Fix #515

modules/git/repo_commit.go

@@ -40,11 +40,11 @@ func (repo *Repository) GetCommitIdOfTag(tagName string) (string, error) {
 }
 
 func (repo *Repository) GetCommitOfTag(tagName string) (*Commit, error) {
-	commitId, err := repo.GetCommitIdOfTag(tagName)
+	tag, err := repo.GetTag(tagName)
 	if err != nil {
 		return nil, err
 	}
-	return repo.GetCommit(commitId)
+	return tag.Commit()
 }
 
 // Parse commit information from the (uncompressed) raw

modules/git/repo_tag.go

@@ -52,6 +52,7 @@ func (repo *Repository) getTag(id sha1) (*Tag, error) {
 	if err != nil {
 		return nil, errors.New(stderr)
 	}
+	tp = strings.TrimSpace(tp)
 
 	// Tag is a commit.
 	if ObjectType(tp) == COMMIT {
@@ -77,7 +78,6 @@ func (repo *Repository) getTag(id sha1) (*Tag, error) {
 	}
 
 	tag.Id = id
-	tag.Object = id
 	tag.repo = repo
 
 	repo.tagCache[id] = tag

modules/git/tree.go

@@ -109,9 +109,12 @@ func (t *Tree) ListEntries(relpath string) (Entries, error) {
 	}
 	t.entriesParsed = true
 
-	stdout, _, err := com.ExecCmdDirBytes(t.repo.Path,
+	stdout, stderr, err := com.ExecCmdDirBytes(t.repo.Path,
 		"git", "ls-tree", t.Id.String())
 	if err != nil {
+		if strings.Contains(err.Error(), "exit status 128") {
+			return nil, errors.New(strings.TrimSpace(string(stderr)))
+		}
 		return nil, err
 	}
 	t.entries, err = parseTreeData(t, stdout)