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 unsigned char *sha1, 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 unsigned char discard[20];
133 char *full;
134 switch (dwim_ref(name, strlen(name), discard, &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(sha1, abbrev));
162 else
163 show_with_type(type, sha1_to_hex(sha1));
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 unsigned char sha1[20];
184 def = NULL;
186 if (!get_sha1(s, sha1)) {
187 show_rev(NORMAL, sha1, 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->hash, 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->hash, refname);
205 return 0;
206}
207static int show_abbrev(const unsigned char *sha1, void *cb_data)
209{
210 show_rev(NORMAL, sha1, NULL);
211 return 0;
212}
213static void show_datestring(const char *flag, const char *datestr)
215{
216 static char buffer[100];
217 /* date handling requires both flags and revs */
219 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
220 return;
221 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
222 show(buffer);
223}
224static int show_file(const char *arg, int output_prefix)
226{
227 show_default();
228 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
229 if (output_prefix) {
230 const char *prefix = startup_info->prefix;
231 show(prefix_filename(prefix,
232 prefix ? strlen(prefix) : 0,
233 arg));
234 } else
235 show(arg);
236 return 1;
237 }
238 return 0;
239}
240static int try_difference(const char *arg)
242{
243 char *dotdot;
244 unsigned char sha1[20];
245 unsigned char end[20];
246 const char *next;
247 const char *this;
248 int symmetric;
249 static const char head_by_default[] = "HEAD";
250 if (!(dotdot = strstr(arg, "..")))
252 return 0;
253 next = dotdot + 2;
254 this = arg;
255 symmetric = (*next == '.');
256 *dotdot = 0;
258 next += symmetric;
259 if (!*next)
261 next = head_by_default;
262 if (dotdot == arg)
263 this = head_by_default;
264 if (this == head_by_default && next == head_by_default &&
266 !symmetric) {
267 /*
268 * Just ".."? That is not a range but the
269 * pathspec for the parent directory.
270 */
271 *dotdot = '.';
272 return 0;
273 }
274 if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
276 show_rev(NORMAL, end, next);
277 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
278 if (symmetric) {
279 struct commit_list *exclude;
280 struct commit *a, *b;
281 a = lookup_commit_reference(sha1);
282 b = lookup_commit_reference(end);
283 exclude = get_merge_bases(a, b);
284 while (exclude) {
285 struct commit *commit = pop_commit(&exclude);
286 show_rev(REVERSED, commit->object.oid.hash, NULL);
287 }
288 }
289 *dotdot = '.';
290 return 1;
291 }
292 *dotdot = '.';
293 return 0;
294}
295static int try_parent_shorthands(const char *arg)
297{
298 char *dotdot;
299 unsigned char sha1[20];
300 struct commit *commit;
301 struct commit_list *parents;
302 int parent_number;
303 int include_rev = 0;
304 int include_parents = 0;
305 int exclude_parent = 0;
306 if ((dotdot = strstr(arg, "^!"))) {
308 include_rev = 1;
309 if (dotdot[2])
310 return 0;
311 } else if ((dotdot = strstr(arg, "^@"))) {
312 include_parents = 1;
313 if (dotdot[2])
314 return 0;
315 } else if ((dotdot = strstr(arg, "^-"))) {
316 include_rev = 1;
317 exclude_parent = 1;
318 if (dotdot[2]) {
320 char *end;
321 exclude_parent = strtoul(dotdot + 2, &end, 10);
322 if (*end != '\0' || !exclude_parent)
323 return 0;
324 }
325 } else
326 return 0;
327 *dotdot = 0;
329 if (get_sha1_committish(arg, sha1)) {
330 *dotdot = '^';
331 return 0;
332 }
333 commit = lookup_commit_reference(sha1);
335 if (exclude_parent &&
336 exclude_parent > commit_list_count(commit->parents)) {
337 *dotdot = '^';
338 return 0;
339 }
340 if (include_rev)
342 show_rev(NORMAL, sha1, arg);
343 for (parents = commit->parents, parent_number = 1;
344 parents;
345 parents = parents->next, parent_number++) {
346 char *name = NULL;
347 if (exclude_parent && parent_number != exclude_parent)
349 continue;
350 if (symbolic)
352 name = xstrfmt("%s^%d", arg, parent_number);
353 show_rev(include_parents ? NORMAL : REVERSED,
354 parents->item->object.oid.hash, name);
355 free(name);
356 }
357 *dotdot = '^';
359 return 1;
360}
361static int parseopt_dump(const struct option *o, const char *arg, int unset)
363{
364 struct strbuf *parsed = o->value;
365 if (unset)
366 strbuf_addf(parsed, " --no-%s", o->long_name);
367 else if (o->short_name && (o->long_name == NULL || !stuck_long))
368 strbuf_addf(parsed, " -%c", o->short_name);
369 else
370 strbuf_addf(parsed, " --%s", o->long_name);
371 if (arg) {
372 if (!stuck_long)
373 strbuf_addch(parsed, ' ');
374 else if (o->long_name)
375 strbuf_addch(parsed, '=');
376 sq_quote_buf(parsed, arg);
377 }
378 return 0;
379}
380static const char *skipspaces(const char *s)
382{
383 while (isspace(*s))
384 s++;
385 return s;
386}
387static int cmd_parseopt(int argc, const char **argv, const char *prefix)
389{
390 static int keep_dashdash = 0, stop_at_non_option = 0;
391 static char const * const parseopt_usage[] = {
392 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
393 NULL
394 };
395 static struct option parseopt_opts[] = {
396 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
397 N_("keep the `--` passed as an arg")),
398 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
399 N_("stop parsing after the "
400 "first non-option argument")),
401 OPT_BOOL(0, "stuck-long", &stuck_long,
402 N_("output in stuck long form")),
403 OPT_END(),
404 };
405 static const char * const flag_chars = "*=?!";
406 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
408 const char **usage = NULL;
409 struct option *opts = NULL;
410 int onb = 0, osz = 0, unb = 0, usz = 0;
411 strbuf_addstr(&parsed, "set --");
413 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
414 PARSE_OPT_KEEP_DASHDASH);
415 if (argc < 1 || strcmp(argv[0], "--"))
416 usage_with_options(parseopt_usage, parseopt_opts);
417 /* get the usage up to the first line with a -- on it */
419 for (;;) {
420 if (strbuf_getline(&sb, stdin) == EOF)
421 die("premature end of input");
422 ALLOC_GROW(usage, unb + 1, usz);
423 if (!strcmp("--", sb.buf)) {
424 if (unb < 1)
425 die("no usage string given before the `--' separator");
426 usage[unb] = NULL;
427 break;
428 }
429 usage[unb++] = strbuf_detach(&sb, NULL);
430 }
431 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
433 while (strbuf_getline(&sb, stdin) != EOF) {
434 const char *s;
435 const char *help;
436 struct option *o;
437 if (!sb.len)
439 continue;
440 ALLOC_GROW(opts, onb + 1, osz);
442 memset(opts + onb, 0, sizeof(opts[onb]));
443 o = &opts[onb++];
445 help = strchr(sb.buf, ' ');
446 if (!help || *sb.buf == ' ') {
447 o->type = OPTION_GROUP;
448 o->help = xstrdup(skipspaces(sb.buf));
449 continue;
450 }
451 o->type = OPTION_CALLBACK;
453 o->help = xstrdup(skipspaces(help));
454 o->value = &parsed;
455 o->flags = PARSE_OPT_NOARG;
456 o->callback = &parseopt_dump;
457 /* name(s) */
459 s = strpbrk(sb.buf, flag_chars);
460 if (s == NULL)
461 s = help;
462 if (s - sb.buf == 1) /* short option only */
464 o->short_name = *sb.buf;
465 else if (sb.buf[1] != ',') /* long option only */
466 o->long_name = xmemdupz(sb.buf, s - sb.buf);
467 else {
468 o->short_name = *sb.buf;
469 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
470 }
471 /* flags */
473 while (s < help) {
474 switch (*s++) {
475 case '=':
476 o->flags &= ~PARSE_OPT_NOARG;
477 continue;
478 case '?':
479 o->flags &= ~PARSE_OPT_NOARG;
480 o->flags |= PARSE_OPT_OPTARG;
481 continue;
482 case '!':
483 o->flags |= PARSE_OPT_NONEG;
484 continue;
485 case '*':
486 o->flags |= PARSE_OPT_HIDDEN;
487 continue;
488 }
489 s--;
490 break;
491 }
492 if (s < help)
494 o->argh = xmemdupz(s, help - s);
495 }
496 strbuf_release(&sb);
497 /* put an OPT_END() */
499 ALLOC_GROW(opts, onb + 1, osz);
500 memset(opts + onb, 0, sizeof(opts[onb]));
501 argc = parse_options(argc, argv, prefix, opts, usage,
502 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
503 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
504 PARSE_OPT_SHELL_EVAL);
505 strbuf_addstr(&parsed, " --");
507 sq_quote_argv(&parsed, argv, 0);
508 puts(parsed.buf);
509 return 0;
510}
511static int cmd_sq_quote(int argc, const char **argv)
513{
514 struct strbuf buf = STRBUF_INIT;
515 if (argc)
517 sq_quote_argv(&buf, argv, 0);
518 printf("%s\n", buf.buf);
519 strbuf_release(&buf);
520 return 0;
522}
523static void die_no_single_rev(int quiet)
525{
526 if (quiet)
527 exit(1);
528 else
529 die("Needed a single revision");
530}
531static const char builtin_rev_parse_usage[] =
533N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
534 " or: git rev-parse --sq-quote [<arg>...]\n"
535 " or: git rev-parse [<options>] [<arg>...]\n"
536 "\n"
537 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
538/*
540 * Parse "opt" or "opt=<value>", setting value respectively to either
541 * NULL or the string after "=".
542 */
543static int opt_with_value(const char *arg, const char *opt, const char **value)
544{
545 if (skip_prefix(arg, opt, &arg)) {
546 if (!*arg) {
547 *value = NULL;
548 return 1;
549 }
550 if (*arg++ == '=') {
551 *value = arg;
552 return 1;
553 }
554 }
555 return 0;
556}
557static void handle_ref_opt(const char *pattern, const char *prefix)
559{
560 if (pattern)
561 for_each_glob_ref_in(show_reference, pattern, prefix, NULL);
562 else
563 for_each_ref_in(prefix, show_reference, NULL);
564 clear_ref_exclusion(&ref_excludes);
565}
566int cmd_rev_parse(int argc, const char **argv, const char *prefix)
568{
569 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
570 int did_repo_setup = 0;
571 int has_dashdash = 0;
572 int output_prefix = 0;
573 unsigned char sha1[20];
574 unsigned int flags = 0;
575 const char *name = NULL;
576 struct object_context unused;
577 struct strbuf buf = STRBUF_INIT;
578 if (argc > 1 && !strcmp("--parseopt", argv[1]))
580 return cmd_parseopt(argc - 1, argv + 1, prefix);
581 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
583 return cmd_sq_quote(argc - 2, argv + 2);
584 if (argc > 1 && !strcmp("-h", argv[1]))
586 usage(builtin_rev_parse_usage);
587 for (i = 1; i < argc; i++) {
589 if (!strcmp(argv[i], "--")) {
590 has_dashdash = 1;
591 break;
592 }
593 }
594 /* No options; just report on whether we're in a git repo or not. */
596 if (argc == 1) {
597 setup_git_directory();
598 git_config(git_default_config, NULL);
599 return 0;
600 }
601 for (i = 1; i < argc; i++) {
603 const char *arg = argv[i];
604 if (!strcmp(arg, "--local-env-vars")) {
606 int i;
607 for (i = 0; local_repo_env[i]; i++)
608 printf("%s\n", local_repo_env[i]);
609 continue;
610 }
611 if (!strcmp(arg, "--resolve-git-dir")) {
612 const char *gitdir = argv[++i];
613 if (!gitdir)
614 die("--resolve-git-dir requires an argument");
615 gitdir = resolve_gitdir(gitdir);
616 if (!gitdir)
617 die("not a gitdir '%s'", argv[i]);
618 puts(gitdir);
619 continue;
620 }
621 /* The rest of the options require a git repository. */
623 if (!did_repo_setup) {
624 prefix = setup_git_directory();
625 git_config(git_default_config, NULL);
626 did_repo_setup = 1;
627 }
628 if (!strcmp(arg, "--git-path")) {
630 if (!argv[i + 1])
631 die("--git-path requires an argument");
632 strbuf_reset(&buf);
633 puts(relative_path(git_path("%s", argv[i + 1]),
634 prefix, &buf));
635 i++;
636 continue;
637 }
638 if (as_is) {
639 if (show_file(arg, output_prefix) && as_is < 2)
640 verify_filename(prefix, arg, 0);
641 continue;
642 }
643 if (!strcmp(arg,"-n")) {
644 if (++i >= argc)
645 die("-n requires an argument");
646 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
647 show(arg);
648 show(argv[i]);
649 }
650 continue;
651 }
652 if (starts_with(arg, "-n")) {
653 if ((filter & DO_FLAGS) && (filter & DO_REVS))
654 show(arg);
655 continue;
656 }
657 if (*arg == '-') {
659 if (!strcmp(arg, "--")) {
660 as_is = 2;
661 /* Pass on the "--" if we show anything but files.. */
662 if (filter & (DO_FLAGS | DO_REVS))
663 show_file(arg, 0);
664 continue;
665 }
666 if (!strcmp(arg, "--default")) {
667 def = argv[++i];
668 if (!def)
669 die("--default requires an argument");
670 continue;
671 }
672 if (!strcmp(arg, "--prefix")) {
673 prefix = argv[++i];
674 if (!prefix)
675 die("--prefix requires an argument");
676 startup_info->prefix = prefix;
677 output_prefix = 1;
678 continue;
679 }
680 if (!strcmp(arg, "--revs-only")) {
681 filter &= ~DO_NOREV;
682 continue;
683 }
684 if (!strcmp(arg, "--no-revs")) {
685 filter &= ~DO_REVS;
686 continue;
687 }
688 if (!strcmp(arg, "--flags")) {
689 filter &= ~DO_NONFLAGS;
690 continue;
691 }
692 if (!strcmp(arg, "--no-flags")) {
693 filter &= ~DO_FLAGS;
694 continue;
695 }
696 if (!strcmp(arg, "--verify")) {
697 filter &= ~(DO_FLAGS|DO_NOREV);
698 verify = 1;
699 continue;
700 }
701 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
702 quiet = 1;
703 flags |= GET_SHA1_QUIETLY;
704 continue;
705 }
706 if (opt_with_value(arg, "--short", &arg)) {
707 filter &= ~(DO_FLAGS|DO_NOREV);
708 verify = 1;
709 abbrev = DEFAULT_ABBREV;
710 if (!arg)
711 continue;
712 abbrev = strtoul(arg, NULL, 10);
713 if (abbrev < MINIMUM_ABBREV)
714 abbrev = MINIMUM_ABBREV;
715 else if (40 <= abbrev)
716 abbrev = 40;
717 continue;
718 }
719 if (!strcmp(arg, "--sq")) {
720 output_sq = 1;
721 continue;
722 }
723 if (!strcmp(arg, "--not")) {
724 show_type ^= REVERSED;
725 continue;
726 }
727 if (!strcmp(arg, "--symbolic")) {
728 symbolic = SHOW_SYMBOLIC_ASIS;
729 continue;
730 }
731 if (!strcmp(arg, "--symbolic-full-name")) {
732 symbolic = SHOW_SYMBOLIC_FULL;
733 continue;
734 }
735 if (opt_with_value(arg, "--abbrev-ref", &arg)) {
736 abbrev_ref = 1;
737 abbrev_ref_strict = warn_ambiguous_refs;
738 if (arg) {
739 if (!strcmp(arg, "strict"))
740 abbrev_ref_strict = 1;
741 else if (!strcmp(arg, "loose"))
742 abbrev_ref_strict = 0;
743 else
744 die("unknown mode for --abbrev-ref: %s",
745 arg);
746 }
747 continue;
748 }
749 if (!strcmp(arg, "--all")) {
750 for_each_ref(show_reference, NULL);
751 continue;
752 }
753 if (skip_prefix(arg, "--disambiguate=", &arg)) {
754 for_each_abbrev(arg, show_abbrev, NULL);
755 continue;
756 }
757 if (!strcmp(arg, "--bisect")) {
758 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
759 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
760 continue;
761 }
762 if (opt_with_value(arg, "--branches", &arg)) {
763 handle_ref_opt(arg, "refs/heads/");
764 continue;
765 }
766 if (opt_with_value(arg, "--tags", &arg)) {
767 handle_ref_opt(arg, "refs/tags/");
768 continue;
769 }
770 if (skip_prefix(arg, "--glob=", &arg)) {
771 handle_ref_opt(arg, NULL);
772 continue;
773 }
774 if (opt_with_value(arg, "--remotes", &arg)) {
775 handle_ref_opt(arg, "refs/remotes/");
776 continue;
777 }
778 if (skip_prefix(arg, "--exclude=", &arg)) {
779 add_ref_exclusion(&ref_excludes, arg);
780 continue;
781 }
782 if (!strcmp(arg, "--show-toplevel")) {
783 const char *work_tree = get_git_work_tree();
784 if (work_tree)
785 puts(work_tree);
786 continue;
787 }
788 if (!strcmp(arg, "--show-superproject-working-tree")) {
789 const char *superproject = get_superproject_working_tree();
790 if (superproject)
791 puts(superproject);
792 continue;
793 }
794 if (!strcmp(arg, "--show-prefix")) {
795 if (prefix)
796 puts(prefix);
797 else
798 putchar('\n');
799 continue;
800 }
801 if (!strcmp(arg, "--show-cdup")) {
802 const char *pfx = prefix;
803 if (!is_inside_work_tree()) {
804 const char *work_tree =
805 get_git_work_tree();
806 if (work_tree)
807 printf("%s\n", work_tree);
808 continue;
809 }
810 while (pfx) {
811 pfx = strchr(pfx, '/');
812 if (pfx) {
813 pfx++;
814 printf("../");
815 }
816 }
817 putchar('\n');
818 continue;
819 }
820 if (!strcmp(arg, "--git-dir") ||
821 !strcmp(arg, "--absolute-git-dir")) {
822 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
823 char *cwd;
824 int len;
825 if (arg[2] == 'g') { /* --git-dir */
826 if (gitdir) {
827 puts(gitdir);
828 continue;
829 }
830 if (!prefix) {
831 puts(".git");
832 continue;
833 }
834 } else { /* --absolute-git-dir */
835 if (!gitdir && !prefix)
836 gitdir = ".git";
837 if (gitdir) {
838 puts(real_path(gitdir));
839 continue;
840 }
841 }
842 cwd = xgetcwd();
843 len = strlen(cwd);
844 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
845 free(cwd);
846 continue;
847 }
848 if (!strcmp(arg, "--git-common-dir")) {
849 strbuf_reset(&buf);
850 puts(relative_path(get_git_common_dir(),
851 prefix, &buf));
852 continue;
853 }
854 if (!strcmp(arg, "--is-inside-git-dir")) {
855 printf("%s\n", is_inside_git_dir() ? "true"
856 : "false");
857 continue;
858 }
859 if (!strcmp(arg, "--is-inside-work-tree")) {
860 printf("%s\n", is_inside_work_tree() ? "true"
861 : "false");
862 continue;
863 }
864 if (!strcmp(arg, "--is-bare-repository")) {
865 printf("%s\n", is_bare_repository() ? "true"
866 : "false");
867 continue;
868 }
869 if (!strcmp(arg, "--shared-index-path")) {
870 if (read_cache() < 0)
871 die(_("Could not read the index"));
872 if (the_index.split_index) {
873 const unsigned char *sha1 = the_index.split_index->base_sha1;
874 const char *path = git_path("sharedindex.%s", sha1_to_hex(sha1));
875 strbuf_reset(&buf);
876 puts(relative_path(path, prefix, &buf));
877 }
878 continue;
879 }
880 if (skip_prefix(arg, "--since=", &arg)) {
881 show_datestring("--max-age=", arg);
882 continue;
883 }
884 if (skip_prefix(arg, "--after=", &arg)) {
885 show_datestring("--max-age=", arg);
886 continue;
887 }
888 if (skip_prefix(arg, "--before=", &arg)) {
889 show_datestring("--min-age=", arg);
890 continue;
891 }
892 if (skip_prefix(arg, "--until=", &arg)) {
893 show_datestring("--min-age=", arg);
894 continue;
895 }
896 if (show_flag(arg) && verify)
897 die_no_single_rev(quiet);
898 continue;
899 }
900 /* Not a flag argument */
902 if (try_difference(arg))
903 continue;
904 if (try_parent_shorthands(arg))
905 continue;
906 name = arg;
907 type = NORMAL;
908 if (*arg == '^') {
909 name++;
910 type = REVERSED;
911 }
912 if (!get_sha1_with_context(name, flags, sha1, &unused)) {
913 if (verify)
914 revs_count++;
915 else
916 show_rev(type, sha1, name);
917 continue;
918 }
919 if (verify)
920 die_no_single_rev(quiet);
921 if (has_dashdash)
922 die("bad revision '%s'", arg);
923 as_is = 1;
924 if (!show_file(arg, output_prefix))
925 continue;
926 verify_filename(prefix, arg, 1);
927 }
928 strbuf_release(&buf);
929 if (verify) {
930 if (revs_count == 1) {
931 show_rev(type, sha1, name);
932 return 0;
933 } else if (revs_count == 0 && show_default())
934 return 0;
935 die_no_single_rev(quiet);
936 } else
937 show_default();
938 return 0;
939}