don't allow pull requests to be created on an archived repository

Also disable the "PR" button if the repo is archived

Author: adelowo

routers/routes/routes.go

@@ -586,7 +586,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 		m.Group("/milestone", func() {
 			m.Get("/:id", repo.MilestoneIssuesAndPulls)
 		}, reqRepoIssuesOrPullsWriter, context.RepoRef())
-		m.Combo("/compare/*", reqRepoCodeReader, reqRepoPullsReader, repo.MustAllowPulls, repo.SetEditorconfigIfExists).
+		m.Combo("/compare/*", context.RepoMustNotBeArchived(), reqRepoCodeReader, reqRepoPullsReader, repo.MustAllowPulls, repo.SetEditorconfigIfExists).
 			Get(repo.SetDiffViewStyle, repo.CompareAndPullRequest).
 			Post(bindIgnErr(auth.CreateIssueForm{}), repo.CompareAndPullRequestPost)
 

templates/repo/home.tmpl

@@ -57,7 +57,7 @@
 		{{end}}
 		{{template "repo/sub_menu" .}}
 		<div class="ui stackable secondary menu mobile--margin-between-items mobile--no-negative-margins">
-			{{if and .PullRequestCtx.Allowed .IsViewBranch}}
+			{{if and .PullRequestCtx.Allowed .IsViewBranch (not .Repository.IsArchived)}}
 				<div class="fitted item">
 					<a href="{{.BaseRepo.Link}}/compare/{{.BaseRepo.DefaultBranch | EscapePound}}...{{.Repository.Owner.Name}}:{{.BranchName | EscapePound}}">
 						<button class="ui green tiny compact button"><i class="octicon octicon-git-compare"></i></button>