a6a009152f706a559e34c1af41642c0466a4faf6
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#define DO_REVS 1
17#define DO_NOREV 2
18#define DO_FLAGS 4
19#define DO_NONFLAGS 8
20static int filter = ~0;
21static const char *def;
23#define NORMAL 0
25#define REVERSED 1
26static int show_type = NORMAL;
27#define SHOW_SYMBOLIC_ASIS 1
29#define SHOW_SYMBOLIC_FULL 2
30static int symbolic;
31static int abbrev;
32static int abbrev_ref;
33static int abbrev_ref_strict;
34static int output_sq;
35static int stuck_long;
37static struct string_list *ref_excludes;
38/*
40 * Some arguments are relevant "revision" arguments,
41 * others are about output format or other details.
42 * This sorts it all out.
43 */
44static int is_rev_argument(const char *arg)
45{
46 static const char *rev_args[] = {
47 "--all",
48 "--bisect",
49 "--dense",
50 "--branches=",
51 "--branches",
52 "--header",
53 "--ignore-missing",
54 "--max-age=",
55 "--max-count=",
56 "--min-age=",
57 "--no-merges",
58 "--min-parents=",
59 "--no-min-parents",
60 "--max-parents=",
61 "--no-max-parents",
62 "--objects",
63 "--objects-edge",
64 "--parents",
65 "--pretty",
66 "--remotes=",
67 "--remotes",
68 "--glob=",
69 "--sparse",
70 "--tags=",
71 "--tags",
72 "--topo-order",
73 "--date-order",
74 "--unpacked",
75 NULL
76 };
77 const char **p = rev_args;
78 /* accept -<digit>, like traditional "head" */
80 if ((*arg == '-') && isdigit(arg[1]))
81 return 1;
82 for (;;) {
84 const char *str = *p++;
85 int len;
86 if (!str)
87 return 0;
88 len = strlen(str);
89 if (!strcmp(arg, str) ||
90 (str[len-1] == '=' && !strncmp(arg, str, len)))
91 return 1;
92 }
93}
94/* Output argument as a string, either SQ or normal */
96static void show(const char *arg)
97{
98 if (output_sq) {
99 int sq = '\'', ch;
100 putchar(sq);
102 while ((ch = *arg++)) {
103 if (ch == sq)
104 fputs("'\\'", stdout);
105 putchar(ch);
106 }
107 putchar(sq);
108 putchar(' ');
109 }
110 else
111 puts(arg);
112}
113/* Like show(), but with a negation prefix according to type */
115static void show_with_type(int type, const char *arg)
116{
117 if (type != show_type)
118 putchar('^');
119 show(arg);
120}
121/* Output a revision, only if filter allows it */
123static void show_rev(int type, const unsigned char *sha1, const char *name)
124{
125 if (!(filter & DO_REVS))
126 return;
127 def = NULL;
128 if ((symbolic || abbrev_ref) && name) {
130 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
131 unsigned char discard[20];
132 char *full;
133 switch (dwim_ref(name, strlen(name), discard, &full)) {
135 case 0:
136 /*
137 * Not found -- not a ref. We could
138 * emit "name" here, but symbolic-full
139 * users are interested in finding the
140 * refs spelled in full, and they would
141 * need to filter non-refs if we did so.
142 */
143 break;
144 case 1: /* happy */
145 if (abbrev_ref)
146 full = shorten_unambiguous_ref(full,
147 abbrev_ref_strict);
148 show_with_type(type, full);
149 break;
150 default: /* ambiguous */
151 error("refname '%s' is ambiguous", name);
152 break;
153 }
154 free(full);
155 } else {
156 show_with_type(type, name);
157 }
158 }
159 else if (abbrev)
160 show_with_type(type, find_unique_abbrev(sha1, abbrev));
161 else
162 show_with_type(type, sha1_to_hex(sha1));
163}
164/* Output a flag, only if filter allows it. */
166static int show_flag(const char *arg)
167{
168 if (!(filter & DO_FLAGS))
169 return 0;
170 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
171 show(arg);
172 return 1;
173 }
174 return 0;
175}
176static int show_default(void)
178{
179 const char *s = def;
180 if (s) {
182 unsigned char sha1[20];
183 def = NULL;
185 if (!get_sha1(s, sha1)) {
186 show_rev(NORMAL, sha1, s);
187 return 1;
188 }
189 }
190 return 0;
191}
192static int show_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
194{
195 if (ref_excluded(ref_excludes, refname))
196 return 0;
197 show_rev(NORMAL, oid->hash, refname);
198 return 0;
199}
200static int anti_reference(const char *refname, const struct object_id *oid, int flag, void *cb_data)
202{
203 show_rev(REVERSED, oid->hash, refname);
204 return 0;
205}
206static int show_abbrev(const unsigned char *sha1, void *cb_data)
208{
209 show_rev(NORMAL, sha1, NULL);
210 return 0;
211}
212static void show_datestring(const char *flag, const char *datestr)
214{
215 static char buffer[100];
216 /* date handling requires both flags and revs */
218 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
219 return;
220 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
221 show(buffer);
222}
223static int show_file(const char *arg, int output_prefix)
225{
226 show_default();
227 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
228 if (output_prefix) {
229 const char *prefix = startup_info->prefix;
230 show(prefix_filename(prefix,
231 prefix ? strlen(prefix) : 0,
232 arg));
233 } else
234 show(arg);
235 return 1;
236 }
237 return 0;
238}
239static int try_difference(const char *arg)
241{
242 char *dotdot;
243 unsigned char sha1[20];
244 unsigned char end[20];
245 const char *next;
246 const char *this;
247 int symmetric;
248 static const char head_by_default[] = "HEAD";
249 if (!(dotdot = strstr(arg, "..")))
251 return 0;
252 next = dotdot + 2;
253 this = arg;
254 symmetric = (*next == '.');
255 *dotdot = 0;
257 next += symmetric;
258 if (!*next)
260 next = head_by_default;
261 if (dotdot == arg)
262 this = head_by_default;
263 if (this == head_by_default && next == head_by_default &&
265 !symmetric) {
266 /*
267 * Just ".."? That is not a range but the
268 * pathspec for the parent directory.
269 */
270 *dotdot = '.';
271 return 0;
272 }
273 if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
275 show_rev(NORMAL, end, next);
276 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
277 if (symmetric) {
278 struct commit_list *exclude;
279 struct commit *a, *b;
280 a = lookup_commit_reference(sha1);
281 b = lookup_commit_reference(end);
282 exclude = get_merge_bases(a, b);
283 while (exclude) {
284 struct commit *commit = pop_commit(&exclude);
285 show_rev(REVERSED, commit->object.oid.hash, NULL);
286 }
287 }
288 *dotdot = '.';
289 return 1;
290 }
291 *dotdot = '.';
292 return 0;
293}
294static int try_parent_shorthands(const char *arg)
296{
297 char *dotdot;
298 unsigned char sha1[20];
299 struct commit *commit;
300 struct commit_list *parents;
301 int parent_number;
302 int include_rev = 0;
303 int include_parents = 0;
304 int exclude_parent = 0;
305 if ((dotdot = strstr(arg, "^!"))) {
307 include_rev = 1;
308 if (dotdot[2])
309 return 0;
310 } else if ((dotdot = strstr(arg, "^@"))) {
311 include_parents = 1;
312 if (dotdot[2])
313 return 0;
314 } else if ((dotdot = strstr(arg, "^-"))) {
315 include_rev = 1;
316 exclude_parent = 1;
317 if (dotdot[2]) {
319 char *end;
320 exclude_parent = strtoul(dotdot + 2, &end, 10);
321 if (*end != '\0' || !exclude_parent)
322 return 0;
323 }
324 } else
325 return 0;
326 *dotdot = 0;
328 if (get_sha1_committish(arg, sha1)) {
329 *dotdot = '^';
330 return 0;
331 }
332 commit = lookup_commit_reference(sha1);
334 if (exclude_parent &&
335 exclude_parent > commit_list_count(commit->parents)) {
336 *dotdot = '^';
337 return 0;
338 }
339 if (include_rev)
341 show_rev(NORMAL, sha1, arg);
342 for (parents = commit->parents, parent_number = 1;
343 parents;
344 parents = parents->next, parent_number++) {
345 char *name = NULL;
346 if (exclude_parent && parent_number != exclude_parent)
348 continue;
349 if (symbolic)
351 name = xstrfmt("%s^%d", arg, parent_number);
352 show_rev(include_parents ? NORMAL : REVERSED,
353 parents->item->object.oid.hash, name);
354 free(name);
355 }
356 *dotdot = '^';
358 return 1;
359}
360static int parseopt_dump(const struct option *o, const char *arg, int unset)
362{
363 struct strbuf *parsed = o->value;
364 if (unset)
365 strbuf_addf(parsed, " --no-%s", o->long_name);
366 else if (o->short_name && (o->long_name == NULL || !stuck_long))
367 strbuf_addf(parsed, " -%c", o->short_name);
368 else
369 strbuf_addf(parsed, " --%s", o->long_name);
370 if (arg) {
371 if (!stuck_long)
372 strbuf_addch(parsed, ' ');
373 else if (o->long_name)
374 strbuf_addch(parsed, '=');
375 sq_quote_buf(parsed, arg);
376 }
377 return 0;
378}
379static const char *skipspaces(const char *s)
381{
382 while (isspace(*s))
383 s++;
384 return s;
385}
386static int cmd_parseopt(int argc, const char **argv, const char *prefix)
388{
389 static int keep_dashdash = 0, stop_at_non_option = 0;
390 static char const * const parseopt_usage[] = {
391 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
392 NULL
393 };
394 static struct option parseopt_opts[] = {
395 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
396 N_("keep the `--` passed as an arg")),
397 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
398 N_("stop parsing after the "
399 "first non-option argument")),
400 OPT_BOOL(0, "stuck-long", &stuck_long,
401 N_("output in stuck long form")),
402 OPT_END(),
403 };
404 static const char * const flag_chars = "*=?!";
405 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
407 const char **usage = NULL;
408 struct option *opts = NULL;
409 int onb = 0, osz = 0, unb = 0, usz = 0;
410 strbuf_addstr(&parsed, "set --");
412 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
413 PARSE_OPT_KEEP_DASHDASH);
414 if (argc < 1 || strcmp(argv[0], "--"))
415 usage_with_options(parseopt_usage, parseopt_opts);
416 /* get the usage up to the first line with a -- on it */
418 for (;;) {
419 if (strbuf_getline(&sb, stdin) == EOF)
420 die("premature end of input");
421 ALLOC_GROW(usage, unb + 1, usz);
422 if (!strcmp("--", sb.buf)) {
423 if (unb < 1)
424 die("no usage string given before the `--' separator");
425 usage[unb] = NULL;
426 break;
427 }
428 usage[unb++] = strbuf_detach(&sb, NULL);
429 }
430 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
432 while (strbuf_getline(&sb, stdin) != EOF) {
433 const char *s;
434 const char *help;
435 struct option *o;
436 if (!sb.len)
438 continue;
439 ALLOC_GROW(opts, onb + 1, osz);
441 memset(opts + onb, 0, sizeof(opts[onb]));
442 o = &opts[onb++];
444 help = strchr(sb.buf, ' ');
445 if (!help || *sb.buf == ' ') {
446 o->type = OPTION_GROUP;
447 o->help = xstrdup(skipspaces(sb.buf));
448 continue;
449 }
450 o->type = OPTION_CALLBACK;
452 o->help = xstrdup(skipspaces(help));
453 o->value = &parsed;
454 o->flags = PARSE_OPT_NOARG;
455 o->callback = &parseopt_dump;
456 /* name(s) */
458 s = strpbrk(sb.buf, flag_chars);
459 if (s == NULL)
460 s = help;
461 if (s - sb.buf == 1) /* short option only */
463 o->short_name = *sb.buf;
464 else if (sb.buf[1] != ',') /* long option only */
465 o->long_name = xmemdupz(sb.buf, s - sb.buf);
466 else {
467 o->short_name = *sb.buf;
468 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
469 }
470 /* flags */
472 while (s < help) {
473 switch (*s++) {
474 case '=':
475 o->flags &= ~PARSE_OPT_NOARG;
476 continue;
477 case '?':
478 o->flags &= ~PARSE_OPT_NOARG;
479 o->flags |= PARSE_OPT_OPTARG;
480 continue;
481 case '!':
482 o->flags |= PARSE_OPT_NONEG;
483 continue;
484 case '*':
485 o->flags |= PARSE_OPT_HIDDEN;
486 continue;
487 }
488 s--;
489 break;
490 }
491 if (s < help)
493 o->argh = xmemdupz(s, help - s);
494 }
495 strbuf_release(&sb);
496 /* put an OPT_END() */
498 ALLOC_GROW(opts, onb + 1, osz);
499 memset(opts + onb, 0, sizeof(opts[onb]));
500 argc = parse_options(argc, argv, prefix, opts, usage,
501 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
502 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
503 PARSE_OPT_SHELL_EVAL);
504 strbuf_addstr(&parsed, " --");
506 sq_quote_argv(&parsed, argv, 0);
507 puts(parsed.buf);
508 return 0;
509}
510static int cmd_sq_quote(int argc, const char **argv)
512{
513 struct strbuf buf = STRBUF_INIT;
514 if (argc)
516 sq_quote_argv(&buf, argv, 0);
517 printf("%s\n", buf.buf);
518 strbuf_release(&buf);
519 return 0;
521}
522static void die_no_single_rev(int quiet)
524{
525 if (quiet)
526 exit(1);
527 else
528 die("Needed a single revision");
529}
530static const char builtin_rev_parse_usage[] =
532N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
533 " or: git rev-parse --sq-quote [<arg>...]\n"
534 " or: git rev-parse [<options>] [<arg>...]\n"
535 "\n"
536 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
537/*
539 * Parse "opt" or "opt=<value>", setting value respectively to either
540 * NULL or the string after "=".
541 */
542static int opt_with_value(const char *arg, const char *opt, const char **value)
543{
544 if (skip_prefix(arg, opt, &arg)) {
545 if (!*arg) {
546 *value = NULL;
547 return 1;
548 }
549 if (*arg++ == '=') {
550 *value = arg;
551 return 1;
552 }
553 }
554 return 0;
555}
556int cmd_rev_parse(int argc, const char **argv, const char *prefix)
558{
559 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
560 int did_repo_setup = 0;
561 int has_dashdash = 0;
562 int output_prefix = 0;
563 unsigned char sha1[20];
564 unsigned int flags = 0;
565 const char *name = NULL;
566 struct object_context unused;
567 if (argc > 1 && !strcmp("--parseopt", argv[1]))
569 return cmd_parseopt(argc - 1, argv + 1, prefix);
570 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
572 return cmd_sq_quote(argc - 2, argv + 2);
573 if (argc > 1 && !strcmp("-h", argv[1]))
575 usage(builtin_rev_parse_usage);
576 for (i = 1; i < argc; i++) {
578 if (!strcmp(argv[i], "--")) {
579 has_dashdash = 1;
580 break;
581 }
582 }
583 /* No options; just report on whether we're in a git repo or not. */
585 if (argc == 1) {
586 setup_git_directory();
587 git_config(git_default_config, NULL);
588 return 0;
589 }
590 for (i = 1; i < argc; i++) {
592 const char *arg = argv[i];
593 if (!strcmp(arg, "--local-env-vars")) {
595 int i;
596 for (i = 0; local_repo_env[i]; i++)
597 printf("%s\n", local_repo_env[i]);
598 continue;
599 }
600 if (!strcmp(arg, "--resolve-git-dir")) {
601 const char *gitdir = argv[++i];
602 if (!gitdir)
603 die("--resolve-git-dir requires an argument");
604 gitdir = resolve_gitdir(gitdir);
605 if (!gitdir)
606 die("not a gitdir '%s'", argv[i]);
607 puts(gitdir);
608 continue;
609 }
610 /* The rest of the options require a git repository. */
612 if (!did_repo_setup) {
613 prefix = setup_git_directory();
614 git_config(git_default_config, NULL);
615 did_repo_setup = 1;
616 }
617 if (!strcmp(arg, "--git-path")) {
619 if (!argv[i + 1])
620 die("--git-path requires an argument");
621 puts(git_path("%s", argv[i + 1]));
622 i++;
623 continue;
624 }
625 if (as_is) {
626 if (show_file(arg, output_prefix) && as_is < 2)
627 verify_filename(prefix, arg, 0);
628 continue;
629 }
630 if (!strcmp(arg,"-n")) {
631 if (++i >= argc)
632 die("-n requires an argument");
633 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
634 show(arg);
635 show(argv[i]);
636 }
637 continue;
638 }
639 if (starts_with(arg, "-n")) {
640 if ((filter & DO_FLAGS) && (filter & DO_REVS))
641 show(arg);
642 continue;
643 }
644 if (*arg == '-') {
646 if (!strcmp(arg, "--")) {
647 as_is = 2;
648 /* Pass on the "--" if we show anything but files.. */
649 if (filter & (DO_FLAGS | DO_REVS))
650 show_file(arg, 0);
651 continue;
652 }
653 if (!strcmp(arg, "--default")) {
654 def = argv[++i];
655 if (!def)
656 die("--default requires an argument");
657 continue;
658 }
659 if (!strcmp(arg, "--prefix")) {
660 prefix = argv[++i];
661 if (!prefix)
662 die("--prefix requires an argument");
663 startup_info->prefix = prefix;
664 output_prefix = 1;
665 continue;
666 }
667 if (!strcmp(arg, "--revs-only")) {
668 filter &= ~DO_NOREV;
669 continue;
670 }
671 if (!strcmp(arg, "--no-revs")) {
672 filter &= ~DO_REVS;
673 continue;
674 }
675 if (!strcmp(arg, "--flags")) {
676 filter &= ~DO_NONFLAGS;
677 continue;
678 }
679 if (!strcmp(arg, "--no-flags")) {
680 filter &= ~DO_FLAGS;
681 continue;
682 }
683 if (!strcmp(arg, "--verify")) {
684 filter &= ~(DO_FLAGS|DO_NOREV);
685 verify = 1;
686 continue;
687 }
688 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
689 quiet = 1;
690 flags |= GET_SHA1_QUIETLY;
691 continue;
692 }
693 if (opt_with_value(arg, "--short", &arg)) {
694 filter &= ~(DO_FLAGS|DO_NOREV);
695 verify = 1;
696 abbrev = DEFAULT_ABBREV;
697 if (!arg)
698 continue;
699 abbrev = strtoul(arg, NULL, 10);
700 if (abbrev < MINIMUM_ABBREV)
701 abbrev = MINIMUM_ABBREV;
702 else if (40 <= abbrev)
703 abbrev = 40;
704 continue;
705 }
706 if (!strcmp(arg, "--sq")) {
707 output_sq = 1;
708 continue;
709 }
710 if (!strcmp(arg, "--not")) {
711 show_type ^= REVERSED;
712 continue;
713 }
714 if (!strcmp(arg, "--symbolic")) {
715 symbolic = SHOW_SYMBOLIC_ASIS;
716 continue;
717 }
718 if (!strcmp(arg, "--symbolic-full-name")) {
719 symbolic = SHOW_SYMBOLIC_FULL;
720 continue;
721 }
722 if (opt_with_value(arg, "--abbrev-ref", &arg)) {
723 abbrev_ref = 1;
724 abbrev_ref_strict = warn_ambiguous_refs;
725 if (arg) {
726 if (!strcmp(arg, "strict"))
727 abbrev_ref_strict = 1;
728 else if (!strcmp(arg, "loose"))
729 abbrev_ref_strict = 0;
730 else
731 die("unknown mode for --abbrev-ref: %s",
732 arg);
733 }
734 continue;
735 }
736 if (!strcmp(arg, "--all")) {
737 for_each_ref(show_reference, NULL);
738 continue;
739 }
740 if (skip_prefix(arg, "--disambiguate=", &arg)) {
741 for_each_abbrev(arg, show_abbrev, NULL);
742 continue;
743 }
744 if (!strcmp(arg, "--bisect")) {
745 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
746 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
747 continue;
748 }
749 if (skip_prefix(arg, "--branches=", &arg)) {
750 for_each_glob_ref_in(show_reference, arg,
751 "refs/heads/", NULL);
752 clear_ref_exclusion(&ref_excludes);
753 continue;
754 }
755 if (!strcmp(arg, "--branches")) {
756 for_each_branch_ref(show_reference, NULL);
757 clear_ref_exclusion(&ref_excludes);
758 continue;
759 }
760 if (skip_prefix(arg, "--tags=", &arg)) {
761 for_each_glob_ref_in(show_reference, arg,
762 "refs/tags/", NULL);
763 clear_ref_exclusion(&ref_excludes);
764 continue;
765 }
766 if (!strcmp(arg, "--tags")) {
767 for_each_tag_ref(show_reference, NULL);
768 clear_ref_exclusion(&ref_excludes);
769 continue;
770 }
771 if (skip_prefix(arg, "--glob=", &arg)) {
772 for_each_glob_ref(show_reference, arg, NULL);
773 clear_ref_exclusion(&ref_excludes);
774 continue;
775 }
776 if (skip_prefix(arg, "--remotes=", &arg)) {
777 for_each_glob_ref_in(show_reference, arg,
778 "refs/remotes/", NULL);
779 clear_ref_exclusion(&ref_excludes);
780 continue;
781 }
782 if (!strcmp(arg, "--remotes")) {
783 for_each_remote_ref(show_reference, NULL);
784 clear_ref_exclusion(&ref_excludes);
785 continue;
786 }
787 if (skip_prefix(arg, "--exclude=", &arg)) {
788 add_ref_exclusion(&ref_excludes, arg);
789 continue;
790 }
791 if (!strcmp(arg, "--show-toplevel")) {
792 const char *work_tree = get_git_work_tree();
793 if (work_tree)
794 puts(work_tree);
795 continue;
796 }
797 if (!strcmp(arg, "--show-prefix")) {
798 if (prefix)
799 puts(prefix);
800 else
801 putchar('\n');
802 continue;
803 }
804 if (!strcmp(arg, "--show-cdup")) {
805 const char *pfx = prefix;
806 if (!is_inside_work_tree()) {
807 const char *work_tree =
808 get_git_work_tree();
809 if (work_tree)
810 printf("%s\n", work_tree);
811 continue;
812 }
813 while (pfx) {
814 pfx = strchr(pfx, '/');
815 if (pfx) {
816 pfx++;
817 printf("../");
818 }
819 }
820 putchar('\n');
821 continue;
822 }
823 if (!strcmp(arg, "--git-dir")) {
824 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
825 char *cwd;
826 int len;
827 if (gitdir) {
828 puts(gitdir);
829 continue;
830 }
831 if (!prefix) {
832 puts(".git");
833 continue;
834 }
835 cwd = xgetcwd();
836 len = strlen(cwd);
837 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
838 free(cwd);
839 continue;
840 }
841 if (!strcmp(arg, "--git-common-dir")) {
842 const char *pfx = prefix ? prefix : "";
843 puts(prefix_filename(pfx, strlen(pfx), get_git_common_dir()));
844 continue;
845 }
846 if (!strcmp(arg, "--is-inside-git-dir")) {
847 printf("%s\n", is_inside_git_dir() ? "true"
848 : "false");
849 continue;
850 }
851 if (!strcmp(arg, "--is-inside-work-tree")) {
852 printf("%s\n", is_inside_work_tree() ? "true"
853 : "false");
854 continue;
855 }
856 if (!strcmp(arg, "--is-bare-repository")) {
857 printf("%s\n", is_bare_repository() ? "true"
858 : "false");
859 continue;
860 }
861 if (!strcmp(arg, "--shared-index-path")) {
862 if (read_cache() < 0)
863 die(_("Could not read the index"));
864 if (the_index.split_index) {
865 const unsigned char *sha1 = the_index.split_index->base_sha1;
866 puts(git_path("sharedindex.%s", sha1_to_hex(sha1)));
867 }
868 continue;
869 }
870 if (skip_prefix(arg, "--since=", &arg)) {
871 show_datestring("--max-age=", arg);
872 continue;
873 }
874 if (skip_prefix(arg, "--after=", &arg)) {
875 show_datestring("--max-age=", arg);
876 continue;
877 }
878 if (skip_prefix(arg, "--before=", &arg)) {
879 show_datestring("--min-age=", arg);
880 continue;
881 }
882 if (skip_prefix(arg, "--until=", &arg)) {
883 show_datestring("--min-age=", arg);
884 continue;
885 }
886 if (show_flag(arg) && verify)
887 die_no_single_rev(quiet);
888 continue;
889 }
890 /* Not a flag argument */
892 if (try_difference(arg))
893 continue;
894 if (try_parent_shorthands(arg))
895 continue;
896 name = arg;
897 type = NORMAL;
898 if (*arg == '^') {
899 name++;
900 type = REVERSED;
901 }
902 if (!get_sha1_with_context(name, flags, sha1, &unused)) {
903 if (verify)
904 revs_count++;
905 else
906 show_rev(type, sha1, name);
907 continue;
908 }
909 if (verify)
910 die_no_single_rev(quiet);
911 if (has_dashdash)
912 die("bad revision '%s'", arg);
913 as_is = 1;
914 if (!show_file(arg, output_prefix))
915 continue;
916 verify_filename(prefix, arg, 1);
917 }
918 if (verify) {
919 if (revs_count == 1) {
920 show_rev(type, sha1, name);
921 return 0;
922 } else if (revs_count == 0 && show_default())
923 return 0;
924 die_no_single_rev(quiet);
925 } else
926 show_default();
927 return 0;
928}