Add a /user/login landing page option (#9622)

* Add a /user/login landing page option

* Add test case for login landing page

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -186,7 +186,7 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 - `STATIC_ROOT_PATH`: **./**: Upper level of template and static files path.
 - `STATIC_CACHE_TIME`: **6h**: Web browser cache time for static resources on `custom/`, `public/` and all uploaded avatars.
 - `ENABLE_GZIP`: **false**: Enables application-level GZIP support.
-- `LANDING_PAGE`: **home**: Landing page for unauthenticated users  \[home, explore\].
+- `LANDING_PAGE`: **home**: Landing page for unauthenticated users \[home, explore, organizations, login\].
 - `LFS_START_SERVER`: **false**: Enables git-lfs support.
 - `LFS_CONTENT_PATH`: **./data/lfs**: Where to store LFS files.
 - `LFS_JWT_SECRET`: **\<empty\>**: LFS authentication secret, change this a unique string.

integrations/setting_test.go

@@ -99,5 +99,10 @@ func TestSettingLandingPage(t *testing.T) {
 	resp = MakeRequest(t, req, http.StatusFound)
 	assert.Equal(t, "/explore/organizations", resp.Header().Get("Location"))
 
+	setting.LandingPageURL = setting.LandingPageLogin
+	req = NewRequest(t, "GET", "/")
+	resp = MakeRequest(t, req, http.StatusFound)
+	assert.Equal(t, "/user/login", resp.Header().Get("Location"))
+
 	setting.LandingPageURL = landingPage
 }

modules/setting/setting.go

@@ -54,6 +54,7 @@ const (
 	LandingPageHome          LandingPage = "/"
 	LandingPageExplore       LandingPage = "/explore"
 	LandingPageOrganizations LandingPage = "/explore/organizations"
+	LandingPageLogin         LandingPage = "/user/login"
 )
 
 // enumerates all the types of captchas
@@ -648,6 +649,8 @@ func NewContext() {
 		LandingPageURL = LandingPageExplore
 	case "organizations":
 		LandingPageURL = LandingPageOrganizations
+	case "login":
+		LandingPageURL = LandingPageLogin
 	default:
 		LandingPageURL = LandingPageHome
 	}