pathspec.c

   1 #include "git-compat-util.h"
   2 #include "abspath.h"
   3 #include "parse.h"
   4 #include "dir.h"
   5 #include "environment.h"
   6 #include "gettext.h"
   7 #include "pathspec.h"
   8 #include "attr.h"
   9 #include "read-cache.h"
  10 #include "repository.h"
  11 #include "setup.h"
  12 #include "strvec.h"
  13 #include "symlinks.h"
  14 #include "quote.h"
  15 #include "wildmatch.h"
  16
  17 /*
  18  * Finds which of the given pathspecs match items in the index.
  19  *
  20  * For each pathspec, sets the corresponding entry in the seen[] array
  21  * (which should be specs items long, i.e. the same size as pathspec)
  22  * to the nature of the "closest" (i.e. most specific) match found for
  23  * that pathspec in the index, if it was a closer type of match than
  24  * the existing entry.  As an optimization, matching is skipped
  25  * altogether if seen[] already only contains non-zero entries.
  26  *
  27  * If seen[] has not already been written to, it may make sense
  28  * to use find_pathspecs_matching_against_index() instead.
  29  */
  30 void add_pathspec_matches_against_index(const struct pathspec *pathspec,
  31                                         struct index_state *istate,
  32                                         char *seen,
  33                                         enum ps_skip_worktree_action sw_action)
  34 {
  35         int num_unmatched = 0, i;
  36
  37         /*
  38          * Since we are walking the index as if we were walking the directory,
  39          * we have to mark the matched pathspec as seen; otherwise we will
  40          * mistakenly think that the user gave a pathspec that did not match
  41          * anything.
  42          */
  43         for (i = 0; i < pathspec->nr; i++)
  44                 if (!seen[i])
  45                         num_unmatched++;
  46         if (!num_unmatched)
  47                 return;
  48         for (i = 0; i < istate->cache_nr; i++) {
  49                 const struct cache_entry *ce = istate->cache[i];
  50                 if (sw_action == PS_IGNORE_SKIP_WORKTREE &&
  51                     (ce_skip_worktree(ce) || !path_in_sparse_checkout(ce->name, istate)))
  52                         continue;
  53                 ce_path_match(istate, ce, pathspec, seen);
  54         }
  55 }
  56
  57 /*
  58  * Finds which of the given pathspecs match items in the index.
  59  *
  60  * This is a one-shot wrapper around add_pathspec_matches_against_index()
  61  * which allocates, populates, and returns a seen[] array indicating the
  62  * nature of the "closest" (i.e. most specific) matches which each of the
  63  * given pathspecs achieves against all items in the index.
  64  */
  65 char *find_pathspecs_matching_against_index(const struct pathspec *pathspec,
  66                                             struct index_state *istate,
  67                                             enum ps_skip_worktree_action sw_action)
  68 {
  69         char *seen = xcalloc(pathspec->nr, 1);
  70         add_pathspec_matches_against_index(pathspec, istate, seen, sw_action);
  71         return seen;
  72 }
  73
  74 char *find_pathspecs_matching_skip_worktree(const struct pathspec *pathspec)
  75 {
  76         struct index_state *istate = the_repository->index;
  77         char *seen = xcalloc(pathspec->nr, 1);
  78         int i;
  79
  80         for (i = 0; i < istate->cache_nr; i++) {
  81                 struct cache_entry *ce = istate->cache[i];
  82                 if (ce_skip_worktree(ce) || !path_in_sparse_checkout(ce->name, istate))
  83                     ce_path_match(istate, ce, pathspec, seen);
  84         }
  85
  86         return seen;
  87 }
  88
  89 /*
  90  * Magic pathspec
  91  *
  92  * Possible future magic semantics include stuff like:
  93  *
  94  *      { PATHSPEC_RECURSIVE, '*', "recursive" },
  95  *      { PATHSPEC_REGEXP, '\0', "regexp" },
  96  *
  97  */
  98
  99 static struct pathspec_magic {
 100         unsigned bit;
 101         char mnemonic; /* this cannot be ':'! */
 102         const char *name;
 103 } pathspec_magic[] = {
 104         { PATHSPEC_FROMTOP,  '/', "top" },
 105         { PATHSPEC_LITERAL, '\0', "literal" },
 106         { PATHSPEC_GLOB,    '\0', "glob" },
 107         { PATHSPEC_ICASE,   '\0', "icase" },
 108         { PATHSPEC_EXCLUDE,  '!', "exclude" },
 109         { PATHSPEC_ATTR,    '\0', "attr" },
 110 };
 111
 112 static void prefix_magic(struct strbuf *sb, int prefixlen, unsigned magic)
 113 {
 114         int i;
 115         strbuf_addstr(sb, ":(");
 116         for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
 117                 if (magic & pathspec_magic[i].bit) {
 118                         if (sb->buf[sb->len - 1] != '(')
 119                                 strbuf_addch(sb, ',');
 120                         strbuf_addstr(sb, pathspec_magic[i].name);
 121                 }
 122         strbuf_addf(sb, ",prefix:%d)", prefixlen);
 123 }
 124
 125 static size_t strcspn_escaped(const char *s, const char *stop)
 126 {
 127         const char *i;
 128
 129         for (i = s; *i; i++) {
 130                 /* skip the escaped character */
 131                 if (i[0] == '\\' && i[1]) {
 132                         i++;
 133                         continue;
 134                 }
 135
 136                 if (strchr(stop, *i))
 137                         break;
 138         }
 139         return i - s;
 140 }
 141
 142 static inline int invalid_value_char(const char ch)
 143 {
 144         if (isalnum(ch) || strchr(",-_", ch))
 145                 return 0;
 146         return -1;
 147 }
 148
 149 static char *attr_value_unescape(const char *value)
 150 {
 151         const char *src;
 152         char *dst, *ret;
 153
 154         ret = xmallocz(strlen(value));
 155         for (src = value, dst = ret; *src; src++, dst++) {
 156                 if (*src == '\\') {
 157                         if (!src[1])
 158                                 die(_("Escape character '\\' not allowed as "
 159                                       "last character in attr value"));
 160                         src++;
 161                 }
 162                 if (invalid_value_char(*src))
 163                         die("cannot use '%c' for value matching", *src);
 164                 *dst = *src;
 165         }
 166         *dst = '\0';
 167         return ret;
 168 }
 169
 170 static void parse_pathspec_attr_match(struct pathspec_item *item, const char *value)
 171 {
 172         struct string_list_item *si;
 173         struct string_list list = STRING_LIST_INIT_DUP;
 174
 175         if (item->attr_check || item->attr_match)
 176                 die(_("Only one 'attr:' specification is allowed."));
 177
 178         if (!value || !*value)
 179                 die(_("attr spec must not be empty"));
 180
 181         string_list_split(&list, value, ' ', -1);
 182         string_list_remove_empty_items(&list, 0);
 183
 184         item->attr_check = attr_check_alloc();
 185         CALLOC_ARRAY(item->attr_match, list.nr);
 186
 187         for_each_string_list_item(si, &list) {
 188                 size_t attr_len;
 189                 char *attr_name;
 190                 const struct git_attr *a;
 191
 192                 int j = item->attr_match_nr++;
 193                 const char *attr = si->string;
 194                 struct attr_match *am = &item->attr_match[j];
 195
 196                 switch (*attr) {
 197                 case '!':
 198                         am->match_mode = MATCH_UNSPECIFIED;
 199                         attr++;
 200                         attr_len = strlen(attr);
 201                         break;
 202                 case '-':
 203                         am->match_mode = MATCH_UNSET;
 204                         attr++;
 205                         attr_len = strlen(attr);
 206                         break;
 207                 default:
 208                         attr_len = strcspn(attr, "=");
 209                         if (attr[attr_len] != '=')
 210                                 am->match_mode = MATCH_SET;
 211                         else {
 212                                 const char *v = &attr[attr_len + 1];
 213                                 am->match_mode = MATCH_VALUE;
 214                                 am->value = attr_value_unescape(v);
 215                         }
 216                         break;
 217                 }
 218
 219                 attr_name = xmemdupz(attr, attr_len);
 220                 a = git_attr(attr_name);
 221                 if (!a)
 222                         die(_("invalid attribute name %s"), attr_name);
 223
 224                 attr_check_append(item->attr_check, a);
 225
 226                 free(attr_name);
 227         }
 228
 229         if (item->attr_check->nr != item->attr_match_nr)
 230                 BUG("should have same number of entries");
 231
 232         string_list_clear(&list, 0);
 233 }
 234
 235 static inline int get_literal_global(void)
 236 {
 237         static int literal = -1;
 238
 239         if (literal < 0)
 240                 literal = git_env_bool(GIT_LITERAL_PATHSPECS_ENVIRONMENT, 0);
 241
 242         return literal;
 243 }
 244
 245 static inline int get_glob_global(void)
 246 {
 247         static int glob = -1;
 248
 249         if (glob < 0)
 250                 glob = git_env_bool(GIT_GLOB_PATHSPECS_ENVIRONMENT, 0);
 251
 252         return glob;
 253 }
 254
 255 static inline int get_noglob_global(void)
 256 {
 257         static int noglob = -1;
 258
 259         if (noglob < 0)
 260                 noglob = git_env_bool(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, 0);
 261
 262         return noglob;
 263 }
 264
 265 static inline int get_icase_global(void)
 266 {
 267         static int icase = -1;
 268
 269         if (icase < 0)
 270                 icase = git_env_bool(GIT_ICASE_PATHSPECS_ENVIRONMENT, 0);
 271
 272         return icase;
 273 }
 274
 275 static int get_global_magic(int element_magic)
 276 {
 277         int global_magic = 0;
 278
 279         if (get_literal_global())
 280                 global_magic |= PATHSPEC_LITERAL;
 281
 282         /* --glob-pathspec is overridden by :(literal) */
 283         if (get_glob_global() && !(element_magic & PATHSPEC_LITERAL))
 284                 global_magic |= PATHSPEC_GLOB;
 285
 286         if (get_glob_global() && get_noglob_global())
 287                 die(_("global 'glob' and 'noglob' pathspec settings are incompatible"));
 288
 289         if (get_icase_global())
 290                 global_magic |= PATHSPEC_ICASE;
 291
 292         if ((global_magic & PATHSPEC_LITERAL) &&
 293             (global_magic & ~PATHSPEC_LITERAL))
 294                 die(_("global 'literal' pathspec setting is incompatible "
 295                       "with all other global pathspec settings"));
 296
 297         /* --noglob-pathspec adds :(literal) _unless_ :(glob) is specified */
 298         if (get_noglob_global() && !(element_magic & PATHSPEC_GLOB))
 299                 global_magic |= PATHSPEC_LITERAL;
 300
 301         return global_magic;
 302 }
 303
 304 /*
 305  * Parse the pathspec element looking for long magic
 306  *
 307  * saves all magic in 'magic'
 308  * if prefix magic is used, save the prefix length in 'prefix_len'
 309  * returns the position in 'elem' after all magic has been parsed
 310  */
 311 static const char *parse_long_magic(unsigned *magic, int *prefix_len,
 312                                     struct pathspec_item *item,
 313                                     const char *elem)
 314 {
 315         const char *pos;
 316         const char *nextat;
 317
 318         for (pos = elem + 2; *pos && *pos != ')'; pos = nextat) {
 319                 size_t len = strcspn_escaped(pos, ",)");
 320                 int i;
 321
 322                 if (pos[len] == ',')
 323                         nextat = pos + len + 1; /* handle ',' */
 324                 else
 325                         nextat = pos + len; /* handle ')' and '\0' */
 326
 327                 if (!len)
 328                         continue;
 329
 330                 if (starts_with(pos, "prefix:")) {
 331                         char *endptr;
 332                         *prefix_len = strtol(pos + 7, &endptr, 10);
 333                         if (endptr - pos != len)
 334                                 die(_("invalid parameter for pathspec magic 'prefix'"));
 335                         continue;
 336                 }
 337
 338                 if (starts_with(pos, "attr:")) {
 339                         char *attr_body = xmemdupz(pos + 5, len - 5);
 340                         parse_pathspec_attr_match(item, attr_body);
 341                         *magic |= PATHSPEC_ATTR;
 342                         free(attr_body);
 343                         continue;
 344                 }
 345
 346                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 347                         if (strlen(pathspec_magic[i].name) == len &&
 348                             !strncmp(pathspec_magic[i].name, pos, len)) {
 349                                 *magic |= pathspec_magic[i].bit;
 350                                 break;
 351                         }
 352                 }
 353
 354                 if (ARRAY_SIZE(pathspec_magic) <= i)
 355                         die(_("Invalid pathspec magic '%.*s' in '%s'"),
 356                             (int) len, pos, elem);
 357         }
 358
 359         if (*pos != ')')
 360                 die(_("Missing ')' at the end of pathspec magic in '%s'"),
 361                     elem);
 362         pos++;
 363
 364         return pos;
 365 }
 366
 367 /*
 368  * Parse the pathspec element looking for short magic
 369  *
 370  * saves all magic in 'magic'
 371  * returns the position in 'elem' after all magic has been parsed
 372  */
 373 static const char *parse_short_magic(unsigned *magic, const char *elem)
 374 {
 375         const char *pos;
 376
 377         for (pos = elem + 1; *pos && *pos != ':'; pos++) {
 378                 char ch = *pos;
 379                 int i;
 380
 381                 /* Special case alias for '!' */
 382                 if (ch == '^') {
 383                         *magic |= PATHSPEC_EXCLUDE;
 384                         continue;
 385                 }
 386
 387                 if (!is_pathspec_magic(ch))
 388                         break;
 389
 390                 for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
 391                         if (pathspec_magic[i].mnemonic == ch) {
 392                                 *magic |= pathspec_magic[i].bit;
 393                                 break;
 394                         }
 395                 }
 396
 397                 if (ARRAY_SIZE(pathspec_magic) <= i)
 398                         die(_("Unimplemented pathspec magic '%c' in '%s'"),
 399                             ch, elem);
 400         }
 401
 402         if (*pos == ':')
 403                 pos++;
 404
 405         return pos;
 406 }
 407
 408 static const char *parse_element_magic(unsigned *magic, int *prefix_len,
 409                                        struct pathspec_item *item,
 410                                        const char *elem)
 411 {
 412         if (elem[0] != ':' || get_literal_global())
 413                 return elem; /* nothing to do */
 414         else if (elem[1] == '(')
 415                 /* longhand */
 416                 return parse_long_magic(magic, prefix_len, item, elem);
 417         else
 418                 /* shorthand */
 419                 return parse_short_magic(magic, elem);
 420 }
 421
 422 /*
 423  * Perform the initialization of a pathspec_item based on a pathspec element.
 424  */
 425 static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 426                                const char *prefix, int prefixlen,
 427                                const char *elt)
 428 {
 429         unsigned magic = 0, element_magic = 0;
 430         const char *copyfrom = elt;
 431         char *match;
 432         int pathspec_prefix = -1;
 433
 434         item->attr_check = NULL;
 435         item->attr_match = NULL;
 436         item->attr_match_nr = 0;
 437
 438         /* PATHSPEC_LITERAL_PATH ignores magic */
 439         if (flags & PATHSPEC_LITERAL_PATH) {
 440                 magic = PATHSPEC_LITERAL;
 441         } else {
 442                 copyfrom = parse_element_magic(&element_magic,
 443                                                &pathspec_prefix,
 444                                                item,
 445                                                elt);
 446                 magic |= element_magic;
 447                 magic |= get_global_magic(element_magic);
 448         }
 449
 450         item->magic = magic;
 451
 452         if (pathspec_prefix >= 0 &&
 453             (prefixlen || (prefix && *prefix)))
 454                 BUG("'prefix' magic is supposed to be used at worktree's root");
 455
 456         if ((magic & PATHSPEC_LITERAL) && (magic & PATHSPEC_GLOB))
 457                 die(_("%s: 'literal' and 'glob' are incompatible"), elt);
 458
 459         /* Create match string which will be used for pathspec matching */
 460         if (pathspec_prefix >= 0) {
 461                 match = xstrdup(copyfrom);
 462                 prefixlen = pathspec_prefix;
 463         } else if (magic & PATHSPEC_FROMTOP) {
 464                 match = xstrdup(copyfrom);
 465                 prefixlen = 0;
 466         } else {
 467                 match = prefix_path_gently(prefix, prefixlen,
 468                                            &prefixlen, copyfrom);
 469                 if (!match) {
 470                         const char *hint_path = get_git_work_tree();
 471                         if (!hint_path)
 472                                 hint_path = get_git_dir();
 473                         die(_("%s: '%s' is outside repository at '%s'"), elt,
 474                             copyfrom, absolute_path(hint_path));
 475                 }
 476         }
 477
 478         item->match = match;
 479         item->len = strlen(item->match);
 480         item->prefix = prefixlen;
 481
 482         /*
 483          * Prefix the pathspec (keep all magic) and assign to
 484          * original. Useful for passing to another command.
 485          */
 486         if ((flags & PATHSPEC_PREFIX_ORIGIN) &&
 487             !get_literal_global()) {
 488                 struct strbuf sb = STRBUF_INIT;
 489
 490                 /* Preserve the actual prefix length of each pattern */
 491                 prefix_magic(&sb, prefixlen, element_magic);
 492
 493                 strbuf_addstr(&sb, match);
 494                 item->original = strbuf_detach(&sb, NULL);
 495         } else {
 496                 item->original = xstrdup(elt);
 497         }
 498
 499         if (magic & PATHSPEC_LITERAL) {
 500                 item->nowildcard_len = item->len;
 501         } else {
 502                 item->nowildcard_len = simple_length(item->match);
 503                 if (item->nowildcard_len < prefixlen)
 504                         item->nowildcard_len = prefixlen;
 505         }
 506
 507         item->flags = 0;
 508         if (magic & PATHSPEC_GLOB) {
 509                 /*
 510                  * FIXME: should we enable ONESTAR in _GLOB for
 511                  * pattern "* * / * . c"?
 512                  */
 513         } else {
 514                 if (item->nowildcard_len < item->len &&
 515                     item->match[item->nowildcard_len] == '*' &&
 516                     no_wildcard(item->match + item->nowildcard_len + 1))
 517                         item->flags |= PATHSPEC_ONESTAR;
 518         }
 519
 520         /* sanity checks, pathspec matchers assume these are sane */
 521         if (item->nowildcard_len > item->len ||
 522             item->prefix         > item->len) {
 523                 BUG("error initializing pathspec_item");
 524         }
 525 }
 526
 527 static int pathspec_item_cmp(const void *a_, const void *b_)
 528 {
 529         struct pathspec_item *a, *b;
 530
 531         a = (struct pathspec_item *)a_;
 532         b = (struct pathspec_item *)b_;
 533         return strcmp(a->match, b->match);
 534 }
 535
 536 void pathspec_magic_names(unsigned magic, struct strbuf *out)
 537 {
 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 (out->len)
 544                         strbuf_addstr(out, ", ");
 545
 546                 if (m->mnemonic)
 547                         strbuf_addf(out, _("'%s' (mnemonic: '%c')"),
 548                                     m->name, m->mnemonic);
 549                 else
 550                         strbuf_addf(out, "'%s'", m->name);
 551         }
 552 }
 553
 554 static void NORETURN unsupported_magic(const char *pattern,
 555                                        unsigned magic)
 556 {
 557         struct strbuf sb = STRBUF_INIT;
 558         pathspec_magic_names(magic, &sb);
 559         /*
 560          * We may want to substitute "this command" with a command
 561          * name. E.g. when "git add -p" or "git add -i" dies when running
 562          * "checkout -p"
 563          */
 564         die(_("%s: pathspec magic not supported by this command: %s"),
 565             pattern, sb.buf);
 566 }
 567
 568 void parse_pathspec(struct pathspec *pathspec,
 569                     unsigned magic_mask, unsigned flags,
 570                     const char *prefix, const char **argv)
 571 {
 572         struct pathspec_item *item;
 573         const char *entry = argv ? *argv : NULL;
 574         int i, n, prefixlen, nr_exclude = 0;
 575
 576         memset(pathspec, 0, sizeof(*pathspec));
 577
 578         if (flags & PATHSPEC_MAXDEPTH_VALID)
 579                 pathspec->magic |= PATHSPEC_MAXDEPTH;
 580
 581         /* No arguments, no prefix -> no pathspec */
 582         if (!entry && !prefix)
 583                 return;
 584
 585         if ((flags & PATHSPEC_PREFER_CWD) &&
 586             (flags & PATHSPEC_PREFER_FULL))
 587                 BUG("PATHSPEC_PREFER_CWD and PATHSPEC_PREFER_FULL are incompatible");
 588
 589         /* No arguments with prefix -> prefix pathspec */
 590         if (!entry) {
 591                 if (flags & PATHSPEC_PREFER_FULL)
 592                         return;
 593
 594                 if (!(flags & PATHSPEC_PREFER_CWD))
 595                         BUG("PATHSPEC_PREFER_CWD requires arguments");
 596
 597                 pathspec->items = CALLOC_ARRAY(item, 1);
 598                 item->match = xstrdup(prefix);
 599                 item->original = xstrdup(prefix);
 600                 item->nowildcard_len = item->len = strlen(prefix);
 601                 item->prefix = item->len;
 602                 pathspec->nr = 1;
 603                 return;
 604         }
 605
 606         n = 0;
 607         while (argv[n]) {
 608                 if (*argv[n] == '\0')
 609                         die("empty string is not a valid pathspec. "
 610                                   "please use . instead if you meant to match all paths");
 611                 n++;
 612         }
 613
 614         pathspec->nr = n;
 615         ALLOC_ARRAY(pathspec->items, n + 1);
 616         item = pathspec->items;
 617         prefixlen = prefix ? strlen(prefix) : 0;
 618
 619         for (i = 0; i < n; i++) {
 620                 entry = argv[i];
 621
 622                 init_pathspec_item(item + i, flags, prefix, prefixlen, entry);
 623
 624                 if (item[i].magic & PATHSPEC_EXCLUDE)
 625                         nr_exclude++;
 626                 if (item[i].magic & magic_mask)
 627                         unsupported_magic(entry, item[i].magic & magic_mask);
 628
 629                 if ((flags & PATHSPEC_SYMLINK_LEADING_PATH) &&
 630                     has_symlink_leading_path(item[i].match, item[i].len)) {
 631                         die(_("pathspec '%s' is beyond a symbolic link"), entry);
 632                 }
 633
 634                 if (item[i].nowildcard_len < item[i].len)
 635                         pathspec->has_wildcard = 1;
 636                 pathspec->magic |= item[i].magic;
 637         }
 638
 639         /*
 640          * If everything is an exclude pattern, add one positive pattern
 641          * that matches everything. We allocated an extra one for this.
 642          */
 643         if (nr_exclude == n) {
 644                 int plen = (!(flags & PATHSPEC_PREFER_CWD)) ? 0 : prefixlen;
 645                 init_pathspec_item(item + n, 0, prefix, plen, ".");
 646                 pathspec->nr++;
 647         }
 648
 649         if (pathspec->magic & PATHSPEC_MAXDEPTH) {
 650                 if (flags & PATHSPEC_KEEP_ORDER)
 651                         BUG("PATHSPEC_MAXDEPTH_VALID and PATHSPEC_KEEP_ORDER are incompatible");
 652                 QSORT(pathspec->items, pathspec->nr, pathspec_item_cmp);
 653         }
 654 }
 655
 656 void parse_pathspec_file(struct pathspec *pathspec, unsigned magic_mask,
 657                          unsigned flags, const char *prefix,
 658                          const char *file, int nul_term_line)
 659 {
 660         struct strvec parsed_file = STRVEC_INIT;
 661         strbuf_getline_fn getline_fn = nul_term_line ? strbuf_getline_nul :
 662                                                        strbuf_getline;
 663         struct strbuf buf = STRBUF_INIT;
 664         struct strbuf unquoted = STRBUF_INIT;
 665         FILE *in;
 666
 667         if (!strcmp(file, "-"))
 668                 in = stdin;
 669         else
 670                 in = xfopen(file, "r");
 671
 672         while (getline_fn(&buf, in) != EOF) {
 673                 if (!nul_term_line && buf.buf[0] == '"') {
 674                         strbuf_reset(&unquoted);
 675                         if (unquote_c_style(&unquoted, buf.buf, NULL))
 676                                 die(_("line is badly quoted: %s"), buf.buf);
 677                         strbuf_swap(&buf, &unquoted);
 678                 }
 679                 strvec_push(&parsed_file, buf.buf);
 680                 strbuf_reset(&buf);
 681         }
 682
 683         strbuf_release(&unquoted);
 684         strbuf_release(&buf);
 685         if (in != stdin)
 686                 fclose(in);
 687
 688         parse_pathspec(pathspec, magic_mask, flags, prefix, parsed_file.v);
 689         strvec_clear(&parsed_file);
 690 }
 691
 692 void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
 693 {
 694         int i, j;
 695
 696         *dst = *src;
 697         DUP_ARRAY(dst->items, src->items, dst->nr);
 698
 699         for (i = 0; i < dst->nr; i++) {
 700                 struct pathspec_item *d = &dst->items[i];
 701                 struct pathspec_item *s = &src->items[i];
 702
 703                 d->match = xstrdup(s->match);
 704                 d->original = xstrdup(s->original);
 705
 706                 DUP_ARRAY(d->attr_match, s->attr_match, d->attr_match_nr);
 707                 for (j = 0; j < d->attr_match_nr; j++) {
 708                         const char *value = s->attr_match[j].value;
 709                         d->attr_match[j].value = xstrdup_or_null(value);
 710                 }
 711
 712                 d->attr_check = attr_check_dup(s->attr_check);
 713         }
 714 }
 715
 716 void clear_pathspec(struct pathspec *pathspec)
 717 {
 718         int i, j;
 719
 720         for (i = 0; i < pathspec->nr; i++) {
 721                 free(pathspec->items[i].match);
 722                 free(pathspec->items[i].original);
 723
 724                 for (j = 0; j < pathspec->items[i].attr_match_nr; j++)
 725                         free(pathspec->items[i].attr_match[j].value);
 726                 free(pathspec->items[i].attr_match);
 727
 728                 if (pathspec->items[i].attr_check)
 729                         attr_check_free(pathspec->items[i].attr_check);
 730         }
 731
 732         FREE_AND_NULL(pathspec->items);
 733         pathspec->nr = 0;
 734 }
 735
 736 int match_pathspec_attrs(struct index_state *istate,
 737                          const char *name, int namelen,
 738                          const struct pathspec_item *item)
 739 {
 740         int i;
 741         char *to_free = NULL;
 742
 743         if (name[namelen])
 744                 name = to_free = xmemdupz(name, namelen);
 745
 746         git_check_attr(istate, name, item->attr_check);
 747
 748         free(to_free);
 749
 750         for (i = 0; i < item->attr_match_nr; i++) {
 751                 const char *value;
 752                 int matched;
 753                 enum attr_match_mode match_mode;
 754
 755                 value = item->attr_check->items[i].value;
 756                 match_mode = item->attr_match[i].match_mode;
 757
 758                 if (ATTR_TRUE(value))
 759                         matched = (match_mode == MATCH_SET);
 760                 else if (ATTR_FALSE(value))
 761                         matched = (match_mode == MATCH_UNSET);
 762                 else if (ATTR_UNSET(value))
 763                         matched = (match_mode == MATCH_UNSPECIFIED);
 764                 else
 765                         matched = (match_mode == MATCH_VALUE &&
 766                                    !strcmp(item->attr_match[i].value, value));
 767                 if (!matched)
 768                         return 0;
 769         }
 770
 771         return 1;
 772 }
 773
 774 int pathspec_needs_expanded_index(struct index_state *istate,
 775                                   const struct pathspec *pathspec)
 776 {
 777         unsigned int i, pos;
 778         int res = 0;
 779         char *skip_worktree_seen = NULL;
 780
 781         /*
 782          * If index is not sparse, no index expansion is needed.
 783          */
 784         if (!istate->sparse_index)
 785                 return 0;
 786
 787         /*
 788          * When using a magic pathspec, assume for the sake of simplicity that
 789          * the index needs to be expanded to match all matchable files.
 790          */
 791         if (pathspec->magic)
 792                 return 1;
 793
 794         for (i = 0; i < pathspec->nr; i++) {
 795                 struct pathspec_item item = pathspec->items[i];
 796
 797                 /*
 798                  * If the pathspec item has a wildcard, the index should be expanded
 799                  * if the pathspec has the possibility of matching a subset of entries inside
 800                  * of a sparse directory (but not the entire directory).
 801                  *
 802                  * If the pathspec item is a literal path, the index only needs to be expanded
 803                  * if a) the pathspec isn't in the sparse checkout cone (to make sure we don't
 804                  * expand for in-cone files) and b) it doesn't match any sparse directories
 805                  * (since we can reset whole sparse directories without expanding them).
 806                  */
 807                 if (item.nowildcard_len < item.len) {
 808                         /*
 809                          * Special case: if the pattern is a path inside the cone
 810                          * followed by only wildcards, the pattern cannot match
 811                          * partial sparse directories, so we know we don't need to
 812                          * expand the index.
 813                          *
 814                          * Examples:
 815                          * - in-cone/foo***: doesn't need expanded index
 816                          * - not-in-cone/bar*: may need expanded index
 817                          * - **.c: may need expanded index
 818                          */
 819                         if (strspn(item.original + item.nowildcard_len, "*") == item.len - item.nowildcard_len &&
 820                             path_in_cone_mode_sparse_checkout(item.original, istate))
 821                                 continue;
 822
 823                         for (pos = 0; pos < istate->cache_nr; pos++) {
 824                                 struct cache_entry *ce = istate->cache[pos];
 825
 826                                 if (!S_ISSPARSEDIR(ce->ce_mode))
 827                                         continue;
 828
 829                                 /*
 830                                  * If the pre-wildcard length is longer than the sparse
 831                                  * directory name and the sparse directory is the first
 832                                  * component of the pathspec, need to expand the index.
 833                                  */
 834                                 if (item.nowildcard_len > ce_namelen(ce) &&
 835                                     !strncmp(item.original, ce->name, ce_namelen(ce))) {
 836                                         res = 1;
 837                                         break;
 838                                 }
 839
 840                                 /*
 841                                  * If the pre-wildcard length is shorter than the sparse
 842                                  * directory and the pathspec does not match the whole
 843                                  * directory, need to expand the index.
 844                                  */
 845                                 if (!strncmp(item.original, ce->name, item.nowildcard_len) &&
 846                                     wildmatch(item.original, ce->name, 0)) {
 847                                         res = 1;
 848                                         break;
 849                                 }
 850                         }
 851                 } else if (!path_in_cone_mode_sparse_checkout(item.original, istate) &&
 852                            !matches_skip_worktree(pathspec, i, &skip_worktree_seen))
 853                         res = 1;
 854
 855                 if (res > 0)
 856                         break;
 857         }
 858
 859         free(skip_worktree_seen);
 860         return res;
 861 }