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