GIT 1.4.2
[git] / builtin-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 <fnmatch.h>
9
10 #include "cache.h"
11 #include "quote.h"
12 #include "dir.h"
13 #include "builtin.h"
14
15 static int abbrev = 0;
16 static int show_deleted = 0;
17 static int show_cached = 0;
18 static int show_others = 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_valid_bit = 0;
24 static int line_terminator = '\n';
25
26 static int prefix_len = 0, prefix_offset = 0;
27 static const char **pathspec = NULL;
28 static int error_unmatch = 0;
29 static char *ps_matched = NULL;
30
31 static const char *tag_cached = "";
32 static const char *tag_unmerged = "";
33 static const char *tag_removed = "";
34 static const char *tag_other = "";
35 static const char *tag_killed = "";
36 static const char *tag_modified = "";
37
38
39 /*
40  * Match a pathspec against a filename. The first "len" characters
41  * are the common prefix
42  */
43 static int match(const char **spec, char *ps_matched,
44                  const char *filename, int len)
45 {
46         const char *m;
47
48         while ((m = *spec++) != NULL) {
49                 int matchlen = strlen(m + len);
50
51                 if (!matchlen)
52                         goto matched;
53                 if (!strncmp(m + len, filename + len, matchlen)) {
54                         if (m[len + matchlen - 1] == '/')
55                                 goto matched;
56                         switch (filename[len + matchlen]) {
57                         case '/': case '\0':
58                                 goto matched;
59                         }
60                 }
61                 if (!fnmatch(m + len, filename + len, 0))
62                         goto matched;
63                 if (ps_matched)
64                         ps_matched++;
65                 continue;
66         matched:
67                 if (ps_matched)
68                         *ps_matched = 1;
69                 return 1;
70         }
71         return 0;
72 }
73
74 static void show_dir_entry(const char *tag, struct dir_entry *ent)
75 {
76         int len = prefix_len;
77         int offset = prefix_offset;
78
79         if (len >= ent->len)
80                 die("git-ls-files: internal error - directory entry not superset of prefix");
81
82         if (pathspec && !match(pathspec, ps_matched, ent->name, len))
83                 return;
84
85         fputs(tag, stdout);
86         write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
87         putchar(line_terminator);
88 }
89
90 static void show_other_files(struct dir_struct *dir)
91 {
92         int i;
93         for (i = 0; i < dir->nr; i++) {
94                 /* We should not have a matching entry, but we
95                  * may have an unmerged entry for this path.
96                  */
97                 struct dir_entry *ent = dir->entries[i];
98                 int pos = cache_name_pos(ent->name, ent->len);
99                 struct cache_entry *ce;
100                 if (0 <= pos)
101                         die("bug in show-other-files");
102                 pos = -pos - 1;
103                 if (pos < active_nr) { 
104                         ce = active_cache[pos];
105                         if (ce_namelen(ce) == ent->len &&
106                             !memcmp(ce->name, ent->name, ent->len))
107                                 continue; /* Yup, this one exists unmerged */
108                 }
109                 show_dir_entry(tag_other, ent);
110         }
111 }
112
113 static void show_killed_files(struct dir_struct *dir)
114 {
115         int i;
116         for (i = 0; i < dir->nr; i++) {
117                 struct dir_entry *ent = dir->entries[i];
118                 char *cp, *sp;
119                 int pos, len, killed = 0;
120
121                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
122                         sp = strchr(cp, '/');
123                         if (!sp) {
124                                 /* If ent->name is prefix of an entry in the
125                                  * cache, it will be killed.
126                                  */
127                                 pos = cache_name_pos(ent->name, ent->len);
128                                 if (0 <= pos)
129                                         die("bug in show-killed-files");
130                                 pos = -pos - 1;
131                                 while (pos < active_nr &&
132                                        ce_stage(active_cache[pos]))
133                                         pos++; /* skip unmerged */
134                                 if (active_nr <= pos)
135                                         break;
136                                 /* pos points at a name immediately after
137                                  * ent->name in the cache.  Does it expect
138                                  * ent->name to be a directory?
139                                  */
140                                 len = ce_namelen(active_cache[pos]);
141                                 if ((ent->len < len) &&
142                                     !strncmp(active_cache[pos]->name,
143                                              ent->name, ent->len) &&
144                                     active_cache[pos]->name[ent->len] == '/')
145                                         killed = 1;
146                                 break;
147                         }
148                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
149                                 /* If any of the leading directories in
150                                  * ent->name is registered in the cache,
151                                  * ent->name will be killed.
152                                  */
153                                 killed = 1;
154                                 break;
155                         }
156                 }
157                 if (killed)
158                         show_dir_entry(tag_killed, dir->entries[i]);
159         }
160 }
161
162 static void show_ce_entry(const char *tag, struct cache_entry *ce)
163 {
164         int len = prefix_len;
165         int offset = prefix_offset;
166
167         if (len >= ce_namelen(ce))
168                 die("git-ls-files: internal error - cache entry not superset of prefix");
169
170         if (pathspec && !match(pathspec, ps_matched, ce->name, len))
171                 return;
172
173         if (tag && *tag && show_valid_bit &&
174             (ce->ce_flags & htons(CE_VALID))) {
175                 static char alttag[4];
176                 memcpy(alttag, tag, 3);
177                 if (isalpha(tag[0]))
178                         alttag[0] = tolower(tag[0]);
179                 else if (tag[0] == '?')
180                         alttag[0] = '!';
181                 else {
182                         alttag[0] = 'v';
183                         alttag[1] = tag[0];
184                         alttag[2] = ' ';
185                         alttag[3] = 0;
186                 }
187                 tag = alttag;
188         }
189
190         if (!show_stage) {
191                 fputs(tag, stdout);
192                 write_name_quoted("", 0, ce->name + offset,
193                                   line_terminator, stdout);
194                 putchar(line_terminator);
195         }
196         else {
197                 printf("%s%06o %s %d\t",
198                        tag,
199                        ntohl(ce->ce_mode),
200                        abbrev ? find_unique_abbrev(ce->sha1,abbrev)
201                                 : sha1_to_hex(ce->sha1),
202                        ce_stage(ce));
203                 write_name_quoted("", 0, ce->name + offset,
204                                   line_terminator, stdout);
205                 putchar(line_terminator);
206         }
207 }
208
209 static void show_files(struct dir_struct *dir, const char *prefix)
210 {
211         int i;
212
213         /* For cached/deleted files we don't need to even do the readdir */
214         if (show_others || show_killed) {
215                 const char *path = ".", *base = "";
216                 int baselen = prefix_len;
217
218                 if (baselen)
219                         path = base = prefix;
220                 read_directory(dir, path, base, baselen);
221                 if (show_others)
222                         show_other_files(dir);
223                 if (show_killed)
224                         show_killed_files(dir);
225         }
226         if (show_cached | show_stage) {
227                 for (i = 0; i < active_nr; i++) {
228                         struct cache_entry *ce = active_cache[i];
229                         if (excluded(dir, ce->name) != dir->show_ignored)
230                                 continue;
231                         if (show_unmerged && !ce_stage(ce))
232                                 continue;
233                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
234                 }
235         }
236         if (show_deleted | show_modified) {
237                 for (i = 0; i < active_nr; i++) {
238                         struct cache_entry *ce = active_cache[i];
239                         struct stat st;
240                         int err;
241                         if (excluded(dir, ce->name) != dir->show_ignored)
242                                 continue;
243                         err = lstat(ce->name, &st);
244                         if (show_deleted && err)
245                                 show_ce_entry(tag_removed, ce);
246                         if (show_modified && ce_modified(ce, &st, 0))
247                                 show_ce_entry(tag_modified, ce);
248                 }
249         }
250 }
251
252 /*
253  * Prune the index to only contain stuff starting with "prefix"
254  */
255 static void prune_cache(const char *prefix)
256 {
257         int pos = cache_name_pos(prefix, prefix_len);
258         unsigned int first, last;
259
260         if (pos < 0)
261                 pos = -pos-1;
262         active_cache += pos;
263         active_nr -= pos;
264         first = 0;
265         last = active_nr;
266         while (last > first) {
267                 int next = (last + first) >> 1;
268                 struct cache_entry *ce = active_cache[next];
269                 if (!strncmp(ce->name, prefix, prefix_len)) {
270                         first = next+1;
271                         continue;
272                 }
273                 last = next;
274         }
275         active_nr = last;
276 }
277
278 static const char *verify_pathspec(const char *prefix)
279 {
280         const char **p, *n, *prev;
281         char *real_prefix;
282         unsigned long max;
283
284         prev = NULL;
285         max = PATH_MAX;
286         for (p = pathspec; (n = *p) != NULL; p++) {
287                 int i, len = 0;
288                 for (i = 0; i < max; i++) {
289                         char c = n[i];
290                         if (prev && prev[i] != c)
291                                 break;
292                         if (!c || c == '*' || c == '?')
293                                 break;
294                         if (c == '/')
295                                 len = i+1;
296                 }
297                 prev = n;
298                 if (len < max) {
299                         max = len;
300                         if (!max)
301                                 break;
302                 }
303         }
304
305         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
306                 die("git-ls-files: cannot generate relative filenames containing '..'");
307
308         real_prefix = NULL;
309         prefix_len = max;
310         if (max) {
311                 real_prefix = xmalloc(max + 1);
312                 memcpy(real_prefix, prev, max);
313                 real_prefix[max] = 0;
314         }
315         return real_prefix;
316 }
317
318 static const char ls_files_usage[] =
319         "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
320         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
321         "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
322         "[--] [<file>]*";
323
324 int cmd_ls_files(int argc, const char **argv, const char *prefix)
325 {
326         int i;
327         int exc_given = 0;
328         struct dir_struct dir;
329
330         memset(&dir, 0, sizeof(dir));
331         if (prefix)
332                 prefix_offset = strlen(prefix);
333         git_config(git_default_config);
334
335         for (i = 1; i < argc; i++) {
336                 const char *arg = argv[i];
337
338                 if (!strcmp(arg, "--")) {
339                         i++;
340                         break;
341                 }
342                 if (!strcmp(arg, "-z")) {
343                         line_terminator = 0;
344                         continue;
345                 }
346                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
347                         tag_cached = "H ";
348                         tag_unmerged = "M ";
349                         tag_removed = "R ";
350                         tag_modified = "C ";
351                         tag_other = "? ";
352                         tag_killed = "K ";
353                         if (arg[1] == 'v')
354                                 show_valid_bit = 1;
355                         continue;
356                 }
357                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
358                         show_cached = 1;
359                         continue;
360                 }
361                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
362                         show_deleted = 1;
363                         continue;
364                 }
365                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
366                         show_modified = 1;
367                         continue;
368                 }
369                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
370                         show_others = 1;
371                         continue;
372                 }
373                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
374                         dir.show_ignored = 1;
375                         continue;
376                 }
377                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
378                         show_stage = 1;
379                         continue;
380                 }
381                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
382                         show_killed = 1;
383                         continue;
384                 }
385                 if (!strcmp(arg, "--directory")) {
386                         dir.show_other_directories = 1;
387                         continue;
388                 }
389                 if (!strcmp(arg, "--no-empty-directory")) {
390                         dir.hide_empty_directories = 1;
391                         continue;
392                 }
393                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
394                         /* There's no point in showing unmerged unless
395                          * you also show the stage information.
396                          */
397                         show_stage = 1;
398                         show_unmerged = 1;
399                         continue;
400                 }
401                 if (!strcmp(arg, "-x") && i+1 < argc) {
402                         exc_given = 1;
403                         add_exclude(argv[++i], "", 0, &dir.exclude_list[EXC_CMDL]);
404                         continue;
405                 }
406                 if (!strncmp(arg, "--exclude=", 10)) {
407                         exc_given = 1;
408                         add_exclude(arg+10, "", 0, &dir.exclude_list[EXC_CMDL]);
409                         continue;
410                 }
411                 if (!strcmp(arg, "-X") && i+1 < argc) {
412                         exc_given = 1;
413                         add_excludes_from_file(&dir, argv[++i]);
414                         continue;
415                 }
416                 if (!strncmp(arg, "--exclude-from=", 15)) {
417                         exc_given = 1;
418                         add_excludes_from_file(&dir, arg+15);
419                         continue;
420                 }
421                 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
422                         exc_given = 1;
423                         dir.exclude_per_dir = arg + 24;
424                         continue;
425                 }
426                 if (!strcmp(arg, "--full-name")) {
427                         prefix_offset = 0;
428                         continue;
429                 }
430                 if (!strcmp(arg, "--error-unmatch")) {
431                         error_unmatch = 1;
432                         continue;
433                 }
434                 if (!strncmp(arg, "--abbrev=", 9)) {
435                         abbrev = strtoul(arg+9, NULL, 10);
436                         if (abbrev && abbrev < MINIMUM_ABBREV)
437                                 abbrev = MINIMUM_ABBREV;
438                         else if (abbrev > 40)
439                                 abbrev = 40;
440                         continue;
441                 }
442                 if (!strcmp(arg, "--abbrev")) {
443                         abbrev = DEFAULT_ABBREV;
444                         continue;
445                 }
446                 if (*arg == '-')
447                         usage(ls_files_usage);
448                 break;
449         }
450
451         pathspec = get_pathspec(prefix, argv + i);
452
453         /* Verify that the pathspec matches the prefix */
454         if (pathspec)
455                 prefix = verify_pathspec(prefix);
456
457         /* Treat unmatching pathspec elements as errors */
458         if (pathspec && error_unmatch) {
459                 int num;
460                 for (num = 0; pathspec[num]; num++)
461                         ;
462                 ps_matched = xcalloc(1, num);
463         }
464
465         if (dir.show_ignored && !exc_given) {
466                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
467                         argv[0]);
468                 exit(1);
469         }
470
471         /* With no flags, we default to showing the cached files */
472         if (!(show_stage | show_deleted | show_others | show_unmerged |
473               show_killed | show_modified))
474                 show_cached = 1;
475
476         read_cache();
477         if (prefix)
478                 prune_cache(prefix);
479         show_files(&dir, prefix);
480
481         if (ps_matched) {
482                 /* We need to make sure all pathspec matched otherwise
483                  * it is an error.
484                  */
485                 int num, errors = 0;
486                 for (num = 0; pathspec[num]; num++) {
487                         if (ps_matched[num])
488                                 continue;
489                         error("pathspec '%s' did not match any.",
490                               pathspec[num] + prefix_offset);
491                         errors++;
492                 }
493                 return errors ? 1 : 0;
494         }
495
496         return 0;
497 }