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#include "cache.h"
12static int show_deleted = 0;
14static int show_cached = 0;
15static int show_others = 0;
16static int show_ignored = 0;
17static int show_stage = 0;
18static int show_unmerged = 0;
19static int show_killed = 0;
20static int line_terminator = '\n';
21static int prefix_len = 0, prefix_offset = 0;
23static const char *prefix = NULL;
24static const char **pathspec = NULL;
25static const char *tag_cached = "";
27static const char *tag_unmerged = "";
28static const char *tag_removed = "";
29static const char *tag_other = "";
30static const char *tag_killed = "";
31static char *exclude_per_dir = NULL;
33/* We maintain three exclude pattern lists:
35 * EXC_CMDL lists patterns explicitly given on the command line.
36 * EXC_DIRS lists patterns obtained from per-directory ignore files.
37 * EXC_FILE lists patterns from fallback ignore files.
38 */
39#define EXC_CMDL 0
40#define EXC_DIRS 1
41#define EXC_FILE 2
42static struct exclude_list {
43 int nr;
44 int alloc;
45 struct exclude {
46 const char *pattern;
47 const char *base;
48 int baselen;
49 } **excludes;
50} exclude_list[3];
51static void add_exclude(const char *string, const char *base,
53 int baselen, struct exclude_list *which)
54{
55 struct exclude *x = xmalloc(sizeof (*x));
56 x->pattern = string;
58 x->base = base;
59 x->baselen = baselen;
60 if (which->nr == which->alloc) {
61 which->alloc = alloc_nr(which->alloc);
62 which->excludes = realloc(which->excludes,
63 which->alloc * sizeof(x));
64 }
65 which->excludes[which->nr++] = x;
66}
67static int add_excludes_from_file_1(const char *fname,
69 const char *base,
70 int baselen,
71 struct exclude_list *which)
72{
73 int fd, i;
74 long size;
75 char *buf, *entry;
76 fd = open(fname, O_RDONLY);
78 if (fd < 0)
79 goto err;
80 size = lseek(fd, 0, SEEK_END);
81 if (size < 0)
82 goto err;
83 lseek(fd, 0, SEEK_SET);
84 if (size == 0) {
85 close(fd);
86 return 0;
87 }
88 buf = xmalloc(size);
89 if (read(fd, buf, size) != size)
90 goto err;
91 close(fd);
92 entry = buf;
94 for (i = 0; i < size; i++) {
95 if (buf[i] == '\n') {
96 if (entry != buf + i && entry[0] != '#') {
97 buf[i] = 0;
98 add_exclude(entry, base, baselen, which);
99 }
100 entry = buf + i + 1;
101 }
102 }
103 return 0;
104 err:
106 if (0 <= fd)
107 close(fd);
108 return -1;
109}
110static void add_excludes_from_file(const char *fname)
112{
113 if (add_excludes_from_file_1(fname, "", 0,
114 &exclude_list[EXC_FILE]) < 0)
115 die("cannot use %s as an exclude file", fname);
116}
117static int push_exclude_per_directory(const char *base, int baselen)
119{
120 char exclude_file[PATH_MAX];
121 struct exclude_list *el = &exclude_list[EXC_DIRS];
122 int current_nr = el->nr;
123 if (exclude_per_dir) {
125 memcpy(exclude_file, base, baselen);
126 strcpy(exclude_file + baselen, exclude_per_dir);
127 add_excludes_from_file_1(exclude_file, base, baselen, el);
128 }
129 return current_nr;
130}
131static void pop_exclude_per_directory(int stk)
133{
134 struct exclude_list *el = &exclude_list[EXC_DIRS];
135 while (stk < el->nr)
137 free(el->excludes[--el->nr]);
138}
139/* Scan the list and let the last match determines the fate.
141 * Return 1 for exclude, 0 for include and -1 for undecided.
142 */
143static int excluded_1(const char *pathname,
144 int pathlen,
145 struct exclude_list *el)
146{
147 int i;
148 if (el->nr) {
150 for (i = el->nr - 1; 0 <= i; i--) {
151 struct exclude *x = el->excludes[i];
152 const char *exclude = x->pattern;
153 int to_exclude = 1;
154 if (*exclude == '!') {
156 to_exclude = 0;
157 exclude++;
158 }
159 if (!strchr(exclude, '/')) {
161 /* match basename */
162 const char *basename = strrchr(pathname, '/');
163 basename = (basename) ? basename+1 : pathname;
164 if (fnmatch(exclude, basename, 0) == 0)
165 return to_exclude;
166 }
167 else {
168 /* match with FNM_PATHNAME:
169 * exclude has base (baselen long) inplicitly
170 * in front of it.
171 */
172 int baselen = x->baselen;
173 if (*exclude == '/')
174 exclude++;
175 if (pathlen < baselen ||
177 (baselen && pathname[baselen-1] != '/') ||
178 strncmp(pathname, x->base, baselen))
179 continue;
180 if (fnmatch(exclude, pathname+baselen,
182 FNM_PATHNAME) == 0)
183 return to_exclude;
184 }
185 }
186 }
187 return -1; /* undecided */
188}
189static int excluded(const char *pathname)
191{
192 int pathlen = strlen(pathname);
193 int st;
194 for (st = EXC_CMDL; st <= EXC_FILE; st++) {
196 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
197 case 0:
198 return 0;
199 case 1:
200 return 1;
201 }
202 }
203 return 0;
204}
205struct nond_on_fs {
207 int len;
208 char name[0];
209};
210static struct nond_on_fs **dir;
212static int nr_dir;
213static int dir_alloc;
214static void add_name(const char *pathname, int len)
216{
217 struct nond_on_fs *ent;
218 if (cache_name_pos(pathname, len) >= 0)
220 return;
221 if (nr_dir == dir_alloc) {
223 dir_alloc = alloc_nr(dir_alloc);
224 dir = xrealloc(dir, dir_alloc*sizeof(ent));
225 }
226 ent = xmalloc(sizeof(*ent) + len + 1);
227 ent->len = len;
228 memcpy(ent->name, pathname, len);
229 ent->name[len] = 0;
230 dir[nr_dir++] = ent;
231}
232/*
234 * Read a directory tree. We currently ignore anything but
235 * directories, regular files and symlinks. That's because git
236 * doesn't handle them at all yet. Maybe that will change some
237 * day.
238 *
239 * Also, we ignore the name ".git" (even if it is not a directory).
240 * That likely will not change.
241 */
242static void read_directory(const char *path, const char *base, int baselen)
243{
244 DIR *dir = opendir(path);
245 if (dir) {
247 int exclude_stk;
248 struct dirent *de;
249 char fullname[MAXPATHLEN + 1];
250 memcpy(fullname, base, baselen);
251 exclude_stk = push_exclude_per_directory(base, baselen);
253 while ((de = readdir(dir)) != NULL) {
255 int len;
256 if ((de->d_name[0] == '.') &&
258 (de->d_name[1] == 0 ||
259 !strcmp(de->d_name + 1, ".") ||
260 !strcmp(de->d_name + 1, "git")))
261 continue;
262 len = strlen(de->d_name);
263 memcpy(fullname + baselen, de->d_name, len+1);
264 if (excluded(fullname) != show_ignored)
265 continue;
266 switch (DTYPE(de)) {
268 struct stat st;
269 default:
270 continue;
271 case DT_UNKNOWN:
272 if (lstat(fullname, &st))
273 continue;
274 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
275 break;
276 if (!S_ISDIR(st.st_mode))
277 continue;
278 /* fallthrough */
279 case DT_DIR:
280 memcpy(fullname + baselen + len, "/", 2);
281 read_directory(fullname, fullname,
282 baselen + len + 1);
283 continue;
284 case DT_REG:
285 case DT_LNK:
286 break;
287 }
288 add_name(fullname, baselen + len);
289 }
290 closedir(dir);
291 pop_exclude_per_directory(exclude_stk);
293 }
294}
295static int cmp_name(const void *p1, const void *p2)
297{
298 const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
299 const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
300 return cache_name_compare(e1->name, e1->len,
302 e2->name, e2->len);
303}
304/*
306 * Match a pathspec against a filename. The first "len" characters
307 * are the common prefix
308 */
309static int match(const char **spec, const char *filename, int len)
310{
311 const char *m;
312 while ((m = *spec++) != NULL) {
314 int matchlen = strlen(m + len);
315 if (!matchlen)
317 return 1;
318 if (!strncmp(m + len, filename + len, matchlen)) {
319 if (m[len + matchlen - 1] == '/')
320 return 1;
321 switch (filename[len + matchlen]) {
322 case '/': case '\0':
323 return 1;
324 }
325 }
326 if (!fnmatch(m + len, filename + len, 0))
327 return 1;
328 }
329 return 0;
330}
331static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
333{
334 int len = prefix_len;
335 int offset = prefix_offset;
336 if (len >= ent->len)
338 die("git-ls-files: internal error - directory entry not superset of prefix");
339 if (pathspec && !match(pathspec, ent->name, len))
341 return;
342 printf("%s%s%c", tag, ent->name + offset, line_terminator);
344}
345static void show_killed_files(void)
347{
348 int i;
349 for (i = 0; i < nr_dir; i++) {
350 struct nond_on_fs *ent = dir[i];
351 char *cp, *sp;
352 int pos, len, killed = 0;
353 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
355 sp = strchr(cp, '/');
356 if (!sp) {
357 /* If ent->name is prefix of an entry in the
358 * cache, it will be killed.
359 */
360 pos = cache_name_pos(ent->name, ent->len);
361 if (0 <= pos)
362 die("bug in show-killed-files");
363 pos = -pos - 1;
364 while (pos < active_nr &&
365 ce_stage(active_cache[pos]))
366 pos++; /* skip unmerged */
367 if (active_nr <= pos)
368 break;
369 /* pos points at a name immediately after
370 * ent->name in the cache. Does it expect
371 * ent->name to be a directory?
372 */
373 len = ce_namelen(active_cache[pos]);
374 if ((ent->len < len) &&
375 !strncmp(active_cache[pos]->name,
376 ent->name, ent->len) &&
377 active_cache[pos]->name[ent->len] == '/')
378 killed = 1;
379 break;
380 }
381 if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
382 /* If any of the leading directories in
383 * ent->name is registered in the cache,
384 * ent->name will be killed.
385 */
386 killed = 1;
387 break;
388 }
389 }
390 if (killed)
391 show_dir_entry(tag_killed, dir[i]);
392 }
393}
394static void show_ce_entry(const char *tag, struct cache_entry *ce)
396{
397 int len = prefix_len;
398 int offset = prefix_offset;
399 if (len >= ce_namelen(ce))
401 die("git-ls-files: internal error - cache entry not superset of prefix");
402 if (pathspec && !match(pathspec, ce->name, len))
404 return;
405 if (!show_stage)
407 printf("%s%s%c", tag, ce->name + offset, line_terminator);
408 else
409 printf("%s%06o %s %d\t%s%c",
410 tag,
411 ntohl(ce->ce_mode),
412 sha1_to_hex(ce->sha1),
413 ce_stage(ce),
414 ce->name + offset, line_terminator);
415}
416static void show_files(void)
418{
419 int i;
420 /* For cached/deleted files we don't need to even do the readdir */
422 if (show_others || show_killed) {
423 const char *path = ".", *base = "";
424 int baselen = prefix_len;
425 if (baselen)
427 path = base = prefix;
428 read_directory(path, base, baselen);
429 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
430 if (show_others)
431 for (i = 0; i < nr_dir; i++)
432 show_dir_entry(tag_other, dir[i]);
433 if (show_killed)
434 show_killed_files();
435 }
436 if (show_cached | show_stage) {
437 for (i = 0; i < active_nr; i++) {
438 struct cache_entry *ce = active_cache[i];
439 if (excluded(ce->name) != show_ignored)
440 continue;
441 if (show_unmerged && !ce_stage(ce))
442 continue;
443 show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
444 }
445 }
446 if (show_deleted) {
447 for (i = 0; i < active_nr; i++) {
448 struct cache_entry *ce = active_cache[i];
449 struct stat st;
450 if (excluded(ce->name) != show_ignored)
451 continue;
452 if (!lstat(ce->name, &st))
453 continue;
454 show_ce_entry(tag_removed, ce);
455 }
456 }
457}
458/*
460 * Prune the index to only contain stuff starting with "prefix"
461 */
462static void prune_cache(void)
463{
464 int pos = cache_name_pos(prefix, prefix_len);
465 unsigned int first, last;
466 if (pos < 0)
468 pos = -pos-1;
469 active_cache += pos;
470 active_nr -= pos;
471 first = 0;
472 last = active_nr;
473 while (last > first) {
474 int next = (last + first) >> 1;
475 struct cache_entry *ce = active_cache[next];
476 if (!strncmp(ce->name, prefix, prefix_len)) {
477 first = next+1;
478 continue;
479 }
480 last = next;
481 }
482 active_nr = last;
483}
484static void verify_pathspec(void)
486{
487 const char **p, *n, *prev;
488 char *real_prefix;
489 unsigned long max;
490 prev = NULL;
492 max = PATH_MAX;
493 for (p = pathspec; (n = *p) != NULL; p++) {
494 int i, len = 0;
495 for (i = 0; i < max; i++) {
496 char c = n[i];
497 if (prev && prev[i] != c)
498 break;
499 if (c == '*' || c == '?')
500 break;
501 if (c == '/')
502 len = i+1;
503 }
504 prev = n;
505 if (len < max) {
506 max = len;
507 if (!max)
508 break;
509 }
510 }
511 if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
513 die("git-ls-files: cannot generate relative filenames containing '..'");
514 real_prefix = NULL;
516 prefix_len = max;
517 if (max) {
518 real_prefix = xmalloc(max + 1);
519 memcpy(real_prefix, prev, max);
520 real_prefix[max] = 0;
521 }
522 prefix = real_prefix;
523}
524static const char ls_files_usage[] =
526 "git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed])* "
527 "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
528 "[ --exclude-per-directory=<filename> ]";
529int main(int argc, char **argv)
531{
532 int i;
533 int exc_given = 0;
534 prefix = setup_git_directory();
536 if (prefix)
537 prefix_offset = strlen(prefix);
538 for (i = 1; i < argc; i++) {
540 char *arg = argv[i];
541 if (!strcmp(arg, "-z")) {
543 line_terminator = 0;
544 continue;
545 }
546 if (!strcmp(arg, "-t")) {
547 tag_cached = "H ";
548 tag_unmerged = "M ";
549 tag_removed = "R ";
550 tag_other = "? ";
551 tag_killed = "K ";
552 continue;
553 }
554 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
555 show_cached = 1;
556 continue;
557 }
558 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
559 show_deleted = 1;
560 continue;
561 }
562 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
563 show_others = 1;
564 continue;
565 }
566 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
567 show_ignored = 1;
568 continue;
569 }
570 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
571 show_stage = 1;
572 continue;
573 }
574 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
575 show_killed = 1;
576 continue;
577 }
578 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
579 /* There's no point in showing unmerged unless
580 * you also show the stage information.
581 */
582 show_stage = 1;
583 show_unmerged = 1;
584 continue;
585 }
586 if (!strcmp(arg, "-x") && i+1 < argc) {
587 exc_given = 1;
588 add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
589 continue;
590 }
591 if (!strncmp(arg, "--exclude=", 10)) {
592 exc_given = 1;
593 add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
594 continue;
595 }
596 if (!strcmp(arg, "-X") && i+1 < argc) {
597 exc_given = 1;
598 add_excludes_from_file(argv[++i]);
599 continue;
600 }
601 if (!strncmp(arg, "--exclude-from=", 15)) {
602 exc_given = 1;
603 add_excludes_from_file(arg+15);
604 continue;
605 }
606 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
607 exc_given = 1;
608 exclude_per_dir = arg + 24;
609 continue;
610 }
611 if (!strcmp(arg, "--full-name")) {
612 prefix_offset = 0;
613 continue;
614 }
615 if (*arg == '-')
616 usage(ls_files_usage);
617 break;
618 }
619 pathspec = get_pathspec(prefix, argv + i);
621 /* Verify that the pathspec matches the prefix */
623 if (pathspec)
624 verify_pathspec();
625 if (show_ignored && !exc_given) {
627 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
628 argv[0]);
629 exit(1);
630 }
631 /* With no flags, we default to showing the cached files */
633 if (!(show_stage | show_deleted | show_others | show_unmerged | show_killed))
634 show_cached = 1;
635 read_cache();
637 if (prefix)
638 prune_cache();
639 show_files();
640 return 0;
641}