object/tree: Clone

1 files changed, 24 insertions, 0 deletions

diff --git a/object/tree/clone.go b/object/tree/clone.go
new file mode 100644
index 00000000..d00c62f2
--- /dev/null
+++ b/object/tree/clone.go
@@ -0,0 +1,24 @@
+package tree
+
+import "bytes"
+
+// Clone returns a deep copy of the tree
+// whose entry names are independent of any memory the original may alias.
+//
+// Labels: Life-Independent.
+func (tree *Tree) Clone() *Tree {
+	if tree.entries == nil {
+		return &Tree{}
+	}
+
+	clone := &Tree{entries: make([]Entry, len(tree.entries))}
+	for i, entry := range tree.entries {
+		clone.entries[i] = Entry{
+			Mode: entry.Mode,
+			Name: bytes.Clone(entry.Name),
+			ID:   entry.ID,
+		}
+	}
+
+	return clone
+}