1/*
2 * rev-parse.c
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
7#include "commit.h"
8#include "refs.h"
9#include "quote.h"
10#include "builtin.h"
11#include "parse-options.h"
12#include "diff.h"
13#include "revision.h"
14#include "split-index.h"
15#include "submodule.h"
16#define DO_REVS 1
18#define DO_NOREV 2
19#define DO_FLAGS 4
20#define DO_NONFLAGS 8
21static int filter = ~0;
22static const char *def;
24#define NORMAL 0
26#define REVERSED 1
27static int show_type = NORMAL;
28#define SHOW_SYMBOLIC_ASIS 1
30#define SHOW_SYMBOLIC_FULL 2
31static int symbolic;
32static int abbrev;
33static int abbrev_ref;
34static int abbrev_ref_strict;
35static int output_sq;
36static int stuck_long;
38static struct string_list *ref_excludes;
39/*
41 * Some arguments are relevant "revision" arguments,
42 * others are about output format or other details.
43 * This sorts it all out.
44 */
45static int is_rev_argument(const char *arg)
46{
47 static const char *rev_args[] = {
48 "--all",
49 "--bisect",
50 "--dense",
51 "--branches=",
52 "--branches",
53 "--header",
54 "--ignore-missing",
55 "--max-age=",
56 "--max-count=",
57 "--min-age=",
58 "--no-merges",
59 "--min-parents=",
60 "--no-min-parents",
61 "--max-parents=",
62 "--no-max-parents",
63 "--objects",
64 "--objects-edge",
65 "--parents",
66 "--pretty",
67 "--remotes=",
68 "--remotes",
69 "--glob=",
70 "--sparse",
71 "--tags=",
72 "--tags",
73 "--topo-order",
74 "--date-order",
75 "--unpacked",
76 NULL
77 };
78 const char **p = rev_args;
79 /* accept -<digit>, like traditional "head" */
81 if ((*arg == '-') && isdigit(arg[1]))
82 return 1;
83 for (;;) {
85 const char *str = *p++;
86 int len;
87 if (!str)
88 return 0;
89 len = strlen(str);
90 if (!strcmp(arg, str) ||
91 (str[len-1] == '=' && !strncmp(arg, str, len)))
92 return 1;
93 }
94}
95/* Output argument as a string, either SQ or normal */
97static void show(const char *arg)
98{
99 if (output_sq) {
100 int sq = '\'', ch;
101 putchar(sq);
103 while ((ch = *arg++)) {
104 if (ch == sq)
105 fputs("'\\'", stdout);
106 putchar(ch);
107 }
108 putchar(sq);
109 putchar(' ');
110 }
111 else
112 puts(arg);
113}
114/* Like show(), but with a negation prefix according to type */
116static void show_with_type(int type, const char *arg)
117{
118 if (type != show_type)
119 putchar('^');
120 show(arg);
121}
122/* Output a revision, only if filter allows it */
124static void show_rev(int type, const struct object_id *oid, const char *name)
125{
126 if (!(filter & DO_REVS))
127 return;
128 def = NULL;
129 if ((symbolic || abbrev_ref) && name) {
131 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
132 struct object_id discard;
133 char *full;
134 switch (dwim_ref(name, strlen(name), discard.hash, &full)) {
136 case 0:
137 /*
138 * Not found -- not a ref. We could
139 * emit "name" here, but symbolic-full
140 * users are interested in finding the
141 * refs spelled in full, and they would
142 * need to filter non-refs if we did so.
143 */
144 break;
145 case 1: /* happy */
146 if (abbrev_ref)
147 full = shorten_unambiguous_ref(full,
148 abbrev_ref_strict);
149 show_with_type(type, full);
150 break;
151 default: /* ambiguous */
152 error("refname '%s' is ambiguous", name);
153 break;
154 }
155 free(full);
156 } else {
157 show_with_type(type, name);
158 }
159 }
160 else if (abbrev)
161 show_with_type(type, find_unique_abbrev(oid->hash, abbrev));
162 else
163 show_with_type(type, oid_to_hex(oid));
164}
165/* Output a flag, only if filter allows it. */
167static int show_flag(const char *arg)
168{
169 if (!(filter & DO_FLAGS))
170 return 0;
171 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
172 show(arg);
173 return 1;
174 }
175 return 0;
176}
177static int show_default(void)
179{
180 const char *s = def;
181 if (s) {
183 struct object_id oid;
184 def = NULL;
186 if (!get_oid(s, &oid)) {
187 show_rev(NORMAL, &oid, s);
188 return 1;
189 }
190 }
191 return 0;
192}
193static int show_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
195{
196 if (ref_excluded(ref_excludes, refname))
197 return 0;
198 show_rev(NORMAL, oid, refname);
199 return 0;
200}
201static int anti_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
203{
204 show_rev(REVERSED, oid, refname);
205 return 0;
206}
207static int show_abbrev(const struct object_id *oid, void *cb_data)
209{
210 show_rev(NORMAL, oid, NULL);
211 return 0;
212}
213static void show_datestring(const char *flag, const char *datestr)
215{
216 char *buffer;
217 /* date handling requires both flags and revs */
219 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
220 return;
221 buffer = xstrfmt("%s%lu", flag, approxidate(datestr));
222 show(buffer);
223 free(buffer);
224}
225static int show_file(const char *arg, int output_prefix)
227{
228 show_default();
229 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
230 if (output_prefix) {
231 const char *prefix = startup_info->prefix;
232 char *fname = prefix_filename(prefix, arg);
233 show(fname);
234 free(fname);
235 } else
236 show(arg);
237 return 1;
238 }
239 return 0;
240}
241static int try_difference(const char *arg)
243{
244 char *dotdot;
245 struct object_id oid;
246 struct object_id end;
247 const char *next;
248 const char *this;
249 int symmetric;
250 static const char head_by_default[] = "HEAD";
251 if (!(dotdot = strstr(arg, "..")))
253 return 0;
254 next = dotdot + 2;
255 this = arg;
256 symmetric = (*next == '.');
257 *dotdot = 0;
259 next += symmetric;
260 if (!*next)
262 next = head_by_default;
263 if (dotdot == arg)
264 this = head_by_default;
265 if (this == head_by_default && next == head_by_default &&
267 !symmetric) {
268 /*
269 * Just ".."? That is not a range but the
270 * pathspec for the parent directory.
271 */
272 *dotdot = '.';
273 return 0;
274 }
275 if (!get_sha1_committish(this, oid.hash) && !get_sha1_committish(next, end.hash)) {
277 show_rev(NORMAL, &end, next);
278 show_rev(symmetric ? NORMAL : REVERSED, &oid, this);
279 if (symmetric) {
280 struct commit_list *exclude;
281 struct commit *a, *b;
282 a = lookup_commit_reference(&oid);
283 b = lookup_commit_reference(&end);
284 exclude = get_merge_bases(a, b);
285 while (exclude) {
286 struct commit *commit = pop_commit(&exclude);
287 show_rev(REVERSED, &commit->object.oid, NULL);
288 }
289 }
290 *dotdot = '.';
291 return 1;
292 }
293 *dotdot = '.';
294 return 0;
295}
296static int try_parent_shorthands(const char *arg)
298{
299 char *dotdot;
300 struct object_id oid;
301 struct commit *commit;
302 struct commit_list *parents;
303 int parent_number;
304 int include_rev = 0;
305 int include_parents = 0;
306 int exclude_parent = 0;
307 if ((dotdot = strstr(arg, "^!"))) {
309 include_rev = 1;
310 if (dotdot[2])
311 return 0;
312 } else if ((dotdot = strstr(arg, "^@"))) {
313 include_parents = 1;
314 if (dotdot[2])
315 return 0;
316 } else if ((dotdot = strstr(arg, "^-"))) {
317 include_rev = 1;
318 exclude_parent = 1;
319 if (dotdot[2]) {
321 char *end;
322 exclude_parent = strtoul(dotdot + 2, &end, 10);
323 if (*end != '\0' || !exclude_parent)
324 return 0;
325 }
326 } else
327 return 0;
328 *dotdot = 0;
330 if (get_sha1_committish(arg, oid.hash)) {
331 *dotdot = '^';
332 return 0;
333 }
334 commit = lookup_commit_reference(&oid);
336 if (exclude_parent &&
337 exclude_parent > commit_list_count(commit->parents)) {
338 *dotdot = '^';
339 return 0;
340 }
341 if (include_rev)
343 show_rev(NORMAL, &oid, arg);
344 for (parents = commit->parents, parent_number = 1;
345 parents;
346 parents = parents->next, parent_number++) {
347 char *name = NULL;
348 if (exclude_parent && parent_number != exclude_parent)
350 continue;
351 if (symbolic)
353 name = xstrfmt("%s^%d", arg, parent_number);
354 show_rev(include_parents ? NORMAL : REVERSED,
355 &parents->item->object.oid, name);
356 free(name);
357 }
358 *dotdot = '^';
360 return 1;
361}
362static int parseopt_dump(const struct option *o, const char *arg, int unset)
364{
365 struct strbuf *parsed = o->value;
366 if (unset)
367 strbuf_addf(parsed, " --no-%s", o->long_name);
368 else if (o->short_name && (o->long_name == NULL || !stuck_long))
369 strbuf_addf(parsed, " -%c", o->short_name);
370 else
371 strbuf_addf(parsed, " --%s", o->long_name);
372 if (arg) {
373 if (!stuck_long)
374 strbuf_addch(parsed, ' ');
375 else if (o->long_name)
376 strbuf_addch(parsed, '=');
377 sq_quote_buf(parsed, arg);
378 }
379 return 0;
380}
381static const char *skipspaces(const char *s)
383{
384 while (isspace(*s))
385 s++;
386 return s;
387}
388static int cmd_parseopt(int argc, const char **argv, const char *prefix)
390{
391 static int keep_dashdash = 0, stop_at_non_option = 0;
392 static char const * const parseopt_usage[] = {
393 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
394 NULL
395 };
396 static struct option parseopt_opts[] = {
397 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
398 N_("keep the `--` passed as an arg")),
399 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
400 N_("stop parsing after the "
401 "first non-option argument")),
402 OPT_BOOL(0, "stuck-long", &stuck_long,
403 N_("output in stuck long form")),
404 OPT_END(),
405 };
406 static const char * const flag_chars = "*=?!";
407 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
409 const char **usage = NULL;
410 struct option *opts = NULL;
411 int onb = 0, osz = 0, unb = 0, usz = 0;
412 strbuf_addstr(&parsed, "set --");
414 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
415 PARSE_OPT_KEEP_DASHDASH);
416 if (argc < 1 || strcmp(argv[0], "--"))
417 usage_with_options(parseopt_usage, parseopt_opts);
418 /* get the usage up to the first line with a -- on it */
420 for (;;) {
421 if (strbuf_getline(&sb, stdin) == EOF)
422 die("premature end of input");
423 ALLOC_GROW(usage, unb + 1, usz);
424 if (!strcmp("--", sb.buf)) {
425 if (unb < 1)
426 die("no usage string given before the `--' separator");
427 usage[unb] = NULL;
428 break;
429 }
430 usage[unb++] = strbuf_detach(&sb, NULL);
431 }
432 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
434 while (strbuf_getline(&sb, stdin) != EOF) {
435 const char *s;
436 const char *help;
437 struct option *o;
438 if (!sb.len)
440 continue;
441 ALLOC_GROW(opts, onb + 1, osz);
443 memset(opts + onb, 0, sizeof(opts[onb]));
444 o = &opts[onb++];
446 help = strchr(sb.buf, ' ');
447 if (!help || *sb.buf == ' ') {
448 o->type = OPTION_GROUP;
449 o->help = xstrdup(skipspaces(sb.buf));
450 continue;
451 }
452 o->type = OPTION_CALLBACK;
454 o->help = xstrdup(skipspaces(help));
455 o->value = &parsed;
456 o->flags = PARSE_OPT_NOARG;
457 o->callback = &parseopt_dump;
458 /* name(s) */
460 s = strpbrk(sb.buf, flag_chars);
461 if (s == NULL)
462 s = help;
463 if (s - sb.buf == 1) /* short option only */
465 o->short_name = *sb.buf;
466 else if (sb.buf[1] != ',') /* long option only */
467 o->long_name = xmemdupz(sb.buf, s - sb.buf);
468 else {
469 o->short_name = *sb.buf;
470 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
471 }
472 /* flags */
474 while (s < help) {
475 switch (*s++) {
476 case '=':
477 o->flags &= ~PARSE_OPT_NOARG;
478 continue;
479 case '?':
480 o->flags &= ~PARSE_OPT_NOARG;
481 o->flags |= PARSE_OPT_OPTARG;
482 continue;
483 case '!':
484 o->flags |= PARSE_OPT_NONEG;
485 continue;
486 case '*':
487 o->flags |= PARSE_OPT_HIDDEN;
488 continue;
489 }
490 s--;
491 break;
492 }
493 if (s < help)
495 o->argh = xmemdupz(s, help - s);
496 }
497 strbuf_release(&sb);
498 /* put an OPT_END() */
500 ALLOC_GROW(opts, onb + 1, osz);
501 memset(opts + onb, 0, sizeof(opts[onb]));
502 argc = parse_options(argc, argv, prefix, opts, usage,
503 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
504 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
505 PARSE_OPT_SHELL_EVAL);
506 strbuf_addstr(&parsed, " --");
508 sq_quote_argv(&parsed, argv, 0);
509 puts(parsed.buf);
510 return 0;
511}
512static int cmd_sq_quote(int argc, const char **argv)
514{
515 struct strbuf buf = STRBUF_INIT;
516 if (argc)
518 sq_quote_argv(&buf, argv, 0);
519 printf("%s\n", buf.buf);
520 strbuf_release(&buf);
521 return 0;
523}
524static void die_no_single_rev(int quiet)
526{
527 if (quiet)
528 exit(1);
529 else
530 die("Needed a single revision");
531}
532static const char builtin_rev_parse_usage[] =
534N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
535 " or: git rev-parse --sq-quote [<arg>...]\n"
536 " or: git rev-parse [<options>] [<arg>...]\n"
537 "\n"
538 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
539/*
541 * Parse "opt" or "opt=<value>", setting value respectively to either
542 * NULL or the string after "=".
543 */
544static int opt_with_value(const char *arg, const char *opt, const char **value)
545{
546 if (skip_prefix(arg, opt, &arg)) {
547 if (!*arg) {
548 *value = NULL;
549 return 1;
550 }
551 if (*arg++ == '=') {
552 *value = arg;
553 return 1;
554 }
555 }
556 return 0;
557}
558static void handle_ref_opt(const char *pattern, const char *prefix)
560{
561 if (pattern)
562 for_each_glob_ref_in(show_reference, pattern, prefix, NULL);
563 else
564 for_each_ref_in(prefix, show_reference, NULL);
565 clear_ref_exclusion(&ref_excludes);
566}
567int cmd_rev_parse(int argc, const char **argv, const char *prefix)
569{
570 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
571 int did_repo_setup = 0;
572 int has_dashdash = 0;
573 int output_prefix = 0;
574 struct object_id oid;
575 unsigned int flags = 0;
576 const char *name = NULL;
577 struct object_context unused;
578 struct strbuf buf = STRBUF_INIT;
579 if (argc > 1 && !strcmp("--parseopt", argv[1]))
581 return cmd_parseopt(argc - 1, argv + 1, prefix);
582 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
584 return cmd_sq_quote(argc - 2, argv + 2);
585 if (argc > 1 && !strcmp("-h", argv[1]))
587 usage(builtin_rev_parse_usage);
588 for (i = 1; i < argc; i++) {
590 if (!strcmp(argv[i], "--")) {
591 has_dashdash = 1;
592 break;
593 }
594 }
595 /* No options; just report on whether we're in a git repo or not. */
597 if (argc == 1) {
598 setup_git_directory();
599 git_config(git_default_config, NULL);
600 return 0;
601 }
602 for (i = 1; i < argc; i++) {
604 const char *arg = argv[i];
605 if (!strcmp(arg, "--local-env-vars")) {
607 int i;
608 for (i = 0; local_repo_env[i]; i++)
609 printf("%s\n", local_repo_env[i]);
610 continue;
611 }
612 if (!strcmp(arg, "--resolve-git-dir")) {
613 const char *gitdir = argv[++i];
614 if (!gitdir)
615 die("--resolve-git-dir requires an argument");
616 gitdir = resolve_gitdir(gitdir);
617 if (!gitdir)
618 die("not a gitdir '%s'", argv[i]);
619 puts(gitdir);
620 continue;
621 }
622 /* The rest of the options require a git repository. */
624 if (!did_repo_setup) {
625 prefix = setup_git_directory();
626 git_config(git_default_config, NULL);
627 did_repo_setup = 1;
628 }
629 if (!strcmp(arg, "--git-path")) {
631 if (!argv[i + 1])
632 die("--git-path requires an argument");
633 strbuf_reset(&buf);
634 puts(relative_path(git_path("%s", argv[i + 1]),
635 prefix, &buf));
636 i++;
637 continue;
638 }
639 if (as_is) {
640 if (show_file(arg, output_prefix) && as_is < 2)
641 verify_filename(prefix, arg, 0);
642 continue;
643 }
644 if (!strcmp(arg,"-n")) {
645 if (++i >= argc)
646 die("-n requires an argument");
647 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
648 show(arg);
649 show(argv[i]);
650 }
651 continue;
652 }
653 if (starts_with(arg, "-n")) {
654 if ((filter & DO_FLAGS) && (filter & DO_REVS))
655 show(arg);
656 continue;
657 }
658 if (*arg == '-') {
660 if (!strcmp(arg, "--")) {
661 as_is = 2;
662 /* Pass on the "--" if we show anything but files.. */
663 if (filter & (DO_FLAGS | DO_REVS))
664 show_file(arg, 0);
665 continue;
666 }
667 if (!strcmp(arg, "--default")) {
668 def = argv[++i];
669 if (!def)
670 die("--default requires an argument");
671 continue;
672 }
673 if (!strcmp(arg, "--prefix")) {
674 prefix = argv[++i];
675 if (!prefix)
676 die("--prefix requires an argument");
677 startup_info->prefix = prefix;
678 output_prefix = 1;
679 continue;
680 }
681 if (!strcmp(arg, "--revs-only")) {
682 filter &= ~DO_NOREV;
683 continue;
684 }
685 if (!strcmp(arg, "--no-revs")) {
686 filter &= ~DO_REVS;
687 continue;
688 }
689 if (!strcmp(arg, "--flags")) {
690 filter &= ~DO_NONFLAGS;
691 continue;
692 }
693 if (!strcmp(arg, "--no-flags")) {
694 filter &= ~DO_FLAGS;
695 continue;
696 }
697 if (!strcmp(arg, "--verify")) {
698 filter &= ~(DO_FLAGS|DO_NOREV);
699 verify = 1;
700 continue;
701 }
702 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
703 quiet = 1;
704 flags |= GET_SHA1_QUIETLY;
705 continue;
706 }
707 if (opt_with_value(arg, "--short", &arg)) {
708 filter &= ~(DO_FLAGS|DO_NOREV);
709 verify = 1;
710 abbrev = DEFAULT_ABBREV;
711 if (!arg)
712 continue;
713 abbrev = strtoul(arg, NULL, 10);
714 if (abbrev < MINIMUM_ABBREV)
715 abbrev = MINIMUM_ABBREV;
716 else if (40 <= abbrev)
717 abbrev = 40;
718 continue;
719 }
720 if (!strcmp(arg, "--sq")) {
721 output_sq = 1;
722 continue;
723 }
724 if (!strcmp(arg, "--not")) {
725 show_type ^= REVERSED;
726 continue;
727 }
728 if (!strcmp(arg, "--symbolic")) {
729 symbolic = SHOW_SYMBOLIC_ASIS;
730 continue;
731 }
732 if (!strcmp(arg, "--symbolic-full-name")) {
733 symbolic = SHOW_SYMBOLIC_FULL;
734 continue;
735 }
736 if (opt_with_value(arg, "--abbrev-ref", &arg)) {
737 abbrev_ref = 1;
738 abbrev_ref_strict = warn_ambiguous_refs;
739 if (arg) {
740 if (!strcmp(arg, "strict"))
741 abbrev_ref_strict = 1;
742 else if (!strcmp(arg, "loose"))
743 abbrev_ref_strict = 0;
744 else
745 die("unknown mode for --abbrev-ref: %s",
746 arg);
747 }
748 continue;
749 }
750 if (!strcmp(arg, "--all")) {
751 for_each_ref(show_reference, NULL);
752 continue;
753 }
754 if (skip_prefix(arg, "--disambiguate=", &arg)) {
755 for_each_abbrev(arg, show_abbrev, NULL);
756 continue;
757 }
758 if (!strcmp(arg, "--bisect")) {
759 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
760 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
761 continue;
762 }
763 if (opt_with_value(arg, "--branches", &arg)) {
764 handle_ref_opt(arg, "refs/heads/");
765 continue;
766 }
767 if (opt_with_value(arg, "--tags", &arg)) {
768 handle_ref_opt(arg, "refs/tags/");
769 continue;
770 }
771 if (skip_prefix(arg, "--glob=", &arg)) {
772 handle_ref_opt(arg, NULL);
773 continue;
774 }
775 if (opt_with_value(arg, "--remotes", &arg)) {
776 handle_ref_opt(arg, "refs/remotes/");
777 continue;
778 }
779 if (skip_prefix(arg, "--exclude=", &arg)) {
780 add_ref_exclusion(&ref_excludes, arg);
781 continue;
782 }
783 if (!strcmp(arg, "--show-toplevel")) {
784 const char *work_tree = get_git_work_tree();
785 if (work_tree)
786 puts(work_tree);
787 continue;
788 }
789 if (!strcmp(arg, "--show-superproject-working-tree")) {
790 const char *superproject = get_superproject_working_tree();
791 if (superproject)
792 puts(superproject);
793 continue;
794 }
795 if (!strcmp(arg, "--show-prefix")) {
796 if (prefix)
797 puts(prefix);
798 else
799 putchar('\n');
800 continue;
801 }
802 if (!strcmp(arg, "--show-cdup")) {
803 const char *pfx = prefix;
804 if (!is_inside_work_tree()) {
805 const char *work_tree =
806 get_git_work_tree();
807 if (work_tree)
808 printf("%s\n", work_tree);
809 continue;
810 }
811 while (pfx) {
812 pfx = strchr(pfx, '/');
813 if (pfx) {
814 pfx++;
815 printf("../");
816 }
817 }
818 putchar('\n');
819 continue;
820 }
821 if (!strcmp(arg, "--git-dir") ||
822 !strcmp(arg, "--absolute-git-dir")) {
823 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
824 char *cwd;
825 int len;
826 if (arg[2] == 'g') { /* --git-dir */
827 if (gitdir) {
828 puts(gitdir);
829 continue;
830 }
831 if (!prefix) {
832 puts(".git");
833 continue;
834 }
835 } else { /* --absolute-git-dir */
836 if (!gitdir && !prefix)
837 gitdir = ".git";
838 if (gitdir) {
839 puts(real_path(gitdir));
840 continue;
841 }
842 }
843 cwd = xgetcwd();
844 len = strlen(cwd);
845 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
846 free(cwd);
847 continue;
848 }
849 if (!strcmp(arg, "--git-common-dir")) {
850 strbuf_reset(&buf);
851 puts(relative_path(get_git_common_dir(),
852 prefix, &buf));
853 continue;
854 }
855 if (!strcmp(arg, "--is-inside-git-dir")) {
856 printf("%s\n", is_inside_git_dir() ? "true"
857 : "false");
858 continue;
859 }
860 if (!strcmp(arg, "--is-inside-work-tree")) {
861 printf("%s\n", is_inside_work_tree() ? "true"
862 : "false");
863 continue;
864 }
865 if (!strcmp(arg, "--is-bare-repository")) {
866 printf("%s\n", is_bare_repository() ? "true"
867 : "false");
868 continue;
869 }
870 if (!strcmp(arg, "--shared-index-path")) {
871 if (read_cache() < 0)
872 die(_("Could not read the index"));
873 if (the_index.split_index) {
874 const unsigned char *sha1 = the_index.split_index->base_sha1;
875 const char *path = git_path("sharedindex.%s", sha1_to_hex(sha1));
876 strbuf_reset(&buf);
877 puts(relative_path(path, prefix, &buf));
878 }
879 continue;
880 }
881 if (skip_prefix(arg, "--since=", &arg)) {
882 show_datestring("--max-age=", arg);
883 continue;
884 }
885 if (skip_prefix(arg, "--after=", &arg)) {
886 show_datestring("--max-age=", arg);
887 continue;
888 }
889 if (skip_prefix(arg, "--before=", &arg)) {
890 show_datestring("--min-age=", arg);
891 continue;
892 }
893 if (skip_prefix(arg, "--until=", &arg)) {
894 show_datestring("--min-age=", arg);
895 continue;
896 }
897 if (show_flag(arg) && verify)
898 die_no_single_rev(quiet);
899 continue;
900 }
901 /* Not a flag argument */
903 if (try_difference(arg))
904 continue;
905 if (try_parent_shorthands(arg))
906 continue;
907 name = arg;
908 type = NORMAL;
909 if (*arg == '^') {
910 name++;
911 type = REVERSED;
912 }
913 if (!get_sha1_with_context(name, flags, oid.hash, &unused)) {
914 if (verify)
915 revs_count++;
916 else
917 show_rev(type, &oid, name);
918 continue;
919 }
920 if (verify)
921 die_no_single_rev(quiet);
922 if (has_dashdash)
923 die("bad revision '%s'", arg);
924 as_is = 1;
925 if (!show_file(arg, output_prefix))
926 continue;
927 verify_filename(prefix, arg, 1);
928 }
929 strbuf_release(&buf);
930 if (verify) {
931 if (revs_count == 1) {
932 show_rev(type, &oid, name);
933 return 0;
934 } else if (revs_count == 0 && show_default())
935 return 0;
936 die_no_single_rev(quiet);
937 } else
938 show_default();
939 return 0;
940}