Merge branch 'master' into next
[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 *prefix = NULL;
28 static const char **pathspec = NULL;
29 static int error_unmatch = 0;
30 static char *ps_matched = NULL;
31
32 static const char *tag_cached = "";
33 static const char *tag_unmerged = "";
34 static const char *tag_removed = "";
35 static const char *tag_other = "";
36 static const char *tag_killed = "";
37 static const char *tag_modified = "";
38
39
40 /*
41  * Match a pathspec against a filename. The first "len" characters
42  * are the common prefix
43  */
44 static int match(const char **spec, char *ps_matched,
45                  const char *filename, int len)
46 {
47         const char *m;
48
49         while ((m = *spec++) != NULL) {
50                 int matchlen = strlen(m + len);
51
52                 if (!matchlen)
53                         goto matched;
54                 if (!strncmp(m + len, filename + len, matchlen)) {
55                         if (m[len + matchlen - 1] == '/')
56                                 goto matched;
57                         switch (filename[len + matchlen]) {
58                         case '/': case '\0':
59                                 goto matched;
60                         }
61                 }
62                 if (!fnmatch(m + len, filename + len, 0))
63                         goto matched;
64                 if (ps_matched)
65                         ps_matched++;
66                 continue;
67         matched:
68                 if (ps_matched)
69                         *ps_matched = 1;
70                 return 1;
71         }
72         return 0;
73 }
74
75 static void show_dir_entry(const char *tag, struct dir_entry *ent)
76 {
77         int len = prefix_len;
78         int offset = prefix_offset;
79
80         if (len >= ent->len)
81                 die("git-ls-files: internal error - directory entry not superset of prefix");
82
83         if (pathspec && !match(pathspec, ps_matched, ent->name, len))
84                 return;
85
86         fputs(tag, stdout);
87         write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
88         putchar(line_terminator);
89 }
90
91 static void show_other_files(struct dir_struct *dir)
92 {
93         int i;
94         for (i = 0; i < dir->nr; i++) {
95                 /* We should not have a matching entry, but we
96                  * may have an unmerged entry for this path.
97                  */
98                 struct dir_entry *ent = dir->entries[i];
99                 int pos = cache_name_pos(ent->name, ent->len);
100                 struct cache_entry *ce;
101                 if (0 <= pos)
102                         die("bug in show-other-files");
103                 pos = -pos - 1;
104                 if (pos < active_nr) { 
105                         ce = active_cache[pos];
106                         if (ce_namelen(ce) == ent->len &&
107                             !memcmp(ce->name, ent->name, ent->len))
108                                 continue; /* Yup, this one exists unmerged */
109                 }
110                 show_dir_entry(tag_other, ent);
111         }
112 }
113
114 static void show_killed_files(struct dir_struct *dir)
115 {
116         int i;
117         for (i = 0; i < dir->nr; i++) {
118                 struct dir_entry *ent = dir->entries[i];
119                 char *cp, *sp;
120                 int pos, len, killed = 0;
121
122                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
123                         sp = strchr(cp, '/');
124                         if (!sp) {
125                                 /* If ent->name is prefix of an entry in the
126                                  * cache, it will be killed.
127                                  */
128                                 pos = cache_name_pos(ent->name, ent->len);
129                                 if (0 <= pos)
130                                         die("bug in show-killed-files");
131                                 pos = -pos - 1;
132                                 while (pos < active_nr &&
133                                        ce_stage(active_cache[pos]))
134                                         pos++; /* skip unmerged */
135                                 if (active_nr <= pos)
136                                         break;
137                                 /* pos points at a name immediately after
138                                  * ent->name in the cache.  Does it expect
139                                  * ent->name to be a directory?
140                                  */
141                                 len = ce_namelen(active_cache[pos]);
142                                 if ((ent->len < len) &&
143                                     !strncmp(active_cache[pos]->name,
144                                              ent->name, ent->len) &&
145                                     active_cache[pos]->name[ent->len] == '/')
146                                         killed = 1;
147                                 break;
148                         }
149                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
150                                 /* If any of the leading directories in
151                                  * ent->name is registered in the cache,
152                                  * ent->name will be killed.
153                                  */
154                                 killed = 1;
155                                 break;
156                         }
157                 }
158                 if (killed)
159                         show_dir_entry(tag_killed, dir->entries[i]);
160         }
161 }
162
163 static void show_ce_entry(const char *tag, struct cache_entry *ce)
164 {
165         int len = prefix_len;
166         int offset = prefix_offset;
167
168         if (len >= ce_namelen(ce))
169                 die("git-ls-files: internal error - cache entry not superset of prefix");
170
171         if (pathspec && !match(pathspec, ps_matched, ce->name, len))
172                 return;
173
174         if (tag && *tag && show_valid_bit &&
175             (ce->ce_flags & htons(CE_VALID))) {
176                 static char alttag[4];
177                 memcpy(alttag, tag, 3);
178                 if (isalpha(tag[0]))
179                         alttag[0] = tolower(tag[0]);
180                 else if (tag[0] == '?')
181                         alttag[0] = '!';
182                 else {
183                         alttag[0] = 'v';
184                         alttag[1] = tag[0];
185                         alttag[2] = ' ';
186                         alttag[3] = 0;
187                 }
188                 tag = alttag;
189         }
190
191         if (!show_stage) {
192                 fputs(tag, stdout);
193                 write_name_quoted("", 0, ce->name + offset,
194                                   line_terminator, stdout);
195                 putchar(line_terminator);
196         }
197         else {
198                 printf("%s%06o %s %d\t",
199                        tag,
200                        ntohl(ce->ce_mode),
201                        abbrev ? find_unique_abbrev(ce->sha1,abbrev)
202                                 : sha1_to_hex(ce->sha1),
203                        ce_stage(ce));
204                 write_name_quoted("", 0, ce->name + offset,
205                                   line_terminator, stdout);
206                 putchar(line_terminator);
207         }
208 }
209
210 static void show_files(struct dir_struct *dir)
211 {
212         int i;
213
214         /* For cached/deleted files we don't need to even do the readdir */
215         if (show_others || show_killed) {
216                 const char *path = ".", *base = "";
217                 int baselen = prefix_len;
218
219                 if (baselen)
220                         path = base = prefix;
221                 read_directory(dir, path, base, baselen);
222                 if (show_others)
223                         show_other_files(dir);
224                 if (show_killed)
225                         show_killed_files(dir);
226         }
227         if (show_cached | show_stage) {
228                 for (i = 0; i < active_nr; i++) {
229                         struct cache_entry *ce = active_cache[i];
230                         if (excluded(dir, ce->name) != dir->show_ignored)
231                                 continue;
232                         if (show_unmerged && !ce_stage(ce))
233                                 continue;
234                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
235                 }
236         }
237         if (show_deleted | show_modified) {
238                 for (i = 0; i < active_nr; i++) {
239                         struct cache_entry *ce = active_cache[i];
240                         struct stat st;
241                         int err;
242                         if (excluded(dir, ce->name) != dir->show_ignored)
243                                 continue;
244                         err = lstat(ce->name, &st);
245                         if (show_deleted && err)
246                                 show_ce_entry(tag_removed, ce);
247                         if (show_modified && ce_modified(ce, &st, 0))
248                                 show_ce_entry(tag_modified, ce);
249                 }
250         }
251 }
252
253 /*
254  * Prune the index to only contain stuff starting with "prefix"
255  */
256 static void prune_cache(void)
257 {
258         int pos = cache_name_pos(prefix, prefix_len);
259         unsigned int first, last;
260
261         if (pos < 0)
262                 pos = -pos-1;
263         active_cache += pos;
264         active_nr -= pos;
265         first = 0;
266         last = active_nr;
267         while (last > first) {
268                 int next = (last + first) >> 1;
269                 struct cache_entry *ce = active_cache[next];
270                 if (!strncmp(ce->name, prefix, prefix_len)) {
271                         first = next+1;
272                         continue;
273                 }
274                 last = next;
275         }
276         active_nr = last;
277 }
278
279 static void verify_pathspec(void)
280 {
281         const char **p, *n, *prev;
282         char *real_prefix;
283         unsigned long max;
284
285         prev = NULL;
286         max = PATH_MAX;
287         for (p = pathspec; (n = *p) != NULL; p++) {
288                 int i, len = 0;
289                 for (i = 0; i < max; i++) {
290                         char c = n[i];
291                         if (prev && prev[i] != c)
292                                 break;
293                         if (!c || c == '*' || c == '?')
294                                 break;
295                         if (c == '/')
296                                 len = i+1;
297                 }
298                 prev = n;
299                 if (len < max) {
300                         max = len;
301                         if (!max)
302                                 break;
303                 }
304         }
305
306         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
307                 die("git-ls-files: cannot generate relative filenames containing '..'");
308
309         real_prefix = NULL;
310         prefix_len = max;
311         if (max) {
312                 real_prefix = xmalloc(max + 1);
313                 memcpy(real_prefix, prev, max);
314                 real_prefix[max] = 0;
315         }
316         prefix = real_prefix;
317 }
318
319 static const char ls_files_usage[] =
320         "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
321         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
322         "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
323         "[--] [<file>]*";
324
325 int cmd_ls_files(int argc, const char **argv, char** envp)
326 {
327         int i;
328         int exc_given = 0;
329         struct dir_struct dir;
330
331         memset(&dir, 0, sizeof(dir));
332         prefix = setup_git_directory();
333         if (prefix)
334                 prefix_offset = strlen(prefix);
335         git_config(git_default_config);
336
337         for (i = 1; i < argc; i++) {
338                 const char *arg = argv[i];
339
340                 if (!strcmp(arg, "--")) {
341                         i++;
342                         break;
343                 }
344                 if (!strcmp(arg, "-z")) {
345                         line_terminator = 0;
346                         continue;
347                 }
348                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
349                         tag_cached = "H ";
350                         tag_unmerged = "M ";
351                         tag_removed = "R ";
352                         tag_modified = "C ";
353                         tag_other = "? ";
354                         tag_killed = "K ";
355                         if (arg[1] == 'v')
356                                 show_valid_bit = 1;
357                         continue;
358                 }
359                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
360                         show_cached = 1;
361                         continue;
362                 }
363                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
364                         show_deleted = 1;
365                         continue;
366                 }
367                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
368                         show_modified = 1;
369                         continue;
370                 }
371                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
372                         show_others = 1;
373                         continue;
374                 }
375                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
376                         dir.show_ignored = 1;
377                         continue;
378                 }
379                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
380                         show_stage = 1;
381                         continue;
382                 }
383                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
384                         show_killed = 1;
385                         continue;
386                 }
387                 if (!strcmp(arg, "--directory")) {
388                         dir.show_other_directories = 1;
389                         continue;
390                 }
391                 if (!strcmp(arg, "--no-empty-directory")) {
392                         dir.hide_empty_directories = 1;
393                         continue;
394                 }
395                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
396                         /* There's no point in showing unmerged unless
397                          * you also show the stage information.
398                          */
399                         show_stage = 1;
400                         show_unmerged = 1;
401                         continue;
402                 }
403                 if (!strcmp(arg, "-x") && i+1 < argc) {
404                         exc_given = 1;
405                         add_exclude(argv[++i], "", 0, &dir.exclude_list[EXC_CMDL]);
406                         continue;
407                 }
408                 if (!strncmp(arg, "--exclude=", 10)) {
409                         exc_given = 1;
410                         add_exclude(arg+10, "", 0, &dir.exclude_list[EXC_CMDL]);
411                         continue;
412                 }
413                 if (!strcmp(arg, "-X") && i+1 < argc) {
414                         exc_given = 1;
415                         add_excludes_from_file(&dir, argv[++i]);
416                         continue;
417                 }
418                 if (!strncmp(arg, "--exclude-from=", 15)) {
419                         exc_given = 1;
420                         add_excludes_from_file(&dir, arg+15);
421                         continue;
422                 }
423                 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
424                         exc_given = 1;
425                         dir.exclude_per_dir = arg + 24;
426                         continue;
427                 }
428                 if (!strcmp(arg, "--full-name")) {
429                         prefix_offset = 0;
430                         continue;
431                 }
432                 if (!strcmp(arg, "--error-unmatch")) {
433                         error_unmatch = 1;
434                         continue;
435                 }
436                 if (!strncmp(arg, "--abbrev=", 9)) {
437                         abbrev = strtoul(arg+9, NULL, 10);
438                         if (abbrev && abbrev < MINIMUM_ABBREV)
439                                 abbrev = MINIMUM_ABBREV;
440                         else if (abbrev > 40)
441                                 abbrev = 40;
442                         continue;
443                 }
444                 if (!strcmp(arg, "--abbrev")) {
445                         abbrev = DEFAULT_ABBREV;
446                         continue;
447                 }
448                 if (*arg == '-')
449                         usage(ls_files_usage);
450                 break;
451         }
452
453         pathspec = get_pathspec(prefix, argv + i);
454
455         /* Verify that the pathspec matches the prefix */
456         if (pathspec)
457                 verify_pathspec();
458
459         /* Treat unmatching pathspec elements as errors */
460         if (pathspec && error_unmatch) {
461                 int num;
462                 for (num = 0; pathspec[num]; num++)
463                         ;
464                 ps_matched = xcalloc(1, num);
465         }
466
467         if (dir.show_ignored && !exc_given) {
468                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
469                         argv[0]);
470                 exit(1);
471         }
472
473         /* With no flags, we default to showing the cached files */
474         if (!(show_stage | show_deleted | show_others | show_unmerged |
475               show_killed | show_modified))
476                 show_cached = 1;
477
478         read_cache();
479         if (prefix)
480                 prune_cache();
481         show_files(&dir);
482
483         if (ps_matched) {
484                 /* We need to make sure all pathspec matched otherwise
485                  * it is an error.
486                  */
487                 int num, errors = 0;
488                 for (num = 0; pathspec[num]; num++) {
489                         if (ps_matched[num])
490                                 continue;
491                         error("pathspec '%s' did not match any.",
492                               pathspec[num] + prefix_offset);
493                         errors++;
494                 }
495                 return errors ? 1 : 0;
496         }
497
498         return 0;
499 }