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