refdb: look for reflog in commondir

src/refdb_fs.c

@@ -1582,7 +1582,7 @@ static int create_new_reflog_file(const char *filepath)
 
 GIT_INLINE(int) retrieve_reflog_path(git_buf *path, git_repository *repo, const char *name)
 {
-	return git_buf_join3(path, '/', repo->path_repository, GIT_REFLOG_DIR, name);
+	return git_buf_join3(path, '/', repo->commondir, GIT_REFLOG_DIR, name);
 }
 
 static int refdb_reflog_fs__ensure_log(git_refdb_backend *_backend, const char *name)

tests/worktree/reflog.c

+#include "clar_libgit2.h"
+#include "worktree_helpers.h"
+
+#include "reflog.h"
+
+#define COMMON_REPO "testrepo"
+#define WORKTREE_REPO "testrepo-worktree"
+
+#define REFLOG "refs/heads/testrepo-worktree"
+#define REFLOG_MESSAGE "reflog message"
+
+static worktree_fixture fixture =
+	WORKTREE_FIXTURE_INIT(COMMON_REPO, WORKTREE_REPO);
+
+void test_worktree_reflog__initialize(void)
+{
+	setup_fixture_worktree(&fixture);
+}
+
+void test_worktree_reflog__cleanup(void)
+{
+	cleanup_fixture_worktree(&fixture);
+}
+
+void test_worktree_reflog__read(void)
+{
+	git_reflog *reflog;
+	const git_reflog_entry *entry;
+
+	cl_git_pass(git_reflog_read(&reflog, fixture.worktree, REFLOG));
+	cl_assert_equal_i(git_reflog_entrycount(reflog), 1);
+
+	entry = git_reflog_entry_byindex(reflog, 0);
+	cl_assert(entry != NULL);
+	cl_assert_equal_s(git_reflog_entry_message(entry), "branch: Created from HEAD");
+
+	git_reflog_free(reflog);
+}
+
+void test_worktree_reflog__append_then_read(void)
+{
+	git_reflog *reflog, *parent_reflog;
+	const git_reflog_entry *entry;
+	git_reference *head;
+	git_signature *sig;
+	const git_oid *oid;
+
+	cl_git_pass(git_repository_head(&head, fixture.worktree));
+	cl_assert((oid = git_reference_target(head)) != NULL);
+	cl_git_pass(git_signature_now(&sig, "foo", "foo@bar"));
+
+	cl_git_pass(git_reflog_read(&reflog, fixture.worktree, REFLOG));
+	cl_git_pass(git_reflog_append(reflog, oid, sig, REFLOG_MESSAGE));
+	git_reflog_write(reflog);
+
+	cl_git_pass(git_reflog_read(&parent_reflog, fixture.repo, REFLOG));
+	entry = git_reflog_entry_byindex(parent_reflog, 0);
+	cl_assert(git_oid_cmp(oid, &entry->oid_old) == 0);
+	cl_assert(git_oid_cmp(oid, &entry->oid_cur) == 0);
+
+	git_reference_free(head);
+	git_signature_free(sig);
+	git_reflog_free(reflog);
+	git_reflog_free(parent_reflog);
+}