Merge branch 'jc/ref-excludes'
[git/git.git] / builtin / rev-parse.c
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
15 #define DO_REVS 1
16 #define DO_NOREV 2
17 #define DO_FLAGS 4
18 #define DO_NONFLAGS 8
19 static int filter = ~0;
20
21 static const char *def;
22
23 #define NORMAL 0
24 #define REVERSED 1
25 static int show_type = NORMAL;
26
27 #define SHOW_SYMBOLIC_ASIS 1
28 #define SHOW_SYMBOLIC_FULL 2
29 static int symbolic;
30 static int abbrev;
31 static int abbrev_ref;
32 static int abbrev_ref_strict;
33 static int output_sq;
34
35 static int stuck_long;
36 static struct string_list *ref_excludes;
37
38 /*
39 * Some arguments are relevant "revision" arguments,
40 * others are about output format or other details.
41 * This sorts it all out.
42 */
43 static int is_rev_argument(const char *arg)
44 {
45 static const char *rev_args[] = {
46 "--all",
47 "--bisect",
48 "--dense",
49 "--branches=",
50 "--branches",
51 "--header",
52 "--ignore-missing",
53 "--max-age=",
54 "--max-count=",
55 "--min-age=",
56 "--no-merges",
57 "--min-parents=",
58 "--no-min-parents",
59 "--max-parents=",
60 "--no-max-parents",
61 "--objects",
62 "--objects-edge",
63 "--parents",
64 "--pretty",
65 "--remotes=",
66 "--remotes",
67 "--glob=",
68 "--sparse",
69 "--tags=",
70 "--tags",
71 "--topo-order",
72 "--date-order",
73 "--unpacked",
74 NULL
75 };
76 const char **p = rev_args;
77
78 /* accept -<digit>, like traditional "head" */
79 if ((*arg == '-') && isdigit(arg[1]))
80 return 1;
81
82 for (;;) {
83 const char *str = *p++;
84 int len;
85 if (!str)
86 return 0;
87 len = strlen(str);
88 if (!strcmp(arg, str) ||
89 (str[len-1] == '=' && !strncmp(arg, str, len)))
90 return 1;
91 }
92 }
93
94 /* Output argument as a string, either SQ or normal */
95 static void show(const char *arg)
96 {
97 if (output_sq) {
98 int sq = '\'', ch;
99
100 putchar(sq);
101 while ((ch = *arg++)) {
102 if (ch == sq)
103 fputs("'\\'", stdout);
104 putchar(ch);
105 }
106 putchar(sq);
107 putchar(' ');
108 }
109 else
110 puts(arg);
111 }
112
113 /* Like show(), but with a negation prefix according to type */
114 static void show_with_type(int type, const char *arg)
115 {
116 if (type != show_type)
117 putchar('^');
118 show(arg);
119 }
120
121 /* Output a revision, only if filter allows it */
122 static void show_rev(int type, const unsigned char *sha1, const char *name)
123 {
124 if (!(filter & DO_REVS))
125 return;
126 def = NULL;
127
128 if ((symbolic || abbrev_ref) && name) {
129 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
130 unsigned char discard[20];
131 char *full;
132
133 switch (dwim_ref(name, strlen(name), discard, &full)) {
134 case 0:
135 /*
136 * Not found -- not a ref. We could
137 * emit "name" here, but symbolic-full
138 * users are interested in finding the
139 * refs spelled in full, and they would
140 * need to filter non-refs if we did so.
141 */
142 break;
143 case 1: /* happy */
144 if (abbrev_ref)
145 full = shorten_unambiguous_ref(full,
146 abbrev_ref_strict);
147 show_with_type(type, full);
148 break;
149 default: /* ambiguous */
150 error("refname '%s' is ambiguous", name);
151 break;
152 }
153 } else {
154 show_with_type(type, name);
155 }
156 }
157 else if (abbrev)
158 show_with_type(type, find_unique_abbrev(sha1, abbrev));
159 else
160 show_with_type(type, sha1_to_hex(sha1));
161 }
162
163 /* Output a flag, only if filter allows it. */
164 static int show_flag(const char *arg)
165 {
166 if (!(filter & DO_FLAGS))
167 return 0;
168 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
169 show(arg);
170 return 1;
171 }
172 return 0;
173 }
174
175 static int show_default(void)
176 {
177 const char *s = def;
178
179 if (s) {
180 unsigned char sha1[20];
181
182 def = NULL;
183 if (!get_sha1(s, sha1)) {
184 show_rev(NORMAL, sha1, s);
185 return 1;
186 }
187 }
188 return 0;
189 }
190
191 static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
192 {
193 if (ref_excluded(ref_excludes, refname))
194 return 0;
195 show_rev(NORMAL, sha1, refname);
196 return 0;
197 }
198
199 static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
200 {
201 show_rev(REVERSED, sha1, refname);
202 return 0;
203 }
204
205 static int show_abbrev(const unsigned char *sha1, void *cb_data)
206 {
207 show_rev(NORMAL, sha1, NULL);
208 return 0;
209 }
210
211 static void show_datestring(const char *flag, const char *datestr)
212 {
213 static char buffer[100];
214
215 /* date handling requires both flags and revs */
216 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
217 return;
218 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
219 show(buffer);
220 }
221
222 static int show_file(const char *arg, int output_prefix)
223 {
224 show_default();
225 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
226 if (output_prefix) {
227 const char *prefix = startup_info->prefix;
228 show(prefix_filename(prefix,
229 prefix ? strlen(prefix) : 0,
230 arg));
231 } else
232 show(arg);
233 return 1;
234 }
235 return 0;
236 }
237
238 static int try_difference(const char *arg)
239 {
240 char *dotdot;
241 unsigned char sha1[20];
242 unsigned char end[20];
243 const char *next;
244 const char *this;
245 int symmetric;
246 static const char head_by_default[] = "HEAD";
247
248 if (!(dotdot = strstr(arg, "..")))
249 return 0;
250 next = dotdot + 2;
251 this = arg;
252 symmetric = (*next == '.');
253
254 *dotdot = 0;
255 next += symmetric;
256
257 if (!*next)
258 next = head_by_default;
259 if (dotdot == arg)
260 this = head_by_default;
261
262 if (this == head_by_default && next == head_by_default &&
263 !symmetric) {
264 /*
265 * Just ".."? That is not a range but the
266 * pathspec for the parent directory.
267 */
268 *dotdot = '.';
269 return 0;
270 }
271
272 if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
273 show_rev(NORMAL, end, next);
274 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
275 if (symmetric) {
276 struct commit_list *exclude;
277 struct commit *a, *b;
278 a = lookup_commit_reference(sha1);
279 b = lookup_commit_reference(end);
280 exclude = get_merge_bases(a, b, 1);
281 while (exclude) {
282 struct commit_list *n = exclude->next;
283 show_rev(REVERSED,
284 exclude->item->object.sha1,NULL);
285 free(exclude);
286 exclude = n;
287 }
288 }
289 return 1;
290 }
291 *dotdot = '.';
292 return 0;
293 }
294
295 static 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
303 if ((dotdot = strstr(arg, "^!")))
304 parents_only = 0;
305 else if ((dotdot = strstr(arg, "^@")))
306 parents_only = 1;
307
308 if (!dotdot || dotdot[2])
309 return 0;
310
311 *dotdot = 0;
312 if (get_sha1_committish(arg, sha1))
313 return 0;
314
315 if (!parents_only)
316 show_rev(NORMAL, sha1, arg);
317 commit = lookup_commit_reference(sha1);
318 for (parents = commit->parents; parents; parents = parents->next)
319 show_rev(parents_only ? NORMAL : REVERSED,
320 parents->item->object.sha1, arg);
321
322 return 1;
323 }
324
325 static int parseopt_dump(const struct option *o, const char *arg, int unset)
326 {
327 struct strbuf *parsed = o->value;
328 if (unset)
329 strbuf_addf(parsed, " --no-%s", o->long_name);
330 else if (o->short_name && (o->long_name == NULL || !stuck_long))
331 strbuf_addf(parsed, " -%c", o->short_name);
332 else
333 strbuf_addf(parsed, " --%s", o->long_name);
334 if (arg) {
335 if (!stuck_long)
336 strbuf_addch(parsed, ' ');
337 else if (o->long_name)
338 strbuf_addch(parsed, '=');
339 sq_quote_buf(parsed, arg);
340 }
341 return 0;
342 }
343
344 static const char *skipspaces(const char *s)
345 {
346 while (isspace(*s))
347 s++;
348 return s;
349 }
350
351 static int cmd_parseopt(int argc, const char **argv, const char *prefix)
352 {
353 static int keep_dashdash = 0, stop_at_non_option = 0;
354 static char const * const parseopt_usage[] = {
355 N_("git rev-parse --parseopt [options] -- [<args>...]"),
356 NULL
357 };
358 static struct option parseopt_opts[] = {
359 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
360 N_("keep the `--` passed as an arg")),
361 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
362 N_("stop parsing after the "
363 "first non-option argument")),
364 OPT_BOOL(0, "stuck-long", &stuck_long,
365 N_("output in stuck long form")),
366 OPT_END(),
367 };
368
369 struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
370 const char **usage = NULL;
371 struct option *opts = NULL;
372 int onb = 0, osz = 0, unb = 0, usz = 0;
373
374 strbuf_addstr(&parsed, "set --");
375 argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
376 PARSE_OPT_KEEP_DASHDASH);
377 if (argc < 1 || strcmp(argv[0], "--"))
378 usage_with_options(parseopt_usage, parseopt_opts);
379
380 /* get the usage up to the first line with a -- on it */
381 for (;;) {
382 if (strbuf_getline(&sb, stdin, '\n') == EOF)
383 die("premature end of input");
384 ALLOC_GROW(usage, unb + 1, usz);
385 if (!strcmp("--", sb.buf)) {
386 if (unb < 1)
387 die("no usage string given before the `--' separator");
388 usage[unb] = NULL;
389 break;
390 }
391 usage[unb++] = strbuf_detach(&sb, NULL);
392 }
393
394 /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
395 while (strbuf_getline(&sb, stdin, '\n') != EOF) {
396 const char *s;
397 struct option *o;
398
399 if (!sb.len)
400 continue;
401
402 ALLOC_GROW(opts, onb + 1, osz);
403 memset(opts + onb, 0, sizeof(opts[onb]));
404
405 o = &opts[onb++];
406 s = strchr(sb.buf, ' ');
407 if (!s || *sb.buf == ' ') {
408 o->type = OPTION_GROUP;
409 o->help = xstrdup(skipspaces(sb.buf));
410 continue;
411 }
412
413 o->type = OPTION_CALLBACK;
414 o->help = xstrdup(skipspaces(s));
415 o->value = &parsed;
416 o->flags = PARSE_OPT_NOARG;
417 o->callback = &parseopt_dump;
418 while (s > sb.buf && strchr("*=?!", s[-1])) {
419 switch (*--s) {
420 case '=':
421 o->flags &= ~PARSE_OPT_NOARG;
422 break;
423 case '?':
424 o->flags &= ~PARSE_OPT_NOARG;
425 o->flags |= PARSE_OPT_OPTARG;
426 break;
427 case '!':
428 o->flags |= PARSE_OPT_NONEG;
429 break;
430 case '*':
431 o->flags |= PARSE_OPT_HIDDEN;
432 break;
433 }
434 }
435
436 if (s - sb.buf == 1) /* short option only */
437 o->short_name = *sb.buf;
438 else if (sb.buf[1] != ',') /* long option only */
439 o->long_name = xmemdupz(sb.buf, s - sb.buf);
440 else {
441 o->short_name = *sb.buf;
442 o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
443 }
444 }
445 strbuf_release(&sb);
446
447 /* put an OPT_END() */
448 ALLOC_GROW(opts, onb + 1, osz);
449 memset(opts + onb, 0, sizeof(opts[onb]));
450 argc = parse_options(argc, argv, prefix, opts, usage,
451 (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
452 (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
453 PARSE_OPT_SHELL_EVAL);
454
455 strbuf_addf(&parsed, " --");
456 sq_quote_argv(&parsed, argv, 0);
457 puts(parsed.buf);
458 return 0;
459 }
460
461 static int cmd_sq_quote(int argc, const char **argv)
462 {
463 struct strbuf buf = STRBUF_INIT;
464
465 if (argc)
466 sq_quote_argv(&buf, argv, 0);
467 printf("%s\n", buf.buf);
468 strbuf_release(&buf);
469
470 return 0;
471 }
472
473 static void die_no_single_rev(int quiet)
474 {
475 if (quiet)
476 exit(1);
477 else
478 die("Needed a single revision");
479 }
480
481 static const char builtin_rev_parse_usage[] =
482 N_("git rev-parse --parseopt [options] -- [<args>...]\n"
483 " or: git rev-parse --sq-quote [<arg>...]\n"
484 " or: git rev-parse [options] [<arg>...]\n"
485 "\n"
486 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
487
488 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
489 {
490 int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
491 int output_prefix = 0;
492 unsigned char sha1[20];
493 const char *name = NULL;
494
495 if (argc > 1 && !strcmp("--parseopt", argv[1]))
496 return cmd_parseopt(argc - 1, argv + 1, prefix);
497
498 if (argc > 1 && !strcmp("--sq-quote", argv[1]))
499 return cmd_sq_quote(argc - 2, argv + 2);
500
501 if (argc > 1 && !strcmp("-h", argv[1]))
502 usage(builtin_rev_parse_usage);
503
504 prefix = setup_git_directory();
505 git_config(git_default_config, NULL);
506 for (i = 1; i < argc; i++) {
507 const char *arg = argv[i];
508
509 if (as_is) {
510 if (show_file(arg, output_prefix) && as_is < 2)
511 verify_filename(prefix, arg, 0);
512 continue;
513 }
514 if (!strcmp(arg,"-n")) {
515 if (++i >= argc)
516 die("-n requires an argument");
517 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
518 show(arg);
519 show(argv[i]);
520 }
521 continue;
522 }
523 if (!prefixcmp(arg, "-n")) {
524 if ((filter & DO_FLAGS) && (filter & DO_REVS))
525 show(arg);
526 continue;
527 }
528
529 if (*arg == '-') {
530 if (!strcmp(arg, "--")) {
531 as_is = 2;
532 /* Pass on the "--" if we show anything but files.. */
533 if (filter & (DO_FLAGS | DO_REVS))
534 show_file(arg, 0);
535 continue;
536 }
537 if (!strcmp(arg, "--default")) {
538 def = argv[i+1];
539 i++;
540 continue;
541 }
542 if (!strcmp(arg, "--prefix")) {
543 prefix = argv[i+1];
544 startup_info->prefix = prefix;
545 output_prefix = 1;
546 i++;
547 continue;
548 }
549 if (!strcmp(arg, "--revs-only")) {
550 filter &= ~DO_NOREV;
551 continue;
552 }
553 if (!strcmp(arg, "--no-revs")) {
554 filter &= ~DO_REVS;
555 continue;
556 }
557 if (!strcmp(arg, "--flags")) {
558 filter &= ~DO_NONFLAGS;
559 continue;
560 }
561 if (!strcmp(arg, "--no-flags")) {
562 filter &= ~DO_FLAGS;
563 continue;
564 }
565 if (!strcmp(arg, "--verify")) {
566 filter &= ~(DO_FLAGS|DO_NOREV);
567 verify = 1;
568 continue;
569 }
570 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
571 quiet = 1;
572 continue;
573 }
574 if (!strcmp(arg, "--short") ||
575 !prefixcmp(arg, "--short=")) {
576 filter &= ~(DO_FLAGS|DO_NOREV);
577 verify = 1;
578 abbrev = DEFAULT_ABBREV;
579 if (arg[7] == '=')
580 abbrev = strtoul(arg + 8, NULL, 10);
581 if (abbrev < MINIMUM_ABBREV)
582 abbrev = MINIMUM_ABBREV;
583 else if (40 <= abbrev)
584 abbrev = 40;
585 continue;
586 }
587 if (!strcmp(arg, "--sq")) {
588 output_sq = 1;
589 continue;
590 }
591 if (!strcmp(arg, "--not")) {
592 show_type ^= REVERSED;
593 continue;
594 }
595 if (!strcmp(arg, "--symbolic")) {
596 symbolic = SHOW_SYMBOLIC_ASIS;
597 continue;
598 }
599 if (!strcmp(arg, "--symbolic-full-name")) {
600 symbolic = SHOW_SYMBOLIC_FULL;
601 continue;
602 }
603 if (!prefixcmp(arg, "--abbrev-ref") &&
604 (!arg[12] || arg[12] == '=')) {
605 abbrev_ref = 1;
606 abbrev_ref_strict = warn_ambiguous_refs;
607 if (arg[12] == '=') {
608 if (!strcmp(arg + 13, "strict"))
609 abbrev_ref_strict = 1;
610 else if (!strcmp(arg + 13, "loose"))
611 abbrev_ref_strict = 0;
612 else
613 die("unknown mode for %s", arg);
614 }
615 continue;
616 }
617 if (!strcmp(arg, "--all")) {
618 for_each_ref(show_reference, NULL);
619 continue;
620 }
621 if (!prefixcmp(arg, "--disambiguate=")) {
622 for_each_abbrev(arg + 15, show_abbrev, NULL);
623 continue;
624 }
625 if (!strcmp(arg, "--bisect")) {
626 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
627 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
628 continue;
629 }
630 if (!prefixcmp(arg, "--branches=")) {
631 for_each_glob_ref_in(show_reference, arg + 11,
632 "refs/heads/", NULL);
633 clear_ref_exclusion(&ref_excludes);
634 continue;
635 }
636 if (!strcmp(arg, "--branches")) {
637 for_each_branch_ref(show_reference, NULL);
638 clear_ref_exclusion(&ref_excludes);
639 continue;
640 }
641 if (!prefixcmp(arg, "--tags=")) {
642 for_each_glob_ref_in(show_reference, arg + 7,
643 "refs/tags/", NULL);
644 clear_ref_exclusion(&ref_excludes);
645 continue;
646 }
647 if (!strcmp(arg, "--tags")) {
648 for_each_tag_ref(show_reference, NULL);
649 clear_ref_exclusion(&ref_excludes);
650 continue;
651 }
652 if (!prefixcmp(arg, "--glob=")) {
653 for_each_glob_ref(show_reference, arg + 7, NULL);
654 clear_ref_exclusion(&ref_excludes);
655 continue;
656 }
657 if (!prefixcmp(arg, "--remotes=")) {
658 for_each_glob_ref_in(show_reference, arg + 10,
659 "refs/remotes/", NULL);
660 clear_ref_exclusion(&ref_excludes);
661 continue;
662 }
663 if (!strcmp(arg, "--remotes")) {
664 for_each_remote_ref(show_reference, NULL);
665 clear_ref_exclusion(&ref_excludes);
666 continue;
667 }
668 if (!prefixcmp(arg, "--exclude=")) {
669 add_ref_exclusion(&ref_excludes, arg + 10);
670 continue;
671 }
672 if (!strcmp(arg, "--local-env-vars")) {
673 int i;
674 for (i = 0; local_repo_env[i]; i++)
675 printf("%s\n", local_repo_env[i]);
676 continue;
677 }
678 if (!strcmp(arg, "--show-toplevel")) {
679 const char *work_tree = get_git_work_tree();
680 if (work_tree)
681 puts(work_tree);
682 continue;
683 }
684 if (!strcmp(arg, "--show-prefix")) {
685 if (prefix)
686 puts(prefix);
687 else
688 putchar('\n');
689 continue;
690 }
691 if (!strcmp(arg, "--show-cdup")) {
692 const char *pfx = prefix;
693 if (!is_inside_work_tree()) {
694 const char *work_tree =
695 get_git_work_tree();
696 if (work_tree)
697 printf("%s\n", work_tree);
698 continue;
699 }
700 while (pfx) {
701 pfx = strchr(pfx, '/');
702 if (pfx) {
703 pfx++;
704 printf("../");
705 }
706 }
707 putchar('\n');
708 continue;
709 }
710 if (!strcmp(arg, "--git-dir")) {
711 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
712 static char cwd[PATH_MAX];
713 int len;
714 if (gitdir) {
715 puts(gitdir);
716 continue;
717 }
718 if (!prefix) {
719 puts(".git");
720 continue;
721 }
722 if (!getcwd(cwd, PATH_MAX))
723 die_errno("unable to get current working directory");
724 len = strlen(cwd);
725 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
726 continue;
727 }
728 if (!strcmp(arg, "--resolve-git-dir")) {
729 const char *gitdir = resolve_gitdir(argv[i+1]);
730 if (!gitdir)
731 die("not a gitdir '%s'", argv[i+1]);
732 puts(gitdir);
733 continue;
734 }
735 if (!strcmp(arg, "--is-inside-git-dir")) {
736 printf("%s\n", is_inside_git_dir() ? "true"
737 : "false");
738 continue;
739 }
740 if (!strcmp(arg, "--is-inside-work-tree")) {
741 printf("%s\n", is_inside_work_tree() ? "true"
742 : "false");
743 continue;
744 }
745 if (!strcmp(arg, "--is-bare-repository")) {
746 printf("%s\n", is_bare_repository() ? "true"
747 : "false");
748 continue;
749 }
750 if (!prefixcmp(arg, "--since=")) {
751 show_datestring("--max-age=", arg+8);
752 continue;
753 }
754 if (!prefixcmp(arg, "--after=")) {
755 show_datestring("--max-age=", arg+8);
756 continue;
757 }
758 if (!prefixcmp(arg, "--before=")) {
759 show_datestring("--min-age=", arg+9);
760 continue;
761 }
762 if (!prefixcmp(arg, "--until=")) {
763 show_datestring("--min-age=", arg+8);
764 continue;
765 }
766 if (show_flag(arg) && verify)
767 die_no_single_rev(quiet);
768 continue;
769 }
770
771 /* Not a flag argument */
772 if (try_difference(arg))
773 continue;
774 if (try_parent_shorthands(arg))
775 continue;
776 name = arg;
777 type = NORMAL;
778 if (*arg == '^') {
779 name++;
780 type = REVERSED;
781 }
782 if (!get_sha1(name, sha1)) {
783 if (verify)
784 revs_count++;
785 else
786 show_rev(type, sha1, name);
787 continue;
788 }
789 if (verify)
790 die_no_single_rev(quiet);
791 as_is = 1;
792 if (!show_file(arg, output_prefix))
793 continue;
794 verify_filename(prefix, arg, 1);
795 }
796 if (verify) {
797 if (revs_count == 1) {
798 show_rev(type, sha1, name);
799 return 0;
800 } else if (revs_count == 0 && show_default())
801 return 0;
802 die_no_single_rev(quiet);
803 } else
804 show_default();
805 return 0;
806 }