RefactorHEADmaster

1 files changed, 113 insertions, 0 deletions

diff --git a/git2d/cmd_ref.c b/git2d/cmd_ref.c
new file mode 100644
index 0000000..f4bae4a
--- /dev/null
+++ b/git2d/cmd_ref.c
@@ -0,0 +1,113 @@
+/*-
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+ */
+
+#include "x.h"
+
+static int write_oid(struct bare_writer *writer, const git_oid *oid)
+{
+	return bare_put_data(writer, oid->id, GIT_OID_RAWSZ) == BARE_ERROR_NONE ? 0 : -1;
+}
+
+int cmd_resolve_ref(git_repository *repo, struct bare_reader *reader, struct bare_writer *writer)
+{
+	char type[32] = { 0 };
+	char name[4096] = { 0 };
+	if (bare_get_data(reader, (uint8_t *) type, sizeof(type) - 1) != BARE_ERROR_NONE) {
+		bare_put_uint(writer, 11);
+		return -1;
+	}
+	if (bare_get_data(reader, (uint8_t *) name, sizeof(name) - 1) != BARE_ERROR_NONE) {
+		bare_put_uint(writer, 11);
+		return -1;
+	}
+
+	git_oid oid = { 0 };
+	int err = 0;
+
+	if (type[0] == '\0') {
+		git_object *obj = NULL;
+		err = git_revparse_single(&obj, repo, "HEAD^{commit}");
+		if (err != 0) {
+			bare_put_uint(writer, 12);
+			return -1;
+		}
+		git_commit *c = (git_commit *) obj;
+		git_oid_cpy(&oid, git_commit_id(c));
+		git_commit_free(c);
+	} else if (strcmp(type, "commit") == 0) {
+		err = git_oid_fromstr(&oid, name);
+		if (err != 0) {
+			bare_put_uint(writer, 12);
+			return -1;
+		}
+	} else if (strcmp(type, "branch") == 0) {
+		char fullref[4608];
+		snprintf(fullref, sizeof(fullref), "refs/heads/%s", name);
+		git_object *obj = NULL;
+		err = git_revparse_single(&obj, repo, fullref);
+		if (err != 0) {
+			bare_put_uint(writer, 12);
+			return -1;
+		}
+		git_commit *c = (git_commit *) obj;
+		git_oid_cpy(&oid, git_commit_id(c));
+		git_commit_free(c);
+	} else if (strcmp(type, "tag") == 0) {
+		char spec[4608];
+		snprintf(spec, sizeof(spec), "refs/tags/%s^{commit}", name);
+		git_object *obj = NULL;
+		err = git_revparse_single(&obj, repo, spec);
+		if (err != 0) {
+			bare_put_uint(writer, 12);
+			return -1;
+		}
+		git_commit *c = (git_commit *) obj;
+		git_oid_cpy(&oid, git_commit_id(c));
+		git_commit_free(c);
+	} else {
+		bare_put_uint(writer, 12);
+		return -1;
+	}
+
+	bare_put_uint(writer, 0);
+	return write_oid(writer, &oid);
+}
+
+int cmd_list_branches(git_repository *repo, struct bare_writer *writer)
+{
+	git_branch_iterator *it = NULL;
+	int err = git_branch_iterator_new(&it, repo, GIT_BRANCH_LOCAL);
+	if (err != 0) {
+		bare_put_uint(writer, 13);
+		return -1;
+	}
+	size_t count = 0;
+	git_reference *ref;
+	git_branch_t type;
+	while (git_branch_next(&ref, &type, it) == 0) {
+		count++;
+		git_reference_free(ref);
+	}
+	git_branch_iterator_free(it);
+
+	err = git_branch_iterator_new(&it, repo, GIT_BRANCH_LOCAL);
+	if (err != 0) {
+		bare_put_uint(writer, 13);
+		return -1;
+	}
+
+	bare_put_uint(writer, 0);
+	bare_put_uint(writer, count);
+	while (git_branch_next(&ref, &type, it) == 0) {
+		const char *name = NULL;
+		git_branch_name(&name, ref);
+		if (name == NULL)
+			name = "";
+		bare_put_data(writer, (const uint8_t *)name, strlen(name));
+		git_reference_free(ref);
+	}
+	git_branch_iterator_free(it);
+	return 0;
+}