1 files changed, 21 insertions, 0 deletions
diff --git a/modules/git/repo_commit_gogit.go b/modules/git/repo_commit_gogit.go
index 48b0cfe19d..2f9b1c4206 100644
--- a/modules/git/repo_commit_gogit.go
+++ b/modules/git/repo_commit_gogit.go
@@ -30,6 +30,27 @@ func (repo *Repository) GetRefCommitID(name string) (string, error) {
 	return ref.Hash().String(), nil
 }
 
+// ConvertToSHA1 returns a Hash object from a potential ID string
+func (repo *Repository) ConvertToSHA1(commitID string) (SHA1, error) {
+	if len(commitID) == 40 {
+		sha1, err := NewIDFromString(commitID)
+		if err == nil {
+			return sha1, nil
+		}
+	}
+
+	actualCommitID, err := NewCommand("rev-parse", "--verify", commitID).RunInDir(repo.Path)
+	if err != nil {
+		if strings.Contains(err.Error(), "unknown revision or path") ||
+			strings.Contains(err.Error(), "fatal: Needed a single revision") {
+			return SHA1{}, ErrNotExist{commitID, ""}
+		}
+		return SHA1{}, err
+	}
+
+	return NewIDFromString(actualCommitID)
+}
+
 // IsCommitExist returns true if given commit exists in current repository.
 func (repo *Repository) IsCommitExist(name string) bool {
 	hash := plumbing.NewHash(name)