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 parents_only;
302 if ((dotdot = strstr(arg, "^!")))
304 parents_only = 0;
305 else if ((dotdot = strstr(arg, "^@")))
306 parents_only = 1;
307 if (!dotdot || dotdot[2])
309 return 0;
310 *dotdot = 0;
312 if (get_sha1_committish(arg, sha1)) {
313 *dotdot = '^';
314 return 0;
315 }
316 if (!parents_only)
318 show_rev(NORMAL, sha1, arg);
319 commit = lookup_commit_reference(sha1);
320 for (parents = commit->parents; parents; parents = parents->next)
321 show_rev(parents_only ? NORMAL : REVERSED,
322 parents->item->object.oid.hash, arg);
323 *dotdot = '^';
325 return 1;
326}
327static int parseopt_dump(const struct option *o, const char *arg, int unset)
329{
330 struct strbuf *parsed = o->value;
331 if (unset)
332 strbuf_addf(parsed, " --no-%s", o->long_name);
333 else if (o->short_name && (o->long_name == NULL || !stuck_long))
334 strbuf_addf(parsed, " -%c", o->short_name);
335 else
336 strbuf_addf(parsed, " --%s", o->long_name);
337 if (arg) {
338 if (!stuck_long)
339 strbuf_addch(parsed, ' ');
340 else if (o->long_name)
341 strbuf_addch(parsed, '=');
342 sq_quote_buf(parsed, arg);
343 }
344 return 0;
345}
346static const char *skipspaces(const char *s)
348{
349 while (isspace(*s))
350 s++;
351 return s;
352}
353static int cmd_parseopt(int argc, const char **argv, const char *prefix)
355{
356 static int keep_dashdash = 0, stop_at_non_option = 0;
357 static char const * const parseopt_usage[] = {
358 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
359 NULL
360 };
361 static struct option parseopt_opts[] = {
362 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
363 N_("keep the `--` passed as an arg")),
364 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
365 N_("stop parsing after the "
366 "first non-option argument")),
367 OPT_BOOL(0, "stuck-long", &stuck_long,
368 N_("output in stuck long form")),
369 OPT_END(),
370 };
371 static const char * const flag_chars = "*=?!";
372 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
374 const char **usage = NULL;
375 struct option *opts = NULL;
376 int onb = 0, osz = 0, unb = 0, usz = 0;
377 strbuf_addstr(&parsed, "set --");
379 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
380 PARSE_OPT_KEEP_DASHDASH);
381 if (argc < 1 || strcmp(argv[0], "--"))
382 usage_with_options(parseopt_usage, parseopt_opts);
383 /* get the usage up to the first line with a -- on it */
385 for (;;) {
386 if (strbuf_getline(&sb, stdin) == EOF)
387 die("premature end of input");
388 ALLOC_GROW(usage, unb + 1, usz);
389 if (!strcmp("--", sb.buf)) {
390 if (unb < 1)
391 die("no usage string given before the `--' separator");
392 usage[unb] = NULL;
393 break;
394 }
395 usage[unb++] = strbuf_detach(&sb, NULL);
396 }
397 /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
399 while (strbuf_getline(&sb, stdin) != EOF) {
400 const char *s;
401 const char *help;
402 struct option *o;
403 if (!sb.len)
405 continue;
406 ALLOC_GROW(opts, onb + 1, osz);
408 memset(opts + onb, 0, sizeof(opts[onb]));
409 o = &opts[onb++];
411 help = strchr(sb.buf, ' ');
412 if (!help || *sb.buf == ' ') {
413 o->type = OPTION_GROUP;
414 o->help = xstrdup(skipspaces(sb.buf));
415 continue;
416 }
417 o->type = OPTION_CALLBACK;
419 o->help = xstrdup(skipspaces(help));
420 o->value = &parsed;
421 o->flags = PARSE_OPT_NOARG;
422 o->callback = &parseopt_dump;
423 /* name(s) */
425 s = strpbrk(sb.buf, flag_chars);
426 if (s == NULL)
427 s = help;
428 if (s - sb.buf == 1) /* short option only */
430 o->short_name = *sb.buf;
431 else if (sb.buf[1] != ',') /* long option only */
432 o->long_name = xmemdupz(sb.buf, s - sb.buf);
433 else {
434 o->short_name = *sb.buf;
435 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
436 }
437 /* flags */
439 while (s < help) {
440 switch (*s++) {
441 case '=':
442 o->flags &= ~PARSE_OPT_NOARG;
443 continue;
444 case '?':
445 o->flags &= ~PARSE_OPT_NOARG;
446 o->flags |= PARSE_OPT_OPTARG;
447 continue;
448 case '!':
449 o->flags |= PARSE_OPT_NONEG;
450 continue;
451 case '*':
452 o->flags |= PARSE_OPT_HIDDEN;
453 continue;
454 }
455 s--;
456 break;
457 }
458 if (s < help)
460 o->argh = xmemdupz(s, help - s);
461 }
462 strbuf_release(&sb);
463 /* put an OPT_END() */
465 ALLOC_GROW(opts, onb + 1, osz);
466 memset(opts + onb, 0, sizeof(opts[onb]));
467 argc = parse_options(argc, argv, prefix, opts, usage,
468 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
469 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
470 PARSE_OPT_SHELL_EVAL);
471 strbuf_addstr(&parsed, " --");
473 sq_quote_argv(&parsed, argv, 0);
474 puts(parsed.buf);
475 return 0;
476}
477static int cmd_sq_quote(int argc, const char **argv)
479{
480 struct strbuf buf = STRBUF_INIT;
481 if (argc)
483 sq_quote_argv(&buf, argv, 0);
484 printf("%s\n", buf.buf);
485 strbuf_release(&buf);
486 return 0;
488}
489static void die_no_single_rev(int quiet)
491{
492 if (quiet)
493 exit(1);
494 else
495 die("Needed a single revision");
496}
497static const char builtin_rev_parse_usage[] =
499N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
500 " or: git rev-parse --sq-quote [<arg>...]\n"
501 " or: git rev-parse [<options>] [<arg>...]\n"
502 "\n"
503 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
504int cmd_rev_parse(int argc, const char **argv, const char *prefix)
506{
507 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
508 int did_repo_setup = 0;
509 int has_dashdash = 0;
510 int output_prefix = 0;
511 unsigned char sha1[20];
512 unsigned int flags = 0;
513 const char *name = NULL;
514 struct object_context unused;
515 if (argc > 1 && !strcmp("--parseopt", argv[1]))
517 return cmd_parseopt(argc - 1, argv + 1, prefix);
518 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
520 return cmd_sq_quote(argc - 2, argv + 2);
521 if (argc > 1 && !strcmp("-h", argv[1]))
523 usage(builtin_rev_parse_usage);
524 for (i = 1; i < argc; i++) {
526 if (!strcmp(argv[i], "--")) {
527 has_dashdash = 1;
528 break;
529 }
530 }
531 /* No options; just report on whether we're in a git repo or not. */
533 if (argc == 1) {
534 setup_git_directory();
535 git_config(git_default_config, NULL);
536 return 0;
537 }
538 for (i = 1; i < argc; i++) {
540 const char *arg = argv[i];
541 if (!strcmp(arg, "--local-env-vars")) {
543 int i;
544 for (i = 0; local_repo_env[i]; i++)
545 printf("%s\n", local_repo_env[i]);
546 continue;
547 }
548 if (!strcmp(arg, "--resolve-git-dir")) {
549 const char *gitdir = argv[++i];
550 if (!gitdir)
551 die("--resolve-git-dir requires an argument");
552 gitdir = resolve_gitdir(gitdir);
553 if (!gitdir)
554 die("not a gitdir '%s'", argv[i]);
555 puts(gitdir);
556 continue;
557 }
558 /* The rest of the options require a git repository. */
560 if (!did_repo_setup) {
561 prefix = setup_git_directory();
562 git_config(git_default_config, NULL);
563 did_repo_setup = 1;
564 }
565 if (!strcmp(arg, "--git-path")) {
567 if (!argv[i + 1])
568 die("--git-path requires an argument");
569 puts(git_path("%s", argv[i + 1]));
570 i++;
571 continue;
572 }
573 if (as_is) {
574 if (show_file(arg, output_prefix) && as_is < 2)
575 verify_filename(prefix, arg, 0);
576 continue;
577 }
578 if (!strcmp(arg,"-n")) {
579 if (++i >= argc)
580 die("-n requires an argument");
581 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
582 show(arg);
583 show(argv[i]);
584 }
585 continue;
586 }
587 if (starts_with(arg, "-n")) {
588 if ((filter & DO_FLAGS) && (filter & DO_REVS))
589 show(arg);
590 continue;
591 }
592 if (*arg == '-') {
594 if (!strcmp(arg, "--")) {
595 as_is = 2;
596 /* Pass on the "--" if we show anything but files.. */
597 if (filter & (DO_FLAGS | DO_REVS))
598 show_file(arg, 0);
599 continue;
600 }
601 if (!strcmp(arg, "--default")) {
602 def = argv[++i];
603 if (!def)
604 die("--default requires an argument");
605 continue;
606 }
607 if (!strcmp(arg, "--prefix")) {
608 prefix = argv[++i];
609 if (!prefix)
610 die("--prefix requires an argument");
611 startup_info->prefix = prefix;
612 output_prefix = 1;
613 continue;
614 }
615 if (!strcmp(arg, "--revs-only")) {
616 filter &= ~DO_NOREV;
617 continue;
618 }
619 if (!strcmp(arg, "--no-revs")) {
620 filter &= ~DO_REVS;
621 continue;
622 }
623 if (!strcmp(arg, "--flags")) {
624 filter &= ~DO_NONFLAGS;
625 continue;
626 }
627 if (!strcmp(arg, "--no-flags")) {
628 filter &= ~DO_FLAGS;
629 continue;
630 }
631 if (!strcmp(arg, "--verify")) {
632 filter &= ~(DO_FLAGS|DO_NOREV);
633 verify = 1;
634 continue;
635 }
636 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
637 quiet = 1;
638 flags |= GET_SHA1_QUIETLY;
639 continue;
640 }
641 if (!strcmp(arg, "--short") ||
642 starts_with(arg, "--short=")) {
643 filter &= ~(DO_FLAGS|DO_NOREV);
644 verify = 1;
645 abbrev = DEFAULT_ABBREV;
646 if (arg[7] == '=')
647 abbrev = strtoul(arg + 8, NULL, 10);
648 if (abbrev < MINIMUM_ABBREV)
649 abbrev = MINIMUM_ABBREV;
650 else if (40 <= abbrev)
651 abbrev = 40;
652 continue;
653 }
654 if (!strcmp(arg, "--sq")) {
655 output_sq = 1;
656 continue;
657 }
658 if (!strcmp(arg, "--not")) {
659 show_type ^= REVERSED;
660 continue;
661 }
662 if (!strcmp(arg, "--symbolic")) {
663 symbolic = SHOW_SYMBOLIC_ASIS;
664 continue;
665 }
666 if (!strcmp(arg, "--symbolic-full-name")) {
667 symbolic = SHOW_SYMBOLIC_FULL;
668 continue;
669 }
670 if (starts_with(arg, "--abbrev-ref") &&
671 (!arg[12] || arg[12] == '=')) {
672 abbrev_ref = 1;
673 abbrev_ref_strict = warn_ambiguous_refs;
674 if (arg[12] == '=') {
675 if (!strcmp(arg + 13, "strict"))
676 abbrev_ref_strict = 1;
677 else if (!strcmp(arg + 13, "loose"))
678 abbrev_ref_strict = 0;
679 else
680 die("unknown mode for %s", arg);
681 }
682 continue;
683 }
684 if (!strcmp(arg, "--all")) {
685 for_each_ref(show_reference, NULL);
686 continue;
687 }
688 if (starts_with(arg, "--disambiguate=")) {
689 for_each_abbrev(arg + 15, show_abbrev, NULL);
690 continue;
691 }
692 if (!strcmp(arg, "--bisect")) {
693 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
694 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
695 continue;
696 }
697 if (starts_with(arg, "--branches=")) {
698 for_each_glob_ref_in(show_reference, arg + 11,
699 "refs/heads/", NULL);
700 clear_ref_exclusion(&ref_excludes);
701 continue;
702 }
703 if (!strcmp(arg, "--branches")) {
704 for_each_branch_ref(show_reference, NULL);
705 clear_ref_exclusion(&ref_excludes);
706 continue;
707 }
708 if (starts_with(arg, "--tags=")) {
709 for_each_glob_ref_in(show_reference, arg + 7,
710 "refs/tags/", NULL);
711 clear_ref_exclusion(&ref_excludes);
712 continue;
713 }
714 if (!strcmp(arg, "--tags")) {
715 for_each_tag_ref(show_reference, NULL);
716 clear_ref_exclusion(&ref_excludes);
717 continue;
718 }
719 if (starts_with(arg, "--glob=")) {
720 for_each_glob_ref(show_reference, arg + 7, NULL);
721 clear_ref_exclusion(&ref_excludes);
722 continue;
723 }
724 if (starts_with(arg, "--remotes=")) {
725 for_each_glob_ref_in(show_reference, arg + 10,
726 "refs/remotes/", NULL);
727 clear_ref_exclusion(&ref_excludes);
728 continue;
729 }
730 if (!strcmp(arg, "--remotes")) {
731 for_each_remote_ref(show_reference, NULL);
732 clear_ref_exclusion(&ref_excludes);
733 continue;
734 }
735 if (starts_with(arg, "--exclude=")) {
736 add_ref_exclusion(&ref_excludes, arg + 10);
737 continue;
738 }
739 if (!strcmp(arg, "--show-toplevel")) {
740 const char *work_tree = get_git_work_tree();
741 if (work_tree)
742 puts(work_tree);
743 continue;
744 }
745 if (!strcmp(arg, "--show-prefix")) {
746 if (prefix)
747 puts(prefix);
748 else
749 putchar('\n');
750 continue;
751 }
752 if (!strcmp(arg, "--show-cdup")) {
753 const char *pfx = prefix;
754 if (!is_inside_work_tree()) {
755 const char *work_tree =
756 get_git_work_tree();
757 if (work_tree)
758 printf("%s\n", work_tree);
759 continue;
760 }
761 while (pfx) {
762 pfx = strchr(pfx, '/');
763 if (pfx) {
764 pfx++;
765 printf("../");
766 }
767 }
768 putchar('\n');
769 continue;
770 }
771 if (!strcmp(arg, "--git-dir")) {
772 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
773 char *cwd;
774 int len;
775 if (gitdir) {
776 puts(gitdir);
777 continue;
778 }
779 if (!prefix) {
780 puts(".git");
781 continue;
782 }
783 cwd = xgetcwd();
784 len = strlen(cwd);
785 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
786 free(cwd);
787 continue;
788 }
789 if (!strcmp(arg, "--git-common-dir")) {
790 const char *pfx = prefix ? prefix : "";
791 puts(prefix_filename(pfx, strlen(pfx), get_git_common_dir()));
792 continue;
793 }
794 if (!strcmp(arg, "--is-inside-git-dir")) {
795 printf("%s\n", is_inside_git_dir() ? "true"
796 : "false");
797 continue;
798 }
799 if (!strcmp(arg, "--is-inside-work-tree")) {
800 printf("%s\n", is_inside_work_tree() ? "true"
801 : "false");
802 continue;
803 }
804 if (!strcmp(arg, "--is-bare-repository")) {
805 printf("%s\n", is_bare_repository() ? "true"
806 : "false");
807 continue;
808 }
809 if (!strcmp(arg, "--shared-index-path")) {
810 if (read_cache() < 0)
811 die(_("Could not read the index"));
812 if (the_index.split_index) {
813 const unsigned char *sha1 = the_index.split_index->base_sha1;
814 puts(git_path("sharedindex.%s", sha1_to_hex(sha1)));
815 }
816 continue;
817 }
818 if (starts_with(arg, "--since=")) {
819 show_datestring("--max-age=", arg+8);
820 continue;
821 }
822 if (starts_with(arg, "--after=")) {
823 show_datestring("--max-age=", arg+8);
824 continue;
825 }
826 if (starts_with(arg, "--before=")) {
827 show_datestring("--min-age=", arg+9);
828 continue;
829 }
830 if (starts_with(arg, "--until=")) {
831 show_datestring("--min-age=", arg+8);
832 continue;
833 }
834 if (show_flag(arg) && verify)
835 die_no_single_rev(quiet);
836 continue;
837 }
838 /* Not a flag argument */
840 if (try_difference(arg))
841 continue;
842 if (try_parent_shorthands(arg))
843 continue;
844 name = arg;
845 type = NORMAL;
846 if (*arg == '^') {
847 name++;
848 type = REVERSED;
849 }
850 if (!get_sha1_with_context(name, flags, sha1, &unused)) {
851 if (verify)
852 revs_count++;
853 else
854 show_rev(type, sha1, name);
855 continue;
856 }
857 if (verify)
858 die_no_single_rev(quiet);
859 if (has_dashdash)
860 die("bad revision '%s'", arg);
861 as_is = 1;
862 if (!show_file(arg, output_prefix))
863 continue;
864 verify_filename(prefix, arg, 1);
865 }
866 if (verify) {
867 if (revs_count == 1) {
868 show_rev(type, sha1, name);
869 return 0;
870 } else if (revs_count == 0 && show_default())
871 return 0;
872 die_no_single_rev(quiet);
873 } else
874 show_default();
875 return 0;
876}