1/*
2 * rev-parse.c
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
7#include "config.h"
8#include "commit.h"
9#include "refs.h"
10#include "quote.h"
11#include "builtin.h"
12#include "parse-options.h"
13#include "diff.h"
14#include "revision.h"
15#include "split-index.h"
16#include "submodule.h"
17#define DO_REVS 1
19#define DO_NOREV 2
20#define DO_FLAGS 4
21#define DO_NONFLAGS 8
22static int filter = ~0;
23static const char *def;
25#define NORMAL 0
27#define REVERSED 1
28static int show_type = NORMAL;
29#define SHOW_SYMBOLIC_ASIS 1
31#define SHOW_SYMBOLIC_FULL 2
32static int symbolic;
33static int abbrev;
34static int abbrev_ref;
35static int abbrev_ref_strict;
36static int output_sq;
37static int stuck_long;
39static struct string_list *ref_excludes;
40/*
42 * Some arguments are relevant "revision" arguments,
43 * others are about output format or other details.
44 * This sorts it all out.
45 */
46static int is_rev_argument(const char *arg)
47{
48 static const char *rev_args[] = {
49 "--all",
50 "--bisect",
51 "--dense",
52 "--branches=",
53 "--branches",
54 "--header",
55 "--ignore-missing",
56 "--max-age=",
57 "--max-count=",
58 "--min-age=",
59 "--no-merges",
60 "--min-parents=",
61 "--no-min-parents",
62 "--max-parents=",
63 "--no-max-parents",
64 "--objects",
65 "--objects-edge",
66 "--parents",
67 "--pretty",
68 "--remotes=",
69 "--remotes",
70 "--glob=",
71 "--sparse",
72 "--tags=",
73 "--tags",
74 "--topo-order",
75 "--date-order",
76 "--unpacked",
77 NULL
78 };
79 const char **p = rev_args;
80 /* accept -<digit>, like traditional "head" */
82 if ((*arg == '-') && isdigit(arg[1]))
83 return 1;
84 for (;;) {
86 const char *str = *p++;
87 int len;
88 if (!str)
89 return 0;
90 len = strlen(str);
91 if (!strcmp(arg, str) ||
92 (str[len-1] == '=' && !strncmp(arg, str, len)))
93 return 1;
94 }
95}
96/* Output argument as a string, either SQ or normal */
98static void show(const char *arg)
99{
100 if (output_sq) {
101 int sq = '\'', ch;
102 putchar(sq);
104 while ((ch = *arg++)) {
105 if (ch == sq)
106 fputs("'\\'", stdout);
107 putchar(ch);
108 }
109 putchar(sq);
110 putchar(' ');
111 }
112 else
113 puts(arg);
114}
115/* Like show(), but with a negation prefix according to type */
117static void show_with_type(int type, const char *arg)
118{
119 if (type != show_type)
120 putchar('^');
121 show(arg);
122}
123/* Output a revision, only if filter allows it */
125static void show_rev(int type, const struct object_id *oid, const char *name)
126{
127 if (!(filter & DO_REVS))
128 return;
129 def = NULL;
130 if ((symbolic || abbrev_ref) && name) {
132 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
133 struct object_id discard;
134 char *full;
135 switch (dwim_ref(name, strlen(name), &discard, &full)) {
137 case 0:
138 /*
139 * Not found -- not a ref. We could
140 * emit "name" here, but symbolic-full
141 * users are interested in finding the
142 * refs spelled in full, and they would
143 * need to filter non-refs if we did so.
144 */
145 break;
146 case 1: /* happy */
147 if (abbrev_ref)
148 full = shorten_unambiguous_ref(full,
149 abbrev_ref_strict);
150 show_with_type(type, full);
151 break;
152 default: /* ambiguous */
153 error("refname '%s' is ambiguous", name);
154 break;
155 }
156 free(full);
157 } else {
158 show_with_type(type, name);
159 }
160 }
161 else if (abbrev)
162 show_with_type(type, find_unique_abbrev(oid->hash, abbrev));
163 else
164 show_with_type(type, oid_to_hex(oid));
165}
166/* Output a flag, only if filter allows it. */
168static int show_flag(const char *arg)
169{
170 if (!(filter & DO_FLAGS))
171 return 0;
172 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
173 show(arg);
174 return 1;
175 }
176 return 0;
177}
178static int show_default(void)
180{
181 const char *s = def;
182 if (s) {
184 struct object_id oid;
185 def = NULL;
187 if (!get_oid(s, &oid)) {
188 show_rev(NORMAL, &oid, s);
189 return 1;
190 }
191 }
192 return 0;
193}
194static int show_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
196{
197 if (ref_excluded(ref_excludes, refname))
198 return 0;
199 show_rev(NORMAL, oid, refname);
200 return 0;
201}
202static int anti_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
204{
205 show_rev(REVERSED, oid, refname);
206 return 0;
207}
208static int show_abbrev(const struct object_id *oid, void *cb_data)
210{
211 show_rev(NORMAL, oid, NULL);
212 return 0;
213}
214static void show_datestring(const char *flag, const char *datestr)
216{
217 char *buffer;
218 /* date handling requires both flags and revs */
220 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
221 return;
222 buffer = xstrfmt("%s%"PRItime, flag, approxidate(datestr));
223 show(buffer);
224 free(buffer);
225}
226static int show_file(const char *arg, int output_prefix)
228{
229 show_default();
230 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
231 if (output_prefix) {
232 const char *prefix = startup_info->prefix;
233 char *fname = prefix_filename(prefix, arg);
234 show(fname);
235 free(fname);
236 } else
237 show(arg);
238 return 1;
239 }
240 return 0;
241}
242static int try_difference(const char *arg)
244{
245 char *dotdot;
246 struct object_id oid;
247 struct object_id end;
248 const char *next;
249 const char *this;
250 int symmetric;
251 static const char head_by_default[] = "HEAD";
252 if (!(dotdot = strstr(arg, "..")))
254 return 0;
255 next = dotdot + 2;
256 this = arg;
257 symmetric = (*next == '.');
258 *dotdot = 0;
260 next += symmetric;
261 if (!*next)
263 next = head_by_default;
264 if (dotdot == arg)
265 this = head_by_default;
266 if (this == head_by_default && next == head_by_default &&
268 !symmetric) {
269 /*
270 * Just ".."? That is not a range but the
271 * pathspec for the parent directory.
272 */
273 *dotdot = '.';
274 return 0;
275 }
276 if (!get_oid_committish(this, &oid) && !get_oid_committish(next, &end)) {
278 show_rev(NORMAL, &end, next);
279 show_rev(symmetric ? NORMAL : REVERSED, &oid, this);
280 if (symmetric) {
281 struct commit_list *exclude;
282 struct commit *a, *b;
283 a = lookup_commit_reference(&oid);
284 b = lookup_commit_reference(&end);
285 exclude = get_merge_bases(a, b);
286 while (exclude) {
287 struct commit *commit = pop_commit(&exclude);
288 show_rev(REVERSED, &commit->object.oid, NULL);
289 }
290 }
291 *dotdot = '.';
292 return 1;
293 }
294 *dotdot = '.';
295 return 0;
296}
297static int try_parent_shorthands(const char *arg)
299{
300 char *dotdot;
301 struct object_id oid;
302 struct commit *commit;
303 struct commit_list *parents;
304 int parent_number;
305 int include_rev = 0;
306 int include_parents = 0;
307 int exclude_parent = 0;
308 if ((dotdot = strstr(arg, "^!"))) {
310 include_rev = 1;
311 if (dotdot[2])
312 return 0;
313 } else if ((dotdot = strstr(arg, "^@"))) {
314 include_parents = 1;
315 if (dotdot[2])
316 return 0;
317 } else if ((dotdot = strstr(arg, "^-"))) {
318 include_rev = 1;
319 exclude_parent = 1;
320 if (dotdot[2]) {
322 char *end;
323 exclude_parent = strtoul(dotdot + 2, &end, 10);
324 if (*end != '\0' || !exclude_parent)
325 return 0;
326 }
327 } else
328 return 0;
329 *dotdot = 0;
331 if (get_oid_committish(arg, &oid)) {
332 *dotdot = '^';
333 return 0;
334 }
335 commit = lookup_commit_reference(&oid);
337 if (exclude_parent &&
338 exclude_parent > commit_list_count(commit->parents)) {
339 *dotdot = '^';
340 return 0;
341 }
342 if (include_rev)
344 show_rev(NORMAL, &oid, arg);
345 for (parents = commit->parents, parent_number = 1;
346 parents;
347 parents = parents->next, parent_number++) {
348 char *name = NULL;
349 if (exclude_parent && parent_number != exclude_parent)
351 continue;
352 if (symbolic)
354 name = xstrfmt("%s^%d", arg, parent_number);
355 show_rev(include_parents ? NORMAL : REVERSED,
356 &parents->item->object.oid, name);
357 free(name);
358 }
359 *dotdot = '^';
361 return 1;
362}
363static int parseopt_dump(const struct option *o, const char *arg, int unset)
365{
366 struct strbuf *parsed = o->value;
367 if (unset)
368 strbuf_addf(parsed, " --no-%s", o->long_name);
369 else if (o->short_name && (o->long_name == NULL || !stuck_long))
370 strbuf_addf(parsed, " -%c", o->short_name);
371 else
372 strbuf_addf(parsed, " --%s", o->long_name);
373 if (arg) {
374 if (!stuck_long)
375 strbuf_addch(parsed, ' ');
376 else if (o->long_name)
377 strbuf_addch(parsed, '=');
378 sq_quote_buf(parsed, arg);
379 }
380 return 0;
381}
382static const char *skipspaces(const char *s)
384{
385 while (isspace(*s))
386 s++;
387 return s;
388}
389static char *findspace(const char *s)
391{
392 for (; *s; s++)
393 if (isspace(*s))
394 return (char*)s;
395 return NULL;
396}
397static int cmd_parseopt(int argc, const char **argv, const char *prefix)
399{
400 static int keep_dashdash = 0, stop_at_non_option = 0;
401 static char const * const parseopt_usage[] = {
402 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
403 NULL
404 };
405 static struct option parseopt_opts[] = {
406 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
407 N_("keep the `--` passed as an arg")),
408 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
409 N_("stop parsing after the "
410 "first non-option argument")),
411 OPT_BOOL(0, "stuck-long", &stuck_long,
412 N_("output in stuck long form")),
413 OPT_END(),
414 };
415 static const char * const flag_chars = "*=?!";
416 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
418 const char **usage = NULL;
419 struct option *opts = NULL;
420 int onb = 0, osz = 0, unb = 0, usz = 0;
421 strbuf_addstr(&parsed, "set --");
423 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
424 PARSE_OPT_KEEP_DASHDASH);
425 if (argc < 1 || strcmp(argv[0], "--"))
426 usage_with_options(parseopt_usage, parseopt_opts);
427 /* get the usage up to the first line with a -- on it */
429 for (;;) {
430 if (strbuf_getline(&sb, stdin) == EOF)
431 die("premature end of input");
432 ALLOC_GROW(usage, unb + 1, usz);
433 if (!strcmp("--", sb.buf)) {
434 if (unb < 1)
435 die("no usage string given before the `--' separator");
436 usage[unb] = NULL;
437 break;
438 }
439 usage[unb++] = strbuf_detach(&sb, NULL);
440 }
441 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
443 while (strbuf_getline(&sb, stdin) != EOF) {
444 const char *s;
445 char *help;
446 struct option *o;
447 if (!sb.len)
449 continue;
450 ALLOC_GROW(opts, onb + 1, osz);
452 memset(opts + onb, 0, sizeof(opts[onb]));
453 o = &opts[onb++];
455 help = findspace(sb.buf);
456 if (!help || sb.buf == help) {
457 o->type = OPTION_GROUP;
458 o->help = xstrdup(skipspaces(sb.buf));
459 continue;
460 }
461 *help = '\0';
463 o->type = OPTION_CALLBACK;
465 o->help = xstrdup(skipspaces(help+1));
466 o->value = &parsed;
467 o->flags = PARSE_OPT_NOARG;
468 o->callback = &parseopt_dump;
469 /* name(s) */
471 s = strpbrk(sb.buf, flag_chars);
472 if (s == NULL)
473 s = help;
474 if (s - sb.buf == 1) /* short option only */
476 o->short_name = *sb.buf;
477 else if (sb.buf[1] != ',') /* long option only */
478 o->long_name = xmemdupz(sb.buf, s - sb.buf);
479 else {
480 o->short_name = *sb.buf;
481 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
482 }
483 /* flags */
485 while (s < help) {
486 switch (*s++) {
487 case '=':
488 o->flags &= ~PARSE_OPT_NOARG;
489 continue;
490 case '?':
491 o->flags &= ~PARSE_OPT_NOARG;
492 o->flags |= PARSE_OPT_OPTARG;
493 continue;
494 case '!':
495 o->flags |= PARSE_OPT_NONEG;
496 continue;
497 case '*':
498 o->flags |= PARSE_OPT_HIDDEN;
499 continue;
500 }
501 s--;
502 break;
503 }
504 if (s < help)
506 o->argh = xmemdupz(s, help - s);
507 }
508 strbuf_release(&sb);
509 /* put an OPT_END() */
511 ALLOC_GROW(opts, onb + 1, osz);
512 memset(opts + onb, 0, sizeof(opts[onb]));
513 argc = parse_options(argc, argv, prefix, opts, usage,
514 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
515 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
516 PARSE_OPT_SHELL_EVAL);
517 strbuf_addstr(&parsed, " --");
519 sq_quote_argv(&parsed, argv, 0);
520 puts(parsed.buf);
521 return 0;
522}
523static int cmd_sq_quote(int argc, const char **argv)
525{
526 struct strbuf buf = STRBUF_INIT;
527 if (argc)
529 sq_quote_argv(&buf, argv, 0);
530 printf("%s\n", buf.buf);
531 strbuf_release(&buf);
532 return 0;
534}
535static void die_no_single_rev(int quiet)
537{
538 if (quiet)
539 exit(1);
540 else
541 die("Needed a single revision");
542}
543static const char builtin_rev_parse_usage[] =
545N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
546 " or: git rev-parse --sq-quote [<arg>...]\n"
547 " or: git rev-parse [<options>] [<arg>...]\n"
548 "\n"
549 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
550/*
552 * Parse "opt" or "opt=<value>", setting value respectively to either
553 * NULL or the string after "=".
554 */
555static int opt_with_value(const char *arg, const char *opt, const char **value)
556{
557 if (skip_prefix(arg, opt, &arg)) {
558 if (!*arg) {
559 *value = NULL;
560 return 1;
561 }
562 if (*arg++ == '=') {
563 *value = arg;
564 return 1;
565 }
566 }
567 return 0;
568}
569static void handle_ref_opt(const char *pattern, const char *prefix)
571{
572 if (pattern)
573 for_each_glob_ref_in(show_reference, pattern, prefix, NULL);
574 else
575 for_each_ref_in(prefix, show_reference, NULL);
576 clear_ref_exclusion(&ref_excludes);
577}
578int cmd_rev_parse(int argc, const char **argv, const char *prefix)
580{
581 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
582 int did_repo_setup = 0;
583 int has_dashdash = 0;
584 int output_prefix = 0;
585 struct object_id oid;
586 unsigned int flags = 0;
587 const char *name = NULL;
588 struct object_context unused;
589 struct strbuf buf = STRBUF_INIT;
590 if (argc > 1 && !strcmp("--parseopt", argv[1]))
592 return cmd_parseopt(argc - 1, argv + 1, prefix);
593 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
595 return cmd_sq_quote(argc - 2, argv + 2);
596 if (argc > 1 && !strcmp("-h", argv[1]))
598 usage(builtin_rev_parse_usage);
599 for (i = 1; i < argc; i++) {
601 if (!strcmp(argv[i], "--")) {
602 has_dashdash = 1;
603 break;
604 }
605 }
606 /* No options; just report on whether we're in a git repo or not. */
608 if (argc == 1) {
609 setup_git_directory();
610 git_config(git_default_config, NULL);
611 return 0;
612 }
613 for (i = 1; i < argc; i++) {
615 const char *arg = argv[i];
616 if (!strcmp(arg, "--local-env-vars")) {
618 int i;
619 for (i = 0; local_repo_env[i]; i++)
620 printf("%s\n", local_repo_env[i]);
621 continue;
622 }
623 if (!strcmp(arg, "--resolve-git-dir")) {
624 const char *gitdir = argv[++i];
625 if (!gitdir)
626 die("--resolve-git-dir requires an argument");
627 gitdir = resolve_gitdir(gitdir);
628 if (!gitdir)
629 die("not a gitdir '%s'", argv[i]);
630 puts(gitdir);
631 continue;
632 }
633 /* The rest of the options require a git repository. */
635 if (!did_repo_setup) {
636 prefix = setup_git_directory();
637 git_config(git_default_config, NULL);
638 did_repo_setup = 1;
639 }
640 if (!strcmp(arg, "--git-path")) {
642 if (!argv[i + 1])
643 die("--git-path requires an argument");
644 strbuf_reset(&buf);
645 puts(relative_path(git_path("%s", argv[i + 1]),
646 prefix, &buf));
647 i++;
648 continue;
649 }
650 if (as_is) {
651 if (show_file(arg, output_prefix) && as_is < 2)
652 verify_filename(prefix, arg, 0);
653 continue;
654 }
655 if (!strcmp(arg,"-n")) {
656 if (++i >= argc)
657 die("-n requires an argument");
658 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
659 show(arg);
660 show(argv[i]);
661 }
662 continue;
663 }
664 if (starts_with(arg, "-n")) {
665 if ((filter & DO_FLAGS) && (filter & DO_REVS))
666 show(arg);
667 continue;
668 }
669 if (*arg == '-') {
671 if (!strcmp(arg, "--")) {
672 as_is = 2;
673 /* Pass on the "--" if we show anything but files.. */
674 if (filter & (DO_FLAGS | DO_REVS))
675 show_file(arg, 0);
676 continue;
677 }
678 if (!strcmp(arg, "--default")) {
679 def = argv[++i];
680 if (!def)
681 die("--default requires an argument");
682 continue;
683 }
684 if (!strcmp(arg, "--prefix")) {
685 prefix = argv[++i];
686 if (!prefix)
687 die("--prefix requires an argument");
688 startup_info->prefix = prefix;
689 output_prefix = 1;
690 continue;
691 }
692 if (!strcmp(arg, "--revs-only")) {
693 filter &= ~DO_NOREV;
694 continue;
695 }
696 if (!strcmp(arg, "--no-revs")) {
697 filter &= ~DO_REVS;
698 continue;
699 }
700 if (!strcmp(arg, "--flags")) {
701 filter &= ~DO_NONFLAGS;
702 continue;
703 }
704 if (!strcmp(arg, "--no-flags")) {
705 filter &= ~DO_FLAGS;
706 continue;
707 }
708 if (!strcmp(arg, "--verify")) {
709 filter &= ~(DO_FLAGS|DO_NOREV);
710 verify = 1;
711 continue;
712 }
713 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
714 quiet = 1;
715 flags |= GET_OID_QUIETLY;
716 continue;
717 }
718 if (opt_with_value(arg, "--short", &arg)) {
719 filter &= ~(DO_FLAGS|DO_NOREV);
720 verify = 1;
721 abbrev = DEFAULT_ABBREV;
722 if (!arg)
723 continue;
724 abbrev = strtoul(arg, NULL, 10);
725 if (abbrev < MINIMUM_ABBREV)
726 abbrev = MINIMUM_ABBREV;
727 else if (40 <= abbrev)
728 abbrev = 40;
729 continue;
730 }
731 if (!strcmp(arg, "--sq")) {
732 output_sq = 1;
733 continue;
734 }
735 if (!strcmp(arg, "--not")) {
736 show_type ^= REVERSED;
737 continue;
738 }
739 if (!strcmp(arg, "--symbolic")) {
740 symbolic = SHOW_SYMBOLIC_ASIS;
741 continue;
742 }
743 if (!strcmp(arg, "--symbolic-full-name")) {
744 symbolic = SHOW_SYMBOLIC_FULL;
745 continue;
746 }
747 if (opt_with_value(arg, "--abbrev-ref", &arg)) {
748 abbrev_ref = 1;
749 abbrev_ref_strict = warn_ambiguous_refs;
750 if (arg) {
751 if (!strcmp(arg, "strict"))
752 abbrev_ref_strict = 1;
753 else if (!strcmp(arg, "loose"))
754 abbrev_ref_strict = 0;
755 else
756 die("unknown mode for --abbrev-ref: %s",
757 arg);
758 }
759 continue;
760 }
761 if (!strcmp(arg, "--all")) {
762 for_each_ref(show_reference, NULL);
763 continue;
764 }
765 if (skip_prefix(arg, "--disambiguate=", &arg)) {
766 for_each_abbrev(arg, show_abbrev, NULL);
767 continue;
768 }
769 if (!strcmp(arg, "--bisect")) {
770 for_each_fullref_in("refs/bisect/bad", show_reference, NULL, 0);
771 for_each_fullref_in("refs/bisect/good", anti_reference, NULL, 0);
772 continue;
773 }
774 if (opt_with_value(arg, "--branches", &arg)) {
775 handle_ref_opt(arg, "refs/heads/");
776 continue;
777 }
778 if (opt_with_value(arg, "--tags", &arg)) {
779 handle_ref_opt(arg, "refs/tags/");
780 continue;
781 }
782 if (skip_prefix(arg, "--glob=", &arg)) {
783 handle_ref_opt(arg, NULL);
784 continue;
785 }
786 if (opt_with_value(arg, "--remotes", &arg)) {
787 handle_ref_opt(arg, "refs/remotes/");
788 continue;
789 }
790 if (skip_prefix(arg, "--exclude=", &arg)) {
791 add_ref_exclusion(&ref_excludes, arg);
792 continue;
793 }
794 if (!strcmp(arg, "--show-toplevel")) {
795 const char *work_tree = get_git_work_tree();
796 if (work_tree)
797 puts(work_tree);
798 continue;
799 }
800 if (!strcmp(arg, "--show-superproject-working-tree")) {
801 const char *superproject = get_superproject_working_tree();
802 if (superproject)
803 puts(superproject);
804 continue;
805 }
806 if (!strcmp(arg, "--show-prefix")) {
807 if (prefix)
808 puts(prefix);
809 else
810 putchar('\n');
811 continue;
812 }
813 if (!strcmp(arg, "--show-cdup")) {
814 const char *pfx = prefix;
815 if (!is_inside_work_tree()) {
816 const char *work_tree =
817 get_git_work_tree();
818 if (work_tree)
819 printf("%s\n", work_tree);
820 continue;
821 }
822 while (pfx) {
823 pfx = strchr(pfx, '/');
824 if (pfx) {
825 pfx++;
826 printf("../");
827 }
828 }
829 putchar('\n');
830 continue;
831 }
832 if (!strcmp(arg, "--git-dir") ||
833 !strcmp(arg, "--absolute-git-dir")) {
834 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
835 char *cwd;
836 int len;
837 if (arg[2] == 'g') { /* --git-dir */
838 if (gitdir) {
839 puts(gitdir);
840 continue;
841 }
842 if (!prefix) {
843 puts(".git");
844 continue;
845 }
846 } else { /* --absolute-git-dir */
847 if (!gitdir && !prefix)
848 gitdir = ".git";
849 if (gitdir) {
850 puts(real_path(gitdir));
851 continue;
852 }
853 }
854 cwd = xgetcwd();
855 len = strlen(cwd);
856 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
857 free(cwd);
858 continue;
859 }
860 if (!strcmp(arg, "--git-common-dir")) {
861 strbuf_reset(&buf);
862 puts(relative_path(get_git_common_dir(),
863 prefix, &buf));
864 continue;
865 }
866 if (!strcmp(arg, "--is-inside-git-dir")) {
867 printf("%s\n", is_inside_git_dir() ? "true"
868 : "false");
869 continue;
870 }
871 if (!strcmp(arg, "--is-inside-work-tree")) {
872 printf("%s\n", is_inside_work_tree() ? "true"
873 : "false");
874 continue;
875 }
876 if (!strcmp(arg, "--is-bare-repository")) {
877 printf("%s\n", is_bare_repository() ? "true"
878 : "false");
879 continue;
880 }
881 if (!strcmp(arg, "--is-shallow-repository")) {
882 printf("%s\n", is_repository_shallow() ? "true"
883 : "false");
884 continue;
885 }
886 if (!strcmp(arg, "--shared-index-path")) {
887 if (read_cache() < 0)
888 die(_("Could not read the index"));
889 if (the_index.split_index) {
890 const unsigned char *sha1 = the_index.split_index->base_sha1;
891 const char *path = git_path("sharedindex.%s", sha1_to_hex(sha1));
892 strbuf_reset(&buf);
893 puts(relative_path(path, prefix, &buf));
894 }
895 continue;
896 }
897 if (skip_prefix(arg, "--since=", &arg)) {
898 show_datestring("--max-age=", arg);
899 continue;
900 }
901 if (skip_prefix(arg, "--after=", &arg)) {
902 show_datestring("--max-age=", arg);
903 continue;
904 }
905 if (skip_prefix(arg, "--before=", &arg)) {
906 show_datestring("--min-age=", arg);
907 continue;
908 }
909 if (skip_prefix(arg, "--until=", &arg)) {
910 show_datestring("--min-age=", arg);
911 continue;
912 }
913 if (show_flag(arg) && verify)
914 die_no_single_rev(quiet);
915 continue;
916 }
917 /* Not a flag argument */
919 if (try_difference(arg))
920 continue;
921 if (try_parent_shorthands(arg))
922 continue;
923 name = arg;
924 type = NORMAL;
925 if (*arg == '^') {
926 name++;
927 type = REVERSED;
928 }
929 if (!get_oid_with_context(name, flags, &oid, &unused)) {
930 if (verify)
931 revs_count++;
932 else
933 show_rev(type, &oid, name);
934 continue;
935 }
936 if (verify)
937 die_no_single_rev(quiet);
938 if (has_dashdash)
939 die("bad revision '%s'", arg);
940 as_is = 1;
941 if (!show_file(arg, output_prefix))
942 continue;
943 verify_filename(prefix, arg, 1);
944 }
945 strbuf_release(&buf);
946 if (verify) {
947 if (revs_count == 1) {
948 show_rev(type, &oid, name);
949 return 0;
950 } else if (revs_count == 0 && show_default())
951 return 0;
952 die_no_single_rev(quiet);
953 } else
954 show_default();
955 return 0;
956}