git.oblomov.eu Git - git/blob - builtin/submodule--helper.c

   1 #include "builtin.h"
   2 #include "repository.h"
   3 #include "cache.h"
   4 #include "config.h"
   5 #include "parse-options.h"
   6 #include "quote.h"
   7 #include "pathspec.h"
   8 #include "dir.h"
   9 #include "submodule.h"
  10 #include "submodule-config.h"
  11 #include "string-list.h"
  12 #include "run-command.h"
  13 #include "remote.h"
  14 #include "refs.h"
  15 #include "refspec.h"
  16 #include "connect.h"
  17 #include "revision.h"
  18 #include "diffcore.h"
  19 #include "diff.h"
  20 #include "object-store.h"
  21
  22 #define OPT_QUIET (1 << 0)
  23 #define OPT_CACHED (1 << 1)
  24 #define OPT_RECURSIVE (1 << 2)
  25 #define OPT_FORCE (1 << 3)
  26
  27 typedef void (*each_submodule_fn)(const struct cache_entry *list_item,
  28                                   void *cb_data);
  29
  30 static char *get_default_remote(void)
  31 {
  32         char *dest = NULL, *ret;
  33         struct strbuf sb = STRBUF_INIT;
  34         const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
  35
  36         if (!refname)
  37                 die(_("No such ref: %s"), "HEAD");
  38
  39         /* detached HEAD */
  40         if (!strcmp(refname, "HEAD"))
  41                 return xstrdup("origin");
  42
  43         if (!skip_prefix(refname, "refs/heads/", &refname))
  44                 die(_("Expecting a full ref name, got %s"), refname);
  45
  46         strbuf_addf(&sb, "branch.%s.remote", refname);
  47         if (git_config_get_string(sb.buf, &dest))
  48                 ret = xstrdup("origin");
  49         else
  50                 ret = dest;
  51
  52         strbuf_release(&sb);
  53         return ret;
  54 }
  55
  56 static int print_default_remote(int argc, const char **argv, const char *prefix)
  57 {
  58         char *remote;
  59
  60         if (argc != 1)
  61                 die(_("submodule--helper print-default-remote takes no arguments"));
  62
  63         remote = get_default_remote();
  64         if (remote)
  65                 printf("%s\n", remote);
  66
  67         free(remote);
  68         return 0;
  69 }
  70
  71 static int starts_with_dot_slash(const char *str)
  72 {
  73         return str[0] == '.' && is_dir_sep(str[1]);
  74 }
  75
  76 static int starts_with_dot_dot_slash(const char *str)
  77 {
  78         return str[0] == '.' && str[1] == '.' && is_dir_sep(str[2]);
  79 }
  80
  81 /*
  82  * Returns 1 if it was the last chop before ':'.
  83  */
  84 static int chop_last_dir(char **remoteurl, int is_relative)
  85 {
  86         char *rfind = find_last_dir_sep(*remoteurl);
  87         if (rfind) {
  88                 *rfind = '\0';
  89                 return 0;
  90         }
  91
  92         rfind = strrchr(*remoteurl, ':');
  93         if (rfind) {
  94                 *rfind = '\0';
  95                 return 1;
  96         }
  97
  98         if (is_relative || !strcmp(".", *remoteurl))
  99                 die(_("cannot strip one component off url '%s'"),
 100                         *remoteurl);
 101
 102         free(*remoteurl);
 103         *remoteurl = xstrdup(".");
 104         return 0;
 105 }
 106
 107 /*
 108  * The `url` argument is the URL that navigates to the submodule origin
 109  * repo. When relative, this URL is relative to the superproject origin
 110  * URL repo. The `up_path` argument, if specified, is the relative
 111  * path that navigates from the submodule working tree to the superproject
 112  * working tree. Returns the origin URL of the submodule.
 113  *
 114  * Return either an absolute URL or filesystem path (if the superproject
 115  * origin URL is an absolute URL or filesystem path, respectively) or a
 116  * relative file system path (if the superproject origin URL is a relative
 117  * file system path).
 118  *
 119  * When the output is a relative file system path, the path is either
 120  * relative to the submodule working tree, if up_path is specified, or to
 121  * the superproject working tree otherwise.
 122  *
 123  * NEEDSWORK: This works incorrectly on the domain and protocol part.
 124  * remote_url      url              outcome          expectation
 125  * http://a.com/b  ../c             http://a.com/c   as is
 126  * http://a.com/b/ ../c             http://a.com/c   same as previous line, but
 127  *                                                   ignore trailing slash in url
 128  * http://a.com/b  ../../c          http://c         error out
 129  * http://a.com/b  ../../../c       http:/c          error out
 130  * http://a.com/b  ../../../../c    http:c           error out
 131  * http://a.com/b  ../../../../../c    .:c           error out
 132  * NEEDSWORK: Given how chop_last_dir() works, this function is broken
 133  * when a local part has a colon in its path component, too.
 134  */
 135 static char *relative_url(const char *remote_url,
 136                                 const char *url,
 137                                 const char *up_path)
 138 {
 139         int is_relative = 0;
 140         int colonsep = 0;
 141         char *out;
 142         char *remoteurl = xstrdup(remote_url);
 143         struct strbuf sb = STRBUF_INIT;
 144         size_t len = strlen(remoteurl);
 145
 146         if (is_dir_sep(remoteurl[len-1]))
 147                 remoteurl[len-1] = '\0';
 148
 149         if (!url_is_local_not_ssh(remoteurl) || is_absolute_path(remoteurl))
 150                 is_relative = 0;
 151         else {
 152                 is_relative = 1;
 153                 /*
 154                  * Prepend a './' to ensure all relative
 155                  * remoteurls start with './' or '../'
 156                  */
 157                 if (!starts_with_dot_slash(remoteurl) &&
 158                     !starts_with_dot_dot_slash(remoteurl)) {
 159                         strbuf_reset(&sb);
 160                         strbuf_addf(&sb, "./%s", remoteurl);
 161                         free(remoteurl);
 162                         remoteurl = strbuf_detach(&sb, NULL);
 163                 }
 164         }
 165         /*
 166          * When the url starts with '../', remove that and the
 167          * last directory in remoteurl.
 168          */
 169         while (url) {
 170                 if (starts_with_dot_dot_slash(url)) {
 171                         url += 3;
 172                         colonsep |= chop_last_dir(&remoteurl, is_relative);
 173                 } else if (starts_with_dot_slash(url))
 174                         url += 2;
 175                 else
 176                         break;
 177         }
 178         strbuf_reset(&sb);
 179         strbuf_addf(&sb, "%s%s%s", remoteurl, colonsep ? ":" : "/", url);
 180         if (ends_with(url, "/"))
 181                 strbuf_setlen(&sb, sb.len - 1);
 182         free(remoteurl);
 183
 184         if (starts_with_dot_slash(sb.buf))
 185                 out = xstrdup(sb.buf + 2);
 186         else
 187                 out = xstrdup(sb.buf);
 188         strbuf_reset(&sb);
 189
 190         if (!up_path || !is_relative)
 191                 return out;
 192
 193         strbuf_addf(&sb, "%s%s", up_path, out);
 194         free(out);
 195         return strbuf_detach(&sb, NULL);
 196 }
 197
 198 static int resolve_relative_url(int argc, const char **argv, const char *prefix)
 199 {
 200         char *remoteurl = NULL;
 201         char *remote = get_default_remote();
 202         const char *up_path = NULL;
 203         char *res;
 204         const char *url;
 205         struct strbuf sb = STRBUF_INIT;
 206
 207         if (argc != 2 && argc != 3)
 208                 die("resolve-relative-url only accepts one or two arguments");
 209
 210         url = argv[1];
 211         strbuf_addf(&sb, "remote.%s.url", remote);
 212         free(remote);
 213
 214         if (git_config_get_string(sb.buf, &remoteurl))
 215                 /* the repository is its own authoritative upstream */
 216                 remoteurl = xgetcwd();
 217
 218         if (argc == 3)
 219                 up_path = argv[2];
 220
 221         res = relative_url(remoteurl, url, up_path);
 222         puts(res);
 223         free(res);
 224         free(remoteurl);
 225         return 0;
 226 }
 227
 228 static int resolve_relative_url_test(int argc, const char **argv, const char *prefix)
 229 {
 230         char *remoteurl, *res;
 231         const char *up_path, *url;
 232
 233         if (argc != 4)
 234                 die("resolve-relative-url-test only accepts three arguments: <up_path> <remoteurl> <url>");
 235
 236         up_path = argv[1];
 237         remoteurl = xstrdup(argv[2]);
 238         url = argv[3];
 239
 240         if (!strcmp(up_path, "(null)"))
 241                 up_path = NULL;
 242
 243         res = relative_url(remoteurl, url, up_path);
 244         puts(res);
 245         free(res);
 246         free(remoteurl);
 247         return 0;
 248 }
 249
 250 /* the result should be freed by the caller. */
 251 static char *get_submodule_displaypath(const char *path, const char *prefix)
 252 {
 253         const char *super_prefix = get_super_prefix();
 254
 255         if (prefix && super_prefix) {
 256                 BUG("cannot have prefix '%s' and superprefix '%s'",
 257                     prefix, super_prefix);
 258         } else if (prefix) {
 259                 struct strbuf sb = STRBUF_INIT;
 260                 char *displaypath = xstrdup(relative_path(path, prefix, &sb));
 261                 strbuf_release(&sb);
 262                 return displaypath;
 263         } else if (super_prefix) {
 264                 return xstrfmt("%s%s", super_prefix, path);
 265         } else {
 266                 return xstrdup(path);
 267         }
 268 }
 269
 270 static char *compute_rev_name(const char *sub_path, const char* object_id)
 271 {
 272         struct strbuf sb = STRBUF_INIT;
 273         const char ***d;
 274
 275         static const char *describe_bare[] = { NULL };
 276
 277         static const char *describe_tags[] = { "--tags", NULL };
 278
 279         static const char *describe_contains[] = { "--contains", NULL };
 280
 281         static const char *describe_all_always[] = { "--all", "--always", NULL };
 282
 283         static const char **describe_argv[] = { describe_bare, describe_tags,
 284                                                 describe_contains,
 285                                                 describe_all_always, NULL };
 286
 287         for (d = describe_argv; *d; d++) {
 288                 struct child_process cp = CHILD_PROCESS_INIT;
 289                 prepare_submodule_repo_env(&cp.env_array);
 290                 cp.dir = sub_path;
 291                 cp.git_cmd = 1;
 292                 cp.no_stderr = 1;
 293
 294                 argv_array_push(&cp.args, "describe");
 295                 argv_array_pushv(&cp.args, *d);
 296                 argv_array_push(&cp.args, object_id);
 297
 298                 if (!capture_command(&cp, &sb, 0)) {
 299                         strbuf_strip_suffix(&sb, "\n");
 300                         return strbuf_detach(&sb, NULL);
 301                 }
 302         }
 303
 304         strbuf_release(&sb);
 305         return NULL;
 306 }
 307
 308 struct module_list {
 309         const struct cache_entry **entries;
 310         int alloc, nr;
 311 };
 312 #define MODULE_LIST_INIT { NULL, 0, 0 }
 313
 314 static int module_list_compute(int argc, const char **argv,
 315                                const char *prefix,
 316                                struct pathspec *pathspec,
 317                                struct module_list *list)
 318 {
 319         int i, result = 0;
 320         char *ps_matched = NULL;
 321         parse_pathspec(pathspec, 0,
 322                        PATHSPEC_PREFER_FULL,
 323                        prefix, argv);
 324
 325         if (pathspec->nr)
 326                 ps_matched = xcalloc(pathspec->nr, 1);
 327
 328         if (read_cache() < 0)
 329                 die(_("index file corrupt"));
 330
 331         for (i = 0; i < active_nr; i++) {
 332                 const struct cache_entry *ce = active_cache[i];
 333
 334                 if (!match_pathspec(&the_index, pathspec, ce->name, ce_namelen(ce),
 335                                     0, ps_matched, 1) ||
 336                     !S_ISGITLINK(ce->ce_mode))
 337                         continue;
 338
 339                 ALLOC_GROW(list->entries, list->nr + 1, list->alloc);
 340                 list->entries[list->nr++] = ce;
 341                 while (i + 1 < active_nr &&
 342                        !strcmp(ce->name, active_cache[i + 1]->name))
 343                         /*
 344                          * Skip entries with the same name in different stages
 345                          * to make sure an entry is returned only once.
 346                          */
 347                         i++;
 348         }
 349
 350         if (ps_matched && report_path_error(ps_matched, pathspec, prefix))
 351                 result = -1;
 352
 353         free(ps_matched);
 354
 355         return result;
 356 }
 357
 358 static void module_list_active(struct module_list *list)
 359 {
 360         int i;
 361         struct module_list active_modules = MODULE_LIST_INIT;
 362
 363         for (i = 0; i < list->nr; i++) {
 364                 const struct cache_entry *ce = list->entries[i];
 365
 366                 if (!is_submodule_active(the_repository, ce->name))
 367                         continue;
 368
 369                 ALLOC_GROW(active_modules.entries,
 370                            active_modules.nr + 1,
 371                            active_modules.alloc);
 372                 active_modules.entries[active_modules.nr++] = ce;
 373         }
 374
 375         free(list->entries);
 376         *list = active_modules;
 377 }
 378
 379 static char *get_up_path(const char *path)
 380 {
 381         int i;
 382         struct strbuf sb = STRBUF_INIT;
 383
 384         for (i = count_slashes(path); i; i--)
 385                 strbuf_addstr(&sb, "../");
 386
 387         /*
 388          * Check if 'path' ends with slash or not
 389          * for having the same output for dir/sub_dir
 390          * and dir/sub_dir/
 391          */
 392         if (!is_dir_sep(path[strlen(path) - 1]))
 393                 strbuf_addstr(&sb, "../");
 394
 395         return strbuf_detach(&sb, NULL);
 396 }
 397
 398 static int module_list(int argc, const char **argv, const char *prefix)
 399 {
 400         int i;
 401         struct pathspec pathspec;
 402         struct module_list list = MODULE_LIST_INIT;
 403
 404         struct option module_list_options[] = {
 405                 OPT_STRING(0, "prefix", &prefix,
 406                            N_("path"),
 407                            N_("alternative anchor for relative paths")),
 408                 OPT_END()
 409         };
 410
 411         const char *const git_submodule_helper_usage[] = {
 412                 N_("git submodule--helper list [--prefix=<path>] [<path>...]"),
 413                 NULL
 414         };
 415
 416         argc = parse_options(argc, argv, prefix, module_list_options,
 417                              git_submodule_helper_usage, 0);
 418
 419         if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
 420                 return 1;
 421
 422         for (i = 0; i < list.nr; i++) {
 423                 const struct cache_entry *ce = list.entries[i];
 424
 425                 if (ce_stage(ce))
 426                         printf("%06o %s U\t", ce->ce_mode, sha1_to_hex(null_sha1));
 427                 else
 428                         printf("%06o %s %d\t", ce->ce_mode,
 429                                oid_to_hex(&ce->oid), ce_stage(ce));
 430
 431                 fprintf(stdout, "%s\n", ce->name);
 432         }
 433         return 0;
 434 }
 435
 436 static void for_each_listed_submodule(const struct module_list *list,
 437                                       each_submodule_fn fn, void *cb_data)
 438 {
 439         int i;
 440         for (i = 0; i < list->nr; i++)
 441                 fn(list->entries[i], cb_data);
 442 }
 443
 444 struct cb_foreach {
 445         int argc;
 446         const char **argv;
 447         const char *prefix;
 448         int quiet;
 449         int recursive;
 450 };
 451 #define CB_FOREACH_INIT { 0 }
 452
 453 static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
 454                                        void *cb_data)
 455 {
 456         struct cb_foreach *info = cb_data;
 457         const char *path = list_item->name;
 458         const struct object_id *ce_oid = &list_item->oid;
 459
 460         const struct submodule *sub;
 461         struct child_process cp = CHILD_PROCESS_INIT;
 462         char *displaypath;
 463
 464         displaypath = get_submodule_displaypath(path, info->prefix);
 465
 466         sub = submodule_from_path(the_repository, &null_oid, path);
 467
 468         if (!sub)
 469                 die(_("No url found for submodule path '%s' in .gitmodules"),
 470                         displaypath);
 471
 472         if (!is_submodule_populated_gently(path, NULL))
 473                 goto cleanup;
 474
 475         prepare_submodule_repo_env(&cp.env_array);
 476
 477         /*
 478          * For the purpose of executing <command> in the submodule,
 479          * separate shell is used for the purpose of running the
 480          * child process.
 481          */
 482         cp.use_shell = 1;
 483         cp.dir = path;
 484
 485         /*
 486          * NEEDSWORK: the command currently has access to the variables $name,
 487          * $sm_path, $displaypath, $sha1 and $toplevel only when the command
 488          * contains a single argument. This is done for maintaining a faithful
 489          * translation from shell script.
 490          */
 491         if (info->argc == 1) {
 492                 char *toplevel = xgetcwd();
 493                 struct strbuf sb = STRBUF_INIT;
 494
 495                 argv_array_pushf(&cp.env_array, "name=%s", sub->name);
 496                 argv_array_pushf(&cp.env_array, "sm_path=%s", path);
 497                 argv_array_pushf(&cp.env_array, "displaypath=%s", displaypath);
 498                 argv_array_pushf(&cp.env_array, "sha1=%s",
 499                                 oid_to_hex(ce_oid));
 500                 argv_array_pushf(&cp.env_array, "toplevel=%s", toplevel);
 501
 502                 /*
 503                  * Since the path variable was accessible from the script
 504                  * before porting, it is also made available after porting.
 505                  * The environment variable "PATH" has a very special purpose
 506                  * on windows. And since environment variables are
 507                  * case-insensitive in windows, it interferes with the
 508                  * existing PATH variable. Hence, to avoid that, we expose
 509                  * path via the args argv_array and not via env_array.
 510                  */
 511                 sq_quote_buf(&sb, path);
 512                 argv_array_pushf(&cp.args, "path=%s; %s",
 513                                  sb.buf, info->argv[0]);
 514                 strbuf_release(&sb);
 515                 free(toplevel);
 516         } else {
 517                 argv_array_pushv(&cp.args, info->argv);
 518         }
 519
 520         if (!info->quiet)
 521                 printf(_("Entering '%s'\n"), displaypath);
 522
 523         if (info->argv[0] && run_command(&cp))
 524                 die(_("run_command returned non-zero status for %s\n."),
 525                         displaypath);
 526
 527         if (info->recursive) {
 528                 struct child_process cpr = CHILD_PROCESS_INIT;
 529
 530                 cpr.git_cmd = 1;
 531                 cpr.dir = path;
 532                 prepare_submodule_repo_env(&cpr.env_array);
 533
 534                 argv_array_pushl(&cpr.args, "--super-prefix", NULL);
 535                 argv_array_pushf(&cpr.args, "%s/", displaypath);
 536                 argv_array_pushl(&cpr.args, "submodule--helper", "foreach", "--recursive",
 537                                 NULL);
 538
 539                 if (info->quiet)
 540                         argv_array_push(&cpr.args, "--quiet");
 541
 542                 argv_array_pushv(&cpr.args, info->argv);
 543
 544                 if (run_command(&cpr))
 545                         die(_("run_command returned non-zero status while "
 546                                 "recursing in the nested submodules of %s\n."),
 547                                 displaypath);
 548         }
 549
 550 cleanup:
 551         free(displaypath);
 552 }
 553
 554 static int module_foreach(int argc, const char **argv, const char *prefix)
 555 {
 556         struct cb_foreach info = CB_FOREACH_INIT;
 557         struct pathspec pathspec;
 558         struct module_list list = MODULE_LIST_INIT;
 559
 560         struct option module_foreach_options[] = {
 561                 OPT__QUIET(&info.quiet, N_("Suppress output of entering each submodule command")),
 562                 OPT_BOOL(0, "recursive", &info.recursive,
 563                          N_("Recurse into nested submodules")),
 564                 OPT_END()
 565         };
 566
 567         const char *const git_submodule_helper_usage[] = {
 568                 N_("git submodule--helper foreach [--quiet] [--recursive] <command>"),
 569                 NULL
 570         };
 571
 572         argc = parse_options(argc, argv, prefix, module_foreach_options,
 573                              git_submodule_helper_usage, PARSE_OPT_KEEP_UNKNOWN);
 574
 575         if (module_list_compute(0, NULL, prefix, &pathspec, &list) < 0)
 576                 return 1;
 577
 578         info.argc = argc;
 579         info.argv = argv;
 580         info.prefix = prefix;
 581
 582         for_each_listed_submodule(&list, runcommand_in_submodule_cb, &info);
 583
 584         return 0;
 585 }
 586
 587 struct init_cb {
 588         const char *prefix;
 589         unsigned int flags;
 590 };
 591
 592 #define INIT_CB_INIT { NULL, 0 }
 593
 594 static void init_submodule(const char *path, const char *prefix,
 595                            unsigned int flags)
 596 {
 597         const struct submodule *sub;
 598         struct strbuf sb = STRBUF_INIT;
 599         char *upd = NULL, *url = NULL, *displaypath;
 600
 601         displaypath = get_submodule_displaypath(path, prefix);
 602
 603         sub = submodule_from_path(the_repository, &null_oid, path);
 604
 605         if (!sub)
 606                 die(_("No url found for submodule path '%s' in .gitmodules"),
 607                         displaypath);
 608
 609         /*
 610          * NEEDSWORK: In a multi-working-tree world, this needs to be
 611          * set in the per-worktree config.
 612          *
 613          * Set active flag for the submodule being initialized
 614          */
 615         if (!is_submodule_active(the_repository, path)) {
 616                 strbuf_addf(&sb, "submodule.%s.active", sub->name);
 617                 git_config_set_gently(sb.buf, "true");
 618                 strbuf_reset(&sb);
 619         }
 620
 621         /*
 622          * Copy url setting when it is not set yet.
 623          * To look up the url in .git/config, we must not fall back to
 624          * .gitmodules, so look it up directly.
 625          */
 626         strbuf_addf(&sb, "submodule.%s.url", sub->name);
 627         if (git_config_get_string(sb.buf, &url)) {
 628                 if (!sub->url)
 629                         die(_("No url found for submodule path '%s' in .gitmodules"),
 630                                 displaypath);
 631
 632                 url = xstrdup(sub->url);
 633
 634                 /* Possibly a url relative to parent */
 635                 if (starts_with_dot_dot_slash(url) ||
 636                     starts_with_dot_slash(url)) {
 637                         char *remoteurl, *relurl;
 638                         char *remote = get_default_remote();
 639                         struct strbuf remotesb = STRBUF_INIT;
 640                         strbuf_addf(&remotesb, "remote.%s.url", remote);
 641                         free(remote);
 642
 643                         if (git_config_get_string(remotesb.buf, &remoteurl)) {
 644                                 warning(_("could not lookup configuration '%s'. Assuming this repository is its own authoritative upstream."), remotesb.buf);
 645                                 remoteurl = xgetcwd();
 646                         }
 647                         relurl = relative_url(remoteurl, url, NULL);
 648                         strbuf_release(&remotesb);
 649                         free(remoteurl);
 650                         free(url);
 651                         url = relurl;
 652                 }
 653
 654                 if (git_config_set_gently(sb.buf, url))
 655                         die(_("Failed to register url for submodule path '%s'"),
 656                             displaypath);
 657                 if (!(flags & OPT_QUIET))
 658                         fprintf(stderr,
 659                                 _("Submodule '%s' (%s) registered for path '%s'\n"),
 660                                 sub->name, url, displaypath);
 661         }
 662         strbuf_reset(&sb);
 663
 664         /* Copy "update" setting when it is not set yet */
 665         strbuf_addf(&sb, "submodule.%s.update", sub->name);
 666         if (git_config_get_string(sb.buf, &upd) &&
 667             sub->update_strategy.type != SM_UPDATE_UNSPECIFIED) {
 668                 if (sub->update_strategy.type == SM_UPDATE_COMMAND) {
 669                         fprintf(stderr, _("warning: command update mode suggested for submodule '%s'\n"),
 670                                 sub->name);
 671                         upd = xstrdup("none");
 672                 } else
 673                         upd = xstrdup(submodule_strategy_to_string(&sub->update_strategy));
 674
 675                 if (git_config_set_gently(sb.buf, upd))
 676                         die(_("Failed to register update mode for submodule path '%s'"), displaypath);
 677         }
 678         strbuf_release(&sb);
 679         free(displaypath);
 680         free(url);
 681         free(upd);
 682 }
 683
 684 static void init_submodule_cb(const struct cache_entry *list_item, void *cb_data)
 685 {
 686         struct init_cb *info = cb_data;
 687         init_submodule(list_item->name, info->prefix, info->flags);
 688 }
 689
 690 static int module_init(int argc, const char **argv, const char *prefix)
 691 {
 692         struct init_cb info = INIT_CB_INIT;
 693         struct pathspec pathspec;
 694         struct module_list list = MODULE_LIST_INIT;
 695         int quiet = 0;
 696
 697         struct option module_init_options[] = {
 698                 OPT__QUIET(&quiet, N_("Suppress output for initializing a submodule")),
 699                 OPT_END()
 700         };
 701
 702         const char *const git_submodule_helper_usage[] = {
 703                 N_("git submodule--helper init [<path>]"),
 704                 NULL
 705         };
 706
 707         argc = parse_options(argc, argv, prefix, module_init_options,
 708                              git_submodule_helper_usage, 0);
 709
 710         if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
 711                 return 1;
 712
 713         /*
 714          * If there are no path args and submodule.active is set then,
 715          * by default, only initialize 'active' modules.
 716          */
 717         if (!argc && git_config_get_value_multi("submodule.active"))
 718                 module_list_active(&list);
 719
 720         info.prefix = prefix;
 721         if (quiet)
 722                 info.flags |= OPT_QUIET;
 723
 724         for_each_listed_submodule(&list, init_submodule_cb, &info);
 725
 726         return 0;
 727 }
 728
 729 struct status_cb {
 730         const char *prefix;
 731         unsigned int flags;
 732 };
 733
 734 #define STATUS_CB_INIT { NULL, 0 }
 735
 736 static void print_status(unsigned int flags, char state, const char *path,
 737                          const struct object_id *oid, const char *displaypath)
 738 {
 739         if (flags & OPT_QUIET)
 740                 return;
 741
 742         printf("%c%s %s", state, oid_to_hex(oid), displaypath);
 743
 744         if (state == ' ' || state == '+') {
 745                 const char *name = compute_rev_name(path, oid_to_hex(oid));
 746
 747                 if (name)
 748                         printf(" (%s)", name);
 749         }
 750
 751         printf("\n");
 752 }
 753
 754 static int handle_submodule_head_ref(const char *refname,
 755                                      const struct object_id *oid, int flags,
 756                                      void *cb_data)
 757 {
 758         struct object_id *output = cb_data;
 759         if (oid)
 760                 oidcpy(output, oid);
 761
 762         return 0;
 763 }
 764
 765 static void status_submodule(const char *path, const struct object_id *ce_oid,
 766                              unsigned int ce_flags, const char *prefix,
 767                              unsigned int flags)
 768 {
 769         char *displaypath;
 770         struct argv_array diff_files_args = ARGV_ARRAY_INIT;
 771         struct rev_info rev;
 772         int diff_files_result;
 773
 774         if (!submodule_from_path(the_repository, &null_oid, path))
 775                 die(_("no submodule mapping found in .gitmodules for path '%s'"),
 776                       path);
 777
 778         displaypath = get_submodule_displaypath(path, prefix);
 779
 780         if ((CE_STAGEMASK & ce_flags) >> CE_STAGESHIFT) {
 781                 print_status(flags, 'U', path, &null_oid, displaypath);
 782                 goto cleanup;
 783         }
 784
 785         if (!is_submodule_active(the_repository, path)) {
 786                 print_status(flags, '-', path, ce_oid, displaypath);
 787                 goto cleanup;
 788         }
 789
 790         argv_array_pushl(&diff_files_args, "diff-files",
 791                          "--ignore-submodules=dirty", "--quiet", "--",
 792                          path, NULL);
 793
 794         git_config(git_diff_basic_config, NULL);
 795         init_revisions(&rev, prefix);
 796         rev.abbrev = 0;
 797         diff_files_args.argc = setup_revisions(diff_files_args.argc,
 798                                                diff_files_args.argv,
 799                                                &rev, NULL);
 800         diff_files_result = run_diff_files(&rev, 0);
 801
 802         if (!diff_result_code(&rev.diffopt, diff_files_result)) {
 803                 print_status(flags, ' ', path, ce_oid,
 804                              displaypath);
 805         } else if (!(flags & OPT_CACHED)) {
 806                 struct object_id oid;
 807                 struct ref_store *refs = get_submodule_ref_store(path);
 808
 809                 if (!refs) {
 810                         print_status(flags, '-', path, ce_oid, displaypath);
 811                         goto cleanup;
 812                 }
 813                 if (refs_head_ref(refs, handle_submodule_head_ref, &oid))
 814                         die(_("could not resolve HEAD ref inside the "
 815                               "submodule '%s'"), path);
 816
 817                 print_status(flags, '+', path, &oid, displaypath);
 818         } else {
 819                 print_status(flags, '+', path, ce_oid, displaypath);
 820         }
 821
 822         if (flags & OPT_RECURSIVE) {
 823                 struct child_process cpr = CHILD_PROCESS_INIT;
 824
 825                 cpr.git_cmd = 1;
 826                 cpr.dir = path;
 827                 prepare_submodule_repo_env(&cpr.env_array);
 828
 829                 argv_array_push(&cpr.args, "--super-prefix");
 830                 argv_array_pushf(&cpr.args, "%s/", displaypath);
 831                 argv_array_pushl(&cpr.args, "submodule--helper", "status",
 832                                  "--recursive", NULL);
 833
 834                 if (flags & OPT_CACHED)
 835                         argv_array_push(&cpr.args, "--cached");
 836
 837                 if (flags & OPT_QUIET)
 838                         argv_array_push(&cpr.args, "--quiet");
 839
 840                 if (run_command(&cpr))
 841                         die(_("failed to recurse into submodule '%s'"), path);
 842         }
 843
 844 cleanup:
 845         argv_array_clear(&diff_files_args);
 846         free(displaypath);
 847 }
 848
 849 static void status_submodule_cb(const struct cache_entry *list_item,
 850                                 void *cb_data)
 851 {
 852         struct status_cb *info = cb_data;
 853         status_submodule(list_item->name, &list_item->oid, list_item->ce_flags,
 854                          info->prefix, info->flags);
 855 }
 856
 857 static int module_status(int argc, const char **argv, const char *prefix)
 858 {
 859         struct status_cb info = STATUS_CB_INIT;
 860         struct pathspec pathspec;
 861         struct module_list list = MODULE_LIST_INIT;
 862         int quiet = 0;
 863
 864         struct option module_status_options[] = {
 865                 OPT__QUIET(&quiet, N_("Suppress submodule status output")),
 866                 OPT_BIT(0, "cached", &info.flags, N_("Use commit stored in the index instead of the one stored in the submodule HEAD"), OPT_CACHED),
 867                 OPT_BIT(0, "recursive", &info.flags, N_("recurse into nested submodules"), OPT_RECURSIVE),
 868                 OPT_END()
 869         };
 870
 871         const char *const git_submodule_helper_usage[] = {
 872                 N_("git submodule status [--quiet] [--cached] [--recursive] [<path>...]"),
 873                 NULL
 874         };
 875
 876         argc = parse_options(argc, argv, prefix, module_status_options,
 877                              git_submodule_helper_usage, 0);
 878
 879         if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
 880                 return 1;
 881
 882         info.prefix = prefix;
 883         if (quiet)
 884                 info.flags |= OPT_QUIET;
 885
 886         for_each_listed_submodule(&list, status_submodule_cb, &info);
 887
 888         return 0;
 889 }
 890
 891 static int module_name(int argc, const char **argv, const char *prefix)
 892 {
 893         const struct submodule *sub;
 894
 895         if (argc != 2)
 896                 usage(_("git submodule--helper name <path>"));
 897
 898         sub = submodule_from_path(the_repository, &null_oid, argv[1]);
 899
 900         if (!sub)
 901                 die(_("no submodule mapping found in .gitmodules for path '%s'"),
 902                     argv[1]);
 903
 904         printf("%s\n", sub->name);
 905
 906         return 0;
 907 }
 908
 909 struct sync_cb {
 910         const char *prefix;
 911         unsigned int flags;
 912 };
 913
 914 #define SYNC_CB_INIT { NULL, 0 }
 915
 916 static void sync_submodule(const char *path, const char *prefix,
 917                            unsigned int flags)
 918 {
 919         const struct submodule *sub;
 920         char *remote_key = NULL;
 921         char *sub_origin_url, *super_config_url, *displaypath;
 922         struct strbuf sb = STRBUF_INIT;
 923         struct child_process cp = CHILD_PROCESS_INIT;
 924         char *sub_config_path = NULL;
 925
 926         if (!is_submodule_active(the_repository, path))
 927                 return;
 928
 929         sub = submodule_from_path(the_repository, &null_oid, path);
 930
 931         if (sub && sub->url) {
 932                 if (starts_with_dot_dot_slash(sub->url) ||
 933                     starts_with_dot_slash(sub->url)) {
 934                         char *remote_url, *up_path;
 935                         char *remote = get_default_remote();
 936                         strbuf_addf(&sb, "remote.%s.url", remote);
 937
 938                         if (git_config_get_string(sb.buf, &remote_url))
 939                                 remote_url = xgetcwd();
 940
 941                         up_path = get_up_path(path);
 942                         sub_origin_url = relative_url(remote_url, sub->url, up_path);
 943                         super_config_url = relative_url(remote_url, sub->url, NULL);
 944
 945                         free(remote);
 946                         free(up_path);
 947                         free(remote_url);
 948                 } else {
 949                         sub_origin_url = xstrdup(sub->url);
 950                         super_config_url = xstrdup(sub->url);
 951                 }
 952         } else {
 953                 sub_origin_url = xstrdup("");
 954                 super_config_url = xstrdup("");
 955         }
 956
 957         displaypath = get_submodule_displaypath(path, prefix);
 958
 959         if (!(flags & OPT_QUIET))
 960                 printf(_("Synchronizing submodule url for '%s'\n"),
 961                          displaypath);
 962
 963         strbuf_reset(&sb);
 964         strbuf_addf(&sb, "submodule.%s.url", sub->name);
 965         if (git_config_set_gently(sb.buf, super_config_url))
 966                 die(_("failed to register url for submodule path '%s'"),
 967                       displaypath);
 968
 969         if (!is_submodule_populated_gently(path, NULL))
 970                 goto cleanup;
 971
 972         prepare_submodule_repo_env(&cp.env_array);
 973         cp.git_cmd = 1;
 974         cp.dir = path;
 975         argv_array_pushl(&cp.args, "submodule--helper",
 976                          "print-default-remote", NULL);
 977
 978         strbuf_reset(&sb);
 979         if (capture_command(&cp, &sb, 0))
 980                 die(_("failed to get the default remote for submodule '%s'"),
 981                       path);
 982
 983         strbuf_strip_suffix(&sb, "\n");
 984         remote_key = xstrfmt("remote.%s.url", sb.buf);
 985
 986         strbuf_reset(&sb);
 987         submodule_to_gitdir(&sb, path);
 988         strbuf_addstr(&sb, "/config");
 989
 990         if (git_config_set_in_file_gently(sb.buf, remote_key, sub_origin_url))
 991                 die(_("failed to update remote for submodule '%s'"),
 992                       path);
 993
 994         if (flags & OPT_RECURSIVE) {
 995                 struct child_process cpr = CHILD_PROCESS_INIT;
 996
 997                 cpr.git_cmd = 1;
 998                 cpr.dir = path;
 999                 prepare_submodule_repo_env(&cpr.env_array);
1000
1001                 argv_array_push(&cpr.args, "--super-prefix");
1002                 argv_array_pushf(&cpr.args, "%s/", displaypath);
1003                 argv_array_pushl(&cpr.args, "submodule--helper", "sync",
1004                                  "--recursive", NULL);
1005
1006                 if (flags & OPT_QUIET)
1007                         argv_array_push(&cpr.args, "--quiet");
1008
1009                 if (run_command(&cpr))
1010                         die(_("failed to recurse into submodule '%s'"),
1011                               path);
1012         }
1013
1014 cleanup:
1015         free(super_config_url);
1016         free(sub_origin_url);
1017         strbuf_release(&sb);
1018         free(remote_key);
1019         free(displaypath);
1020         free(sub_config_path);
1021 }
1022
1023 static void sync_submodule_cb(const struct cache_entry *list_item, void *cb_data)
1024 {
1025         struct sync_cb *info = cb_data;
1026         sync_submodule(list_item->name, info->prefix, info->flags);
1027 }
1028
1029 static int module_sync(int argc, const char **argv, const char *prefix)
1030 {
1031         struct sync_cb info = SYNC_CB_INIT;
1032         struct pathspec pathspec;
1033         struct module_list list = MODULE_LIST_INIT;
1034         int quiet = 0;
1035         int recursive = 0;
1036
1037         struct option module_sync_options[] = {
1038                 OPT__QUIET(&quiet, N_("Suppress output of synchronizing submodule url")),
1039                 OPT_BOOL(0, "recursive", &recursive,
1040                         N_("Recurse into nested submodules")),
1041                 OPT_END()
1042         };
1043
1044         const char *const git_submodule_helper_usage[] = {
1045                 N_("git submodule--helper sync [--quiet] [--recursive] [<path>]"),
1046                 NULL
1047         };
1048
1049         argc = parse_options(argc, argv, prefix, module_sync_options,
1050                              git_submodule_helper_usage, 0);
1051
1052         if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1053                 return 1;
1054
1055         info.prefix = prefix;
1056         if (quiet)
1057                 info.flags |= OPT_QUIET;
1058         if (recursive)
1059                 info.flags |= OPT_RECURSIVE;
1060
1061         for_each_listed_submodule(&list, sync_submodule_cb, &info);
1062
1063         return 0;
1064 }
1065
1066 struct deinit_cb {
1067         const char *prefix;
1068         unsigned int flags;
1069 };
1070 #define DEINIT_CB_INIT { NULL, 0 }
1071
1072 static void deinit_submodule(const char *path, const char *prefix,
1073                              unsigned int flags)
1074 {
1075         const struct submodule *sub;
1076         char *displaypath = NULL;
1077         struct child_process cp_config = CHILD_PROCESS_INIT;
1078         struct strbuf sb_config = STRBUF_INIT;
1079         char *sub_git_dir = xstrfmt("%s/.git", path);
1080
1081         sub = submodule_from_path(the_repository, &null_oid, path);
1082
1083         if (!sub || !sub->name)
1084                 goto cleanup;
1085
1086         displaypath = get_submodule_displaypath(path, prefix);
1087
1088         /* remove the submodule work tree (unless the user already did it) */
1089         if (is_directory(path)) {
1090                 struct strbuf sb_rm = STRBUF_INIT;
1091                 const char *format;
1092
1093                 /*
1094                  * protect submodules containing a .git directory
1095                  * NEEDSWORK: instead of dying, automatically call
1096                  * absorbgitdirs and (possibly) warn.
1097                  */
1098                 if (is_directory(sub_git_dir))
1099                         die(_("Submodule work tree '%s' contains a .git "
1100                               "directory (use 'rm -rf' if you really want "
1101                               "to remove it including all of its history)"),
1102                             displaypath);
1103
1104                 if (!(flags & OPT_FORCE)) {
1105                         struct child_process cp_rm = CHILD_PROCESS_INIT;
1106                         cp_rm.git_cmd = 1;
1107                         argv_array_pushl(&cp_rm.args, "rm", "-qn",
1108                                          path, NULL);
1109
1110                         if (run_command(&cp_rm))
1111                                 die(_("Submodule work tree '%s' contains local "
1112                                       "modifications; use '-f' to discard them"),
1113                                       displaypath);
1114                 }
1115
1116                 strbuf_addstr(&sb_rm, path);
1117
1118                 if (!remove_dir_recursively(&sb_rm, 0))
1119                         format = _("Cleared directory '%s'\n");
1120                 else
1121                         format = _("Could not remove submodule work tree '%s'\n");
1122
1123                 if (!(flags & OPT_QUIET))
1124                         printf(format, displaypath);
1125
1126                 submodule_unset_core_worktree(sub);
1127
1128                 strbuf_release(&sb_rm);
1129         }
1130
1131         if (mkdir(path, 0777))
1132                 printf(_("could not create empty submodule directory %s"),
1133                       displaypath);
1134
1135         cp_config.git_cmd = 1;
1136         argv_array_pushl(&cp_config.args, "config", "--get-regexp", NULL);
1137         argv_array_pushf(&cp_config.args, "submodule.%s\\.", sub->name);
1138
1139         /* remove the .git/config entries (unless the user already did it) */
1140         if (!capture_command(&cp_config, &sb_config, 0) && sb_config.len) {
1141                 char *sub_key = xstrfmt("submodule.%s", sub->name);
1142                 /*
1143                  * remove the whole section so we have a clean state when
1144                  * the user later decides to init this submodule again
1145                  */
1146                 git_config_rename_section_in_file(NULL, sub_key, NULL);
1147                 if (!(flags & OPT_QUIET))
1148                         printf(_("Submodule '%s' (%s) unregistered for path '%s'\n"),
1149                                  sub->name, sub->url, displaypath);
1150                 free(sub_key);
1151         }
1152
1153 cleanup:
1154         free(displaypath);
1155         free(sub_git_dir);
1156         strbuf_release(&sb_config);
1157 }
1158
1159 static void deinit_submodule_cb(const struct cache_entry *list_item,
1160                                 void *cb_data)
1161 {
1162         struct deinit_cb *info = cb_data;
1163         deinit_submodule(list_item->name, info->prefix, info->flags);
1164 }
1165
1166 static int module_deinit(int argc, const char **argv, const char *prefix)
1167 {
1168         struct deinit_cb info = DEINIT_CB_INIT;
1169         struct pathspec pathspec;
1170         struct module_list list = MODULE_LIST_INIT;
1171         int quiet = 0;
1172         int force = 0;
1173         int all = 0;
1174
1175         struct option module_deinit_options[] = {
1176                 OPT__QUIET(&quiet, N_("Suppress submodule status output")),
1177                 OPT__FORCE(&force, N_("Remove submodule working trees even if they contain local changes"), 0),
1178                 OPT_BOOL(0, "all", &all, N_("Unregister all submodules")),
1179                 OPT_END()
1180         };
1181
1182         const char *const git_submodule_helper_usage[] = {
1183                 N_("git submodule deinit [--quiet] [-f | --force] [--all | [--] [<path>...]]"),
1184                 NULL
1185         };
1186
1187         argc = parse_options(argc, argv, prefix, module_deinit_options,
1188                              git_submodule_helper_usage, 0);
1189
1190         if (all && argc) {
1191                 error("pathspec and --all are incompatible");
1192                 usage_with_options(git_submodule_helper_usage,
1193                                    module_deinit_options);
1194         }
1195
1196         if (!argc && !all)
1197                 die(_("Use '--all' if you really want to deinitialize all submodules"));
1198
1199         if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1200                 return 1;
1201
1202         info.prefix = prefix;
1203         if (quiet)
1204                 info.flags |= OPT_QUIET;
1205         if (force)
1206                 info.flags |= OPT_FORCE;
1207
1208         for_each_listed_submodule(&list, deinit_submodule_cb, &info);
1209
1210         return 0;
1211 }
1212
1213 static int clone_submodule(const char *path, const char *gitdir, const char *url,
1214                            const char *depth, struct string_list *reference, int dissociate,
1215                            int quiet, int progress)
1216 {
1217         struct child_process cp = CHILD_PROCESS_INIT;
1218
1219         argv_array_push(&cp.args, "clone");
1220         argv_array_push(&cp.args, "--no-checkout");
1221         if (quiet)
1222                 argv_array_push(&cp.args, "--quiet");
1223         if (progress)
1224                 argv_array_push(&cp.args, "--progress");
1225         if (depth && *depth)
1226                 argv_array_pushl(&cp.args, "--depth", depth, NULL);
1227         if (reference->nr) {
1228                 struct string_list_item *item;
1229                 for_each_string_list_item(item, reference)
1230                         argv_array_pushl(&cp.args, "--reference",
1231                                          item->string, NULL);
1232         }
1233         if (dissociate)
1234                 argv_array_push(&cp.args, "--dissociate");
1235         if (gitdir && *gitdir)
1236                 argv_array_pushl(&cp.args, "--separate-git-dir", gitdir, NULL);
1237
1238         argv_array_push(&cp.args, url);
1239         argv_array_push(&cp.args, path);
1240
1241         cp.git_cmd = 1;
1242         prepare_submodule_repo_env(&cp.env_array);
1243         cp.no_stdin = 1;
1244
1245         return run_command(&cp);
1246 }
1247
1248 struct submodule_alternate_setup {
1249         const char *submodule_name;
1250         enum SUBMODULE_ALTERNATE_ERROR_MODE {
1251                 SUBMODULE_ALTERNATE_ERROR_DIE,
1252                 SUBMODULE_ALTERNATE_ERROR_INFO,
1253                 SUBMODULE_ALTERNATE_ERROR_IGNORE
1254         } error_mode;
1255         struct string_list *reference;
1256 };
1257 #define SUBMODULE_ALTERNATE_SETUP_INIT { NULL, \
1258         SUBMODULE_ALTERNATE_ERROR_IGNORE, NULL }
1259
1260 static int add_possible_reference_from_superproject(
1261                 struct alternate_object_database *alt, void *sas_cb)
1262 {
1263         struct submodule_alternate_setup *sas = sas_cb;
1264
1265         /*
1266          * If the alternate object store is another repository, try the
1267          * standard layout with .git/(modules/<name>)+/objects
1268          */
1269         if (ends_with(alt->path, "/objects")) {
1270                 char *sm_alternate;
1271                 struct strbuf sb = STRBUF_INIT;
1272                 struct strbuf err = STRBUF_INIT;
1273                 strbuf_add(&sb, alt->path, strlen(alt->path) - strlen("objects"));
1274
1275                 /*
1276                  * We need to end the new path with '/' to mark it as a dir,
1277                  * otherwise a submodule name containing '/' will be broken
1278                  * as the last part of a missing submodule reference would
1279                  * be taken as a file name.
1280                  */
1281                 strbuf_addf(&sb, "modules/%s/", sas->submodule_name);
1282
1283                 sm_alternate = compute_alternate_path(sb.buf, &err);
1284                 if (sm_alternate) {
1285                         string_list_append(sas->reference, xstrdup(sb.buf));
1286                         free(sm_alternate);
1287                 } else {
1288                         switch (sas->error_mode) {
1289                         case SUBMODULE_ALTERNATE_ERROR_DIE:
1290                                 die(_("submodule '%s' cannot add alternate: %s"),
1291                                     sas->submodule_name, err.buf);
1292                         case SUBMODULE_ALTERNATE_ERROR_INFO:
1293                                 fprintf(stderr, _("submodule '%s' cannot add alternate: %s"),
1294                                         sas->submodule_name, err.buf);
1295                         case SUBMODULE_ALTERNATE_ERROR_IGNORE:
1296                                 ; /* nothing */
1297                         }
1298                 }
1299                 strbuf_release(&sb);
1300         }
1301
1302         return 0;
1303 }
1304
1305 static void prepare_possible_alternates(const char *sm_name,
1306                 struct string_list *reference)
1307 {
1308         char *sm_alternate = NULL, *error_strategy = NULL;
1309         struct submodule_alternate_setup sas = SUBMODULE_ALTERNATE_SETUP_INIT;
1310
1311         git_config_get_string("submodule.alternateLocation", &sm_alternate);
1312         if (!sm_alternate)
1313                 return;
1314
1315         git_config_get_string("submodule.alternateErrorStrategy", &error_strategy);
1316
1317         if (!error_strategy)
1318                 error_strategy = xstrdup("die");
1319
1320         sas.submodule_name = sm_name;
1321         sas.reference = reference;
1322         if (!strcmp(error_strategy, "die"))
1323                 sas.error_mode = SUBMODULE_ALTERNATE_ERROR_DIE;
1324         else if (!strcmp(error_strategy, "info"))
1325                 sas.error_mode = SUBMODULE_ALTERNATE_ERROR_INFO;
1326         else if (!strcmp(error_strategy, "ignore"))
1327                 sas.error_mode = SUBMODULE_ALTERNATE_ERROR_IGNORE;
1328         else
1329                 die(_("Value '%s' for submodule.alternateErrorStrategy is not recognized"), error_strategy);
1330
1331         if (!strcmp(sm_alternate, "superproject"))
1332                 foreach_alt_odb(add_possible_reference_from_superproject, &sas);
1333         else if (!strcmp(sm_alternate, "no"))
1334                 ; /* do nothing */
1335         else
1336                 die(_("Value '%s' for submodule.alternateLocation is not recognized"), sm_alternate);
1337
1338         free(sm_alternate);
1339         free(error_strategy);
1340 }
1341
1342 static int module_clone(int argc, const char **argv, const char *prefix)
1343 {
1344         const char *name = NULL, *url = NULL, *depth = NULL;
1345         int quiet = 0;
1346         int progress = 0;
1347         char *p, *path = NULL, *sm_gitdir;
1348         struct strbuf sb = STRBUF_INIT;
1349         struct string_list reference = STRING_LIST_INIT_NODUP;
1350         int dissociate = 0;
1351         char *sm_alternate = NULL, *error_strategy = NULL;
1352
1353         struct option module_clone_options[] = {
1354                 OPT_STRING(0, "prefix", &prefix,
1355                            N_("path"),
1356                            N_("alternative anchor for relative paths")),
1357                 OPT_STRING(0, "path", &path,
1358                            N_("path"),
1359                            N_("where the new submodule will be cloned to")),
1360                 OPT_STRING(0, "name", &name,
1361                            N_("string"),
1362                            N_("name of the new submodule")),
1363                 OPT_STRING(0, "url", &url,
1364                            N_("string"),
1365                            N_("url where to clone the submodule from")),
1366                 OPT_STRING_LIST(0, "reference", &reference,
1367                            N_("repo"),
1368                            N_("reference repository")),
1369                 OPT_BOOL(0, "dissociate", &dissociate,
1370                            N_("use --reference only while cloning")),
1371                 OPT_STRING(0, "depth", &depth,
1372                            N_("string"),
1373                            N_("depth for shallow clones")),
1374                 OPT__QUIET(&quiet, "Suppress output for cloning a submodule"),
1375                 OPT_BOOL(0, "progress", &progress,
1376                            N_("force cloning progress")),
1377                 OPT_END()
1378         };
1379
1380         const char *const git_submodule_helper_usage[] = {
1381                 N_("git submodule--helper clone [--prefix=<path>] [--quiet] "
1382                    "[--reference <repository>] [--name <name>] [--depth <depth>] "
1383                    "--url <url> --path <path>"),
1384                 NULL
1385         };
1386
1387         argc = parse_options(argc, argv, prefix, module_clone_options,
1388                              git_submodule_helper_usage, 0);
1389
1390         if (argc || !url || !path || !*path)
1391                 usage_with_options(git_submodule_helper_usage,
1392                                    module_clone_options);
1393
1394         strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
1395         sm_gitdir = absolute_pathdup(sb.buf);
1396         strbuf_reset(&sb);
1397
1398         if (!is_absolute_path(path)) {
1399                 strbuf_addf(&sb, "%s/%s", get_git_work_tree(), path);
1400                 path = strbuf_detach(&sb, NULL);
1401         } else
1402                 path = xstrdup(path);
1403
1404         if (!file_exists(sm_gitdir)) {
1405                 if (safe_create_leading_directories_const(sm_gitdir) < 0)
1406                         die(_("could not create directory '%s'"), sm_gitdir);
1407
1408                 prepare_possible_alternates(name, &reference);
1409
1410                 if (clone_submodule(path, sm_gitdir, url, depth, &reference, dissociate,
1411                                     quiet, progress))
1412                         die(_("clone of '%s' into submodule path '%s' failed"),
1413                             url, path);
1414         } else {
1415                 if (safe_create_leading_directories_const(path) < 0)
1416                         die(_("could not create directory '%s'"), path);
1417                 strbuf_addf(&sb, "%s/index", sm_gitdir);
1418                 unlink_or_warn(sb.buf);
1419                 strbuf_reset(&sb);
1420         }
1421
1422         connect_work_tree_and_git_dir(path, sm_gitdir, 0);
1423
1424         p = git_pathdup_submodule(path, "config");
1425         if (!p)
1426                 die(_("could not get submodule directory for '%s'"), path);
1427
1428         /* setup alternateLocation and alternateErrorStrategy in the cloned submodule if needed */
1429         git_config_get_string("submodule.alternateLocation", &sm_alternate);
1430         if (sm_alternate)
1431                 git_config_set_in_file(p, "submodule.alternateLocation",
1432                                            sm_alternate);
1433         git_config_get_string("submodule.alternateErrorStrategy", &error_strategy);
1434         if (error_strategy)
1435                 git_config_set_in_file(p, "submodule.alternateErrorStrategy",
1436                                            error_strategy);
1437
1438         free(sm_alternate);
1439         free(error_strategy);
1440
1441         strbuf_release(&sb);
1442         free(sm_gitdir);
1443         free(path);
1444         free(p);
1445         return 0;
1446 }
1447
1448 struct submodule_update_clone {
1449         /* index into 'list', the list of submodules to look into for cloning */
1450         int current;
1451         struct module_list list;
1452         unsigned warn_if_uninitialized : 1;
1453
1454         /* update parameter passed via commandline */
1455         struct submodule_update_strategy update;
1456
1457         /* configuration parameters which are passed on to the children */
1458         int progress;
1459         int quiet;
1460         int recommend_shallow;
1461         struct string_list references;
1462         int dissociate;
1463         const char *depth;
1464         const char *recursive_prefix;
1465         const char *prefix;
1466
1467         /* Machine-readable status lines to be consumed by git-submodule.sh */
1468         struct string_list projectlines;
1469
1470         /* If we want to stop as fast as possible and return an error */
1471         unsigned quickstop : 1;
1472
1473         /* failed clones to be retried again */
1474         const struct cache_entry **failed_clones;
1475         int failed_clones_nr, failed_clones_alloc;
1476 };
1477 #define SUBMODULE_UPDATE_CLONE_INIT {0, MODULE_LIST_INIT, 0, \
1478         SUBMODULE_UPDATE_STRATEGY_INIT, 0, 0, -1, STRING_LIST_INIT_DUP, 0, \
1479         NULL, NULL, NULL, \
1480         STRING_LIST_INIT_DUP, 0, NULL, 0, 0}
1481
1482
1483 static void next_submodule_warn_missing(struct submodule_update_clone *suc,
1484                 struct strbuf *out, const char *displaypath)
1485 {
1486         /*
1487          * Only mention uninitialized submodules when their
1488          * paths have been specified.
1489          */
1490         if (suc->warn_if_uninitialized) {
1491                 strbuf_addf(out,
1492                         _("Submodule path '%s' not initialized"),
1493                         displaypath);
1494                 strbuf_addch(out, '\n');
1495                 strbuf_addstr(out,
1496                         _("Maybe you want to use 'update --init'?"));
1497                 strbuf_addch(out, '\n');
1498         }
1499 }
1500
1501 /**
1502  * Determine whether 'ce' needs to be cloned. If so, prepare the 'child' to
1503  * run the clone. Returns 1 if 'ce' needs to be cloned, 0 otherwise.
1504  */
1505 static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
1506                                            struct child_process *child,
1507                                            struct submodule_update_clone *suc,
1508                                            struct strbuf *out)
1509 {
1510         const struct submodule *sub = NULL;
1511         const char *url = NULL;
1512         const char *update_string;
1513         enum submodule_update_type update_type;
1514         char *key;
1515         struct strbuf displaypath_sb = STRBUF_INIT;
1516         struct strbuf sb = STRBUF_INIT;
1517         const char *displaypath = NULL;
1518         int needs_cloning = 0;
1519
1520         if (ce_stage(ce)) {
1521                 if (suc->recursive_prefix)
1522                         strbuf_addf(&sb, "%s/%s", suc->recursive_prefix, ce->name);
1523                 else
1524                         strbuf_addstr(&sb, ce->name);
1525                 strbuf_addf(out, _("Skipping unmerged submodule %s"), sb.buf);
1526                 strbuf_addch(out, '\n');
1527                 goto cleanup;
1528         }
1529
1530         sub = submodule_from_path(the_repository, &null_oid, ce->name);
1531
1532         if (suc->recursive_prefix)
1533                 displaypath = relative_path(suc->recursive_prefix,
1534                                             ce->name, &displaypath_sb);
1535         else
1536                 displaypath = ce->name;
1537
1538         if (!sub) {
1539                 next_submodule_warn_missing(suc, out, displaypath);
1540                 goto cleanup;
1541         }
1542
1543         key = xstrfmt("submodule.%s.update", sub->name);
1544         if (!repo_config_get_string_const(the_repository, key, &update_string)) {
1545                 update_type = parse_submodule_update_type(update_string);
1546         } else {
1547                 update_type = sub->update_strategy.type;
1548         }
1549         free(key);
1550
1551         if (suc->update.type == SM_UPDATE_NONE
1552             || (suc->update.type == SM_UPDATE_UNSPECIFIED
1553                 && update_type == SM_UPDATE_NONE)) {
1554                 strbuf_addf(out, _("Skipping submodule '%s'"), displaypath);
1555                 strbuf_addch(out, '\n');
1556                 goto cleanup;
1557         }
1558
1559         /* Check if the submodule has been initialized. */
1560         if (!is_submodule_active(the_repository, ce->name)) {
1561                 next_submodule_warn_missing(suc, out, displaypath);
1562                 goto cleanup;
1563         }
1564
1565         strbuf_reset(&sb);
1566         strbuf_addf(&sb, "submodule.%s.url", sub->name);
1567         if (repo_config_get_string_const(the_repository, sb.buf, &url))
1568                 url = sub->url;
1569
1570         strbuf_reset(&sb);
1571         strbuf_addf(&sb, "%s/.git", ce->name);
1572         needs_cloning = !file_exists(sb.buf);
1573
1574         strbuf_reset(&sb);
1575         strbuf_addf(&sb, "%06o %s %d %d\t%s\n", ce->ce_mode,
1576                         oid_to_hex(&ce->oid), ce_stage(ce),
1577                         needs_cloning, ce->name);
1578         string_list_append(&suc->projectlines, sb.buf);
1579
1580         if (!needs_cloning)
1581                 goto cleanup;
1582
1583         child->git_cmd = 1;
1584         child->no_stdin = 1;
1585         child->stdout_to_stderr = 1;
1586         child->err = -1;
1587         argv_array_push(&child->args, "submodule--helper");
1588         argv_array_push(&child->args, "clone");
1589         if (suc->progress)
1590                 argv_array_push(&child->args, "--progress");
1591         if (suc->quiet)
1592                 argv_array_push(&child->args, "--quiet");
1593         if (suc->prefix)
1594                 argv_array_pushl(&child->args, "--prefix", suc->prefix, NULL);
1595         if (suc->recommend_shallow && sub->recommend_shallow == 1)
1596                 argv_array_push(&child->args, "--depth=1");
1597         argv_array_pushl(&child->args, "--path", sub->path, NULL);
1598         argv_array_pushl(&child->args, "--name", sub->name, NULL);
1599         argv_array_pushl(&child->args, "--url", url, NULL);
1600         if (suc->references.nr) {
1601                 struct string_list_item *item;
1602                 for_each_string_list_item(item, &suc->references)
1603                         argv_array_pushl(&child->args, "--reference", item->string, NULL);
1604         }
1605         if (suc->dissociate)
1606                 argv_array_push(&child->args, "--dissociate");
1607         if (suc->depth)
1608                 argv_array_push(&child->args, suc->depth);
1609
1610 cleanup:
1611         strbuf_reset(&displaypath_sb);
1612         strbuf_reset(&sb);
1613
1614         return needs_cloning;
1615 }
1616
1617 static int update_clone_get_next_task(struct child_process *child,
1618                                       struct strbuf *err,
1619                                       void *suc_cb,
1620                                       void **idx_task_cb)
1621 {
1622         struct submodule_update_clone *suc = suc_cb;
1623         const struct cache_entry *ce;
1624         int index;
1625
1626         for (; suc->current < suc->list.nr; suc->current++) {
1627                 ce = suc->list.entries[suc->current];
1628                 if (prepare_to_clone_next_submodule(ce, child, suc, err)) {
1629                         int *p = xmalloc(sizeof(*p));
1630                         *p = suc->current;
1631                         *idx_task_cb = p;
1632                         suc->current++;
1633                         return 1;
1634                 }
1635         }
1636
1637         /*
1638          * The loop above tried cloning each submodule once, now try the
1639          * stragglers again, which we can imagine as an extension of the
1640          * entry list.
1641          */
1642         index = suc->current - suc->list.nr;
1643         if (index < suc->failed_clones_nr) {
1644                 int *p;
1645                 ce = suc->failed_clones[index];
1646                 if (!prepare_to_clone_next_submodule(ce, child, suc, err)) {
1647                         suc->current ++;
1648                         strbuf_addstr(err, "BUG: submodule considered for "
1649                                            "cloning, doesn't need cloning "
1650                                            "any more?\n");
1651                         return 0;
1652                 }
1653                 p = xmalloc(sizeof(*p));
1654                 *p = suc->current;
1655                 *idx_task_cb = p;
1656                 suc->current ++;
1657                 return 1;
1658         }
1659
1660         return 0;
1661 }
1662
1663 static int update_clone_start_failure(struct strbuf *err,
1664                                       void *suc_cb,
1665                                       void *idx_task_cb)
1666 {
1667         struct submodule_update_clone *suc = suc_cb;
1668         suc->quickstop = 1;
1669         return 1;
1670 }
1671
1672 static int update_clone_task_finished(int result,
1673                                       struct strbuf *err,
1674                                       void *suc_cb,
1675                                       void *idx_task_cb)
1676 {
1677         const struct cache_entry *ce;
1678         struct submodule_update_clone *suc = suc_cb;
1679
1680         int *idxP = idx_task_cb;
1681         int idx = *idxP;
1682         free(idxP);
1683
1684         if (!result)
1685                 return 0;
1686
1687         if (idx < suc->list.nr) {
1688                 ce  = suc->list.entries[idx];
1689                 strbuf_addf(err, _("Failed to clone '%s'. Retry scheduled"),
1690                             ce->name);
1691                 strbuf_addch(err, '\n');
1692                 ALLOC_GROW(suc->failed_clones,
1693                            suc->failed_clones_nr + 1,
1694                            suc->failed_clones_alloc);
1695                 suc->failed_clones[suc->failed_clones_nr++] = ce;
1696                 return 0;
1697         } else {
1698                 idx -= suc->list.nr;
1699                 ce  = suc->failed_clones[idx];
1700                 strbuf_addf(err, _("Failed to clone '%s' a second time, aborting"),
1701                             ce->name);
1702                 strbuf_addch(err, '\n');
1703                 suc->quickstop = 1;
1704                 return 1;
1705         }
1706
1707         return 0;
1708 }
1709
1710 static int git_update_clone_config(const char *var, const char *value,
1711                                    void *cb)
1712 {
1713         int *max_jobs = cb;
1714         if (!strcmp(var, "submodule.fetchjobs"))
1715                 *max_jobs = parse_submodule_fetchjobs(var, value);
1716         return 0;
1717 }
1718
1719 static int update_clone(int argc, const char **argv, const char *prefix)
1720 {
1721         const char *update = NULL;
1722         int max_jobs = 1;
1723         struct string_list_item *item;
1724         struct pathspec pathspec;
1725         struct submodule_update_clone suc = SUBMODULE_UPDATE_CLONE_INIT;
1726
1727         struct option module_update_clone_options[] = {
1728                 OPT_STRING(0, "prefix", &prefix,
1729                            N_("path"),
1730                            N_("path into the working tree")),
1731                 OPT_STRING(0, "recursive-prefix", &suc.recursive_prefix,
1732                            N_("path"),
1733                            N_("path into the working tree, across nested "
1734                               "submodule boundaries")),
1735                 OPT_STRING(0, "update", &update,
1736                            N_("string"),
1737                            N_("rebase, merge, checkout or none")),
1738                 OPT_STRING_LIST(0, "reference", &suc.references, N_("repo"),
1739                            N_("reference repository")),
1740                 OPT_BOOL(0, "dissociate", &suc.dissociate,
1741                            N_("use --reference only while cloning")),
1742                 OPT_STRING(0, "depth", &suc.depth, "<depth>",
1743                            N_("Create a shallow clone truncated to the "
1744                               "specified number of revisions")),
1745                 OPT_INTEGER('j', "jobs", &max_jobs,
1746                             N_("parallel jobs")),
1747                 OPT_BOOL(0, "recommend-shallow", &suc.recommend_shallow,
1748                             N_("whether the initial clone should follow the shallow recommendation")),
1749                 OPT__QUIET(&suc.quiet, N_("don't print cloning progress")),
1750                 OPT_BOOL(0, "progress", &suc.progress,
1751                             N_("force cloning progress")),
1752                 OPT_END()
1753         };
1754
1755         const char *const git_submodule_helper_usage[] = {
1756                 N_("git submodule--helper update_clone [--prefix=<path>] [<path>...]"),
1757                 NULL
1758         };
1759         suc.prefix = prefix;
1760
1761         update_clone_config_from_gitmodules(&max_jobs);
1762         git_config(git_update_clone_config, &max_jobs);
1763
1764         argc = parse_options(argc, argv, prefix, module_update_clone_options,
1765                              git_submodule_helper_usage, 0);
1766
1767         if (update)
1768                 if (parse_submodule_update_strategy(update, &suc.update) < 0)
1769                         die(_("bad value for update parameter"));
1770
1771         if (module_list_compute(argc, argv, prefix, &pathspec, &suc.list) < 0)
1772                 return 1;
1773
1774         if (pathspec.nr)
1775                 suc.warn_if_uninitialized = 1;
1776
1777         run_processes_parallel(max_jobs,
1778                                update_clone_get_next_task,
1779                                update_clone_start_failure,
1780                                update_clone_task_finished,
1781                                &suc);
1782
1783         /*
1784          * We saved the output and put it out all at once now.
1785          * That means:
1786          * - the listener does not have to interleave their (checkout)
1787          *   work with our fetching.  The writes involved in a
1788          *   checkout involve more straightforward sequential I/O.
1789          * - the listener can avoid doing any work if fetching failed.
1790          */
1791         if (suc.quickstop)
1792                 return 1;
1793
1794         for_each_string_list_item(item, &suc.projectlines)
1795                 fprintf(stdout, "%s", item->string);
1796
1797         return 0;
1798 }
1799
1800 static int resolve_relative_path(int argc, const char **argv, const char *prefix)
1801 {
1802         struct strbuf sb = STRBUF_INIT;
1803         if (argc != 3)
1804                 die("submodule--helper relative-path takes exactly 2 arguments, got %d", argc);
1805
1806         printf("%s", relative_path(argv[1], argv[2], &sb));
1807         strbuf_release(&sb);
1808         return 0;
1809 }
1810
1811 static const char *remote_submodule_branch(const char *path)
1812 {
1813         const struct submodule *sub;
1814         const char *branch = NULL;
1815         char *key;
1816
1817         sub = submodule_from_path(the_repository, &null_oid, path);
1818         if (!sub)
1819                 return NULL;
1820
1821         key = xstrfmt("submodule.%s.branch", sub->name);
1822         if (repo_config_get_string_const(the_repository, key, &branch))
1823                 branch = sub->branch;
1824         free(key);
1825
1826         if (!branch)
1827                 return "master";
1828
1829         if (!strcmp(branch, ".")) {
1830                 const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
1831
1832                 if (!refname)
1833                         die(_("No such ref: %s"), "HEAD");
1834
1835                 /* detached HEAD */
1836                 if (!strcmp(refname, "HEAD"))
1837                         die(_("Submodule (%s) branch configured to inherit "
1838                               "branch from superproject, but the superproject "
1839                               "is not on any branch"), sub->name);
1840
1841                 if (!skip_prefix(refname, "refs/heads/", &refname))
1842                         die(_("Expecting a full ref name, got %s"), refname);
1843                 return refname;
1844         }
1845
1846         return branch;
1847 }
1848
1849 static int resolve_remote_submodule_branch(int argc, const char **argv,
1850                 const char *prefix)
1851 {
1852         const char *ret;
1853         struct strbuf sb = STRBUF_INIT;
1854         if (argc != 2)
1855                 die("submodule--helper remote-branch takes exactly one arguments, got %d", argc);
1856
1857         ret = remote_submodule_branch(argv[1]);
1858         if (!ret)
1859                 die("submodule %s doesn't exist", argv[1]);
1860
1861         printf("%s", ret);
1862         strbuf_release(&sb);
1863         return 0;
1864 }
1865
1866 static int push_check(int argc, const char **argv, const char *prefix)
1867 {
1868         struct remote *remote;
1869         const char *superproject_head;
1870         char *head;
1871         int detached_head = 0;
1872         struct object_id head_oid;
1873
1874         if (argc < 3)
1875                 die("submodule--helper push-check requires at least 2 arguments");
1876
1877         /*
1878          * superproject's resolved head ref.
1879          * if HEAD then the superproject is in a detached head state, otherwise
1880          * it will be the resolved head ref.
1881          */
1882         superproject_head = argv[1];
1883         argv++;
1884         argc--;
1885         /* Get the submodule's head ref and determine if it is detached */
1886         head = resolve_refdup("HEAD", 0, &head_oid, NULL);
1887         if (!head)
1888                 die(_("Failed to resolve HEAD as a valid ref."));
1889         if (!strcmp(head, "HEAD"))
1890                 detached_head = 1;
1891
1892         /*
1893          * The remote must be configured.
1894          * This is to avoid pushing to the exact same URL as the parent.
1895          */
1896         remote = pushremote_get(argv[1]);
1897         if (!remote || remote->origin == REMOTE_UNCONFIGURED)
1898                 die("remote '%s' not configured", argv[1]);
1899
1900         /* Check the refspec */
1901         if (argc > 2) {
1902                 int i;
1903                 struct ref *local_refs = get_local_heads();
1904                 struct refspec refspec = REFSPEC_INIT_PUSH;
1905
1906                 refspec_appendn(&refspec, argv + 2, argc - 2);
1907
1908                 for (i = 0; i < refspec.nr; i++) {
1909                         const struct refspec_item *rs = &refspec.items[i];
1910
1911                         if (rs->pattern || rs->matching)
1912                                 continue;
1913
1914                         /* LHS must match a single ref */
1915                         switch (count_refspec_match(rs->src, local_refs, NULL)) {
1916                         case 1:
1917                                 break;
1918                         case 0:
1919                                 /*
1920                                  * If LHS matches 'HEAD' then we need to ensure
1921                                  * that it matches the same named branch
1922                                  * checked out in the superproject.
1923                                  */
1924                                 if (!strcmp(rs->src, "HEAD")) {
1925                                         if (!detached_head &&
1926                                             !strcmp(head, superproject_head))
1927                                                 break;
1928                                         die("HEAD does not match the named branch in the superproject");
1929                                 }
1930                                 /* fallthrough */
1931                         default:
1932                                 die("src refspec '%s' must name a ref",
1933                                     rs->src);
1934                         }
1935                 }
1936                 refspec_clear(&refspec);
1937         }
1938         free(head);
1939
1940         return 0;
1941 }
1942
1943 static int absorb_git_dirs(int argc, const char **argv, const char *prefix)
1944 {
1945         int i;
1946         struct pathspec pathspec;
1947         struct module_list list = MODULE_LIST_INIT;
1948         unsigned flags = ABSORB_GITDIR_RECURSE_SUBMODULES;
1949
1950         struct option embed_gitdir_options[] = {
1951                 OPT_STRING(0, "prefix", &prefix,
1952                            N_("path"),
1953                            N_("path into the working tree")),
1954                 OPT_BIT(0, "--recursive", &flags, N_("recurse into submodules"),
1955                         ABSORB_GITDIR_RECURSE_SUBMODULES),
1956                 OPT_END()
1957         };
1958
1959         const char *const git_submodule_helper_usage[] = {
1960                 N_("git submodule--helper embed-git-dir [<path>...]"),
1961                 NULL
1962         };
1963
1964         argc = parse_options(argc, argv, prefix, embed_gitdir_options,
1965                              git_submodule_helper_usage, 0);
1966
1967         if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1968                 return 1;
1969
1970         for (i = 0; i < list.nr; i++)
1971                 absorb_git_dir_into_superproject(prefix,
1972                                 list.entries[i]->name, flags);
1973
1974         return 0;
1975 }
1976
1977 static int is_active(int argc, const char **argv, const char *prefix)
1978 {
1979         if (argc != 2)
1980                 die("submodule--helper is-active takes exactly 1 argument");
1981
1982         return !is_submodule_active(the_repository, argv[1]);
1983 }
1984
1985 /*
1986  * Exit non-zero if any of the submodule names given on the command line is
1987  * invalid. If no names are given, filter stdin to print only valid names
1988  * (which is primarily intended for testing).
1989  */
1990 static int check_name(int argc, const char **argv, const char *prefix)
1991 {
1992         if (argc > 1) {
1993                 while (*++argv) {
1994                         if (check_submodule_name(*argv) < 0)
1995                                 return 1;
1996                 }
1997         } else {
1998                 struct strbuf buf = STRBUF_INIT;
1999                 while (strbuf_getline(&buf, stdin) != EOF) {
2000                         if (!check_submodule_name(buf.buf))
2001                                 printf("%s\n", buf.buf);
2002                 }
2003                 strbuf_release(&buf);
2004         }
2005         return 0;
2006 }
2007
2008 static int connect_gitdir_workingtree(int argc, const char **argv, const char *prefix)
2009 {
2010         struct strbuf sb = STRBUF_INIT;
2011         const char *name, *path;
2012         char *sm_gitdir;
2013
2014         if (argc != 3)
2015                 BUG("submodule--helper connect-gitdir-workingtree <name> <path>");
2016
2017         name = argv[1];
2018         path = argv[2];
2019
2020         strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
2021         sm_gitdir = absolute_pathdup(sb.buf);
2022
2023         connect_work_tree_and_git_dir(path, sm_gitdir, 0);
2024
2025         strbuf_release(&sb);
2026         free(sm_gitdir);
2027
2028         return 0;
2029 }
2030
2031 #define SUPPORT_SUPER_PREFIX (1<<0)
2032
2033 struct cmd_struct {
2034         const char *cmd;
2035         int (*fn)(int, const char **, const char *);
2036         unsigned option;
2037 };
2038
2039 static struct cmd_struct commands[] = {
2040         {"list", module_list, 0},
2041         {"name", module_name, 0},
2042         {"clone", module_clone, 0},
2043         {"update-clone", update_clone, 0},
2044         {"connect-gitdir-workingtree", connect_gitdir_workingtree, 0},
2045         {"relative-path", resolve_relative_path, 0},
2046         {"resolve-relative-url", resolve_relative_url, 0},
2047         {"resolve-relative-url-test", resolve_relative_url_test, 0},
2048         {"foreach", module_foreach, SUPPORT_SUPER_PREFIX},
2049         {"init", module_init, SUPPORT_SUPER_PREFIX},
2050         {"status", module_status, SUPPORT_SUPER_PREFIX},
2051         {"print-default-remote", print_default_remote, 0},
2052         {"sync", module_sync, SUPPORT_SUPER_PREFIX},
2053         {"deinit", module_deinit, 0},
2054         {"remote-branch", resolve_remote_submodule_branch, 0},
2055         {"push-check", push_check, 0},
2056         {"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
2057         {"is-active", is_active, 0},
2058         {"check-name", check_name, 0},
2059 };
2060
2061 int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
2062 {
2063         int i;
2064         if (argc < 2 || !strcmp(argv[1], "-h"))
2065                 usage("git submodule--helper <command>");
2066
2067         for (i = 0; i < ARRAY_SIZE(commands); i++) {
2068                 if (!strcmp(argv[1], commands[i].cmd)) {
2069                         if (get_super_prefix() &&
2070                             !(commands[i].option & SUPPORT_SUPER_PREFIX))
2071                                 die(_("%s doesn't support --super-prefix"),
2072                                     commands[i].cmd);
2073                         return commands[i].fn(argc - 1, argv + 1, prefix);
2074                 }
2075         }
2076
2077         die(_("'%s' is not a valid submodule--helper "
2078               "subcommand"), argv[1]);
2079 }