1 files changed, 37 insertions, 0 deletions
diff --git a/forged/internal/unsorted/git_ref.go b/forged/internal/unsorted/git_ref.go
new file mode 100644
index 0000000..d9735ba
--- /dev/null
+++ b/forged/internal/unsorted/git_ref.go
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+
+package unsorted
+
+import (
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing"
+)
+
+// getRefHash returns the hash of a reference given its
+// type and name as supplied in URL queries.
+func getRefHash(repo *git.Repository, refType, refName string) (refHash plumbing.Hash, err error) {
+	var ref *plumbing.Reference
+	switch refType {
+	case "":
+		if ref, err = repo.Head(); err != nil {
+			return
+		}
+		refHash = ref.Hash()
+	case "commit":
+		refHash = plumbing.NewHash(refName)
+	case "branch":
+		if ref, err = repo.Reference(plumbing.NewBranchReferenceName(refName), true); err != nil {
+			return
+		}
+		refHash = ref.Hash()
+	case "tag":
+		if ref, err = repo.Reference(plumbing.NewTagReferenceName(refName), true); err != nil {
+			return
+		}
+		refHash = ref.Hash()
+	default:
+		panic("Invalid ref type " + refType)
+	}
+	return
+}