pathspec.c

   1 #include "cache.h"
   2 #include "abspath.h"
   3 #include "config.h"
   4 #include "dir.h"
   5 #include "environment.h"
   6 #include "gettext.h"
   7 #include "pathspec.h"
   8 #include "attr.h"
   9 #include "repository.h"
  10 #include "setup.h"
  11 #include "strvec.h"
  12 #include "symlinks.h"
  13 #include "quote.h"
  14
  15 /*
  16  * Finds which of the given pathspecs match items in the index.
  17  *
  18  * For each pathspec, sets the corresponding entry in the seen[] array
  19  * (which should be specs items long, i.e. the same size as pathspec)
  20  * to the nature of the "closest" (i.e. most specific) match found for
  21  * that pathspec in the index, if it was a closer type of match than
  22  * the existing entry.  As an optimization, matching is skipped
  23  * altogether if seen[] already only contains non-zero entries.
  24  *
  25  * If seen[] has not already been written to, it may make sense
  26  * to use find_pathspecs_matching_against_index() instead.
  27  */
  28 void add_pathspec_matches_against_index(const struct pathspec *pathspec,
  29                                         struct index_state *istate,
  30                                         char *seen,
  31                                         enum ps_skip_worktree_action sw_action)
  32 {
  33         int num_unmatched = 0, i;
  34
  35         /*
  36          * Since we are walking the index as if we were walking the directory,
  37          * we have to mark the matched pathspec as seen; otherwise we will
  38          * mistakenly think that the user gave a pathspec that did not match
  39          * anything.
  40          */
  41         for (i = 0; i < pathspec->nr; i++)
  42                 if (!seen[i])
  43                         num_unmatched++;
  44         if (!num_unmatched)
  45                 return;
  46         for (i = 0; i < istate->cache_nr; i++) {
  47                 const struct cache_entry *ce = istate->cache[i];
  48                 if (sw_action == PS_IGNORE_SKIP_WORKTREE &&
  49                     (ce_skip_worktree(ce) || !path_in_sparse_checkout(ce->name, istate)))
  50                         continue;
  51                 ce_path_match(istate, ce, pathspec, seen);
  52         }
  53 }
  54
  55 /*
  56  * Finds which of the given pathspecs match items in the index.
  57  *
  58  * This is a one-shot wrapper around add_pathspec_matches_against_index()
  59  * which allocates, populates, and returns a seen[] array indicating the
  60  * nature of the "closest" (i.e. most specific) matches which each of the
  61  * given pathspecs achieves against all items in the index.
  62  */
  63 char *find_pathspecs_matching_against_index(const struct pathspec *pathspec,
  64                                             struct index_state *istate,
  65                                             enum ps_skip_worktree_action sw_action)
  66 {
  67         char *seen = xcalloc(pathspec->nr, 1);
  68         add_pathspec_matches_against_index(pathspec, istate, seen, sw_action);
  69         return seen;
  70 }
  71
  72 char *find_pathspecs_matching_skip_worktree(const struct pathspec *pathspec)
  73 {
  74         struct index_state *istate = the_repository->index;
  75         char *seen = xcalloc(pathspec->nr, 1);
  76         int i;
  77
  78         for (i = 0; i < istate->cache_nr; i++) {
  79                 struct cache_entry *ce = istate->cache[i];
  80                 if (ce_skip_worktree(ce) || !path_in_sparse_checkout(ce->name, istate))
  81                     ce_path_match(istate, ce, pathspec, seen);
  82         }
  83
  84         return seen;
  85 }
  86
  87 /*
  88  * Magic pathspec
  89  *
  90  * Possible future magic semantics include stuff like:
  91  *
  92  *      { PATHSPEC_RECURSIVE, '*', "recursive" },
  93  *      { PATHSPEC_REGEXP, '\0', "regexp" },
  94  *
  95  */
  96
  97 static struct pathspec_magic {
  98         unsigned bit;
  99         char mnemonic; /* this cannot be ':'! */
 100         const char *name;
 101 } pathspec_magic[] = {
 102         { PATHSPEC_FROMTOP,  '/', "top" },
 103         { PATHSPEC_LITERAL, '\0', "literal" },
 104         { PATHSPEC_GLOB,    '\0', "glob" },
 105         { PATHSPEC_ICASE,   '\0', "icase" },
 106         { PATHSPEC_EXCLUDE,  '!', "exclude" },
 107         { PATHSPEC_ATTR,    '\0', "attr" },
 108 };
 109
 110 static void prefix_magic(struct strbuf *sb, int prefixlen, unsigned magic)
 111 {
 112         int i;
 113         strbuf_addstr(sb, ":(");
 114         for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
 115                 if (magic & pathspec_magic[i].bit) {
 116                         if (sb->buf[sb->len - 1] != '(')
 117                                 strbuf_addch(sb, ',');
 118                         strbuf_addstr(sb, pathspec_magic[i].name);
 119                 }
 120         strbuf_addf(sb, ",prefix:%d)", prefixlen);
 121 }
 122
 123 static size_t strcspn_escaped(const char *s, const char *stop)
 124 {
 125         const char *i;
 126
 127         for (i = s; *i; i++) {
 128                 /* skip the escaped character */
 129                 if (i[0] == '\\' && i[1]) {
 130                         i++;
 131                         continue;
 132                 }
 133
 134                 if (strchr(stop, *i))
 135                         break;
 136         }
 137         return i - s;
 138 }
 139
 140 static inline int invalid_value_char(const char ch)
 141 {
 142         if (isalnum(ch) || strchr(",-_", ch))
 143                 return 0;
 144         return -1;
 145 }
 146
 147 static char *attr_value_unescape(const char *value)
 148 {
 149         const char *src;
 150         char *dst, *ret;
 151
 152         ret = xmallocz(strlen(value));
 153         for (src = value, dst = ret; *src; src++, dst++) {
 154                 if (*src == '\\') {
 155                         if (!src[1])
 156                                 die(_("Escape character '\\' not allowed as "
 157                                       "last character in attr value"));
 158                         src++;
 159                 }
 160                 if (invalid_value_char(*src))
 161                         die("cannot use '%c' for value matching", *src);
 162                 *dst = *src;
 163         }
 164         *dst = '\0';
 165         return ret;
 166 }
 167
 168 static void parse_pathspec_attr_match(struct pathspec_item *item, const char *value)
 169 {
 170         struct string_list_item *si;
 171         struct string_list list = STRING_LIST_INIT_DUP;
 172
 173         if (item->attr_check || item->attr_match)
 174                 die(_("Only one 'attr:' specification is allowed."));
 175
 176         if (!value || !*value)
 177                 die(_("attr spec must not be empty"));
 178
 179         string_list_split(&list, value, ' ', -1);
 180         string_list_remove_empty_items(&list, 0);
 181
 182         item->attr_check = attr_check_alloc();
 183         CALLOC_ARRAY(item->attr_match, list.nr);
 184
 185         for_each_string_list_item(si, &list) {
 186                 size_t attr_len;
 187                 char *attr_name;
 188                 const struct git_attr *a;
 189
 190                 int j = item->attr_match_nr++;
 191                 const char *attr = si->string;
 192                 struct attr_match *am = &item->attr_match[j];
 193
 194                 switch (*attr) {
 195                 case '!':
 196                         am->match_mode = MATCH_UNSPECIFIED;
 197                         attr++;
 198                         attr_len = strlen(attr);
 199                         break;
 200                 case '-':
 201                         am->match_mode = MATCH_UNSET;
 202                         attr++;
 203                         attr_len = strlen(attr);
 204                         break;
 205                 default:
 206                         attr_len = strcspn(attr, "=");
 207                         if (attr[attr_len] != '=')
 208                                 am->match_mode = MATCH_SET;
 209                         else {
 210                                 const char *v = &attr[attr_len + 1];
 211                                 am->match_mode = MATCH_VALUE;
 212                                 am->value = attr_value_unescape(v);
 213                         }
 214                         break;
 215                 }
 216
 217                 attr_name = xmemdupz(attr, attr_len);
 218                 a = git_attr(attr_name);
 219                 if (!a)
 220                         die(_("invalid attribute name %s"), attr_name);
 221
 222                 attr_check_append(item->attr_check, a);
 223
 224                 free(attr_name);
 225         }
 226
 227         if (item->attr_check->nr != item->attr_match_nr)
 228                 BUG("should have same number of entries");
 229
 230         string_list_clear(&list, 0);
 231 }
 232
 233 static inline int get_literal_global(void)
 234 {
 235         static int literal = -1;
 236
 237         if (literal < 0)
 238                 literal = git_env_bool(GIT_LITERAL_PATHSPECS_ENVIRONMENT, 0);
 239
 240         return literal;
 241 }
 242
 243 static inline int get_glob_global(void)
 244 {
 245         static int glob = -1;
 246
 247         if (glob < 0)
 248                 glob = git_env_bool(GIT_GLOB_PATHSPECS_ENVIRONMENT, 0);
 249
 250         return glob;
 251 }
 252
 253 static inline int get_noglob_global(void)
 254 {
 255         static int noglob = -1;
 256
 257         if (noglob < 0)
 258                 noglob = git_env_bool(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, 0);
 259
 260         return noglob;
 261 }
 262
 263 static inline int get_icase_global(void)
 264 {
 265         static int icase = -1;
 266
 267         if (icase < 0)
 268                 icase = git_env_bool(GIT_ICASE_PATHSPECS_ENVIRONMENT, 0);
 269
 270         return icase;
 271 }
 272
 273 static int get_global_magic(int element_magic)
 274 {
 275         int global_magic = 0;
 276
 277         if (get_literal_global())
 278                 global_magic |= PATHSPEC_LITERAL;
 279
 280         /* --glob-pathspec is overridden by :(literal) */
 281         if (get_glob_global() && !(element_magic & PATHSPEC_LITERAL))
 282                 global_magic |= PATHSPEC_GLOB;
 283
 284         if (get_glob_global() && get_noglob_global())
 285                 die(_("global 'glob' and 'noglob' pathspec settings are incompatible"));
 286
 287         if (get_icase_global())
 288                 global_magic |= PATHSPEC_ICASE;
 289
 290         if ((global_magic & PATHSPEC_LITERAL) &&
 291             (global_magic & ~PATHSPEC_LITERAL))
 292                 die(_("global 'literal' pathspec setting is incompatible "
 293                       "with all other global pathspec settings"));
 294
 295         /* --noglob-pathspec adds :(literal) _unless_ :(glob) is specified */
 296         if (get_noglob_global() && !(element_magic & PATHSPEC_GLOB))
 297                 global_magic |= PATHSPEC_LITERAL;
 298
 299         return global_magic;
 300 }
 301
 302 /*
 303  * Parse the pathspec element looking for long magic
 304  *
 305  * saves all magic in 'magic'
 306  * if prefix magic is used, save the prefix length in 'prefix_len'
 307  * returns the position in 'elem' after all magic has been parsed
 308  */
 309 static const char *parse_long_magic(unsigned *magic, int *prefix_len,
 310                                     struct pathspec_item *item,
 311                                     const char *elem)
 312 {
 313         const char *pos;
 314         const char *nextat;
 315
 316         for (pos = elem + 2; *pos && *pos != ')'; pos = nextat) {
 317                 size_t len = strcspn_escaped(pos, ",)");
 318                 int i;
 319
 320                 if (pos[len] == ',')
 321                         nextat = pos + len + 1; /* handle ',' */
 322                 else
 323                         nextat = pos + len; /* handle ')' and '\0' */
 324
 325                 if (!len)
 326                         continue;
 327
 328                 if (starts_with(pos, "prefix:")) {
 329                         char *endptr;
 330                         *prefix_len = strtol(pos + 7, &endptr, 10);
 331                         if (endptr - pos != len)
 332                                 die(_("invalid parameter for pathspec magic 'prefix'"));
 333                         continue;
 334                 }
 335
 336                 if (starts_with(pos, "attr:")) {
 337                         char *attr_body = xmemdupz(pos + 5, len - 5);
 338                         parse_pathspec_attr_match(item, attr_body);
 339                         *magic |= PATHSPEC_ATTR;
 340                         free(attr_body);
 341                         continue;
 342                 }
 343
 344                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 345                         if (strlen(pathspec_magic[i].name) == len &&
 346                             !strncmp(pathspec_magic[i].name, pos, len)) {
 347                                 *magic |= pathspec_magic[i].bit;
 348                                 break;
 349                         }
 350                 }
 351
 352                 if (ARRAY_SIZE(pathspec_magic) <= i)
 353                         die(_("Invalid pathspec magic '%.*s' in '%s'"),
 354                             (int) len, pos, elem);
 355         }
 356
 357         if (*pos != ')')
 358                 die(_("Missing ')' at the end of pathspec magic in '%s'"),
 359                     elem);
 360         pos++;
 361
 362         return pos;
 363 }
 364
 365 /*
 366  * Parse the pathspec element looking for short magic
 367  *
 368  * saves all magic in 'magic'
 369  * returns the position in 'elem' after all magic has been parsed
 370  */
 371 static const char *parse_short_magic(unsigned *magic, const char *elem)
 372 {
 373         const char *pos;
 374
 375         for (pos = elem + 1; *pos && *pos != ':'; pos++) {
 376                 char ch = *pos;
 377                 int i;
 378
 379                 /* Special case alias for '!' */
 380                 if (ch == '^') {
 381                         *magic |= PATHSPEC_EXCLUDE;
 382                         continue;
 383                 }
 384
 385                 if (!is_pathspec_magic(ch))
 386                         break;
 387
 388                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 389                         if (pathspec_magic[i].mnemonic == ch) {
 390                                 *magic |= pathspec_magic[i].bit;
 391                                 break;
 392                         }
 393                 }
 394
 395                 if (ARRAY_SIZE(pathspec_magic) <= i)
 396                         die(_("Unimplemented pathspec magic '%c' in '%s'"),
 397                             ch, elem);
 398         }
 399
 400         if (*pos == ':')
 401                 pos++;
 402
 403         return pos;
 404 }
 405
 406 static const char *parse_element_magic(unsigned *magic, int *prefix_len,
 407                                        struct pathspec_item *item,
 408                                        const char *elem)
 409 {
 410         if (elem[0] != ':' || get_literal_global())
 411                 return elem; /* nothing to do */
 412         else if (elem[1] == '(')
 413                 /* longhand */
 414                 return parse_long_magic(magic, prefix_len, item, elem);
 415         else
 416                 /* shorthand */
 417                 return parse_short_magic(magic, elem);
 418 }
 419
 420 /*
 421  * Perform the initialization of a pathspec_item based on a pathspec element.
 422  */
 423 static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 424                                const char *prefix, int prefixlen,
 425                                const char *elt)
 426 {
 427         unsigned magic = 0, element_magic = 0;
 428         const char *copyfrom = elt;
 429         char *match;
 430         int pathspec_prefix = -1;
 431
 432         item->attr_check = NULL;
 433         item->attr_match = NULL;
 434         item->attr_match_nr = 0;
 435
 436         /* PATHSPEC_LITERAL_PATH ignores magic */
 437         if (flags & PATHSPEC_LITERAL_PATH) {
 438                 magic = PATHSPEC_LITERAL;
 439         } else {
 440                 copyfrom = parse_element_magic(&element_magic,
 441                                                &pathspec_prefix,
 442                                                item,
 443                                                elt);
 444                 magic |= element_magic;
 445                 magic |= get_global_magic(element_magic);
 446         }
 447
 448         item->magic = magic;
 449
 450         if (pathspec_prefix >= 0 &&
 451             (prefixlen || (prefix && *prefix)))
 452                 BUG("'prefix' magic is supposed to be used at worktree's root");
 453
 454         if ((magic & PATHSPEC_LITERAL) && (magic & PATHSPEC_GLOB))
 455                 die(_("%s: 'literal' and 'glob' are incompatible"), elt);
 456
 457         /* Create match string which will be used for pathspec matching */
 458         if (pathspec_prefix >= 0) {
 459                 match = xstrdup(copyfrom);
 460                 prefixlen = pathspec_prefix;
 461         } else if (magic & PATHSPEC_FROMTOP) {
 462                 match = xstrdup(copyfrom);
 463                 prefixlen = 0;
 464         } else {
 465                 match = prefix_path_gently(prefix, prefixlen,
 466                                            &prefixlen, copyfrom);
 467                 if (!match) {
 468                         const char *hint_path = get_git_work_tree();
 469                         if (!hint_path)
 470                                 hint_path = get_git_dir();
 471                         die(_("%s: '%s' is outside repository at '%s'"), elt,
 472                             copyfrom, absolute_path(hint_path));
 473                 }
 474         }
 475
 476         item->match = match;
 477         item->len = strlen(item->match);
 478         item->prefix = prefixlen;
 479
 480         /*
 481          * Prefix the pathspec (keep all magic) and assign to
 482          * original. Useful for passing to another command.
 483          */
 484         if ((flags & PATHSPEC_PREFIX_ORIGIN) &&
 485             !get_literal_global()) {
 486                 struct strbuf sb = STRBUF_INIT;
 487
 488                 /* Preserve the actual prefix length of each pattern */
 489                 prefix_magic(&sb, prefixlen, element_magic);
 490
 491                 strbuf_addstr(&sb, match);
 492                 item->original = strbuf_detach(&sb, NULL);
 493         } else {
 494                 item->original = xstrdup(elt);
 495         }
 496
 497         if (magic & PATHSPEC_LITERAL) {
 498                 item->nowildcard_len = item->len;
 499         } else {
 500                 item->nowildcard_len = simple_length(item->match);
 501                 if (item->nowildcard_len < prefixlen)
 502                         item->nowildcard_len = prefixlen;
 503         }
 504
 505         item->flags = 0;
 506         if (magic & PATHSPEC_GLOB) {
 507                 /*
 508                  * FIXME: should we enable ONESTAR in _GLOB for
 509                  * pattern "* * / * . c"?
 510                  */
 511         } else {
 512                 if (item->nowildcard_len < item->len &&
 513                     item->match[item->nowildcard_len] == '*' &&
 514                     no_wildcard(item->match + item->nowildcard_len + 1))
 515                         item->flags |= PATHSPEC_ONESTAR;
 516         }
 517
 518         /* sanity checks, pathspec matchers assume these are sane */
 519         if (item->nowildcard_len > item->len ||
 520             item->prefix         > item->len) {
 521                 BUG("error initializing pathspec_item");
 522         }
 523 }
 524
 525 static int pathspec_item_cmp(const void *a_, const void *b_)
 526 {
 527         struct pathspec_item *a, *b;
 528
 529         a = (struct pathspec_item *)a_;
 530         b = (struct pathspec_item *)b_;
 531         return strcmp(a->match, b->match);
 532 }
 533
 534 static void NORETURN unsupported_magic(const char *pattern,
 535                                        unsigned magic)
 536 {
 537         struct strbuf sb = STRBUF_INIT;
 538         int i;
 539         for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 540                 const struct pathspec_magic *m = pathspec_magic + i;
 541                 if (!(magic & m->bit))
 542                         continue;
 543                 if (sb.len)
 544                         strbuf_addstr(&sb, ", ");
 545
 546                 if (m->mnemonic)
 547                         strbuf_addf(&sb, _("'%s' (mnemonic: '%c')"),
 548                                     m->name, m->mnemonic);
 549                 else
 550                         strbuf_addf(&sb, "'%s'", m->name);
 551         }
 552         /*
 553          * We may want to substitute "this command" with a command
 554          * name. E.g. when "git add -p" or "git add -i" dies when running
 555          * "checkout -p"
 556          */
 557         die(_("%s: pathspec magic not supported by this command: %s"),
 558             pattern, sb.buf);
 559 }
 560
 561 void parse_pathspec(struct pathspec *pathspec,
 562                     unsigned magic_mask, unsigned flags,
 563                     const char *prefix, const char **argv)
 564 {
 565         struct pathspec_item *item;
 566         const char *entry = argv ? *argv : NULL;
 567         int i, n, prefixlen, nr_exclude = 0;
 568
 569         memset(pathspec, 0, sizeof(*pathspec));
 570
 571         if (flags & PATHSPEC_MAXDEPTH_VALID)
 572                 pathspec->magic |= PATHSPEC_MAXDEPTH;
 573
 574         /* No arguments, no prefix -> no pathspec */
 575         if (!entry && !prefix)
 576                 return;
 577
 578         if ((flags & PATHSPEC_PREFER_CWD) &&
 579             (flags & PATHSPEC_PREFER_FULL))
 580                 BUG("PATHSPEC_PREFER_CWD and PATHSPEC_PREFER_FULL are incompatible");
 581
 582         /* No arguments with prefix -> prefix pathspec */
 583         if (!entry) {
 584                 if (flags & PATHSPEC_PREFER_FULL)
 585                         return;
 586
 587                 if (!(flags & PATHSPEC_PREFER_CWD))
 588                         BUG("PATHSPEC_PREFER_CWD requires arguments");
 589
 590                 pathspec->items = CALLOC_ARRAY(item, 1);
 591                 item->match = xstrdup(prefix);
 592                 item->original = xstrdup(prefix);
 593                 item->nowildcard_len = item->len = strlen(prefix);
 594                 item->prefix = item->len;
 595                 pathspec->nr = 1;
 596                 return;
 597         }
 598
 599         n = 0;
 600         while (argv[n]) {
 601                 if (*argv[n] == '\0')
 602                         die("empty string is not a valid pathspec. "
 603                                   "please use . instead if you meant to match all paths");
 604                 n++;
 605         }
 606
 607         pathspec->nr = n;
 608         ALLOC_ARRAY(pathspec->items, n + 1);
 609         item = pathspec->items;
 610         prefixlen = prefix ? strlen(prefix) : 0;
 611
 612         for (i = 0; i < n; i++) {
 613                 entry = argv[i];
 614
 615                 init_pathspec_item(item + i, flags, prefix, prefixlen, entry);
 616
 617                 if (item[i].magic & PATHSPEC_EXCLUDE)
 618                         nr_exclude++;
 619                 if (item[i].magic & magic_mask)
 620                         unsupported_magic(entry, item[i].magic & magic_mask);
 621
 622                 if ((flags & PATHSPEC_SYMLINK_LEADING_PATH) &&
 623                     has_symlink_leading_path(item[i].match, item[i].len)) {
 624                         die(_("pathspec '%s' is beyond a symbolic link"), entry);
 625                 }
 626
 627                 if (item[i].nowildcard_len < item[i].len)
 628                         pathspec->has_wildcard = 1;
 629                 pathspec->magic |= item[i].magic;
 630         }
 631
 632         /*
 633          * If everything is an exclude pattern, add one positive pattern
 634          * that matches everything. We allocated an extra one for this.
 635          */
 636         if (nr_exclude == n) {
 637                 int plen = (!(flags & PATHSPEC_PREFER_CWD)) ? 0 : prefixlen;
 638                 init_pathspec_item(item + n, 0, prefix, plen, ".");
 639                 pathspec->nr++;
 640         }
 641
 642         if (pathspec->magic & PATHSPEC_MAXDEPTH) {
 643                 if (flags & PATHSPEC_KEEP_ORDER)
 644                         BUG("PATHSPEC_MAXDEPTH_VALID and PATHSPEC_KEEP_ORDER are incompatible");
 645                 QSORT(pathspec->items, pathspec->nr, pathspec_item_cmp);
 646         }
 647 }
 648
 649 void parse_pathspec_file(struct pathspec *pathspec, unsigned magic_mask,
 650                          unsigned flags, const char *prefix,
 651                          const char *file, int nul_term_line)
 652 {
 653         struct strvec parsed_file = STRVEC_INIT;
 654         strbuf_getline_fn getline_fn = nul_term_line ? strbuf_getline_nul :
 655                                                        strbuf_getline;
 656         struct strbuf buf = STRBUF_INIT;
 657         struct strbuf unquoted = STRBUF_INIT;
 658         FILE *in;
 659
 660         if (!strcmp(file, "-"))
 661                 in = stdin;
 662         else
 663                 in = xfopen(file, "r");
 664
 665         while (getline_fn(&buf, in) != EOF) {
 666                 if (!nul_term_line && buf.buf[0] == '"') {
 667                         strbuf_reset(&unquoted);
 668                         if (unquote_c_style(&unquoted, buf.buf, NULL))
 669                                 die(_("line is badly quoted: %s"), buf.buf);
 670                         strbuf_swap(&buf, &unquoted);
 671                 }
 672                 strvec_push(&parsed_file, buf.buf);
 673                 strbuf_reset(&buf);
 674         }
 675
 676         strbuf_release(&unquoted);
 677         strbuf_release(&buf);
 678         if (in != stdin)
 679                 fclose(in);
 680
 681         parse_pathspec(pathspec, magic_mask, flags, prefix, parsed_file.v);
 682         strvec_clear(&parsed_file);
 683 }
 684
 685 void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
 686 {
 687         int i, j;
 688
 689         *dst = *src;
 690         DUP_ARRAY(dst->items, src->items, dst->nr);
 691
 692         for (i = 0; i < dst->nr; i++) {
 693                 struct pathspec_item *d = &dst->items[i];
 694                 struct pathspec_item *s = &src->items[i];
 695
 696                 d->match = xstrdup(s->match);
 697                 d->original = xstrdup(s->original);
 698
 699                 DUP_ARRAY(d->attr_match, s->attr_match, d->attr_match_nr);
 700                 for (j = 0; j < d->attr_match_nr; j++) {
 701                         const char *value = s->attr_match[j].value;
 702                         d->attr_match[j].value = xstrdup_or_null(value);
 703                 }
 704
 705                 d->attr_check = attr_check_dup(s->attr_check);
 706         }
 707 }
 708
 709 void clear_pathspec(struct pathspec *pathspec)
 710 {
 711         int i, j;
 712
 713         for (i = 0; i < pathspec->nr; i++) {
 714                 free(pathspec->items[i].match);
 715                 free(pathspec->items[i].original);
 716
 717                 for (j = 0; j < pathspec->items[i].attr_match_nr; j++)
 718                         free(pathspec->items[i].attr_match[j].value);
 719                 free(pathspec->items[i].attr_match);
 720
 721                 if (pathspec->items[i].attr_check)
 722                         attr_check_free(pathspec->items[i].attr_check);
 723         }
 724
 725         FREE_AND_NULL(pathspec->items);
 726         pathspec->nr = 0;
 727 }
 728
 729 int match_pathspec_attrs(struct index_state *istate,
 730                          const char *name, int namelen,
 731                          const struct pathspec_item *item)
 732 {
 733         int i;
 734         char *to_free = NULL;
 735
 736         if (name[namelen])
 737                 name = to_free = xmemdupz(name, namelen);
 738
 739         git_check_attr(istate, name, item->attr_check);
 740
 741         free(to_free);
 742
 743         for (i = 0; i < item->attr_match_nr; i++) {
 744                 const char *value;
 745                 int matched;
 746                 enum attr_match_mode match_mode;
 747
 748                 value = item->attr_check->items[i].value;
 749                 match_mode = item->attr_match[i].match_mode;
 750
 751                 if (ATTR_TRUE(value))
 752                         matched = (match_mode == MATCH_SET);
 753                 else if (ATTR_FALSE(value))
 754                         matched = (match_mode == MATCH_UNSET);
 755                 else if (ATTR_UNSET(value))
 756                         matched = (match_mode == MATCH_UNSPECIFIED);
 757                 else
 758                         matched = (match_mode == MATCH_VALUE &&
 759                                    !strcmp(item->attr_match[i].value, value));
 760                 if (!matched)
 761                         return 0;
 762         }
 763
 764         return 1;
 765 }
 766
 767 int pathspec_needs_expanded_index(struct index_state *istate,
 768                                   const struct pathspec *pathspec)
 769 {
 770         unsigned int i, pos;
 771         int res = 0;
 772         char *skip_worktree_seen = NULL;
 773
 774         /*
 775          * If index is not sparse, no index expansion is needed.
 776          */
 777         if (!istate->sparse_index)
 778                 return 0;
 779
 780         /*
 781          * When using a magic pathspec, assume for the sake of simplicity that
 782          * the index needs to be expanded to match all matchable files.
 783          */
 784         if (pathspec->magic)
 785                 return 1;
 786
 787         for (i = 0; i < pathspec->nr; i++) {
 788                 struct pathspec_item item = pathspec->items[i];
 789
 790                 /*
 791                  * If the pathspec item has a wildcard, the index should be expanded
 792                  * if the pathspec has the possibility of matching a subset of entries inside
 793                  * of a sparse directory (but not the entire directory).
 794                  *
 795                  * If the pathspec item is a literal path, the index only needs to be expanded
 796                  * if a) the pathspec isn't in the sparse checkout cone (to make sure we don't
 797                  * expand for in-cone files) and b) it doesn't match any sparse directories
 798                  * (since we can reset whole sparse directories without expanding them).
 799                  */
 800                 if (item.nowildcard_len < item.len) {
 801                         /*
 802                          * Special case: if the pattern is a path inside the cone
 803                          * followed by only wildcards, the pattern cannot match
 804                          * partial sparse directories, so we know we don't need to
 805                          * expand the index.
 806                          *
 807                          * Examples:
 808                          * - in-cone/foo***: doesn't need expanded index
 809                          * - not-in-cone/bar*: may need expanded index
 810                          * - **.c: may need expanded index
 811                          */
 812                         if (strspn(item.original + item.nowildcard_len, "*") == item.len - item.nowildcard_len &&
 813                             path_in_cone_mode_sparse_checkout(item.original, istate))
 814                                 continue;
 815
 816                         for (pos = 0; pos < istate->cache_nr; pos++) {
 817                                 struct cache_entry *ce = istate->cache[pos];
 818
 819                                 if (!S_ISSPARSEDIR(ce->ce_mode))
 820                                         continue;
 821
 822                                 /*
 823                                  * If the pre-wildcard length is longer than the sparse
 824                                  * directory name and the sparse directory is the first
 825                                  * component of the pathspec, need to expand the index.
 826                                  */
 827                                 if (item.nowildcard_len > ce_namelen(ce) &&
 828                                     !strncmp(item.original, ce->name, ce_namelen(ce))) {
 829                                         res = 1;
 830                                         break;
 831                                 }
 832
 833                                 /*
 834                                  * If the pre-wildcard length is shorter than the sparse
 835                                  * directory and the pathspec does not match the whole
 836                                  * directory, need to expand the index.
 837                                  */
 838                                 if (!strncmp(item.original, ce->name, item.nowildcard_len) &&
 839                                     wildmatch(item.original, ce->name, 0)) {
 840                                         res = 1;
 841                                         break;
 842                                 }
 843                         }
 844                 } else if (!path_in_cone_mode_sparse_checkout(item.original, istate) &&
 845                            !matches_skip_worktree(pathspec, i, &skip_worktree_seen))
 846                         res = 1;
 847
 848                 if (res > 0)
 849                         break;
 850         }
 851
 852         free(skip_worktree_seen);
 853         return res;
 854 }