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 const char *tag_cached = "";
30static const char *tag_unmerged = "";
31static const char *tag_removed = "";
32static const char *tag_other = "";
33static const char *tag_killed = "";
34static const char *tag_modified = "";
35static const char *exclude_per_dir = NULL;
37/* We maintain three exclude pattern lists:
39 * EXC_CMDL lists patterns explicitly given on the command line.
40 * EXC_DIRS lists patterns obtained from per-directory ignore files.
41 * EXC_FILE lists patterns from fallback ignore files.
42 */
43#define EXC_CMDL 0
44#define EXC_DIRS 1
45#define EXC_FILE 2
46static struct exclude_list {
47 int nr;
48 int alloc;
49 struct exclude {
50 const char *pattern;
51 const char *base;
52 int baselen;
53 } **excludes;
54} exclude_list[3];
55static void add_exclude(const char *string, const char *base,
57 int baselen, struct exclude_list *which)
58{
59 struct exclude *x = xmalloc(sizeof (*x));
60 x->pattern = string;
62 x->base = base;
63 x->baselen = baselen;
64 if (which->nr == which->alloc) {
65 which->alloc = alloc_nr(which->alloc);
66 which->excludes = realloc(which->excludes,
67 which->alloc * sizeof(x));
68 }
69 which->excludes[which->nr++] = x;
70}
71static int add_excludes_from_file_1(const char *fname,
73 const char *base,
74 int baselen,
75 struct exclude_list *which)
76{
77 int fd, i;
78 long size;
79 char *buf, *entry;
80 fd = open(fname, O_RDONLY);
82 if (fd < 0)
83 goto err;
84 size = lseek(fd, 0, SEEK_END);
85 if (size < 0)
86 goto err;
87 lseek(fd, 0, SEEK_SET);
88 if (size == 0) {
89 close(fd);
90 return 0;
91 }
92 buf = xmalloc(size);
93 if (read(fd, buf, size) != size)
94 goto err;
95 close(fd);
96 entry = buf;
98 for (i = 0; i < size; i++) {
99 if (buf[i] == '\n') {
100 if (entry != buf + i && entry[0] != '#') {
101 buf[i - (i && buf[i-1] == '\r')] = 0;
102 add_exclude(entry, base, baselen, which);
103 }
104 entry = buf + i + 1;
105 }
106 }
107 return 0;
108 err:
110 if (0 <= fd)
111 close(fd);
112 return -1;
113}
114static void add_excludes_from_file(const char *fname)
116{
117 if (add_excludes_from_file_1(fname, "", 0,
118 &exclude_list[EXC_FILE]) < 0)
119 die("cannot use %s as an exclude file", fname);
120}
121static int push_exclude_per_directory(const char *base, int baselen)
123{
124 char exclude_file[PATH_MAX];
125 struct exclude_list *el = &exclude_list[EXC_DIRS];
126 int current_nr = el->nr;
127 if (exclude_per_dir) {
129 memcpy(exclude_file, base, baselen);
130 strcpy(exclude_file + baselen, exclude_per_dir);
131 add_excludes_from_file_1(exclude_file, base, baselen, el);
132 }
133 return current_nr;
134}
135static void pop_exclude_per_directory(int stk)
137{
138 struct exclude_list *el = &exclude_list[EXC_DIRS];
139 while (stk < el->nr)
141 free(el->excludes[--el->nr]);
142}
143/* Scan the list and let the last match determines the fate.
145 * Return 1 for exclude, 0 for include and -1 for undecided.
146 */
147static int excluded_1(const char *pathname,
148 int pathlen,
149 struct exclude_list *el)
150{
151 int i;
152 if (el->nr) {
154 for (i = el->nr - 1; 0 <= i; i--) {
155 struct exclude *x = el->excludes[i];
156 const char *exclude = x->pattern;
157 int to_exclude = 1;
158 if (*exclude == '!') {
160 to_exclude = 0;
161 exclude++;
162 }
163 if (!strchr(exclude, '/')) {
165 /* match basename */
166 const char *basename = strrchr(pathname, '/');
167 basename = (basename) ? basename+1 : pathname;
168 if (fnmatch(exclude, basename, 0) == 0)
169 return to_exclude;
170 }
171 else {
172 /* match with FNM_PATHNAME:
173 * exclude has base (baselen long) implicitly
174 * in front of it.
175 */
176 int baselen = x->baselen;
177 if (*exclude == '/')
178 exclude++;
179 if (pathlen < baselen ||
181 (baselen && pathname[baselen-1] != '/') ||
182 strncmp(pathname, x->base, baselen))
183 continue;
184 if (fnmatch(exclude, pathname+baselen,
186 FNM_PATHNAME) == 0)
187 return to_exclude;
188 }
189 }
190 }
191 return -1; /* undecided */
192}
193static int excluded(const char *pathname)
195{
196 int pathlen = strlen(pathname);
197 int st;
198 for (st = EXC_CMDL; st <= EXC_FILE; st++) {
200 switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
201 case 0:
202 return 0;
203 case 1:
204 return 1;
205 }
206 }
207 return 0;
208}
209struct nond_on_fs {
211 int len;
212 char name[0];
213};
214static struct nond_on_fs **dir;
216static int nr_dir;
217static int dir_alloc;
218static void add_name(const char *pathname, int len)
220{
221 struct nond_on_fs *ent;
222 if (cache_name_pos(pathname, len) >= 0)
224 return;
225 if (nr_dir == dir_alloc) {
227 dir_alloc = alloc_nr(dir_alloc);
228 dir = xrealloc(dir, dir_alloc*sizeof(ent));
229 }
230 ent = xmalloc(sizeof(*ent) + len + 1);
231 ent->len = len;
232 memcpy(ent->name, pathname, len);
233 ent->name[len] = 0;
234 dir[nr_dir++] = ent;
235}
236static int dir_exists(const char *dirname, int len)
238{
239 int pos = cache_name_pos(dirname, len);
240 if (pos >= 0)
241 return 1;
242 pos = -pos-1;
243 if (pos >= active_nr) /* can't */
244 return 0;
245 return !strncmp(active_cache[pos]->name, dirname, len);
246}
247/*
249 * Read a directory tree. We currently ignore anything but
250 * directories, regular files and symlinks. That's because git
251 * doesn't handle them at all yet. Maybe that will change some
252 * day.
253 *
254 * Also, we ignore the name ".git" (even if it is not a directory).
255 * That likely will not change.
256 */
257static void read_directory(const char *path, const char *base, int baselen)
258{
259 DIR *dir = opendir(path);
260 if (dir) {
262 int exclude_stk;
263 struct dirent *de;
264 char fullname[MAXPATHLEN + 1];
265 memcpy(fullname, base, baselen);
266 exclude_stk = push_exclude_per_directory(base, baselen);
268 while ((de = readdir(dir)) != NULL) {
270 int len;
271 if ((de->d_name[0] == '.') &&
273 (de->d_name[1] == 0 ||
274 !strcmp(de->d_name + 1, ".") ||
275 !strcmp(de->d_name + 1, "git")))
276 continue;
277 len = strlen(de->d_name);
278 memcpy(fullname + baselen, de->d_name, len+1);
279 if (excluded(fullname) != show_ignored)
280 continue;
281 switch (DTYPE(de)) {
283 struct stat st;
284 default:
285 continue;
286 case DT_UNKNOWN:
287 if (lstat(fullname, &st))
288 continue;
289 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
290 break;
291 if (!S_ISDIR(st.st_mode))
292 continue;
293 /* fallthrough */
294 case DT_DIR:
295 memcpy(fullname + baselen + len, "/", 2);
296 len++;
297 if (show_other_directories &&
298 !dir_exists(fullname, baselen + len))
299 break;
300 read_directory(fullname, fullname,
301 baselen + len);
302 continue;
303 case DT_REG:
304 case DT_LNK:
305 break;
306 }
307 add_name(fullname, baselen + len);
308 }
309 closedir(dir);
310 pop_exclude_per_directory(exclude_stk);
312 }
313}
314static int cmp_name(const void *p1, const void *p2)
316{
317 const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
318 const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
319 return cache_name_compare(e1->name, e1->len,
321 e2->name, e2->len);
322}
323/*
325 * Match a pathspec against a filename. The first "len" characters
326 * are the common prefix
327 */
328static int match(const char **spec, const char *filename, int len)
329{
330 const char *m;
331 while ((m = *spec++) != NULL) {
333 int matchlen = strlen(m + len);
334 if (!matchlen)
336 return 1;
337 if (!strncmp(m + len, filename + len, matchlen)) {
338 if (m[len + matchlen - 1] == '/')
339 return 1;
340 switch (filename[len + matchlen]) {
341 case '/': case '\0':
342 return 1;
343 }
344 }
345 if (!fnmatch(m + len, filename + len, 0))
346 return 1;
347 }
348 return 0;
349}
350static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
352{
353 int len = prefix_len;
354 int offset = prefix_offset;
355 if (len >= ent->len)
357 die("git-ls-files: internal error - directory entry not superset of prefix");
358 if (pathspec && !match(pathspec, ent->name, len))
360 return;
361 fputs(tag, stdout);
363 write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
364 putchar(line_terminator);
365}
366static void show_other_files(void)
368{
369 int i;
370 for (i = 0; i < nr_dir; i++) {
371 /* We should not have a matching entry, but we
372 * may have an unmerged entry for this path.
373 */
374 struct nond_on_fs *ent = dir[i];
375 int pos = cache_name_pos(ent->name, ent->len);
376 struct cache_entry *ce;
377 if (0 <= pos)
378 die("bug in show-other-files");
379 pos = -pos - 1;
380 if (pos < active_nr) {
381 ce = active_cache[pos];
382 if (ce_namelen(ce) == ent->len &&
383 !memcmp(ce->name, ent->name, ent->len))
384 continue; /* Yup, this one exists unmerged */
385 }
386 show_dir_entry(tag_other, ent);
387 }
388}
389static void show_killed_files(void)
391{
392 int i;
393 for (i = 0; i < nr_dir; i++) {
394 struct nond_on_fs *ent = dir[i];
395 char *cp, *sp;
396 int pos, len, killed = 0;
397 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
399 sp = strchr(cp, '/');
400 if (!sp) {
401 /* If ent->name is prefix of an entry in the
402 * cache, it will be killed.
403 */
404 pos = cache_name_pos(ent->name, ent->len);
405 if (0 <= pos)
406 die("bug in show-killed-files");
407 pos = -pos - 1;
408 while (pos < active_nr &&
409 ce_stage(active_cache[pos]))
410 pos++; /* skip unmerged */
411 if (active_nr <= pos)
412 break;
413 /* pos points at a name immediately after
414 * ent->name in the cache. Does it expect
415 * ent->name to be a directory?
416 */
417 len = ce_namelen(active_cache[pos]);
418 if ((ent->len < len) &&
419 !strncmp(active_cache[pos]->name,
420 ent->name, ent->len) &&
421 active_cache[pos]->name[ent->len] == '/')
422 killed = 1;
423 break;
424 }
425 if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
426 /* If any of the leading directories in
427 * ent->name is registered in the cache,
428 * ent->name will be killed.
429 */
430 killed = 1;
431 break;
432 }
433 }
434 if (killed)
435 show_dir_entry(tag_killed, dir[i]);
436 }
437}
438static void show_ce_entry(const char *tag, struct cache_entry *ce)
440{
441 int len = prefix_len;
442 int offset = prefix_offset;
443 if (len >= ce_namelen(ce))
445 die("git-ls-files: internal error - cache entry not superset of prefix");
446 if (pathspec && !match(pathspec, ce->name, len))
448 return;
449 if (!show_stage) {
451 fputs(tag, stdout);
452 write_name_quoted("", 0, ce->name + offset,
453 line_terminator, stdout);
454 putchar(line_terminator);
455 }
456 else {
457 printf("%s%06o %s %d\t",
458 tag,
459 ntohl(ce->ce_mode),
460 sha1_to_hex(ce->sha1),
461 ce_stage(ce));
462 write_name_quoted("", 0, ce->name + offset,
463 line_terminator, stdout);
464 putchar(line_terminator);
465 }
466}
467static void show_files(void)
469{
470 int i;
471 /* For cached/deleted files we don't need to even do the readdir */
473 if (show_others || show_killed) {
474 const char *path = ".", *base = "";
475 int baselen = prefix_len;
476 if (baselen)
478 path = base = prefix;
479 read_directory(path, base, baselen);
480 qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
481 if (show_others)
482 show_other_files();
483 if (show_killed)
484 show_killed_files();
485 }
486 if (show_cached | show_stage) {
487 for (i = 0; i < active_nr; i++) {
488 struct cache_entry *ce = active_cache[i];
489 if (excluded(ce->name) != show_ignored)
490 continue;
491 if (show_unmerged && !ce_stage(ce))
492 continue;
493 show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
494 }
495 }
496 if (show_deleted | show_modified) {
497 for (i = 0; i < active_nr; i++) {
498 struct cache_entry *ce = active_cache[i];
499 struct stat st;
500 int err;
501 if (excluded(ce->name) != show_ignored)
502 continue;
503 err = lstat(ce->name, &st);
504 if (show_deleted && err)
505 show_ce_entry(tag_removed, ce);
506 if (show_modified && ce_modified(ce, &st))
507 show_ce_entry(tag_modified, ce);
508 }
509 }
510}
511/*
513 * Prune the index to only contain stuff starting with "prefix"
514 */
515static void prune_cache(void)
516{
517 int pos = cache_name_pos(prefix, prefix_len);
518 unsigned int first, last;
519 if (pos < 0)
521 pos = -pos-1;
522 active_cache += pos;
523 active_nr -= pos;
524 first = 0;
525 last = active_nr;
526 while (last > first) {
527 int next = (last + first) >> 1;
528 struct cache_entry *ce = active_cache[next];
529 if (!strncmp(ce->name, prefix, prefix_len)) {
530 first = next+1;
531 continue;
532 }
533 last = next;
534 }
535 active_nr = last;
536}
537static void verify_pathspec(void)
539{
540 const char **p, *n, *prev;
541 char *real_prefix;
542 unsigned long max;
543 prev = NULL;
545 max = PATH_MAX;
546 for (p = pathspec; (n = *p) != NULL; p++) {
547 int i, len = 0;
548 for (i = 0; i < max; i++) {
549 char c = n[i];
550 if (prev && prev[i] != c)
551 break;
552 if (!c || c == '*' || c == '?')
553 break;
554 if (c == '/')
555 len = i+1;
556 }
557 prev = n;
558 if (len < max) {
559 max = len;
560 if (!max)
561 break;
562 }
563 }
564 if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
566 die("git-ls-files: cannot generate relative filenames containing '..'");
567 real_prefix = NULL;
569 prefix_len = max;
570 if (max) {
571 real_prefix = xmalloc(max + 1);
572 memcpy(real_prefix, prev, max);
573 real_prefix[max] = 0;
574 }
575 prefix = real_prefix;
576}
577static const char ls_files_usage[] =
579 "git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
580 "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
581 "[ --exclude-per-directory=<filename> ] [--full-name] [--] [<file>]*";
582int main(int argc, const char **argv)
584{
585 int i;
586 int exc_given = 0;
587 prefix = setup_git_directory();
589 if (prefix)
590 prefix_offset = strlen(prefix);
591 git_config(git_default_config);
592 for (i = 1; i < argc; i++) {
594 const char *arg = argv[i];
595 if (!strcmp(arg, "--")) {
597 i++;
598 break;
599 }
600 if (!strcmp(arg, "-z")) {
601 line_terminator = 0;
602 continue;
603 }
604 if (!strcmp(arg, "-t")) {
605 tag_cached = "H ";
606 tag_unmerged = "M ";
607 tag_removed = "R ";
608 tag_modified = "C ";
609 tag_other = "? ";
610 tag_killed = "K ";
611 continue;
612 }
613 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
614 show_cached = 1;
615 continue;
616 }
617 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
618 show_deleted = 1;
619 continue;
620 }
621 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
622 show_modified = 1;
623 continue;
624 }
625 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
626 show_others = 1;
627 continue;
628 }
629 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
630 show_ignored = 1;
631 continue;
632 }
633 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
634 show_stage = 1;
635 continue;
636 }
637 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
638 show_killed = 1;
639 continue;
640 }
641 if (!strcmp(arg, "--directory")) {
642 show_other_directories = 1;
643 continue;
644 }
645 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
646 /* There's no point in showing unmerged unless
647 * you also show the stage information.
648 */
649 show_stage = 1;
650 show_unmerged = 1;
651 continue;
652 }
653 if (!strcmp(arg, "-x") && i+1 < argc) {
654 exc_given = 1;
655 add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
656 continue;
657 }
658 if (!strncmp(arg, "--exclude=", 10)) {
659 exc_given = 1;
660 add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
661 continue;
662 }
663 if (!strcmp(arg, "-X") && i+1 < argc) {
664 exc_given = 1;
665 add_excludes_from_file(argv[++i]);
666 continue;
667 }
668 if (!strncmp(arg, "--exclude-from=", 15)) {
669 exc_given = 1;
670 add_excludes_from_file(arg+15);
671 continue;
672 }
673 if (!strncmp(arg, "--exclude-per-directory=", 24)) {
674 exc_given = 1;
675 exclude_per_dir = arg + 24;
676 continue;
677 }
678 if (!strcmp(arg, "--full-name")) {
679 prefix_offset = 0;
680 continue;
681 }
682 if (*arg == '-')
683 usage(ls_files_usage);
684 break;
685 }
686 pathspec = get_pathspec(prefix, argv + i);
688 /* Verify that the pathspec matches the prefix */
690 if (pathspec)
691 verify_pathspec();
692 if (show_ignored && !exc_given) {
694 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
695 argv[0]);
696 exit(1);
697 }
698 /* With no flags, we default to showing the cached files */
700 if (!(show_stage | show_deleted | show_others | show_unmerged |
701 show_killed | show_modified))
702 show_cached = 1;
703 read_cache();
705 if (prefix)
706 prune_cache();
707 show_files();
708 return 0;
709}