builtin/sparse-checkout.c

   1 #include "builtin.h"
   2 #include "config.h"
   3 #include "dir.h"
   4 #include "parse-options.h"
   5 #include "pathspec.h"
   6 #include "repository.h"
   7 #include "run-command.h"
   8 #include "strbuf.h"
   9 #include "string-list.h"
  10 #include "cache.h"
  11 #include "cache-tree.h"
  12 #include "lockfile.h"
  13 #include "resolve-undo.h"
  14 #include "unpack-trees.h"
  15 #include "wt-status.h"
  16 #include "quote.h"
  17
  18 static const char *empty_base = "";
  19
  20 static char const * const builtin_sparse_checkout_usage[] = {
  21         N_("git sparse-checkout (init|list|set|add|reapply|disable) <options>"),
  22         NULL
  23 };
  24
  25 static char *get_sparse_checkout_filename(void)
  26 {
  27         return git_pathdup("info/sparse-checkout");
  28 }
  29
  30 static void write_patterns_to_file(FILE *fp, struct pattern_list *pl)
  31 {
  32         int i;
  33
  34         for (i = 0; i < pl->nr; i++) {
  35                 struct path_pattern *p = pl->patterns[i];
  36
  37                 if (p->flags & PATTERN_FLAG_NEGATIVE)
  38                         fprintf(fp, "!");
  39
  40                 fprintf(fp, "%s", p->pattern);
  41
  42                 if (p->flags & PATTERN_FLAG_MUSTBEDIR)
  43                         fprintf(fp, "/");
  44
  45                 fprintf(fp, "\n");
  46         }
  47 }
  48
  49 static int sparse_checkout_list(int argc, const char **argv)
  50 {
  51         struct pattern_list pl;
  52         char *sparse_filename;
  53         int res;
  54
  55         memset(&pl, 0, sizeof(pl));
  56
  57         pl.use_cone_patterns = core_sparse_checkout_cone;
  58
  59         sparse_filename = get_sparse_checkout_filename();
  60         res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL);
  61         free(sparse_filename);
  62
  63         if (res < 0) {
  64                 warning(_("this worktree is not sparse (sparse-checkout file may not exist)"));
  65                 return 0;
  66         }
  67
  68         if (pl.use_cone_patterns) {
  69                 int i;
  70                 struct pattern_entry *pe;
  71                 struct hashmap_iter iter;
  72                 struct string_list sl = STRING_LIST_INIT_DUP;
  73
  74                 hashmap_for_each_entry(&pl.recursive_hashmap, &iter, pe, ent) {
  75                         /* pe->pattern starts with "/", skip it */
  76                         string_list_insert(&sl, pe->pattern + 1);
  77                 }
  78
  79                 string_list_sort(&sl);
  80
  81                 for (i = 0; i < sl.nr; i++) {
  82                         quote_c_style(sl.items[i].string, NULL, stdout, 0);
  83                         printf("\n");
  84                 }
  85
  86                 return 0;
  87         }
  88
  89         write_patterns_to_file(stdout, &pl);
  90         clear_pattern_list(&pl);
  91
  92         return 0;
  93 }
  94
  95 static int update_working_directory(struct pattern_list *pl)
  96 {
  97         enum update_sparsity_result result;
  98         struct unpack_trees_options o;
  99         struct lock_file lock_file = LOCK_INIT;
 100         struct repository *r = the_repository;
 101
 102         memset(&o, 0, sizeof(o));
 103         o.verbose_update = isatty(2);
 104         o.update = 1;
 105         o.head_idx = -1;
 106         o.src_index = r->index;
 107         o.dst_index = r->index;
 108         o.skip_sparse_checkout = 0;
 109         o.pl = pl;
 110
 111         setup_work_tree();
 112
 113         repo_hold_locked_index(r, &lock_file, LOCK_DIE_ON_ERROR);
 114
 115         setup_unpack_trees_porcelain(&o, "sparse-checkout");
 116         result = update_sparsity(&o);
 117         clear_unpack_trees_porcelain(&o);
 118
 119         if (result == UPDATE_SPARSITY_WARNINGS)
 120                 /*
 121                  * We don't do any special handling of warnings from untracked
 122                  * files in the way or dirty entries that can't be removed.
 123                  */
 124                 result = UPDATE_SPARSITY_SUCCESS;
 125         if (result == UPDATE_SPARSITY_SUCCESS)
 126                 write_locked_index(r->index, &lock_file, COMMIT_LOCK);
 127         else
 128                 rollback_lock_file(&lock_file);
 129
 130         return result;
 131 }
 132
 133 static char *escaped_pattern(char *pattern)
 134 {
 135         char *p = pattern;
 136         struct strbuf final = STRBUF_INIT;
 137
 138         while (*p) {
 139                 if (is_glob_special(*p))
 140                         strbuf_addch(&final, '\\');
 141
 142                 strbuf_addch(&final, *p);
 143                 p++;
 144         }
 145
 146         return strbuf_detach(&final, NULL);
 147 }
 148
 149 static void write_cone_to_file(FILE *fp, struct pattern_list *pl)
 150 {
 151         int i;
 152         struct pattern_entry *pe;
 153         struct hashmap_iter iter;
 154         struct string_list sl = STRING_LIST_INIT_DUP;
 155         struct strbuf parent_pattern = STRBUF_INIT;
 156
 157         hashmap_for_each_entry(&pl->parent_hashmap, &iter, pe, ent) {
 158                 if (hashmap_get_entry(&pl->recursive_hashmap, pe, ent, NULL))
 159                         continue;
 160
 161                 if (!hashmap_contains_parent(&pl->recursive_hashmap,
 162                                              pe->pattern,
 163                                              &parent_pattern))
 164                         string_list_insert(&sl, pe->pattern);
 165         }
 166
 167         string_list_sort(&sl);
 168         string_list_remove_duplicates(&sl, 0);
 169
 170         fprintf(fp, "/*\n!/*/\n");
 171
 172         for (i = 0; i < sl.nr; i++) {
 173                 char *pattern = escaped_pattern(sl.items[i].string);
 174
 175                 if (strlen(pattern))
 176                         fprintf(fp, "%s/\n!%s/*/\n", pattern, pattern);
 177                 free(pattern);
 178         }
 179
 180         string_list_clear(&sl, 0);
 181
 182         hashmap_for_each_entry(&pl->recursive_hashmap, &iter, pe, ent) {
 183                 if (!hashmap_contains_parent(&pl->recursive_hashmap,
 184                                              pe->pattern,
 185                                              &parent_pattern))
 186                         string_list_insert(&sl, pe->pattern);
 187         }
 188
 189         strbuf_release(&parent_pattern);
 190
 191         string_list_sort(&sl);
 192         string_list_remove_duplicates(&sl, 0);
 193
 194         for (i = 0; i < sl.nr; i++) {
 195                 char *pattern = escaped_pattern(sl.items[i].string);
 196                 fprintf(fp, "%s/\n", pattern);
 197                 free(pattern);
 198         }
 199 }
 200
 201 static int write_patterns_and_update(struct pattern_list *pl)
 202 {
 203         char *sparse_filename;
 204         FILE *fp;
 205         int fd;
 206         struct lock_file lk = LOCK_INIT;
 207         int result;
 208
 209         sparse_filename = get_sparse_checkout_filename();
 210
 211         if (safe_create_leading_directories(sparse_filename))
 212                 die(_("failed to create directory for sparse-checkout file"));
 213
 214         fd = hold_lock_file_for_update(&lk, sparse_filename,
 215                                       LOCK_DIE_ON_ERROR);
 216
 217         result = update_working_directory(pl);
 218         if (result) {
 219                 rollback_lock_file(&lk);
 220                 free(sparse_filename);
 221                 clear_pattern_list(pl);
 222                 update_working_directory(NULL);
 223                 return result;
 224         }
 225
 226         fp = xfdopen(fd, "w");
 227
 228         if (core_sparse_checkout_cone)
 229                 write_cone_to_file(fp, pl);
 230         else
 231                 write_patterns_to_file(fp, pl);
 232
 233         fflush(fp);
 234         commit_lock_file(&lk);
 235
 236         free(sparse_filename);
 237         clear_pattern_list(pl);
 238
 239         return 0;
 240 }
 241
 242 enum sparse_checkout_mode {
 243         MODE_NO_PATTERNS = 0,
 244         MODE_ALL_PATTERNS = 1,
 245         MODE_CONE_PATTERNS = 2,
 246 };
 247
 248 static int set_config(enum sparse_checkout_mode mode)
 249 {
 250         const char *config_path;
 251
 252         if (git_config_set_gently("extensions.worktreeConfig", "true")) {
 253                 error(_("failed to set extensions.worktreeConfig setting"));
 254                 return 1;
 255         }
 256
 257         config_path = git_path("config.worktree");
 258         git_config_set_in_file_gently(config_path,
 259                                       "core.sparseCheckout",
 260                                       mode ? "true" : NULL);
 261
 262         git_config_set_in_file_gently(config_path,
 263                                       "core.sparseCheckoutCone",
 264                                       mode == MODE_CONE_PATTERNS ? "true" : NULL);
 265
 266         return 0;
 267 }
 268
 269 static char const * const builtin_sparse_checkout_init_usage[] = {
 270         N_("git sparse-checkout init [--cone]"),
 271         NULL
 272 };
 273
 274 static struct sparse_checkout_init_opts {
 275         int cone_mode;
 276 } init_opts;
 277
 278 static int sparse_checkout_init(int argc, const char **argv)
 279 {
 280         struct pattern_list pl;
 281         char *sparse_filename;
 282         int res;
 283         struct object_id oid;
 284         int mode;
 285         struct strbuf pattern = STRBUF_INIT;
 286
 287         static struct option builtin_sparse_checkout_init_options[] = {
 288                 OPT_BOOL(0, "cone", &init_opts.cone_mode,
 289                          N_("initialize the sparse-checkout in cone mode")),
 290                 OPT_END(),
 291         };
 292
 293         repo_read_index(the_repository);
 294
 295         argc = parse_options(argc, argv, NULL,
 296                              builtin_sparse_checkout_init_options,
 297                              builtin_sparse_checkout_init_usage, 0);
 298
 299         if (init_opts.cone_mode) {
 300                 mode = MODE_CONE_PATTERNS;
 301                 core_sparse_checkout_cone = 1;
 302         } else
 303                 mode = MODE_ALL_PATTERNS;
 304
 305         if (set_config(mode))
 306                 return 1;
 307
 308         memset(&pl, 0, sizeof(pl));
 309
 310         sparse_filename = get_sparse_checkout_filename();
 311         res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL);
 312
 313         /* If we already have a sparse-checkout file, use it. */
 314         if (res >= 0) {
 315                 free(sparse_filename);
 316                 core_apply_sparse_checkout = 1;
 317                 return update_working_directory(NULL);
 318         }
 319
 320         if (get_oid("HEAD", &oid)) {
 321                 FILE *fp;
 322
 323                 /* assume we are in a fresh repo, but update the sparse-checkout file */
 324                 fp = xfopen(sparse_filename, "w");
 325                 if (!fp)
 326                         die(_("failed to open '%s'"), sparse_filename);
 327
 328                 free(sparse_filename);
 329                 fprintf(fp, "/*\n!/*/\n");
 330                 fclose(fp);
 331                 return 0;
 332         }
 333
 334         strbuf_addstr(&pattern, "/*");
 335         add_pattern(strbuf_detach(&pattern, NULL), empty_base, 0, &pl, 0);
 336         strbuf_addstr(&pattern, "!/*/");
 337         add_pattern(strbuf_detach(&pattern, NULL), empty_base, 0, &pl, 0);
 338
 339         return write_patterns_and_update(&pl);
 340 }
 341
 342 static void insert_recursive_pattern(struct pattern_list *pl, struct strbuf *path)
 343 {
 344         struct pattern_entry *e = xmalloc(sizeof(*e));
 345         e->patternlen = path->len;
 346         e->pattern = strbuf_detach(path, NULL);
 347         hashmap_entry_init(&e->ent,
 348                            ignore_case ?
 349                            strihash(e->pattern) :
 350                            strhash(e->pattern));
 351
 352         hashmap_add(&pl->recursive_hashmap, &e->ent);
 353
 354         while (e->patternlen) {
 355                 char *slash = strrchr(e->pattern, '/');
 356                 char *oldpattern = e->pattern;
 357                 size_t newlen;
 358
 359                 if (slash == e->pattern)
 360                         break;
 361
 362                 newlen = slash - e->pattern;
 363                 e = xmalloc(sizeof(struct pattern_entry));
 364                 e->patternlen = newlen;
 365                 e->pattern = xstrndup(oldpattern, newlen);
 366                 hashmap_entry_init(&e->ent,
 367                                    ignore_case ?
 368                                    strihash(e->pattern) :
 369                                    strhash(e->pattern));
 370
 371                 if (!hashmap_get_entry(&pl->parent_hashmap, e, ent, NULL))
 372                         hashmap_add(&pl->parent_hashmap, &e->ent);
 373         }
 374 }
 375
 376 static void strbuf_to_cone_pattern(struct strbuf *line, struct pattern_list *pl)
 377 {
 378         strbuf_trim(line);
 379
 380         strbuf_trim_trailing_dir_sep(line);
 381
 382         if (strbuf_normalize_path(line))
 383                 die(_("could not normalize path %s"), line->buf);
 384
 385         if (!line->len)
 386                 return;
 387
 388         if (line->buf[0] != '/')
 389                 strbuf_insertstr(line, 0, "/");
 390
 391         insert_recursive_pattern(pl, line);
 392 }
 393
 394 static char const * const builtin_sparse_checkout_set_usage[] = {
 395         N_("git sparse-checkout (set|add) (--stdin | <patterns>)"),
 396         NULL
 397 };
 398
 399 static struct sparse_checkout_set_opts {
 400         int use_stdin;
 401 } set_opts;
 402
 403 static void add_patterns_from_input(struct pattern_list *pl,
 404                                     int argc, const char **argv)
 405 {
 406         int i;
 407         if (core_sparse_checkout_cone) {
 408                 struct strbuf line = STRBUF_INIT;
 409
 410                 hashmap_init(&pl->recursive_hashmap, pl_hashmap_cmp, NULL, 0);
 411                 hashmap_init(&pl->parent_hashmap, pl_hashmap_cmp, NULL, 0);
 412                 pl->use_cone_patterns = 1;
 413
 414                 if (set_opts.use_stdin) {
 415                         struct strbuf unquoted = STRBUF_INIT;
 416                         while (!strbuf_getline(&line, stdin)) {
 417                                 if (line.buf[0] == '"') {
 418                                         strbuf_reset(&unquoted);
 419                                         if (unquote_c_style(&unquoted, line.buf, NULL))
 420                                                 die(_("unable to unquote C-style string '%s'"),
 421                                                 line.buf);
 422
 423                                         strbuf_swap(&unquoted, &line);
 424                                 }
 425
 426                                 strbuf_to_cone_pattern(&line, pl);
 427                         }
 428
 429                         strbuf_release(&unquoted);
 430                 } else {
 431                         for (i = 0; i < argc; i++) {
 432                                 strbuf_setlen(&line, 0);
 433                                 strbuf_addstr(&line, argv[i]);
 434                                 strbuf_to_cone_pattern(&line, pl);
 435                         }
 436                 }
 437         } else {
 438                 if (set_opts.use_stdin) {
 439                         struct strbuf line = STRBUF_INIT;
 440
 441                         while (!strbuf_getline(&line, stdin)) {
 442                                 size_t len;
 443                                 char *buf = strbuf_detach(&line, &len);
 444                                 add_pattern(buf, empty_base, 0, pl, 0);
 445                         }
 446                 } else {
 447                         for (i = 0; i < argc; i++)
 448                                 add_pattern(argv[i], empty_base, 0, pl, 0);
 449                 }
 450         }
 451 }
 452
 453 enum modify_type {
 454         REPLACE,
 455         ADD,
 456 };
 457
 458 static void add_patterns_cone_mode(int argc, const char **argv,
 459                                    struct pattern_list *pl)
 460 {
 461         struct strbuf buffer = STRBUF_INIT;
 462         struct pattern_entry *pe;
 463         struct hashmap_iter iter;
 464         struct pattern_list existing;
 465         char *sparse_filename = get_sparse_checkout_filename();
 466
 467         add_patterns_from_input(pl, argc, argv);
 468
 469         memset(&existing, 0, sizeof(existing));
 470         existing.use_cone_patterns = core_sparse_checkout_cone;
 471
 472         if (add_patterns_from_file_to_list(sparse_filename, "", 0,
 473                                            &existing, NULL))
 474                 die(_("unable to load existing sparse-checkout patterns"));
 475         free(sparse_filename);
 476
 477         hashmap_for_each_entry(&existing.recursive_hashmap, &iter, pe, ent) {
 478                 if (!hashmap_contains_parent(&pl->recursive_hashmap,
 479                                         pe->pattern, &buffer) ||
 480                     !hashmap_contains_parent(&pl->parent_hashmap,
 481                                         pe->pattern, &buffer)) {
 482                         strbuf_reset(&buffer);
 483                         strbuf_addstr(&buffer, pe->pattern);
 484                         insert_recursive_pattern(pl, &buffer);
 485                 }
 486         }
 487
 488         clear_pattern_list(&existing);
 489         strbuf_release(&buffer);
 490 }
 491
 492 static void add_patterns_literal(int argc, const char **argv,
 493                                  struct pattern_list *pl)
 494 {
 495         char *sparse_filename = get_sparse_checkout_filename();
 496         if (add_patterns_from_file_to_list(sparse_filename, "", 0,
 497                                            pl, NULL))
 498                 die(_("unable to load existing sparse-checkout patterns"));
 499         free(sparse_filename);
 500         add_patterns_from_input(pl, argc, argv);
 501 }
 502
 503 static int modify_pattern_list(int argc, const char **argv, enum modify_type m)
 504 {
 505         int result;
 506         int changed_config = 0;
 507         struct pattern_list pl;
 508         memset(&pl, 0, sizeof(pl));
 509
 510         switch (m) {
 511         case ADD:
 512                 if (core_sparse_checkout_cone)
 513                         add_patterns_cone_mode(argc, argv, &pl);
 514                 else
 515                         add_patterns_literal(argc, argv, &pl);
 516                 break;
 517
 518         case REPLACE:
 519                 add_patterns_from_input(&pl, argc, argv);
 520                 break;
 521         }
 522
 523         if (!core_apply_sparse_checkout) {
 524                 set_config(MODE_ALL_PATTERNS);
 525                 core_apply_sparse_checkout = 1;
 526                 changed_config = 1;
 527         }
 528
 529         result = write_patterns_and_update(&pl);
 530
 531         if (result && changed_config)
 532                 set_config(MODE_NO_PATTERNS);
 533
 534         clear_pattern_list(&pl);
 535         return result;
 536 }
 537
 538 static int sparse_checkout_set(int argc, const char **argv, const char *prefix,
 539                                enum modify_type m)
 540 {
 541         static struct option builtin_sparse_checkout_set_options[] = {
 542                 OPT_BOOL(0, "stdin", &set_opts.use_stdin,
 543                          N_("read patterns from standard in")),
 544                 OPT_END(),
 545         };
 546
 547         repo_read_index(the_repository);
 548
 549         argc = parse_options(argc, argv, prefix,
 550                              builtin_sparse_checkout_set_options,
 551                              builtin_sparse_checkout_set_usage,
 552                              PARSE_OPT_KEEP_UNKNOWN);
 553
 554         return modify_pattern_list(argc, argv, m);
 555 }
 556
 557 static int sparse_checkout_reapply(int argc, const char **argv)
 558 {
 559         repo_read_index(the_repository);
 560         return update_working_directory(NULL);
 561 }
 562
 563 static int sparse_checkout_disable(int argc, const char **argv)
 564 {
 565         struct pattern_list pl;
 566         struct strbuf match_all = STRBUF_INIT;
 567
 568         repo_read_index(the_repository);
 569
 570         memset(&pl, 0, sizeof(pl));
 571         hashmap_init(&pl.recursive_hashmap, pl_hashmap_cmp, NULL, 0);
 572         hashmap_init(&pl.parent_hashmap, pl_hashmap_cmp, NULL, 0);
 573         pl.use_cone_patterns = 0;
 574         core_apply_sparse_checkout = 1;
 575
 576         strbuf_addstr(&match_all, "/*");
 577         add_pattern(strbuf_detach(&match_all, NULL), empty_base, 0, &pl, 0);
 578
 579         if (update_working_directory(&pl))
 580                 die(_("error while refreshing working directory"));
 581
 582         clear_pattern_list(&pl);
 583         return set_config(MODE_NO_PATTERNS);
 584 }
 585
 586 int cmd_sparse_checkout(int argc, const char **argv, const char *prefix)
 587 {
 588         static struct option builtin_sparse_checkout_options[] = {
 589                 OPT_END(),
 590         };
 591
 592         if (argc == 2 && !strcmp(argv[1], "-h"))
 593                 usage_with_options(builtin_sparse_checkout_usage,
 594                                    builtin_sparse_checkout_options);
 595
 596         argc = parse_options(argc, argv, prefix,
 597                              builtin_sparse_checkout_options,
 598                              builtin_sparse_checkout_usage,
 599                              PARSE_OPT_STOP_AT_NON_OPTION);
 600
 601         git_config(git_default_config, NULL);
 602
 603         if (argc > 0) {
 604                 if (!strcmp(argv[0], "list"))
 605                         return sparse_checkout_list(argc, argv);
 606                 if (!strcmp(argv[0], "init"))
 607                         return sparse_checkout_init(argc, argv);
 608                 if (!strcmp(argv[0], "set"))
 609                         return sparse_checkout_set(argc, argv, prefix, REPLACE);
 610                 if (!strcmp(argv[0], "add"))
 611                         return sparse_checkout_set(argc, argv, prefix, ADD);
 612                 if (!strcmp(argv[0], "reapply"))
 613                         return sparse_checkout_reapply(argc, argv);
 614                 if (!strcmp(argv[0], "disable"))
 615                         return sparse_checkout_disable(argc, argv);
 616         }
 617
 618         usage_with_options(builtin_sparse_checkout_usage,
 619                            builtin_sparse_checkout_options);
 620 }