pathspec.c

   1 #include "cache.h"
   2 #include "dir.h"
   3 #include "pathspec.h"
   4 #include "attr.h"
   5
   6 /*
   7  * Finds which of the given pathspecs match items in the index.
   8  *
   9  * For each pathspec, sets the corresponding entry in the seen[] array
  10  * (which should be specs items long, i.e. the same size as pathspec)
  11  * to the nature of the "closest" (i.e. most specific) match found for
  12  * that pathspec in the index, if it was a closer type of match than
  13  * the existing entry.  As an optimization, matching is skipped
  14  * altogether if seen[] already only contains non-zero entries.
  15  *
  16  * If seen[] has not already been written to, it may make sense
  17  * to use find_pathspecs_matching_against_index() instead.
  18  */
  19 void add_pathspec_matches_against_index(const struct pathspec *pathspec,
  20                                         char *seen)
  21 {
  22         int num_unmatched = 0, i;
  23
  24         /*
  25          * Since we are walking the index as if we were walking the directory,
  26          * we have to mark the matched pathspec as seen; otherwise we will
  27          * mistakenly think that the user gave a pathspec that did not match
  28          * anything.
  29          */
  30         for (i = 0; i < pathspec->nr; i++)
  31                 if (!seen[i])
  32                         num_unmatched++;
  33         if (!num_unmatched)
  34                 return;
  35         for (i = 0; i < active_nr; i++) {
  36                 const struct cache_entry *ce = active_cache[i];
  37                 ce_path_match(ce, pathspec, seen);
  38         }
  39 }
  40
  41 /*
  42  * Finds which of the given pathspecs match items in the index.
  43  *
  44  * This is a one-shot wrapper around add_pathspec_matches_against_index()
  45  * which allocates, populates, and returns a seen[] array indicating the
  46  * nature of the "closest" (i.e. most specific) matches which each of the
  47  * given pathspecs achieves against all items in the index.
  48  */
  49 char *find_pathspecs_matching_against_index(const struct pathspec *pathspec)
  50 {
  51         char *seen = xcalloc(pathspec->nr, 1);
  52         add_pathspec_matches_against_index(pathspec, seen);
  53         return seen;
  54 }
  55
  56 /*
  57  * Magic pathspec
  58  *
  59  * Possible future magic semantics include stuff like:
  60  *
  61  *      { PATHSPEC_RECURSIVE, '*', "recursive" },
  62  *      { PATHSPEC_REGEXP, '\0', "regexp" },
  63  *
  64  */
  65
  66 static struct pathspec_magic {
  67         unsigned bit;
  68         char mnemonic; /* this cannot be ':'! */
  69         const char *name;
  70 } pathspec_magic[] = {
  71         { PATHSPEC_FROMTOP,  '/', "top" },
  72         { PATHSPEC_LITERAL, '\0', "literal" },
  73         { PATHSPEC_GLOB,    '\0', "glob" },
  74         { PATHSPEC_ICASE,   '\0', "icase" },
  75         { PATHSPEC_EXCLUDE,  '!', "exclude" },
  76         { PATHSPEC_ATTR,    '\0', "attr" },
  77 };
  78
  79 static void prefix_magic(struct strbuf *sb, int prefixlen, unsigned magic)
  80 {
  81         int i;
  82         strbuf_addstr(sb, ":(");
  83         for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
  84                 if (magic & pathspec_magic[i].bit) {
  85                         if (sb->buf[sb->len - 1] != '(')
  86                                 strbuf_addch(sb, ',');
  87                         strbuf_addstr(sb, pathspec_magic[i].name);
  88                 }
  89         strbuf_addf(sb, ",prefix:%d)", prefixlen);
  90 }
  91
  92 static size_t strcspn_escaped(const char *s, const char *stop)
  93 {
  94         const char *i;
  95
  96         for (i = s; *i; i++) {
  97                 /* skip the escaped character */
  98                 if (i[0] == '\\' && i[1]) {
  99                         i++;
 100                         continue;
 101                 }
 102
 103                 if (strchr(stop, *i))
 104                         break;
 105         }
 106         return i - s;
 107 }
 108
 109 static inline int invalid_value_char(const char ch)
 110 {
 111         if (isalnum(ch) || strchr(",-_", ch))
 112                 return 0;
 113         return -1;
 114 }
 115
 116 static char *attr_value_unescape(const char *value)
 117 {
 118         const char *src;
 119         char *dst, *ret;
 120
 121         ret = xmallocz(strlen(value));
 122         for (src = value, dst = ret; *src; src++, dst++) {
 123                 if (*src == '\\') {
 124                         if (!src[1])
 125                                 die(_("Escape character '\\' not allowed as "
 126                                       "last character in attr value"));
 127                         src++;
 128                 }
 129                 if (invalid_value_char(*src))
 130                         die("cannot use '%c' for value matching", *src);
 131                 *dst = *src;
 132         }
 133         *dst = '\0';
 134         return ret;
 135 }
 136
 137 static void parse_pathspec_attr_match(struct pathspec_item *item, const char *value)
 138 {
 139         struct string_list_item *si;
 140         struct string_list list = STRING_LIST_INIT_DUP;
 141
 142         if (item->attr_check || item->attr_match)
 143                 die(_("Only one 'attr:' specification is allowed."));
 144
 145         if (!value || !*value)
 146                 die(_("attr spec must not be empty"));
 147
 148         string_list_split(&list, value, ' ', -1);
 149         string_list_remove_empty_items(&list, 0);
 150
 151         item->attr_check = attr_check_alloc();
 152         item->attr_match = xcalloc(list.nr, sizeof(struct attr_match));
 153
 154         for_each_string_list_item(si, &list) {
 155                 size_t attr_len;
 156                 char *attr_name;
 157                 const struct git_attr *a;
 158
 159                 int j = item->attr_match_nr++;
 160                 const char *attr = si->string;
 161                 struct attr_match *am = &item->attr_match[j];
 162
 163                 switch (*attr) {
 164                 case '!':
 165                         am->match_mode = MATCH_UNSPECIFIED;
 166                         attr++;
 167                         attr_len = strlen(attr);
 168                         break;
 169                 case '-':
 170                         am->match_mode = MATCH_UNSET;
 171                         attr++;
 172                         attr_len = strlen(attr);
 173                         break;
 174                 default:
 175                         attr_len = strcspn(attr, "=");
 176                         if (attr[attr_len] != '=')
 177                                 am->match_mode = MATCH_SET;
 178                         else {
 179                                 const char *v = &attr[attr_len + 1];
 180                                 am->match_mode = MATCH_VALUE;
 181                                 am->value = attr_value_unescape(v);
 182                         }
 183                         break;
 184                 }
 185
 186                 attr_name = xmemdupz(attr, attr_len);
 187                 a = git_attr(attr_name);
 188                 if (!a)
 189                         die(_("invalid attribute name %s"), attr_name);
 190
 191                 attr_check_append(item->attr_check, a);
 192
 193                 free(attr_name);
 194         }
 195
 196         if (item->attr_check->nr != item->attr_match_nr)
 197                 die("BUG: should have same number of entries");
 198
 199         string_list_clear(&list, 0);
 200 }
 201
 202 static inline int get_literal_global(void)
 203 {
 204         static int literal = -1;
 205
 206         if (literal < 0)
 207                 literal = git_env_bool(GIT_LITERAL_PATHSPECS_ENVIRONMENT, 0);
 208
 209         return literal;
 210 }
 211
 212 static inline int get_glob_global(void)
 213 {
 214         static int glob = -1;
 215
 216         if (glob < 0)
 217                 glob = git_env_bool(GIT_GLOB_PATHSPECS_ENVIRONMENT, 0);
 218
 219         return glob;
 220 }
 221
 222 static inline int get_noglob_global(void)
 223 {
 224         static int noglob = -1;
 225
 226         if (noglob < 0)
 227                 noglob = git_env_bool(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, 0);
 228
 229         return noglob;
 230 }
 231
 232 static inline int get_icase_global(void)
 233 {
 234         static int icase = -1;
 235
 236         if (icase < 0)
 237                 icase = git_env_bool(GIT_ICASE_PATHSPECS_ENVIRONMENT, 0);
 238
 239         return icase;
 240 }
 241
 242 static int get_global_magic(int element_magic)
 243 {
 244         int global_magic = 0;
 245
 246         if (get_literal_global())
 247                 global_magic |= PATHSPEC_LITERAL;
 248
 249         /* --glob-pathspec is overridden by :(literal) */
 250         if (get_glob_global() && !(element_magic & PATHSPEC_LITERAL))
 251                 global_magic |= PATHSPEC_GLOB;
 252
 253         if (get_glob_global() && get_noglob_global())
 254                 die(_("global 'glob' and 'noglob' pathspec settings are incompatible"));
 255
 256         if (get_icase_global())
 257                 global_magic |= PATHSPEC_ICASE;
 258
 259         if ((global_magic & PATHSPEC_LITERAL) &&
 260             (global_magic & ~PATHSPEC_LITERAL))
 261                 die(_("global 'literal' pathspec setting is incompatible "
 262                       "with all other global pathspec settings"));
 263
 264         /* --noglob-pathspec adds :(literal) _unless_ :(glob) is specified */
 265         if (get_noglob_global() && !(element_magic & PATHSPEC_GLOB))
 266                 global_magic |= PATHSPEC_LITERAL;
 267
 268         return global_magic;
 269 }
 270
 271 /*
 272  * Parse the pathspec element looking for long magic
 273  *
 274  * saves all magic in 'magic'
 275  * if prefix magic is used, save the prefix length in 'prefix_len'
 276  * returns the position in 'elem' after all magic has been parsed
 277  */
 278 static const char *parse_long_magic(unsigned *magic, int *prefix_len,
 279                                     struct pathspec_item *item,
 280                                     const char *elem)
 281 {
 282         const char *pos;
 283         const char *nextat;
 284
 285         for (pos = elem + 2; *pos && *pos != ')'; pos = nextat) {
 286                 size_t len = strcspn_escaped(pos, ",)");
 287                 int i;
 288
 289                 if (pos[len] == ',')
 290                         nextat = pos + len + 1; /* handle ',' */
 291                 else
 292                         nextat = pos + len; /* handle ')' and '\0' */
 293
 294                 if (!len)
 295                         continue;
 296
 297                 if (starts_with(pos, "prefix:")) {
 298                         char *endptr;
 299                         *prefix_len = strtol(pos + 7, &endptr, 10);
 300                         if (endptr - pos != len)
 301                                 die(_("invalid parameter for pathspec magic 'prefix'"));
 302                         continue;
 303                 }
 304
 305                 if (starts_with(pos, "attr:")) {
 306                         char *attr_body = xmemdupz(pos + 5, len - 5);
 307                         parse_pathspec_attr_match(item, attr_body);
 308                         *magic |= PATHSPEC_ATTR;
 309                         free(attr_body);
 310                         continue;
 311                 }
 312
 313                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 314                         if (strlen(pathspec_magic[i].name) == len &&
 315                             !strncmp(pathspec_magic[i].name, pos, len)) {
 316                                 *magic |= pathspec_magic[i].bit;
 317                                 break;
 318                         }
 319                 }
 320
 321                 if (ARRAY_SIZE(pathspec_magic) <= i)
 322                         die(_("Invalid pathspec magic '%.*s' in '%s'"),
 323                             (int) len, pos, elem);
 324         }
 325
 326         if (*pos != ')')
 327                 die(_("Missing ')' at the end of pathspec magic in '%s'"),
 328                     elem);
 329         pos++;
 330
 331         return pos;
 332 }
 333
 334 /*
 335  * Parse the pathspec element looking for short magic
 336  *
 337  * saves all magic in 'magic'
 338  * returns the position in 'elem' after all magic has been parsed
 339  */
 340 static const char *parse_short_magic(unsigned *magic, const char *elem)
 341 {
 342         const char *pos;
 343
 344         for (pos = elem + 1; *pos && *pos != ':'; pos++) {
 345                 char ch = *pos;
 346                 int i;
 347
 348                 /* Special case alias for '!' */
 349                 if (ch == '^') {
 350                         *magic |= PATHSPEC_EXCLUDE;
 351                         continue;
 352                 }
 353
 354                 if (!is_pathspec_magic(ch))
 355                         break;
 356
 357                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 358                         if (pathspec_magic[i].mnemonic == ch) {
 359                                 *magic |= pathspec_magic[i].bit;
 360                                 break;
 361                         }
 362                 }
 363
 364                 if (ARRAY_SIZE(pathspec_magic) <= i)
 365                         die(_("Unimplemented pathspec magic '%c' in '%s'"),
 366                             ch, elem);
 367         }
 368
 369         if (*pos == ':')
 370                 pos++;
 371
 372         return pos;
 373 }
 374
 375 static const char *parse_element_magic(unsigned *magic, int *prefix_len,
 376                                        struct pathspec_item *item,
 377                                        const char *elem)
 378 {
 379         if (elem[0] != ':' || get_literal_global())
 380                 return elem; /* nothing to do */
 381         else if (elem[1] == '(')
 382                 /* longhand */
 383                 return parse_long_magic(magic, prefix_len, item, elem);
 384         else
 385                 /* shorthand */
 386                 return parse_short_magic(magic, elem);
 387 }
 388
 389 static void strip_submodule_slash_cheap(struct pathspec_item *item)
 390 {
 391         if (item->len >= 1 && item->match[item->len - 1] == '/') {
 392                 int i = cache_name_pos(item->match, item->len - 1);
 393
 394                 if (i >= 0 && S_ISGITLINK(active_cache[i]->ce_mode)) {
 395                         item->len--;
 396                         item->match[item->len] = '\0';
 397                 }
 398         }
 399 }
 400
 401 static void strip_submodule_slash_expensive(struct pathspec_item *item)
 402 {
 403         int i;
 404
 405         for (i = 0; i < active_nr; i++) {
 406                 struct cache_entry *ce = active_cache[i];
 407                 int ce_len = ce_namelen(ce);
 408
 409                 if (!S_ISGITLINK(ce->ce_mode))
 410                         continue;
 411
 412                 if (item->len <= ce_len || item->match[ce_len] != '/' ||
 413                     memcmp(ce->name, item->match, ce_len))
 414                         continue;
 415
 416                 if (item->len == ce_len + 1) {
 417                         /* strip trailing slash */
 418                         item->len--;
 419                         item->match[item->len] = '\0';
 420                 } else {
 421                         die(_("Pathspec '%s' is in submodule '%.*s'"),
 422                             item->original, ce_len, ce->name);
 423                 }
 424         }
 425 }
 426
 427 static void die_inside_submodule_path(struct pathspec_item *item)
 428 {
 429         int i;
 430
 431         for (i = 0; i < active_nr; i++) {
 432                 struct cache_entry *ce = active_cache[i];
 433                 int ce_len = ce_namelen(ce);
 434
 435                 if (!S_ISGITLINK(ce->ce_mode))
 436                         continue;
 437
 438                 if (item->len < ce_len ||
 439                     !(item->match[ce_len] == '/' || item->match[ce_len] == '\0') ||
 440                     memcmp(ce->name, item->match, ce_len))
 441                         continue;
 442
 443                 die(_("Pathspec '%s' is in submodule '%.*s'"),
 444                     item->original, ce_len, ce->name);
 445         }
 446 }
 447
 448 /*
 449  * Perform the initialization of a pathspec_item based on a pathspec element.
 450  */
 451 static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 452                                const char *prefix, int prefixlen,
 453                                const char *elt)
 454 {
 455         unsigned magic = 0, element_magic = 0;
 456         const char *copyfrom = elt;
 457         char *match;
 458         int pathspec_prefix = -1;
 459
 460         item->attr_check = NULL;
 461         item->attr_match = NULL;
 462         item->attr_match_nr = 0;
 463
 464         /* PATHSPEC_LITERAL_PATH ignores magic */
 465         if (flags & PATHSPEC_LITERAL_PATH) {
 466                 magic = PATHSPEC_LITERAL;
 467         } else {
 468                 copyfrom = parse_element_magic(&element_magic,
 469                                                &pathspec_prefix,
 470                                                item,
 471                                                elt);
 472                 magic |= element_magic;
 473                 magic |= get_global_magic(element_magic);
 474         }
 475
 476         item->magic = magic;
 477
 478         if (pathspec_prefix >= 0 &&
 479             (prefixlen || (prefix && *prefix)))
 480                 die("BUG: 'prefix' magic is supposed to be used at worktree's root");
 481
 482         if ((magic & PATHSPEC_LITERAL) && (magic & PATHSPEC_GLOB))
 483                 die(_("%s: 'literal' and 'glob' are incompatible"), elt);
 484
 485         /* Create match string which will be used for pathspec matching */
 486         if (pathspec_prefix >= 0) {
 487                 match = xstrdup(copyfrom);
 488                 prefixlen = pathspec_prefix;
 489         } else if (magic & PATHSPEC_FROMTOP) {
 490                 match = xstrdup(copyfrom);
 491                 prefixlen = 0;
 492         } else {
 493                 match = prefix_path_gently(prefix, prefixlen,
 494                                            &prefixlen, copyfrom);
 495                 if (!match)
 496                         die(_("%s: '%s' is outside repository"), elt, copyfrom);
 497         }
 498
 499         item->match = match;
 500         item->len = strlen(item->match);
 501         item->prefix = prefixlen;
 502
 503         /*
 504          * Prefix the pathspec (keep all magic) and assign to
 505          * original. Useful for passing to another command.
 506          */
 507         if ((flags & PATHSPEC_PREFIX_ORIGIN) &&
 508             !get_literal_global()) {
 509                 struct strbuf sb = STRBUF_INIT;
 510
 511                 /* Preserve the actual prefix length of each pattern */
 512                 prefix_magic(&sb, prefixlen, element_magic);
 513
 514                 strbuf_addstr(&sb, match);
 515                 item->original = strbuf_detach(&sb, NULL);
 516         } else {
 517                 item->original = xstrdup(elt);
 518         }
 519
 520         if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP)
 521                 strip_submodule_slash_cheap(item);
 522
 523         if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE)
 524                 strip_submodule_slash_expensive(item);
 525
 526         if (magic & PATHSPEC_LITERAL) {
 527                 item->nowildcard_len = item->len;
 528         } else {
 529                 item->nowildcard_len = simple_length(item->match);
 530                 if (item->nowildcard_len < prefixlen)
 531                         item->nowildcard_len = prefixlen;
 532         }
 533
 534         item->flags = 0;
 535         if (magic & PATHSPEC_GLOB) {
 536                 /*
 537                  * FIXME: should we enable ONESTAR in _GLOB for
 538                  * pattern "* * / * . c"?
 539                  */
 540         } else {
 541                 if (item->nowildcard_len < item->len &&
 542                     item->match[item->nowildcard_len] == '*' &&
 543                     no_wildcard(item->match + item->nowildcard_len + 1))
 544                         item->flags |= PATHSPEC_ONESTAR;
 545         }
 546
 547         /* sanity checks, pathspec matchers assume these are sane */
 548         if (item->nowildcard_len > item->len ||
 549             item->prefix         > item->len) {
 550                 /*
 551                  * This case can be triggered by the user pointing us to a
 552                  * pathspec inside a submodule, which is an input error.
 553                  * Detect that here and complain, but fallback in the
 554                  * non-submodule case to a BUG, as we have no idea what
 555                  * would trigger that.
 556                  */
 557                 die_inside_submodule_path(item);
 558                 die ("BUG: item->nowildcard_len > item->len || item->prefix > item->len)");
 559         }
 560 }
 561
 562 static int pathspec_item_cmp(const void *a_, const void *b_)
 563 {
 564         struct pathspec_item *a, *b;
 565
 566         a = (struct pathspec_item *)a_;
 567         b = (struct pathspec_item *)b_;
 568         return strcmp(a->match, b->match);
 569 }
 570
 571 static void NORETURN unsupported_magic(const char *pattern,
 572                                        unsigned magic)
 573 {
 574         struct strbuf sb = STRBUF_INIT;
 575         int i;
 576         for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 577                 const struct pathspec_magic *m = pathspec_magic + i;
 578                 if (!(magic & m->bit))
 579                         continue;
 580                 if (sb.len)
 581                         strbuf_addstr(&sb, ", ");
 582
 583                 if (m->mnemonic)
 584                         strbuf_addf(&sb, _("'%s' (mnemonic: '%c')"),
 585                                     m->name, m->mnemonic);
 586                 else
 587                         strbuf_addf(&sb, "'%s'", m->name);
 588         }
 589         /*
 590          * We may want to substitute "this command" with a command
 591          * name. E.g. when add--interactive dies when running
 592          * "checkout -p"
 593          */
 594         die(_("%s: pathspec magic not supported by this command: %s"),
 595             pattern, sb.buf);
 596 }
 597
 598 /*
 599  * Given command line arguments and a prefix, convert the input to
 600  * pathspec. die() if any magic in magic_mask is used.
 601  */
 602 void parse_pathspec(struct pathspec *pathspec,
 603                     unsigned magic_mask, unsigned flags,
 604                     const char *prefix, const char **argv)
 605 {
 606         struct pathspec_item *item;
 607         const char *entry = argv ? *argv : NULL;
 608         int i, n, prefixlen, warn_empty_string, nr_exclude = 0;
 609
 610         memset(pathspec, 0, sizeof(*pathspec));
 611
 612         if (flags & PATHSPEC_MAXDEPTH_VALID)
 613                 pathspec->magic |= PATHSPEC_MAXDEPTH;
 614
 615         /* No arguments, no prefix -> no pathspec */
 616         if (!entry && !prefix)
 617                 return;
 618
 619         if ((flags & PATHSPEC_PREFER_CWD) &&
 620             (flags & PATHSPEC_PREFER_FULL))
 621                 die("BUG: PATHSPEC_PREFER_CWD and PATHSPEC_PREFER_FULL are incompatible");
 622
 623         /* No arguments with prefix -> prefix pathspec */
 624         if (!entry) {
 625                 if (flags & PATHSPEC_PREFER_FULL)
 626                         return;
 627
 628                 if (!(flags & PATHSPEC_PREFER_CWD))
 629                         die("BUG: PATHSPEC_PREFER_CWD requires arguments");
 630
 631                 pathspec->items = item = xcalloc(1, sizeof(*item));
 632                 item->match = xstrdup(prefix);
 633                 item->original = xstrdup(prefix);
 634                 item->nowildcard_len = item->len = strlen(prefix);
 635                 item->prefix = item->len;
 636                 pathspec->nr = 1;
 637                 return;
 638         }
 639
 640         n = 0;
 641         warn_empty_string = 1;
 642         while (argv[n]) {
 643                 if (*argv[n] == '\0' && warn_empty_string) {
 644                         warning(_("empty strings as pathspecs will be made invalid in upcoming releases. "
 645                                   "please use . instead if you meant to match all paths"));
 646                         warn_empty_string = 0;
 647                 }
 648                 n++;
 649         }
 650
 651         pathspec->nr = n;
 652         ALLOC_ARRAY(pathspec->items, n + 1);
 653         item = pathspec->items;
 654         prefixlen = prefix ? strlen(prefix) : 0;
 655
 656         for (i = 0; i < n; i++) {
 657                 entry = argv[i];
 658
 659                 init_pathspec_item(item + i, flags, prefix, prefixlen, entry);
 660
 661                 if (item[i].magic & PATHSPEC_EXCLUDE)
 662                         nr_exclude++;
 663                 if (item[i].magic & magic_mask)
 664                         unsupported_magic(entry, item[i].magic & magic_mask);
 665
 666                 if ((flags & PATHSPEC_SYMLINK_LEADING_PATH) &&
 667                     has_symlink_leading_path(item[i].match, item[i].len)) {
 668                         die(_("pathspec '%s' is beyond a symbolic link"), entry);
 669                 }
 670
 671                 if (item[i].nowildcard_len < item[i].len)
 672                         pathspec->has_wildcard = 1;
 673                 pathspec->magic |= item[i].magic;
 674         }
 675
 676         /*
 677          * If everything is an exclude pattern, add one positive pattern
 678          * that matches everyting. We allocated an extra one for this.
 679          */
 680         if (nr_exclude == n) {
 681                 int plen = (!(flags & PATHSPEC_PREFER_CWD)) ? 0 : prefixlen;
 682                 init_pathspec_item(item + n, 0, prefix, plen, "");
 683                 pathspec->nr++;
 684         }
 685
 686         if (pathspec->magic & PATHSPEC_MAXDEPTH) {
 687                 if (flags & PATHSPEC_KEEP_ORDER)
 688                         die("BUG: PATHSPEC_MAXDEPTH_VALID and PATHSPEC_KEEP_ORDER are incompatible");
 689                 QSORT(pathspec->items, pathspec->nr, pathspec_item_cmp);
 690         }
 691 }
 692
 693 void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
 694 {
 695         int i, j;
 696
 697         *dst = *src;
 698         ALLOC_ARRAY(dst->items, dst->nr);
 699         COPY_ARRAY(dst->items, src->items, dst->nr);
 700
 701         for (i = 0; i < dst->nr; i++) {
 702                 struct pathspec_item *d = &dst->items[i];
 703                 struct pathspec_item *s = &src->items[i];
 704
 705                 d->match = xstrdup(s->match);
 706                 d->original = xstrdup(s->original);
 707
 708                 ALLOC_ARRAY(d->attr_match, d->attr_match_nr);
 709                 COPY_ARRAY(d->attr_match, s->attr_match, d->attr_match_nr);
 710                 for (j = 0; j < d->attr_match_nr; j++) {
 711                         const char *value = s->attr_match[j].value;
 712                         d->attr_match[j].value = xstrdup_or_null(value);
 713                 }
 714
 715                 d->attr_check = attr_check_dup(s->attr_check);
 716         }
 717 }
 718
 719 void clear_pathspec(struct pathspec *pathspec)
 720 {
 721         int i, j;
 722
 723         for (i = 0; i < pathspec->nr; i++) {
 724                 free(pathspec->items[i].match);
 725                 free(pathspec->items[i].original);
 726
 727                 for (j = 0; j < pathspec->items[i].attr_match_nr; j++)
 728                         free(pathspec->items[i].attr_match[j].value);
 729                 free(pathspec->items[i].attr_match);
 730
 731                 if (pathspec->items[i].attr_check)
 732                         attr_check_free(pathspec->items[i].attr_check);
 733         }
 734
 735         free(pathspec->items);
 736         pathspec->items = NULL;
 737         pathspec->nr = 0;
 738 }