summaryrefslogtreecommitdiff
path: root/pathspec.c
blob: 50f76fff458e45f57ae67c3474de8378f390f978 (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
#include "cache.h"
#include "dir.h"
#include "pathspec.h"
#include "attr.h"
 
/*
 * Finds which of the given pathspecs match items in the index.
 *
 * For each pathspec, sets the corresponding entry in the seen[] array
 * (which should be specs items long, i.e. the same size as pathspec)
 * to the nature of the "closest" (i.e. most specific) match found for
 * that pathspec in the index, if it was a closer type of match than
 * the existing entry.  As an optimization, matching is skipped
 * altogether if seen[] already only contains non-zero entries.
 *
 * If seen[] has not already been written to, it may make sense
 * to use find_pathspecs_matching_against_index() instead.
 */
void add_pathspec_matches_against_index(const struct pathspec *pathspec,
					char *seen)
{
	int num_unmatched = 0, i;
 
	/*
	 * Since we are walking the index as if we were walking the directory,
	 * we have to mark the matched pathspec as seen; otherwise we will
	 * mistakenly think that the user gave a pathspec that did not match
	 * anything.
	 */
	for (i = 0; i < pathspec->nr; i++)
		if (!seen[i])
			num_unmatched++;
	if (!num_unmatched)
		return;
	for (i = 0; i < active_nr; i++) {
		const struct cache_entry *ce = active_cache[i];
		ce_path_match(ce, pathspec, seen);
	}
}
 
/*
 * Finds which of the given pathspecs match items in the index.
 *
 * This is a one-shot wrapper around add_pathspec_matches_against_index()
 * which allocates, populates, and returns a seen[] array indicating the
 * nature of the "closest" (i.e. most specific) matches which each of the
 * given pathspecs achieves against all items in the index.
 */
char *find_pathspecs_matching_against_index(const struct pathspec *pathspec)
{
	char *seen = xcalloc(pathspec->nr, 1);
	add_pathspec_matches_against_index(pathspec, seen);
	return seen;
}
 
/*
 * Magic pathspec
 *
 * Possible future magic semantics include stuff like:
 *
 *	{ PATHSPEC_RECURSIVE, '*', "recursive" },
 *	{ PATHSPEC_REGEXP, '\0', "regexp" },
 *
 */
 
static struct pathspec_magic {
	unsigned bit;
	char mnemonic; /* this cannot be ':'! */
	const char *name;
} pathspec_magic[] = {
	{ PATHSPEC_FROMTOP,  '/', "top" },
	{ PATHSPEC_LITERAL, '\0', "literal" },
	{ PATHSPEC_GLOB,    '\0', "glob" },
	{ PATHSPEC_ICASE,   '\0', "icase" },
	{ PATHSPEC_EXCLUDE,  '!', "exclude" },
	{ PATHSPEC_ATTR,    '\0', "attr" },
};
 
static void prefix_magic(struct strbuf *sb, int prefixlen, unsigned magic)
{
	int i;
	strbuf_addstr(sb, ":(");
	for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
		if (magic & pathspec_magic[i].bit) {
			if (sb->buf[sb->len - 1] != '(')
				strbuf_addch(sb, ',');
			strbuf_addstr(sb, pathspec_magic[i].name);
		}
	strbuf_addf(sb, ",prefix:%d)", prefixlen);
}
 
static size_t strcspn_escaped(const char *s, const char *stop)
{
	const char *i;
 
	for (i = s; *i; i++) {
		/* skip the escaped character */
		if (i[0] == '\\' && i[1]) {
			i++;
			continue;
		}
 
		if (strchr(stop, *i))
			break;
	}
	return i - s;
}
 
static inline int invalid_value_char(const char ch)
{
	if (isalnum(ch) || strchr(",-_", ch))
		return 0;
	return -1;
}
 
static char *attr_value_unescape(const char *value)
{
	const char *src;
	char *dst, *ret;
 
	ret = xmallocz(strlen(value));
	for (src = value, dst = ret; *src; src++, dst++) {
		if (*src == '\\') {
			if (!src[1])
				die(_("Escape character '\\' not allowed as "
				      "last character in attr value"));
			src++;
		}
		if (invalid_value_char(*src))
			die("cannot use '%c' for value matching", *src);
		*dst = *src;
	}
	*dst = '\0';
	return ret;
}
 
static void parse_pathspec_attr_match(struct pathspec_item *item, const char *value)
{
	struct string_list_item *si;
	struct string_list list = STRING_LIST_INIT_DUP;
 
	if (item->attr_check || item->attr_match)
		die(_("Only one 'attr:' specification is allowed."));
 
	if (!value || !*value)
		die(_("attr spec must not be empty"));
 
	string_list_split(&list, value, ' ', -1);
	string_list_remove_empty_items(&list, 0);
 
	item->attr_check = attr_check_alloc();
	item->attr_match = xcalloc(list.nr, sizeof(struct attr_match));
 
	for_each_string_list_item(si, &list) {
		size_t attr_len;
		char *attr_name;
		const struct git_attr *a;
 
		int j = item->attr_match_nr++;
		const char *attr = si->string;
		struct attr_match *am = &item->attr_match[j];
 
		switch (*attr) {
		case '!':
			am->match_mode = MATCH_UNSPECIFIED;
			attr++;
			attr_len = strlen(attr);
			break;
		case '-':
			am->match_mode = MATCH_UNSET;
			attr++;
			attr_len = strlen(attr);
			break;
		default:
			attr_len = strcspn(attr, "=");
			if (attr[attr_len] != '=')
				am->match_mode = MATCH_SET;
			else {
				const char *v = &attr[attr_len + 1];
				am->match_mode = MATCH_VALUE;
				am->value = attr_value_unescape(v);
			}
			break;
		}
 
		attr_name = xmemdupz(attr, attr_len);
		a = git_attr(attr_name);
		if (!a)
			die(_("invalid attribute name %s"), attr_name);
 
		attr_check_append(item->attr_check, a);
 
		free(attr_name);
	}
 
	if (item->attr_check->nr != item->attr_match_nr)
		die("BUG: should have same number of entries");
 
	string_list_clear(&list, 0);
}
 
static inline int get_literal_global(void)
{
	static int literal = -1;
 
	if (literal < 0)
		literal = git_env_bool(GIT_LITERAL_PATHSPECS_ENVIRONMENT, 0);
 
	return literal;
}
 
static inline int get_glob_global(void)
{
	static int glob = -1;
 
	if (glob < 0)
		glob = git_env_bool(GIT_GLOB_PATHSPECS_ENVIRONMENT, 0);
 
	return glob;
}
 
static inline int get_noglob_global(void)
{
	static int noglob = -1;
 
	if (noglob < 0)
		noglob = git_env_bool(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, 0);
 
	return noglob;
}
 
static inline int get_icase_global(void)
{
	static int icase = -1;
 
	if (icase < 0)
		icase = git_env_bool(GIT_ICASE_PATHSPECS_ENVIRONMENT, 0);
 
	return icase;
}
 
static int get_global_magic(int element_magic)
{
	int global_magic = 0;
 
	if (get_literal_global())
		global_magic |= PATHSPEC_LITERAL;
 
	/* --glob-pathspec is overridden by :(literal) */
	if (get_glob_global() && !(element_magic & PATHSPEC_LITERAL))
		global_magic |= PATHSPEC_GLOB;
 
	if (get_glob_global() && get_noglob_global())
		die(_("global 'glob' and 'noglob' pathspec settings are incompatible"));
 
	if (get_icase_global())
		global_magic |= PATHSPEC_ICASE;
 
	if ((global_magic & PATHSPEC_LITERAL) &&
	    (global_magic & ~PATHSPEC_LITERAL))
		die(_("global 'literal' pathspec setting is incompatible "
		      "with all other global pathspec settings"));
 
	/* --noglob-pathspec adds :(literal) _unless_ :(glob) is specified */
	if (get_noglob_global() && !(element_magic & PATHSPEC_GLOB))
		global_magic |= PATHSPEC_LITERAL;
 
	return global_magic;
}
 
/*
 * Parse the pathspec element looking for long magic
 *
 * saves all magic in 'magic'
 * if prefix magic is used, save the prefix length in 'prefix_len'
 * returns the position in 'elem' after all magic has been parsed
 */
static const char *parse_long_magic(unsigned *magic, int *prefix_len,
				    struct pathspec_item *item,
				    const char *elem)
{
	const char *pos;
	const char *nextat;
 
	for (pos = elem + 2; *pos && *pos != ')'; pos = nextat) {
		size_t len = strcspn_escaped(pos, ",)");
		int i;
 
		if (pos[len] == ',')
			nextat = pos + len + 1; /* handle ',' */
		else
			nextat = pos + len; /* handle ')' and '\0' */
 
		if (!len)
			continue;
 
		if (starts_with(pos, "prefix:")) {
			char *endptr;
			*prefix_len = strtol(pos + 7, &endptr, 10);
			if (endptr - pos != len)
				die(_("invalid parameter for pathspec magic 'prefix'"));
			continue;
		}
 
		if (starts_with(pos, "attr:")) {
			char *attr_body = xmemdupz(pos + 5, len - 5);
			parse_pathspec_attr_match(item, attr_body);
			*magic |= PATHSPEC_ATTR;
			free(attr_body);
			continue;
		}
 
		for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
			if (strlen(pathspec_magic[i].name) == len &&
			    !strncmp(pathspec_magic[i].name, pos, len)) {
				*magic |= pathspec_magic[i].bit;
				break;
			}
		}
 
		if (ARRAY_SIZE(pathspec_magic) <= i)
			die(_("Invalid pathspec magic '%.*s' in '%s'"),
			    (int) len, pos, elem);
	}
 
	if (*pos != ')')
		die(_("Missing ')' at the end of pathspec magic in '%s'"),
		    elem);
	pos++;
 
	return pos;
}
 
/*
 * Parse the pathspec element looking for short magic
 *
 * saves all magic in 'magic'
 * returns the position in 'elem' after all magic has been parsed
 */
static const char *parse_short_magic(unsigned *magic, const char *elem)
{
	const char *pos;
 
	for (pos = elem + 1; *pos && *pos != ':'; pos++) {
		char ch = *pos;
		int i;
 
		/* Special case alias for '!' */
		if (ch == '^') {
			*magic |= PATHSPEC_EXCLUDE;
			continue;
		}
 
		if (!is_pathspec_magic(ch))
			break;
 
		for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
			if (pathspec_magic[i].mnemonic == ch) {
				*magic |= pathspec_magic[i].bit;
				break;
			}
		}
 
		if (ARRAY_SIZE(pathspec_magic) <= i)
			die(_("Unimplemented pathspec magic '%c' in '%s'"),
			    ch, elem);
	}
 
	if (*pos == ':')
		pos++;
 
	return pos;
}
 
static const char *parse_element_magic(unsigned *magic, int *prefix_len,
				       struct pathspec_item *item,
				       const char *elem)
{
	if (elem[0] != ':' || get_literal_global())
		return elem; /* nothing to do */
	else if (elem[1] == '(')
		/* longhand */
		return parse_long_magic(magic, prefix_len, item, elem);
	else
		/* shorthand */
		return parse_short_magic(magic, elem);
}
 
static void strip_submodule_slash_cheap(struct pathspec_item *item)
{
	if (item->len >= 1 && item->match[item->len - 1] == '/') {
		int i = cache_name_pos(item->match, item->len - 1);
 
		if (i >= 0 && S_ISGITLINK(active_cache[i]->ce_mode)) {
			item->len--;
			item->match[item->len] = '\0';
		}
	}
}
 
static void strip_submodule_slash_expensive(struct pathspec_item *item)
{
	int i;
 
	for (i = 0; i < active_nr; i++) {
		struct cache_entry *ce = active_cache[i];
		int ce_len = ce_namelen(ce);
 
		if (!S_ISGITLINK(ce->ce_mode))
			continue;
 
		if (item->len <= ce_len || item->match[ce_len] != '/' ||
		    memcmp(ce->name, item->match, ce_len))
			continue;
 
		if (item->len == ce_len + 1) {
			/* strip trailing slash */
			item->len--;
			item->match[item->len] = '\0';
		} else {
			die(_("Pathspec '%s' is in submodule '%.*s'"),
			    item->original, ce_len, ce->name);
		}
	}
}
 
static void die_inside_submodule_path(struct pathspec_item *item)
{
	int i;
 
	for (i = 0; i < active_nr; i++) {
		struct cache_entry *ce = active_cache[i];
		int ce_len = ce_namelen(ce);
 
		if (!S_ISGITLINK(ce->ce_mode))
			continue;
 
		if (item->len < ce_len ||
		    !(item->match[ce_len] == '/' || item->match[ce_len] == '\0') ||
		    memcmp(ce->name, item->match, ce_len))
			continue;
 
		die(_("Pathspec '%s' is in submodule '%.*s'"),
		    item->original, ce_len, ce->name);
	}
}
 
/*
 * Perform the initialization of a pathspec_item based on a pathspec element.
 */
static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
			       const char *prefix, int prefixlen,
			       const char *elt)
{
	unsigned magic = 0, element_magic = 0;
	const char *copyfrom = elt;
	char *match;
	int pathspec_prefix = -1;
 
	item->attr_check = NULL;
	item->attr_match = NULL;
	item->attr_match_nr = 0;
 
	/* PATHSPEC_LITERAL_PATH ignores magic */
	if (flags & PATHSPEC_LITERAL_PATH) {
		magic = PATHSPEC_LITERAL;
	} else {
		copyfrom = parse_element_magic(&element_magic,
					       &pathspec_prefix,
					       item,
					       elt);
		magic |= element_magic;
		magic |= get_global_magic(element_magic);
	}
 
	item->magic = magic;
 
	if (pathspec_prefix >= 0 &&
	    (prefixlen || (prefix && *prefix)))
		die("BUG: 'prefix' magic is supposed to be used at worktree's root");
 
	if ((magic & PATHSPEC_LITERAL) && (magic & PATHSPEC_GLOB))
		die(_("%s: 'literal' and 'glob' are incompatible"), elt);
 
	/* Create match string which will be used for pathspec matching */
	if (pathspec_prefix >= 0) {
		match = xstrdup(copyfrom);
		prefixlen = pathspec_prefix;
	} else if (magic & PATHSPEC_FROMTOP) {
		match = xstrdup(copyfrom);
		prefixlen = 0;
	} else {
		match = prefix_path_gently(prefix, prefixlen,
					   &prefixlen, copyfrom);
		if (!match)
			die(_("%s: '%s' is outside repository"), elt, copyfrom);
	}
 
	item->match = match;
	item->len = strlen(item->match);
	item->prefix = prefixlen;
 
	/*
	 * Prefix the pathspec (keep all magic) and assign to
	 * original. Useful for passing to another command.
	 */
	if ((flags & PATHSPEC_PREFIX_ORIGIN) &&
	    !get_literal_global()) {
		struct strbuf sb = STRBUF_INIT;
 
		/* Preserve the actual prefix length of each pattern */
		prefix_magic(&sb, prefixlen, element_magic);
 
		strbuf_addstr(&sb, match);
		item->original = strbuf_detach(&sb, NULL);
	} else {
		item->original = xstrdup(elt);
	}
 
	if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP)
		strip_submodule_slash_cheap(item);
 
	if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE)
		strip_submodule_slash_expensive(item);
 
	if (magic & PATHSPEC_LITERAL) {
		item->nowildcard_len = item->len;
	} else {
		item->nowildcard_len = simple_length(item->match);
		if (item->nowildcard_len < prefixlen)
			item->nowildcard_len = prefixlen;
	}
 
	item->flags = 0;
	if (magic & PATHSPEC_GLOB) {
		/*
		 * FIXME: should we enable ONESTAR in _GLOB for
		 * pattern "* * / * . c"?
		 */
	} else {
		if (item->nowildcard_len < item->len &&
		    item->match[item->nowildcard_len] == '*' &&
		    no_wildcard(item->match + item->nowildcard_len + 1))
			item->flags |= PATHSPEC_ONESTAR;
	}
 
	/* sanity checks, pathspec matchers assume these are sane */
	if (item->nowildcard_len > item->len ||
	    item->prefix         > item->len) {
		/*
		 * This case can be triggered by the user pointing us to a
		 * pathspec inside a submodule, which is an input error.
		 * Detect that here and complain, but fallback in the
		 * non-submodule case to a BUG, as we have no idea what
		 * would trigger that.
		 */
		die_inside_submodule_path(item);
		die ("BUG: item->nowildcard_len > item->len || item->prefix > item->len)");
	}
}
 
static int pathspec_item_cmp(const void *a_, const void *b_)
{
	struct pathspec_item *a, *b;
 
	a = (struct pathspec_item *)a_;
	b = (struct pathspec_item *)b_;
	return strcmp(a->match, b->match);
}
 
static void NORETURN unsupported_magic(const char *pattern,
				       unsigned magic)
{
	struct strbuf sb = STRBUF_INIT;
	int i;
	for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
		const struct pathspec_magic *m = pathspec_magic + i;
		if (!(magic & m->bit))
			continue;
		if (sb.len)
			strbuf_addstr(&sb, ", ");
 
		if (m->mnemonic)
			strbuf_addf(&sb, _("'%s' (mnemonic: '%c')"),
				    m->name, m->mnemonic);
		else
			strbuf_addf(&sb, "'%s'", m->name);
	}
	/*
	 * We may want to substitute "this command" with a command
	 * name. E.g. when add--interactive dies when running
	 * "checkout -p"
	 */
	die(_("%s: pathspec magic not supported by this command: %s"),
	    pattern, sb.buf);
}
 
/*
 * Given command line arguments and a prefix, convert the input to
 * pathspec. die() if any magic in magic_mask is used.
 */
void parse_pathspec(struct pathspec *pathspec,
		    unsigned magic_mask, unsigned flags,
		    const char *prefix, const char **argv)
{
	struct pathspec_item *item;
	const char *entry = argv ? *argv : NULL;
	int i, n, prefixlen, warn_empty_string, nr_exclude = 0;
 
	memset(pathspec, 0, sizeof(*pathspec));
 
	if (flags & PATHSPEC_MAXDEPTH_VALID)
		pathspec->magic |= PATHSPEC_MAXDEPTH;
 
	/* No arguments, no prefix -> no pathspec */
	if (!entry && !prefix)
		return;
 
	if ((flags & PATHSPEC_PREFER_CWD) &&
	    (flags & PATHSPEC_PREFER_FULL))
		die("BUG: PATHSPEC_PREFER_CWD and PATHSPEC_PREFER_FULL are incompatible");
 
	/* No arguments with prefix -> prefix pathspec */
	if (!entry) {
		if (flags & PATHSPEC_PREFER_FULL)
			return;
 
		if (!(flags & PATHSPEC_PREFER_CWD))
			die("BUG: PATHSPEC_PREFER_CWD requires arguments");
 
		pathspec->items = item = xcalloc(1, sizeof(*item));
		item->match = xstrdup(prefix);
		item->original = xstrdup(prefix);
		item->nowildcard_len = item->len = strlen(prefix);
		item->prefix = item->len;
		pathspec->nr = 1;
		return;
	}
 
	n = 0;
	warn_empty_string = 1;
	while (argv[n]) {
		if (*argv[n] == '\0' && warn_empty_string) {
			warning(_("empty strings as pathspecs will be made invalid in upcoming releases. "
				  "please use . instead if you meant to match all paths"));
			warn_empty_string = 0;
		}
		n++;
	}
 
	pathspec->nr = n;
	ALLOC_ARRAY(pathspec->items, n + 1);
	item = pathspec->items;
	prefixlen = prefix ? strlen(prefix) : 0;
 
	for (i = 0; i < n; i++) {
		entry = argv[i];
 
		init_pathspec_item(item + i, flags, prefix, prefixlen, entry);
 
		if (item[i].magic & PATHSPEC_EXCLUDE)
			nr_exclude++;
		if (item[i].magic & magic_mask)
			unsupported_magic(entry, item[i].magic & magic_mask);
 
		if ((flags & PATHSPEC_SYMLINK_LEADING_PATH) &&
		    has_symlink_leading_path(item[i].match, item[i].len)) {
			die(_("pathspec '%s' is beyond a symbolic link"), entry);
		}
 
		if (item[i].nowildcard_len < item[i].len)
			pathspec->has_wildcard = 1;
		pathspec->magic |= item[i].magic;
	}
 
	/*
	 * If everything is an exclude pattern, add one positive pattern
	 * that matches everyting. We allocated an extra one for this.
	 */
	if (nr_exclude == n) {
		int plen = (!(flags & PATHSPEC_PREFER_CWD)) ? 0 : prefixlen;
		init_pathspec_item(item + n, 0, prefix, plen, "");
		pathspec->nr++;
	}
 
	if (pathspec->magic & PATHSPEC_MAXDEPTH) {
		if (flags & PATHSPEC_KEEP_ORDER)
			die("BUG: PATHSPEC_MAXDEPTH_VALID and PATHSPEC_KEEP_ORDER are incompatible");
		QSORT(pathspec->items, pathspec->nr, pathspec_item_cmp);
	}
}
 
void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
{
	int i, j;
 
	*dst = *src;
	ALLOC_ARRAY(dst->items, dst->nr);
	COPY_ARRAY(dst->items, src->items, dst->nr);
 
	for (i = 0; i < dst->nr; i++) {
		struct pathspec_item *d = &dst->items[i];
		struct pathspec_item *s = &src->items[i];
 
		d->match = xstrdup(s->match);
		d->original = xstrdup(s->original);
 
		ALLOC_ARRAY(d->attr_match, d->attr_match_nr);
		COPY_ARRAY(d->attr_match, s->attr_match, d->attr_match_nr);
		for (j = 0; j < d->attr_match_nr; j++) {
			const char *value = s->attr_match[j].value;
			d->attr_match[j].value = xstrdup_or_null(value);
		}
 
		d->attr_check = attr_check_dup(s->attr_check);
	}
}
 
void clear_pathspec(struct pathspec *pathspec)
{
	int i, j;
 
	for (i = 0; i < pathspec->nr; i++) {
		free(pathspec->items[i].match);
		free(pathspec->items[i].original);
 
		for (j = 0; j < pathspec->items[i].attr_match_nr; j++)
			free(pathspec->items[i].attr_match[j].value);
		free(pathspec->items[i].attr_match);
 
		if (pathspec->items[i].attr_check)
			attr_check_free(pathspec->items[i].attr_check);
	}
 
	free(pathspec->items);
	pathspec->items = NULL;
	pathspec->nr = 0;
}