[thirdparty/git.git] / builtin / rev-parse.c

/*
 * rev-parse.c
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include "cache.h"
#include "commit.h"
#include "refs.h"
#include "quote.h"
#include "builtin.h"
#include "parse-options.h"

#define DO_REVS		1
#define DO_NOREV	2
#define DO_FLAGS	4
#define DO_NONFLAGS	8
static int filter = ~0;

static const char *def;

#define NORMAL 0
#define REVERSED 1
static int show_type = NORMAL;

#define SHOW_SYMBOLIC_ASIS 1
#define SHOW_SYMBOLIC_FULL 2
static int symbolic;
static int abbrev;
static int abbrev_ref;
static int abbrev_ref_strict;
static int output_sq;

/*
 * Some arguments are relevant "revision" arguments,
 * others are about output format or other details.
 * This sorts it all out.
 */
static int is_rev_argument(const char *arg)
{
	static const char *rev_args[] = {
		"--all",
		"--bisect",
		"--dense",
		"--branches=",
		"--branches",
		"--header",
		"--ignore-missing",
		"--max-age=",
		"--max-count=",
		"--min-age=",
		"--no-merges",
		"--min-parents=",
		"--no-min-parents",
		"--max-parents=",
		"--no-max-parents",
		"--objects",
		"--objects-edge",
		"--parents",
		"--pretty",
		"--remotes=",
		"--remotes",
		"--glob=",
		"--sparse",
		"--tags=",
		"--tags",
		"--topo-order",
		"--date-order",
		"--unpacked",
		NULL
	};
	const char **p = rev_args;

	/* accept -<digit>, like traditional "head" */
	if ((*arg == '-') && isdigit(arg[1]))
		return 1;

	for (;;) {
		const char *str = *p++;
		int len;
		if (!str)
			return 0;
		len = strlen(str);
		if (!strcmp(arg, str) ||
		    (str[len-1] == '=' && !strncmp(arg, str, len)))
			return 1;
	}
}

/* Output argument as a string, either SQ or normal */
static void show(const char *arg)
{
	if (output_sq) {
		int sq = '\'', ch;

		putchar(sq);
		while ((ch = *arg++)) {
			if (ch == sq)
				fputs("'\\'", stdout);
			putchar(ch);
		}
		putchar(sq);
		putchar(' ');
	}
	else
		puts(arg);
}

/* Like show(), but with a negation prefix according to type */
static void show_with_type(int type, const char *arg)
{
	if (type != show_type)
		putchar('^');
	show(arg);
}

/* Output a revision, only if filter allows it */
static void show_rev(int type, const unsigned char *sha1, const char *name)
{
	if (!(filter & DO_REVS))
		return;
	def = NULL;

	if ((symbolic || abbrev_ref) && name) {
		if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
			unsigned char discard[20];
			char *full;

			switch (dwim_ref(name, strlen(name), discard, &full)) {
			case 0:
				/*
				 * Not found -- not a ref.  We could
				 * emit "name" here, but symbolic-full
				 * users are interested in finding the
				 * refs spelled in full, and they would
				 * need to filter non-refs if we did so.
				 */
				break;
			case 1: /* happy */
				if (abbrev_ref)
					full = shorten_unambiguous_ref(full,
						abbrev_ref_strict);
				show_with_type(type, full);
				break;
			default: /* ambiguous */
				error("refname '%s' is ambiguous", name);
				break;
			}
		} else {
			show_with_type(type, name);
		}
	}
	else if (abbrev)
		show_with_type(type, find_unique_abbrev(sha1, abbrev));
	else
		show_with_type(type, sha1_to_hex(sha1));
}

/* Output a flag, only if filter allows it. */
static int show_flag(const char *arg)
{
	if (!(filter & DO_FLAGS))
		return 0;
	if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
		show(arg);
		return 1;
	}
	return 0;
}

static int show_default(void)
{
	const char *s = def;

	if (s) {
		unsigned char sha1[20];

		def = NULL;
		if (!get_sha1(s, sha1)) {
			show_rev(NORMAL, sha1, s);
			return 1;
		}
	}
	return 0;
}

static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
{
	show_rev(NORMAL, sha1, refname);
	return 0;
}

static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
{
	show_rev(REVERSED, sha1, refname);
	return 0;
}

static int show_abbrev(const unsigned char *sha1, void *cb_data)
{
	show_rev(NORMAL, sha1, NULL);
	return 0;
}

static void show_datestring(const char *flag, const char *datestr)
{
	static char buffer[100];

	/* date handling requires both flags and revs */
	if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
		return;
	snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
	show(buffer);
}

static int show_file(const char *arg)
{
	show_default();
	if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
		show(arg);
		return 1;
	}
	return 0;
}

static int try_difference(const char *arg)
{
	char *dotdot;
	unsigned char sha1[20];
	unsigned char end[20];
	const char *next;
	const char *this;
	int symmetric;

	if (!(dotdot = strstr(arg, "..")))
		return 0;
	next = dotdot + 2;
	this = arg;
	symmetric = (*next == '.');

	*dotdot = 0;
	next += symmetric;

	if (!*next)
		next = "HEAD";
	if (dotdot == arg)
		this = "HEAD";
	if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
		show_rev(NORMAL, end, next);
		show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
		if (symmetric) {
			struct commit_list *exclude;
			struct commit *a, *b;
			a = lookup_commit_reference(sha1);
			b = lookup_commit_reference(end);
			exclude = get_merge_bases(a, b, 1);
			while (exclude) {
				struct commit_list *n = exclude->next;
				show_rev(REVERSED,
					 exclude->item->object.sha1,NULL);
				free(exclude);
				exclude = n;
			}
		}
		return 1;
	}
	*dotdot = '.';
	return 0;
}

static int try_parent_shorthands(const char *arg)
{
	char *dotdot;
	unsigned char sha1[20];
	struct commit *commit;
	struct commit_list *parents;
	int parents_only;

	if ((dotdot = strstr(arg, "^!")))
		parents_only = 0;
	else if ((dotdot = strstr(arg, "^@")))
		parents_only = 1;

	if (!dotdot || dotdot[2])
		return 0;

	*dotdot = 0;
	if (get_sha1_committish(arg, sha1))
		return 0;

	if (!parents_only)
		show_rev(NORMAL, sha1, arg);
	commit = lookup_commit_reference(sha1);
	for (parents = commit->parents; parents; parents = parents->next)
		show_rev(parents_only ? NORMAL : REVERSED,
				parents->item->object.sha1, arg);

	return 1;
}

static int parseopt_dump(const struct option *o, const char *arg, int unset)
{
	struct strbuf *parsed = o->value;
	if (unset)
		strbuf_addf(parsed, " --no-%s", o->long_name);
	else if (o->short_name)
		strbuf_addf(parsed, " -%c", o->short_name);
	else
		strbuf_addf(parsed, " --%s", o->long_name);
	if (arg) {
		strbuf_addch(parsed, ' ');
		sq_quote_buf(parsed, arg);
	}
	return 0;
}

static const char *skipspaces(const char *s)
{
	while (isspace(*s))
		s++;
	return s;
}

static int cmd_parseopt(int argc, const char **argv, const char *prefix)
{
	static int keep_dashdash = 0, stop_at_non_option = 0;
	static char const * const parseopt_usage[] = {
		"git rev-parse --parseopt [options] -- [<args>...]",
		NULL
	};
	static struct option parseopt_opts[] = {
		OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
					"keep the `--` passed as an arg"),
		OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option,
					"stop parsing after the "
					"first non-option argument"),
		OPT_END(),
	};

	struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
	const char **usage = NULL;
	struct option *opts = NULL;
	int onb = 0, osz = 0, unb = 0, usz = 0;

	strbuf_addstr(&parsed, "set --");
	argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
	                     PARSE_OPT_KEEP_DASHDASH);
	if (argc < 1 || strcmp(argv[0], "--"))
		usage_with_options(parseopt_usage, parseopt_opts);

	/* get the usage up to the first line with a -- on it */
	for (;;) {
		if (strbuf_getline(&sb, stdin, '\n') == EOF)
			die("premature end of input");
		ALLOC_GROW(usage, unb + 1, usz);
		if (!strcmp("--", sb.buf)) {
			if (unb < 1)
				die("no usage string given before the `--' separator");
			usage[unb] = NULL;
			break;
		}
		usage[unb++] = strbuf_detach(&sb, NULL);
	}

	/* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
	while (strbuf_getline(&sb, stdin, '\n') != EOF) {
		const char *s;
		struct option *o;

		if (!sb.len)
			continue;

		ALLOC_GROW(opts, onb + 1, osz);
		memset(opts + onb, 0, sizeof(opts[onb]));

		o = &opts[onb++];
		s = strchr(sb.buf, ' ');
		if (!s || *sb.buf == ' ') {
			o->type = OPTION_GROUP;
			o->help = xstrdup(skipspaces(sb.buf));
			continue;
		}

		o->type = OPTION_CALLBACK;
		o->help = xstrdup(skipspaces(s));
		o->value = &parsed;
		o->flags = PARSE_OPT_NOARG;
		o->callback = &parseopt_dump;
		while (s > sb.buf && strchr("*=?!", s[-1])) {
			switch (*--s) {
			case '=':
				o->flags &= ~PARSE_OPT_NOARG;
				break;
			case '?':
				o->flags &= ~PARSE_OPT_NOARG;
				o->flags |= PARSE_OPT_OPTARG;
				break;
			case '!':
				o->flags |= PARSE_OPT_NONEG;
				break;
			case '*':
				o->flags |= PARSE_OPT_HIDDEN;
				break;
			}
		}

		if (s - sb.buf == 1) /* short option only */
			o->short_name = *sb.buf;
		else if (sb.buf[1] != ',') /* long option only */
			o->long_name = xmemdupz(sb.buf, s - sb.buf);
		else {
			o->short_name = *sb.buf;
			o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
		}
	}
	strbuf_release(&sb);

	/* put an OPT_END() */
	ALLOC_GROW(opts, onb + 1, osz);
	memset(opts + onb, 0, sizeof(opts[onb]));
	argc = parse_options(argc, argv, prefix, opts, usage,
			(keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
			(stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
			PARSE_OPT_SHELL_EVAL);

	strbuf_addf(&parsed, " --");
	sq_quote_argv(&parsed, argv, 0);
	puts(parsed.buf);
	return 0;
}

static int cmd_sq_quote(int argc, const char **argv)
{
	struct strbuf buf = STRBUF_INIT;

	if (argc)
		sq_quote_argv(&buf, argv, 0);
	printf("%s\n", buf.buf);
	strbuf_release(&buf);

	return 0;
}

static void die_no_single_rev(int quiet)
{
	if (quiet)
		exit(1);
	else
		die("Needed a single revision");
}

static const char builtin_rev_parse_usage[] =
"git rev-parse --parseopt [options] -- [<args>...]\n"
"   or: git rev-parse --sq-quote [<arg>...]\n"
"   or: git rev-parse [options] [<arg>...]\n"
"\n"
"Run \"git rev-parse --parseopt -h\" for more information on the first usage.";

int cmd_rev_parse(int argc, const char **argv, const char *prefix)
{
	int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
	unsigned char sha1[20];
	const char *name = NULL;

	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 == 2 && !strcmp("--local-env-vars", argv[1])) {
		int i;
		for (i = 0; local_repo_env[i]; i++)
			printf("%s\n", local_repo_env[i]);
		return 0;
	}

	if (argc > 2 && !strcmp(argv[1], "--resolve-git-dir")) {
		const char *gitdir = resolve_gitdir(argv[2]);
		if (!gitdir)
			die("not a gitdir '%s'", argv[2]);
		puts(gitdir);
		return 0;
	}

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

	prefix = setup_git_directory();
	git_config(git_default_config, NULL);
	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];

		if (as_is) {
			if (show_file(arg) && as_is < 2)
				verify_filename(prefix, arg, 0);
			continue;
		}
		if (!strcmp(arg,"-n")) {
			if (++i >= argc)
				die("-n requires an argument");
			if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
				show(arg);
				show(argv[i]);
			}
			continue;
		}
		if (!prefixcmp(arg, "-n")) {
			if ((filter & DO_FLAGS) && (filter & DO_REVS))
				show(arg);
			continue;
		}

		if (*arg == '-') {
			if (!strcmp(arg, "--")) {
				as_is = 2;
				/* Pass on the "--" if we show anything but files.. */
				if (filter & (DO_FLAGS | DO_REVS))
					show_file(arg);
				continue;
			}
			if (!strcmp(arg, "--default")) {
				def = argv[i+1];
				i++;
				continue;
			}
			if (!strcmp(arg, "--revs-only")) {
				filter &= ~DO_NOREV;
				continue;
			}
			if (!strcmp(arg, "--no-revs")) {
				filter &= ~DO_REVS;
				continue;
			}
			if (!strcmp(arg, "--flags")) {
				filter &= ~DO_NONFLAGS;
				continue;
			}
			if (!strcmp(arg, "--no-flags")) {
				filter &= ~DO_FLAGS;
				continue;
			}
			if (!strcmp(arg, "--verify")) {
				filter &= ~(DO_FLAGS|DO_NOREV);
				verify = 1;
				continue;
			}
			if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
				quiet = 1;
				continue;
			}
			if (!strcmp(arg, "--short") ||
			    !prefixcmp(arg, "--short=")) {
				filter &= ~(DO_FLAGS|DO_NOREV);
				verify = 1;
				abbrev = DEFAULT_ABBREV;
				if (arg[7] == '=')
					abbrev = strtoul(arg + 8, NULL, 10);
				if (abbrev < MINIMUM_ABBREV)
					abbrev = MINIMUM_ABBREV;
				else if (40 <= abbrev)
					abbrev = 40;
				continue;
			}
			if (!strcmp(arg, "--sq")) {
				output_sq = 1;
				continue;
			}
			if (!strcmp(arg, "--not")) {
				show_type ^= REVERSED;
				continue;
			}
			if (!strcmp(arg, "--symbolic")) {
				symbolic = SHOW_SYMBOLIC_ASIS;
				continue;
			}
			if (!strcmp(arg, "--symbolic-full-name")) {
				symbolic = SHOW_SYMBOLIC_FULL;
				continue;
			}
			if (!prefixcmp(arg, "--abbrev-ref") &&
			    (!arg[12] || arg[12] == '=')) {
				abbrev_ref = 1;
				abbrev_ref_strict = warn_ambiguous_refs;
				if (arg[12] == '=') {
					if (!strcmp(arg + 13, "strict"))
						abbrev_ref_strict = 1;
					else if (!strcmp(arg + 13, "loose"))
						abbrev_ref_strict = 0;
					else
						die("unknown mode for %s", arg);
				}
				continue;
			}
			if (!strcmp(arg, "--all")) {
				for_each_ref(show_reference, NULL);
				continue;
			}
			if (!prefixcmp(arg, "--disambiguate=")) {
				for_each_abbrev(arg + 15, show_abbrev, NULL);
				continue;
			}
			if (!strcmp(arg, "--bisect")) {
				for_each_ref_in("refs/bisect/bad", show_reference, NULL);
				for_each_ref_in("refs/bisect/good", anti_reference, NULL);
				continue;
			}
			if (!prefixcmp(arg, "--branches=")) {
				for_each_glob_ref_in(show_reference, arg + 11,
					"refs/heads/", NULL);
				continue;
			}
			if (!strcmp(arg, "--branches")) {
				for_each_branch_ref(show_reference, NULL);
				continue;
			}
			if (!prefixcmp(arg, "--tags=")) {
				for_each_glob_ref_in(show_reference, arg + 7,
					"refs/tags/", NULL);
				continue;
			}
			if (!strcmp(arg, "--tags")) {
				for_each_tag_ref(show_reference, NULL);
				continue;
			}
			if (!prefixcmp(arg, "--glob=")) {
				for_each_glob_ref(show_reference, arg + 7, NULL);
				continue;
			}
			if (!prefixcmp(arg, "--remotes=")) {
				for_each_glob_ref_in(show_reference, arg + 10,
					"refs/remotes/", NULL);
				continue;
			}
			if (!strcmp(arg, "--remotes")) {
				for_each_remote_ref(show_reference, NULL);
				continue;
			}
			if (!strcmp(arg, "--show-toplevel")) {
				const char *work_tree = get_git_work_tree();
				if (work_tree)
					puts(work_tree);
				continue;
			}
			if (!strcmp(arg, "--show-prefix")) {
				if (prefix)
					puts(prefix);
				else
					putchar('\n');
				continue;
			}
			if (!strcmp(arg, "--show-cdup")) {
				const char *pfx = prefix;
				if (!is_inside_work_tree()) {
					const char *work_tree =
						get_git_work_tree();
					if (work_tree)
						printf("%s\n", work_tree);
					continue;
				}
				while (pfx) {
					pfx = strchr(pfx, '/');
					if (pfx) {
						pfx++;
						printf("../");
					}
				}
				putchar('\n');
				continue;
			}
			if (!strcmp(arg, "--git-dir")) {
				const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
				static char cwd[PATH_MAX];
				int len;
				if (gitdir) {
					puts(gitdir);
					continue;
				}
				if (!prefix) {
					puts(".git");
					continue;
				}
				if (!getcwd(cwd, PATH_MAX))
					die_errno("unable to get current working directory");
				len = strlen(cwd);
				printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
				continue;
			}
			if (!strcmp(arg, "--is-inside-git-dir")) {
				printf("%s\n", is_inside_git_dir() ? "true"
						: "false");
				continue;
			}
			if (!strcmp(arg, "--is-inside-work-tree")) {
				printf("%s\n", is_inside_work_tree() ? "true"
						: "false");
				continue;
			}
			if (!strcmp(arg, "--is-bare-repository")) {
				printf("%s\n", is_bare_repository() ? "true"
						: "false");
				continue;
			}
			if (!prefixcmp(arg, "--since=")) {
				show_datestring("--max-age=", arg+8);
				continue;
			}
			if (!prefixcmp(arg, "--after=")) {
				show_datestring("--max-age=", arg+8);
				continue;
			}
			if (!prefixcmp(arg, "--before=")) {
				show_datestring("--min-age=", arg+9);
				continue;
			}
			if (!prefixcmp(arg, "--until=")) {
				show_datestring("--min-age=", arg+8);
				continue;
			}
			if (show_flag(arg) && verify)
				die_no_single_rev(quiet);
			continue;
		}

		/* Not a flag argument */
		if (try_difference(arg))
			continue;
		if (try_parent_shorthands(arg))
			continue;
		name = arg;
		type = NORMAL;
		if (*arg == '^') {
			name++;
			type = REVERSED;
		}
		if (!get_sha1(name, sha1)) {
			if (verify)
				revs_count++;
			else
				show_rev(type, sha1, name);
			continue;
		}
		if (verify)
			die_no_single_rev(quiet);
		as_is = 1;
		if (!show_file(arg))
			continue;
		verify_filename(prefix, arg, 1);
	}
	if (verify) {
		if (revs_count == 1) {
			show_rev(type, sha1, name);
			return 0;
		} else if (revs_count == 0 && show_default())
			return 0;
		die_no_single_rev(quiet);
	} else
		show_default();
	return 0;
}
Commit	Line	Data
178cb243 LT	1	/*
	2	* rev-parse.c
	3	*
	4	* Copyright (C) Linus Torvalds, 2005
	5	*/
	6	#include "cache.h"
a8be83fe	7	#include "commit.h"
960bba0d	8	#include "refs.h"
c1babb1d	9	#include "quote.h"
895f10c3	10	#include "builtin.h"
21d47835	11	#include "parse-options.h"
a8be83fe	12
4866ccf0 JH	13	#define DO_REVS 1
	14	#define DO_NOREV 2
	15	#define DO_FLAGS 4
	16	#define DO_NONFLAGS 8
	17	static int filter = ~0;
	18
96f1e58f	19	static const char *def;
023d66ed	20
042a4ed7 LT	21	#define NORMAL 0
	22	#define REVERSED 1
	23	static int show_type = NORMAL;
a6d97d49 JH	24
	25	#define SHOW_SYMBOLIC_ASIS 1
	26	#define SHOW_SYMBOLIC_FULL 2
96f1e58f DR	27	static int symbolic;
96f1e58f DR	28	static int abbrev;
a45d3469 BW	29	static int abbrev_ref;
a45d3469 BW	30	static int abbrev_ref_strict;
96f1e58f	31	static int output_sq;
4866ccf0	32
921d865e LT	33	/*
	34	* Some arguments are relevant "revision" arguments,
	35	* others are about output format or other details.
	36	* This sorts it all out.
	37	*/
	38	static int is_rev_argument(const char *arg)
	39	{
	40	static const char *rev_args[] = {
e091eb93	41	"--all",
4866ccf0	42	"--bisect",
5a83f3be	43	"--dense",
b09fe971	44	"--branches=",
a62be77f	45	"--branches",
4866ccf0	46	"--header",
cc243c3c	47	"--ignore-missing",
921d865e	48	"--max-age=",
4866ccf0	49	"--max-count=",
4866ccf0	50	"--min-age=",
5ccfb758	51	"--no-merges",
ad5aeede MG	52	"--min-parents=",
	53	"--no-min-parents",
	54	"--max-parents=",
	55	"--no-max-parents",
4866ccf0	56	"--objects",
c6496575	57	"--objects-edge",
4866ccf0 JH	58	"--parents",
4866ccf0 JH	59	"--pretty",
b09fe971	60	"--remotes=",
a62be77f	61	"--remotes",
d08bae7e	62	"--glob=",
5a83f3be	63	"--sparse",
b09fe971	64	"--tags=",
a62be77f	65	"--tags",
4866ccf0	66	"--topo-order",
4c8725f1	67	"--date-order",
4866ccf0	68	"--unpacked",
921d865e LT	69	NULL
	70	};
	71	const char **p = rev_args;
	72
8233340c EW	73	/* accept -<digit>, like traditional "head" */
	74	if ((*arg == '-') && isdigit(arg[1]))
	75	return 1;
	76
921d865e LT	77	for (;;) {
	78	const char str = p++;
	79	int len;
	80	if (!str)
	81	return 0;
	82	len = strlen(str);
4866ccf0 JH	83	if (!strcmp(arg, str) \|\|
4866ccf0 JH	84	(str[len-1] == '=' && !strncmp(arg, str, len)))
921d865e LT	85	return 1;
	86	}
	87	}
	88
4866ccf0	89	/* Output argument as a string, either SQ or normal */
5bb2c65a JH	90	static void show(const char *arg)
	91	{
	92	if (output_sq) {
	93	int sq = '\'', ch;
	94
	95	putchar(sq);
	96	while ((ch = *arg++)) {
	97	if (ch == sq)
	98	fputs("'\\'", stdout);
	99	putchar(ch);
	100	}
	101	putchar(sq);
	102	putchar(' ');
	103	}
	104	else
	105	puts(arg);
	106	}
	107
e00f3790 JS	108	/* Like show(), but with a negation prefix according to type */
	109	static void show_with_type(int type, const char *arg)
	110	{
	111	if (type != show_type)
	112	putchar('^');
	113	show(arg);
	114	}
	115
4866ccf0	116	/* Output a revision, only if filter allows it */
30b96fce	117	static void show_rev(int type, const unsigned char sha1, const char name)
023d66ed	118	{
4866ccf0	119	if (!(filter & DO_REVS))
023d66ed	120	return;
4866ccf0	121	def = NULL;
5bb2c65a	122
a45d3469 BW	123	if ((symbolic \|\| abbrev_ref) && name) {
a45d3469 BW	124	if (symbolic == SHOW_SYMBOLIC_FULL \|\| abbrev_ref) {
a6d97d49 JH	125	unsigned char discard[20];
	126	char *full;
	127
	128	switch (dwim_ref(name, strlen(name), discard, &full)) {
	129	case 0:
	130	/*
	131	* Not found -- not a ref. We could
	132	* emit "name" here, but symbolic-full
	133	* users are interested in finding the
	134	* refs spelled in full, and they would
	135	* need to filter non-refs if we did so.
	136	*/
	137	break;
	138	case 1: /* happy */
a45d3469 BW	139	if (abbrev_ref)
	140	full = shorten_unambiguous_ref(full,
	141	abbrev_ref_strict);
e00f3790	142	show_with_type(type, full);
a6d97d49 JH	143	break;
	144	default: /* ambiguous */
	145	error("refname '%s' is ambiguous", name);
	146	break;
	147	}
	148	} else {
e00f3790	149	show_with_type(type, name);
a6d97d49 JH	150	}
a6d97d49 JH	151	}
d5012508	152	else if (abbrev)
e00f3790	153	show_with_type(type, find_unique_abbrev(sha1, abbrev));
30b96fce	154	else
e00f3790	155	show_with_type(type, sha1_to_hex(sha1));
023d66ed LT	156	}
023d66ed LT	157
4866ccf0	158	/* Output a flag, only if filter allows it. */
16cee38a	159	static int show_flag(const char *arg)
023d66ed	160	{
4866ccf0	161	if (!(filter & DO_FLAGS))
9523a4c2 LT	162	return 0;
9523a4c2 LT	163	if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
0360e99d	164	show(arg);
9523a4c2 LT	165	return 1;
	166	}
	167	return 0;
023d66ed LT	168	}
023d66ed LT	169
dfd1b749	170	static int show_default(void)
023d66ed	171	{
16cee38a	172	const char *s = def;
023d66ed LT	173
	174	if (s) {
	175	unsigned char sha1[20];
	176
	177	def = NULL;
9938af6a	178	if (!get_sha1(s, sha1)) {
30b96fce	179	show_rev(NORMAL, sha1, s);
dfd1b749	180	return 1;
023d66ed	181	}
023d66ed	182	}
dfd1b749	183	return 0;
023d66ed LT	184	}
023d66ed LT	185
8da19775	186	static int show_reference(const char refname, const unsigned char sha1, int flag, void *cb_data)
960bba0d	187	{
30b96fce	188	show_rev(NORMAL, sha1, refname);
960bba0d LT	189	return 0;
	190	}
	191
ad3f9a71 LT	192	static int anti_reference(const char refname, const unsigned char sha1, int flag, void *cb_data)
	193	{
	194	show_rev(REVERSED, sha1, refname);
	195	return 0;
	196	}
	197
957d7406 JH	198	static int show_abbrev(const unsigned char sha1, void cb_data)
	199	{
	200	show_rev(NORMAL, sha1, NULL);
	201	return 0;
	202	}
	203
c1babb1d LT	204	static void show_datestring(const char flag, const char datestr)
c1babb1d LT	205	{
c1babb1d	206	static char buffer[100];
c1babb1d LT	207
	208	/* date handling requires both flags and revs */
	209	if ((filter & (DO_FLAGS \| DO_REVS)) != (DO_FLAGS \| DO_REVS))
	210	return;
3c07b1d1	211	snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
c1babb1d LT	212	show(buffer);
	213	}
	214
9ad0a933	215	static int show_file(const char *arg)
7a3dd472	216	{
7b34c2fa	217	show_default();
9ad0a933	218	if ((filter & (DO_NONFLAGS\|DO_NOREV)) == (DO_NONFLAGS\|DO_NOREV)) {
7a3dd472	219	show(arg);
9ad0a933 LT	220	return 1;
	221	}
	222	return 0;
7a3dd472 LT	223	}
7a3dd472 LT	224
b7d936b2	225	static int try_difference(const char *arg)
3dd4e732 SB	226	{
	227	char *dotdot;
	228	unsigned char sha1[20];
	229	unsigned char end[20];
	230	const char *next;
	231	const char *this;
	232	int symmetric;
	233
	234	if (!(dotdot = strstr(arg, "..")))
	235	return 0;
	236	next = dotdot + 2;
	237	this = arg;
	238	symmetric = (*next == '.');
	239
	240	*dotdot = 0;
	241	next += symmetric;
	242
	243	if (!*next)
	244	next = "HEAD";
	245	if (dotdot == arg)
	246	this = "HEAD";
c036c4c5	247	if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
3dd4e732 SB	248	show_rev(NORMAL, end, next);
	249	show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
	250	if (symmetric) {
	251	struct commit_list *exclude;
	252	struct commit a, b;
	253	a = lookup_commit_reference(sha1);
	254	b = lookup_commit_reference(end);
	255	exclude = get_merge_bases(a, b, 1);
	256	while (exclude) {
	257	struct commit_list *n = exclude->next;
	258	show_rev(REVERSED,
	259	exclude->item->object.sha1,NULL);
	260	free(exclude);
	261	exclude = n;
	262	}
	263	}
	264	return 1;
	265	}
	266	*dotdot = '.';
	267	return 0;
	268	}
	269
2122f8b9 BS	270	static int try_parent_shorthands(const char *arg)
	271	{
	272	char *dotdot;
	273	unsigned char sha1[20];
	274	struct commit *commit;
	275	struct commit_list *parents;
	276	int parents_only;
	277
	278	if ((dotdot = strstr(arg, "^!")))
	279	parents_only = 0;
	280	else if ((dotdot = strstr(arg, "^@")))
	281	parents_only = 1;
	282
	283	if (!dotdot \|\| dotdot[2])
	284	return 0;
	285
	286	*dotdot = 0;
c036c4c5	287	if (get_sha1_committish(arg, sha1))
2122f8b9 BS	288	return 0;
	289
	290	if (!parents_only)
	291	show_rev(NORMAL, sha1, arg);
	292	commit = lookup_commit_reference(sha1);
	293	for (parents = commit->parents; parents; parents = parents->next)
	294	show_rev(parents_only ? NORMAL : REVERSED,
	295	parents->item->object.sha1, arg);
	296
	297	return 1;
	298	}
	299
21d47835 PH	300	static int parseopt_dump(const struct option o, const char arg, int unset)
	301	{
	302	struct strbuf *parsed = o->value;
	303	if (unset)
	304	strbuf_addf(parsed, " --no-%s", o->long_name);
	305	else if (o->short_name)
	306	strbuf_addf(parsed, " -%c", o->short_name);
	307	else
	308	strbuf_addf(parsed, " --%s", o->long_name);
	309	if (arg) {
	310	strbuf_addch(parsed, ' ');
	311	sq_quote_buf(parsed, arg);
	312	}
	313	return 0;
	314	}
	315
	316	static const char skipspaces(const char s)
	317	{
	318	while (isspace(*s))
	319	s++;
	320	return s;
	321	}
	322
	323	static int cmd_parseopt(int argc, const char *argv, const char prefix)
	324	{
6e0800ef	325	static int keep_dashdash = 0, stop_at_non_option = 0;
21d47835	326	static char const * const parseopt_usage[] = {
1b1dd23f	327	"git rev-parse --parseopt [options] -- [<args>...]",
21d47835 PH	328	NULL
	329	};
	330	static struct option parseopt_opts[] = {
	331	OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
	332	"keep the `--` passed as an arg"),
6e0800ef UKK	333	OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option,
	334	"stop parsing after the "
	335	"first non-option argument"),
21d47835 PH	336	OPT_END(),
	337	};
	338
f285a2d7	339	struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
21d47835 PH	340	const char **usage = NULL;
	341	struct option *opts = NULL;
	342	int onb = 0, osz = 0, unb = 0, usz = 0;
	343
21d47835	344	strbuf_addstr(&parsed, "set --");
37782920	345	argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
21d47835 PH	346	PARSE_OPT_KEEP_DASHDASH);
	347	if (argc < 1 \|\| strcmp(argv[0], "--"))
	348	usage_with_options(parseopt_usage, parseopt_opts);
	349
21d47835 PH	350	/* get the usage up to the first line with a -- on it */
	351	for (;;) {
	352	if (strbuf_getline(&sb, stdin, '\n') == EOF)
	353	die("premature end of input");
	354	ALLOC_GROW(usage, unb + 1, usz);
	355	if (!strcmp("--", sb.buf)) {
	356	if (unb < 1)
	357	die("no usage string given before the `--' separator");
	358	usage[unb] = NULL;
	359	break;
	360	}
	361	usage[unb++] = strbuf_detach(&sb, NULL);
	362	}
	363
	364	/* parse: (<short>\|<short>,<long>\|<long>)[=?]? SP+ <help> */
	365	while (strbuf_getline(&sb, stdin, '\n') != EOF) {
	366	const char *s;
	367	struct option *o;
	368
	369	if (!sb.len)
	370	continue;
	371
	372	ALLOC_GROW(opts, onb + 1, osz);
	373	memset(opts + onb, 0, sizeof(opts[onb]));
	374
	375	o = &opts[onb++];
	376	s = strchr(sb.buf, ' ');
	377	if (!s \|\| *sb.buf == ' ') {
	378	o->type = OPTION_GROUP;
e1033436	379	o->help = xstrdup(skipspaces(sb.buf));
21d47835 PH	380	continue;
	381	}
	382
	383	o->type = OPTION_CALLBACK;
	384	o->help = xstrdup(skipspaces(s));
	385	o->value = &parsed;
ff962a3f	386	o->flags = PARSE_OPT_NOARG;
21d47835	387	o->callback = &parseopt_dump;
ff962a3f PH	388	while (s > sb.buf && strchr("*=?!", s[-1])) {
	389	switch (*--s) {
	390	case '=':
	391	o->flags &= ~PARSE_OPT_NOARG;
	392	break;
	393	case '?':
	394	o->flags &= ~PARSE_OPT_NOARG;
	395	o->flags \|= PARSE_OPT_OPTARG;
	396	break;
	397	case '!':
	398	o->flags \|= PARSE_OPT_NONEG;
	399	break;
	400	case '*':
	401	o->flags \|= PARSE_OPT_HIDDEN;
	402	break;
	403	}
21d47835 PH	404	}
	405
	406	if (s - sb.buf == 1) /* short option only */
	407	o->short_name = *sb.buf;
	408	else if (sb.buf[1] != ',') /* long option only */
	409	o->long_name = xmemdupz(sb.buf, s - sb.buf);
	410	else {
	411	o->short_name = *sb.buf;
	412	o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
	413	}
	414	}
	415	strbuf_release(&sb);
	416
	417	/* put an OPT_END() */
	418	ALLOC_GROW(opts, onb + 1, osz);
	419	memset(opts + onb, 0, sizeof(opts[onb]));
37782920	420	argc = parse_options(argc, argv, prefix, opts, usage,
29981380	421	(keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) \|
fcd91f8d	422	(stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) \|
47e9cd28	423	PARSE_OPT_SHELL_EVAL);
21d47835 PH	424
21d47835 PH	425	strbuf_addf(&parsed, " --");
b319ce4c	426	sq_quote_argv(&parsed, argv, 0);
21d47835 PH	427	puts(parsed.buf);
	428	return 0;
	429	}
	430
50325377 CC	431	static int cmd_sq_quote(int argc, const char **argv)
	432	{
	433	struct strbuf buf = STRBUF_INIT;
	434
	435	if (argc)
	436	sq_quote_argv(&buf, argv, 0);
	437	printf("%s\n", buf.buf);
	438	strbuf_release(&buf);
	439
	440	return 0;
	441	}
	442
b1b35969 CC	443	static void die_no_single_rev(int quiet)
	444	{
	445	if (quiet)
	446	exit(1);
	447	else
	448	die("Needed a single revision");
	449	}
	450
7006b5be JN	451	static const char builtin_rev_parse_usage[] =
	452	"git rev-parse --parseopt [options] -- [<args>...]\n"
	453	" or: git rev-parse --sq-quote [<arg>...]\n"
	454	" or: git rev-parse [options] [<arg>...]\n"
	455	"\n"
	456	"Run \"git rev-parse --parseopt -h\" for more information on the first usage.";
	457
a633fca0	458	int cmd_rev_parse(int argc, const char *argv, const char prefix)
178cb243	459	{
dfd1b749	460	int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
178cb243	461	unsigned char sha1[20];
dfd1b749	462	const char *name = NULL;
a62be77f	463
21d47835 PH	464	if (argc > 1 && !strcmp("--parseopt", argv[1]))
	465	return cmd_parseopt(argc - 1, argv + 1, prefix);
	466
50325377 CC	467	if (argc > 1 && !strcmp("--sq-quote", argv[1]))
	468	return cmd_sq_quote(argc - 2, argv + 2);
	469
94c8ccaa GB	470	if (argc == 2 && !strcmp("--local-env-vars", argv[1])) {
	471	int i;
	472	for (i = 0; local_repo_env[i]; i++)
	473	printf("%s\n", local_repo_env[i]);
	474	return 0;
	475	}
	476
abc06822 FG	477	if (argc > 2 && !strcmp(argv[1], "--resolve-git-dir")) {
	478	const char *gitdir = resolve_gitdir(argv[2]);
	479	if (!gitdir)
	480	die("not a gitdir '%s'", argv[2]);
	481	puts(gitdir);
	482	return 0;
	483	}
	484
7006b5be JN	485	if (argc > 1 && !strcmp("-h", argv[1]))
	486	usage(builtin_rev_parse_usage);
	487
5410a02a	488	prefix = setup_git_directory();
ef90d6d4	489	git_config(git_default_config, NULL);
178cb243	490	for (i = 1; i < argc; i++) {
16cee38a	491	const char *arg = argv[i];
fb18a2ed	492
178cb243	493	if (as_is) {
fb18a2ed	494	if (show_file(arg) && as_is < 2)
023e37c3	495	verify_filename(prefix, arg, 0);
178cb243 LT	496	continue;
178cb243 LT	497	}
3af06987 EW	498	if (!strcmp(arg,"-n")) {
	499	if (++i >= argc)
	500	die("-n requires an argument");
	501	if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
	502	show(arg);
	503	show(argv[i]);
	504	}
	505	continue;
	506	}
1968d77d	507	if (!prefixcmp(arg, "-n")) {
3af06987 EW	508	if ((filter & DO_FLAGS) && (filter & DO_REVS))
	509	show(arg);
	510	continue;
	511	}
	512
178cb243 LT	513	if (*arg == '-') {
178cb243 LT	514	if (!strcmp(arg, "--")) {
fb18a2ed	515	as_is = 2;
a08b6505 LT	516	/* Pass on the "--" if we show anything but files.. */
	517	if (filter & (DO_FLAGS \| DO_REVS))
	518	show_file(arg);
4866ccf0	519	continue;
178cb243 LT	520	}
178cb243 LT	521	if (!strcmp(arg, "--default")) {
178cb243 LT	522	def = argv[i+1];
	523	i++;
	524	continue;
	525	}
8ebb0184	526	if (!strcmp(arg, "--revs-only")) {
4866ccf0	527	filter &= ~DO_NOREV;
8ebb0184 LT	528	continue;
	529	}
	530	if (!strcmp(arg, "--no-revs")) {
4866ccf0	531	filter &= ~DO_REVS;
8ebb0184 LT	532	continue;
8ebb0184 LT	533	}
f79b65aa	534	if (!strcmp(arg, "--flags")) {
4866ccf0	535	filter &= ~DO_NONFLAGS;
f79b65aa LT	536	continue;
	537	}
	538	if (!strcmp(arg, "--no-flags")) {
4866ccf0	539	filter &= ~DO_FLAGS;
f79b65aa LT	540	continue;
f79b65aa LT	541	}
023d66ed	542	if (!strcmp(arg, "--verify")) {
4866ccf0 JH	543	filter &= ~(DO_FLAGS\|DO_NOREV);
4866ccf0 JH	544	verify = 1;
023d66ed	545	continue;
921d865e	546	}
b1b35969 CC	547	if (!strcmp(arg, "--quiet") \|\| !strcmp(arg, "-q")) {
	548	quiet = 1;
	549	continue;
	550	}
62a604ba	551	if (!strcmp(arg, "--short") \|\|
cc44c765	552	!prefixcmp(arg, "--short=")) {
d5012508 JH	553	filter &= ~(DO_FLAGS\|DO_NOREV);
	554	verify = 1;
	555	abbrev = DEFAULT_ABBREV;
44de0da4 JF	556	if (arg[7] == '=')
44de0da4 JF	557	abbrev = strtoul(arg + 8, NULL, 10);
1dc4fb84 JH	558	if (abbrev < MINIMUM_ABBREV)
	559	abbrev = MINIMUM_ABBREV;
	560	else if (40 <= abbrev)
	561	abbrev = 40;
d5012508 JH	562	continue;
d5012508 JH	563	}
5bb2c65a JH	564	if (!strcmp(arg, "--sq")) {
	565	output_sq = 1;
	566	continue;
	567	}
042a4ed7 LT	568	if (!strcmp(arg, "--not")) {
	569	show_type ^= REVERSED;
	570	continue;
	571	}
30b96fce	572	if (!strcmp(arg, "--symbolic")) {
a6d97d49 JH	573	symbolic = SHOW_SYMBOLIC_ASIS;
	574	continue;
	575	}
	576	if (!strcmp(arg, "--symbolic-full-name")) {
	577	symbolic = SHOW_SYMBOLIC_FULL;
30b96fce JH	578	continue;
30b96fce JH	579	}
a45d3469 BW	580	if (!prefixcmp(arg, "--abbrev-ref") &&
	581	(!arg[12] \|\| arg[12] == '=')) {
	582	abbrev_ref = 1;
	583	abbrev_ref_strict = warn_ambiguous_refs;
	584	if (arg[12] == '=') {
	585	if (!strcmp(arg + 13, "strict"))
	586	abbrev_ref_strict = 1;
	587	else if (!strcmp(arg + 13, "loose"))
	588	abbrev_ref_strict = 0;
	589	else
	590	die("unknown mode for %s", arg);
	591	}
	592	continue;
	593	}
960bba0d	594	if (!strcmp(arg, "--all")) {
cb5d709f	595	for_each_ref(show_reference, NULL);
960bba0d LT	596	continue;
960bba0d LT	597	}
957d7406 JH	598	if (!prefixcmp(arg, "--disambiguate=")) {
	599	for_each_abbrev(arg + 15, show_abbrev, NULL);
	600	continue;
	601	}
ad3f9a71 LT	602	if (!strcmp(arg, "--bisect")) {
	603	for_each_ref_in("refs/bisect/bad", show_reference, NULL);
	604	for_each_ref_in("refs/bisect/good", anti_reference, NULL);
	605	continue;
	606	}
b09fe971 IL	607	if (!prefixcmp(arg, "--branches=")) {
	608	for_each_glob_ref_in(show_reference, arg + 11,
	609	"refs/heads/", NULL);
	610	continue;
	611	}
a62be77f	612	if (!strcmp(arg, "--branches")) {
cb5d709f	613	for_each_branch_ref(show_reference, NULL);
a62be77f SE	614	continue;
a62be77f SE	615	}
b09fe971 IL	616	if (!prefixcmp(arg, "--tags=")) {
	617	for_each_glob_ref_in(show_reference, arg + 7,
	618	"refs/tags/", NULL);
	619	continue;
	620	}
a62be77f	621	if (!strcmp(arg, "--tags")) {
cb5d709f	622	for_each_tag_ref(show_reference, NULL);
a62be77f SE	623	continue;
a62be77f SE	624	}
d08bae7e IL	625	if (!prefixcmp(arg, "--glob=")) {
	626	for_each_glob_ref(show_reference, arg + 7, NULL);
	627	continue;
	628	}
b09fe971 IL	629	if (!prefixcmp(arg, "--remotes=")) {
	630	for_each_glob_ref_in(show_reference, arg + 10,
	631	"refs/remotes/", NULL);
	632	continue;
	633	}
a62be77f	634	if (!strcmp(arg, "--remotes")) {
cb5d709f	635	for_each_remote_ref(show_reference, NULL);
a62be77f SE	636	continue;
a62be77f SE	637	}
7cceca5c SD	638	if (!strcmp(arg, "--show-toplevel")) {
	639	const char *work_tree = get_git_work_tree();
	640	if (work_tree)
	641	puts(work_tree);
	642	continue;
	643	}
d288a700	644	if (!strcmp(arg, "--show-prefix")) {
4866ccf0 JH	645	if (prefix)
4866ccf0 JH	646	puts(prefix);
658219f1 RL	647	else
658219f1 RL	648	putchar('\n');
d288a700 LT	649	continue;
d288a700 LT	650	}
5f94c730 JH	651	if (!strcmp(arg, "--show-cdup")) {
5f94c730 JH	652	const char *pfx = prefix;
e90fdc39 JS	653	if (!is_inside_work_tree()) {
	654	const char *work_tree =
	655	get_git_work_tree();
	656	if (work_tree)
	657	printf("%s\n", work_tree);
	658	continue;
	659	}
5f94c730 JH	660	while (pfx) {
	661	pfx = strchr(pfx, '/');
	662	if (pfx) {
	663	pfx++;
	664	printf("../");
	665	}
	666	}
	667	putchar('\n');
	668	continue;
	669	}
a8783eeb LT	670	if (!strcmp(arg, "--git-dir")) {
	671	const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
	672	static char cwd[PATH_MAX];
d06f15d9	673	int len;
a8783eeb LT	674	if (gitdir) {
	675	puts(gitdir);
	676	continue;
	677	}
	678	if (!prefix) {
	679	puts(".git");
	680	continue;
	681	}
	682	if (!getcwd(cwd, PATH_MAX))
0721c314	683	die_errno("unable to get current working directory");
d06f15d9 NTND	684	len = strlen(cwd);
d06f15d9 NTND	685	printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
a8783eeb LT	686	continue;
a8783eeb LT	687	}
6d9ba67b JS	688	if (!strcmp(arg, "--is-inside-git-dir")) {
	689	printf("%s\n", is_inside_git_dir() ? "true"
	690	: "false");
	691	continue;
	692	}
892c41b9 ML	693	if (!strcmp(arg, "--is-inside-work-tree")) {
	694	printf("%s\n", is_inside_work_tree() ? "true"
	695	: "false");
	696	continue;
	697	}
493c774e ML	698	if (!strcmp(arg, "--is-bare-repository")) {
	699	printf("%s\n", is_bare_repository() ? "true"
	700	: "false");
	701	continue;
	702	}
cc44c765	703	if (!prefixcmp(arg, "--since=")) {
c1babb1d LT	704	show_datestring("--max-age=", arg+8);
	705	continue;
	706	}
cc44c765	707	if (!prefixcmp(arg, "--after=")) {
c1babb1d LT	708	show_datestring("--max-age=", arg+8);
	709	continue;
	710	}
cc44c765	711	if (!prefixcmp(arg, "--before=")) {
c1babb1d LT	712	show_datestring("--min-age=", arg+9);
	713	continue;
	714	}
cc44c765	715	if (!prefixcmp(arg, "--until=")) {
c1babb1d LT	716	show_datestring("--min-age=", arg+8);
	717	continue;
	718	}
9523a4c2	719	if (show_flag(arg) && verify)
b1b35969	720	die_no_single_rev(quiet);
178cb243 LT	721	continue;
178cb243 LT	722	}
4866ccf0 JH	723
4866ccf0 JH	724	/* Not a flag argument */
3dd4e732 SB	725	if (try_difference(arg))
3dd4e732 SB	726	continue;
2122f8b9 BS	727	if (try_parent_shorthands(arg))
2122f8b9 BS	728	continue;
dfd1b749 CC	729	name = arg;
	730	type = NORMAL;
	731	if (*arg == '^') {
	732	name++;
	733	type = REVERSED;
800644c5	734	}
dfd1b749 CC	735	if (!get_sha1(name, sha1)) {
	736	if (verify)
	737	revs_count++;
	738	else
	739	show_rev(type, sha1, name);
800644c5 LT	740	continue;
800644c5 LT	741	}
75ecfce3 CC	742	if (verify)
75ecfce3 CC	743	die_no_single_rev(quiet);
9ad0a933 LT	744	as_is = 1;
	745	if (!show_file(arg))
	746	continue;
023e37c3	747	verify_filename(prefix, arg, 1);
023d66ed	748	}
dfd1b749 CC	749	if (verify) {
	750	if (revs_count == 1) {
	751	show_rev(type, sha1, name);
	752	return 0;
	753	} else if (revs_count == 0 && show_default())
	754	return 0;
b1b35969	755	die_no_single_rev(quiet);
dfd1b749 CC	756	} else
dfd1b749 CC	757	show_default();
178cb243 LT	758	return 0;
178cb243 LT	759	}