pickaxe: assert that we must have a needle under -G or -S
[git/debian.git] / builtin / rev-parse.c
blob85bad9052ebcce8e84875cbfb0a5a4da4be7f3ac
1 /*
2 * rev-parse.c
4 * Copyright (C) Linus Torvalds, 2005
5 */
6 #define USE_THE_INDEX_COMPATIBILITY_MACROS
7 #include "cache.h"
8 #include "config.h"
9 #include "commit.h"
10 #include "refs.h"
11 #include "quote.h"
12 #include "builtin.h"
13 #include "parse-options.h"
14 #include "diff.h"
15 #include "revision.h"
16 #include "split-index.h"
17 #include "submodule.h"
18 #include "commit-reach.h"
19 #include "shallow.h"
21 #define DO_REVS 1
22 #define DO_NOREV 2
23 #define DO_FLAGS 4
24 #define DO_NONFLAGS 8
25 static int filter = ~0;
27 static const char *def;
29 #define NORMAL 0
30 #define REVERSED 1
31 static int show_type = NORMAL;
33 #define SHOW_SYMBOLIC_ASIS 1
34 #define SHOW_SYMBOLIC_FULL 2
35 static int symbolic;
36 static int abbrev;
37 static int abbrev_ref;
38 static int abbrev_ref_strict;
39 static int output_sq;
41 static int stuck_long;
42 static struct string_list *ref_excludes;
45 * Some arguments are relevant "revision" arguments,
46 * others are about output format or other details.
47 * This sorts it all out.
49 static int is_rev_argument(const char *arg)
51 static const char *rev_args[] = {
52 "--all",
53 "--bisect",
54 "--dense",
55 "--branches=",
56 "--branches",
57 "--header",
58 "--ignore-missing",
59 "--max-age=",
60 "--max-count=",
61 "--min-age=",
62 "--no-merges",
63 "--min-parents=",
64 "--no-min-parents",
65 "--max-parents=",
66 "--no-max-parents",
67 "--objects",
68 "--objects-edge",
69 "--parents",
70 "--pretty",
71 "--remotes=",
72 "--remotes",
73 "--glob=",
74 "--sparse",
75 "--tags=",
76 "--tags",
77 "--topo-order",
78 "--date-order",
79 "--unpacked",
80 NULL
82 const char **p = rev_args;
84 /* accept -<digit>, like traditional "head" */
85 if ((*arg == '-') && isdigit(arg[1]))
86 return 1;
88 for (;;) {
89 const char *str = *p++;
90 int len;
91 if (!str)
92 return 0;
93 len = strlen(str);
94 if (!strcmp(arg, str) ||
95 (str[len-1] == '=' && !strncmp(arg, str, len)))
96 return 1;
100 /* Output argument as a string, either SQ or normal */
101 static void show(const char *arg)
103 if (output_sq) {
104 int sq = '\'', ch;
106 putchar(sq);
107 while ((ch = *arg++)) {
108 if (ch == sq)
109 fputs("'\\'", stdout);
110 putchar(ch);
112 putchar(sq);
113 putchar(' ');
115 else
116 puts(arg);
119 /* Like show(), but with a negation prefix according to type */
120 static void show_with_type(int type, const char *arg)
122 if (type != show_type)
123 putchar('^');
124 show(arg);
127 /* Output a revision, only if filter allows it */
128 static void show_rev(int type, const struct object_id *oid, const char *name)
130 if (!(filter & DO_REVS))
131 return;
132 def = NULL;
134 if ((symbolic || abbrev_ref) && name) {
135 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
136 struct object_id discard;
137 char *full;
139 switch (dwim_ref(name, strlen(name), &discard, &full, 0)) {
140 case 0:
142 * Not found -- not a ref. We could
143 * emit "name" here, but symbolic-full
144 * users are interested in finding the
145 * refs spelled in full, and they would
146 * need to filter non-refs if we did so.
148 break;
149 case 1: /* happy */
150 if (abbrev_ref)
151 full = shorten_unambiguous_ref(full,
152 abbrev_ref_strict);
153 show_with_type(type, full);
154 break;
155 default: /* ambiguous */
156 error("refname '%s' is ambiguous", name);
157 break;
159 free(full);
160 } else {
161 show_with_type(type, name);
164 else if (abbrev)
165 show_with_type(type, find_unique_abbrev(oid, abbrev));
166 else
167 show_with_type(type, oid_to_hex(oid));
170 /* Output a flag, only if filter allows it. */
171 static int show_flag(const char *arg)
173 if (!(filter & DO_FLAGS))
174 return 0;
175 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
176 show(arg);
177 return 1;
179 return 0;
182 static int show_default(void)
184 const char *s = def;
186 if (s) {
187 struct object_id oid;
189 def = NULL;
190 if (!get_oid(s, &oid)) {
191 show_rev(NORMAL, &oid, s);
192 return 1;
195 return 0;
198 static int show_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
200 if (ref_excluded(ref_excludes, refname))
201 return 0;
202 show_rev(NORMAL, oid, refname);
203 return 0;
206 static int anti_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
208 show_rev(REVERSED, oid, refname);
209 return 0;
212 static int show_abbrev(const struct object_id *oid, void *cb_data)
214 show_rev(NORMAL, oid, NULL);
215 return 0;
218 static void show_datestring(const char *flag, const char *datestr)
220 char *buffer;
222 /* date handling requires both flags and revs */
223 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
224 return;
225 buffer = xstrfmt("%s%"PRItime, flag, approxidate(datestr));
226 show(buffer);
227 free(buffer);
230 static int show_file(const char *arg, int output_prefix)
232 show_default();
233 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
234 if (output_prefix) {
235 const char *prefix = startup_info->prefix;
236 char *fname = prefix_filename(prefix, arg);
237 show(fname);
238 free(fname);
239 } else
240 show(arg);
241 return 1;
243 return 0;
246 static int try_difference(const char *arg)
248 char *dotdot;
249 struct object_id start_oid;
250 struct object_id end_oid;
251 const char *end;
252 const char *start;
253 int symmetric;
254 static const char head_by_default[] = "HEAD";
256 if (!(dotdot = strstr(arg, "..")))
257 return 0;
258 end = dotdot + 2;
259 start = arg;
260 symmetric = (*end == '.');
262 *dotdot = 0;
263 end += symmetric;
265 if (!*end)
266 end = head_by_default;
267 if (dotdot == arg)
268 start = head_by_default;
270 if (start == head_by_default && end == head_by_default &&
271 !symmetric) {
273 * Just ".."? That is not a range but the
274 * pathspec for the parent directory.
276 *dotdot = '.';
277 return 0;
280 if (!get_oid_committish(start, &start_oid) && !get_oid_committish(end, &end_oid)) {
281 show_rev(NORMAL, &end_oid, end);
282 show_rev(symmetric ? NORMAL : REVERSED, &start_oid, start);
283 if (symmetric) {
284 struct commit_list *exclude;
285 struct commit *a, *b;
286 a = lookup_commit_reference(the_repository, &start_oid);
287 b = lookup_commit_reference(the_repository, &end_oid);
288 if (!a || !b) {
289 *dotdot = '.';
290 return 0;
292 exclude = get_merge_bases(a, b);
293 while (exclude) {
294 struct commit *commit = pop_commit(&exclude);
295 show_rev(REVERSED, &commit->object.oid, NULL);
298 *dotdot = '.';
299 return 1;
301 *dotdot = '.';
302 return 0;
305 static int try_parent_shorthands(const char *arg)
307 char *dotdot;
308 struct object_id oid;
309 struct commit *commit;
310 struct commit_list *parents;
311 int parent_number;
312 int include_rev = 0;
313 int include_parents = 0;
314 int exclude_parent = 0;
316 if ((dotdot = strstr(arg, "^!"))) {
317 include_rev = 1;
318 if (dotdot[2])
319 return 0;
320 } else if ((dotdot = strstr(arg, "^@"))) {
321 include_parents = 1;
322 if (dotdot[2])
323 return 0;
324 } else if ((dotdot = strstr(arg, "^-"))) {
325 include_rev = 1;
326 exclude_parent = 1;
328 if (dotdot[2]) {
329 char *end;
330 exclude_parent = strtoul(dotdot + 2, &end, 10);
331 if (*end != '\0' || !exclude_parent)
332 return 0;
334 } else
335 return 0;
337 *dotdot = 0;
338 if (get_oid_committish(arg, &oid) ||
339 !(commit = lookup_commit_reference(the_repository, &oid))) {
340 *dotdot = '^';
341 return 0;
344 if (exclude_parent &&
345 exclude_parent > commit_list_count(commit->parents)) {
346 *dotdot = '^';
347 return 0;
350 if (include_rev)
351 show_rev(NORMAL, &oid, arg);
352 for (parents = commit->parents, parent_number = 1;
353 parents;
354 parents = parents->next, parent_number++) {
355 char *name = NULL;
357 if (exclude_parent && parent_number != exclude_parent)
358 continue;
360 if (symbolic)
361 name = xstrfmt("%s^%d", arg, parent_number);
362 show_rev(include_parents ? NORMAL : REVERSED,
363 &parents->item->object.oid, name);
364 free(name);
367 *dotdot = '^';
368 return 1;
371 static int parseopt_dump(const struct option *o, const char *arg, int unset)
373 struct strbuf *parsed = o->value;
374 if (unset)
375 strbuf_addf(parsed, " --no-%s", o->long_name);
376 else if (o->short_name && (o->long_name == NULL || !stuck_long))
377 strbuf_addf(parsed, " -%c", o->short_name);
378 else
379 strbuf_addf(parsed, " --%s", o->long_name);
380 if (arg) {
381 if (!stuck_long)
382 strbuf_addch(parsed, ' ');
383 else if (o->long_name)
384 strbuf_addch(parsed, '=');
385 sq_quote_buf(parsed, arg);
387 return 0;
390 static const char *skipspaces(const char *s)
392 while (isspace(*s))
393 s++;
394 return s;
397 static char *findspace(const char *s)
399 for (; *s; s++)
400 if (isspace(*s))
401 return (char*)s;
402 return NULL;
405 static int cmd_parseopt(int argc, const char **argv, const char *prefix)
407 static int keep_dashdash = 0, stop_at_non_option = 0;
408 static char const * const parseopt_usage[] = {
409 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
410 NULL
412 static struct option parseopt_opts[] = {
413 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
414 N_("keep the `--` passed as an arg")),
415 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
416 N_("stop parsing after the "
417 "first non-option argument")),
418 OPT_BOOL(0, "stuck-long", &stuck_long,
419 N_("output in stuck long form")),
420 OPT_END(),
422 static const char * const flag_chars = "*=?!";
424 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
425 const char **usage = NULL;
426 struct option *opts = NULL;
427 int onb = 0, osz = 0, unb = 0, usz = 0;
429 strbuf_addstr(&parsed, "set --");
430 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
431 PARSE_OPT_KEEP_DASHDASH);
432 if (argc < 1 || strcmp(argv[0], "--"))
433 usage_with_options(parseopt_usage, parseopt_opts);
435 /* get the usage up to the first line with a -- on it */
436 for (;;) {
437 if (strbuf_getline(&sb, stdin) == EOF)
438 die("premature end of input");
439 ALLOC_GROW(usage, unb + 1, usz);
440 if (!strcmp("--", sb.buf)) {
441 if (unb < 1)
442 die("no usage string given before the `--' separator");
443 usage[unb] = NULL;
444 break;
446 usage[unb++] = strbuf_detach(&sb, NULL);
449 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
450 while (strbuf_getline(&sb, stdin) != EOF) {
451 const char *s;
452 char *help;
453 struct option *o;
455 if (!sb.len)
456 continue;
458 ALLOC_GROW(opts, onb + 1, osz);
459 memset(opts + onb, 0, sizeof(opts[onb]));
461 o = &opts[onb++];
462 help = findspace(sb.buf);
463 if (!help || sb.buf == help) {
464 o->type = OPTION_GROUP;
465 o->help = xstrdup(skipspaces(sb.buf));
466 continue;
469 *help = '\0';
471 o->type = OPTION_CALLBACK;
472 o->help = xstrdup(skipspaces(help+1));
473 o->value = &parsed;
474 o->flags = PARSE_OPT_NOARG;
475 o->callback = &parseopt_dump;
477 /* name(s) */
478 s = strpbrk(sb.buf, flag_chars);
479 if (s == NULL)
480 s = help;
482 if (s - sb.buf == 1) /* short option only */
483 o->short_name = *sb.buf;
484 else if (sb.buf[1] != ',') /* long option only */
485 o->long_name = xmemdupz(sb.buf, s - sb.buf);
486 else {
487 o->short_name = *sb.buf;
488 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
491 /* flags */
492 while (s < help) {
493 switch (*s++) {
494 case '=':
495 o->flags &= ~PARSE_OPT_NOARG;
496 continue;
497 case '?':
498 o->flags &= ~PARSE_OPT_NOARG;
499 o->flags |= PARSE_OPT_OPTARG;
500 continue;
501 case '!':
502 o->flags |= PARSE_OPT_NONEG;
503 continue;
504 case '*':
505 o->flags |= PARSE_OPT_HIDDEN;
506 continue;
508 s--;
509 break;
512 if (s < help)
513 o->argh = xmemdupz(s, help - s);
515 strbuf_release(&sb);
517 /* put an OPT_END() */
518 ALLOC_GROW(opts, onb + 1, osz);
519 memset(opts + onb, 0, sizeof(opts[onb]));
520 argc = parse_options(argc, argv, prefix, opts, usage,
521 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
522 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
523 PARSE_OPT_SHELL_EVAL);
525 strbuf_addstr(&parsed, " --");
526 sq_quote_argv(&parsed, argv);
527 puts(parsed.buf);
528 return 0;
531 static int cmd_sq_quote(int argc, const char **argv)
533 struct strbuf buf = STRBUF_INIT;
535 if (argc)
536 sq_quote_argv(&buf, argv);
537 printf("%s\n", buf.buf);
538 strbuf_release(&buf);
540 return 0;
543 static void die_no_single_rev(int quiet)
545 if (quiet)
546 exit(1);
547 else
548 die("Needed a single revision");
551 static const char builtin_rev_parse_usage[] =
552 N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
553 " or: git rev-parse --sq-quote [<arg>...]\n"
554 " or: git rev-parse [<options>] [<arg>...]\n"
555 "\n"
556 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
559 * Parse "opt" or "opt=<value>", setting value respectively to either
560 * NULL or the string after "=".
562 static int opt_with_value(const char *arg, const char *opt, const char **value)
564 if (skip_prefix(arg, opt, &arg)) {
565 if (!*arg) {
566 *value = NULL;
567 return 1;
569 if (*arg++ == '=') {
570 *value = arg;
571 return 1;
574 return 0;
577 static void handle_ref_opt(const char *pattern, const char *prefix)
579 if (pattern)
580 for_each_glob_ref_in(show_reference, pattern, prefix, NULL);
581 else
582 for_each_ref_in(prefix, show_reference, NULL);
583 clear_ref_exclusion(&ref_excludes);
586 enum format_type {
587 /* We would like a relative path. */
588 FORMAT_RELATIVE,
589 /* We would like a canonical absolute path. */
590 FORMAT_CANONICAL,
591 /* We would like the default behavior. */
592 FORMAT_DEFAULT,
595 enum default_type {
596 /* Our default is a relative path. */
597 DEFAULT_RELATIVE,
598 /* Our default is a relative path if there's a shared root. */
599 DEFAULT_RELATIVE_IF_SHARED,
600 /* Our default is a canonical absolute path. */
601 DEFAULT_CANONICAL,
602 /* Our default is not to modify the item. */
603 DEFAULT_UNMODIFIED,
606 static void print_path(const char *path, const char *prefix, enum format_type format, enum default_type def)
608 char *cwd = NULL;
610 * We don't ever produce a relative path if prefix is NULL, so set the
611 * prefix to the current directory so that we can produce a relative
612 * path whenever possible. If we're using RELATIVE_IF_SHARED mode, then
613 * we want an absolute path unless the two share a common prefix, so don't
614 * set it in that case, since doing so causes a relative path to always
615 * be produced if possible.
617 if (!prefix && (format != FORMAT_DEFAULT || def != DEFAULT_RELATIVE_IF_SHARED))
618 prefix = cwd = xgetcwd();
619 if (format == FORMAT_DEFAULT && def == DEFAULT_UNMODIFIED) {
620 puts(path);
621 } else if (format == FORMAT_RELATIVE ||
622 (format == FORMAT_DEFAULT && def == DEFAULT_RELATIVE)) {
624 * In order for relative_path to work as expected, we need to
625 * make sure that both paths are absolute paths. If we don't,
626 * we can end up with an unexpected absolute path that the user
627 * didn't want.
629 struct strbuf buf = STRBUF_INIT, realbuf = STRBUF_INIT, prefixbuf = STRBUF_INIT;
630 if (!is_absolute_path(path)) {
631 strbuf_realpath_forgiving(&realbuf, path, 1);
632 path = realbuf.buf;
634 if (!is_absolute_path(prefix)) {
635 strbuf_realpath_forgiving(&prefixbuf, prefix, 1);
636 prefix = prefixbuf.buf;
638 puts(relative_path(path, prefix, &buf));
639 strbuf_release(&buf);
640 strbuf_release(&realbuf);
641 strbuf_release(&prefixbuf);
642 } else if (format == FORMAT_DEFAULT && def == DEFAULT_RELATIVE_IF_SHARED) {
643 struct strbuf buf = STRBUF_INIT;
644 puts(relative_path(path, prefix, &buf));
645 strbuf_release(&buf);
646 } else {
647 struct strbuf buf = STRBUF_INIT;
648 strbuf_realpath_forgiving(&buf, path, 1);
649 puts(buf.buf);
650 strbuf_release(&buf);
652 free(cwd);
655 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
657 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
658 int did_repo_setup = 0;
659 int has_dashdash = 0;
660 int output_prefix = 0;
661 struct object_id oid;
662 unsigned int flags = 0;
663 const char *name = NULL;
664 struct object_context unused;
665 struct strbuf buf = STRBUF_INIT;
666 const int hexsz = the_hash_algo->hexsz;
667 int seen_end_of_options = 0;
668 enum format_type format = FORMAT_DEFAULT;
670 if (argc > 1 && !strcmp("--parseopt", argv[1]))
671 return cmd_parseopt(argc - 1, argv + 1, prefix);
673 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
674 return cmd_sq_quote(argc - 2, argv + 2);
676 if (argc > 1 && !strcmp("-h", argv[1]))
677 usage(builtin_rev_parse_usage);
679 for (i = 1; i < argc; i++) {
680 if (!strcmp(argv[i], "--")) {
681 has_dashdash = 1;
682 break;
686 /* No options; just report on whether we're in a git repo or not. */
687 if (argc == 1) {
688 setup_git_directory();
689 git_config(git_default_config, NULL);
690 return 0;
693 for (i = 1; i < argc; i++) {
694 const char *arg = argv[i];
696 if (as_is) {
697 if (show_file(arg, output_prefix) && as_is < 2)
698 verify_filename(prefix, arg, 0);
699 continue;
702 if (!seen_end_of_options) {
703 if (!strcmp(arg, "--local-env-vars")) {
704 int i;
705 for (i = 0; local_repo_env[i]; i++)
706 printf("%s\n", local_repo_env[i]);
707 continue;
709 if (!strcmp(arg, "--resolve-git-dir")) {
710 const char *gitdir = argv[++i];
711 if (!gitdir)
712 die("--resolve-git-dir requires an argument");
713 gitdir = resolve_gitdir(gitdir);
714 if (!gitdir)
715 die("not a gitdir '%s'", argv[i]);
716 puts(gitdir);
717 continue;
721 /* The rest of the options require a git repository. */
722 if (!did_repo_setup) {
723 prefix = setup_git_directory();
724 git_config(git_default_config, NULL);
725 did_repo_setup = 1;
728 if (!strcmp(arg, "--")) {
729 as_is = 2;
730 /* Pass on the "--" if we show anything but files.. */
731 if (filter & (DO_FLAGS | DO_REVS))
732 show_file(arg, 0);
733 continue;
736 if (!seen_end_of_options && *arg == '-') {
737 if (!strcmp(arg, "--git-path")) {
738 if (!argv[i + 1])
739 die("--git-path requires an argument");
740 strbuf_reset(&buf);
741 print_path(git_path("%s", argv[i + 1]), prefix,
742 format,
743 DEFAULT_RELATIVE_IF_SHARED);
744 i++;
745 continue;
747 if (!strcmp(arg,"-n")) {
748 if (++i >= argc)
749 die("-n requires an argument");
750 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
751 show(arg);
752 show(argv[i]);
754 continue;
756 if (starts_with(arg, "-n")) {
757 if ((filter & DO_FLAGS) && (filter & DO_REVS))
758 show(arg);
759 continue;
761 if (opt_with_value(arg, "--path-format", &arg)) {
762 if (!strcmp(arg, "absolute")) {
763 format = FORMAT_CANONICAL;
764 } else if (!strcmp(arg, "relative")) {
765 format = FORMAT_RELATIVE;
766 } else {
767 die("unknown argument to --path-format: %s", arg);
769 continue;
771 if (!strcmp(arg, "--default")) {
772 def = argv[++i];
773 if (!def)
774 die("--default requires an argument");
775 continue;
777 if (!strcmp(arg, "--prefix")) {
778 prefix = argv[++i];
779 if (!prefix)
780 die("--prefix requires an argument");
781 startup_info->prefix = prefix;
782 output_prefix = 1;
783 continue;
785 if (!strcmp(arg, "--revs-only")) {
786 filter &= ~DO_NOREV;
787 continue;
789 if (!strcmp(arg, "--no-revs")) {
790 filter &= ~DO_REVS;
791 continue;
793 if (!strcmp(arg, "--flags")) {
794 filter &= ~DO_NONFLAGS;
795 continue;
797 if (!strcmp(arg, "--no-flags")) {
798 filter &= ~DO_FLAGS;
799 continue;
801 if (!strcmp(arg, "--verify")) {
802 filter &= ~(DO_FLAGS|DO_NOREV);
803 verify = 1;
804 continue;
806 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
807 quiet = 1;
808 flags |= GET_OID_QUIETLY;
809 continue;
811 if (opt_with_value(arg, "--short", &arg)) {
812 filter &= ~(DO_FLAGS|DO_NOREV);
813 verify = 1;
814 abbrev = DEFAULT_ABBREV;
815 if (!arg)
816 continue;
817 abbrev = strtoul(arg, NULL, 10);
818 if (abbrev < MINIMUM_ABBREV)
819 abbrev = MINIMUM_ABBREV;
820 else if (hexsz <= abbrev)
821 abbrev = hexsz;
822 continue;
824 if (!strcmp(arg, "--sq")) {
825 output_sq = 1;
826 continue;
828 if (!strcmp(arg, "--not")) {
829 show_type ^= REVERSED;
830 continue;
832 if (!strcmp(arg, "--symbolic")) {
833 symbolic = SHOW_SYMBOLIC_ASIS;
834 continue;
836 if (!strcmp(arg, "--symbolic-full-name")) {
837 symbolic = SHOW_SYMBOLIC_FULL;
838 continue;
840 if (opt_with_value(arg, "--abbrev-ref", &arg)) {
841 abbrev_ref = 1;
842 abbrev_ref_strict = warn_ambiguous_refs;
843 if (arg) {
844 if (!strcmp(arg, "strict"))
845 abbrev_ref_strict = 1;
846 else if (!strcmp(arg, "loose"))
847 abbrev_ref_strict = 0;
848 else
849 die("unknown mode for --abbrev-ref: %s",
850 arg);
852 continue;
854 if (!strcmp(arg, "--all")) {
855 for_each_ref(show_reference, NULL);
856 clear_ref_exclusion(&ref_excludes);
857 continue;
859 if (skip_prefix(arg, "--disambiguate=", &arg)) {
860 for_each_abbrev(arg, show_abbrev, NULL);
861 continue;
863 if (!strcmp(arg, "--bisect")) {
864 for_each_fullref_in("refs/bisect/bad", show_reference, NULL, 0);
865 for_each_fullref_in("refs/bisect/good", anti_reference, NULL, 0);
866 continue;
868 if (opt_with_value(arg, "--branches", &arg)) {
869 handle_ref_opt(arg, "refs/heads/");
870 continue;
872 if (opt_with_value(arg, "--tags", &arg)) {
873 handle_ref_opt(arg, "refs/tags/");
874 continue;
876 if (skip_prefix(arg, "--glob=", &arg)) {
877 handle_ref_opt(arg, NULL);
878 continue;
880 if (opt_with_value(arg, "--remotes", &arg)) {
881 handle_ref_opt(arg, "refs/remotes/");
882 continue;
884 if (skip_prefix(arg, "--exclude=", &arg)) {
885 add_ref_exclusion(&ref_excludes, arg);
886 continue;
888 if (!strcmp(arg, "--show-toplevel")) {
889 const char *work_tree = get_git_work_tree();
890 if (work_tree)
891 print_path(work_tree, prefix, format, DEFAULT_UNMODIFIED);
892 else
893 die("this operation must be run in a work tree");
894 continue;
896 if (!strcmp(arg, "--show-superproject-working-tree")) {
897 struct strbuf superproject = STRBUF_INIT;
898 if (get_superproject_working_tree(&superproject))
899 print_path(superproject.buf, prefix, format, DEFAULT_UNMODIFIED);
900 strbuf_release(&superproject);
901 continue;
903 if (!strcmp(arg, "--show-prefix")) {
904 if (prefix)
905 puts(prefix);
906 else
907 putchar('\n');
908 continue;
910 if (!strcmp(arg, "--show-cdup")) {
911 const char *pfx = prefix;
912 if (!is_inside_work_tree()) {
913 const char *work_tree =
914 get_git_work_tree();
915 if (work_tree)
916 printf("%s\n", work_tree);
917 continue;
919 while (pfx) {
920 pfx = strchr(pfx, '/');
921 if (pfx) {
922 pfx++;
923 printf("../");
926 putchar('\n');
927 continue;
929 if (!strcmp(arg, "--git-dir") ||
930 !strcmp(arg, "--absolute-git-dir")) {
931 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
932 char *cwd;
933 int len;
934 enum format_type wanted = format;
935 if (arg[2] == 'g') { /* --git-dir */
936 if (gitdir) {
937 print_path(gitdir, prefix, format, DEFAULT_UNMODIFIED);
938 continue;
940 if (!prefix) {
941 print_path(".git", prefix, format, DEFAULT_UNMODIFIED);
942 continue;
944 } else { /* --absolute-git-dir */
945 wanted = FORMAT_CANONICAL;
946 if (!gitdir && !prefix)
947 gitdir = ".git";
948 if (gitdir) {
949 struct strbuf realpath = STRBUF_INIT;
950 strbuf_realpath(&realpath, gitdir, 1);
951 puts(realpath.buf);
952 strbuf_release(&realpath);
953 continue;
956 cwd = xgetcwd();
957 len = strlen(cwd);
958 strbuf_reset(&buf);
959 strbuf_addf(&buf, "%s%s.git", cwd, len && cwd[len-1] != '/' ? "/" : "");
960 free(cwd);
961 print_path(buf.buf, prefix, wanted, DEFAULT_CANONICAL);
962 continue;
964 if (!strcmp(arg, "--git-common-dir")) {
965 print_path(get_git_common_dir(), prefix, format, DEFAULT_RELATIVE_IF_SHARED);
966 continue;
968 if (!strcmp(arg, "--is-inside-git-dir")) {
969 printf("%s\n", is_inside_git_dir() ? "true"
970 : "false");
971 continue;
973 if (!strcmp(arg, "--is-inside-work-tree")) {
974 printf("%s\n", is_inside_work_tree() ? "true"
975 : "false");
976 continue;
978 if (!strcmp(arg, "--is-bare-repository")) {
979 printf("%s\n", is_bare_repository() ? "true"
980 : "false");
981 continue;
983 if (!strcmp(arg, "--is-shallow-repository")) {
984 printf("%s\n",
985 is_repository_shallow(the_repository) ? "true"
986 : "false");
987 continue;
989 if (!strcmp(arg, "--shared-index-path")) {
990 if (read_cache() < 0)
991 die(_("Could not read the index"));
992 if (the_index.split_index) {
993 const struct object_id *oid = &the_index.split_index->base_oid;
994 const char *path = git_path("sharedindex.%s", oid_to_hex(oid));
995 print_path(path, prefix, format, DEFAULT_RELATIVE);
997 continue;
999 if (skip_prefix(arg, "--since=", &arg)) {
1000 show_datestring("--max-age=", arg);
1001 continue;
1003 if (skip_prefix(arg, "--after=", &arg)) {
1004 show_datestring("--max-age=", arg);
1005 continue;
1007 if (skip_prefix(arg, "--before=", &arg)) {
1008 show_datestring("--min-age=", arg);
1009 continue;
1011 if (skip_prefix(arg, "--until=", &arg)) {
1012 show_datestring("--min-age=", arg);
1013 continue;
1015 if (opt_with_value(arg, "--show-object-format", &arg)) {
1016 const char *val = arg ? arg : "storage";
1018 if (strcmp(val, "storage") &&
1019 strcmp(val, "input") &&
1020 strcmp(val, "output"))
1021 die("unknown mode for --show-object-format: %s",
1022 arg);
1023 puts(the_hash_algo->name);
1024 continue;
1026 if (!strcmp(arg, "--end-of-options")) {
1027 seen_end_of_options = 1;
1028 if (filter & (DO_FLAGS | DO_REVS))
1029 show_file(arg, 0);
1030 continue;
1032 if (show_flag(arg) && verify)
1033 die_no_single_rev(quiet);
1034 continue;
1037 /* Not a flag argument */
1038 if (try_difference(arg))
1039 continue;
1040 if (try_parent_shorthands(arg))
1041 continue;
1042 name = arg;
1043 type = NORMAL;
1044 if (*arg == '^') {
1045 name++;
1046 type = REVERSED;
1048 if (!get_oid_with_context(the_repository, name,
1049 flags, &oid, &unused)) {
1050 if (verify)
1051 revs_count++;
1052 else
1053 show_rev(type, &oid, name);
1054 continue;
1056 if (verify)
1057 die_no_single_rev(quiet);
1058 if (has_dashdash)
1059 die("bad revision '%s'", arg);
1060 as_is = 1;
1061 if (!show_file(arg, output_prefix))
1062 continue;
1063 verify_filename(prefix, arg, 1);
1065 strbuf_release(&buf);
1066 if (verify) {
1067 if (revs_count == 1) {
1068 show_rev(type, &oid, name);
1069 return 0;
1070 } else if (revs_count == 0 && show_default())
1071 return 0;
1072 die_no_single_rev(quiet);
1073 } else
1074 show_default();
1075 return 0;