1 files changed, 19 insertions, 0 deletions
diff --git a/pkg/service/git.go b/pkg/service/git.go
index b368f0c..f03ba42 100644
--- a/pkg/service/git.go
+++ b/pkg/service/git.go
@@ -140,6 +140,25 @@ func (g *GitService) WriteTarGZip(w io.Writer, name, ref string, prefix string)
 	return nil
 }
 
+func (g *GitService) Diff(name, ref string) (string, error) {
+	r := g.configRepo.GetByName(name)
+	if r == nil {
+		return "", ErrRepositoryNotFound
+	}
+
+	repo, err := git.OpenRepository(r.Path)
+	if err != nil {
+		return "", err
+	}
+
+	err = repo.SetRef(ref)
+	if err != nil {
+		return "", err
+	}
+
+	return repo.Diff()
+}
+
 func (g *GitService) GetTree(name, ref, path string) (*object.Tree, error) {
 	r := g.configRepo.GetByName(name)
 	if r == nil {