Clarify git-cherry documentation.
[git] / ls-files.c
1 /*
2  * This merges the file listing in the directory cache index
3  * with the actual working directory list, and shows different
4  * combinations of the two.
5  *
6  * Copyright (C) Linus Torvalds, 2005
7  */
8 #include <dirent.h>
9 #include <fnmatch.h>
10
11 #include "cache.h"
12 #include "quote.h"
13
14 static int abbrev = 0;
15 static int show_deleted = 0;
16 static int show_cached = 0;
17 static int show_others = 0;
18 static int show_ignored = 0;
19 static int show_stage = 0;
20 static int show_unmerged = 0;
21 static int show_modified = 0;
22 static int show_killed = 0;
23 static int show_other_directories = 0;
24 static int hide_empty_directories = 0;
25 static int show_valid_bit = 0;
26 static int line_terminator = '\n';
27
28 static int prefix_len = 0, prefix_offset = 0;
29 static const char *prefix = NULL;
30 static const char **pathspec = NULL;
31 static int error_unmatch = 0;
32 static char *ps_matched = NULL;
33
34 static const char *tag_cached = "";
35 static const char *tag_unmerged = "";
36 static const char *tag_removed = "";
37 static const char *tag_other = "";
38 static const char *tag_killed = "";
39 static const char *tag_modified = "";
40
41 static const char *exclude_per_dir = NULL;
42
43 /* We maintain three exclude pattern lists:
44  * EXC_CMDL lists patterns explicitly given on the command line.
45  * EXC_DIRS lists patterns obtained from per-directory ignore files.
46  * EXC_FILE lists patterns from fallback ignore files.
47  */
48 #define EXC_CMDL 0
49 #define EXC_DIRS 1
50 #define EXC_FILE 2
51 static struct exclude_list {
52         int nr;
53         int alloc;
54         struct exclude {
55                 const char *pattern;
56                 const char *base;
57                 int baselen;
58         } **excludes;
59 } exclude_list[3];
60
61 static void add_exclude(const char *string, const char *base,
62                         int baselen, struct exclude_list *which)
63 {
64         struct exclude *x = xmalloc(sizeof (*x));
65
66         x->pattern = string;
67         x->base = base;
68         x->baselen = baselen;
69         if (which->nr == which->alloc) {
70                 which->alloc = alloc_nr(which->alloc);
71                 which->excludes = realloc(which->excludes,
72                                           which->alloc * sizeof(x));
73         }
74         which->excludes[which->nr++] = x;
75 }
76
77 static int add_excludes_from_file_1(const char *fname,
78                                     const char *base,
79                                     int baselen,
80                                     struct exclude_list *which)
81 {
82         int fd, i;
83         long size;
84         char *buf, *entry;
85
86         fd = open(fname, O_RDONLY);
87         if (fd < 0)
88                 goto err;
89         size = lseek(fd, 0, SEEK_END);
90         if (size < 0)
91                 goto err;
92         lseek(fd, 0, SEEK_SET);
93         if (size == 0) {
94                 close(fd);
95                 return 0;
96         }
97         buf = xmalloc(size+1);
98         if (read(fd, buf, size) != size)
99                 goto err;
100         close(fd);
101
102         buf[size++] = '\n';
103         entry = buf;
104         for (i = 0; i < size; i++) {
105                 if (buf[i] == '\n') {
106                         if (entry != buf + i && entry[0] != '#') {
107                                 buf[i - (i && buf[i-1] == '\r')] = 0;
108                                 add_exclude(entry, base, baselen, which);
109                         }
110                         entry = buf + i + 1;
111                 }
112         }
113         return 0;
114
115  err:
116         if (0 <= fd)
117                 close(fd);
118         return -1;
119 }
120
121 static void add_excludes_from_file(const char *fname)
122 {
123         if (add_excludes_from_file_1(fname, "", 0,
124                                      &exclude_list[EXC_FILE]) < 0)
125                 die("cannot use %s as an exclude file", fname);
126 }
127
128 static int push_exclude_per_directory(const char *base, int baselen)
129 {
130         char exclude_file[PATH_MAX];
131         struct exclude_list *el = &exclude_list[EXC_DIRS];
132         int current_nr = el->nr;
133
134         if (exclude_per_dir) {
135                 memcpy(exclude_file, base, baselen);
136                 strcpy(exclude_file + baselen, exclude_per_dir);
137                 add_excludes_from_file_1(exclude_file, base, baselen, el);
138         }
139         return current_nr;
140 }
141
142 static void pop_exclude_per_directory(int stk)
143 {
144         struct exclude_list *el = &exclude_list[EXC_DIRS];
145
146         while (stk < el->nr)
147                 free(el->excludes[--el->nr]);
148 }
149
150 /* Scan the list and let the last match determines the fate.
151  * Return 1 for exclude, 0 for include and -1 for undecided.
152  */
153 static int excluded_1(const char *pathname,
154                       int pathlen,
155                       struct exclude_list *el)
156 {
157         int i;
158
159         if (el->nr) {
160                 for (i = el->nr - 1; 0 <= i; i--) {
161                         struct exclude *x = el->excludes[i];
162                         const char *exclude = x->pattern;
163                         int to_exclude = 1;
164
165                         if (*exclude == '!') {
166                                 to_exclude = 0;
167                                 exclude++;
168                         }
169
170                         if (!strchr(exclude, '/')) {
171                                 /* match basename */
172                                 const char *basename = strrchr(pathname, '/');
173                                 basename = (basename) ? basename+1 : pathname;
174                                 if (fnmatch(exclude, basename, 0) == 0)
175                                         return to_exclude;
176                         }
177                         else {
178                                 /* match with FNM_PATHNAME:
179                                  * exclude has base (baselen long) implicitly
180                                  * in front of it.
181                                  */
182                                 int baselen = x->baselen;
183                                 if (*exclude == '/')
184                                         exclude++;
185
186                                 if (pathlen < baselen ||
187                                     (baselen && pathname[baselen-1] != '/') ||
188                                     strncmp(pathname, x->base, baselen))
189                                     continue;
190
191                                 if (fnmatch(exclude, pathname+baselen,
192                                             FNM_PATHNAME) == 0)
193                                         return to_exclude;
194                         }
195                 }
196         }
197         return -1; /* undecided */
198 }
199
200 static int excluded(const char *pathname)
201 {
202         int pathlen = strlen(pathname);
203         int st;
204
205         for (st = EXC_CMDL; st <= EXC_FILE; st++) {
206                 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
207                 case 0:
208                         return 0;
209                 case 1:
210                         return 1;
211                 }
212         }
213         return 0;
214 }
215
216 struct nond_on_fs {
217         int len;
218         char name[FLEX_ARRAY]; /* more */
219 };
220
221 static struct nond_on_fs **dir;
222 static int nr_dir;
223 static int dir_alloc;
224
225 static void add_name(const char *pathname, int len)
226 {
227         struct nond_on_fs *ent;
228
229         if (cache_name_pos(pathname, len) >= 0)
230                 return;
231
232         if (nr_dir == dir_alloc) {
233                 dir_alloc = alloc_nr(dir_alloc);
234                 dir = xrealloc(dir, dir_alloc*sizeof(ent));
235         }
236         ent = xmalloc(sizeof(*ent) + len + 1);
237         ent->len = len;
238         memcpy(ent->name, pathname, len);
239         ent->name[len] = 0;
240         dir[nr_dir++] = ent;
241 }
242
243 static int dir_exists(const char *dirname, int len)
244 {
245         int pos = cache_name_pos(dirname, len);
246         if (pos >= 0)
247                 return 1;
248         pos = -pos-1;
249         if (pos >= active_nr) /* can't */
250                 return 0;
251         return !strncmp(active_cache[pos]->name, dirname, len);
252 }
253
254 /*
255  * Read a directory tree. We currently ignore anything but
256  * directories, regular files and symlinks. That's because git
257  * doesn't handle them at all yet. Maybe that will change some
258  * day.
259  *
260  * Also, we ignore the name ".git" (even if it is not a directory).
261  * That likely will not change.
262  */
263 static int read_directory(const char *path, const char *base, int baselen)
264 {
265         DIR *fdir = opendir(path);
266         int contents = 0;
267
268         if (fdir) {
269                 int exclude_stk;
270                 struct dirent *de;
271                 char fullname[MAXPATHLEN + 1];
272                 memcpy(fullname, base, baselen);
273
274                 exclude_stk = push_exclude_per_directory(base, baselen);
275
276                 while ((de = readdir(fdir)) != NULL) {
277                         int len;
278
279                         if ((de->d_name[0] == '.') &&
280                             (de->d_name[1] == 0 ||
281                              !strcmp(de->d_name + 1, ".") ||
282                              !strcmp(de->d_name + 1, "git")))
283                                 continue;
284                         len = strlen(de->d_name);
285                         memcpy(fullname + baselen, de->d_name, len+1);
286                         if (excluded(fullname) != show_ignored) {
287                                 if (!show_ignored || DTYPE(de) != DT_DIR) {
288                                         continue;
289                                 }
290                         }
291
292                         switch (DTYPE(de)) {
293                         struct stat st;
294                         int subdir, rewind_base;
295                         default:
296                                 continue;
297                         case DT_UNKNOWN:
298                                 if (lstat(fullname, &st))
299                                         continue;
300                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
301                                         break;
302                                 if (!S_ISDIR(st.st_mode))
303                                         continue;
304                                 /* fallthrough */
305                         case DT_DIR:
306                                 memcpy(fullname + baselen + len, "/", 2);
307                                 len++;
308                                 rewind_base = nr_dir;
309                                 subdir = read_directory(fullname, fullname,
310                                                         baselen + len);
311                                 if (show_other_directories &&
312                                     (subdir || !hide_empty_directories) &&
313                                     !dir_exists(fullname, baselen + len)) {
314                                         // Rewind the read subdirectory
315                                         while (nr_dir > rewind_base)
316                                                 free(dir[--nr_dir]);
317                                         break;
318                                 }
319                                 contents += subdir;
320                                 continue;
321                         case DT_REG:
322                         case DT_LNK:
323                                 break;
324                         }
325                         add_name(fullname, baselen + len);
326                         contents++;
327                 }
328                 closedir(fdir);
329
330                 pop_exclude_per_directory(exclude_stk);
331         }
332
333         return contents;
334 }
335
336 static int cmp_name(const void *p1, const void *p2)
337 {
338         const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
339         const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
340
341         return cache_name_compare(e1->name, e1->len,
342                                   e2->name, e2->len);
343 }
344
345 /*
346  * Match a pathspec against a filename. The first "len" characters
347  * are the common prefix
348  */
349 static int match(const char **spec, char *ps_matched,
350                  const char *filename, int len)
351 {
352         const char *m;
353
354         while ((m = *spec++) != NULL) {
355                 int matchlen = strlen(m + len);
356
357                 if (!matchlen)
358                         goto matched;
359                 if (!strncmp(m + len, filename + len, matchlen)) {
360                         if (m[len + matchlen - 1] == '/')
361                                 goto matched;
362                         switch (filename[len + matchlen]) {
363                         case '/': case '\0':
364                                 goto matched;
365                         }
366                 }
367                 if (!fnmatch(m + len, filename + len, 0))
368                         goto matched;
369                 if (ps_matched)
370                         ps_matched++;
371                 continue;
372         matched:
373                 if (ps_matched)
374                         *ps_matched = 1;
375                 return 1;
376         }
377         return 0;
378 }
379
380 static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
381 {
382         int len = prefix_len;
383         int offset = prefix_offset;
384
385         if (len >= ent->len)
386                 die("git-ls-files: internal error - directory entry not superset of prefix");
387
388         if (pathspec && !match(pathspec, ps_matched, ent->name, len))
389                 return;
390
391         fputs(tag, stdout);
392         write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
393         putchar(line_terminator);
394 }
395
396 static void show_other_files(void)
397 {
398         int i;
399         for (i = 0; i < nr_dir; i++) {
400                 /* We should not have a matching entry, but we
401                  * may have an unmerged entry for this path.
402                  */
403                 struct nond_on_fs *ent = dir[i];
404                 int pos = cache_name_pos(ent->name, ent->len);
405                 struct cache_entry *ce;
406                 if (0 <= pos)
407                         die("bug in show-other-files");
408                 pos = -pos - 1;
409                 if (pos < active_nr) { 
410                         ce = active_cache[pos];
411                         if (ce_namelen(ce) == ent->len &&
412                             !memcmp(ce->name, ent->name, ent->len))
413                                 continue; /* Yup, this one exists unmerged */
414                 }
415                 show_dir_entry(tag_other, ent);
416         }
417 }
418
419 static void show_killed_files(void)
420 {
421         int i;
422         for (i = 0; i < nr_dir; i++) {
423                 struct nond_on_fs *ent = dir[i];
424                 char *cp, *sp;
425                 int pos, len, killed = 0;
426
427                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
428                         sp = strchr(cp, '/');
429                         if (!sp) {
430                                 /* If ent->name is prefix of an entry in the
431                                  * cache, it will be killed.
432                                  */
433                                 pos = cache_name_pos(ent->name, ent->len);
434                                 if (0 <= pos)
435                                         die("bug in show-killed-files");
436                                 pos = -pos - 1;
437                                 while (pos < active_nr &&
438                                        ce_stage(active_cache[pos]))
439                                         pos++; /* skip unmerged */
440                                 if (active_nr <= pos)
441                                         break;
442                                 /* pos points at a name immediately after
443                                  * ent->name in the cache.  Does it expect
444                                  * ent->name to be a directory?
445                                  */
446                                 len = ce_namelen(active_cache[pos]);
447                                 if ((ent->len < len) &&
448                                     !strncmp(active_cache[pos]->name,
449                                              ent->name, ent->len) &&
450                                     active_cache[pos]->name[ent->len] == '/')
451                                         killed = 1;
452                                 break;
453                         }
454                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
455                                 /* If any of the leading directories in
456                                  * ent->name is registered in the cache,
457                                  * ent->name will be killed.
458                                  */
459                                 killed = 1;
460                                 break;
461                         }
462                 }
463                 if (killed)
464                         show_dir_entry(tag_killed, dir[i]);
465         }
466 }
467
468 static void show_ce_entry(const char *tag, struct cache_entry *ce)
469 {
470         int len = prefix_len;
471         int offset = prefix_offset;
472
473         if (len >= ce_namelen(ce))
474                 die("git-ls-files: internal error - cache entry not superset of prefix");
475
476         if (pathspec && !match(pathspec, ps_matched, ce->name, len))
477                 return;
478
479         if (tag && *tag && show_valid_bit &&
480             (ce->ce_flags & htons(CE_VALID))) {
481                 static char alttag[4];
482                 memcpy(alttag, tag, 3);
483                 if (isalpha(tag[0]))
484                         alttag[0] = tolower(tag[0]);
485                 else if (tag[0] == '?')
486                         alttag[0] = '!';
487                 else {
488                         alttag[0] = 'v';
489                         alttag[1] = tag[0];
490                         alttag[2] = ' ';
491                         alttag[3] = 0;
492                 }
493                 tag = alttag;
494         }
495
496         if (!show_stage) {
497                 fputs(tag, stdout);
498                 write_name_quoted("", 0, ce->name + offset,
499                                   line_terminator, stdout);
500                 putchar(line_terminator);
501         }
502         else {
503                 printf("%s%06o %s %d\t",
504                        tag,
505                        ntohl(ce->ce_mode),
506                        abbrev ? find_unique_abbrev(ce->sha1,abbrev)
507                                 : sha1_to_hex(ce->sha1),
508                        ce_stage(ce));
509                 write_name_quoted("", 0, ce->name + offset,
510                                   line_terminator, stdout);
511                 putchar(line_terminator);
512         }
513 }
514
515 static void show_files(void)
516 {
517         int i;
518
519         /* For cached/deleted files we don't need to even do the readdir */
520         if (show_others || show_killed) {
521                 const char *path = ".", *base = "";
522                 int baselen = prefix_len;
523
524                 if (baselen) {
525                         path = base = prefix;
526                         if (exclude_per_dir) {
527                                 char *p, *pp = xmalloc(baselen+1);
528                                 memcpy(pp, prefix, baselen+1);
529                                 p = pp;
530                                 while (1) {
531                                         char save = *p;
532                                         *p = 0;
533                                         push_exclude_per_directory(pp, p-pp);
534                                         *p++ = save;
535                                         if (!save)
536                                                 break;
537                                         p = strchr(p, '/');
538                                         if (p)
539                                                 p++;
540                                         else
541                                                 p = pp + baselen;
542                                 }
543                                 free(pp);
544                         }
545                 }
546                 read_directory(path, base, baselen);
547                 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
548                 if (show_others)
549                         show_other_files();
550                 if (show_killed)
551                         show_killed_files();
552         }
553         if (show_cached | show_stage) {
554                 for (i = 0; i < active_nr; i++) {
555                         struct cache_entry *ce = active_cache[i];
556                         if (excluded(ce->name) != show_ignored)
557                                 continue;
558                         if (show_unmerged && !ce_stage(ce))
559                                 continue;
560                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
561                 }
562         }
563         if (show_deleted | show_modified) {
564                 for (i = 0; i < active_nr; i++) {
565                         struct cache_entry *ce = active_cache[i];
566                         struct stat st;
567                         int err;
568                         if (excluded(ce->name) != show_ignored)
569                                 continue;
570                         err = lstat(ce->name, &st);
571                         if (show_deleted && err)
572                                 show_ce_entry(tag_removed, ce);
573                         if (show_modified && ce_modified(ce, &st, 0))
574                                 show_ce_entry(tag_modified, ce);
575                 }
576         }
577 }
578
579 /*
580  * Prune the index to only contain stuff starting with "prefix"
581  */
582 static void prune_cache(void)
583 {
584         int pos = cache_name_pos(prefix, prefix_len);
585         unsigned int first, last;
586
587         if (pos < 0)
588                 pos = -pos-1;
589         active_cache += pos;
590         active_nr -= pos;
591         first = 0;
592         last = active_nr;
593         while (last > first) {
594                 int next = (last + first) >> 1;
595                 struct cache_entry *ce = active_cache[next];
596                 if (!strncmp(ce->name, prefix, prefix_len)) {
597                         first = next+1;
598                         continue;
599                 }
600                 last = next;
601         }
602         active_nr = last;
603 }
604
605 static void verify_pathspec(void)
606 {
607         const char **p, *n, *prev;
608         char *real_prefix;
609         unsigned long max;
610
611         prev = NULL;
612         max = PATH_MAX;
613         for (p = pathspec; (n = *p) != NULL; p++) {
614                 int i, len = 0;
615                 for (i = 0; i < max; i++) {
616                         char c = n[i];
617                         if (prev && prev[i] != c)
618                                 break;
619                         if (!c || c == '*' || c == '?')
620                                 break;
621                         if (c == '/')
622                                 len = i+1;
623                 }
624                 prev = n;
625                 if (len < max) {
626                         max = len;
627                         if (!max)
628                                 break;
629                 }
630         }
631
632         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
633                 die("git-ls-files: cannot generate relative filenames containing '..'");
634
635         real_prefix = NULL;
636         prefix_len = max;
637         if (max) {
638                 real_prefix = xmalloc(max + 1);
639                 memcpy(real_prefix, prev, max);
640                 real_prefix[max] = 0;
641         }
642         prefix = real_prefix;
643 }
644
645 static const char ls_files_usage[] =
646         "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
647         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
648         "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
649         "[--] [<file>]*";
650
651 int main(int argc, const char **argv)
652 {
653         int i;
654         int exc_given = 0;
655
656         prefix = setup_git_directory();
657         if (prefix)
658                 prefix_offset = strlen(prefix);
659         git_config(git_default_config);
660
661         for (i = 1; i < argc; i++) {
662                 const char *arg = argv[i];
663
664                 if (!strcmp(arg, "--")) {
665                         i++;
666                         break;
667                 }
668                 if (!strcmp(arg, "-z")) {
669                         line_terminator = 0;
670                         continue;
671                 }
672                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
673                         tag_cached = "H ";
674                         tag_unmerged = "M ";
675                         tag_removed = "R ";
676                         tag_modified = "C ";
677                         tag_other = "? ";
678                         tag_killed = "K ";
679                         if (arg[1] == 'v')
680                                 show_valid_bit = 1;
681                         continue;
682                 }
683                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
684                         show_cached = 1;
685                         continue;
686                 }
687                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
688                         show_deleted = 1;
689                         continue;
690                 }
691                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
692                         show_modified = 1;
693                         continue;
694                 }
695                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
696                         show_others = 1;
697                         continue;
698                 }
699                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
700                         show_ignored = 1;
701                         continue;
702                 }
703                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
704                         show_stage = 1;
705                         continue;
706                 }
707                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
708                         show_killed = 1;
709                         continue;
710                 }
711                 if (!strcmp(arg, "--directory")) {
712                         show_other_directories = 1;
713                         continue;
714                 }
715                 if (!strcmp(arg, "--no-empty-directory")) {
716                         hide_empty_directories = 1;
717                         continue;
718                 }
719                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
720                         /* There's no point in showing unmerged unless
721                          * you also show the stage information.
722                          */
723                         show_stage = 1;
724                         show_unmerged = 1;
725                         continue;
726                 }
727                 if (!strcmp(arg, "-x") && i+1 < argc) {
728                         exc_given = 1;
729                         add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
730                         continue;
731                 }
732                 if (!strncmp(arg, "--exclude=", 10)) {
733                         exc_given = 1;
734                         add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
735                         continue;
736                 }
737                 if (!strcmp(arg, "-X") && i+1 < argc) {
738                         exc_given = 1;
739                         add_excludes_from_file(argv[++i]);
740                         continue;
741                 }
742                 if (!strncmp(arg, "--exclude-from=", 15)) {
743                         exc_given = 1;
744                         add_excludes_from_file(arg+15);
745                         continue;
746                 }
747                 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
748                         exc_given = 1;
749                         exclude_per_dir = arg + 24;
750                         continue;
751                 }
752                 if (!strcmp(arg, "--full-name")) {
753                         prefix_offset = 0;
754                         continue;
755                 }
756                 if (!strcmp(arg, "--error-unmatch")) {
757                         error_unmatch = 1;
758                         continue;
759                 }
760                 if (!strncmp(arg, "--abbrev=", 9)) {
761                         abbrev = strtoul(arg+9, NULL, 10);
762                         if (abbrev && abbrev < MINIMUM_ABBREV)
763                                 abbrev = MINIMUM_ABBREV;
764                         else if (abbrev > 40)
765                                 abbrev = 40;
766                         continue;
767                 }
768                 if (!strcmp(arg, "--abbrev")) {
769                         abbrev = DEFAULT_ABBREV;
770                         continue;
771                 }
772                 if (*arg == '-')
773                         usage(ls_files_usage);
774                 break;
775         }
776
777         pathspec = get_pathspec(prefix, argv + i);
778
779         /* Verify that the pathspec matches the prefix */
780         if (pathspec)
781                 verify_pathspec();
782
783         /* Treat unmatching pathspec elements as errors */
784         if (pathspec && error_unmatch) {
785                 int num;
786                 for (num = 0; pathspec[num]; num++)
787                         ;
788                 ps_matched = xcalloc(1, num);
789         }
790
791         if (show_ignored && !exc_given) {
792                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
793                         argv[0]);
794                 exit(1);
795         }
796
797         /* With no flags, we default to showing the cached files */
798         if (!(show_stage | show_deleted | show_others | show_unmerged |
799               show_killed | show_modified))
800                 show_cached = 1;
801
802         read_cache();
803         if (prefix)
804                 prune_cache();
805         show_files();
806
807         if (ps_matched) {
808                 /* We need to make sure all pathspec matched otherwise
809                  * it is an error.
810                  */
811                 int num, errors = 0;
812                 for (num = 0; pathspec[num]; num++) {
813                         if (ps_matched[num])
814                                 continue;
815                         error("pathspec '%s' did not match any.",
816                               pathspec[num] + prefix_offset);
817                         errors++;
818                 }
819                 return errors ? 1 : 0;
820         }
821
822         return 0;
823 }