internal/testgit: Add -S to CommitTree

1 files changed, 8 insertions, 0 deletions

diff --git a/internal/testgit/commit.go b/internal/testgit/commit.go
index b1838e71..78a83e05 100644
--- a/internal/testgit/commit.go
+++ b/internal/testgit/commit.go
@@ -15,6 +15,10 @@ type CommitTreeOptions struct {
 	Committer     Identity
 	AuthorDate    string
 	CommitterDate string
+
+	// Sign requests a signed commit via git commit-tree -S,
+	// using the gpg.format and user.signingkey configured on the repo.
+	Sign bool
 }
 
 // CommitTree creates a commit object from a tree and optional parents,
@@ -34,6 +38,10 @@ func (repo *Repo) CommitTree(
 		args = append(args, "-p", parent.String())
 	}
 
+	if opts.Sign {
+		args = append(args, "-S")
+	}
+
 	args = append(args, "-m", opts.Message, "--end-of-options", tree.String())
 
 	cmd := repo.command(tb, "git", args...)