packages/loadmode_string.go

@@ -38,7 +38,7 @@ var modeStrings = []string{
 func (mod LoadMode) String() string {
 	m := mod
 	if m == 0 {
-		return fmt.Sprintf("LoadMode(0)")
+		return "LoadMode(0)"
 	}
 	var out []string
 	for i, x := range allModes {

vendor/golang.org/x/tools/go/packages/packages.go

@@ -19,10 +19,12 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"reflect"
 	"strings"
 	"sync"
 
 	"golang.org/x/tools/go/gcexportdata"
+	"golang.org/x/tools/internal/gocommand"
 	"golang.org/x/tools/internal/packagesinternal"
 )
 
@@ -69,6 +71,10 @@ const (
 
 	// NeedTypesSizes adds TypesSizes.
 	NeedTypesSizes
+
+	// TypecheckCgo enables full support for type checking cgo. Requires Go 1.15+.
+	// Modifies CompiledGoFiles and Types, and has no effect on its own.
+	TypecheckCgo
 )
 
 const (
@@ -127,6 +133,9 @@ type Config struct {
 	//
 	Env []string
 
+	// gocmdRunner guards go command calls from concurrency errors.
+	gocmdRunner *gocommand.Runner
+
 	// BuildFlags is a list of command-line flags to be passed through to
 	// the build system's query tool.
 	BuildFlags []string
@@ -253,7 +262,7 @@ type Package struct {
 	GoFiles []string
 
 	// CompiledGoFiles lists the absolute file paths of the package's source
-	// files that were presented to the compiler.
+	// files that are suitable for type checking.
 	// This may differ from GoFiles if files are processed before compilation.
 	CompiledGoFiles []string
 
@@ -311,6 +320,12 @@ func init() {
 	packagesinternal.GetModule = func(p interface{}) *packagesinternal.Module {
 		return p.(*Package).module
 	}
+	packagesinternal.GetGoCmdRunner = func(config interface{}) *gocommand.Runner {
+		return config.(*Config).gocmdRunner
+	}
+	packagesinternal.SetGoCmdRunner = func(config interface{}, runner *gocommand.Runner) {
+		config.(*Config).gocmdRunner = runner
+	}
 }
 
 // An Error describes a problem with a package's metadata, syntax, or types.
@@ -473,6 +488,9 @@ func newLoader(cfg *Config) *loader {
 	if ld.Config.Env == nil {
 		ld.Config.Env = os.Environ()
 	}
+	if ld.Config.gocmdRunner == nil {
+		ld.Config.gocmdRunner = &gocommand.Runner{}
+	}
 	if ld.Context == nil {
 		ld.Context = context.Background()
 	}
@@ -865,6 +883,19 @@ func (ld *loader) loadPackage(lpkg *loaderPackage) {
 		Error: appendError,
 		Sizes: ld.sizes,
 	}
+	if (ld.Mode & TypecheckCgo) != 0 {
+		// TODO: remove this when we stop supporting 1.14.
+		rtc := reflect.ValueOf(tc).Elem()
+		usesCgo := rtc.FieldByName("UsesCgo")
+		if !usesCgo.IsValid() {
+			appendError(Error{
+				Msg:  "TypecheckCgo requires Go 1.15+",
+				Kind: ListError,
+			})
+			return
+		}
+		usesCgo.SetBool(true)
+	}
 	types.NewChecker(tc, ld.Fset, lpkg.Types, lpkg.TypesInfo).Files(lpkg.Syntax)
 
 	lpkg.importErrors = nil // no longer needed

vendor/golang.org/x/tools/go/types/objectpath/objectpath.go

@@ -226,7 +226,8 @@ func For(obj types.Object) (Path, error) {
 	// the best paths because non-types may
 	// refer to types, but not the reverse.
 	empty := make([]byte, 0, 48) // initial space
-	for _, name := range scope.Names() {
+	names := scope.Names()
+	for _, name := range names {
 		o := scope.Lookup(name)
 		tname, ok := o.(*types.TypeName)
 		if !ok {
@@ -253,7 +254,7 @@ func For(obj types.Object) (Path, error) {
 
 	// Then inspect everything else:
 	// non-types, and declared methods of defined types.
-	for _, name := range scope.Names() {
+	for _, name := range names {
 		o := scope.Lookup(name)
 		path := append(empty, name...)
 		if _, ok := o.(*types.TypeName); !ok {

vendor/golang.org/x/tools/internal/analysisinternal/analysis.go

@@ -0,0 +1,118 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package analysisinternal exposes internal-only fields from go/analysis.
+package analysisinternal
+
+import (
+	"bytes"
+	"fmt"
+	"go/ast"
+	"go/token"
+	"go/types"
+	"strings"
+
+	"golang.org/x/tools/go/ast/astutil"
+)
+
+func TypeErrorEndPos(fset *token.FileSet, src []byte, start token.Pos) token.Pos {
+	// Get the end position for the type error.
+	offset, end := fset.PositionFor(start, false).Offset, start
+	if offset >= len(src) {
+		return end
+	}
+	if width := bytes.IndexAny(src[offset:], " \n,():;[]+-*"); width > 0 {
+		end = start + token.Pos(width)
+	}
+	return end
+}
+
+func ZeroValue(fset *token.FileSet, f *ast.File, pkg *types.Package, typ types.Type) ast.Expr {
+	under := typ
+	if n, ok := typ.(*types.Named); ok {
+		under = n.Underlying()
+	}
+	switch u := under.(type) {
+	case *types.Basic:
+		switch {
+		case u.Info()&types.IsNumeric != 0:
+			return &ast.BasicLit{Kind: token.INT, Value: "0"}
+		case u.Info()&types.IsBoolean != 0:
+			return &ast.Ident{Name: "false"}
+		case u.Info()&types.IsString != 0:
+			return &ast.BasicLit{Kind: token.STRING, Value: `""`}
+		default:
+			panic("unknown basic type")
+		}
+	case *types.Chan, *types.Interface, *types.Map, *types.Pointer, *types.Signature, *types.Slice:
+		return ast.NewIdent("nil")
+	case *types.Struct:
+		texpr := typeExpr(fset, f, pkg, typ) // typ because we want the name here.
+		if texpr == nil {
+			return nil
+		}
+		return &ast.CompositeLit{
+			Type: texpr,
+		}
+	case *types.Array:
+		texpr := typeExpr(fset, f, pkg, u.Elem())
+		if texpr == nil {
+			return nil
+		}
+		return &ast.CompositeLit{
+			Type: &ast.ArrayType{
+				Elt: texpr,
+				Len: &ast.BasicLit{Kind: token.INT, Value: fmt.Sprintf("%v", u.Len())},
+			},
+		}
+	}
+	return nil
+}
+
+func typeExpr(fset *token.FileSet, f *ast.File, pkg *types.Package, typ types.Type) ast.Expr {
+	switch t := typ.(type) {
+	case *types.Basic:
+		switch t.Kind() {
+		case types.UnsafePointer:
+			return &ast.SelectorExpr{X: ast.NewIdent("unsafe"), Sel: ast.NewIdent("Pointer")}
+		default:
+			return ast.NewIdent(t.Name())
+		}
+	case *types.Named:
+		if t.Obj().Pkg() == pkg {
+			return ast.NewIdent(t.Obj().Name())
+		}
+		pkgName := t.Obj().Pkg().Name()
+		// If the file already imports the package under another name, use that.
+		for _, group := range astutil.Imports(fset, f) {
+			for _, cand := range group {
+				if strings.Trim(cand.Path.Value, `"`) == t.Obj().Pkg().Path() {
+					if cand.Name != nil && cand.Name.Name != "" {
+						pkgName = cand.Name.Name
+					}
+				}
+			}
+		}
+		if pkgName == "." {
+			return ast.NewIdent(t.Obj().Name())
+		}
+		return &ast.SelectorExpr{
+			X:   ast.NewIdent(pkgName),
+			Sel: ast.NewIdent(t.Obj().Name()),
+		}
+	default:
+		return nil // TODO: anonymous structs, but who does that
+	}
+}
+
+var GetTypeErrors = func(p interface{}) []types.Error { return nil }
+var SetTypeErrors = func(p interface{}, errors []types.Error) {}
+
+type TypeErrorPass string
+
+const (
+	NoNewVars      TypeErrorPass = "nonewvars"
+	NoResultValues TypeErrorPass = "noresultvalues"
+	UndeclaredName TypeErrorPass = "undeclaredname"
+)

vendor/golang.org/x/tools/internal/event/core/event.go

@@ -0,0 +1,85 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package core provides support for event based telemetry.
+package core
+
+import (
+	"fmt"
+	"time"
+
+	"golang.org/x/tools/internal/event/label"
+)
+
+// Event holds the information about an event of note that ocurred.
+type Event struct {
+	at time.Time
+
+	// As events are often on the stack, storing the first few labels directly
+	// in the event can avoid an allocation at all for the very common cases of
+	// simple events.
+	// The length needs to be large enough to cope with the majority of events
+	// but no so large as to cause undue stack pressure.
+	// A log message with two values will use 3 labels (one for each value and
+	// one for the message itself).
+
+	static  [3]label.Label // inline storage for the first few labels
+	dynamic []label.Label  // dynamically sized storage for remaining labels
+}
+
+// eventLabelMap implements label.Map for a the labels of an Event.
+type eventLabelMap struct {
+	event Event
+}
+
+func (ev Event) At() time.Time { return ev.at }
+
+func (ev Event) Format(f fmt.State, r rune) {
+	if !ev.at.IsZero() {
+		fmt.Fprint(f, ev.at.Format("2006/01/02 15:04:05 "))
+	}
+	for index := 0; ev.Valid(index); index++ {
+		if l := ev.Label(index); l.Valid() {
+			fmt.Fprintf(f, "\n\t%v", l)
+		}
+	}
+}
+
+func (ev Event) Valid(index int) bool {
+	return index >= 0 && index < len(ev.static)+len(ev.dynamic)
+}
+
+func (ev Event) Label(index int) label.Label {
+	if index < len(ev.static) {
+		return ev.static[index]
+	}
+	return ev.dynamic[index-len(ev.static)]
+}
+
+func (ev Event) Find(key label.Key) label.Label {
+	for _, l := range ev.static {
+		if l.Key() == key {
+			return l
+		}
+	}
+	for _, l := range ev.dynamic {
+		if l.Key() == key {
+			return l
+		}
+	}
+	return label.Label{}
+}
+
+func MakeEvent(static [3]label.Label, labels []label.Label) Event {
+	return Event{
+		static:  static,
+		dynamic: labels,
+	}
+}
+
+// CloneEvent event returns a copy of the event with the time adjusted to at.
+func CloneEvent(ev Event, at time.Time) Event {
+	ev.at = at
+	return ev
+}

vendor/golang.org/x/tools/internal/event/core/export.go

@@ -0,0 +1,70 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"context"
+	"sync/atomic"
+	"time"
+	"unsafe"
+
+	"golang.org/x/tools/internal/event/label"
+)
+
+// Exporter is a function that handles events.
+// It may return a modified context and event.
+type Exporter func(context.Context, Event, label.Map) context.Context
+
+var (
+	exporter unsafe.Pointer
+)
+
+// SetExporter sets the global exporter function that handles all events.
+// The exporter is called synchronously from the event call site, so it should
+// return quickly so as not to hold up user code.
+func SetExporter(e Exporter) {
+	p := unsafe.Pointer(&e)
+	if e == nil {
+		// &e is always valid, and so p is always valid, but for the early abort
+		// of ProcessEvent to be efficient it needs to make the nil check on the
+		// pointer without having to dereference it, so we make the nil function
+		// also a nil pointer
+		p = nil
+	}
+	atomic.StorePointer(&exporter, p)
+}
+
+// deliver is called to deliver an event to the supplied exporter.
+// it will fill in the time.
+func deliver(ctx context.Context, exporter Exporter, ev Event) context.Context {
+	// add the current time to the event
+	ev.at = time.Now()
+	// hand the event off to the current exporter
+	return exporter(ctx, ev, ev)
+}
+
+// Export is called to deliver an event to the global exporter if set.
+func Export(ctx context.Context, ev Event) context.Context {
+	// get the global exporter and abort early if there is not one
+	exporterPtr := (*Exporter)(atomic.LoadPointer(&exporter))
+	if exporterPtr == nil {
+		return ctx
+	}
+	return deliver(ctx, *exporterPtr, ev)
+}
+
+// ExportPair is called to deliver a start event to the supplied exporter.
+// It also returns a function that will deliver the end event to the same
+// exporter.
+// It will fill in the time.
+func ExportPair(ctx context.Context, begin, end Event) (context.Context, func()) {
+	// get the global exporter and abort early if there is not one
+	exporterPtr := (*Exporter)(atomic.LoadPointer(&exporter))
+	if exporterPtr == nil {
+		return ctx, func() {}
+	}
+	ctx = deliver(ctx, *exporterPtr, begin)
+	return ctx, func() { deliver(ctx, *exporterPtr, end) }
+}

vendor/golang.org/x/tools/internal/event/core/fast.go

@@ -0,0 +1,77 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"context"
+
+	"golang.org/x/tools/internal/event/keys"
+	"golang.org/x/tools/internal/event/label"
+)
+
+// Log1 takes a message and one label delivers a log event to the exporter.
+// It is a customized version of Print that is faster and does no allocation.
+func Log1(ctx context.Context, message string, t1 label.Label) {
+	Export(ctx, MakeEvent([3]label.Label{
+		keys.Msg.Of(message),
+		t1,
+	}, nil))
+}
+
+// Log2 takes a message and two labels and delivers a log event to the exporter.
+// It is a customized version of Print that is faster and does no allocation.
+func Log2(ctx context.Context, message string, t1 label.Label, t2 label.Label) {
+	Export(ctx, MakeEvent([3]label.Label{
+		keys.Msg.Of(message),
+		t1,
+		t2,
+	}, nil))
+}
+
+// Metric1 sends a label event to the exporter with the supplied labels.
+func Metric1(ctx context.Context, t1 label.Label) context.Context {
+	return Export(ctx, MakeEvent([3]label.Label{
+		keys.Metric.New(),
+		t1,
+	}, nil))
+}
+
+// Metric2 sends a label event to the exporter with the supplied labels.
+func Metric2(ctx context.Context, t1, t2 label.Label) context.Context {
+	return Export(ctx, MakeEvent([3]label.Label{
+		keys.Metric.New(),
+		t1,
+		t2,
+	}, nil))
+}
+
+// Start1 sends a span start event with the supplied label list to the exporter.
+// It also returns a function that will end the span, which should normally be
+// deferred.
+func Start1(ctx context.Context, name string, t1 label.Label) (context.Context, func()) {
+	return ExportPair(ctx,
+		MakeEvent([3]label.Label{
+			keys.Start.Of(name),
+			t1,
+		}, nil),
+		MakeEvent([3]label.Label{
+			keys.End.New(),
+		}, nil))
+}
+
+// Start2 sends a span start event with the supplied label list to the exporter.
+// It also returns a function that will end the span, which should normally be
+// deferred.
+func Start2(ctx context.Context, name string, t1, t2 label.Label) (context.Context, func()) {
+	return ExportPair(ctx,
+		MakeEvent([3]label.Label{
+			keys.Start.Of(name),
+			t1,
+			t2,
+		}, nil),
+		MakeEvent([3]label.Label{
+			keys.End.New(),
+		}, nil))
+}

vendor/golang.org/x/tools/internal/event/doc.go

@@ -0,0 +1,7 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package event provides a set of packages that cover the main
+// concepts of telemetry in an implementation agnostic way.
+package event

vendor/golang.org/x/tools/internal/event/event.go

@@ -0,0 +1,127 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package event
+
+import (
+	"context"
+
+	"golang.org/x/tools/internal/event/core"
+	"golang.org/x/tools/internal/event/keys"
+	"golang.org/x/tools/internal/event/label"
+)
+
+// Exporter is a function that handles events.
+// It may return a modified context and event.
+type Exporter func(context.Context, core.Event, label.Map) context.Context
+
+// SetExporter sets the global exporter function that handles all events.
+// The exporter is called synchronously from the event call site, so it should
+// return quickly so as not to hold up user code.
+func SetExporter(e Exporter) {
+	core.SetExporter(core.Exporter(e))
+}
+
+// Log takes a message and a label list and combines them into a single event
+// before delivering them to the exporter.
+func Log(ctx context.Context, message string, labels ...label.Label) {
+	core.Export(ctx, core.MakeEvent([3]label.Label{
+		keys.Msg.Of(message),
+	}, labels))
+}
+
+// IsLog returns true if the event was built by the Log function.
+// It is intended to be used in exporters to identify the semantics of the
+// event when deciding what to do with it.
+func IsLog(ev core.Event) bool {
+	return ev.Label(0).Key() == keys.Msg
+}
+
+// Error takes a message and a label list and combines them into a single event
+// before delivering them to the exporter. It captures the error in the
+// delivered event.
+func Error(ctx context.Context, message string, err error, labels ...label.Label) {
+	core.Export(ctx, core.MakeEvent([3]label.Label{
+		keys.Msg.Of(message),
+		keys.Err.Of(err),
+	}, labels))
+}
+
+// IsError returns true if the event was built by the Error function.
+// It is intended to be used in exporters to identify the semantics of the
+// event when deciding what to do with it.
+func IsError(ev core.Event) bool {
+	return ev.Label(0).Key() == keys.Msg &&
+		ev.Label(1).Key() == keys.Err
+}
+
+// Metric sends a label event to the exporter with the supplied labels.
+func Metric(ctx context.Context, labels ...label.Label) {
+	core.Export(ctx, core.MakeEvent([3]label.Label{
+		keys.Metric.New(),
+	}, labels))
+}
+
+// IsMetric returns true if the event was built by the Metric function.
+// It is intended to be used in exporters to identify the semantics of the
+// event when deciding what to do with it.
+func IsMetric(ev core.Event) bool {
+	return ev.Label(0).Key() == keys.Metric
+}
+
+// Label sends a label event to the exporter with the supplied labels.
+func Label(ctx context.Context, labels ...label.Label) context.Context {
+	return core.Export(ctx, core.MakeEvent([3]label.Label{
+		keys.Label.New(),
+	}, labels))
+}
+
+// IsLabel returns true if the event was built by the Label function.
+// It is intended to be used in exporters to identify the semantics of the
+// event when deciding what to do with it.
+func IsLabel(ev core.Event) bool {
+	return ev.Label(0).Key() == keys.Label
+}
+
+// Start sends a span start event with the supplied label list to the exporter.
+// It also returns a function that will end the span, which should normally be
+// deferred.
+func Start(ctx context.Context, name string, labels ...label.Label) (context.Context, func()) {
+	return core.ExportPair(ctx,
+		core.MakeEvent([3]label.Label{
+			keys.Start.Of(name),
+		}, labels),
+		core.MakeEvent([3]label.Label{
+			keys.End.New(),
+		}, nil))
+}
+
+// IsStart returns true if the event was built by the Start function.
+// It is intended to be used in exporters to identify the semantics of the
+// event when deciding what to do with it.
+func IsStart(ev core.Event) bool {
+	return ev.Label(0).Key() == keys.Start
+}
+
+// IsEnd returns true if the event was built by the End function.
+// It is intended to be used in exporters to identify the semantics of the
+// event when deciding what to do with it.
+func IsEnd(ev core.Event) bool {
+	return ev.Label(0).Key() == keys.End
+}
+
+// Detach returns a context without an associated span.
+// This allows the creation of spans that are not children of the current span.
+func Detach(ctx context.Context) context.Context {
+	return core.Export(ctx, core.MakeEvent([3]label.Label{
+		keys.Detach.New(),
+	}, nil))
+}
+
+// IsDetach returns true if the event was built by the Detach function.
+// It is intended to be used in exporters to identify the semantics of the
+// event when deciding what to do with it.
+func IsDetach(ev core.Event) bool {
+	return ev.Label(0).Key() == keys.Detach
+}

vendor/golang.org/x/tools/internal/event/keys/keys.go

@@ -0,0 +1,564 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package keys
+
+import (
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+
+	"golang.org/x/tools/internal/event/label"
+)
+
+// Value represents a key for untyped values.
+type Value struct {
+	name        string
+	description string
+}
+
+// New creates a new Key for untyped values.
+func New(name, description string) *Value {
+	return &Value{name: name, description: description}
+}
+
+func (k *Value) Name() string        { return k.name }
+func (k *Value) Description() string { return k.description }
+
+func (k *Value) Format(w io.Writer, buf []byte, l label.Label) {
+	fmt.Fprint(w, k.From(l))
+}
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Value) Get(lm label.Map) interface{} {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return nil
+}
+
+// From can be used to get a value from a Label.
+func (k *Value) From(t label.Label) interface{} { return t.UnpackValue() }
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Value) Of(value interface{}) label.Label { return label.OfValue(k, value) }
+
+// Tag represents a key for tagging labels that have no value.
+// These are used when the existence of the label is the entire information it
+// carries, such as marking events to be of a specific kind, or from a specific
+// package.
+type Tag struct {
+	name        string
+	description string
+}
+
+// NewTag creates a new Key for tagging labels.
+func NewTag(name, description string) *Tag {
+	return &Tag{name: name, description: description}
+}
+
+func (k *Tag) Name() string        { return k.name }
+func (k *Tag) Description() string { return k.description }
+
+func (k *Tag) Format(w io.Writer, buf []byte, l label.Label) {}
+
+// New creates a new Label with this key.
+func (k *Tag) New() label.Label { return label.OfValue(k, nil) }
+
+// Int represents a key
+type Int struct {
+	name        string
+	description string
+}
+
+// NewInt creates a new Key for int values.
+func NewInt(name, description string) *Int {
+	return &Int{name: name, description: description}
+}
+
+func (k *Int) Name() string        { return k.name }
+func (k *Int) Description() string { return k.description }
+
+func (k *Int) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendInt(buf, int64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Int) Of(v int) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Int) Get(lm label.Map) int {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *Int) From(t label.Label) int { return int(t.Unpack64()) }
+
+// Int8 represents a key
+type Int8 struct {
+	name        string
+	description string
+}
+
+// NewInt8 creates a new Key for int8 values.
+func NewInt8(name, description string) *Int8 {
+	return &Int8{name: name, description: description}
+}
+
+func (k *Int8) Name() string        { return k.name }
+func (k *Int8) Description() string { return k.description }
+
+func (k *Int8) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendInt(buf, int64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Int8) Of(v int8) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Int8) Get(lm label.Map) int8 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *Int8) From(t label.Label) int8 { return int8(t.Unpack64()) }
+
+// Int16 represents a key
+type Int16 struct {
+	name        string
+	description string
+}
+
+// NewInt16 creates a new Key for int16 values.
+func NewInt16(name, description string) *Int16 {
+	return &Int16{name: name, description: description}
+}
+
+func (k *Int16) Name() string        { return k.name }
+func (k *Int16) Description() string { return k.description }
+
+func (k *Int16) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendInt(buf, int64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Int16) Of(v int16) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Int16) Get(lm label.Map) int16 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *Int16) From(t label.Label) int16 { return int16(t.Unpack64()) }
+
+// Int32 represents a key
+type Int32 struct {
+	name        string
+	description string
+}
+
+// NewInt32 creates a new Key for int32 values.
+func NewInt32(name, description string) *Int32 {
+	return &Int32{name: name, description: description}
+}
+
+func (k *Int32) Name() string        { return k.name }
+func (k *Int32) Description() string { return k.description }
+
+func (k *Int32) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendInt(buf, int64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Int32) Of(v int32) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Int32) Get(lm label.Map) int32 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *Int32) From(t label.Label) int32 { return int32(t.Unpack64()) }
+
+// Int64 represents a key
+type Int64 struct {
+	name        string
+	description string
+}
+
+// NewInt64 creates a new Key for int64 values.
+func NewInt64(name, description string) *Int64 {
+	return &Int64{name: name, description: description}
+}
+
+func (k *Int64) Name() string        { return k.name }
+func (k *Int64) Description() string { return k.description }
+
+func (k *Int64) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendInt(buf, k.From(l), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Int64) Of(v int64) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Int64) Get(lm label.Map) int64 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *Int64) From(t label.Label) int64 { return int64(t.Unpack64()) }
+
+// UInt represents a key
+type UInt struct {
+	name        string
+	description string
+}
+
+// NewUInt creates a new Key for uint values.
+func NewUInt(name, description string) *UInt {
+	return &UInt{name: name, description: description}
+}
+
+func (k *UInt) Name() string        { return k.name }
+func (k *UInt) Description() string { return k.description }
+
+func (k *UInt) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendUint(buf, uint64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *UInt) Of(v uint) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *UInt) Get(lm label.Map) uint {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *UInt) From(t label.Label) uint { return uint(t.Unpack64()) }
+
+// UInt8 represents a key
+type UInt8 struct {
+	name        string
+	description string
+}
+
+// NewUInt8 creates a new Key for uint8 values.
+func NewUInt8(name, description string) *UInt8 {
+	return &UInt8{name: name, description: description}
+}
+
+func (k *UInt8) Name() string        { return k.name }
+func (k *UInt8) Description() string { return k.description }
+
+func (k *UInt8) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendUint(buf, uint64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *UInt8) Of(v uint8) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *UInt8) Get(lm label.Map) uint8 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *UInt8) From(t label.Label) uint8 { return uint8(t.Unpack64()) }
+
+// UInt16 represents a key
+type UInt16 struct {
+	name        string
+	description string
+}
+
+// NewUInt16 creates a new Key for uint16 values.
+func NewUInt16(name, description string) *UInt16 {
+	return &UInt16{name: name, description: description}
+}
+
+func (k *UInt16) Name() string        { return k.name }
+func (k *UInt16) Description() string { return k.description }
+
+func (k *UInt16) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendUint(buf, uint64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *UInt16) Of(v uint16) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *UInt16) Get(lm label.Map) uint16 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *UInt16) From(t label.Label) uint16 { return uint16(t.Unpack64()) }
+
+// UInt32 represents a key
+type UInt32 struct {
+	name        string
+	description string
+}
+
+// NewUInt32 creates a new Key for uint32 values.
+func NewUInt32(name, description string) *UInt32 {
+	return &UInt32{name: name, description: description}
+}
+
+func (k *UInt32) Name() string        { return k.name }
+func (k *UInt32) Description() string { return k.description }
+
+func (k *UInt32) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendUint(buf, uint64(k.From(l)), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *UInt32) Of(v uint32) label.Label { return label.Of64(k, uint64(v)) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *UInt32) Get(lm label.Map) uint32 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *UInt32) From(t label.Label) uint32 { return uint32(t.Unpack64()) }
+
+// UInt64 represents a key
+type UInt64 struct {
+	name        string
+	description string
+}
+
+// NewUInt64 creates a new Key for uint64 values.
+func NewUInt64(name, description string) *UInt64 {
+	return &UInt64{name: name, description: description}
+}
+
+func (k *UInt64) Name() string        { return k.name }
+func (k *UInt64) Description() string { return k.description }
+
+func (k *UInt64) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendUint(buf, k.From(l), 10))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *UInt64) Of(v uint64) label.Label { return label.Of64(k, v) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *UInt64) Get(lm label.Map) uint64 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *UInt64) From(t label.Label) uint64 { return t.Unpack64() }
+
+// Float32 represents a key
+type Float32 struct {
+	name        string
+	description string
+}
+
+// NewFloat32 creates a new Key for float32 values.
+func NewFloat32(name, description string) *Float32 {
+	return &Float32{name: name, description: description}
+}
+
+func (k *Float32) Name() string        { return k.name }
+func (k *Float32) Description() string { return k.description }
+
+func (k *Float32) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendFloat(buf, float64(k.From(l)), 'E', -1, 32))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Float32) Of(v float32) label.Label {
+	return label.Of64(k, uint64(math.Float32bits(v)))
+}
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Float32) Get(lm label.Map) float32 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *Float32) From(t label.Label) float32 {
+	return math.Float32frombits(uint32(t.Unpack64()))
+}
+
+// Float64 represents a key
+type Float64 struct {
+	name        string
+	description string
+}
+
+// NewFloat64 creates a new Key for int64 values.
+func NewFloat64(name, description string) *Float64 {
+	return &Float64{name: name, description: description}
+}
+
+func (k *Float64) Name() string        { return k.name }
+func (k *Float64) Description() string { return k.description }
+
+func (k *Float64) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendFloat(buf, k.From(l), 'E', -1, 64))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Float64) Of(v float64) label.Label {
+	return label.Of64(k, math.Float64bits(v))
+}
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Float64) Get(lm label.Map) float64 {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return 0
+}
+
+// From can be used to get a value from a Label.
+func (k *Float64) From(t label.Label) float64 {
+	return math.Float64frombits(t.Unpack64())
+}
+
+// String represents a key
+type String struct {
+	name        string
+	description string
+}
+
+// NewString creates a new Key for int64 values.
+func NewString(name, description string) *String {
+	return &String{name: name, description: description}
+}
+
+func (k *String) Name() string        { return k.name }
+func (k *String) Description() string { return k.description }
+
+func (k *String) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendQuote(buf, k.From(l)))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *String) Of(v string) label.Label { return label.OfString(k, v) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *String) Get(lm label.Map) string {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return ""
+}
+
+// From can be used to get a value from a Label.
+func (k *String) From(t label.Label) string { return t.UnpackString() }
+
+// Boolean represents a key
+type Boolean struct {
+	name        string
+	description string
+}
+
+// NewBoolean creates a new Key for bool values.
+func NewBoolean(name, description string) *Boolean {
+	return &Boolean{name: name, description: description}
+}
+
+func (k *Boolean) Name() string        { return k.name }
+func (k *Boolean) Description() string { return k.description }
+
+func (k *Boolean) Format(w io.Writer, buf []byte, l label.Label) {
+	w.Write(strconv.AppendBool(buf, k.From(l)))
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Boolean) Of(v bool) label.Label {
+	if v {
+		return label.Of64(k, 1)
+	}
+	return label.Of64(k, 0)
+}
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Boolean) Get(lm label.Map) bool {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return false
+}
+
+// From can be used to get a value from a Label.
+func (k *Boolean) From(t label.Label) bool { return t.Unpack64() > 0 }
+
+// Error represents a key
+type Error struct {
+	name        string
+	description string
+}
+
+// NewError creates a new Key for int64 values.
+func NewError(name, description string) *Error {
+	return &Error{name: name, description: description}
+}
+
+func (k *Error) Name() string        { return k.name }
+func (k *Error) Description() string { return k.description }
+
+func (k *Error) Format(w io.Writer, buf []byte, l label.Label) {
+	io.WriteString(w, k.From(l).Error())
+}
+
+// Of creates a new Label with this key and the supplied value.
+func (k *Error) Of(v error) label.Label { return label.OfValue(k, v) }
+
+// Get can be used to get a label for the key from a label.Map.
+func (k *Error) Get(lm label.Map) error {
+	if t := lm.Find(k); t.Valid() {
+		return k.From(t)
+	}
+	return nil
+}
+
+// From can be used to get a value from a Label.
+func (k *Error) From(t label.Label) error {
+	err, _ := t.UnpackValue().(error)
+	return err
+}

vendor/golang.org/x/tools/internal/event/keys/standard.go

@@ -0,0 +1,22 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package keys
+
+var (
+	// Msg is a key used to add message strings to label lists.
+	Msg = NewString("message", "a readable message")
+	// Label is a key used to indicate an event adds labels to the context.
+	Label = NewTag("label", "a label context marker")
+	// Start is used for things like traces that have a name.
+	Start = NewString("start", "span start")
+	// Metric is a key used to indicate an event records metrics.
+	End = NewTag("end", "a span end marker")
+	// Metric is a key used to indicate an event records metrics.
+	Detach = NewTag("detach", "a span detach marker")
+	// Err is a key used to add error values to label lists.
+	Err = NewError("error", "an error that occurred")
+	// Metric is a key used to indicate an event records metrics.
+	Metric = NewTag("metric", "a metric event marker")
+)

vendor/golang.org/x/tools/internal/event/label/label.go

@@ -0,0 +1,213 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package label
+
+import (
+	"fmt"
+	"io"
+	"reflect"
+	"unsafe"
+)
+
+// Key is used as the identity of a Label.
+// Keys are intended to be compared by pointer only, the name should be unique
+// for communicating with external systems, but it is not required or enforced.
+type Key interface {
+	// Name returns the key name.
+	Name() string
+	// Description returns a string that can be used to describe the value.
+	Description() string
+
+	// Format is used in formatting to append the value of the label to the
+	// supplied buffer.
+	// The formatter may use the supplied buf as a scratch area to avoid
+	// allocations.
+	Format(w io.Writer, buf []byte, l Label)
+}
+
+// Label holds a key and value pair.
+// It is normally used when passing around lists of labels.
+type Label struct {
+	key     Key
+	packed  uint64
+	untyped interface{}
+}
+
+// Map is the interface to a collection of Labels indexed by key.
+type Map interface {
+	// Find returns the label that matches the supplied key.
+	Find(key Key) Label
+}
+
+// List is the interface to something that provides an iterable
+// list of labels.
+// Iteration should start from 0 and continue until Valid returns false.
+type List interface {
+	// Valid returns true if the index is within range for the list.
+	// It does not imply the label at that index will itself be valid.
+	Valid(index int) bool
+	// Label returns the label at the given index.
+	Label(index int) Label
+}
+
+// list implements LabelList for a list of Labels.
+type list struct {
+	labels []Label
+}
+
+// filter wraps a LabelList filtering out specific labels.
+type filter struct {
+	keys       []Key
+	underlying List
+}
+
+// listMap implements LabelMap for a simple list of labels.
+type listMap struct {
+	labels []Label
+}
+
+// mapChain implements LabelMap for a list of underlying LabelMap.
+type mapChain struct {
+	maps []Map
+}
+
+// OfValue creates a new label from the key and value.
+// This method is for implementing new key types, label creation should
+// normally be done with the Of method of the key.
+func OfValue(k Key, value interface{}) Label { return Label{key: k, untyped: value} }
+
+// UnpackValue assumes the label was built using LabelOfValue and returns the value
+// that was passed to that constructor.
+// This method is for implementing new key types, for type safety normal
+// access should be done with the From method of the key.
+func (t Label) UnpackValue() interface{} { return t.untyped }
+
+// Of64 creates a new label from a key and a uint64. This is often
+// used for non uint64 values that can be packed into a uint64.
+// This method is for implementing new key types, label creation should
+// normally be done with the Of method of the key.
+func Of64(k Key, v uint64) Label { return Label{key: k, packed: v} }
+
+// Unpack64 assumes the label was built using LabelOf64 and returns the value that
+// was passed to that constructor.
+// This method is for implementing new key types, for type safety normal
+// access should be done with the From method of the key.
+func (t Label) Unpack64() uint64 { return t.packed }
+
+// OfString creates a new label from a key and a string.
+// This method is for implementing new key types, label creation should
+// normally be done with the Of method of the key.
+func OfString(k Key, v string) Label {
+	hdr := (*reflect.StringHeader)(unsafe.Pointer(&v))
+	return Label{
+		key:     k,
+		packed:  uint64(hdr.Len),
+		untyped: unsafe.Pointer(hdr.Data),
+	}
+}
+
+// UnpackString assumes the label was built using LabelOfString and returns the
+// value that was passed to that constructor.
+// This method is for implementing new key types, for type safety normal
+// access should be done with the From method of the key.
+func (t Label) UnpackString() string {
+	var v string
+	hdr := (*reflect.StringHeader)(unsafe.Pointer(&v))
+	hdr.Data = uintptr(t.untyped.(unsafe.Pointer))
+	hdr.Len = int(t.packed)
+	return *(*string)(unsafe.Pointer(hdr))
+}
+
+// Valid returns true if the Label is a valid one (it has a key).
+func (t Label) Valid() bool { return t.key != nil }
+
+// Key returns the key of this Label.
+func (t Label) Key() Key { return t.key }
+
+// Format is used for debug printing of labels.
+func (t Label) Format(f fmt.State, r rune) {
+	if !t.Valid() {
+		io.WriteString(f, `nil`)
+		return
+	}
+	io.WriteString(f, t.Key().Name())
+	io.WriteString(f, "=")
+	var buf [128]byte
+	t.Key().Format(f, buf[:0], t)
+}
+
+func (l *list) Valid(index int) bool {
+	return index >= 0 && index < len(l.labels)
+}
+
+func (l *list) Label(index int) Label {
+	return l.labels[index]
+}
+
+func (f *filter) Valid(index int) bool {
+	return f.underlying.Valid(index)
+}
+
+func (f *filter) Label(index int) Label {
+	l := f.underlying.Label(index)
+	for _, f := range f.keys {
+		if l.Key() == f {
+			return Label{}
+		}
+	}
+	return l
+}
+
+func (lm listMap) Find(key Key) Label {
+	for _, l := range lm.labels {
+		if l.Key() == key {
+			return l
+		}
+	}
+	return Label{}
+}
+
+func (c mapChain) Find(key Key) Label {
+	for _, src := range c.maps {
+		l := src.Find(key)
+		if l.Valid() {
+			return l
+		}
+	}
+	return Label{}
+}
+
+var emptyList = &list{}
+
+func NewList(labels ...Label) List {
+	if len(labels) == 0 {
+		return emptyList
+	}
+	return &list{labels: labels}
+}
+
+func Filter(l List, keys ...Key) List {
+	if len(keys) == 0 {
+		return l
+	}
+	return &filter{keys: keys, underlying: l}
+}
+
+func NewMap(labels ...Label) Map {
+	return listMap{labels: labels}
+}
+
+func MergeMaps(srcs ...Map) Map {
+	var nonNil []Map
+	for _, src := range srcs {
+		if src != nil {
+			nonNil = append(nonNil, src)
+		}
+	}
+	if len(nonNil) == 1 {
+		return nonNil[0]
+	}
+	return mapChain{maps: nonNil}
+}

vendor/golang.org/x/tools/internal/gocommand/invoke.go

@@ -1,3 +1,7 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 // Package gocommand is a helper for calling the go command.
 package gocommand
 
@@ -8,10 +12,70 @@ import (
 	"io"
 	"os"
 	"os/exec"
+	"regexp"
 	"strings"
+	"sync"
 	"time"
+
+	"golang.org/x/tools/internal/event"
 )
 
+// An Runner will run go command invocations and serialize
+// them if it sees a concurrency error.
+type Runner struct {
+	// LoadMu guards packages.Load calls and associated state.
+	loadMu         sync.Mutex
+	serializeLoads int
+}
+
+// 1.13: go: updates to go.mod needed, but contents have changed
+// 1.14: go: updating go.mod: existing contents have changed since last read
+var modConcurrencyError = regexp.MustCompile(`go:.*go.mod.*contents have changed`)
+
+// Run calls Runner.RunRaw, serializing requests if they fight over
+// go.mod changes.
+func (runner *Runner) Run(ctx context.Context, inv Invocation) (*bytes.Buffer, error) {
+	stdout, _, friendly, _ := runner.RunRaw(ctx, inv)
+	return stdout, friendly
+}
+
+// RunRaw calls Invocation.runRaw, serializing requests if they fight over
+// go.mod changes.
+func (runner *Runner) RunRaw(ctx context.Context, inv Invocation) (*bytes.Buffer, *bytes.Buffer, error, error) {
+	// We want to run invocations concurrently as much as possible. However,
+	// if go.mod updates are needed, only one can make them and the others will
+	// fail. We need to retry in those cases, but we don't want to thrash so
+	// badly we never recover. To avoid that, once we've seen one concurrency
+	// error, start serializing everything until the backlog has cleared out.
+	runner.loadMu.Lock()
+	var locked bool // If true, we hold the mutex and have incremented.
+	if runner.serializeLoads == 0 {
+		runner.loadMu.Unlock()
+	} else {
+		locked = true
+		runner.serializeLoads++
+	}
+	defer func() {
+		if locked {
+			runner.serializeLoads--
+			runner.loadMu.Unlock()
+		}
+	}()
+
+	for {
+		stdout, stderr, friendlyErr, err := inv.runRaw(ctx)
+		if friendlyErr == nil || !modConcurrencyError.MatchString(friendlyErr.Error()) {
+			return stdout, stderr, friendlyErr, err
+		}
+		event.Error(ctx, "Load concurrency error, will retry serially", err)
+		if !locked {
+			runner.loadMu.Lock()
+			runner.serializeLoads++
+			locked = true
+		}
+	}
+}
+
 // An Invocation represents a call to the go command.
 type Invocation struct {
 	Verb       string
@@ -22,20 +86,14 @@ type Invocation struct {
 	Logf       func(format string, args ...interface{})
 }
 
-// Run runs the invocation, returning its stdout and an error suitable for
-// human consumption, including stderr.
-func (i *Invocation) Run(ctx context.Context) (*bytes.Buffer, error) {
-	stdout, _, friendly, _ := i.RunRaw(ctx)
-	return stdout, friendly
-}
-
 // RunRaw is like RunPiped, but also returns the raw stderr and error for callers
 // that want to do low-level error handling/recovery.
-func (i *Invocation) RunRaw(ctx context.Context) (stdout *bytes.Buffer, stderr *bytes.Buffer, friendlyError error, rawError error) {
+func (i *Invocation) runRaw(ctx context.Context) (stdout *bytes.Buffer, stderr *bytes.Buffer, friendlyError error, rawError error) {
 	stdout = &bytes.Buffer{}
 	stderr = &bytes.Buffer{}
 	rawError = i.RunPiped(ctx, stdout, stderr)
 	if rawError != nil {
+		friendlyError = rawError
 		// Check for 'go' executable not being found.
 		if ee, ok := rawError.(*exec.Error); ok && ee.Err == exec.ErrNotFound {
 			friendlyError = fmt.Errorf("go command required, not found: %v", ee)
@@ -43,7 +101,7 @@ func (i *Invocation) RunRaw(ctx context.Context) (stdout *bytes.Buffer, stderr *
 		if ctx.Err() != nil {
 			friendlyError = ctx.Err()
 		}
-		friendlyError = fmt.Errorf("err: %v: stderr: %s", rawError, stderr)
+		friendlyError = fmt.Errorf("err: %v: stderr: %s", friendlyError, stderr)
 	}
 	return
 }
@@ -78,8 +136,11 @@ func (i *Invocation) RunPiped(ctx context.Context, stdout, stderr io.Writer) err
 	// The Go stdlib has a special feature where if the cwd and the PWD are the
 	// same node then it trusts the PWD, so by setting it in the env for the child
 	// process we fix up all the paths returned by the go command.
-	cmd.Env = append(append([]string{}, i.Env...), "PWD="+i.WorkingDir)
-	cmd.Dir = i.WorkingDir
+	cmd.Env = append(os.Environ(), i.Env...)
+	if i.WorkingDir != "" {
+		cmd.Env = append(cmd.Env, "PWD="+i.WorkingDir)
+		cmd.Dir = i.WorkingDir
+	}
 
 	defer func(start time.Time) { log("%s for %v", time.Since(start), cmdDebugStr(cmd)) }(time.Now())
 

vendor/golang.org/x/tools/internal/imports/fix.go

@@ -50,7 +50,8 @@ var importToGroup = []func(env *ProcessEnv, importPath string) (num int, ok bool
 		return
 	},
 	func(_ *ProcessEnv, importPath string) (num int, ok bool) {
-		if strings.Contains(importPath, ".") {
+		firstComponent := strings.Split(importPath, "/")[0]
+		if strings.Contains(firstComponent, ".") {
 			return 1, true
 		}
 		return
@@ -747,6 +748,8 @@ func getPackageExports(ctx context.Context, wrapped func(PackageExport), searchP
 type ProcessEnv struct {
 	LocalPrefix string
 
+	GocmdRunner *gocommand.Runner
+
 	BuildFlags []string
 
 	// If non-empty, these will be used instead of the
@@ -830,7 +833,7 @@ func (e *ProcessEnv) invokeGo(ctx context.Context, verb string, args ...string)
 		Logf:       e.Logf,
 		WorkingDir: e.WorkingDir,
 	}
-	return inv.Run(ctx)
+	return e.GocmdRunner.Run(ctx, inv)
 }
 
 func addStdlibCandidates(pass *pass, refs references) {

vendor/golang.org/x/tools/internal/imports/imports.go

@@ -27,6 +27,7 @@ import (
 	"strings"
 
 	"golang.org/x/tools/go/ast/astutil"
+	"golang.org/x/tools/internal/gocommand"
 )
 
 // Options is golang.org/x/tools/imports.Options with extra internal-only options.
@@ -154,6 +155,10 @@ func initialize(filename string, src []byte, opt *Options) ([]byte, *Options, er
 			GOSUMDB:     os.Getenv("GOSUMDB"),
 		}
 	}
+	// Set the gocmdRunner if the user has not provided it.
+	if opt.Env.GocmdRunner == nil {
+		opt.Env.GocmdRunner = &gocommand.Runner{}
+	}
 	if src == nil {
 		b, err := ioutil.ReadFile(filename)
 		if err != nil {