Function cmd_rev_parse

builtin/rev-parse.c:705–1200

}

int cmd_rev_parse(int argc,
		  const char **argv,
		  const char *prefix,
		  struct repository *repo UNUSED)
{
	int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
	const struct git_hash_algo *output_algo = NULL;
	const struct git_hash_algo *compat = NULL;
	int did_repo_setup = 0;
	int has_dashdash = 0;
	int output_prefix = 0;
	struct object_id oid;
	unsigned int flags = 0;
	const char *name = NULL;
	struct strbuf buf = STRBUF_INIT;
	int seen_end_of_options = 0;
	enum format_type format = FORMAT_DEFAULT;

	show_usage_if_asked(argc, argv, builtin_rev_parse_usage);

	if (argc > 1 && !strcmp("--parseopt", argv[1]))
		return cmd_parseopt(argc - 1, argv + 1, prefix);

	if (argc > 1 && !strcmp("--sq-quote", argv[1]))
		return cmd_sq_quote(argc - 2, argv + 2);

	if (argc > 1 && !strcmp("-h", argv[1]))
		usage(builtin_rev_parse_usage);

	for (i = 1; i < argc; i++) {
		if (!strcmp(argv[i], "--")) {
			has_dashdash = 1;
			break;
		}
	}

	/* No options; just report on whether we're in a git repo or not. */
	if (argc == 1) {
		setup_git_directory(the_repository);
		repo_config(the_repository, git_default_config, NULL);
		return 0;
	}

	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];

		if (as_is) {
			if (show_file(arg, output_prefix) && as_is < 2)
				verify_filename(the_repository, prefix, arg, 0);
			continue;
		}

		if (!seen_end_of_options) {
			if (!strcmp(arg, "--local-env-vars")) {
				int i;
				for (i = 0; local_repo_env[i]; i++)
					printf("%s\n", local_repo_env[i]);
				continue;