1 files changed, 47 insertions, 0 deletions
diff --git a/cmd/gitaly-git2go/git2goutil/commit.go b/cmd/gitaly-git2go/git2goutil/commit.go
new file mode 100644
index 000000000..7f45640ad
--- /dev/null
+++ b/cmd/gitaly-git2go/git2goutil/commit.go
@@ -0,0 +1,47 @@
+package git2goutil
+
+import (
+	"fmt"
+
+	git "github.com/libgit2/git2go/v33"
+)
+
+// CommitSubmitter is the helper struct to make signed Commits conveniently.
+type CommitSubmitter struct {
+	Repo           *git.Repository
+	SigningKeyPath string
+}
+
+// NewCommitSubmitter creates a new CommitSubmitter.
+func NewCommitSubmitter(repo *git.Repository, signingKeyPath string) *CommitSubmitter {
+	return &CommitSubmitter{
+		Repo:           repo,
+		SigningKeyPath: signingKeyPath,
+	}
+}
+
+// Commit commits a commit with or without OpenPGP signature depends on SigningKeyPath value.
+func (cs *CommitSubmitter) Commit(
+	author, committer *git.Signature,
+	messageEncoding git.MessageEncoding,
+	message string,
+	tree *git.Tree,
+	parents ...*git.Commit,
+) (*git.Oid, error) {
+	commitBytes, err := cs.Repo.CreateCommitBuffer(author, committer, messageEncoding, message, tree, parents...)
+	if err != nil {
+		return nil, err
+	}
+
+	signature, err := CreateCommitSignature(cs.SigningKeyPath, string(commitBytes))
+	if err != nil {
+		return nil, fmt.Errorf("create commit signature: %w", err)
+	}
+
+	commitID, err := cs.Repo.CreateCommitWithSignature(string(commitBytes), signature, "")
+	if err != nil {
+		return nil, err
+	}
+
+	return commitID, nil
+}