Merge branch 'jk/python-styles'
[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
13 #define DO_REVS         1
14 #define DO_NOREV        2
15 #define DO_FLAGS        4
16 #define DO_NONFLAGS     8
17 static int filter = ~0;
18
19 static const char *def;
20
21 #define NORMAL 0
22 #define REVERSED 1
23 static int show_type = NORMAL;
24
25 #define SHOW_SYMBOLIC_ASIS 1
26 #define SHOW_SYMBOLIC_FULL 2
27 static int symbolic;
28 static int abbrev;
29 static int abbrev_ref;
30 static int abbrev_ref_strict;
31 static int output_sq;
32
33 /*
34  * Some arguments are relevant "revision" arguments,
35  * others are about output format or other details.
36  * This sorts it all out.
37  */
38 static int is_rev_argument(const char *arg)
39 {
40         static const char *rev_args[] = {
41                 "--all",
42                 "--bisect",
43                 "--dense",
44                 "--branches=",
45                 "--branches",
46                 "--header",
47                 "--ignore-missing",
48                 "--max-age=",
49                 "--max-count=",
50                 "--min-age=",
51                 "--no-merges",
52                 "--min-parents=",
53                 "--no-min-parents",
54                 "--max-parents=",
55                 "--no-max-parents",
56                 "--objects",
57                 "--objects-edge",
58                 "--parents",
59                 "--pretty",
60                 "--remotes=",
61                 "--remotes",
62                 "--glob=",
63                 "--sparse",
64                 "--tags=",
65                 "--tags",
66                 "--topo-order",
67                 "--date-order",
68                 "--unpacked",
69                 NULL
70         };
71         const char **p = rev_args;
72
73         /* accept -<digit>, like traditional "head" */
74         if ((*arg == '-') && isdigit(arg[1]))
75                 return 1;
76
77         for (;;) {
78                 const char *str = *p++;
79                 int len;
80                 if (!str)
81                         return 0;
82                 len = strlen(str);
83                 if (!strcmp(arg, str) ||
84                     (str[len-1] == '=' && !strncmp(arg, str, len)))
85                         return 1;
86         }
87 }
88
89 /* Output argument as a string, either SQ or normal */
90 static void show(const char *arg)
91 {
92         if (output_sq) {
93                 int sq = '\'', ch;
94
95                 putchar(sq);
96                 while ((ch = *arg++)) {
97                         if (ch == sq)
98                                 fputs("'\\'", stdout);
99                         putchar(ch);
100                 }
101                 putchar(sq);
102                 putchar(' ');
103         }
104         else
105                 puts(arg);
106 }
107
108 /* Like show(), but with a negation prefix according to type */
109 static void show_with_type(int type, const char *arg)
110 {
111         if (type != show_type)
112                 putchar('^');
113         show(arg);
114 }
115
116 /* Output a revision, only if filter allows it */
117 static void show_rev(int type, const unsigned char *sha1, const char *name)
118 {
119         if (!(filter & DO_REVS))
120                 return;
121         def = NULL;
122
123         if ((symbolic || abbrev_ref) && name) {
124                 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
125                         unsigned char discard[20];
126                         char *full;
127
128                         switch (dwim_ref(name, strlen(name), discard, &full)) {
129                         case 0:
130                                 /*
131                                  * Not found -- not a ref.  We could
132                                  * emit "name" here, but symbolic-full
133                                  * users are interested in finding the
134                                  * refs spelled in full, and they would
135                                  * need to filter non-refs if we did so.
136                                  */
137                                 break;
138                         case 1: /* happy */
139                                 if (abbrev_ref)
140                                         full = shorten_unambiguous_ref(full,
141                                                 abbrev_ref_strict);
142                                 show_with_type(type, full);
143                                 break;
144                         default: /* ambiguous */
145                                 error("refname '%s' is ambiguous", name);
146                                 break;
147                         }
148                 } else {
149                         show_with_type(type, name);
150                 }
151         }
152         else if (abbrev)
153                 show_with_type(type, find_unique_abbrev(sha1, abbrev));
154         else
155                 show_with_type(type, sha1_to_hex(sha1));
156 }
157
158 /* Output a flag, only if filter allows it. */
159 static int show_flag(const char *arg)
160 {
161         if (!(filter & DO_FLAGS))
162                 return 0;
163         if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
164                 show(arg);
165                 return 1;
166         }
167         return 0;
168 }
169
170 static int show_default(void)
171 {
172         const char *s = def;
173
174         if (s) {
175                 unsigned char sha1[20];
176
177                 def = NULL;
178                 if (!get_sha1(s, sha1)) {
179                         show_rev(NORMAL, sha1, s);
180                         return 1;
181                 }
182         }
183         return 0;
184 }
185
186 static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
187 {
188         show_rev(NORMAL, sha1, refname);
189         return 0;
190 }
191
192 static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
193 {
194         show_rev(REVERSED, sha1, refname);
195         return 0;
196 }
197
198 static int show_abbrev(const unsigned char *sha1, void *cb_data)
199 {
200         show_rev(NORMAL, sha1, NULL);
201         return 0;
202 }
203
204 static void show_datestring(const char *flag, const char *datestr)
205 {
206         static char buffer[100];
207
208         /* date handling requires both flags and revs */
209         if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
210                 return;
211         snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
212         show(buffer);
213 }
214
215 static int show_file(const char *arg)
216 {
217         show_default();
218         if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
219                 show(arg);
220                 return 1;
221         }
222         return 0;
223 }
224
225 static int try_difference(const char *arg)
226 {
227         char *dotdot;
228         unsigned char sha1[20];
229         unsigned char end[20];
230         const char *next;
231         const char *this;
232         int symmetric;
233         static const char head_by_default[] = "HEAD";
234
235         if (!(dotdot = strstr(arg, "..")))
236                 return 0;
237         next = dotdot + 2;
238         this = arg;
239         symmetric = (*next == '.');
240
241         *dotdot = 0;
242         next += symmetric;
243
244         if (!*next)
245                 next = head_by_default;
246         if (dotdot == arg)
247                 this = head_by_default;
248
249         if (this == head_by_default && next == head_by_default &&
250             !symmetric) {
251                 /*
252                  * Just ".."?  That is not a range but the
253                  * pathspec for the parent directory.
254                  */
255                 *dotdot = '.';
256                 return 0;
257         }
258
259         if (!get_sha1_committish(this, sha1) && !get_sha1_committish(next, end)) {
260                 show_rev(NORMAL, end, next);
261                 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
262                 if (symmetric) {
263                         struct commit_list *exclude;
264                         struct commit *a, *b;
265                         a = lookup_commit_reference(sha1);
266                         b = lookup_commit_reference(end);
267                         exclude = get_merge_bases(a, b, 1);
268                         while (exclude) {
269                                 struct commit_list *n = exclude->next;
270                                 show_rev(REVERSED,
271                                          exclude->item->object.sha1,NULL);
272                                 free(exclude);
273                                 exclude = n;
274                         }
275                 }
276                 return 1;
277         }
278         *dotdot = '.';
279         return 0;
280 }
281
282 static int try_parent_shorthands(const char *arg)
283 {
284         char *dotdot;
285         unsigned char sha1[20];
286         struct commit *commit;
287         struct commit_list *parents;
288         int parents_only;
289
290         if ((dotdot = strstr(arg, "^!")))
291                 parents_only = 0;
292         else if ((dotdot = strstr(arg, "^@")))
293                 parents_only = 1;
294
295         if (!dotdot || dotdot[2])
296                 return 0;
297
298         *dotdot = 0;
299         if (get_sha1_committish(arg, sha1))
300                 return 0;
301
302         if (!parents_only)
303                 show_rev(NORMAL, sha1, arg);
304         commit = lookup_commit_reference(sha1);
305         for (parents = commit->parents; parents; parents = parents->next)
306                 show_rev(parents_only ? NORMAL : REVERSED,
307                                 parents->item->object.sha1, arg);
308
309         return 1;
310 }
311
312 static int parseopt_dump(const struct option *o, const char *arg, int unset)
313 {
314         struct strbuf *parsed = o->value;
315         if (unset)
316                 strbuf_addf(parsed, " --no-%s", o->long_name);
317         else if (o->short_name)
318                 strbuf_addf(parsed, " -%c", o->short_name);
319         else
320                 strbuf_addf(parsed, " --%s", o->long_name);
321         if (arg) {
322                 strbuf_addch(parsed, ' ');
323                 sq_quote_buf(parsed, arg);
324         }
325         return 0;
326 }
327
328 static const char *skipspaces(const char *s)
329 {
330         while (isspace(*s))
331                 s++;
332         return s;
333 }
334
335 static int cmd_parseopt(int argc, const char **argv, const char *prefix)
336 {
337         static int keep_dashdash = 0, stop_at_non_option = 0;
338         static char const * const parseopt_usage[] = {
339                 N_("git rev-parse --parseopt [options] -- [<args>...]"),
340                 NULL
341         };
342         static struct option parseopt_opts[] = {
343                 OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
344                                         N_("keep the `--` passed as an arg")),
345                 OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option,
346                                         N_("stop parsing after the "
347                                            "first non-option argument")),
348                 OPT_END(),
349         };
350
351         struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
352         const char **usage = NULL;
353         struct option *opts = NULL;
354         int onb = 0, osz = 0, unb = 0, usz = 0;
355
356         strbuf_addstr(&parsed, "set --");
357         argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
358                              PARSE_OPT_KEEP_DASHDASH);
359         if (argc < 1 || strcmp(argv[0], "--"))
360                 usage_with_options(parseopt_usage, parseopt_opts);
361
362         /* get the usage up to the first line with a -- on it */
363         for (;;) {
364                 if (strbuf_getline(&sb, stdin, '\n') == EOF)
365                         die("premature end of input");
366                 ALLOC_GROW(usage, unb + 1, usz);
367                 if (!strcmp("--", sb.buf)) {
368                         if (unb < 1)
369                                 die("no usage string given before the `--' separator");
370                         usage[unb] = NULL;
371                         break;
372                 }
373                 usage[unb++] = strbuf_detach(&sb, NULL);
374         }
375
376         /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
377         while (strbuf_getline(&sb, stdin, '\n') != EOF) {
378                 const char *s;
379                 struct option *o;
380
381                 if (!sb.len)
382                         continue;
383
384                 ALLOC_GROW(opts, onb + 1, osz);
385                 memset(opts + onb, 0, sizeof(opts[onb]));
386
387                 o = &opts[onb++];
388                 s = strchr(sb.buf, ' ');
389                 if (!s || *sb.buf == ' ') {
390                         o->type = OPTION_GROUP;
391                         o->help = xstrdup(skipspaces(sb.buf));
392                         continue;
393                 }
394
395                 o->type = OPTION_CALLBACK;
396                 o->help = xstrdup(skipspaces(s));
397                 o->value = &parsed;
398                 o->flags = PARSE_OPT_NOARG;
399                 o->callback = &parseopt_dump;
400                 while (s > sb.buf && strchr("*=?!", s[-1])) {
401                         switch (*--s) {
402                         case '=':
403                                 o->flags &= ~PARSE_OPT_NOARG;
404                                 break;
405                         case '?':
406                                 o->flags &= ~PARSE_OPT_NOARG;
407                                 o->flags |= PARSE_OPT_OPTARG;
408                                 break;
409                         case '!':
410                                 o->flags |= PARSE_OPT_NONEG;
411                                 break;
412                         case '*':
413                                 o->flags |= PARSE_OPT_HIDDEN;
414                                 break;
415                         }
416                 }
417
418                 if (s - sb.buf == 1) /* short option only */
419                         o->short_name = *sb.buf;
420                 else if (sb.buf[1] != ',') /* long option only */
421                         o->long_name = xmemdupz(sb.buf, s - sb.buf);
422                 else {
423                         o->short_name = *sb.buf;
424                         o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
425                 }
426         }
427         strbuf_release(&sb);
428
429         /* put an OPT_END() */
430         ALLOC_GROW(opts, onb + 1, osz);
431         memset(opts + onb, 0, sizeof(opts[onb]));
432         argc = parse_options(argc, argv, prefix, opts, usage,
433                         (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
434                         (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
435                         PARSE_OPT_SHELL_EVAL);
436
437         strbuf_addf(&parsed, " --");
438         sq_quote_argv(&parsed, argv, 0);
439         puts(parsed.buf);
440         return 0;
441 }
442
443 static int cmd_sq_quote(int argc, const char **argv)
444 {
445         struct strbuf buf = STRBUF_INIT;
446
447         if (argc)
448                 sq_quote_argv(&buf, argv, 0);
449         printf("%s\n", buf.buf);
450         strbuf_release(&buf);
451
452         return 0;
453 }
454
455 static void die_no_single_rev(int quiet)
456 {
457         if (quiet)
458                 exit(1);
459         else
460                 die("Needed a single revision");
461 }
462
463 static const char builtin_rev_parse_usage[] =
464 N_("git rev-parse --parseopt [options] -- [<args>...]\n"
465    "   or: git rev-parse --sq-quote [<arg>...]\n"
466    "   or: git rev-parse [options] [<arg>...]\n"
467    "\n"
468    "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
469
470 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
471 {
472         int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
473         unsigned char sha1[20];
474         const char *name = NULL;
475
476         if (argc > 1 && !strcmp("--parseopt", argv[1]))
477                 return cmd_parseopt(argc - 1, argv + 1, prefix);
478
479         if (argc > 1 && !strcmp("--sq-quote", argv[1]))
480                 return cmd_sq_quote(argc - 2, argv + 2);
481
482         if (argc == 2 && !strcmp("--local-env-vars", argv[1])) {
483                 int i;
484                 for (i = 0; local_repo_env[i]; i++)
485                         printf("%s\n", local_repo_env[i]);
486                 return 0;
487         }
488
489         if (argc > 2 && !strcmp(argv[1], "--resolve-git-dir")) {
490                 const char *gitdir = resolve_gitdir(argv[2]);
491                 if (!gitdir)
492                         die("not a gitdir '%s'", argv[2]);
493                 puts(gitdir);
494                 return 0;
495         }
496
497         if (argc > 1 && !strcmp("-h", argv[1]))
498                 usage(builtin_rev_parse_usage);
499
500         prefix = setup_git_directory();
501         git_config(git_default_config, NULL);
502         for (i = 1; i < argc; i++) {
503                 const char *arg = argv[i];
504
505                 if (as_is) {
506                         if (show_file(arg) && as_is < 2)
507                                 verify_filename(prefix, arg, 0);
508                         continue;
509                 }
510                 if (!strcmp(arg,"-n")) {
511                         if (++i >= argc)
512                                 die("-n requires an argument");
513                         if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
514                                 show(arg);
515                                 show(argv[i]);
516                         }
517                         continue;
518                 }
519                 if (!prefixcmp(arg, "-n")) {
520                         if ((filter & DO_FLAGS) && (filter & DO_REVS))
521                                 show(arg);
522                         continue;
523                 }
524
525                 if (*arg == '-') {
526                         if (!strcmp(arg, "--")) {
527                                 as_is = 2;
528                                 /* Pass on the "--" if we show anything but files.. */
529                                 if (filter & (DO_FLAGS | DO_REVS))
530                                         show_file(arg);
531                                 continue;
532                         }
533                         if (!strcmp(arg, "--default")) {
534                                 def = argv[i+1];
535                                 i++;
536                                 continue;
537                         }
538                         if (!strcmp(arg, "--revs-only")) {
539                                 filter &= ~DO_NOREV;
540                                 continue;
541                         }
542                         if (!strcmp(arg, "--no-revs")) {
543                                 filter &= ~DO_REVS;
544                                 continue;
545                         }
546                         if (!strcmp(arg, "--flags")) {
547                                 filter &= ~DO_NONFLAGS;
548                                 continue;
549                         }
550                         if (!strcmp(arg, "--no-flags")) {
551                                 filter &= ~DO_FLAGS;
552                                 continue;
553                         }
554                         if (!strcmp(arg, "--verify")) {
555                                 filter &= ~(DO_FLAGS|DO_NOREV);
556                                 verify = 1;
557                                 continue;
558                         }
559                         if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
560                                 quiet = 1;
561                                 continue;
562                         }
563                         if (!strcmp(arg, "--short") ||
564                             !prefixcmp(arg, "--short=")) {
565                                 filter &= ~(DO_FLAGS|DO_NOREV);
566                                 verify = 1;
567                                 abbrev = DEFAULT_ABBREV;
568                                 if (arg[7] == '=')
569                                         abbrev = strtoul(arg + 8, NULL, 10);
570                                 if (abbrev < MINIMUM_ABBREV)
571                                         abbrev = MINIMUM_ABBREV;
572                                 else if (40 <= abbrev)
573                                         abbrev = 40;
574                                 continue;
575                         }
576                         if (!strcmp(arg, "--sq")) {
577                                 output_sq = 1;
578                                 continue;
579                         }
580                         if (!strcmp(arg, "--not")) {
581                                 show_type ^= REVERSED;
582                                 continue;
583                         }
584                         if (!strcmp(arg, "--symbolic")) {
585                                 symbolic = SHOW_SYMBOLIC_ASIS;
586                                 continue;
587                         }
588                         if (!strcmp(arg, "--symbolic-full-name")) {
589                                 symbolic = SHOW_SYMBOLIC_FULL;
590                                 continue;
591                         }
592                         if (!prefixcmp(arg, "--abbrev-ref") &&
593                             (!arg[12] || arg[12] == '=')) {
594                                 abbrev_ref = 1;
595                                 abbrev_ref_strict = warn_ambiguous_refs;
596                                 if (arg[12] == '=') {
597                                         if (!strcmp(arg + 13, "strict"))
598                                                 abbrev_ref_strict = 1;
599                                         else if (!strcmp(arg + 13, "loose"))
600                                                 abbrev_ref_strict = 0;
601                                         else
602                                                 die("unknown mode for %s", arg);
603                                 }
604                                 continue;
605                         }
606                         if (!strcmp(arg, "--all")) {
607                                 for_each_ref(show_reference, NULL);
608                                 continue;
609                         }
610                         if (!prefixcmp(arg, "--disambiguate=")) {
611                                 for_each_abbrev(arg + 15, show_abbrev, NULL);
612                                 continue;
613                         }
614                         if (!strcmp(arg, "--bisect")) {
615                                 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
616                                 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
617                                 continue;
618                         }
619                         if (!prefixcmp(arg, "--branches=")) {
620                                 for_each_glob_ref_in(show_reference, arg + 11,
621                                         "refs/heads/", NULL);
622                                 continue;
623                         }
624                         if (!strcmp(arg, "--branches")) {
625                                 for_each_branch_ref(show_reference, NULL);
626                                 continue;
627                         }
628                         if (!prefixcmp(arg, "--tags=")) {
629                                 for_each_glob_ref_in(show_reference, arg + 7,
630                                         "refs/tags/", NULL);
631                                 continue;
632                         }
633                         if (!strcmp(arg, "--tags")) {
634                                 for_each_tag_ref(show_reference, NULL);
635                                 continue;
636                         }
637                         if (!prefixcmp(arg, "--glob=")) {
638                                 for_each_glob_ref(show_reference, arg + 7, NULL);
639                                 continue;
640                         }
641                         if (!prefixcmp(arg, "--remotes=")) {
642                                 for_each_glob_ref_in(show_reference, arg + 10,
643                                         "refs/remotes/", NULL);
644                                 continue;
645                         }
646                         if (!strcmp(arg, "--remotes")) {
647                                 for_each_remote_ref(show_reference, NULL);
648                                 continue;
649                         }
650                         if (!strcmp(arg, "--show-toplevel")) {
651                                 const char *work_tree = get_git_work_tree();
652                                 if (work_tree)
653                                         puts(work_tree);
654                                 continue;
655                         }
656                         if (!strcmp(arg, "--show-prefix")) {
657                                 if (prefix)
658                                         puts(prefix);
659                                 else
660                                         putchar('\n');
661                                 continue;
662                         }
663                         if (!strcmp(arg, "--show-cdup")) {
664                                 const char *pfx = prefix;
665                                 if (!is_inside_work_tree()) {
666                                         const char *work_tree =
667                                                 get_git_work_tree();
668                                         if (work_tree)
669                                                 printf("%s\n", work_tree);
670                                         continue;
671                                 }
672                                 while (pfx) {
673                                         pfx = strchr(pfx, '/');
674                                         if (pfx) {
675                                                 pfx++;
676                                                 printf("../");
677                                         }
678                                 }
679                                 putchar('\n');
680                                 continue;
681                         }
682                         if (!strcmp(arg, "--git-dir")) {
683                                 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
684                                 static char cwd[PATH_MAX];
685                                 int len;
686                                 if (gitdir) {
687                                         puts(gitdir);
688                                         continue;
689                                 }
690                                 if (!prefix) {
691                                         puts(".git");
692                                         continue;
693                                 }
694                                 if (!getcwd(cwd, PATH_MAX))
695                                         die_errno("unable to get current working directory");
696                                 len = strlen(cwd);
697                                 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
698                                 continue;
699                         }
700                         if (!strcmp(arg, "--is-inside-git-dir")) {
701                                 printf("%s\n", is_inside_git_dir() ? "true"
702                                                 : "false");
703                                 continue;
704                         }
705                         if (!strcmp(arg, "--is-inside-work-tree")) {
706                                 printf("%s\n", is_inside_work_tree() ? "true"
707                                                 : "false");
708                                 continue;
709                         }
710                         if (!strcmp(arg, "--is-bare-repository")) {
711                                 printf("%s\n", is_bare_repository() ? "true"
712                                                 : "false");
713                                 continue;
714                         }
715                         if (!prefixcmp(arg, "--since=")) {
716                                 show_datestring("--max-age=", arg+8);
717                                 continue;
718                         }
719                         if (!prefixcmp(arg, "--after=")) {
720                                 show_datestring("--max-age=", arg+8);
721                                 continue;
722                         }
723                         if (!prefixcmp(arg, "--before=")) {
724                                 show_datestring("--min-age=", arg+9);
725                                 continue;
726                         }
727                         if (!prefixcmp(arg, "--until=")) {
728                                 show_datestring("--min-age=", arg+8);
729                                 continue;
730                         }
731                         if (show_flag(arg) && verify)
732                                 die_no_single_rev(quiet);
733                         continue;
734                 }
735
736                 /* Not a flag argument */
737                 if (try_difference(arg))
738                         continue;
739                 if (try_parent_shorthands(arg))
740                         continue;
741                 name = arg;
742                 type = NORMAL;
743                 if (*arg == '^') {
744                         name++;
745                         type = REVERSED;
746                 }
747                 if (!get_sha1(name, sha1)) {
748                         if (verify)
749                                 revs_count++;
750                         else
751                                 show_rev(type, sha1, name);
752                         continue;
753                 }
754                 if (verify)
755                         die_no_single_rev(quiet);
756                 as_is = 1;
757                 if (!show_file(arg))
758                         continue;
759                 verify_filename(prefix, arg, 1);
760         }
761         if (verify) {
762                 if (revs_count == 1) {
763                         show_rev(type, sha1, name);
764                         return 0;
765                 } else if (revs_count == 0 && show_default())
766                         return 0;
767                 die_no_single_rev(quiet);
768         } else
769                 show_default();
770         return 0;
771 }