commit: actually allow yet to be born update_ref

git_commit_create is supposed to update the given reference
"update_ref", but segfaulted in case of a yet to be born
reference. Fix it.

Signed-off-by: schu <schu-github@schulog.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/tests-clar/commit/commit.c b/tests-clar/commit/commit.c
new file mode 100644
index 000000000..1205e5285
--- /dev/null
+++ b/tests-clar/commit/commit.c
@@ -0,0 +1,44 @@
+#include "clar_libgit2.h"
+
+static git_repository *_repo;
+
+void test_commit_commit__initialize(void)
+{
+	cl_fixture_sandbox("testrepo.git");
+	cl_git_pass(git_repository_open(&_repo, "testrepo.git"));
+}
+
+void test_commit_commit__cleanup(void)
+{
+	git_repository_free(_repo);
+	cl_fixture_cleanup("testrepo.git");
+}
+
+void test_commit_commit__create_unexisting_update_ref(void)
+{
+	git_oid oid;
+	git_tree *tree;
+	git_commit *commit;
+	git_signature *s;
+	git_reference *ref;
+
+	git_oid_fromstr(&oid, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750");
+	cl_git_pass(git_commit_lookup(&commit, _repo, &oid));
+
+	git_oid_fromstr(&oid, "944c0f6e4dfa41595e6eb3ceecdb14f50fe18162");
+	cl_git_pass(git_tree_lookup(&tree, _repo, &oid));
+
+	cl_git_pass(git_signature_now(&s, "alice", "alice@example.com"));
+
+	cl_git_fail(git_reference_lookup(&ref, _repo, "refs/heads/foo/bar"));
+	cl_git_pass(git_commit_create(&oid, _repo, "refs/heads/foo/bar", s, s,
+				      NULL, "some msg", tree, 1, (const git_commit **) &commit));
+
+	cl_git_pass(git_reference_lookup(&ref, _repo, "refs/heads/foo/bar"));
+	cl_assert(!git_oid_cmp(&oid, git_reference_oid(ref)));
+
+	git_tree_free(tree);
+	git_commit_free(commit);
+	git_signature_free(s);
+	git_reference_free(ref);
+}