convert common_prefix() to use struct pathspec
[git/git.git] / builtin / 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 "cache.h"
9 #include "quote.h"
10 #include "dir.h"
11 #include "builtin.h"
12 #include "tree.h"
13 #include "parse-options.h"
14 #include "resolve-undo.h"
15 #include "string-list.h"
16 #include "pathspec.h"
17
18 static int abbrev;
19 static int show_deleted;
20 static int show_cached;
21 static int show_others;
22 static int show_stage;
23 static int show_unmerged;
24 static int show_resolve_undo;
25 static int show_modified;
26 static int show_killed;
27 static int show_valid_bit;
28 static int line_terminator = '\n';
29 static int debug_mode;
30
31 static const char *prefix;
32 static int max_prefix_len;
33 static int prefix_len;
34 static struct pathspec pathspec;
35 static int error_unmatch;
36 static char *ps_matched;
37 static const char *with_tree;
38 static int exc_given;
39 static int exclude_args;
40
41 static const char *tag_cached = "";
42 static const char *tag_unmerged = "";
43 static const char *tag_removed = "";
44 static const char *tag_other = "";
45 static const char *tag_killed = "";
46 static const char *tag_modified = "";
47 static const char *tag_skip_worktree = "";
48 static const char *tag_resolve_undo = "";
49
50 static void write_name(const char* name, size_t len)
51 {
52 write_name_quoted_relative(name, len, prefix, prefix_len, stdout,
53 line_terminator);
54 }
55
56 static void show_dir_entry(const char *tag, struct dir_entry *ent)
57 {
58 int len = max_prefix_len;
59
60 if (len >= ent->len)
61 die("git ls-files: internal error - directory entry not superset of prefix");
62
63 if (!match_pathspec_depth(&pathspec, ent->name, ent->len, len, ps_matched))
64 return;
65
66 fputs(tag, stdout);
67 write_name(ent->name, ent->len);
68 }
69
70 static void show_other_files(struct dir_struct *dir)
71 {
72 int i;
73
74 for (i = 0; i < dir->nr; i++) {
75 struct dir_entry *ent = dir->entries[i];
76 if (!cache_name_is_other(ent->name, ent->len))
77 continue;
78 show_dir_entry(tag_other, ent);
79 }
80 }
81
82 static void show_killed_files(struct dir_struct *dir)
83 {
84 int i;
85 for (i = 0; i < dir->nr; i++) {
86 struct dir_entry *ent = dir->entries[i];
87 char *cp, *sp;
88 int pos, len, killed = 0;
89
90 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
91 sp = strchr(cp, '/');
92 if (!sp) {
93 /* If ent->name is prefix of an entry in the
94 * cache, it will be killed.
95 */
96 pos = cache_name_pos(ent->name, ent->len);
97 if (0 <= pos)
98 die("bug in show-killed-files");
99 pos = -pos - 1;
100 while (pos < active_nr &&
101 ce_stage(active_cache[pos]))
102 pos++; /* skip unmerged */
103 if (active_nr <= pos)
104 break;
105 /* pos points at a name immediately after
106 * ent->name in the cache. Does it expect
107 * ent->name to be a directory?
108 */
109 len = ce_namelen(active_cache[pos]);
110 if ((ent->len < len) &&
111 !strncmp(active_cache[pos]->name,
112 ent->name, ent->len) &&
113 active_cache[pos]->name[ent->len] == '/')
114 killed = 1;
115 break;
116 }
117 if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
118 /* If any of the leading directories in
119 * ent->name is registered in the cache,
120 * ent->name will be killed.
121 */
122 killed = 1;
123 break;
124 }
125 }
126 if (killed)
127 show_dir_entry(tag_killed, dir->entries[i]);
128 }
129 }
130
131 static void show_ce_entry(const char *tag, struct cache_entry *ce)
132 {
133 int len = max_prefix_len;
134
135 if (len >= ce_namelen(ce))
136 die("git ls-files: internal error - cache entry not superset of prefix");
137
138 if (!match_pathspec_depth(&pathspec, ce->name, ce_namelen(ce), len, ps_matched))
139 return;
140
141 if (tag && *tag && show_valid_bit &&
142 (ce->ce_flags & CE_VALID)) {
143 static char alttag[4];
144 memcpy(alttag, tag, 3);
145 if (isalpha(tag[0]))
146 alttag[0] = tolower(tag[0]);
147 else if (tag[0] == '?')
148 alttag[0] = '!';
149 else {
150 alttag[0] = 'v';
151 alttag[1] = tag[0];
152 alttag[2] = ' ';
153 alttag[3] = 0;
154 }
155 tag = alttag;
156 }
157
158 if (!show_stage) {
159 fputs(tag, stdout);
160 } else {
161 printf("%s%06o %s %d\t",
162 tag,
163 ce->ce_mode,
164 find_unique_abbrev(ce->sha1,abbrev),
165 ce_stage(ce));
166 }
167 write_name(ce->name, ce_namelen(ce));
168 if (debug_mode) {
169 struct stat_data *sd = &ce->ce_stat_data;
170
171 printf(" ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
172 printf(" mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
173 printf(" dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
174 printf(" uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
175 printf(" size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
176 }
177 }
178
179 static void show_ru_info(void)
180 {
181 struct string_list_item *item;
182
183 if (!the_index.resolve_undo)
184 return;
185
186 for_each_string_list_item(item, the_index.resolve_undo) {
187 const char *path = item->string;
188 struct resolve_undo_info *ui = item->util;
189 int i, len;
190
191 len = strlen(path);
192 if (len < max_prefix_len)
193 continue; /* outside of the prefix */
194 if (!match_pathspec_depth(&pathspec, path, len, max_prefix_len, ps_matched))
195 continue; /* uninterested */
196 for (i = 0; i < 3; i++) {
197 if (!ui->mode[i])
198 continue;
199 printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
200 find_unique_abbrev(ui->sha1[i], abbrev),
201 i + 1);
202 write_name(path, len);
203 }
204 }
205 }
206
207 static int ce_excluded(struct dir_struct *dir, struct cache_entry *ce)
208 {
209 int dtype = ce_to_dtype(ce);
210 return is_excluded(dir, ce->name, &dtype);
211 }
212
213 static void show_files(struct dir_struct *dir)
214 {
215 int i;
216
217 /* For cached/deleted files we don't need to even do the readdir */
218 if (show_others || show_killed) {
219 fill_directory(dir, &pathspec);
220 if (show_others)
221 show_other_files(dir);
222 if (show_killed)
223 show_killed_files(dir);
224 }
225 if (show_cached || show_stage) {
226 for (i = 0; i < active_nr; i++) {
227 struct cache_entry *ce = active_cache[i];
228 if ((dir->flags & DIR_SHOW_IGNORED) &&
229 !ce_excluded(dir, ce))
230 continue;
231 if (show_unmerged && !ce_stage(ce))
232 continue;
233 if (ce->ce_flags & CE_UPDATE)
234 continue;
235 show_ce_entry(ce_stage(ce) ? tag_unmerged :
236 (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
237 }
238 }
239 if (show_deleted || show_modified) {
240 for (i = 0; i < active_nr; i++) {
241 struct cache_entry *ce = active_cache[i];
242 struct stat st;
243 int err;
244 if ((dir->flags & DIR_SHOW_IGNORED) &&
245 !ce_excluded(dir, ce))
246 continue;
247 if (ce->ce_flags & CE_UPDATE)
248 continue;
249 if (ce_skip_worktree(ce))
250 continue;
251 err = lstat(ce->name, &st);
252 if (show_deleted && err)
253 show_ce_entry(tag_removed, ce);
254 if (show_modified && ce_modified(ce, &st, 0))
255 show_ce_entry(tag_modified, ce);
256 }
257 }
258 }
259
260 /*
261 * Prune the index to only contain stuff starting with "prefix"
262 */
263 static void prune_cache(const char *prefix)
264 {
265 int pos = cache_name_pos(prefix, max_prefix_len);
266 unsigned int first, last;
267
268 if (pos < 0)
269 pos = -pos-1;
270 memmove(active_cache, active_cache + pos,
271 (active_nr - pos) * sizeof(struct cache_entry *));
272 active_nr -= pos;
273 first = 0;
274 last = active_nr;
275 while (last > first) {
276 int next = (last + first) >> 1;
277 struct cache_entry *ce = active_cache[next];
278 if (!strncmp(ce->name, prefix, max_prefix_len)) {
279 first = next+1;
280 continue;
281 }
282 last = next;
283 }
284 active_nr = last;
285 }
286
287 /*
288 * Read the tree specified with --with-tree option
289 * (typically, HEAD) into stage #1 and then
290 * squash them down to stage #0. This is used for
291 * --error-unmatch to list and check the path patterns
292 * that were given from the command line. We are not
293 * going to write this index out.
294 */
295 void overlay_tree_on_cache(const char *tree_name, const char *prefix)
296 {
297 struct tree *tree;
298 unsigned char sha1[20];
299 struct pathspec pathspec;
300 struct cache_entry *last_stage0 = NULL;
301 int i;
302
303 if (get_sha1(tree_name, sha1))
304 die("tree-ish %s not found.", tree_name);
305 tree = parse_tree_indirect(sha1);
306 if (!tree)
307 die("bad tree-ish %s", tree_name);
308
309 /* Hoist the unmerged entries up to stage #3 to make room */
310 for (i = 0; i < active_nr; i++) {
311 struct cache_entry *ce = active_cache[i];
312 if (!ce_stage(ce))
313 continue;
314 ce->ce_flags |= CE_STAGEMASK;
315 }
316
317 if (prefix) {
318 static const char *(matchbuf[2]);
319 matchbuf[0] = prefix;
320 matchbuf[1] = NULL;
321 init_pathspec(&pathspec, matchbuf);
322 pathspec.items[0].nowildcard_len = pathspec.items[0].len;
323 } else
324 init_pathspec(&pathspec, NULL);
325 if (read_tree(tree, 1, &pathspec))
326 die("unable to read tree entries %s", tree_name);
327
328 for (i = 0; i < active_nr; i++) {
329 struct cache_entry *ce = active_cache[i];
330 switch (ce_stage(ce)) {
331 case 0:
332 last_stage0 = ce;
333 /* fallthru */
334 default:
335 continue;
336 case 1:
337 /*
338 * If there is stage #0 entry for this, we do not
339 * need to show it. We use CE_UPDATE bit to mark
340 * such an entry.
341 */
342 if (last_stage0 &&
343 !strcmp(last_stage0->name, ce->name))
344 ce->ce_flags |= CE_UPDATE;
345 }
346 }
347 }
348
349 int report_path_error(const char *ps_matched,
350 const struct pathspec *pathspec,
351 const char *prefix)
352 {
353 /*
354 * Make sure all pathspec matched; otherwise it is an error.
355 */
356 struct strbuf sb = STRBUF_INIT;
357 int num, errors = 0;
358 for (num = 0; num < pathspec->nr; num++) {
359 int other, found_dup;
360
361 if (ps_matched[num])
362 continue;
363 /*
364 * The caller might have fed identical pathspec
365 * twice. Do not barf on such a mistake.
366 * FIXME: parse_pathspec should have eliminated
367 * duplicate pathspec.
368 */
369 for (found_dup = other = 0;
370 !found_dup && other < pathspec->nr;
371 other++) {
372 if (other == num || !ps_matched[other])
373 continue;
374 if (!strcmp(pathspec->items[other].original,
375 pathspec->items[num].original))
376 /*
377 * Ok, we have a match already.
378 */
379 found_dup = 1;
380 }
381 if (found_dup)
382 continue;
383
384 error("pathspec '%s' did not match any file(s) known to git.",
385 pathspec->items[num].original);
386 errors++;
387 }
388 strbuf_release(&sb);
389 return errors;
390 }
391
392 static const char * const ls_files_usage[] = {
393 N_("git ls-files [options] [<file>...]"),
394 NULL
395 };
396
397 static int option_parse_z(const struct option *opt,
398 const char *arg, int unset)
399 {
400 line_terminator = unset ? '\n' : '\0';
401
402 return 0;
403 }
404
405 static int option_parse_exclude(const struct option *opt,
406 const char *arg, int unset)
407 {
408 struct string_list *exclude_list = opt->value;
409
410 exc_given = 1;
411 string_list_append(exclude_list, arg);
412
413 return 0;
414 }
415
416 static int option_parse_exclude_from(const struct option *opt,
417 const char *arg, int unset)
418 {
419 struct dir_struct *dir = opt->value;
420
421 exc_given = 1;
422 add_excludes_from_file(dir, arg);
423
424 return 0;
425 }
426
427 static int option_parse_exclude_standard(const struct option *opt,
428 const char *arg, int unset)
429 {
430 struct dir_struct *dir = opt->value;
431
432 exc_given = 1;
433 setup_standard_excludes(dir);
434
435 return 0;
436 }
437
438 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
439 {
440 int require_work_tree = 0, show_tag = 0, i;
441 const char *max_prefix;
442 struct dir_struct dir;
443 struct exclude_list *el;
444 struct string_list exclude_list = STRING_LIST_INIT_NODUP;
445 struct option builtin_ls_files_options[] = {
446 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
447 N_("paths are separated with NUL character"),
448 PARSE_OPT_NOARG, option_parse_z },
449 OPT_BOOLEAN('t', NULL, &show_tag,
450 N_("identify the file status with tags")),
451 OPT_BOOLEAN('v', NULL, &show_valid_bit,
452 N_("use lowercase letters for 'assume unchanged' files")),
453 OPT_BOOLEAN('c', "cached", &show_cached,
454 N_("show cached files in the output (default)")),
455 OPT_BOOLEAN('d', "deleted", &show_deleted,
456 N_("show deleted files in the output")),
457 OPT_BOOLEAN('m', "modified", &show_modified,
458 N_("show modified files in the output")),
459 OPT_BOOLEAN('o', "others", &show_others,
460 N_("show other files in the output")),
461 OPT_BIT('i', "ignored", &dir.flags,
462 N_("show ignored files in the output"),
463 DIR_SHOW_IGNORED),
464 OPT_BOOLEAN('s', "stage", &show_stage,
465 N_("show staged contents' object name in the output")),
466 OPT_BOOLEAN('k', "killed", &show_killed,
467 N_("show files on the filesystem that need to be removed")),
468 OPT_BIT(0, "directory", &dir.flags,
469 N_("show 'other' directories' name only"),
470 DIR_SHOW_OTHER_DIRECTORIES),
471 OPT_NEGBIT(0, "empty-directory", &dir.flags,
472 N_("don't show empty directories"),
473 DIR_HIDE_EMPTY_DIRECTORIES),
474 OPT_BOOLEAN('u', "unmerged", &show_unmerged,
475 N_("show unmerged files in the output")),
476 OPT_BOOLEAN(0, "resolve-undo", &show_resolve_undo,
477 N_("show resolve-undo information")),
478 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
479 N_("skip files matching pattern"),
480 0, option_parse_exclude },
481 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
482 N_("exclude patterns are read from <file>"),
483 0, option_parse_exclude_from },
484 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
485 N_("read additional per-directory exclude patterns in <file>")),
486 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
487 N_("add the standard git exclusions"),
488 PARSE_OPT_NOARG, option_parse_exclude_standard },
489 { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
490 N_("make the output relative to the project top directory"),
491 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
492 OPT_BOOLEAN(0, "error-unmatch", &error_unmatch,
493 N_("if any <file> is not in the index, treat this as an error")),
494 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
495 N_("pretend that paths removed since <tree-ish> are still present")),
496 OPT__ABBREV(&abbrev),
497 OPT_BOOLEAN(0, "debug", &debug_mode, N_("show debugging data")),
498 OPT_END()
499 };
500
501 if (argc == 2 && !strcmp(argv[1], "-h"))
502 usage_with_options(ls_files_usage, builtin_ls_files_options);
503
504 memset(&dir, 0, sizeof(dir));
505 prefix = cmd_prefix;
506 if (prefix)
507 prefix_len = strlen(prefix);
508 git_config(git_default_config, NULL);
509
510 if (read_cache() < 0)
511 die("index file corrupt");
512
513 argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
514 ls_files_usage, 0);
515 el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
516 for (i = 0; i < exclude_list.nr; i++) {
517 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
518 }
519 if (show_tag || show_valid_bit) {
520 tag_cached = "H ";
521 tag_unmerged = "M ";
522 tag_removed = "R ";
523 tag_modified = "C ";
524 tag_other = "? ";
525 tag_killed = "K ";
526 tag_skip_worktree = "S ";
527 tag_resolve_undo = "U ";
528 }
529 if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
530 require_work_tree = 1;
531 if (show_unmerged)
532 /*
533 * There's no point in showing unmerged unless
534 * you also show the stage information.
535 */
536 show_stage = 1;
537 if (dir.exclude_per_dir)
538 exc_given = 1;
539
540 if (require_work_tree && !is_inside_work_tree())
541 setup_work_tree();
542
543 parse_pathspec(&pathspec, 0,
544 PATHSPEC_PREFER_CWD |
545 PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
546 prefix, argv);
547
548 /* Find common prefix for all pathspec's */
549 max_prefix = common_prefix(&pathspec);
550 max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
551
552 /* Treat unmatching pathspec elements as errors */
553 if (pathspec.nr && error_unmatch)
554 ps_matched = xcalloc(1, pathspec.nr);
555
556 if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
557 die("ls-files --ignored needs some exclude pattern");
558
559 /* With no flags, we default to showing the cached files */
560 if (!(show_stage || show_deleted || show_others || show_unmerged ||
561 show_killed || show_modified || show_resolve_undo))
562 show_cached = 1;
563
564 if (max_prefix)
565 prune_cache(max_prefix);
566 if (with_tree) {
567 /*
568 * Basic sanity check; show-stages and show-unmerged
569 * would not make any sense with this option.
570 */
571 if (show_stage || show_unmerged)
572 die("ls-files --with-tree is incompatible with -s or -u");
573 overlay_tree_on_cache(with_tree, max_prefix);
574 }
575 show_files(&dir);
576 if (show_resolve_undo)
577 show_ru_info();
578
579 if (ps_matched) {
580 int bad;
581 bad = report_path_error(ps_matched, &pathspec, prefix);
582 if (bad)
583 fprintf(stderr, "Did you forget to 'git add'?\n");
584
585 return bad ? 1 : 0;
586 }
587
588 return 0;
589 }