Issue 5924 fix compare button (#5929)

* Revert #5877

This unfortunately was not the solution.

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

* Change permission check to create pull requests to CanReadIssuesOrPulls

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

routers/api/v1/repo/pull.go

@@ -668,8 +668,8 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
-	if !perm.CanWrite(models.UnitTypeCode) {
+	if !perm.CanReadIssuesOrPulls(true) {
-		log.Trace("ParseCompareInfo[%d]: does not have write access or site admin", baseRepo.ID)
+		log.Trace("ParseCompareInfo[%d]: cannot create/read pull requests", baseRepo.ID)
 		ctx.Status(404)
 		return nil, nil, nil, nil, "", ""
 	}

routers/repo/pull.go

@@ -684,8 +684,8 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
-	if !perm.CanWrite(models.UnitTypeCode) {
+	if !perm.CanReadIssuesOrPulls(true) {
-		log.Trace("ParseCompareInfo[%d]: does not have write access or site admin", baseRepo.ID)
+		log.Trace("ParseCompareInfo[%d]: cannot create/read pull requests", baseRepo.ID)
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}

templates/repo/home.tmpl

@@ -59,7 +59,7 @@
 		<div class="ui stackable secondary menu mobile--margin-between-items mobile--no-negative-margins">
 			{{if and .PullRequestCtx.Allowed .IsViewBranch (not .Repository.IsArchived)}}
 				<div class="fitted item">
-					<a href="{{.BaseRepo.Link}}/compare/{{.BaseRepo.DefaultBranch | EscapePound}}...{{ if .Repository.IsFork }}{{.Repository.Owner.Name}}{{ else }}{{ .SignedUserName }}{{ end }}:{{.BranchName | EscapePound}}">
+					<a href="{{.BaseRepo.Link}}/compare/{{.BaseRepo.DefaultBranch | EscapePound}}...{{if ne .Repository.Owner.Name .BaseRepo.Owner.Name}}{{.Repository.Owner.Name}}:{{end}}{{.BranchName | EscapePound}}">
 					<button class="ui green tiny compact button"><i class="octicon octicon-git-compare"></i></button>
 					</a>
 				</div>