object/commit: Clone

1 files changed, 33 insertions, 0 deletions

diff --git a/object/commit/clone.go b/object/commit/clone.go
new file mode 100644
index 00000000..08987f26
--- /dev/null
+++ b/object/commit/clone.go
@@ -0,0 +1,33 @@
+package commit
+
+import (
+	"bytes"
+	"slices"
+)
+
+// Clone returns a deep copy of the commit
+// whose byte fields are independent of any memory the original may alias.
+//
+// Labels: Life-Independent.
+func (commit *Commit) Clone() *Commit {
+	clone := &Commit{
+		Tree:      commit.Tree,
+		Parents:   slices.Clone(commit.Parents),
+		Author:    commit.Author.Clone(),
+		Committer: commit.Committer.Clone(),
+		Message:   bytes.Clone(commit.Message),
+		ChangeID:  bytes.Clone(commit.ChangeID),
+	}
+
+	if commit.ExtraHeaders != nil {
+		clone.ExtraHeaders = make([]ExtraHeader, len(commit.ExtraHeaders))
+		for i, h := range commit.ExtraHeaders {
+			clone.ExtraHeaders[i] = ExtraHeader{
+				Key:   bytes.Clone(h.Key),
+				Value: bytes.Clone(h.Value),
+			}
+		}
+	}
+
+	return clone
+}