check ctx has dataset status when enter dataesat page

options/locale/locale_en-US.ini

@@ -1411,6 +1411,7 @@ settings.use_external_wiki = Use External Wiki
 settings.external_wiki_url = External Wiki URL
 settings.external_wiki_url_error = The external wiki URL is not a valid URL.
 settings.external_wiki_url_desc = Visitors are redirected to the external wiki URL when clicking the wiki tab.
+settings.dataset_desc= Enable Repository Dataset
 settings.issues_desc = Enable Repository Issue Tracker
 settings.use_internal_issue_tracker = Use Built-In Issue Tracker
 settings.use_external_issue_tracker = Use External Issue Tracker

options/locale/locale_zh-CN.ini

@@ -1411,6 +1411,7 @@ settings.use_external_wiki=使用外部百科
 settings.external_wiki_url=外部 Wiki 链接
 settings.external_wiki_url_error=外部百科链接无效
 settings.external_wiki_url_desc=当点击工单标签时，访问者将被重定向到外部工单系统的URL。
+settings.dataset_desc=启用数据集
 settings.issues_desc=启用工单系统
 settings.use_internal_issue_tracker=使用内置的轻量级工单管理系统
 settings.use_external_issue_tracker=使用外部的工单管理系统

routers/repo/dataset.go

@@ -13,7 +13,17 @@ const (
 	tplIndex base.TplName = "repo/datasets/index"
 )
 
+// MustEnableDataset check if repository enable internal dataset
+func MustEnableDataset(ctx *context.Context) {
+	if !ctx.Repo.CanRead(models.UnitTypeDatasets) {
+		ctx.NotFound("MustEnableDataset", nil)
+		return
+	}
+}
+
 func DatasetIndex(ctx *context.Context) {
+	MustEnableDataset(ctx)
+
 	var orderBy models.SearchOrderBy
 	repo := ctx.Repo.Repository
 	// user := ctx.User