pathspec.c

   1 #include "cache.h"
   2 #include "config.h"
   3 #include "dir.h"
   4 #include "pathspec.h"
   5 #include "attr.h"
   6 #include "strvec.h"
   7 #include "quote.h"
   8
   9 /*
  10  * Finds which of the given pathspecs match items in the index.
  11  *
  12  * For each pathspec, sets the corresponding entry in the seen[] array
  13  * (which should be specs items long, i.e. the same size as pathspec)
  14  * to the nature of the "closest" (i.e. most specific) match found for
  15  * that pathspec in the index, if it was a closer type of match than
  16  * the existing entry.  As an optimization, matching is skipped
  17  * altogether if seen[] already only contains non-zero entries.
  18  *
  19  * If seen[] has not already been written to, it may make sense
  20  * to use find_pathspecs_matching_against_index() instead.
  21  */
  22 void add_pathspec_matches_against_index(const struct pathspec *pathspec,
  23                                         struct index_state *istate,
  24                                         char *seen,
  25                                         enum ps_skip_worktree_action sw_action)
  26 {
  27         int num_unmatched = 0, i;
  28
  29         /*
  30          * Since we are walking the index as if we were walking the directory,
  31          * we have to mark the matched pathspec as seen; otherwise we will
  32          * mistakenly think that the user gave a pathspec that did not match
  33          * anything.
  34          */
  35         for (i = 0; i < pathspec->nr; i++)
  36                 if (!seen[i])
  37                         num_unmatched++;
  38         if (!num_unmatched)
  39                 return;
  40         for (i = 0; i < istate->cache_nr; i++) {
  41                 const struct cache_entry *ce = istate->cache[i];
  42                 if (sw_action == PS_IGNORE_SKIP_WORKTREE &&
  43                     (ce_skip_worktree(ce) || !path_in_sparse_checkout(ce->name, istate)))
  44                         continue;
  45                 ce_path_match(istate, ce, pathspec, seen);
  46         }
  47 }
  48
  49 /*
  50  * Finds which of the given pathspecs match items in the index.
  51  *
  52  * This is a one-shot wrapper around add_pathspec_matches_against_index()
  53  * which allocates, populates, and returns a seen[] array indicating the
  54  * nature of the "closest" (i.e. most specific) matches which each of the
  55  * given pathspecs achieves against all items in the index.
  56  */
  57 char *find_pathspecs_matching_against_index(const struct pathspec *pathspec,
  58                                             struct index_state *istate,
  59                                             enum ps_skip_worktree_action sw_action)
  60 {
  61         char *seen = xcalloc(pathspec->nr, 1);
  62         add_pathspec_matches_against_index(pathspec, istate, seen, sw_action);
  63         return seen;
  64 }
  65
  66 char *find_pathspecs_matching_skip_worktree(const struct pathspec *pathspec)
  67 {
  68         struct index_state *istate = the_repository->index;
  69         char *seen = xcalloc(pathspec->nr, 1);
  70         int i;
  71
  72         for (i = 0; i < istate->cache_nr; i++) {
  73                 struct cache_entry *ce = istate->cache[i];
  74                 if (ce_skip_worktree(ce) || !path_in_sparse_checkout(ce->name, istate))
  75                     ce_path_match(istate, ce, pathspec, seen);
  76         }
  77
  78         return seen;
  79 }
  80
  81 /*
  82  * Magic pathspec
  83  *
  84  * Possible future magic semantics include stuff like:
  85  *
  86  *      { PATHSPEC_RECURSIVE, '*', "recursive" },
  87  *      { PATHSPEC_REGEXP, '\0', "regexp" },
  88  *
  89  */
  90
  91 static struct pathspec_magic {
  92         unsigned bit;
  93         char mnemonic; /* this cannot be ':'! */
  94         const char *name;
  95 } pathspec_magic[] = {
  96         { PATHSPEC_FROMTOP,  '/', "top" },
  97         { PATHSPEC_LITERAL, '\0', "literal" },
  98         { PATHSPEC_GLOB,    '\0', "glob" },
  99         { PATHSPEC_ICASE,   '\0', "icase" },
 100         { PATHSPEC_EXCLUDE,  '!', "exclude" },
 101         { PATHSPEC_ATTR,    '\0', "attr" },
 102 };
 103
 104 static void prefix_magic(struct strbuf *sb, int prefixlen, unsigned magic)
 105 {
 106         int i;
 107         strbuf_addstr(sb, ":(");
 108         for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
 109                 if (magic & pathspec_magic[i].bit) {
 110                         if (sb->buf[sb->len - 1] != '(')
 111                                 strbuf_addch(sb, ',');
 112                         strbuf_addstr(sb, pathspec_magic[i].name);
 113                 }
 114         strbuf_addf(sb, ",prefix:%d)", prefixlen);
 115 }
 116
 117 static size_t strcspn_escaped(const char *s, const char *stop)
 118 {
 119         const char *i;
 120
 121         for (i = s; *i; i++) {
 122                 /* skip the escaped character */
 123                 if (i[0] == '\\' && i[1]) {
 124                         i++;
 125                         continue;
 126                 }
 127
 128                 if (strchr(stop, *i))
 129                         break;
 130         }
 131         return i - s;
 132 }
 133
 134 static inline int invalid_value_char(const char ch)
 135 {
 136         if (isalnum(ch) || strchr(",-_", ch))
 137                 return 0;
 138         return -1;
 139 }
 140
 141 static char *attr_value_unescape(const char *value)
 142 {
 143         const char *src;
 144         char *dst, *ret;
 145
 146         ret = xmallocz(strlen(value));
 147         for (src = value, dst = ret; *src; src++, dst++) {
 148                 if (*src == '\\') {
 149                         if (!src[1])
 150                                 die(_("Escape character '\\' not allowed as "
 151                                       "last character in attr value"));
 152                         src++;
 153                 }
 154                 if (invalid_value_char(*src))
 155                         die("cannot use '%c' for value matching", *src);
 156                 *dst = *src;
 157         }
 158         *dst = '\0';
 159         return ret;
 160 }
 161
 162 static void parse_pathspec_attr_match(struct pathspec_item *item, const char *value)
 163 {
 164         struct string_list_item *si;
 165         struct string_list list = STRING_LIST_INIT_DUP;
 166
 167         if (item->attr_check || item->attr_match)
 168                 die(_("Only one 'attr:' specification is allowed."));
 169
 170         if (!value || !*value)
 171                 die(_("attr spec must not be empty"));
 172
 173         string_list_split(&list, value, ' ', -1);
 174         string_list_remove_empty_items(&list, 0);
 175
 176         item->attr_check = attr_check_alloc();
 177         CALLOC_ARRAY(item->attr_match, list.nr);
 178
 179         for_each_string_list_item(si, &list) {
 180                 size_t attr_len;
 181                 char *attr_name;
 182                 const struct git_attr *a;
 183
 184                 int j = item->attr_match_nr++;
 185                 const char *attr = si->string;
 186                 struct attr_match *am = &item->attr_match[j];
 187
 188                 switch (*attr) {
 189                 case '!':
 190                         am->match_mode = MATCH_UNSPECIFIED;
 191                         attr++;
 192                         attr_len = strlen(attr);
 193                         break;
 194                 case '-':
 195                         am->match_mode = MATCH_UNSET;
 196                         attr++;
 197                         attr_len = strlen(attr);
 198                         break;
 199                 default:
 200                         attr_len = strcspn(attr, "=");
 201                         if (attr[attr_len] != '=')
 202                                 am->match_mode = MATCH_SET;
 203                         else {
 204                                 const char *v = &attr[attr_len + 1];
 205                                 am->match_mode = MATCH_VALUE;
 206                                 am->value = attr_value_unescape(v);
 207                         }
 208                         break;
 209                 }
 210
 211                 attr_name = xmemdupz(attr, attr_len);
 212                 a = git_attr(attr_name);
 213                 if (!a)
 214                         die(_("invalid attribute name %s"), attr_name);
 215
 216                 attr_check_append(item->attr_check, a);
 217
 218                 free(attr_name);
 219         }
 220
 221         if (item->attr_check->nr != item->attr_match_nr)
 222                 BUG("should have same number of entries");
 223
 224         string_list_clear(&list, 0);
 225 }
 226
 227 static inline int get_literal_global(void)
 228 {
 229         static int literal = -1;
 230
 231         if (literal < 0)
 232                 literal = git_env_bool(GIT_LITERAL_PATHSPECS_ENVIRONMENT, 0);
 233
 234         return literal;
 235 }
 236
 237 static inline int get_glob_global(void)
 238 {
 239         static int glob = -1;
 240
 241         if (glob < 0)
 242                 glob = git_env_bool(GIT_GLOB_PATHSPECS_ENVIRONMENT, 0);
 243
 244         return glob;
 245 }
 246
 247 static inline int get_noglob_global(void)
 248 {
 249         static int noglob = -1;
 250
 251         if (noglob < 0)
 252                 noglob = git_env_bool(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, 0);
 253
 254         return noglob;
 255 }
 256
 257 static inline int get_icase_global(void)
 258 {
 259         static int icase = -1;
 260
 261         if (icase < 0)
 262                 icase = git_env_bool(GIT_ICASE_PATHSPECS_ENVIRONMENT, 0);
 263
 264         return icase;
 265 }
 266
 267 static int get_global_magic(int element_magic)
 268 {
 269         int global_magic = 0;
 270
 271         if (get_literal_global())
 272                 global_magic |= PATHSPEC_LITERAL;
 273
 274         /* --glob-pathspec is overridden by :(literal) */
 275         if (get_glob_global() && !(element_magic & PATHSPEC_LITERAL))
 276                 global_magic |= PATHSPEC_GLOB;
 277
 278         if (get_glob_global() && get_noglob_global())
 279                 die(_("global 'glob' and 'noglob' pathspec settings are incompatible"));
 280
 281         if (get_icase_global())
 282                 global_magic |= PATHSPEC_ICASE;
 283
 284         if ((global_magic & PATHSPEC_LITERAL) &&
 285             (global_magic & ~PATHSPEC_LITERAL))
 286                 die(_("global 'literal' pathspec setting is incompatible "
 287                       "with all other global pathspec settings"));
 288
 289         /* --noglob-pathspec adds :(literal) _unless_ :(glob) is specified */
 290         if (get_noglob_global() && !(element_magic & PATHSPEC_GLOB))
 291                 global_magic |= PATHSPEC_LITERAL;
 292
 293         return global_magic;
 294 }
 295
 296 /*
 297  * Parse the pathspec element looking for long magic
 298  *
 299  * saves all magic in 'magic'
 300  * if prefix magic is used, save the prefix length in 'prefix_len'
 301  * returns the position in 'elem' after all magic has been parsed
 302  */
 303 static const char *parse_long_magic(unsigned *magic, int *prefix_len,
 304                                     struct pathspec_item *item,
 305                                     const char *elem)
 306 {
 307         const char *pos;
 308         const char *nextat;
 309
 310         for (pos = elem + 2; *pos && *pos != ')'; pos = nextat) {
 311                 size_t len = strcspn_escaped(pos, ",)");
 312                 int i;
 313
 314                 if (pos[len] == ',')
 315                         nextat = pos + len + 1; /* handle ',' */
 316                 else
 317                         nextat = pos + len; /* handle ')' and '\0' */
 318
 319                 if (!len)
 320                         continue;
 321
 322                 if (starts_with(pos, "prefix:")) {
 323                         char *endptr;
 324                         *prefix_len = strtol(pos + 7, &endptr, 10);
 325                         if (endptr - pos != len)
 326                                 die(_("invalid parameter for pathspec magic 'prefix'"));
 327                         continue;
 328                 }
 329
 330                 if (starts_with(pos, "attr:")) {
 331                         char *attr_body = xmemdupz(pos + 5, len - 5);
 332                         parse_pathspec_attr_match(item, attr_body);
 333                         *magic |= PATHSPEC_ATTR;
 334                         free(attr_body);
 335                         continue;
 336                 }
 337
 338                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 339                         if (strlen(pathspec_magic[i].name) == len &&
 340                             !strncmp(pathspec_magic[i].name, pos, len)) {
 341                                 *magic |= pathspec_magic[i].bit;
 342                                 break;
 343                         }
 344                 }
 345
 346                 if (ARRAY_SIZE(pathspec_magic) <= i)
 347                         die(_("Invalid pathspec magic '%.*s' in '%s'"),
 348                             (int) len, pos, elem);
 349         }
 350
 351         if (*pos != ')')
 352                 die(_("Missing ')' at the end of pathspec magic in '%s'"),
 353                     elem);
 354         pos++;
 355
 356         return pos;
 357 }
 358
 359 /*
 360  * Parse the pathspec element looking for short magic
 361  *
 362  * saves all magic in 'magic'
 363  * returns the position in 'elem' after all magic has been parsed
 364  */
 365 static const char *parse_short_magic(unsigned *magic, const char *elem)
 366 {
 367         const char *pos;
 368
 369         for (pos = elem + 1; *pos && *pos != ':'; pos++) {
 370                 char ch = *pos;
 371                 int i;
 372
 373                 /* Special case alias for '!' */
 374                 if (ch == '^') {
 375                         *magic |= PATHSPEC_EXCLUDE;
 376                         continue;
 377                 }
 378
 379                 if (!is_pathspec_magic(ch))
 380                         break;
 381
 382                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 383                         if (pathspec_magic[i].mnemonic == ch) {
 384                                 *magic |= pathspec_magic[i].bit;
 385                                 break;
 386                         }
 387                 }
 388
 389                 if (ARRAY_SIZE(pathspec_magic) <= i)
 390                         die(_("Unimplemented pathspec magic '%c' in '%s'"),
 391                             ch, elem);
 392         }
 393
 394         if (*pos == ':')
 395                 pos++;
 396
 397         return pos;
 398 }
 399
 400 static const char *parse_element_magic(unsigned *magic, int *prefix_len,
 401                                        struct pathspec_item *item,
 402                                        const char *elem)
 403 {
 404         if (elem[0] != ':' || get_literal_global())
 405                 return elem; /* nothing to do */
 406         else if (elem[1] == '(')
 407                 /* longhand */
 408                 return parse_long_magic(magic, prefix_len, item, elem);
 409         else
 410                 /* shorthand */
 411                 return parse_short_magic(magic, elem);
 412 }
 413
 414 /*
 415  * Perform the initialization of a pathspec_item based on a pathspec element.
 416  */
 417 static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 418                                const char *prefix, int prefixlen,
 419                                const char *elt)
 420 {
 421         unsigned magic = 0, element_magic = 0;
 422         const char *copyfrom = elt;
 423         char *match;
 424         int pathspec_prefix = -1;
 425
 426         item->attr_check = NULL;
 427         item->attr_match = NULL;
 428         item->attr_match_nr = 0;
 429
 430         /* PATHSPEC_LITERAL_PATH ignores magic */
 431         if (flags & PATHSPEC_LITERAL_PATH) {
 432                 magic = PATHSPEC_LITERAL;
 433         } else {
 434                 copyfrom = parse_element_magic(&element_magic,
 435                                                &pathspec_prefix,
 436                                                item,
 437                                                elt);
 438                 magic |= element_magic;
 439                 magic |= get_global_magic(element_magic);
 440         }
 441
 442         item->magic = magic;
 443
 444         if (pathspec_prefix >= 0 &&
 445             (prefixlen || (prefix && *prefix)))
 446                 BUG("'prefix' magic is supposed to be used at worktree's root");
 447
 448         if ((magic & PATHSPEC_LITERAL) && (magic & PATHSPEC_GLOB))
 449                 die(_("%s: 'literal' and 'glob' are incompatible"), elt);
 450
 451         /* Create match string which will be used for pathspec matching */
 452         if (pathspec_prefix >= 0) {
 453                 match = xstrdup(copyfrom);
 454                 prefixlen = pathspec_prefix;
 455         } else if (magic & PATHSPEC_FROMTOP) {
 456                 match = xstrdup(copyfrom);
 457                 prefixlen = 0;
 458         } else {
 459                 match = prefix_path_gently(prefix, prefixlen,
 460                                            &prefixlen, copyfrom);
 461                 if (!match) {
 462                         const char *hint_path = get_git_work_tree();
 463                         if (!hint_path)
 464                                 hint_path = get_git_dir();
 465                         die(_("%s: '%s' is outside repository at '%s'"), elt,
 466                             copyfrom, absolute_path(hint_path));
 467                 }
 468         }
 469
 470         item->match = match;
 471         item->len = strlen(item->match);
 472         item->prefix = prefixlen;
 473
 474         /*
 475          * Prefix the pathspec (keep all magic) and assign to
 476          * original. Useful for passing to another command.
 477          */
 478         if ((flags & PATHSPEC_PREFIX_ORIGIN) &&
 479             !get_literal_global()) {
 480                 struct strbuf sb = STRBUF_INIT;
 481
 482                 /* Preserve the actual prefix length of each pattern */
 483                 prefix_magic(&sb, prefixlen, element_magic);
 484
 485                 strbuf_addstr(&sb, match);
 486                 item->original = strbuf_detach(&sb, NULL);
 487         } else {
 488                 item->original = xstrdup(elt);
 489         }
 490
 491         if (magic & PATHSPEC_LITERAL) {
 492                 item->nowildcard_len = item->len;
 493         } else {
 494                 item->nowildcard_len = simple_length(item->match);
 495                 if (item->nowildcard_len < prefixlen)
 496                         item->nowildcard_len = prefixlen;
 497         }
 498
 499         item->flags = 0;
 500         if (magic & PATHSPEC_GLOB) {
 501                 /*
 502                  * FIXME: should we enable ONESTAR in _GLOB for
 503                  * pattern "* * / * . c"?
 504                  */
 505         } else {
 506                 if (item->nowildcard_len < item->len &&
 507                     item->match[item->nowildcard_len] == '*' &&
 508                     no_wildcard(item->match + item->nowildcard_len + 1))
 509                         item->flags |= PATHSPEC_ONESTAR;
 510         }
 511
 512         /* sanity checks, pathspec matchers assume these are sane */
 513         if (item->nowildcard_len > item->len ||
 514             item->prefix         > item->len) {
 515                 BUG("error initializing pathspec_item");
 516         }
 517 }
 518
 519 static int pathspec_item_cmp(const void *a_, const void *b_)
 520 {
 521         struct pathspec_item *a, *b;
 522
 523         a = (struct pathspec_item *)a_;
 524         b = (struct pathspec_item *)b_;
 525         return strcmp(a->match, b->match);
 526 }
 527
 528 static void NORETURN unsupported_magic(const char *pattern,
 529                                        unsigned magic)
 530 {
 531         struct strbuf sb = STRBUF_INIT;
 532         int i;
 533         for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 534                 const struct pathspec_magic *m = pathspec_magic + i;
 535                 if (!(magic & m->bit))
 536                         continue;
 537                 if (sb.len)
 538                         strbuf_addstr(&sb, ", ");
 539
 540                 if (m->mnemonic)
 541                         strbuf_addf(&sb, _("'%s' (mnemonic: '%c')"),
 542                                     m->name, m->mnemonic);
 543                 else
 544                         strbuf_addf(&sb, "'%s'", m->name);
 545         }
 546         /*
 547          * We may want to substitute "this command" with a command
 548          * name. E.g. when "git add -p" or "git add -i" dies when running
 549          * "checkout -p"
 550          */
 551         die(_("%s: pathspec magic not supported by this command: %s"),
 552             pattern, sb.buf);
 553 }
 554
 555 void parse_pathspec(struct pathspec *pathspec,
 556                     unsigned magic_mask, unsigned flags,
 557                     const char *prefix, const char **argv)
 558 {
 559         struct pathspec_item *item;
 560         const char *entry = argv ? *argv : NULL;
 561         int i, n, prefixlen, nr_exclude = 0;
 562
 563         memset(pathspec, 0, sizeof(*pathspec));
 564
 565         if (flags & PATHSPEC_MAXDEPTH_VALID)
 566                 pathspec->magic |= PATHSPEC_MAXDEPTH;
 567
 568         /* No arguments, no prefix -> no pathspec */
 569         if (!entry && !prefix)
 570                 return;
 571
 572         if ((flags & PATHSPEC_PREFER_CWD) &&
 573             (flags & PATHSPEC_PREFER_FULL))
 574                 BUG("PATHSPEC_PREFER_CWD and PATHSPEC_PREFER_FULL are incompatible");
 575
 576         /* No arguments with prefix -> prefix pathspec */
 577         if (!entry) {
 578                 if (flags & PATHSPEC_PREFER_FULL)
 579                         return;
 580
 581                 if (!(flags & PATHSPEC_PREFER_CWD))
 582                         BUG("PATHSPEC_PREFER_CWD requires arguments");
 583
 584                 pathspec->items = CALLOC_ARRAY(item, 1);
 585                 item->match = xstrdup(prefix);
 586                 item->original = xstrdup(prefix);
 587                 item->nowildcard_len = item->len = strlen(prefix);
 588                 item->prefix = item->len;
 589                 pathspec->nr = 1;
 590                 return;
 591         }
 592
 593         n = 0;
 594         while (argv[n]) {
 595                 if (*argv[n] == '\0')
 596                         die("empty string is not a valid pathspec. "
 597                                   "please use . instead if you meant to match all paths");
 598                 n++;
 599         }
 600
 601         pathspec->nr = n;
 602         ALLOC_ARRAY(pathspec->items, n + 1);
 603         item = pathspec->items;
 604         prefixlen = prefix ? strlen(prefix) : 0;
 605
 606         for (i = 0; i < n; i++) {
 607                 entry = argv[i];
 608
 609                 init_pathspec_item(item + i, flags, prefix, prefixlen, entry);
 610
 611                 if (item[i].magic & PATHSPEC_EXCLUDE)
 612                         nr_exclude++;
 613                 if (item[i].magic & magic_mask)
 614                         unsupported_magic(entry, item[i].magic & magic_mask);
 615
 616                 if ((flags & PATHSPEC_SYMLINK_LEADING_PATH) &&
 617                     has_symlink_leading_path(item[i].match, item[i].len)) {
 618                         die(_("pathspec '%s' is beyond a symbolic link"), entry);
 619                 }
 620
 621                 if (item[i].nowildcard_len < item[i].len)
 622                         pathspec->has_wildcard = 1;
 623                 pathspec->magic |= item[i].magic;
 624         }
 625
 626         /*
 627          * If everything is an exclude pattern, add one positive pattern
 628          * that matches everything. We allocated an extra one for this.
 629          */
 630         if (nr_exclude == n) {
 631                 int plen = (!(flags & PATHSPEC_PREFER_CWD)) ? 0 : prefixlen;
 632                 init_pathspec_item(item + n, 0, prefix, plen, ".");
 633                 pathspec->nr++;
 634         }
 635
 636         if (pathspec->magic & PATHSPEC_MAXDEPTH) {
 637                 if (flags & PATHSPEC_KEEP_ORDER)
 638                         BUG("PATHSPEC_MAXDEPTH_VALID and PATHSPEC_KEEP_ORDER are incompatible");
 639                 QSORT(pathspec->items, pathspec->nr, pathspec_item_cmp);
 640         }
 641 }
 642
 643 void parse_pathspec_file(struct pathspec *pathspec, unsigned magic_mask,
 644                          unsigned flags, const char *prefix,
 645                          const char *file, int nul_term_line)
 646 {
 647         struct strvec parsed_file = STRVEC_INIT;
 648         strbuf_getline_fn getline_fn = nul_term_line ? strbuf_getline_nul :
 649                                                        strbuf_getline;
 650         struct strbuf buf = STRBUF_INIT;
 651         struct strbuf unquoted = STRBUF_INIT;
 652         FILE *in;
 653
 654         if (!strcmp(file, "-"))
 655                 in = stdin;
 656         else
 657                 in = xfopen(file, "r");
 658
 659         while (getline_fn(&buf, in) != EOF) {
 660                 if (!nul_term_line && buf.buf[0] == '"') {
 661                         strbuf_reset(&unquoted);
 662                         if (unquote_c_style(&unquoted, buf.buf, NULL))
 663                                 die(_("line is badly quoted: %s"), buf.buf);
 664                         strbuf_swap(&buf, &unquoted);
 665                 }
 666                 strvec_push(&parsed_file, buf.buf);
 667                 strbuf_reset(&buf);
 668         }
 669
 670         strbuf_release(&unquoted);
 671         strbuf_release(&buf);
 672         if (in != stdin)
 673                 fclose(in);
 674
 675         parse_pathspec(pathspec, magic_mask, flags, prefix, parsed_file.v);
 676         strvec_clear(&parsed_file);
 677 }
 678
 679 void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
 680 {
 681         int i, j;
 682
 683         *dst = *src;
 684         DUP_ARRAY(dst->items, src->items, dst->nr);
 685
 686         for (i = 0; i < dst->nr; i++) {
 687                 struct pathspec_item *d = &dst->items[i];
 688                 struct pathspec_item *s = &src->items[i];
 689
 690                 d->match = xstrdup(s->match);
 691                 d->original = xstrdup(s->original);
 692
 693                 DUP_ARRAY(d->attr_match, s->attr_match, d->attr_match_nr);
 694                 for (j = 0; j < d->attr_match_nr; j++) {
 695                         const char *value = s->attr_match[j].value;
 696                         d->attr_match[j].value = xstrdup_or_null(value);
 697                 }
 698
 699                 d->attr_check = attr_check_dup(s->attr_check);
 700         }
 701 }
 702
 703 void clear_pathspec(struct pathspec *pathspec)
 704 {
 705         int i, j;
 706
 707         for (i = 0; i < pathspec->nr; i++) {
 708                 free(pathspec->items[i].match);
 709                 free(pathspec->items[i].original);
 710
 711                 for (j = 0; j < pathspec->items[i].attr_match_nr; j++)
 712                         free(pathspec->items[i].attr_match[j].value);
 713                 free(pathspec->items[i].attr_match);
 714
 715                 if (pathspec->items[i].attr_check)
 716                         attr_check_free(pathspec->items[i].attr_check);
 717         }
 718
 719         FREE_AND_NULL(pathspec->items);
 720         pathspec->nr = 0;
 721 }
 722
 723 int match_pathspec_attrs(struct index_state *istate,
 724                          const char *name, int namelen,
 725                          const struct pathspec_item *item)
 726 {
 727         int i;
 728         char *to_free = NULL;
 729
 730         if (name[namelen])
 731                 name = to_free = xmemdupz(name, namelen);
 732
 733         git_check_attr(istate, NULL, name, item->attr_check);
 734
 735         free(to_free);
 736
 737         for (i = 0; i < item->attr_match_nr; i++) {
 738                 const char *value;
 739                 int matched;
 740                 enum attr_match_mode match_mode;
 741
 742                 value = item->attr_check->items[i].value;
 743                 match_mode = item->attr_match[i].match_mode;
 744
 745                 if (ATTR_TRUE(value))
 746                         matched = (match_mode == MATCH_SET);
 747                 else if (ATTR_FALSE(value))
 748                         matched = (match_mode == MATCH_UNSET);
 749                 else if (ATTR_UNSET(value))
 750                         matched = (match_mode == MATCH_UNSPECIFIED);
 751                 else
 752                         matched = (match_mode == MATCH_VALUE &&
 753                                    !strcmp(item->attr_match[i].value, value));
 754                 if (!matched)
 755                         return 0;
 756         }
 757
 758         return 1;
 759 }
 760
 761 int pathspec_needs_expanded_index(struct index_state *istate,
 762                                   const struct pathspec *pathspec)
 763 {
 764         unsigned int i, pos;
 765         int res = 0;
 766         char *skip_worktree_seen = NULL;
 767
 768         /*
 769          * If index is not sparse, no index expansion is needed.
 770          */
 771         if (!istate->sparse_index)
 772                 return 0;
 773
 774         /*
 775          * When using a magic pathspec, assume for the sake of simplicity that
 776          * the index needs to be expanded to match all matchable files.
 777          */
 778         if (pathspec->magic)
 779                 return 1;
 780
 781         for (i = 0; i < pathspec->nr; i++) {
 782                 struct pathspec_item item = pathspec->items[i];
 783
 784                 /*
 785                  * If the pathspec item has a wildcard, the index should be expanded
 786                  * if the pathspec has the possibility of matching a subset of entries inside
 787                  * of a sparse directory (but not the entire directory).
 788                  *
 789                  * If the pathspec item is a literal path, the index only needs to be expanded
 790                  * if a) the pathspec isn't in the sparse checkout cone (to make sure we don't
 791                  * expand for in-cone files) and b) it doesn't match any sparse directories
 792                  * (since we can reset whole sparse directories without expanding them).
 793                  */
 794                 if (item.nowildcard_len < item.len) {
 795                         /*
 796                          * Special case: if the pattern is a path inside the cone
 797                          * followed by only wildcards, the pattern cannot match
 798                          * partial sparse directories, so we know we don't need to
 799                          * expand the index.
 800                          *
 801                          * Examples:
 802                          * - in-cone/foo***: doesn't need expanded index
 803                          * - not-in-cone/bar*: may need expanded index
 804                          * - **.c: may need expanded index
 805                          */
 806                         if (strspn(item.original + item.nowildcard_len, "*") == item.len - item.nowildcard_len &&
 807                             path_in_cone_mode_sparse_checkout(item.original, istate))
 808                                 continue;
 809
 810                         for (pos = 0; pos < istate->cache_nr; pos++) {
 811                                 struct cache_entry *ce = istate->cache[pos];
 812
 813                                 if (!S_ISSPARSEDIR(ce->ce_mode))
 814                                         continue;
 815
 816                                 /*
 817                                  * If the pre-wildcard length is longer than the sparse
 818                                  * directory name and the sparse directory is the first
 819                                  * component of the pathspec, need to expand the index.
 820                                  */
 821                                 if (item.nowildcard_len > ce_namelen(ce) &&
 822                                     !strncmp(item.original, ce->name, ce_namelen(ce))) {
 823                                         res = 1;
 824                                         break;
 825                                 }
 826
 827                                 /*
 828                                  * If the pre-wildcard length is shorter than the sparse
 829                                  * directory and the pathspec does not match the whole
 830                                  * directory, need to expand the index.
 831                                  */
 832                                 if (!strncmp(item.original, ce->name, item.nowildcard_len) &&
 833                                     wildmatch(item.original, ce->name, 0)) {
 834                                         res = 1;
 835                                         break;
 836                                 }
 837                         }
 838                 } else if (!path_in_cone_mode_sparse_checkout(item.original, istate) &&
 839                            !matches_skip_worktree(pathspec, i, &skip_worktree_seen))
 840                         res = 1;
 841
 842                 if (res > 0)
 843                         break;
 844         }
 845
 846         free(skip_worktree_seen);
 847         return res;
 848 }