summaryrefslogtreecommitdiff
path: root/builtin/ls-files.c
blob: 625f48f0d6178f9078f887a2941e4d8c2a9efe30 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
/*
 * This merges the file listing in the directory cache index
 * with the actual working directory list, and shows different
 * combinations of the two.
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include "cache.h"
#include "repository.h"
#include "config.h"
#include "convert.h"
#include "quote.h"
#include "dir.h"
#include "builtin.h"
#include "gettext.h"
#include "object-name.h"
#include "strbuf.h"
#include "tree.h"
#include "cache-tree.h"
#include "parse-options.h"
#include "resolve-undo.h"
#include "string-list.h"
#include "pathspec.h"
#include "run-command.h"
#include "setup.h"
#include "submodule.h"
#include "submodule-config.h"

static int abbrev;
static int show_deleted;
static int show_cached;
static int show_others;
static int show_stage;
static int show_unmerged;
static int show_resolve_undo;
static int show_modified;
static int show_killed;
static int show_valid_bit;
static int show_fsmonitor_bit;
static int line_terminator = '\n';
static int debug_mode;
static int show_eol;
static int recurse_submodules;
static int skipping_duplicates;
static int show_sparse_dirs;

static const char *prefix;
static int max_prefix_len;
static int prefix_len;
static struct pathspec pathspec;
static int error_unmatch;
static char *ps_matched;
static const char *with_tree;
static int exc_given;
static int exclude_args;
static const char *format;

static const char *tag_cached = "";
static const char *tag_unmerged = "";
static const char *tag_removed = "";
static const char *tag_other = "";
static const char *tag_killed = "";
static const char *tag_modified = "";
static const char *tag_skip_worktree = "";
static const char *tag_resolve_undo = "";

static void write_eolinfo(struct index_state *istate,
			  const struct cache_entry *ce, const char *path)
{
	if (show_eol) {
		struct stat st;
		const char *i_txt = "";
		const char *w_txt = "";
		const char *a_txt = get_convert_attr_ascii(istate, path);
		if (ce && S_ISREG(ce->ce_mode))
			i_txt = get_cached_convert_stats_ascii(istate,
							       ce->name);
		if (!lstat(path, &st) && S_ISREG(st.st_mode))
			w_txt = get_wt_convert_stats_ascii(path);
		printf("i/%-5s w/%-5s attr/%-17s\t", i_txt, w_txt, a_txt);
	}
}

static void write_name(const char *name)
{
	/*
	 * With "--full-name", prefix_len=0; this caller needs to pass
	 * an empty string in that case (a NULL is good for "").
	 */
	write_name_quoted_relative(name, prefix_len ? prefix : NULL,
				   stdout, line_terminator);
}

static void write_name_to_buf(struct strbuf *sb, const char *name)
{
	struct strbuf buf = STRBUF_INIT;
	const char *rel = relative_path(name, prefix_len ? prefix : NULL, &buf);

	if (line_terminator)
		quote_c_style(rel, sb, NULL, 0);
	else
		strbuf_addstr(sb, rel);

	strbuf_release(&buf);
}

static const char *get_tag(const struct cache_entry *ce, const char *tag)
{
	static char alttag[4];

	if (tag && *tag && ((show_valid_bit && (ce->ce_flags & CE_VALID)) ||
		(show_fsmonitor_bit && (ce->ce_flags & CE_FSMONITOR_VALID)))) {
		memcpy(alttag, tag, 3);

		if (isalpha(tag[0])) {
			alttag[0] = tolower(tag[0]);
		} else if (tag[0] == '?') {
			alttag[0] = '!';
		} else {
			alttag[0] = 'v';
			alttag[1] = tag[0];
			alttag[2] = ' ';
			alttag[3] = 0;
		}

		tag = alttag;
	}

	return tag;
}

static void print_debug(const struct cache_entry *ce)
{
	if (debug_mode) {
		const struct stat_data *sd = &ce->ce_stat_data;

		printf("  ctime: %u:%u\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
		printf("  mtime: %u:%u\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
		printf("  dev: %u\tino: %u\n", sd->sd_dev, sd->sd_ino);
		printf("  uid: %u\tgid: %u\n", sd->sd_uid, sd->sd_gid);
		printf("  size: %u\tflags: %x\n", sd->sd_size, ce->ce_flags);
	}
}

static void show_dir_entry(struct index_state *istate,
			   const char *tag, struct dir_entry *ent)
{
	int len = max_prefix_len;

	if (len > ent->len)
		die("git ls-files: internal error - directory entry not superset of prefix");

	/* If ps_matches is non-NULL, figure out which pathspec(s) match. */
	if (ps_matched)
		dir_path_match(istate, ent, &pathspec, len, ps_matched);

	fputs(tag, stdout);
	write_eolinfo(istate, NULL, ent->name);
	write_name(ent->name);
}

static void show_other_files(struct index_state *istate,
			     const struct dir_struct *dir)
{
	int i;

	for (i = 0; i < dir->nr; i++) {
		struct dir_entry *ent = dir->entries[i];
		if (!index_name_is_other(istate, ent->name, ent->len))
			continue;
		show_dir_entry(istate, tag_other, ent);
	}
}

static void show_killed_files(struct index_state *istate,
			      const struct dir_struct *dir)
{
	int i;
	for (i = 0; i < dir->nr; i++) {
		struct dir_entry *ent = dir->entries[i];
		char *cp, *sp;
		int pos, len, killed = 0;

		for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
			sp = strchr(cp, '/');
			if (!sp) {
				/* If ent->name is prefix of an entry in the
				 * cache, it will be killed.
				 */
				pos = index_name_pos(istate, ent->name, ent->len);
				if (0 <= pos)
					BUG("killed-file %.*s not found",
						ent->len, ent->name);
				pos = -pos - 1;
				while (pos < istate->cache_nr &&
				       ce_stage(istate->cache[pos]))
					pos++; /* skip unmerged */
				if (istate->cache_nr <= pos)
					break;
				/* pos points at a name immediately after
				 * ent->name in the cache.  Does it expect
				 * ent->name to be a directory?
				 */
				len = ce_namelen(istate->cache[pos]);
				if ((ent->len < len) &&
				    !strncmp(istate->cache[pos]->name,
					     ent->name, ent->len) &&
				    istate->cache[pos]->name[ent->len] == '/')
					killed = 1;
				break;
			}
			if (0 <= index_name_pos(istate, ent->name, sp - ent->name)) {
				/* If any of the leading directories in
				 * ent->name is registered in the cache,
				 * ent->name will be killed.
				 */
				killed = 1;
				break;
			}
		}
		if (killed)
			show_dir_entry(istate, tag_killed, dir->entries[i]);
	}
}

static void show_files(struct repository *repo, struct dir_struct *dir);

static void show_submodule(struct repository *superproject,
			   struct dir_struct *dir, const char *path)
{
	struct repository subrepo;

	if (repo_submodule_init(&subrepo, superproject, path, null_oid()))
		return;

	if (repo_read_index(&subrepo) < 0)
		die("index file corrupt");

	show_files(&subrepo, dir);

	repo_clear(&subrepo);
}

struct show_index_data {
	const char *pathname;
	struct index_state *istate;
	const struct cache_entry *ce;
};

static size_t expand_show_index(struct strbuf *sb, const char *start,
				void *context)
{
	struct show_index_data *data = context;
	const char *end;
	const char *p;
	size_t len = strbuf_expand_literal_cb(sb, start, NULL);
	struct stat st;

	if (len)
		return len;
	if (*start != '(')
		die(_("bad ls-files format: element '%s' "
		      "does not start with '('"), start);

	end = strchr(start + 1, ')');
	if (!end)
		die(_("bad ls-files format: element '%s' "
		      "does not end in ')'"), start);

	len = end - start + 1;
	if (skip_prefix(start, "(objectmode)", &p))
		strbuf_addf(sb, "%06o", data->ce->ce_mode);
	else if (skip_prefix(start, "(objectname)", &p))
		strbuf_add_unique_abbrev(sb, &data->ce->oid, abbrev);
	else if (skip_prefix(start, "(stage)", &p))
		strbuf_addf(sb, "%d", ce_stage(data->ce));
	else if (skip_prefix(start, "(eolinfo:index)", &p))
		strbuf_addstr(sb, S_ISREG(data->ce->ce_mode) ?
			      get_cached_convert_stats_ascii(data->istate,
			      data->ce->name) : "");
	else if (skip_prefix(start, "(eolinfo:worktree)", &p))
		strbuf_addstr(sb, !lstat(data->pathname, &st) &&
			      S_ISREG(st.st_mode) ?
			      get_wt_convert_stats_ascii(data->pathname) : "");
	else if (skip_prefix(start, "(eolattr)", &p))
		strbuf_addstr(sb, get_convert_attr_ascii(data->istate,
			      data->pathname));
	else if (skip_prefix(start, "(path)", &p))
		write_name_to_buf(sb, data->pathname);
	else
		die(_("bad ls-files format: %%%.*s"), (int)len, start);

	return len;
}

static void show_ce_fmt(struct repository *repo, const struct cache_entry *ce,
			const char *format, const char *fullname) {
	struct show_index_data data = {
		.pathname = fullname,
		.istate = repo->index,
		.ce = ce,
	};
	struct strbuf sb = STRBUF_INIT;

	strbuf_expand(&sb, format, expand_show_index, &data);
	strbuf_addch(&sb, line_terminator);
	fwrite(sb.buf, sb.len, 1, stdout);
	strbuf_release(&sb);
}

static void show_ce(struct repository *repo, struct dir_struct *dir,
		    const struct cache_entry *ce, const char *fullname,
		    const char *tag)
{
	if (max_prefix_len > strlen(fullname))
		die("git ls-files: internal error - cache entry not superset of prefix");

	if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
	    is_submodule_active(repo, ce->name)) {
		show_submodule(repo, dir, ce->name);
	} else if (match_pathspec(repo->index, &pathspec, fullname, strlen(fullname),
				  max_prefix_len, ps_matched,
				  S_ISDIR(ce->ce_mode) ||
				  S_ISGITLINK(ce->ce_mode))) {
		if (format) {
			show_ce_fmt(repo, ce, format, fullname);
			print_debug(ce);
			return;
		}

		tag = get_tag(ce, tag);

		if (!show_stage) {
			fputs(tag, stdout);
		} else {
			printf("%s%06o %s %d\t",
			       tag,
			       ce->ce_mode,
			       repo_find_unique_abbrev(repo, &ce->oid, abbrev),
			       ce_stage(ce));
		}
		write_eolinfo(repo->index, ce, fullname);
		write_name(fullname);
		print_debug(ce);
	}
}

static void show_ru_info(struct index_state *istate)
{
	struct string_list_item *item;

	if (!istate->resolve_undo)
		return;

	for_each_string_list_item(item, istate->resolve_undo) {
		const char *path = item->string;
		struct resolve_undo_info *ui = item->util;
		int i, len;

		len = strlen(path);
		if (len < max_prefix_len)
			continue; /* outside of the prefix */
		if (!match_pathspec(istate, &pathspec, path, len,
				    max_prefix_len, ps_matched, 0))
			continue; /* uninterested */
		for (i = 0; i < 3; i++) {
			if (!ui->mode[i])
				continue;
			printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
			       repo_find_unique_abbrev(the_repository, &ui->oid[i], abbrev),
			       i + 1);
			write_name(path);
		}
	}
}

static int ce_excluded(struct dir_struct *dir, struct index_state *istate,
		       const char *fullname, const struct cache_entry *ce)
{
	int dtype = ce_to_dtype(ce);
	return is_excluded(dir, istate, fullname, &dtype);
}

static void construct_fullname(struct strbuf *out, const struct repository *repo,
			       const struct cache_entry *ce)
{
	strbuf_reset(out);
	if (repo->submodule_prefix)
		strbuf_addstr(out, repo->submodule_prefix);
	strbuf_addstr(out, ce->name);
}

static void show_files(struct repository *repo, struct dir_struct *dir)
{
	int i;
	struct strbuf fullname = STRBUF_INIT;

	/* For cached/deleted files we don't need to even do the readdir */
	if (show_others || show_killed) {
		if (!show_others)
			dir->flags |= DIR_COLLECT_KILLED_ONLY;
		fill_directory(dir, repo->index, &pathspec);
		if (show_others)
			show_other_files(repo->index, dir);
		if (show_killed)
			show_killed_files(repo->index, dir);
	}

	if (!(show_cached || show_stage || show_deleted || show_modified))
		return;

	if (!show_sparse_dirs)
		ensure_full_index(repo->index);

	for (i = 0; i < repo->index->cache_nr; i++) {
		const struct cache_entry *ce = repo->index->cache[i];
		struct stat st;
		int stat_err;

		construct_fullname(&fullname, repo, ce);

		if ((dir->flags & DIR_SHOW_IGNORED) &&
			!ce_excluded(dir, repo->index, fullname.buf, ce))
			continue;
		if (ce->ce_flags & CE_UPDATE)
			continue;
		if ((show_cached || show_stage) &&
		    (!show_unmerged || ce_stage(ce))) {
			show_ce(repo, dir, ce, fullname.buf,
				ce_stage(ce) ? tag_unmerged :
				(ce_skip_worktree(ce) ? tag_skip_worktree :
				 tag_cached));
			if (skipping_duplicates)
				goto skip_to_next_name;
		}

		if (!(show_deleted || show_modified))
			continue;
		if (ce_skip_worktree(ce))
			continue;
		stat_err = lstat(fullname.buf, &st);
		if (stat_err && (errno != ENOENT && errno != ENOTDIR))
			error_errno("cannot lstat '%s'", fullname.buf);
		if (stat_err && show_deleted) {
			show_ce(repo, dir, ce, fullname.buf, tag_removed);
			if (skipping_duplicates)
				goto skip_to_next_name;
		}
		if (show_modified &&
		    (stat_err || ie_modified(repo->index, ce, &st, 0))) {
			show_ce(repo, dir, ce, fullname.buf, tag_modified);
			if (skipping_duplicates)
				goto skip_to_next_name;
		}
		continue;

skip_to_next_name:
		{
			int j;
			struct cache_entry **cache = repo->index->cache;
			for (j = i + 1; j < repo->index->cache_nr; j++)
				if (strcmp(ce->name, cache[j]->name))
					break;
			i = j - 1; /* compensate for the for loop */
		}
	}

	strbuf_release(&fullname);
}

/*
 * Prune the index to only contain stuff starting with "prefix"
 */
static void prune_index(struct index_state *istate,
			const char *prefix, size_t prefixlen)
{
	int pos;
	unsigned int first, last;

	if (!prefix || !istate->cache_nr)
		return;
	pos = index_name_pos(istate, prefix, prefixlen);
	if (pos < 0)
		pos = -pos-1;
	first = pos;
	last = istate->cache_nr;
	while (last > first) {
		int next = first + ((last - first) >> 1);
		const struct cache_entry *ce = istate->cache[next];
		if (!strncmp(ce->name, prefix, prefixlen)) {
			first = next+1;
			continue;
		}
		last = next;
	}
	MOVE_ARRAY(istate->cache, istate->cache + pos, last - pos);
	istate->cache_nr = last - pos;
}

static int get_common_prefix_len(const char *common_prefix)
{
	int common_prefix_len;

	if (!common_prefix)
		return 0;

	common_prefix_len = strlen(common_prefix);

	/*
	 * If the prefix has a trailing slash, strip it so that submodules wont
	 * be pruned from the index.
	 */
	if (common_prefix[common_prefix_len - 1] == '/')
		common_prefix_len--;

	return common_prefix_len;
}

static int read_one_entry_opt(struct index_state *istate,
			      const struct object_id *oid,
			      struct strbuf *base,
			      const char *pathname,
			      unsigned mode, int opt)
{
	int len;
	struct cache_entry *ce;

	if (S_ISDIR(mode))
		return READ_TREE_RECURSIVE;

	len = strlen(pathname);
	ce = make_empty_cache_entry(istate, base->len + len);

	ce->ce_mode = create_ce_mode(mode);
	ce->ce_flags = create_ce_flags(1);
	ce->ce_namelen = base->len + len;
	memcpy(ce->name, base->buf, base->len);
	memcpy(ce->name + base->len, pathname, len+1);
	oidcpy(&ce->oid, oid);
	return add_index_entry(istate, ce, opt);
}

static int read_one_entry(const struct object_id *oid, struct strbuf *base,
			  const char *pathname, unsigned mode,
			  void *context)
{
	struct index_state *istate = context;
	return read_one_entry_opt(istate, oid, base, pathname,
				  mode,
				  ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
}

/*
 * This is used when the caller knows there is no existing entries at
 * the stage that will conflict with the entry being added.
 */
static int read_one_entry_quick(const struct object_id *oid, struct strbuf *base,
				const char *pathname, unsigned mode,
				void *context)
{
	struct index_state *istate = context;
	return read_one_entry_opt(istate, oid, base, pathname,
				  mode, ADD_CACHE_JUST_APPEND);
}

/*
 * Read the tree specified with --with-tree option
 * (typically, HEAD) into stage #1 and then
 * squash them down to stage #0.  This is used for
 * --error-unmatch to list and check the path patterns
 * that were given from the command line.  We are not
 * going to write this index out.
 */
void overlay_tree_on_index(struct index_state *istate,
			   const char *tree_name, const char *prefix)
{
	struct tree *tree;
	struct object_id oid;
	struct pathspec pathspec;
	struct cache_entry *last_stage0 = NULL;
	int i;
	read_tree_fn_t fn = NULL;
	int err;

	if (repo_get_oid(the_repository, tree_name, &oid))
		die("tree-ish %s not found.", tree_name);
	tree = parse_tree_indirect(&oid);
	if (!tree)
		die("bad tree-ish %s", tree_name);

	/* Hoist the unmerged entries up to stage #3 to make room */
	/* TODO: audit for interaction with sparse-index. */
	ensure_full_index(istate);
	for (i = 0; i < istate->cache_nr; i++) {
		struct cache_entry *ce = istate->cache[i];
		if (!ce_stage(ce))
			continue;
		ce->ce_flags |= CE_STAGEMASK;
	}

	if (prefix) {
		static const char *(matchbuf[1]);
		matchbuf[0] = NULL;
		parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
			       PATHSPEC_PREFER_CWD, prefix, matchbuf);
	} else
		memset(&pathspec, 0, sizeof(pathspec));

	/*
	 * See if we have cache entry at the stage.  If so,
	 * do it the original slow way, otherwise, append and then
	 * sort at the end.
	 */
	for (i = 0; !fn && i < istate->cache_nr; i++) {
		const struct cache_entry *ce = istate->cache[i];
		if (ce_stage(ce) == 1)
			fn = read_one_entry;
	}

	if (!fn)
		fn = read_one_entry_quick;
	err = read_tree(the_repository, tree, &pathspec, fn, istate);
	clear_pathspec(&pathspec);
	if (err)
		die("unable to read tree entries %s", tree_name);

	/*
	 * Sort the cache entry -- we need to nuke the cache tree, though.
	 */
	if (fn == read_one_entry_quick) {
		cache_tree_free(&istate->cache_tree);
		QSORT(istate->cache, istate->cache_nr, cmp_cache_name_compare);
	}

	for (i = 0; i < istate->cache_nr; i++) {
		struct cache_entry *ce = istate->cache[i];
		switch (ce_stage(ce)) {
		case 0:
			last_stage0 = ce;
			/* fallthru */
		default:
			continue;
		case 1:
			/*
			 * If there is stage #0 entry for this, we do not
			 * need to show it.  We use CE_UPDATE bit to mark
			 * such an entry.
			 */
			if (last_stage0 &&
			    !strcmp(last_stage0->name, ce->name))
				ce->ce_flags |= CE_UPDATE;
		}
	}
}

static const char * const ls_files_usage[] = {
	N_("git ls-files [<options>] [<file>...]"),
	NULL
};

static int option_parse_exclude(const struct option *opt,
				const char *arg, int unset)
{
	struct string_list *exclude_list = opt->value;

	BUG_ON_OPT_NEG(unset);

	exc_given = 1;
	string_list_append(exclude_list, arg);

	return 0;
}

static int option_parse_exclude_from(const struct option *opt,
				     const char *arg, int unset)
{
	struct dir_struct *dir = opt->value;

	BUG_ON_OPT_NEG(unset);

	exc_given = 1;
	add_patterns_from_file(dir, arg);

	return 0;
}

static int option_parse_exclude_standard(const struct option *opt,
					 const char *arg, int unset)
{
	struct dir_struct *dir = opt->value;

	BUG_ON_OPT_NEG(unset);
	BUG_ON_OPT_ARG(arg);

	exc_given = 1;
	setup_standard_excludes(dir);

	return 0;
}

int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
{
	int require_work_tree = 0, show_tag = 0, i;
	char *max_prefix;
	struct dir_struct dir = DIR_INIT;
	struct pattern_list *pl;
	struct string_list exclude_list = STRING_LIST_INIT_NODUP;
	struct option builtin_ls_files_options[] = {
		/* Think twice before adding "--nul" synonym to this */
		OPT_SET_INT('z', NULL, &line_terminator,
			N_("separate paths with the NUL character"), '\0'),
		OPT_BOOL('t', NULL, &show_tag,
			N_("identify the file status with tags")),
		OPT_BOOL('v', NULL, &show_valid_bit,
			N_("use lowercase letters for 'assume unchanged' files")),
		OPT_BOOL('f', NULL, &show_fsmonitor_bit,
			N_("use lowercase letters for 'fsmonitor clean' files")),
		OPT_BOOL('c', "cached", &show_cached,
			N_("show cached files in the output (default)")),
		OPT_BOOL('d', "deleted", &show_deleted,
			N_("show deleted files in the output")),
		OPT_BOOL('m', "modified", &show_modified,
			N_("show modified files in the output")),
		OPT_BOOL('o', "others", &show_others,
			N_("show other files in the output")),
		OPT_BIT('i', "ignored", &dir.flags,
			N_("show ignored files in the output"),
			DIR_SHOW_IGNORED),
		OPT_BOOL('s', "stage", &show_stage,
			N_("show staged contents' object name in the output")),
		OPT_BOOL('k', "killed", &show_killed,
			N_("show files on the filesystem that need to be removed")),
		OPT_BIT(0, "directory", &dir.flags,
			N_("show 'other' directories' names only"),
			DIR_SHOW_OTHER_DIRECTORIES),
		OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
		OPT_NEGBIT(0, "empty-directory", &dir.flags,
			N_("don't show empty directories"),
			DIR_HIDE_EMPTY_DIRECTORIES),
		OPT_BOOL('u', "unmerged", &show_unmerged,
			N_("show unmerged files in the output")),
		OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
			    N_("show resolve-undo information")),
		OPT_CALLBACK_F('x', "exclude", &exclude_list, N_("pattern"),
			N_("skip files matching pattern"),
			PARSE_OPT_NONEG, option_parse_exclude),
		OPT_CALLBACK_F('X', "exclude-from", &dir, N_("file"),
			N_("read exclude patterns from <file>"),
			PARSE_OPT_NONEG, option_parse_exclude_from),
		OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
			N_("read additional per-directory exclude patterns in <file>")),
		OPT_CALLBACK_F(0, "exclude-standard", &dir, NULL,
			N_("add the standard git exclusions"),
			PARSE_OPT_NOARG | PARSE_OPT_NONEG,
			option_parse_exclude_standard),
		OPT_SET_INT_F(0, "full-name", &prefix_len,
			      N_("make the output relative to the project top directory"),
			      0, PARSE_OPT_NONEG),
		OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
			N_("recurse through submodules")),
		OPT_BOOL(0, "error-unmatch", &error_unmatch,
			N_("if any <file> is not in the index, treat this as an error")),
		OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
			N_("pretend that paths removed since <tree-ish> are still present")),
		OPT__ABBREV(&abbrev),
		OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
		OPT_BOOL(0, "deduplicate", &skipping_duplicates,
			 N_("suppress duplicate entries")),
		OPT_BOOL(0, "sparse", &show_sparse_dirs,
			 N_("show sparse directories in the presence of a sparse index")),
		OPT_STRING_F(0, "format", &format, N_("format"),
			     N_("format to use for the output"),
			     PARSE_OPT_NONEG),
		OPT_END()
	};
	int ret = 0;

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(ls_files_usage, builtin_ls_files_options);

	prepare_repo_settings(the_repository);
	the_repository->settings.command_requires_full_index = 0;

	prefix = cmd_prefix;
	if (prefix)
		prefix_len = strlen(prefix);
	git_config(git_default_config, NULL);

	if (repo_read_index(the_repository) < 0)
		die("index file corrupt");

	argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
			ls_files_usage, 0);
	pl = add_pattern_list(&dir, EXC_CMDL, "--exclude option");
	for (i = 0; i < exclude_list.nr; i++) {
		add_pattern(exclude_list.items[i].string, "", 0, pl, --exclude_args);
	}

	if (format && (show_stage || show_others || show_killed ||
		show_resolve_undo || skipping_duplicates || show_eol || show_tag))
			usage_msg_opt(_("--format cannot be used with -s, -o, -k, -t, "
				      "--resolve-undo, --deduplicate, --eol"),
				      ls_files_usage, builtin_ls_files_options);

	if (show_tag || show_valid_bit || show_fsmonitor_bit) {
		tag_cached = "H ";
		tag_unmerged = "M ";
		tag_removed = "R ";
		tag_modified = "C ";
		tag_other = "? ";
		tag_killed = "K ";
		tag_skip_worktree = "S ";
		tag_resolve_undo = "U ";
	}
	if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
		require_work_tree = 1;
	if (show_unmerged)
		/*
		 * There's no point in showing unmerged unless
		 * you also show the stage information.
		 */
		show_stage = 1;
	if (show_tag || show_stage)
		skipping_duplicates = 0;
	if (dir.exclude_per_dir)
		exc_given = 1;

	if (require_work_tree && !is_inside_work_tree())
		setup_work_tree();

	if (recurse_submodules &&
	    (show_deleted || show_others || show_unmerged ||
	     show_killed || show_modified || show_resolve_undo || with_tree))
		die("ls-files --recurse-submodules unsupported mode");

	if (recurse_submodules && error_unmatch)
		die("ls-files --recurse-submodules does not support "
		    "--error-unmatch");

	parse_pathspec(&pathspec, 0,
		       PATHSPEC_PREFER_CWD,
		       prefix, argv);

	/*
	 * Find common prefix for all pathspec's
	 * This is used as a performance optimization which unfortunately cannot
	 * be done when recursing into submodules because when a pathspec is
	 * given which spans repository boundaries you can't simply remove the
	 * submodule entry because the pathspec may match something inside the
	 * submodule.
	 */
	if (recurse_submodules)
		max_prefix = NULL;
	else
		max_prefix = common_prefix(&pathspec);
	max_prefix_len = get_common_prefix_len(max_prefix);

	prune_index(the_repository->index, max_prefix, max_prefix_len);

	/* Treat unmatching pathspec elements as errors */
	if (pathspec.nr && error_unmatch)
		ps_matched = xcalloc(pathspec.nr, 1);

	if ((dir.flags & DIR_SHOW_IGNORED) && !show_others && !show_cached)
		die("ls-files -i must be used with either -o or -c");

	if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
		die("ls-files --ignored needs some exclude pattern");

	/* With no flags, we default to showing the cached files */
	if (!(show_stage || show_deleted || show_others || show_unmerged ||
	      show_killed || show_modified || show_resolve_undo))
		show_cached = 1;

	if (with_tree) {
		/*
		 * Basic sanity check; show-stages and show-unmerged
		 * would not make any sense with this option.
		 */
		if (show_stage || show_unmerged)
			die(_("options '%s' and '%s' cannot be used together"), "ls-files --with-tree", "-s/-u");
		overlay_tree_on_index(the_repository->index, with_tree, max_prefix);
	}

	show_files(the_repository, &dir);

	if (show_resolve_undo)
		show_ru_info(the_repository->index);

	if (ps_matched && report_path_error(ps_matched, &pathspec)) {
		fprintf(stderr, "Did you forget to 'git add'?\n");
		ret = 1;
	}

	string_list_clear(&exclude_list, 0);
	dir_clear(&dir);
	free(max_prefix);
	return ret;
}