Add button to delete undeleted repositories from failed migrations

This PR adds a button to delete failed repositories if there has been a
failure during migration and for whatever reason the repository doesn't
get deleted automatically.

Fix #16154

Signed-off-by: Andrew Thornton <art27@cantab.net>

Author: zeripath

routers/web/repo/view.go

@@ -29,6 +29,7 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/typesniffer"
 )
 
@@ -621,6 +622,7 @@ func Home(ctx *context.Context) {
 			ctx.Data["Repo"] = ctx.Repo
 			ctx.Data["MigrateTask"] = task
 			ctx.Data["CloneAddr"] = safeURL(cfg.CloneAddr)
+			ctx.Data["Failed"] = task.Status == structs.TaskStatusFailed
 			ctx.HTML(http.StatusOK, tplMigrating)
 			return
 		}

templates/repo/migrate/migrating.tmpl

@@ -28,11 +28,50 @@
 								<p>{{.i18n.Tr "repo.migrate.migrating_failed" .CloneAddr | Safe}}</p>
 								<p id="repo_migrating_failed_error"></p>
 							</div>
+							{{if and .Failed .Permission.IsAdmin}}
+								<div class="ui divider"></div>
+								<div class="item">
+									<button class="ui basic red show-modal button" data-modal="#delete-repo-modal">{{.i18n.Tr "repo.settings.delete"}}</button>
+								</div>
+							{{end}}
 						</div>
 					</div>
 				</div>
 			</div>
 		</div>
 	</div>
 </div>
+<div class="ui small modal" id="delete-repo-modal">
+	<div class="header">
+		{{.i18n.Tr "repo.settings.delete"}}
+	</div>
+	<div class="content">
+		<div class="ui warning message text left">
+			{{.i18n.Tr "repo.settings.delete_notices_1" | Safe}}<br>
+			{{.i18n.Tr "repo.settings.delete_notices_2" .Repository.FullName | Safe}}
+			{{if .Repository.NumForks}}<br>
+			{{.i18n.Tr "repo.settings.delete_notices_fork_1"}}
+			{{end}}
+		</div>
+		<form class="ui form" action="{{.Link}}/settings" method="post">
+			{{.CsrfTokenHtml}}
+			<input type="hidden" name="action" value="delete">
+			<div class="field">
+				<label>
+					{{.i18n.Tr "repo.settings.transfer_form_title"}}
+					<span class="text red">{{.Repository.Name}}</span>
+				</label>
+			</div>
+			<div class="required field">
+				<label for="repo_name">{{.i18n.Tr "repo.repo_name"}}</label>
+				<input id="repo_name" name="repo_name" required>
+			</div>
+
+			<div class="text right actions">
+				<div class="ui cancel button">{{.i18n.Tr "settings.cancel"}}</div>
+				<button class="ui red button">{{.i18n.Tr "repo.settings.confirm_delete"}}</button>
+			</div>
+		</form>
+	</div>
+</div>
 {{template "base/footer" .}}