[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",
		"--header",
		"--max-age=",
		"--max-count=",
		"--min-age=",
		"--no-merges",
		"--objects",
		"--objects-edge",
		"--parents",
		"--pretty",
		"--remotes",
		"--sparse",
		"--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 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(this, sha1) && !get_sha1(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(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);

	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 > 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);
			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 (!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 (!strcmp(arg, "--branches")) {
				for_each_branch_ref(show_reference, NULL);
				continue;
			}
			if (!strcmp(arg, "--tags")) {
				for_each_tag_ref(show_reference, NULL);
				continue;
			}
			if (!strcmp(arg, "--remotes")) {
				for_each_remote_ref(show_reference, NULL);
				continue;
			}
			if (!strcmp(arg, "--show-prefix")) {
				if (prefix)
					puts(prefix);
				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];
				if (gitdir) {
					puts(gitdir);
					continue;
				}
				if (!prefix) {
					puts(".git");
					continue;
				}
				if (!getcwd(cwd, PATH_MAX))
					die_errno("unable to get current working directory");
				printf("%s/.git\n", cwd);
				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);
	}
	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",
a62be77f	44	"--branches",
4866ccf0	45	"--header",
921d865e	46	"--max-age=",
4866ccf0	47	"--max-count=",
4866ccf0	48	"--min-age=",
5ccfb758	49	"--no-merges",
4866ccf0	50	"--objects",
c6496575	51	"--objects-edge",
4866ccf0 JH	52	"--parents",
4866ccf0 JH	53	"--pretty",
a62be77f	54	"--remotes",
5a83f3be	55	"--sparse",
a62be77f	56	"--tags",
4866ccf0	57	"--topo-order",
4c8725f1	58	"--date-order",
4866ccf0	59	"--unpacked",
921d865e LT	60	NULL
	61	};
	62	const char **p = rev_args;
	63
8233340c EW	64	/* accept -<digit>, like traditional "head" */
	65	if ((*arg == '-') && isdigit(arg[1]))
	66	return 1;
	67
921d865e LT	68	for (;;) {
	69	const char str = p++;
	70	int len;
	71	if (!str)
	72	return 0;
	73	len = strlen(str);
4866ccf0 JH	74	if (!strcmp(arg, str) \|\|
4866ccf0 JH	75	(str[len-1] == '=' && !strncmp(arg, str, len)))
921d865e LT	76	return 1;
	77	}
	78	}
	79
4866ccf0	80	/* Output argument as a string, either SQ or normal */
5bb2c65a JH	81	static void show(const char *arg)
	82	{
	83	if (output_sq) {
	84	int sq = '\'', ch;
	85
	86	putchar(sq);
	87	while ((ch = *arg++)) {
	88	if (ch == sq)
	89	fputs("'\\'", stdout);
	90	putchar(ch);
	91	}
	92	putchar(sq);
	93	putchar(' ');
	94	}
	95	else
	96	puts(arg);
	97	}
	98
e00f3790 JS	99	/* Like show(), but with a negation prefix according to type */
	100	static void show_with_type(int type, const char *arg)
	101	{
	102	if (type != show_type)
	103	putchar('^');
	104	show(arg);
	105	}
	106
4866ccf0	107	/* Output a revision, only if filter allows it */
30b96fce	108	static void show_rev(int type, const unsigned char sha1, const char name)
023d66ed	109	{
4866ccf0	110	if (!(filter & DO_REVS))
023d66ed	111	return;
4866ccf0	112	def = NULL;
5bb2c65a	113
a45d3469 BW	114	if ((symbolic \|\| abbrev_ref) && name) {
a45d3469 BW	115	if (symbolic == SHOW_SYMBOLIC_FULL \|\| abbrev_ref) {
a6d97d49 JH	116	unsigned char discard[20];
	117	char *full;
	118
	119	switch (dwim_ref(name, strlen(name), discard, &full)) {
	120	case 0:
	121	/*
	122	* Not found -- not a ref. We could
	123	* emit "name" here, but symbolic-full
	124	* users are interested in finding the
	125	* refs spelled in full, and they would
	126	* need to filter non-refs if we did so.
	127	*/
	128	break;
	129	case 1: /* happy */
a45d3469 BW	130	if (abbrev_ref)
	131	full = shorten_unambiguous_ref(full,
	132	abbrev_ref_strict);
e00f3790	133	show_with_type(type, full);
a6d97d49 JH	134	break;
	135	default: /* ambiguous */
	136	error("refname '%s' is ambiguous", name);
	137	break;
	138	}
	139	} else {
e00f3790	140	show_with_type(type, name);
a6d97d49 JH	141	}
a6d97d49 JH	142	}
d5012508	143	else if (abbrev)
e00f3790	144	show_with_type(type, find_unique_abbrev(sha1, abbrev));
30b96fce	145	else
e00f3790	146	show_with_type(type, sha1_to_hex(sha1));
023d66ed LT	147	}
023d66ed LT	148
4866ccf0	149	/* Output a flag, only if filter allows it. */
16cee38a	150	static int show_flag(const char *arg)
023d66ed	151	{
4866ccf0	152	if (!(filter & DO_FLAGS))
9523a4c2 LT	153	return 0;
9523a4c2 LT	154	if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
0360e99d	155	show(arg);
9523a4c2 LT	156	return 1;
	157	}
	158	return 0;
023d66ed LT	159	}
023d66ed LT	160
dfd1b749	161	static int show_default(void)
023d66ed	162	{
16cee38a	163	const char *s = def;
023d66ed LT	164
	165	if (s) {
	166	unsigned char sha1[20];
	167
	168	def = NULL;
9938af6a	169	if (!get_sha1(s, sha1)) {
30b96fce	170	show_rev(NORMAL, sha1, s);
dfd1b749	171	return 1;
023d66ed	172	}
023d66ed	173	}
dfd1b749	174	return 0;
023d66ed LT	175	}
023d66ed LT	176
8da19775	177	static int show_reference(const char refname, const unsigned char sha1, int flag, void *cb_data)
960bba0d	178	{
30b96fce	179	show_rev(NORMAL, sha1, refname);
960bba0d LT	180	return 0;
	181	}
	182
ad3f9a71 LT	183	static int anti_reference(const char refname, const unsigned char sha1, int flag, void *cb_data)
	184	{
	185	show_rev(REVERSED, sha1, refname);
	186	return 0;
	187	}
	188
c1babb1d LT	189	static void show_datestring(const char flag, const char datestr)
c1babb1d LT	190	{
c1babb1d	191	static char buffer[100];
c1babb1d LT	192
	193	/* date handling requires both flags and revs */
	194	if ((filter & (DO_FLAGS \| DO_REVS)) != (DO_FLAGS \| DO_REVS))
	195	return;
3c07b1d1	196	snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
c1babb1d LT	197	show(buffer);
	198	}
	199
9ad0a933	200	static int show_file(const char *arg)
7a3dd472	201	{
7b34c2fa	202	show_default();
9ad0a933	203	if ((filter & (DO_NONFLAGS\|DO_NOREV)) == (DO_NONFLAGS\|DO_NOREV)) {
7a3dd472	204	show(arg);
9ad0a933 LT	205	return 1;
	206	}
	207	return 0;
7a3dd472 LT	208	}
7a3dd472 LT	209
b7d936b2	210	static int try_difference(const char *arg)
3dd4e732 SB	211	{
	212	char *dotdot;
	213	unsigned char sha1[20];
	214	unsigned char end[20];
	215	const char *next;
	216	const char *this;
	217	int symmetric;
	218
	219	if (!(dotdot = strstr(arg, "..")))
	220	return 0;
	221	next = dotdot + 2;
	222	this = arg;
	223	symmetric = (*next == '.');
	224
	225	*dotdot = 0;
	226	next += symmetric;
	227
	228	if (!*next)
	229	next = "HEAD";
	230	if (dotdot == arg)
	231	this = "HEAD";
	232	if (!get_sha1(this, sha1) && !get_sha1(next, end)) {
	233	show_rev(NORMAL, end, next);
	234	show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
	235	if (symmetric) {
	236	struct commit_list *exclude;
	237	struct commit a, b;
	238	a = lookup_commit_reference(sha1);
	239	b = lookup_commit_reference(end);
	240	exclude = get_merge_bases(a, b, 1);
	241	while (exclude) {
	242	struct commit_list *n = exclude->next;
	243	show_rev(REVERSED,
	244	exclude->item->object.sha1,NULL);
	245	free(exclude);
	246	exclude = n;
	247	}
	248	}
	249	return 1;
	250	}
	251	*dotdot = '.';
	252	return 0;
	253	}
	254
2122f8b9 BS	255	static int try_parent_shorthands(const char *arg)
	256	{
	257	char *dotdot;
	258	unsigned char sha1[20];
	259	struct commit *commit;
	260	struct commit_list *parents;
	261	int parents_only;
	262
	263	if ((dotdot = strstr(arg, "^!")))
	264	parents_only = 0;
	265	else if ((dotdot = strstr(arg, "^@")))
	266	parents_only = 1;
	267
	268	if (!dotdot \|\| dotdot[2])
	269	return 0;
	270
	271	*dotdot = 0;
	272	if (get_sha1(arg, sha1))
	273	return 0;
	274
	275	if (!parents_only)
	276	show_rev(NORMAL, sha1, arg);
	277	commit = lookup_commit_reference(sha1);
	278	for (parents = commit->parents; parents; parents = parents->next)
	279	show_rev(parents_only ? NORMAL : REVERSED,
	280	parents->item->object.sha1, arg);
	281
	282	return 1;
	283	}
	284
21d47835 PH	285	static int parseopt_dump(const struct option o, const char arg, int unset)
	286	{
	287	struct strbuf *parsed = o->value;
	288	if (unset)
	289	strbuf_addf(parsed, " --no-%s", o->long_name);
	290	else if (o->short_name)
	291	strbuf_addf(parsed, " -%c", o->short_name);
	292	else
	293	strbuf_addf(parsed, " --%s", o->long_name);
	294	if (arg) {
	295	strbuf_addch(parsed, ' ');
	296	sq_quote_buf(parsed, arg);
	297	}
	298	return 0;
	299	}
	300
	301	static const char skipspaces(const char s)
	302	{
	303	while (isspace(*s))
	304	s++;
	305	return s;
	306	}
	307
	308	static int cmd_parseopt(int argc, const char *argv, const char prefix)
	309	{
6e0800ef	310	static int keep_dashdash = 0, stop_at_non_option = 0;
21d47835	311	static char const * const parseopt_usage[] = {
1b1dd23f	312	"git rev-parse --parseopt [options] -- [<args>...]",
21d47835 PH	313	NULL
	314	};
	315	static struct option parseopt_opts[] = {
	316	OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
	317	"keep the `--` passed as an arg"),
6e0800ef UKK	318	OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option,
	319	"stop parsing after the "
	320	"first non-option argument"),
21d47835 PH	321	OPT_END(),
	322	};
	323
f285a2d7	324	struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
21d47835 PH	325	const char **usage = NULL;
	326	struct option *opts = NULL;
	327	int onb = 0, osz = 0, unb = 0, usz = 0;
	328
21d47835	329	strbuf_addstr(&parsed, "set --");
37782920	330	argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
21d47835 PH	331	PARSE_OPT_KEEP_DASHDASH);
	332	if (argc < 1 \|\| strcmp(argv[0], "--"))
	333	usage_with_options(parseopt_usage, parseopt_opts);
	334
21d47835 PH	335	/* get the usage up to the first line with a -- on it */
	336	for (;;) {
	337	if (strbuf_getline(&sb, stdin, '\n') == EOF)
	338	die("premature end of input");
	339	ALLOC_GROW(usage, unb + 1, usz);
	340	if (!strcmp("--", sb.buf)) {
	341	if (unb < 1)
	342	die("no usage string given before the `--' separator");
	343	usage[unb] = NULL;
	344	break;
	345	}
	346	usage[unb++] = strbuf_detach(&sb, NULL);
	347	}
	348
	349	/* parse: (<short>\|<short>,<long>\|<long>)[=?]? SP+ <help> */
	350	while (strbuf_getline(&sb, stdin, '\n') != EOF) {
	351	const char *s;
	352	struct option *o;
	353
	354	if (!sb.len)
	355	continue;
	356
	357	ALLOC_GROW(opts, onb + 1, osz);
	358	memset(opts + onb, 0, sizeof(opts[onb]));
	359
	360	o = &opts[onb++];
	361	s = strchr(sb.buf, ' ');
	362	if (!s \|\| *sb.buf == ' ') {
	363	o->type = OPTION_GROUP;
e1033436	364	o->help = xstrdup(skipspaces(sb.buf));
21d47835 PH	365	continue;
	366	}
	367
	368	o->type = OPTION_CALLBACK;
	369	o->help = xstrdup(skipspaces(s));
	370	o->value = &parsed;
ff962a3f	371	o->flags = PARSE_OPT_NOARG;
21d47835	372	o->callback = &parseopt_dump;
ff962a3f PH	373	while (s > sb.buf && strchr("*=?!", s[-1])) {
	374	switch (*--s) {
	375	case '=':
	376	o->flags &= ~PARSE_OPT_NOARG;
	377	break;
	378	case '?':
	379	o->flags &= ~PARSE_OPT_NOARG;
	380	o->flags \|= PARSE_OPT_OPTARG;
	381	break;
	382	case '!':
	383	o->flags \|= PARSE_OPT_NONEG;
	384	break;
	385	case '*':
	386	o->flags \|= PARSE_OPT_HIDDEN;
	387	break;
	388	}
21d47835 PH	389	}
	390
	391	if (s - sb.buf == 1) /* short option only */
	392	o->short_name = *sb.buf;
	393	else if (sb.buf[1] != ',') /* long option only */
	394	o->long_name = xmemdupz(sb.buf, s - sb.buf);
	395	else {
	396	o->short_name = *sb.buf;
	397	o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
	398	}
	399	}
	400	strbuf_release(&sb);
	401
	402	/* put an OPT_END() */
	403	ALLOC_GROW(opts, onb + 1, osz);
	404	memset(opts + onb, 0, sizeof(opts[onb]));
37782920	405	argc = parse_options(argc, argv, prefix, opts, usage,
6e0800ef UKK	406	keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0 \|
6e0800ef UKK	407	stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0);
21d47835 PH	408
21d47835 PH	409	strbuf_addf(&parsed, " --");
b319ce4c	410	sq_quote_argv(&parsed, argv, 0);
21d47835 PH	411	puts(parsed.buf);
	412	return 0;
	413	}
	414
50325377 CC	415	static int cmd_sq_quote(int argc, const char **argv)
	416	{
	417	struct strbuf buf = STRBUF_INIT;
	418
	419	if (argc)
	420	sq_quote_argv(&buf, argv, 0);
	421	printf("%s\n", buf.buf);
	422	strbuf_release(&buf);
	423
	424	return 0;
	425	}
	426
b1b35969 CC	427	static void die_no_single_rev(int quiet)
	428	{
	429	if (quiet)
	430	exit(1);
	431	else
	432	die("Needed a single revision");
	433	}
	434
7006b5be JN	435	static const char builtin_rev_parse_usage[] =
	436	"git rev-parse --parseopt [options] -- [<args>...]\n"
	437	" or: git rev-parse --sq-quote [<arg>...]\n"
	438	" or: git rev-parse [options] [<arg>...]\n"
	439	"\n"
	440	"Run \"git rev-parse --parseopt -h\" for more information on the first usage.";
	441
a633fca0	442	int cmd_rev_parse(int argc, const char *argv, const char prefix)
178cb243	443	{
dfd1b749	444	int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
178cb243	445	unsigned char sha1[20];
dfd1b749	446	const char *name = NULL;
a62be77f	447
21d47835 PH	448	if (argc > 1 && !strcmp("--parseopt", argv[1]))
	449	return cmd_parseopt(argc - 1, argv + 1, prefix);
	450
50325377 CC	451	if (argc > 1 && !strcmp("--sq-quote", argv[1]))
	452	return cmd_sq_quote(argc - 2, argv + 2);
	453
7006b5be JN	454	if (argc > 1 && !strcmp("-h", argv[1]))
	455	usage(builtin_rev_parse_usage);
	456
5410a02a	457	prefix = setup_git_directory();
ef90d6d4	458	git_config(git_default_config, NULL);
178cb243	459	for (i = 1; i < argc; i++) {
16cee38a	460	const char *arg = argv[i];
fb18a2ed	461
178cb243	462	if (as_is) {
fb18a2ed	463	if (show_file(arg) && as_is < 2)
e23d0b4a	464	verify_filename(prefix, arg);
178cb243 LT	465	continue;
178cb243 LT	466	}
3af06987 EW	467	if (!strcmp(arg,"-n")) {
	468	if (++i >= argc)
	469	die("-n requires an argument");
	470	if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
	471	show(arg);
	472	show(argv[i]);
	473	}
	474	continue;
	475	}
1968d77d	476	if (!prefixcmp(arg, "-n")) {
3af06987 EW	477	if ((filter & DO_FLAGS) && (filter & DO_REVS))
	478	show(arg);
	479	continue;
	480	}
	481
178cb243 LT	482	if (*arg == '-') {
178cb243 LT	483	if (!strcmp(arg, "--")) {
fb18a2ed	484	as_is = 2;
a08b6505 LT	485	/* Pass on the "--" if we show anything but files.. */
	486	if (filter & (DO_FLAGS \| DO_REVS))
	487	show_file(arg);
4866ccf0	488	continue;
178cb243 LT	489	}
178cb243 LT	490	if (!strcmp(arg, "--default")) {
178cb243 LT	491	def = argv[i+1];
	492	i++;
	493	continue;
	494	}
8ebb0184	495	if (!strcmp(arg, "--revs-only")) {
4866ccf0	496	filter &= ~DO_NOREV;
8ebb0184 LT	497	continue;
	498	}
	499	if (!strcmp(arg, "--no-revs")) {
4866ccf0	500	filter &= ~DO_REVS;
8ebb0184 LT	501	continue;
8ebb0184 LT	502	}
f79b65aa	503	if (!strcmp(arg, "--flags")) {
4866ccf0	504	filter &= ~DO_NONFLAGS;
f79b65aa LT	505	continue;
	506	}
	507	if (!strcmp(arg, "--no-flags")) {
4866ccf0	508	filter &= ~DO_FLAGS;
f79b65aa LT	509	continue;
f79b65aa LT	510	}
023d66ed	511	if (!strcmp(arg, "--verify")) {
4866ccf0 JH	512	filter &= ~(DO_FLAGS\|DO_NOREV);
4866ccf0 JH	513	verify = 1;
023d66ed	514	continue;
921d865e	515	}
b1b35969 CC	516	if (!strcmp(arg, "--quiet") \|\| !strcmp(arg, "-q")) {
	517	quiet = 1;
	518	continue;
	519	}
62a604ba	520	if (!strcmp(arg, "--short") \|\|
cc44c765	521	!prefixcmp(arg, "--short=")) {
d5012508 JH	522	filter &= ~(DO_FLAGS\|DO_NOREV);
	523	verify = 1;
	524	abbrev = DEFAULT_ABBREV;
44de0da4 JF	525	if (arg[7] == '=')
44de0da4 JF	526	abbrev = strtoul(arg + 8, NULL, 10);
1dc4fb84 JH	527	if (abbrev < MINIMUM_ABBREV)
	528	abbrev = MINIMUM_ABBREV;
	529	else if (40 <= abbrev)
	530	abbrev = 40;
d5012508 JH	531	continue;
d5012508 JH	532	}
5bb2c65a JH	533	if (!strcmp(arg, "--sq")) {
	534	output_sq = 1;
	535	continue;
	536	}
042a4ed7 LT	537	if (!strcmp(arg, "--not")) {
	538	show_type ^= REVERSED;
	539	continue;
	540	}
30b96fce	541	if (!strcmp(arg, "--symbolic")) {
a6d97d49 JH	542	symbolic = SHOW_SYMBOLIC_ASIS;
	543	continue;
	544	}
	545	if (!strcmp(arg, "--symbolic-full-name")) {
	546	symbolic = SHOW_SYMBOLIC_FULL;
30b96fce JH	547	continue;
30b96fce JH	548	}
a45d3469 BW	549	if (!prefixcmp(arg, "--abbrev-ref") &&
	550	(!arg[12] \|\| arg[12] == '=')) {
	551	abbrev_ref = 1;
	552	abbrev_ref_strict = warn_ambiguous_refs;
	553	if (arg[12] == '=') {
	554	if (!strcmp(arg + 13, "strict"))
	555	abbrev_ref_strict = 1;
	556	else if (!strcmp(arg + 13, "loose"))
	557	abbrev_ref_strict = 0;
	558	else
	559	die("unknown mode for %s", arg);
	560	}
	561	continue;
	562	}
960bba0d	563	if (!strcmp(arg, "--all")) {
cb5d709f	564	for_each_ref(show_reference, NULL);
960bba0d LT	565	continue;
960bba0d LT	566	}
ad3f9a71 LT	567	if (!strcmp(arg, "--bisect")) {
	568	for_each_ref_in("refs/bisect/bad", show_reference, NULL);
	569	for_each_ref_in("refs/bisect/good", anti_reference, NULL);
	570	continue;
	571	}
a62be77f	572	if (!strcmp(arg, "--branches")) {
cb5d709f	573	for_each_branch_ref(show_reference, NULL);
a62be77f SE	574	continue;
	575	}
	576	if (!strcmp(arg, "--tags")) {
cb5d709f	577	for_each_tag_ref(show_reference, NULL);
a62be77f SE	578	continue;
	579	}
	580	if (!strcmp(arg, "--remotes")) {
cb5d709f	581	for_each_remote_ref(show_reference, NULL);
a62be77f SE	582	continue;
a62be77f SE	583	}
d288a700	584	if (!strcmp(arg, "--show-prefix")) {
4866ccf0 JH	585	if (prefix)
4866ccf0 JH	586	puts(prefix);
d288a700 LT	587	continue;
d288a700 LT	588	}
5f94c730 JH	589	if (!strcmp(arg, "--show-cdup")) {
5f94c730 JH	590	const char *pfx = prefix;
e90fdc39 JS	591	if (!is_inside_work_tree()) {
	592	const char *work_tree =
	593	get_git_work_tree();
	594	if (work_tree)
	595	printf("%s\n", work_tree);
	596	continue;
	597	}
5f94c730 JH	598	while (pfx) {
	599	pfx = strchr(pfx, '/');
	600	if (pfx) {
	601	pfx++;
	602	printf("../");
	603	}
	604	}
	605	putchar('\n');
	606	continue;
	607	}
a8783eeb LT	608	if (!strcmp(arg, "--git-dir")) {
	609	const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
	610	static char cwd[PATH_MAX];
	611	if (gitdir) {
	612	puts(gitdir);
	613	continue;
	614	}
	615	if (!prefix) {
	616	puts(".git");
	617	continue;
	618	}
	619	if (!getcwd(cwd, PATH_MAX))
0721c314	620	die_errno("unable to get current working directory");
a8783eeb LT	621	printf("%s/.git\n", cwd);
	622	continue;
	623	}
6d9ba67b JS	624	if (!strcmp(arg, "--is-inside-git-dir")) {
	625	printf("%s\n", is_inside_git_dir() ? "true"
	626	: "false");
	627	continue;
	628	}
892c41b9 ML	629	if (!strcmp(arg, "--is-inside-work-tree")) {
	630	printf("%s\n", is_inside_work_tree() ? "true"
	631	: "false");
	632	continue;
	633	}
493c774e ML	634	if (!strcmp(arg, "--is-bare-repository")) {
	635	printf("%s\n", is_bare_repository() ? "true"
	636	: "false");
	637	continue;
	638	}
cc44c765	639	if (!prefixcmp(arg, "--since=")) {
c1babb1d LT	640	show_datestring("--max-age=", arg+8);
	641	continue;
	642	}
cc44c765	643	if (!prefixcmp(arg, "--after=")) {
c1babb1d LT	644	show_datestring("--max-age=", arg+8);
	645	continue;
	646	}
cc44c765	647	if (!prefixcmp(arg, "--before=")) {
c1babb1d LT	648	show_datestring("--min-age=", arg+9);
	649	continue;
	650	}
cc44c765	651	if (!prefixcmp(arg, "--until=")) {
c1babb1d LT	652	show_datestring("--min-age=", arg+8);
	653	continue;
	654	}
9523a4c2	655	if (show_flag(arg) && verify)
b1b35969	656	die_no_single_rev(quiet);
178cb243 LT	657	continue;
178cb243 LT	658	}
4866ccf0 JH	659
4866ccf0 JH	660	/* Not a flag argument */
3dd4e732 SB	661	if (try_difference(arg))
3dd4e732 SB	662	continue;
2122f8b9 BS	663	if (try_parent_shorthands(arg))
2122f8b9 BS	664	continue;
dfd1b749 CC	665	name = arg;
	666	type = NORMAL;
	667	if (*arg == '^') {
	668	name++;
	669	type = REVERSED;
800644c5	670	}
dfd1b749 CC	671	if (!get_sha1(name, sha1)) {
	672	if (verify)
	673	revs_count++;
	674	else
	675	show_rev(type, sha1, name);
800644c5 LT	676	continue;
800644c5 LT	677	}
75ecfce3 CC	678	if (verify)
75ecfce3 CC	679	die_no_single_rev(quiet);
9ad0a933 LT	680	as_is = 1;
	681	if (!show_file(arg))
	682	continue;
e23d0b4a	683	verify_filename(prefix, arg);
023d66ed	684	}
dfd1b749 CC	685	if (verify) {
	686	if (revs_count == 1) {
	687	show_rev(type, sha1, name);
	688	return 0;
	689	} else if (revs_count == 0 && show_default())
	690	return 0;
b1b35969	691	die_no_single_rev(quiet);
dfd1b749 CC	692	} else
dfd1b749 CC	693	show_default();
178cb243 LT	694	return 0;
178cb243 LT	695	}