Diff clean-up.
[git/git.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
13 static int show_deleted = 0;
14 static int show_cached = 0;
15 static int show_others = 0;
16 static int show_ignored = 0;
17 static int show_stage = 0;
18 static int show_unmerged = 0;
19 static int show_modified = 0;
20 static int show_killed = 0;
21 static int line_terminator = '\n';
22
23 static int prefix_len = 0, prefix_offset = 0;
24 static const char *prefix = NULL;
25 static const char **pathspec = NULL;
26
27 static const char *tag_cached = "";
28 static const char *tag_unmerged = "";
29 static const char *tag_removed = "";
30 static const char *tag_other = "";
31 static const char *tag_killed = "";
32 static const char *tag_modified = "";
33
34 static const char *exclude_per_dir = NULL;
35
36 /* We maintain three exclude pattern lists:
37 * EXC_CMDL lists patterns explicitly given on the command line.
38 * EXC_DIRS lists patterns obtained from per-directory ignore files.
39 * EXC_FILE lists patterns from fallback ignore files.
40 */
41 #define EXC_CMDL 0
42 #define EXC_DIRS 1
43 #define EXC_FILE 2
44 static struct exclude_list {
45 int nr;
46 int alloc;
47 struct exclude {
48 const char *pattern;
49 const char *base;
50 int baselen;
51 } **excludes;
52 } exclude_list[3];
53
54 static void add_exclude(const char *string, const char *base,
55 int baselen, struct exclude_list *which)
56 {
57 struct exclude *x = xmalloc(sizeof (*x));
58
59 x->pattern = string;
60 x->base = base;
61 x->baselen = baselen;
62 if (which->nr == which->alloc) {
63 which->alloc = alloc_nr(which->alloc);
64 which->excludes = realloc(which->excludes,
65 which->alloc * sizeof(x));
66 }
67 which->excludes[which->nr++] = x;
68 }
69
70 static int add_excludes_from_file_1(const char *fname,
71 const char *base,
72 int baselen,
73 struct exclude_list *which)
74 {
75 int fd, i;
76 long size;
77 char *buf, *entry;
78
79 fd = open(fname, O_RDONLY);
80 if (fd < 0)
81 goto err;
82 size = lseek(fd, 0, SEEK_END);
83 if (size < 0)
84 goto err;
85 lseek(fd, 0, SEEK_SET);
86 if (size == 0) {
87 close(fd);
88 return 0;
89 }
90 buf = xmalloc(size);
91 if (read(fd, buf, size) != size)
92 goto err;
93 close(fd);
94
95 entry = buf;
96 for (i = 0; i < size; i++) {
97 if (buf[i] == '\n') {
98 if (entry != buf + i && entry[0] != '#') {
99 buf[i] = 0;
100 add_exclude(entry, base, baselen, which);
101 }
102 entry = buf + i + 1;
103 }
104 }
105 return 0;
106
107 err:
108 if (0 <= fd)
109 close(fd);
110 return -1;
111 }
112
113 static void add_excludes_from_file(const char *fname)
114 {
115 if (add_excludes_from_file_1(fname, "", 0,
116 &exclude_list[EXC_FILE]) < 0)
117 die("cannot use %s as an exclude file", fname);
118 }
119
120 static int push_exclude_per_directory(const char *base, int baselen)
121 {
122 char exclude_file[PATH_MAX];
123 struct exclude_list *el = &exclude_list[EXC_DIRS];
124 int current_nr = el->nr;
125
126 if (exclude_per_dir) {
127 memcpy(exclude_file, base, baselen);
128 strcpy(exclude_file + baselen, exclude_per_dir);
129 add_excludes_from_file_1(exclude_file, base, baselen, el);
130 }
131 return current_nr;
132 }
133
134 static void pop_exclude_per_directory(int stk)
135 {
136 struct exclude_list *el = &exclude_list[EXC_DIRS];
137
138 while (stk < el->nr)
139 free(el->excludes[--el->nr]);
140 }
141
142 /* Scan the list and let the last match determines the fate.
143 * Return 1 for exclude, 0 for include and -1 for undecided.
144 */
145 static int excluded_1(const char *pathname,
146 int pathlen,
147 struct exclude_list *el)
148 {
149 int i;
150
151 if (el->nr) {
152 for (i = el->nr - 1; 0 <= i; i--) {
153 struct exclude *x = el->excludes[i];
154 const char *exclude = x->pattern;
155 int to_exclude = 1;
156
157 if (*exclude == '!') {
158 to_exclude = 0;
159 exclude++;
160 }
161
162 if (!strchr(exclude, '/')) {
163 /* match basename */
164 const char *basename = strrchr(pathname, '/');
165 basename = (basename) ? basename+1 : pathname;
166 if (fnmatch(exclude, basename, 0) == 0)
167 return to_exclude;
168 }
169 else {
170 /* match with FNM_PATHNAME:
171 * exclude has base (baselen long) inplicitly
172 * in front of it.
173 */
174 int baselen = x->baselen;
175 if (*exclude == '/')
176 exclude++;
177
178 if (pathlen < baselen ||
179 (baselen && pathname[baselen-1] != '/') ||
180 strncmp(pathname, x->base, baselen))
181 continue;
182
183 if (fnmatch(exclude, pathname+baselen,
184 FNM_PATHNAME) == 0)
185 return to_exclude;
186 }
187 }
188 }
189 return -1; /* undecided */
190 }
191
192 static int excluded(const char *pathname)
193 {
194 int pathlen = strlen(pathname);
195 int st;
196
197 for (st = EXC_CMDL; st <= EXC_FILE; st++) {
198 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
199 case 0:
200 return 0;
201 case 1:
202 return 1;
203 }
204 }
205 return 0;
206 }
207
208 struct nond_on_fs {
209 int len;
210 char name[0];
211 };
212
213 static struct nond_on_fs **dir;
214 static int nr_dir;
215 static int dir_alloc;
216
217 static void add_name(const char *pathname, int len)
218 {
219 struct nond_on_fs *ent;
220
221 if (cache_name_pos(pathname, len) >= 0)
222 return;
223
224 if (nr_dir == dir_alloc) {
225 dir_alloc = alloc_nr(dir_alloc);
226 dir = xrealloc(dir, dir_alloc*sizeof(ent));
227 }
228 ent = xmalloc(sizeof(*ent) + len + 1);
229 ent->len = len;
230 memcpy(ent->name, pathname, len);
231 ent->name[len] = 0;
232 dir[nr_dir++] = ent;
233 }
234
235 /*
236 * Read a directory tree. We currently ignore anything but
237 * directories, regular files and symlinks. That's because git
238 * doesn't handle them at all yet. Maybe that will change some
239 * day.
240 *
241 * Also, we ignore the name ".git" (even if it is not a directory).
242 * That likely will not change.
243 */
244 static void read_directory(const char *path, const char *base, int baselen)
245 {
246 DIR *dir = opendir(path);
247
248 if (dir) {
249 int exclude_stk;
250 struct dirent *de;
251 char fullname[MAXPATHLEN + 1];
252 memcpy(fullname, base, baselen);
253
254 exclude_stk = push_exclude_per_directory(base, baselen);
255
256 while ((de = readdir(dir)) != NULL) {
257 int len;
258
259 if ((de->d_name[0] == '.') &&
260 (de->d_name[1] == 0 ||
261 !strcmp(de->d_name + 1, ".") ||
262 !strcmp(de->d_name + 1, "git")))
263 continue;
264 len = strlen(de->d_name);
265 memcpy(fullname + baselen, de->d_name, len+1);
266 if (excluded(fullname) != show_ignored)
267 continue;
268
269 switch (DTYPE(de)) {
270 struct stat st;
271 default:
272 continue;
273 case DT_UNKNOWN:
274 if (lstat(fullname, &st))
275 continue;
276 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
277 break;
278 if (!S_ISDIR(st.st_mode))
279 continue;
280 /* fallthrough */
281 case DT_DIR:
282 memcpy(fullname + baselen + len, "/", 2);
283 read_directory(fullname, fullname,
284 baselen + len + 1);
285 continue;
286 case DT_REG:
287 case DT_LNK:
288 break;
289 }
290 add_name(fullname, baselen + len);
291 }
292 closedir(dir);
293
294 pop_exclude_per_directory(exclude_stk);
295 }
296 }
297
298 static int cmp_name(const void *p1, const void *p2)
299 {
300 const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
301 const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
302
303 return cache_name_compare(e1->name, e1->len,
304 e2->name, e2->len);
305 }
306
307 /*
308 * Match a pathspec against a filename. The first "len" characters
309 * are the common prefix
310 */
311 static int match(const char **spec, const char *filename, int len)
312 {
313 const char *m;
314
315 while ((m = *spec++) != NULL) {
316 int matchlen = strlen(m + len);
317
318 if (!matchlen)
319 return 1;
320 if (!strncmp(m + len, filename + len, matchlen)) {
321 if (m[len + matchlen - 1] == '/')
322 return 1;
323 switch (filename[len + matchlen]) {
324 case '/': case '\0':
325 return 1;
326 }
327 }
328 if (!fnmatch(m + len, filename + len, 0))
329 return 1;
330 }
331 return 0;
332 }
333
334 static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
335 {
336 int len = prefix_len;
337 int offset = prefix_offset;
338
339 if (len >= ent->len)
340 die("git-ls-files: internal error - directory entry not superset of prefix");
341
342 if (pathspec && !match(pathspec, ent->name, len))
343 return;
344
345 printf("%s%s%c", tag, ent->name + offset, line_terminator);
346 }
347
348 static void show_killed_files(void)
349 {
350 int i;
351 for (i = 0; i < nr_dir; i++) {
352 struct nond_on_fs *ent = dir[i];
353 char *cp, *sp;
354 int pos, len, killed = 0;
355
356 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
357 sp = strchr(cp, '/');
358 if (!sp) {
359 /* If ent->name is prefix of an entry in the
360 * cache, it will be killed.
361 */
362 pos = cache_name_pos(ent->name, ent->len);
363 if (0 <= pos)
364 die("bug in show-killed-files");
365 pos = -pos - 1;
366 while (pos < active_nr &&
367 ce_stage(active_cache[pos]))
368 pos++; /* skip unmerged */
369 if (active_nr <= pos)
370 break;
371 /* pos points at a name immediately after
372 * ent->name in the cache. Does it expect
373 * ent->name to be a directory?
374 */
375 len = ce_namelen(active_cache[pos]);
376 if ((ent->len < len) &&
377 !strncmp(active_cache[pos]->name,
378 ent->name, ent->len) &&
379 active_cache[pos]->name[ent->len] == '/')
380 killed = 1;
381 break;
382 }
383 if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
384 /* If any of the leading directories in
385 * ent->name is registered in the cache,
386 * ent->name will be killed.
387 */
388 killed = 1;
389 break;
390 }
391 }
392 if (killed)
393 show_dir_entry(tag_killed, dir[i]);
394 }
395 }
396
397 static void show_ce_entry(const char *tag, struct cache_entry *ce)
398 {
399 int len = prefix_len;
400 int offset = prefix_offset;
401
402 if (len >= ce_namelen(ce))
403 die("git-ls-files: internal error - cache entry not superset of prefix");
404
405 if (pathspec && !match(pathspec, ce->name, len))
406 return;
407
408 if (!show_stage)
409 printf("%s%s%c", tag, ce->name + offset, line_terminator);
410 else
411 printf("%s%06o %s %d\t%s%c",
412 tag,
413 ntohl(ce->ce_mode),
414 sha1_to_hex(ce->sha1),
415 ce_stage(ce),
416 ce->name + offset, line_terminator);
417 }
418
419 static void show_files(void)
420 {
421 int i;
422
423 /* For cached/deleted files we don't need to even do the readdir */
424 if (show_others || show_killed) {
425 const char *path = ".", *base = "";
426 int baselen = prefix_len;
427
428 if (baselen)
429 path = base = prefix;
430 read_directory(path, base, baselen);
431 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
432 if (show_others)
433 for (i = 0; i < nr_dir; i++)
434 show_dir_entry(tag_other, dir[i]);
435 if (show_killed)
436 show_killed_files();
437 }
438 if (show_cached | show_stage) {
439 for (i = 0; i < active_nr; i++) {
440 struct cache_entry *ce = active_cache[i];
441 if (excluded(ce->name) != show_ignored)
442 continue;
443 if (show_unmerged && !ce_stage(ce))
444 continue;
445 show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
446 }
447 }
448 if (show_deleted | show_modified) {
449 for (i = 0; i < active_nr; i++) {
450 struct cache_entry *ce = active_cache[i];
451 struct stat st;
452 int err;
453 if (excluded(ce->name) != show_ignored)
454 continue;
455 err = lstat(ce->name, &st);
456 if (show_deleted && err)
457 show_ce_entry(tag_removed, ce);
458 if (show_modified && ce_modified(ce, &st))
459 show_ce_entry(tag_modified, ce);
460 }
461 }
462 }
463
464 /*
465 * Prune the index to only contain stuff starting with "prefix"
466 */
467 static void prune_cache(void)
468 {
469 int pos = cache_name_pos(prefix, prefix_len);
470 unsigned int first, last;
471
472 if (pos < 0)
473 pos = -pos-1;
474 active_cache += pos;
475 active_nr -= pos;
476 first = 0;
477 last = active_nr;
478 while (last > first) {
479 int next = (last + first) >> 1;
480 struct cache_entry *ce = active_cache[next];
481 if (!strncmp(ce->name, prefix, prefix_len)) {
482 first = next+1;
483 continue;
484 }
485 last = next;
486 }
487 active_nr = last;
488 }
489
490 static void verify_pathspec(void)
491 {
492 const char **p, *n, *prev;
493 char *real_prefix;
494 unsigned long max;
495
496 prev = NULL;
497 max = PATH_MAX;
498 for (p = pathspec; (n = *p) != NULL; p++) {
499 int i, len = 0;
500 for (i = 0; i < max; i++) {
501 char c = n[i];
502 if (prev && prev[i] != c)
503 break;
504 if (!c || c == '*' || c == '?')
505 break;
506 if (c == '/')
507 len = i+1;
508 }
509 prev = n;
510 if (len < max) {
511 max = len;
512 if (!max)
513 break;
514 }
515 }
516
517 if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
518 die("git-ls-files: cannot generate relative filenames containing '..'");
519
520 real_prefix = NULL;
521 prefix_len = max;
522 if (max) {
523 real_prefix = xmalloc(max + 1);
524 memcpy(real_prefix, prev, max);
525 real_prefix[max] = 0;
526 }
527 prefix = real_prefix;
528 }
529
530 static const char ls_files_usage[] =
531 "git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
532 "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
533 "[ --exclude-per-directory=<filename> ]";
534
535 int main(int argc, const char **argv)
536 {
537 int i;
538 int exc_given = 0;
539
540 prefix = setup_git_directory();
541 if (prefix)
542 prefix_offset = strlen(prefix);
543
544 for (i = 1; i < argc; i++) {
545 const char *arg = argv[i];
546
547 if (!strcmp(arg, "-z")) {
548 line_terminator = 0;
549 continue;
550 }
551 if (!strcmp(arg, "-t")) {
552 tag_cached = "H ";
553 tag_unmerged = "M ";
554 tag_removed = "R ";
555 tag_modified = "C ";
556 tag_other = "? ";
557 tag_killed = "K ";
558 continue;
559 }
560 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
561 show_cached = 1;
562 continue;
563 }
564 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
565 show_deleted = 1;
566 continue;
567 }
568 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
569 show_modified = 1;
570 continue;
571 }
572 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
573 show_others = 1;
574 continue;
575 }
576 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
577 show_ignored = 1;
578 continue;
579 }
580 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
581 show_stage = 1;
582 continue;
583 }
584 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
585 show_killed = 1;
586 continue;
587 }
588 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
589 /* There's no point in showing unmerged unless
590 * you also show the stage information.
591 */
592 show_stage = 1;
593 show_unmerged = 1;
594 continue;
595 }
596 if (!strcmp(arg, "-x") && i+1 < argc) {
597 exc_given = 1;
598 add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
599 continue;
600 }
601 if (!strncmp(arg, "--exclude=", 10)) {
602 exc_given = 1;
603 add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
604 continue;
605 }
606 if (!strcmp(arg, "-X") && i+1 < argc) {
607 exc_given = 1;
608 add_excludes_from_file(argv[++i]);
609 continue;
610 }
611 if (!strncmp(arg, "--exclude-from=", 15)) {
612 exc_given = 1;
613 add_excludes_from_file(arg+15);
614 continue;
615 }
616 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
617 exc_given = 1;
618 exclude_per_dir = arg + 24;
619 continue;
620 }
621 if (!strcmp(arg, "--full-name")) {
622 prefix_offset = 0;
623 continue;
624 }
625 if (*arg == '-')
626 usage(ls_files_usage);
627 break;
628 }
629
630 pathspec = get_pathspec(prefix, argv + i);
631
632 /* Verify that the pathspec matches the prefix */
633 if (pathspec)
634 verify_pathspec();
635
636 if (show_ignored && !exc_given) {
637 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
638 argv[0]);
639 exit(1);
640 }
641
642 /* With no flags, we default to showing the cached files */
643 if (!(show_stage | show_deleted | show_others | show_unmerged |
644 show_killed | show_modified))
645 show_cached = 1;
646
647 read_cache();
648 if (prefix)
649 prune_cache();
650 show_files();
651 return 0;
652 }