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|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         int result = 0;
  98         struct unpack_trees_options o;
  99         struct lock_file lock_file = LOCK_INIT;
 100         struct object_id oid;
 101         struct tree *tree;
 102         struct tree_desc t;
 103         struct repository *r = the_repository;
 104
 105         if (repo_read_index_unmerged(r))
 106                 die(_("you need to resolve your current index first"));
 107
 108         if (get_oid("HEAD", &oid))
 109                 return 0;
 110
 111         tree = parse_tree_indirect(&oid);
 112         parse_tree(tree);
 113         init_tree_desc(&t, tree->buffer, tree->size);
 114
 115         memset(&o, 0, sizeof(o));
 116         o.verbose_update = isatty(2);
 117         o.merge = 1;
 118         o.update = 1;
 119         o.fn = oneway_merge;
 120         o.head_idx = -1;
 121         o.src_index = r->index;
 122         o.dst_index = r->index;
 123         o.skip_sparse_checkout = 0;
 124         o.pl = pl;
 125         o.keep_pattern_list = !!pl;
 126
 127         resolve_undo_clear_index(r->index);
 128         setup_work_tree();
 129
 130         cache_tree_free(&r->index->cache_tree);
 131
 132         repo_hold_locked_index(r, &lock_file, LOCK_DIE_ON_ERROR);
 133
 134         core_apply_sparse_checkout = 1;
 135         result = unpack_trees(1, &t, &o);
 136
 137         if (!result) {
 138                 prime_cache_tree(r, r->index, tree);
 139                 write_locked_index(r->index, &lock_file, COMMIT_LOCK);
 140         } else
 141                 rollback_lock_file(&lock_file);
 142
 143         return result;
 144 }
 145
 146 static char *escaped_pattern(char *pattern)
 147 {
 148         char *p = pattern;
 149         struct strbuf final = STRBUF_INIT;
 150
 151         while (*p) {
 152                 if (is_glob_special(*p))
 153                         strbuf_addch(&final, '\\');
 154
 155                 strbuf_addch(&final, *p);
 156                 p++;
 157         }
 158
 159         return strbuf_detach(&final, NULL);
 160 }
 161
 162 static void write_cone_to_file(FILE *fp, struct pattern_list *pl)
 163 {
 164         int i;
 165         struct pattern_entry *pe;
 166         struct hashmap_iter iter;
 167         struct string_list sl = STRING_LIST_INIT_DUP;
 168         struct strbuf parent_pattern = STRBUF_INIT;
 169
 170         hashmap_for_each_entry(&pl->parent_hashmap, &iter, pe, ent) {
 171                 if (hashmap_get_entry(&pl->recursive_hashmap, pe, ent, NULL))
 172                         continue;
 173
 174                 if (!hashmap_contains_parent(&pl->recursive_hashmap,
 175                                              pe->pattern,
 176                                              &parent_pattern))
 177                         string_list_insert(&sl, pe->pattern);
 178         }
 179
 180         string_list_sort(&sl);
 181         string_list_remove_duplicates(&sl, 0);
 182
 183         fprintf(fp, "/*\n!/*/\n");
 184
 185         for (i = 0; i < sl.nr; i++) {
 186                 char *pattern = escaped_pattern(sl.items[i].string);
 187
 188                 if (strlen(pattern))
 189                         fprintf(fp, "%s/\n!%s/*/\n", pattern, pattern);
 190                 free(pattern);
 191         }
 192
 193         string_list_clear(&sl, 0);
 194
 195         hashmap_for_each_entry(&pl->recursive_hashmap, &iter, pe, ent) {
 196                 if (!hashmap_contains_parent(&pl->recursive_hashmap,
 197                                              pe->pattern,
 198                                              &parent_pattern))
 199                         string_list_insert(&sl, pe->pattern);
 200         }
 201
 202         strbuf_release(&parent_pattern);
 203
 204         string_list_sort(&sl);
 205         string_list_remove_duplicates(&sl, 0);
 206
 207         for (i = 0; i < sl.nr; i++) {
 208                 char *pattern = escaped_pattern(sl.items[i].string);
 209                 fprintf(fp, "%s/\n", pattern);
 210                 free(pattern);
 211         }
 212 }
 213
 214 static int write_patterns_and_update(struct pattern_list *pl)
 215 {
 216         char *sparse_filename;
 217         FILE *fp;
 218         int fd;
 219         struct lock_file lk = LOCK_INIT;
 220         int result;
 221
 222         sparse_filename = get_sparse_checkout_filename();
 223
 224         if (safe_create_leading_directories(sparse_filename))
 225                 die(_("failed to create directory for sparse-checkout file"));
 226
 227         fd = hold_lock_file_for_update(&lk, sparse_filename,
 228                                       LOCK_DIE_ON_ERROR);
 229
 230         result = update_working_directory(pl);
 231         if (result) {
 232                 rollback_lock_file(&lk);
 233                 free(sparse_filename);
 234                 clear_pattern_list(pl);
 235                 update_working_directory(NULL);
 236                 return result;
 237         }
 238
 239         fp = xfdopen(fd, "w");
 240
 241         if (core_sparse_checkout_cone)
 242                 write_cone_to_file(fp, pl);
 243         else
 244                 write_patterns_to_file(fp, pl);
 245
 246         fflush(fp);
 247         commit_lock_file(&lk);
 248
 249         free(sparse_filename);
 250         clear_pattern_list(pl);
 251
 252         return 0;
 253 }
 254
 255 enum sparse_checkout_mode {
 256         MODE_NO_PATTERNS = 0,
 257         MODE_ALL_PATTERNS = 1,
 258         MODE_CONE_PATTERNS = 2,
 259 };
 260
 261 static int set_config(enum sparse_checkout_mode mode)
 262 {
 263         const char *config_path;
 264
 265         if (git_config_set_gently("extensions.worktreeConfig", "true")) {
 266                 error(_("failed to set extensions.worktreeConfig setting"));
 267                 return 1;
 268         }
 269
 270         config_path = git_path("config.worktree");
 271         git_config_set_in_file_gently(config_path,
 272                                       "core.sparseCheckout",
 273                                       mode ? "true" : NULL);
 274
 275         git_config_set_in_file_gently(config_path,
 276                                       "core.sparseCheckoutCone",
 277                                       mode == MODE_CONE_PATTERNS ? "true" : NULL);
 278
 279         return 0;
 280 }
 281
 282 static char const * const builtin_sparse_checkout_init_usage[] = {
 283         N_("git sparse-checkout init [--cone]"),
 284         NULL
 285 };
 286
 287 static struct sparse_checkout_init_opts {
 288         int cone_mode;
 289 } init_opts;
 290
 291 static int sparse_checkout_init(int argc, const char **argv)
 292 {
 293         struct pattern_list pl;
 294         char *sparse_filename;
 295         int res;
 296         struct object_id oid;
 297         int mode;
 298         struct strbuf pattern = STRBUF_INIT;
 299
 300         static struct option builtin_sparse_checkout_init_options[] = {
 301                 OPT_BOOL(0, "cone", &init_opts.cone_mode,
 302                          N_("initialize the sparse-checkout in cone mode")),
 303                 OPT_END(),
 304         };
 305
 306         repo_read_index(the_repository);
 307         require_clean_work_tree(the_repository,
 308                                 N_("initialize sparse-checkout"), NULL, 1, 0);
 309
 310         argc = parse_options(argc, argv, NULL,
 311                              builtin_sparse_checkout_init_options,
 312                              builtin_sparse_checkout_init_usage, 0);
 313
 314         if (init_opts.cone_mode) {
 315                 mode = MODE_CONE_PATTERNS;
 316                 core_sparse_checkout_cone = 1;
 317         } else
 318                 mode = MODE_ALL_PATTERNS;
 319
 320         if (set_config(mode))
 321                 return 1;
 322
 323         memset(&pl, 0, sizeof(pl));
 324
 325         sparse_filename = get_sparse_checkout_filename();
 326         res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL);
 327
 328         /* If we already have a sparse-checkout file, use it. */
 329         if (res >= 0) {
 330                 free(sparse_filename);
 331                 core_apply_sparse_checkout = 1;
 332                 return update_working_directory(NULL);
 333         }
 334
 335         if (get_oid("HEAD", &oid)) {
 336                 FILE *fp;
 337
 338                 /* assume we are in a fresh repo, but update the sparse-checkout file */
 339                 fp = xfopen(sparse_filename, "w");
 340                 if (!fp)
 341                         die(_("failed to open '%s'"), sparse_filename);
 342
 343                 free(sparse_filename);
 344                 fprintf(fp, "/*\n!/*/\n");
 345                 fclose(fp);
 346                 return 0;
 347         }
 348
 349         strbuf_addstr(&pattern, "/*");
 350         add_pattern(strbuf_detach(&pattern, NULL), empty_base, 0, &pl, 0);
 351         strbuf_addstr(&pattern, "!/*/");
 352         add_pattern(strbuf_detach(&pattern, NULL), empty_base, 0, &pl, 0);
 353
 354         return write_patterns_and_update(&pl);
 355 }
 356
 357 static void insert_recursive_pattern(struct pattern_list *pl, struct strbuf *path)
 358 {
 359         struct pattern_entry *e = xmalloc(sizeof(*e));
 360         e->patternlen = path->len;
 361         e->pattern = strbuf_detach(path, NULL);
 362         hashmap_entry_init(&e->ent,
 363                            ignore_case ?
 364                            strihash(e->pattern) :
 365                            strhash(e->pattern));
 366
 367         hashmap_add(&pl->recursive_hashmap, &e->ent);
 368
 369         while (e->patternlen) {
 370                 char *slash = strrchr(e->pattern, '/');
 371                 char *oldpattern = e->pattern;
 372                 size_t newlen;
 373
 374                 if (slash == e->pattern)
 375                         break;
 376
 377                 newlen = slash - e->pattern;
 378                 e = xmalloc(sizeof(struct pattern_entry));
 379                 e->patternlen = newlen;
 380                 e->pattern = xstrndup(oldpattern, newlen);
 381                 hashmap_entry_init(&e->ent,
 382                                    ignore_case ?
 383                                    strihash(e->pattern) :
 384                                    strhash(e->pattern));
 385
 386                 if (!hashmap_get_entry(&pl->parent_hashmap, e, ent, NULL))
 387                         hashmap_add(&pl->parent_hashmap, &e->ent);
 388         }
 389 }
 390
 391 static void strbuf_to_cone_pattern(struct strbuf *line, struct pattern_list *pl)
 392 {
 393         strbuf_trim(line);
 394
 395         strbuf_trim_trailing_dir_sep(line);
 396
 397         if (!line->len)
 398                 return;
 399
 400         if (line->buf[0] != '/')
 401                 strbuf_insert(line, 0, "/", 1);
 402
 403         insert_recursive_pattern(pl, line);
 404 }
 405
 406 static char const * const builtin_sparse_checkout_set_usage[] = {
 407         N_("git sparse-checkout set (--stdin | <patterns>)"),
 408         NULL
 409 };
 410
 411 static struct sparse_checkout_set_opts {
 412         int use_stdin;
 413 } set_opts;
 414
 415 static void add_patterns_from_input(struct pattern_list *pl,
 416                                     int argc, const char **argv)
 417 {
 418         int i;
 419         if (core_sparse_checkout_cone) {
 420                 struct strbuf line = STRBUF_INIT;
 421
 422                 hashmap_init(&pl->recursive_hashmap, pl_hashmap_cmp, NULL, 0);
 423                 hashmap_init(&pl->parent_hashmap, pl_hashmap_cmp, NULL, 0);
 424                 pl->use_cone_patterns = 1;
 425
 426                 if (set_opts.use_stdin) {
 427                         struct strbuf unquoted = STRBUF_INIT;
 428                         while (!strbuf_getline(&line, stdin)) {
 429                                 if (line.buf[0] == '"') {
 430                                         strbuf_reset(&unquoted);
 431                                         if (unquote_c_style(&unquoted, line.buf, NULL))
 432                                                 die(_("unable to unquote C-style string '%s'"),
 433                                                 line.buf);
 434
 435                                         strbuf_swap(&unquoted, &line);
 436                                 }
 437
 438                                 strbuf_to_cone_pattern(&line, pl);
 439                         }
 440
 441                         strbuf_release(&unquoted);
 442                 } else {
 443                         for (i = 0; i < argc; i++) {
 444                                 strbuf_setlen(&line, 0);
 445                                 strbuf_addstr(&line, argv[i]);
 446                                 strbuf_to_cone_pattern(&line, pl);
 447                         }
 448                 }
 449         } else {
 450                 if (set_opts.use_stdin) {
 451                         struct strbuf line = STRBUF_INIT;
 452
 453                         while (!strbuf_getline(&line, stdin)) {
 454                                 size_t len;
 455                                 char *buf = strbuf_detach(&line, &len);
 456                                 add_pattern(buf, empty_base, 0, pl, 0);
 457                         }
 458                 } else {
 459                         for (i = 0; i < argc; i++)
 460                                 add_pattern(argv[i], empty_base, 0, pl, 0);
 461                 }
 462         }
 463 }
 464
 465 static int sparse_checkout_set(int argc, const char **argv, const char *prefix)
 466 {
 467         struct pattern_list pl;
 468         int result;
 469         int changed_config = 0;
 470
 471         static struct option builtin_sparse_checkout_set_options[] = {
 472                 OPT_BOOL(0, "stdin", &set_opts.use_stdin,
 473                          N_("read patterns from standard in")),
 474                 OPT_END(),
 475         };
 476
 477         repo_read_index(the_repository);
 478         require_clean_work_tree(the_repository,
 479                                 N_("set sparse-checkout patterns"), NULL, 1, 0);
 480
 481         memset(&pl, 0, sizeof(pl));
 482
 483         argc = parse_options(argc, argv, prefix,
 484                              builtin_sparse_checkout_set_options,
 485                              builtin_sparse_checkout_set_usage,
 486                              PARSE_OPT_KEEP_UNKNOWN);
 487
 488         add_patterns_from_input(&pl, argc, argv);
 489
 490         if (!core_apply_sparse_checkout) {
 491                 set_config(MODE_ALL_PATTERNS);
 492                 core_apply_sparse_checkout = 1;
 493                 changed_config = 1;
 494         }
 495
 496         result = write_patterns_and_update(&pl);
 497
 498         if (result && changed_config)
 499                 set_config(MODE_NO_PATTERNS);
 500
 501         clear_pattern_list(&pl);
 502         return result;
 503 }
 504
 505 static int sparse_checkout_disable(int argc, const char **argv)
 506 {
 507         struct pattern_list pl;
 508         struct strbuf match_all = STRBUF_INIT;
 509
 510         repo_read_index(the_repository);
 511         require_clean_work_tree(the_repository,
 512                                 N_("disable sparse-checkout"), NULL, 1, 0);
 513
 514         memset(&pl, 0, sizeof(pl));
 515         hashmap_init(&pl.recursive_hashmap, pl_hashmap_cmp, NULL, 0);
 516         hashmap_init(&pl.parent_hashmap, pl_hashmap_cmp, NULL, 0);
 517         pl.use_cone_patterns = 0;
 518         core_apply_sparse_checkout = 1;
 519
 520         strbuf_addstr(&match_all, "/*");
 521         add_pattern(strbuf_detach(&match_all, NULL), empty_base, 0, &pl, 0);
 522
 523         if (update_working_directory(&pl))
 524                 die(_("error while refreshing working directory"));
 525
 526         clear_pattern_list(&pl);
 527         return set_config(MODE_NO_PATTERNS);
 528 }
 529
 530 int cmd_sparse_checkout(int argc, const char **argv, const char *prefix)
 531 {
 532         static struct option builtin_sparse_checkout_options[] = {
 533                 OPT_END(),
 534         };
 535
 536         if (argc == 2 && !strcmp(argv[1], "-h"))
 537                 usage_with_options(builtin_sparse_checkout_usage,
 538                                    builtin_sparse_checkout_options);
 539
 540         argc = parse_options(argc, argv, prefix,
 541                              builtin_sparse_checkout_options,
 542                              builtin_sparse_checkout_usage,
 543                              PARSE_OPT_STOP_AT_NON_OPTION);
 544
 545         git_config(git_default_config, NULL);
 546
 547         if (argc > 0) {
 548                 if (!strcmp(argv[0], "list"))
 549                         return sparse_checkout_list(argc, argv);
 550                 if (!strcmp(argv[0], "init"))
 551                         return sparse_checkout_init(argc, argv);
 552                 if (!strcmp(argv[0], "set"))
 553                         return sparse_checkout_set(argc, argv, prefix);
 554                 if (!strcmp(argv[0], "disable"))
 555                         return sparse_checkout_disable(argc, argv);
 556         }
 557
 558         usage_with_options(builtin_sparse_checkout_usage,
 559                            builtin_sparse_checkout_options);
 560 }