show tags on commits page. refs #1973

src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala

@@ -239,6 +239,10 @@ trait RepositoryViewerControllerBase extends ControllerBase {
 
     using(Git.open(getRepositoryDir(repository.owner, repository.name))) {
       git =>
+        def getTags(sha: String): List[String] = {
+          JGitUtil.getTagsOnCommit(git, sha)
+        }
+
         JGitUtil.getCommitLog(git, branchName, page, 30, path) match {
           case Right((logs, hasNext)) =>
             html.commits(
@@ -252,7 +256,8 @@ trait RepositoryViewerControllerBase extends ControllerBase {
               hasNext,
               hasDeveloperRole(repository.owner, repository.name, context.loginAccount),
               getStatuses,
-              getSummary
+              getSummary,
+              getTags
             )
           case Left(_) => NotFound()
         }

src/main/scala/gitbucket/core/util/JGitUtil.scala

@@ -761,7 +761,27 @@ object JGitUtil {
     }
 
   /**
-   * Returns the list of tags of the specified commit.
+   * Returns the list of tags which pointed on the specified commit.
+   */
+  def getTagsOnCommit(git: Git, commitId: String): List[String] = {
+    git.getRepository.getAllRefsByPeeledObjectId.asScala
+      .get(git.getRepository.resolve(commitId + "^0"))
+      .map {
+        _.asScala
+          .collect {
+            case x if x.getName.startsWith(Constants.R_TAGS) =>
+              x.getName.substring(Constants.R_TAGS.length)
+          }
+          .toList
+          .sorted
+      }
+      .getOrElse {
+        List.empty
+      }
+  }
+
+  /**
+   * Returns the list of tags which contains the specified commit.
    */
   def getTagsOfCommit(git: Git, commitId: String): List[String] =
     using(new RevWalk(git.getRepository)) { revWalk =>

src/main/twirl/gitbucket/core/repo/commits.scala.html

@@ -6,7 +6,8 @@
   hasNext: Boolean,
   hasWritePermission: Boolean,
   getStatuses: String => List[gitbucket.core.model.CommitStatus],
-  getSummary: List[gitbucket.core.model.CommitStatus] => (gitbucket.core.model.CommitState, String))(implicit context: gitbucket.core.controller.Context)
+  getSummary: List[gitbucket.core.model.CommitStatus] => (gitbucket.core.model.CommitState, String),
+  getTags: String => List[String])(implicit context: gitbucket.core.controller.Context)
 @import gitbucket.core.view.helpers
 @gitbucket.core.html.main(s"${repository.owner}/${repository.name}", Some(repository)) {
   @gitbucket.core.html.menu("files", repository){
@@ -39,6 +40,16 @@
           @if(i != 0){ <tr> }
           <td>
             <div class="pull-right text-right">
+              @defining(getTags(commit.id)) { tags =>
+                @if(tags.nonEmpty){
+                  <span class="muted">
+                    <i class="octicon octicon-tag"></i>
+                    @tags.map { tag =>
+                      <a href="@helpers.url(repository)/tree/@tag" class="tag">@tag</a>
+                    }
+                  </span>
+                }
+              }
               <a href="@helpers.url(repository)/commit/@commit.id" class="monospace commit-message strong"><i class="octicon octicon-diff" style="color: black;"></i>@commit.id.substring(0, 7)</a><br>
               <a href="@helpers.url(repository)/tree/@commit.id" class="button-link">Browse files »</a>
             </div>