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 if (exclude_parent && parent_number != exclude_parent)
346 continue;
347 show_rev(include_parents ? NORMAL : REVERSED,
349 parents->item->object.oid.hash, arg);
350 }
351 *dotdot = '^';
353 return 1;
354}
355static int parseopt_dump(const struct option *o, const char *arg, int unset)
357{
358 struct strbuf *parsed = o->value;
359 if (unset)
360 strbuf_addf(parsed, " --no-%s", o->long_name);
361 else if (o->short_name && (o->long_name == NULL || !stuck_long))
362 strbuf_addf(parsed, " -%c", o->short_name);
363 else
364 strbuf_addf(parsed, " --%s", o->long_name);
365 if (arg) {
366 if (!stuck_long)
367 strbuf_addch(parsed, ' ');
368 else if (o->long_name)
369 strbuf_addch(parsed, '=');
370 sq_quote_buf(parsed, arg);
371 }
372 return 0;
373}
374static const char *skipspaces(const char *s)
376{
377 while (isspace(*s))
378 s++;
379 return s;
380}
381static int cmd_parseopt(int argc, const char **argv, const char *prefix)
383{
384 static int keep_dashdash = 0, stop_at_non_option = 0;
385 static char const * const parseopt_usage[] = {
386 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
387 NULL
388 };
389 static struct option parseopt_opts[] = {
390 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
391 N_("keep the `--` passed as an arg")),
392 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
393 N_("stop parsing after the "
394 "first non-option argument")),
395 OPT_BOOL(0, "stuck-long", &stuck_long,
396 N_("output in stuck long form")),
397 OPT_END(),
398 };
399 static const char * const flag_chars = "*=?!";
400 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
402 const char **usage = NULL;
403 struct option *opts = NULL;
404 int onb = 0, osz = 0, unb = 0, usz = 0;
405 strbuf_addstr(&parsed, "set --");
407 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
408 PARSE_OPT_KEEP_DASHDASH);
409 if (argc < 1 || strcmp(argv[0], "--"))
410 usage_with_options(parseopt_usage, parseopt_opts);
411 /* get the usage up to the first line with a -- on it */
413 for (;;) {
414 if (strbuf_getline(&sb, stdin) == EOF)
415 die("premature end of input");
416 ALLOC_GROW(usage, unb + 1, usz);
417 if (!strcmp("--", sb.buf)) {
418 if (unb < 1)
419 die("no usage string given before the `--' separator");
420 usage[unb] = NULL;
421 break;
422 }
423 usage[unb++] = strbuf_detach(&sb, NULL);
424 }
425 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
427 while (strbuf_getline(&sb, stdin) != EOF) {
428 const char *s;
429 const char *help;
430 struct option *o;
431 if (!sb.len)
433 continue;
434 ALLOC_GROW(opts, onb + 1, osz);
436 memset(opts + onb, 0, sizeof(opts[onb]));
437 o = &opts[onb++];
439 help = strchr(sb.buf, ' ');
440 if (!help || *sb.buf == ' ') {
441 o->type = OPTION_GROUP;
442 o->help = xstrdup(skipspaces(sb.buf));
443 continue;
444 }
445 o->type = OPTION_CALLBACK;
447 o->help = xstrdup(skipspaces(help));
448 o->value = &parsed;
449 o->flags = PARSE_OPT_NOARG;
450 o->callback = &parseopt_dump;
451 /* name(s) */
453 s = strpbrk(sb.buf, flag_chars);
454 if (s == NULL)
455 s = help;
456 if (s - sb.buf == 1) /* short option only */
458 o->short_name = *sb.buf;
459 else if (sb.buf[1] != ',') /* long option only */
460 o->long_name = xmemdupz(sb.buf, s - sb.buf);
461 else {
462 o->short_name = *sb.buf;
463 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
464 }
465 /* flags */
467 while (s < help) {
468 switch (*s++) {
469 case '=':
470 o->flags &= ~PARSE_OPT_NOARG;
471 continue;
472 case '?':
473 o->flags &= ~PARSE_OPT_NOARG;
474 o->flags |= PARSE_OPT_OPTARG;
475 continue;
476 case '!':
477 o->flags |= PARSE_OPT_NONEG;
478 continue;
479 case '*':
480 o->flags |= PARSE_OPT_HIDDEN;
481 continue;
482 }
483 s--;
484 break;
485 }
486 if (s < help)
488 o->argh = xmemdupz(s, help - s);
489 }
490 strbuf_release(&sb);
491 /* put an OPT_END() */
493 ALLOC_GROW(opts, onb + 1, osz);
494 memset(opts + onb, 0, sizeof(opts[onb]));
495 argc = parse_options(argc, argv, prefix, opts, usage,
496 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
497 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
498 PARSE_OPT_SHELL_EVAL);
499 strbuf_addstr(&parsed, " --");
501 sq_quote_argv(&parsed, argv, 0);
502 puts(parsed.buf);
503 return 0;
504}
505static int cmd_sq_quote(int argc, const char **argv)
507{
508 struct strbuf buf = STRBUF_INIT;
509 if (argc)
511 sq_quote_argv(&buf, argv, 0);
512 printf("%s\n", buf.buf);
513 strbuf_release(&buf);
514 return 0;
516}
517static void die_no_single_rev(int quiet)
519{
520 if (quiet)
521 exit(1);
522 else
523 die("Needed a single revision");
524}
525static const char builtin_rev_parse_usage[] =
527N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
528 " or: git rev-parse --sq-quote [<arg>...]\n"
529 " or: git rev-parse [<options>] [<arg>...]\n"
530 "\n"
531 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
532int cmd_rev_parse(int argc, const char **argv, const char *prefix)
534{
535 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
536 int did_repo_setup = 0;
537 int has_dashdash = 0;
538 int output_prefix = 0;
539 unsigned char sha1[20];
540 unsigned int flags = 0;
541 const char *name = NULL;
542 struct object_context unused;
543 if (argc > 1 && !strcmp("--parseopt", argv[1]))
545 return cmd_parseopt(argc - 1, argv + 1, prefix);
546 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
548 return cmd_sq_quote(argc - 2, argv + 2);
549 if (argc > 1 && !strcmp("-h", argv[1]))
551 usage(builtin_rev_parse_usage);
552 for (i = 1; i < argc; i++) {
554 if (!strcmp(argv[i], "--")) {
555 has_dashdash = 1;
556 break;
557 }
558 }
559 /* No options; just report on whether we're in a git repo or not. */
561 if (argc == 1) {
562 setup_git_directory();
563 git_config(git_default_config, NULL);
564 return 0;
565 }
566 for (i = 1; i < argc; i++) {
568 const char *arg = argv[i];
569 if (!strcmp(arg, "--local-env-vars")) {
571 int i;
572 for (i = 0; local_repo_env[i]; i++)
573 printf("%s\n", local_repo_env[i]);
574 continue;
575 }
576 if (!strcmp(arg, "--resolve-git-dir")) {
577 const char *gitdir = argv[++i];
578 if (!gitdir)
579 die("--resolve-git-dir requires an argument");
580 gitdir = resolve_gitdir(gitdir);
581 if (!gitdir)
582 die("not a gitdir '%s'", argv[i]);
583 puts(gitdir);
584 continue;
585 }
586 /* The rest of the options require a git repository. */
588 if (!did_repo_setup) {
589 prefix = setup_git_directory();
590 git_config(git_default_config, NULL);
591 did_repo_setup = 1;
592 }
593 if (!strcmp(arg, "--git-path")) {
595 if (!argv[i + 1])
596 die("--git-path requires an argument");
597 puts(git_path("%s", argv[i + 1]));
598 i++;
599 continue;
600 }
601 if (as_is) {
602 if (show_file(arg, output_prefix) && as_is < 2)
603 verify_filename(prefix, arg, 0);
604 continue;
605 }
606 if (!strcmp(arg,"-n")) {
607 if (++i >= argc)
608 die("-n requires an argument");
609 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
610 show(arg);
611 show(argv[i]);
612 }
613 continue;
614 }
615 if (starts_with(arg, "-n")) {
616 if ((filter & DO_FLAGS) && (filter & DO_REVS))
617 show(arg);
618 continue;
619 }
620 if (*arg == '-') {
622 if (!strcmp(arg, "--")) {
623 as_is = 2;
624 /* Pass on the "--" if we show anything but files.. */
625 if (filter & (DO_FLAGS | DO_REVS))
626 show_file(arg, 0);
627 continue;
628 }
629 if (!strcmp(arg, "--default")) {
630 def = argv[++i];
631 if (!def)
632 die("--default requires an argument");
633 continue;
634 }
635 if (!strcmp(arg, "--prefix")) {
636 prefix = argv[++i];
637 if (!prefix)
638 die("--prefix requires an argument");
639 startup_info->prefix = prefix;
640 output_prefix = 1;
641 continue;
642 }
643 if (!strcmp(arg, "--revs-only")) {
644 filter &= ~DO_NOREV;
645 continue;
646 }
647 if (!strcmp(arg, "--no-revs")) {
648 filter &= ~DO_REVS;
649 continue;
650 }
651 if (!strcmp(arg, "--flags")) {
652 filter &= ~DO_NONFLAGS;
653 continue;
654 }
655 if (!strcmp(arg, "--no-flags")) {
656 filter &= ~DO_FLAGS;
657 continue;
658 }
659 if (!strcmp(arg, "--verify")) {
660 filter &= ~(DO_FLAGS|DO_NOREV);
661 verify = 1;
662 continue;
663 }
664 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
665 quiet = 1;
666 flags |= GET_SHA1_QUIETLY;
667 continue;
668 }
669 if (!strcmp(arg, "--short") ||
670 starts_with(arg, "--short=")) {
671 filter &= ~(DO_FLAGS|DO_NOREV);
672 verify = 1;
673 abbrev = DEFAULT_ABBREV;
674 if (!arg[7])
675 continue;
676 abbrev = strtoul(arg + 8, NULL, 10);
677 if (abbrev < MINIMUM_ABBREV)
678 abbrev = MINIMUM_ABBREV;
679 else if (40 <= abbrev)
680 abbrev = 40;
681 continue;
682 }
683 if (!strcmp(arg, "--sq")) {
684 output_sq = 1;
685 continue;
686 }
687 if (!strcmp(arg, "--not")) {
688 show_type ^= REVERSED;
689 continue;
690 }
691 if (!strcmp(arg, "--symbolic")) {
692 symbolic = SHOW_SYMBOLIC_ASIS;
693 continue;
694 }
695 if (!strcmp(arg, "--symbolic-full-name")) {
696 symbolic = SHOW_SYMBOLIC_FULL;
697 continue;
698 }
699 if (starts_with(arg, "--abbrev-ref") &&
700 (!arg[12] || arg[12] == '=')) {
701 abbrev_ref = 1;
702 abbrev_ref_strict = warn_ambiguous_refs;
703 if (arg[12] == '=') {
704 if (!strcmp(arg + 13, "strict"))
705 abbrev_ref_strict = 1;
706 else if (!strcmp(arg + 13, "loose"))
707 abbrev_ref_strict = 0;
708 else
709 die("unknown mode for %s", arg);
710 }
711 continue;
712 }
713 if (!strcmp(arg, "--all")) {
714 for_each_ref(show_reference, NULL);
715 continue;
716 }
717 if (starts_with(arg, "--disambiguate=")) {
718 for_each_abbrev(arg + 15, show_abbrev, NULL);
719 continue;
720 }
721 if (!strcmp(arg, "--bisect")) {
722 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
723 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
724 continue;
725 }
726 if (starts_with(arg, "--branches=")) {
727 for_each_glob_ref_in(show_reference, arg + 11,
728 "refs/heads/", NULL);
729 clear_ref_exclusion(&ref_excludes);
730 continue;
731 }
732 if (!strcmp(arg, "--branches")) {
733 for_each_branch_ref(show_reference, NULL);
734 clear_ref_exclusion(&ref_excludes);
735 continue;
736 }
737 if (starts_with(arg, "--tags=")) {
738 for_each_glob_ref_in(show_reference, arg + 7,
739 "refs/tags/", NULL);
740 clear_ref_exclusion(&ref_excludes);
741 continue;
742 }
743 if (!strcmp(arg, "--tags")) {
744 for_each_tag_ref(show_reference, NULL);
745 clear_ref_exclusion(&ref_excludes);
746 continue;
747 }
748 if (starts_with(arg, "--glob=")) {
749 for_each_glob_ref(show_reference, arg + 7, NULL);
750 clear_ref_exclusion(&ref_excludes);
751 continue;
752 }
753 if (starts_with(arg, "--remotes=")) {
754 for_each_glob_ref_in(show_reference, arg + 10,
755 "refs/remotes/", NULL);
756 clear_ref_exclusion(&ref_excludes);
757 continue;
758 }
759 if (!strcmp(arg, "--remotes")) {
760 for_each_remote_ref(show_reference, NULL);
761 clear_ref_exclusion(&ref_excludes);
762 continue;
763 }
764 if (starts_with(arg, "--exclude=")) {
765 add_ref_exclusion(&ref_excludes, arg + 10);
766 continue;
767 }
768 if (!strcmp(arg, "--show-toplevel")) {
769 const char *work_tree = get_git_work_tree();
770 if (work_tree)
771 puts(work_tree);
772 continue;
773 }
774 if (!strcmp(arg, "--show-prefix")) {
775 if (prefix)
776 puts(prefix);
777 else
778 putchar('\n');
779 continue;
780 }
781 if (!strcmp(arg, "--show-cdup")) {
782 const char *pfx = prefix;
783 if (!is_inside_work_tree()) {
784 const char *work_tree =
785 get_git_work_tree();
786 if (work_tree)
787 printf("%s\n", work_tree);
788 continue;
789 }
790 while (pfx) {
791 pfx = strchr(pfx, '/');
792 if (pfx) {
793 pfx++;
794 printf("../");
795 }
796 }
797 putchar('\n');
798 continue;
799 }
800 if (!strcmp(arg, "--git-dir")) {
801 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
802 char *cwd;
803 int len;
804 if (gitdir) {
805 puts(gitdir);
806 continue;
807 }
808 if (!prefix) {
809 puts(".git");
810 continue;
811 }
812 cwd = xgetcwd();
813 len = strlen(cwd);
814 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
815 free(cwd);
816 continue;
817 }
818 if (!strcmp(arg, "--git-common-dir")) {
819 const char *pfx = prefix ? prefix : "";
820 puts(prefix_filename(pfx, strlen(pfx), get_git_common_dir()));
821 continue;
822 }
823 if (!strcmp(arg, "--is-inside-git-dir")) {
824 printf("%s\n", is_inside_git_dir() ? "true"
825 : "false");
826 continue;
827 }
828 if (!strcmp(arg, "--is-inside-work-tree")) {
829 printf("%s\n", is_inside_work_tree() ? "true"
830 : "false");
831 continue;
832 }
833 if (!strcmp(arg, "--is-bare-repository")) {
834 printf("%s\n", is_bare_repository() ? "true"
835 : "false");
836 continue;
837 }
838 if (!strcmp(arg, "--shared-index-path")) {
839 if (read_cache() < 0)
840 die(_("Could not read the index"));
841 if (the_index.split_index) {
842 const unsigned char *sha1 = the_index.split_index->base_sha1;
843 puts(git_path("sharedindex.%s", sha1_to_hex(sha1)));
844 }
845 continue;
846 }
847 if (starts_with(arg, "--since=")) {
848 show_datestring("--max-age=", arg+8);
849 continue;
850 }
851 if (starts_with(arg, "--after=")) {
852 show_datestring("--max-age=", arg+8);
853 continue;
854 }
855 if (starts_with(arg, "--before=")) {
856 show_datestring("--min-age=", arg+9);
857 continue;
858 }
859 if (starts_with(arg, "--until=")) {
860 show_datestring("--min-age=", arg+8);
861 continue;
862 }
863 if (show_flag(arg) && verify)
864 die_no_single_rev(quiet);
865 continue;
866 }
867 /* Not a flag argument */
869 if (try_difference(arg))
870 continue;
871 if (try_parent_shorthands(arg))
872 continue;
873 name = arg;
874 type = NORMAL;
875 if (*arg == '^') {
876 name++;
877 type = REVERSED;
878 }
879 if (!get_sha1_with_context(name, flags, sha1, &unused)) {
880 if (verify)
881 revs_count++;
882 else
883 show_rev(type, sha1, name);
884 continue;
885 }
886 if (verify)
887 die_no_single_rev(quiet);
888 if (has_dashdash)
889 die("bad revision '%s'", arg);
890 as_is = 1;
891 if (!show_file(arg, output_prefix))
892 continue;
893 verify_filename(prefix, arg, 1);
894 }
895 if (verify) {
896 if (revs_count == 1) {
897 show_rev(type, sha1, name);
898 return 0;
899 } else if (revs_count == 0 && show_default())
900 return 0;
901 die_no_single_rev(quiet);
902 } else
903 show_default();
904 return 0;
905}