Fix a crash in ls-remote when refspec expands into nothing
[git/git-p4.git] / builtin-ls-files.c
blob6c1db86e8056285cb25359d55f5ebf9dd0e6f489
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.
6 * Copyright (C) Linus Torvalds, 2005
7 */
8 #include "cache.h"
9 #include "quote.h"
10 #include "dir.h"
11 #include "builtin.h"
12 #include "tree.h"
14 static int abbrev;
15 static int show_deleted;
16 static int show_cached;
17 static int show_others;
18 static int show_stage;
19 static int show_unmerged;
20 static int show_modified;
21 static int show_killed;
22 static int show_valid_bit;
23 static int line_terminator = '\n';
25 static int prefix_len;
26 static int prefix_offset;
27 static const char **pathspec;
28 static int error_unmatch;
29 static char *ps_matched;
30 static const char *with_tree;
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 = "";
41 * Match a pathspec against a filename. The first "len" characters
42 * are the common prefix
44 static int match(const char **spec, char *ps_matched,
45 const char *filename, int len)
47 const char *m;
49 while ((m = *spec++) != NULL) {
50 int matchlen = strlen(m + len);
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;
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;
72 return 0;
75 static void show_dir_entry(const char *tag, struct dir_entry *ent)
77 int len = prefix_len;
78 int offset = prefix_offset;
80 if (len >= ent->len)
81 die("git-ls-files: internal error - directory entry not superset of prefix");
83 if (pathspec && !match(pathspec, ps_matched, ent->name, len))
84 return;
86 fputs(tag, stdout);
87 write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
88 putchar(line_terminator);
91 static void show_other_files(struct dir_struct *dir)
93 int i;
97 * Skip matching and unmerged entries for the paths,
98 * since we want just "others".
100 * (Matching entries are normally pruned during
101 * the directory tree walk, but will show up for
102 * gitlinks because we don't necessarily have
103 * dir->show_other_directories set to suppress
104 * them).
106 for (i = 0; i < dir->nr; i++) {
107 struct dir_entry *ent = dir->entries[i];
108 int len, pos;
109 struct cache_entry *ce;
112 * Remove the '/' at the end that directory
113 * walking adds for directory entries.
115 len = ent->len;
116 if (len && ent->name[len-1] == '/')
117 len--;
118 pos = cache_name_pos(ent->name, len);
119 if (0 <= pos)
120 continue; /* exact match */
121 pos = -pos - 1;
122 if (pos < active_nr) {
123 ce = active_cache[pos];
124 if (ce_namelen(ce) == len &&
125 !memcmp(ce->name, ent->name, len))
126 continue; /* Yup, this one exists unmerged */
128 show_dir_entry(tag_other, ent);
132 static void show_killed_files(struct dir_struct *dir)
134 int i;
135 for (i = 0; i < dir->nr; i++) {
136 struct dir_entry *ent = dir->entries[i];
137 char *cp, *sp;
138 int pos, len, killed = 0;
140 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
141 sp = strchr(cp, '/');
142 if (!sp) {
143 /* If ent->name is prefix of an entry in the
144 * cache, it will be killed.
146 pos = cache_name_pos(ent->name, ent->len);
147 if (0 <= pos)
148 die("bug in show-killed-files");
149 pos = -pos - 1;
150 while (pos < active_nr &&
151 ce_stage(active_cache[pos]))
152 pos++; /* skip unmerged */
153 if (active_nr <= pos)
154 break;
155 /* pos points at a name immediately after
156 * ent->name in the cache. Does it expect
157 * ent->name to be a directory?
159 len = ce_namelen(active_cache[pos]);
160 if ((ent->len < len) &&
161 !strncmp(active_cache[pos]->name,
162 ent->name, ent->len) &&
163 active_cache[pos]->name[ent->len] == '/')
164 killed = 1;
165 break;
167 if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
168 /* If any of the leading directories in
169 * ent->name is registered in the cache,
170 * ent->name will be killed.
172 killed = 1;
173 break;
176 if (killed)
177 show_dir_entry(tag_killed, dir->entries[i]);
181 static void show_ce_entry(const char *tag, struct cache_entry *ce)
183 int len = prefix_len;
184 int offset = prefix_offset;
186 if (len >= ce_namelen(ce))
187 die("git-ls-files: internal error - cache entry not superset of prefix");
189 if (pathspec && !match(pathspec, ps_matched, ce->name, len))
190 return;
192 if (tag && *tag && show_valid_bit &&
193 (ce->ce_flags & htons(CE_VALID))) {
194 static char alttag[4];
195 memcpy(alttag, tag, 3);
196 if (isalpha(tag[0]))
197 alttag[0] = tolower(tag[0]);
198 else if (tag[0] == '?')
199 alttag[0] = '!';
200 else {
201 alttag[0] = 'v';
202 alttag[1] = tag[0];
203 alttag[2] = ' ';
204 alttag[3] = 0;
206 tag = alttag;
209 if (!show_stage) {
210 fputs(tag, stdout);
211 write_name_quoted("", 0, ce->name + offset,
212 line_terminator, stdout);
213 putchar(line_terminator);
215 else {
216 printf("%s%06o %s %d\t",
217 tag,
218 ntohl(ce->ce_mode),
219 abbrev ? find_unique_abbrev(ce->sha1,abbrev)
220 : sha1_to_hex(ce->sha1),
221 ce_stage(ce));
222 write_name_quoted("", 0, ce->name + offset,
223 line_terminator, stdout);
224 putchar(line_terminator);
228 static void show_files(struct dir_struct *dir, const char *prefix)
230 int i;
232 /* For cached/deleted files we don't need to even do the readdir */
233 if (show_others || show_killed) {
234 const char *path = ".", *base = "";
235 int baselen = prefix_len;
237 if (baselen)
238 path = base = prefix;
239 read_directory(dir, path, base, baselen, pathspec);
240 if (show_others)
241 show_other_files(dir);
242 if (show_killed)
243 show_killed_files(dir);
245 if (show_cached | show_stage) {
246 for (i = 0; i < active_nr; i++) {
247 struct cache_entry *ce = active_cache[i];
248 if (excluded(dir, ce->name) != dir->show_ignored)
249 continue;
250 if (show_unmerged && !ce_stage(ce))
251 continue;
252 if (ce->ce_flags & htons(CE_UPDATE))
253 continue;
254 show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
257 if (show_deleted | show_modified) {
258 for (i = 0; i < active_nr; i++) {
259 struct cache_entry *ce = active_cache[i];
260 struct stat st;
261 int err;
262 if (excluded(dir, ce->name) != dir->show_ignored)
263 continue;
264 err = lstat(ce->name, &st);
265 if (show_deleted && err)
266 show_ce_entry(tag_removed, ce);
267 if (show_modified && ce_modified(ce, &st, 0))
268 show_ce_entry(tag_modified, ce);
274 * Prune the index to only contain stuff starting with "prefix"
276 static void prune_cache(const char *prefix)
278 int pos = cache_name_pos(prefix, prefix_len);
279 unsigned int first, last;
281 if (pos < 0)
282 pos = -pos-1;
283 active_cache += pos;
284 active_nr -= pos;
285 first = 0;
286 last = active_nr;
287 while (last > first) {
288 int next = (last + first) >> 1;
289 struct cache_entry *ce = active_cache[next];
290 if (!strncmp(ce->name, prefix, prefix_len)) {
291 first = next+1;
292 continue;
294 last = next;
296 active_nr = last;
299 static const char *verify_pathspec(const char *prefix)
301 const char **p, *n, *prev;
302 char *real_prefix;
303 unsigned long max;
305 prev = NULL;
306 max = PATH_MAX;
307 for (p = pathspec; (n = *p) != NULL; p++) {
308 int i, len = 0;
309 for (i = 0; i < max; i++) {
310 char c = n[i];
311 if (prev && prev[i] != c)
312 break;
313 if (!c || c == '*' || c == '?')
314 break;
315 if (c == '/')
316 len = i+1;
318 prev = n;
319 if (len < max) {
320 max = len;
321 if (!max)
322 break;
326 if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
327 die("git-ls-files: cannot generate relative filenames containing '..'");
329 real_prefix = NULL;
330 prefix_len = max;
331 if (max) {
332 real_prefix = xmalloc(max + 1);
333 memcpy(real_prefix, prev, max);
334 real_prefix[max] = 0;
336 return real_prefix;
340 * Read the tree specified with --with-tree option
341 * (typically, HEAD) into stage #1 and then
342 * squash them down to stage #0. This is used for
343 * --error-unmatch to list and check the path patterns
344 * that were given from the command line. We are not
345 * going to write this index out.
347 static void overlay_tree(const char *tree_name, const char *prefix)
349 struct tree *tree;
350 unsigned char sha1[20];
351 const char **match;
352 struct cache_entry *last_stage0 = NULL;
353 int i;
355 if (get_sha1(tree_name, sha1))
356 die("tree-ish %s not found.", tree_name);
357 tree = parse_tree_indirect(sha1);
358 if (!tree)
359 die("bad tree-ish %s", tree_name);
361 /* Hoist the unmerged entries up to stage #3 to make room */
362 for (i = 0; i < active_nr; i++) {
363 struct cache_entry *ce = active_cache[i];
364 if (!ce_stage(ce))
365 continue;
366 ce->ce_flags |= htons(CE_STAGEMASK);
369 if (prefix) {
370 static const char *(matchbuf[2]);
371 matchbuf[0] = prefix;
372 matchbuf [1] = NULL;
373 match = matchbuf;
374 } else
375 match = NULL;
376 if (read_tree(tree, 1, match))
377 die("unable to read tree entries %s", tree_name);
379 for (i = 0; i < active_nr; i++) {
380 struct cache_entry *ce = active_cache[i];
381 switch (ce_stage(ce)) {
382 case 0:
383 last_stage0 = ce;
384 /* fallthru */
385 default:
386 continue;
387 case 1:
389 * If there is stage #0 entry for this, we do not
390 * need to show it. We use CE_UPDATE bit to mark
391 * such an entry.
393 if (last_stage0 &&
394 !strcmp(last_stage0->name, ce->name))
395 ce->ce_flags |= htons(CE_UPDATE);
400 static const char ls_files_usage[] =
401 "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
402 "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
403 "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
404 "[--] [<file>]*";
406 int cmd_ls_files(int argc, const char **argv, const char *prefix)
408 int i;
409 int exc_given = 0, require_work_tree = 0;
410 struct dir_struct dir;
412 memset(&dir, 0, sizeof(dir));
413 if (prefix)
414 prefix_offset = strlen(prefix);
415 git_config(git_default_config);
417 for (i = 1; i < argc; i++) {
418 const char *arg = argv[i];
420 if (!strcmp(arg, "--")) {
421 i++;
422 break;
424 if (!strcmp(arg, "-z")) {
425 line_terminator = 0;
426 continue;
428 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
429 tag_cached = "H ";
430 tag_unmerged = "M ";
431 tag_removed = "R ";
432 tag_modified = "C ";
433 tag_other = "? ";
434 tag_killed = "K ";
435 if (arg[1] == 'v')
436 show_valid_bit = 1;
437 continue;
439 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
440 show_cached = 1;
441 continue;
443 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
444 show_deleted = 1;
445 continue;
447 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
448 show_modified = 1;
449 require_work_tree = 1;
450 continue;
452 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
453 show_others = 1;
454 require_work_tree = 1;
455 continue;
457 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
458 dir.show_ignored = 1;
459 require_work_tree = 1;
460 continue;
462 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
463 show_stage = 1;
464 continue;
466 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
467 show_killed = 1;
468 require_work_tree = 1;
469 continue;
471 if (!strcmp(arg, "--directory")) {
472 dir.show_other_directories = 1;
473 continue;
475 if (!strcmp(arg, "--no-empty-directory")) {
476 dir.hide_empty_directories = 1;
477 continue;
479 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
480 /* There's no point in showing unmerged unless
481 * you also show the stage information.
483 show_stage = 1;
484 show_unmerged = 1;
485 continue;
487 if (!strcmp(arg, "-x") && i+1 < argc) {
488 exc_given = 1;
489 add_exclude(argv[++i], "", 0, &dir.exclude_list[EXC_CMDL]);
490 continue;
492 if (!prefixcmp(arg, "--exclude=")) {
493 exc_given = 1;
494 add_exclude(arg+10, "", 0, &dir.exclude_list[EXC_CMDL]);
495 continue;
497 if (!strcmp(arg, "-X") && i+1 < argc) {
498 exc_given = 1;
499 add_excludes_from_file(&dir, argv[++i]);
500 continue;
502 if (!prefixcmp(arg, "--exclude-from=")) {
503 exc_given = 1;
504 add_excludes_from_file(&dir, arg+15);
505 continue;
507 if (!prefixcmp(arg, "--exclude-per-directory=")) {
508 exc_given = 1;
509 dir.exclude_per_dir = arg + 24;
510 continue;
512 if (!strcmp(arg, "--full-name")) {
513 prefix_offset = 0;
514 continue;
516 if (!strcmp(arg, "--error-unmatch")) {
517 error_unmatch = 1;
518 continue;
520 if (!prefixcmp(arg, "--with-tree=")) {
521 with_tree = arg + 12;
522 continue;
524 if (!prefixcmp(arg, "--abbrev=")) {
525 abbrev = strtoul(arg+9, NULL, 10);
526 if (abbrev && abbrev < MINIMUM_ABBREV)
527 abbrev = MINIMUM_ABBREV;
528 else if (abbrev > 40)
529 abbrev = 40;
530 continue;
532 if (!strcmp(arg, "--abbrev")) {
533 abbrev = DEFAULT_ABBREV;
534 continue;
536 if (*arg == '-')
537 usage(ls_files_usage);
538 break;
541 if (require_work_tree && !is_inside_work_tree()) {
542 const char *work_tree = get_git_work_tree();
543 if (!work_tree || chdir(work_tree))
544 die("This operation must be run in a work tree");
547 pathspec = get_pathspec(prefix, argv + i);
549 /* Verify that the pathspec matches the prefix */
550 if (pathspec)
551 prefix = verify_pathspec(prefix);
553 /* Treat unmatching pathspec elements as errors */
554 if (pathspec && error_unmatch) {
555 int num;
556 for (num = 0; pathspec[num]; num++)
558 ps_matched = xcalloc(1, num);
561 if (dir.show_ignored && !exc_given) {
562 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
563 argv[0]);
564 exit(1);
567 /* With no flags, we default to showing the cached files */
568 if (!(show_stage | show_deleted | show_others | show_unmerged |
569 show_killed | show_modified))
570 show_cached = 1;
572 read_cache();
573 if (prefix)
574 prune_cache(prefix);
575 if (with_tree) {
577 * Basic sanity check; show-stages and show-unmerged
578 * would not make any sense with this option.
580 if (show_stage || show_unmerged)
581 die("ls-files --with-tree is incompatible with -s or -u");
582 overlay_tree(with_tree, prefix);
584 show_files(&dir, prefix);
586 if (ps_matched) {
587 /* We need to make sure all pathspec matched otherwise
588 * it is an error.
590 int num, errors = 0;
591 for (num = 0; pathspec[num]; num++) {
592 int other, found_dup;
594 if (ps_matched[num])
595 continue;
597 * The caller might have fed identical pathspec
598 * twice. Do not barf on such a mistake.
600 for (found_dup = other = 0;
601 !found_dup && pathspec[other];
602 other++) {
603 if (other == num || !ps_matched[other])
604 continue;
605 if (!strcmp(pathspec[other], pathspec[num]))
607 * Ok, we have a match already.
609 found_dup = 1;
611 if (found_dup)
612 continue;
614 error("pathspec '%s' did not match any file(s) known to git.",
615 pathspec[num] + prefix_offset);
616 errors++;
619 if (errors)
620 fprintf(stderr, "Did you forget to 'git add'?\n");
622 return errors ? 1 : 0;
625 return 0;