Show parents in commit diff page

routers/repo/commit.go

@@ -91,10 +91,22 @@ func Diff(ctx *middleware.Context, params martini.Params) {
 		return isImage
 	}
 
+	parents := make([]string, commit.ParentCount())
+	for i := 0; i < commit.ParentCount(); i++ {
+		sha, err := commit.ParentId(i)
+		parents[i] = sha.String()
+		if err != nil {
+			ctx.Handle(404, "repo.Diff", err)
+		}
+	}
+
+	ctx.Data["Username"] = userName
+	ctx.Data["Reponame"] = repoName
 	ctx.Data["IsImageFile"] = isImageFile
 	ctx.Data["Title"] = commit.Summary() + " · " + base.ShortSha(commitId)
 	ctx.Data["Commit"] = commit
 	ctx.Data["Diff"] = diff
+	ctx.Data["Parents"] = parents
 	ctx.Data["DiffNotAvailable"] = diff.NumFiles() == 0
 	ctx.Data["IsRepoToolbarCommits"] = true
 	ctx.Data["SourcePath"] = "/" + path.Join(userName, repoName, "src", commitId)

templates/repo/diff.tmpl

@@ -8,9 +8,16 @@
                 <a class="pull-right btn btn-primary btn-sm" rel="nofollow" href="{{.SourcePath}}">Browse Source</a>
                 <h4>{{.Commit.Message}}</h4>
             </div>
+            {{ $username := .Username }}
+            {{ $reponame := .Reponame }}
             <div class="panel-body">
                 <span class="pull-right">
-                    commit <span class="label label-default sha">{{ShortSha .CommitId}}</span>
+                <ul class="list-unstyled">
+                    {{range .Parents}}
+                    <li>parent <a href="/{{$username}}/{{$reponame}}/commit/{{.}}"><span class="label label-default sha">{{ShortSha .}}</span></a></li>
+                    {{end}}
+                    <li>commit <span class="label label-default sha">{{ShortSha .CommitId}}</span></li>
+                </ul>
                 </span>
                 <p class="author">
                     <img class="avatar" src="{{AvatarLink .Commit.Author.Email}}" alt=""/>