Andrew's git / gitweb.git / builtin/submodule--helper.c
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builtin / submodule--helper.con commit t/chainlint.sed: drop extra spaces from regex character class (ace64e5)
   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
  27typedef void (*each_submodule_fn)(const struct cache_entry *list_item,
  28                                  void *cb_data);
  29
  30static 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
  56static 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
  71static int starts_with_dot_slash(const char *str)
  72{
  73        return str[0] == '.' && is_dir_sep(str[1]);
  74}
  75
  76static 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 */
  84static 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 */
 135static 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
 198static 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
 228static 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. */
 251static 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
 270static 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
 308struct module_list {
 309        const struct cache_entry **entries;
 310        int alloc, nr;
 311};
 312#define MODULE_LIST_INIT { NULL, 0, 0 }
 313
 314static 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(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
 358static 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
 379static 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
 398static 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
 436static 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
 444struct 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
 453static 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
 550cleanup:
 551        free(displaypath);
 552}
 553
 554static 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
 587struct init_cb {
 588        const char *prefix;
 589        unsigned int flags;
 590};
 591
 592#define INIT_CB_INIT { NULL, 0 }
 593
 594static 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
 684static 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
 690static 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
 729struct status_cb {
 730        const char *prefix;
 731        unsigned int flags;
 732};
 733
 734#define STATUS_CB_INIT { NULL, 0 }
 735
 736static 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
 754static 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
 765static 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
 844cleanup:
 845        argv_array_clear(&diff_files_args);
 846        free(displaypath);
 847}
 848
 849static 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
 857static 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
 891static 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
 909struct sync_cb {
 910        const char *prefix;
 911        unsigned int flags;
 912};
 913
 914#define SYNC_CB_INIT { NULL, 0 }
 915
 916static 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
1014cleanup:
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
1023static 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
1030static int module_sync(int argc, const char **argv, const char *prefix)
1031{
1032        struct sync_cb info = SYNC_CB_INIT;
1033        struct pathspec pathspec;
1034        struct module_list list = MODULE_LIST_INIT;
1035        int quiet = 0;
1036        int recursive = 0;
1037
1038        struct option module_sync_options[] = {
1039                OPT__QUIET(&quiet, N_("Suppress output of synchronizing submodule url")),
1040                OPT_BOOL(0, "recursive", &recursive,
1041                        N_("Recurse into nested submodules")),
1042                OPT_END()
1043        };
1044
1045        const char *const git_submodule_helper_usage[] = {
1046                N_("git submodule--helper sync [--quiet] [--recursive] [<path>]"),
1047                NULL
1048        };
1049
1050        argc = parse_options(argc, argv, prefix, module_sync_options,
1051                             git_submodule_helper_usage, 0);
1052
1053        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1054                return 1;
1055
1056        info.prefix = prefix;
1057        if (quiet)
1058                info.flags |= OPT_QUIET;
1059        if (recursive)
1060                info.flags |= OPT_RECURSIVE;
1061
1062        for_each_listed_submodule(&list, sync_submodule_cb, &info);
1063
1064        return 0;
1065}
1066
1067struct deinit_cb {
1068        const char *prefix;
1069        unsigned int flags;
1070};
1071#define DEINIT_CB_INIT { NULL, 0 }
1072
1073static void deinit_submodule(const char *path, const char *prefix,
1074                             unsigned int flags)
1075{
1076        const struct submodule *sub;
1077        char *displaypath = NULL;
1078        struct child_process cp_config = CHILD_PROCESS_INIT;
1079        struct strbuf sb_config = STRBUF_INIT;
1080        char *sub_git_dir = xstrfmt("%s/.git", path);
1081
1082        sub = submodule_from_path(the_repository, &null_oid, path);
1083
1084        if (!sub || !sub->name)
1085                goto cleanup;
1086
1087        displaypath = get_submodule_displaypath(path, prefix);
1088
1089        /* remove the submodule work tree (unless the user already did it) */
1090        if (is_directory(path)) {
1091                struct strbuf sb_rm = STRBUF_INIT;
1092                const char *format;
1093
1094                /*
1095                 * protect submodules containing a .git directory
1096                 * NEEDSWORK: instead of dying, automatically call
1097                 * absorbgitdirs and (possibly) warn.
1098                 */
1099                if (is_directory(sub_git_dir))
1100                        die(_("Submodule work tree '%s' contains a .git "
1101                              "directory (use 'rm -rf' if you really want "
1102                              "to remove it including all of its history)"),
1103                            displaypath);
1104
1105                if (!(flags & OPT_FORCE)) {
1106                        struct child_process cp_rm = CHILD_PROCESS_INIT;
1107                        cp_rm.git_cmd = 1;
1108                        argv_array_pushl(&cp_rm.args, "rm", "-qn",
1109                                         path, NULL);
1110
1111                        if (run_command(&cp_rm))
1112                                die(_("Submodule work tree '%s' contains local "
1113                                      "modifications; use '-f' to discard them"),
1114                                      displaypath);
1115                }
1116
1117                strbuf_addstr(&sb_rm, path);
1118
1119                if (!remove_dir_recursively(&sb_rm, 0))
1120                        format = _("Cleared directory '%s'\n");
1121                else
1122                        format = _("Could not remove submodule work tree '%s'\n");
1123
1124                if (!(flags & OPT_QUIET))
1125                        printf(format, displaypath);
1126
1127                strbuf_release(&sb_rm);
1128        }
1129
1130        if (mkdir(path, 0777))
1131                printf(_("could not create empty submodule directory %s"),
1132                      displaypath);
1133
1134        cp_config.git_cmd = 1;
1135        argv_array_pushl(&cp_config.args, "config", "--get-regexp", NULL);
1136        argv_array_pushf(&cp_config.args, "submodule.%s\\.", sub->name);
1137
1138        /* remove the .git/config entries (unless the user already did it) */
1139        if (!capture_command(&cp_config, &sb_config, 0) && sb_config.len) {
1140                char *sub_key = xstrfmt("submodule.%s", sub->name);
1141                /*
1142                 * remove the whole section so we have a clean state when
1143                 * the user later decides to init this submodule again
1144                 */
1145                git_config_rename_section_in_file(NULL, sub_key, NULL);
1146                if (!(flags & OPT_QUIET))
1147                        printf(_("Submodule '%s' (%s) unregistered for path '%s'\n"),
1148                                 sub->name, sub->url, displaypath);
1149                free(sub_key);
1150        }
1151
1152cleanup:
1153        free(displaypath);
1154        free(sub_git_dir);
1155        strbuf_release(&sb_config);
1156}
1157
1158static void deinit_submodule_cb(const struct cache_entry *list_item,
1159                                void *cb_data)
1160{
1161        struct deinit_cb *info = cb_data;
1162        deinit_submodule(list_item->name, info->prefix, info->flags);
1163}
1164
1165static int module_deinit(int argc, const char **argv, const char *prefix)
1166{
1167        struct deinit_cb info = DEINIT_CB_INIT;
1168        struct pathspec pathspec;
1169        struct module_list list = MODULE_LIST_INIT;
1170        int quiet = 0;
1171        int force = 0;
1172        int all = 0;
1173
1174        struct option module_deinit_options[] = {
1175                OPT__QUIET(&quiet, N_("Suppress submodule status output")),
1176                OPT__FORCE(&force, N_("Remove submodule working trees even if they contain local changes"), 0),
1177                OPT_BOOL(0, "all", &all, N_("Unregister all submodules")),
1178                OPT_END()
1179        };
1180
1181        const char *const git_submodule_helper_usage[] = {
1182                N_("git submodule deinit [--quiet] [-f | --force] [--all | [--] [<path>...]]"),
1183                NULL
1184        };
1185
1186        argc = parse_options(argc, argv, prefix, module_deinit_options,
1187                             git_submodule_helper_usage, 0);
1188
1189        if (all && argc) {
1190                error("pathspec and --all are incompatible");
1191                usage_with_options(git_submodule_helper_usage,
1192                                   module_deinit_options);
1193        }
1194
1195        if (!argc && !all)
1196                die(_("Use '--all' if you really want to deinitialize all submodules"));
1197
1198        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1199                return 1;
1200
1201        info.prefix = prefix;
1202        if (quiet)
1203                info.flags |= OPT_QUIET;
1204        if (force)
1205                info.flags |= OPT_FORCE;
1206
1207        for_each_listed_submodule(&list, deinit_submodule_cb, &info);
1208
1209        return 0;
1210}
1211
1212static int clone_submodule(const char *path, const char *gitdir, const char *url,
1213                           const char *depth, struct string_list *reference, int dissociate,
1214                           int quiet, int progress)
1215{
1216        struct child_process cp = CHILD_PROCESS_INIT;
1217
1218        argv_array_push(&cp.args, "clone");
1219        argv_array_push(&cp.args, "--no-checkout");
1220        if (quiet)
1221                argv_array_push(&cp.args, "--quiet");
1222        if (progress)
1223                argv_array_push(&cp.args, "--progress");
1224        if (depth && *depth)
1225                argv_array_pushl(&cp.args, "--depth", depth, NULL);
1226        if (reference->nr) {
1227                struct string_list_item *item;
1228                for_each_string_list_item(item, reference)
1229                        argv_array_pushl(&cp.args, "--reference",
1230                                         item->string, NULL);
1231        }
1232        if (dissociate)
1233                argv_array_push(&cp.args, "--dissociate");
1234        if (gitdir && *gitdir)
1235                argv_array_pushl(&cp.args, "--separate-git-dir", gitdir, NULL);
1236
1237        argv_array_push(&cp.args, url);
1238        argv_array_push(&cp.args, path);
1239
1240        cp.git_cmd = 1;
1241        prepare_submodule_repo_env(&cp.env_array);
1242        cp.no_stdin = 1;
1243
1244        return run_command(&cp);
1245}
1246
1247struct submodule_alternate_setup {
1248        const char *submodule_name;
1249        enum SUBMODULE_ALTERNATE_ERROR_MODE {
1250                SUBMODULE_ALTERNATE_ERROR_DIE,
1251                SUBMODULE_ALTERNATE_ERROR_INFO,
1252                SUBMODULE_ALTERNATE_ERROR_IGNORE
1253        } error_mode;
1254        struct string_list *reference;
1255};
1256#define SUBMODULE_ALTERNATE_SETUP_INIT { NULL, \
1257        SUBMODULE_ALTERNATE_ERROR_IGNORE, NULL }
1258
1259static int add_possible_reference_from_superproject(
1260                struct alternate_object_database *alt, void *sas_cb)
1261{
1262        struct submodule_alternate_setup *sas = sas_cb;
1263
1264        /*
1265         * If the alternate object store is another repository, try the
1266         * standard layout with .git/(modules/<name>)+/objects
1267         */
1268        if (ends_with(alt->path, "/objects")) {
1269                char *sm_alternate;
1270                struct strbuf sb = STRBUF_INIT;
1271                struct strbuf err = STRBUF_INIT;
1272                strbuf_add(&sb, alt->path, strlen(alt->path) - strlen("objects"));
1273
1274                /*
1275                 * We need to end the new path with '/' to mark it as a dir,
1276                 * otherwise a submodule name containing '/' will be broken
1277                 * as the last part of a missing submodule reference would
1278                 * be taken as a file name.
1279                 */
1280                strbuf_addf(&sb, "modules/%s/", sas->submodule_name);
1281
1282                sm_alternate = compute_alternate_path(sb.buf, &err);
1283                if (sm_alternate) {
1284                        string_list_append(sas->reference, xstrdup(sb.buf));
1285                        free(sm_alternate);
1286                } else {
1287                        switch (sas->error_mode) {
1288                        case SUBMODULE_ALTERNATE_ERROR_DIE:
1289                                die(_("submodule '%s' cannot add alternate: %s"),
1290                                    sas->submodule_name, err.buf);
1291                        case SUBMODULE_ALTERNATE_ERROR_INFO:
1292                                fprintf(stderr, _("submodule '%s' cannot add alternate: %s"),
1293                                        sas->submodule_name, err.buf);
1294                        case SUBMODULE_ALTERNATE_ERROR_IGNORE:
1295                                ; /* nothing */
1296                        }
1297                }
1298                strbuf_release(&sb);
1299        }
1300
1301        return 0;
1302}
1303
1304static void prepare_possible_alternates(const char *sm_name,
1305                struct string_list *reference)
1306{
1307        char *sm_alternate = NULL, *error_strategy = NULL;
1308        struct submodule_alternate_setup sas = SUBMODULE_ALTERNATE_SETUP_INIT;
1309
1310        git_config_get_string("submodule.alternateLocation", &sm_alternate);
1311        if (!sm_alternate)
1312                return;
1313
1314        git_config_get_string("submodule.alternateErrorStrategy", &error_strategy);
1315
1316        if (!error_strategy)
1317                error_strategy = xstrdup("die");
1318
1319        sas.submodule_name = sm_name;
1320        sas.reference = reference;
1321        if (!strcmp(error_strategy, "die"))
1322                sas.error_mode = SUBMODULE_ALTERNATE_ERROR_DIE;
1323        else if (!strcmp(error_strategy, "info"))
1324                sas.error_mode = SUBMODULE_ALTERNATE_ERROR_INFO;
1325        else if (!strcmp(error_strategy, "ignore"))
1326                sas.error_mode = SUBMODULE_ALTERNATE_ERROR_IGNORE;
1327        else
1328                die(_("Value '%s' for submodule.alternateErrorStrategy is not recognized"), error_strategy);
1329
1330        if (!strcmp(sm_alternate, "superproject"))
1331                foreach_alt_odb(add_possible_reference_from_superproject, &sas);
1332        else if (!strcmp(sm_alternate, "no"))
1333                ; /* do nothing */
1334        else
1335                die(_("Value '%s' for submodule.alternateLocation is not recognized"), sm_alternate);
1336
1337        free(sm_alternate);
1338        free(error_strategy);
1339}
1340
1341static int module_clone(int argc, const char **argv, const char *prefix)
1342{
1343        const char *name = NULL, *url = NULL, *depth = NULL;
1344        int quiet = 0;
1345        int progress = 0;
1346        char *p, *path = NULL, *sm_gitdir;
1347        struct strbuf sb = STRBUF_INIT;
1348        struct string_list reference = STRING_LIST_INIT_NODUP;
1349        int dissociate = 0;
1350        char *sm_alternate = NULL, *error_strategy = NULL;
1351
1352        struct option module_clone_options[] = {
1353                OPT_STRING(0, "prefix", &prefix,
1354                           N_("path"),
1355                           N_("alternative anchor for relative paths")),
1356                OPT_STRING(0, "path", &path,
1357                           N_("path"),
1358                           N_("where the new submodule will be cloned to")),
1359                OPT_STRING(0, "name", &name,
1360                           N_("string"),
1361                           N_("name of the new submodule")),
1362                OPT_STRING(0, "url", &url,
1363                           N_("string"),
1364                           N_("url where to clone the submodule from")),
1365                OPT_STRING_LIST(0, "reference", &reference,
1366                           N_("repo"),
1367                           N_("reference repository")),
1368                OPT_BOOL(0, "dissociate", &dissociate,
1369                           N_("use --reference only while cloning")),
1370                OPT_STRING(0, "depth", &depth,
1371                           N_("string"),
1372                           N_("depth for shallow clones")),
1373                OPT__QUIET(&quiet, "Suppress output for cloning a submodule"),
1374                OPT_BOOL(0, "progress", &progress,
1375                           N_("force cloning progress")),
1376                OPT_END()
1377        };
1378
1379        const char *const git_submodule_helper_usage[] = {
1380                N_("git submodule--helper clone [--prefix=<path>] [--quiet] "
1381                   "[--reference <repository>] [--name <name>] [--depth <depth>] "
1382                   "--url <url> --path <path>"),
1383                NULL
1384        };
1385
1386        argc = parse_options(argc, argv, prefix, module_clone_options,
1387                             git_submodule_helper_usage, 0);
1388
1389        if (argc || !url || !path || !*path)
1390                usage_with_options(git_submodule_helper_usage,
1391                                   module_clone_options);
1392
1393        strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
1394        sm_gitdir = absolute_pathdup(sb.buf);
1395        strbuf_reset(&sb);
1396
1397        if (!is_absolute_path(path)) {
1398                strbuf_addf(&sb, "%s/%s", get_git_work_tree(), path);
1399                path = strbuf_detach(&sb, NULL);
1400        } else
1401                path = xstrdup(path);
1402
1403        if (!file_exists(sm_gitdir)) {
1404                if (safe_create_leading_directories_const(sm_gitdir) < 0)
1405                        die(_("could not create directory '%s'"), sm_gitdir);
1406
1407                prepare_possible_alternates(name, &reference);
1408
1409                if (clone_submodule(path, sm_gitdir, url, depth, &reference, dissociate,
1410                                    quiet, progress))
1411                        die(_("clone of '%s' into submodule path '%s' failed"),
1412                            url, path);
1413        } else {
1414                if (safe_create_leading_directories_const(path) < 0)
1415                        die(_("could not create directory '%s'"), path);
1416                strbuf_addf(&sb, "%s/index", sm_gitdir);
1417                unlink_or_warn(sb.buf);
1418                strbuf_reset(&sb);
1419        }
1420
1421        connect_work_tree_and_git_dir(path, sm_gitdir, 0);
1422
1423        p = git_pathdup_submodule(path, "config");
1424        if (!p)
1425                die(_("could not get submodule directory for '%s'"), path);
1426
1427        /* setup alternateLocation and alternateErrorStrategy in the cloned submodule if needed */
1428        git_config_get_string("submodule.alternateLocation", &sm_alternate);
1429        if (sm_alternate)
1430                git_config_set_in_file(p, "submodule.alternateLocation",
1431                                           sm_alternate);
1432        git_config_get_string("submodule.alternateErrorStrategy", &error_strategy);
1433        if (error_strategy)
1434                git_config_set_in_file(p, "submodule.alternateErrorStrategy",
1435                                           error_strategy);
1436
1437        free(sm_alternate);
1438        free(error_strategy);
1439
1440        strbuf_release(&sb);
1441        free(sm_gitdir);
1442        free(path);
1443        free(p);
1444        return 0;
1445}
1446
1447struct submodule_update_clone {
1448        /* index into 'list', the list of submodules to look into for cloning */
1449        int current;
1450        struct module_list list;
1451        unsigned warn_if_uninitialized : 1;
1452
1453        /* update parameter passed via commandline */
1454        struct submodule_update_strategy update;
1455
1456        /* configuration parameters which are passed on to the children */
1457        int progress;
1458        int quiet;
1459        int recommend_shallow;
1460        struct string_list references;
1461        int dissociate;
1462        const char *depth;
1463        const char *recursive_prefix;
1464        const char *prefix;
1465
1466        /* Machine-readable status lines to be consumed by git-submodule.sh */
1467        struct string_list projectlines;
1468
1469        /* If we want to stop as fast as possible and return an error */
1470        unsigned quickstop : 1;
1471
1472        /* failed clones to be retried again */
1473        const struct cache_entry **failed_clones;
1474        int failed_clones_nr, failed_clones_alloc;
1475};
1476#define SUBMODULE_UPDATE_CLONE_INIT {0, MODULE_LIST_INIT, 0, \
1477        SUBMODULE_UPDATE_STRATEGY_INIT, 0, 0, -1, STRING_LIST_INIT_DUP, 0, \
1478        NULL, NULL, NULL, \
1479        STRING_LIST_INIT_DUP, 0, NULL, 0, 0}
1480
1481
1482static void next_submodule_warn_missing(struct submodule_update_clone *suc,
1483                struct strbuf *out, const char *displaypath)
1484{
1485        /*
1486         * Only mention uninitialized submodules when their
1487         * paths have been specified.
1488         */
1489        if (suc->warn_if_uninitialized) {
1490                strbuf_addf(out,
1491                        _("Submodule path '%s' not initialized"),
1492                        displaypath);
1493                strbuf_addch(out, '\n');
1494                strbuf_addstr(out,
1495                        _("Maybe you want to use 'update --init'?"));
1496                strbuf_addch(out, '\n');
1497        }
1498}
1499
1500/**
1501 * Determine whether 'ce' needs to be cloned. If so, prepare the 'child' to
1502 * run the clone. Returns 1 if 'ce' needs to be cloned, 0 otherwise.
1503 */
1504static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
1505                                           struct child_process *child,
1506                                           struct submodule_update_clone *suc,
1507                                           struct strbuf *out)
1508{
1509        const struct submodule *sub = NULL;
1510        const char *url = NULL;
1511        const char *update_string;
1512        enum submodule_update_type update_type;
1513        char *key;
1514        struct strbuf displaypath_sb = STRBUF_INIT;
1515        struct strbuf sb = STRBUF_INIT;
1516        const char *displaypath = NULL;
1517        int needs_cloning = 0;
1518
1519        if (ce_stage(ce)) {
1520                if (suc->recursive_prefix)
1521                        strbuf_addf(&sb, "%s/%s", suc->recursive_prefix, ce->name);
1522                else
1523                        strbuf_addstr(&sb, ce->name);
1524                strbuf_addf(out, _("Skipping unmerged submodule %s"), sb.buf);
1525                strbuf_addch(out, '\n');
1526                goto cleanup;
1527        }
1528
1529        sub = submodule_from_path(the_repository, &null_oid, ce->name);
1530
1531        if (suc->recursive_prefix)
1532                displaypath = relative_path(suc->recursive_prefix,
1533                                            ce->name, &displaypath_sb);
1534        else
1535                displaypath = ce->name;
1536
1537        if (!sub) {
1538                next_submodule_warn_missing(suc, out, displaypath);
1539                goto cleanup;
1540        }
1541
1542        key = xstrfmt("submodule.%s.update", sub->name);
1543        if (!repo_config_get_string_const(the_repository, key, &update_string)) {
1544                update_type = parse_submodule_update_type(update_string);
1545        } else {
1546                update_type = sub->update_strategy.type;
1547        }
1548        free(key);
1549
1550        if (suc->update.type == SM_UPDATE_NONE
1551            || (suc->update.type == SM_UPDATE_UNSPECIFIED
1552                && update_type == SM_UPDATE_NONE)) {
1553                strbuf_addf(out, _("Skipping submodule '%s'"), displaypath);
1554                strbuf_addch(out, '\n');
1555                goto cleanup;
1556        }
1557
1558        /* Check if the submodule has been initialized. */
1559        if (!is_submodule_active(the_repository, ce->name)) {
1560                next_submodule_warn_missing(suc, out, displaypath);
1561                goto cleanup;
1562        }
1563
1564        strbuf_reset(&sb);
1565        strbuf_addf(&sb, "submodule.%s.url", sub->name);
1566        if (repo_config_get_string_const(the_repository, sb.buf, &url))
1567                url = sub->url;
1568
1569        strbuf_reset(&sb);
1570        strbuf_addf(&sb, "%s/.git", ce->name);
1571        needs_cloning = !file_exists(sb.buf);
1572
1573        strbuf_reset(&sb);
1574        strbuf_addf(&sb, "%06o %s %d %d\t%s\n", ce->ce_mode,
1575                        oid_to_hex(&ce->oid), ce_stage(ce),
1576                        needs_cloning, ce->name);
1577        string_list_append(&suc->projectlines, sb.buf);
1578
1579        if (!needs_cloning)
1580                goto cleanup;
1581
1582        child->git_cmd = 1;
1583        child->no_stdin = 1;
1584        child->stdout_to_stderr = 1;
1585        child->err = -1;
1586        argv_array_push(&child->args, "submodule--helper");
1587        argv_array_push(&child->args, "clone");
1588        if (suc->progress)
1589                argv_array_push(&child->args, "--progress");
1590        if (suc->quiet)
1591                argv_array_push(&child->args, "--quiet");
1592        if (suc->prefix)
1593                argv_array_pushl(&child->args, "--prefix", suc->prefix, NULL);
1594        if (suc->recommend_shallow && sub->recommend_shallow == 1)
1595                argv_array_push(&child->args, "--depth=1");
1596        argv_array_pushl(&child->args, "--path", sub->path, NULL);
1597        argv_array_pushl(&child->args, "--name", sub->name, NULL);
1598        argv_array_pushl(&child->args, "--url", url, NULL);
1599        if (suc->references.nr) {
1600                struct string_list_item *item;
1601                for_each_string_list_item(item, &suc->references)
1602                        argv_array_pushl(&child->args, "--reference", item->string, NULL);
1603        }
1604        if (suc->dissociate)
1605                argv_array_push(&child->args, "--dissociate");
1606        if (suc->depth)
1607                argv_array_push(&child->args, suc->depth);
1608
1609cleanup:
1610        strbuf_reset(&displaypath_sb);
1611        strbuf_reset(&sb);
1612
1613        return needs_cloning;
1614}
1615
1616static int update_clone_get_next_task(struct child_process *child,
1617                                      struct strbuf *err,
1618                                      void *suc_cb,
1619                                      void **idx_task_cb)
1620{
1621        struct submodule_update_clone *suc = suc_cb;
1622        const struct cache_entry *ce;
1623        int index;
1624
1625        for (; suc->current < suc->list.nr; suc->current++) {
1626                ce = suc->list.entries[suc->current];
1627                if (prepare_to_clone_next_submodule(ce, child, suc, err)) {
1628                        int *p = xmalloc(sizeof(*p));
1629                        *p = suc->current;
1630                        *idx_task_cb = p;
1631                        suc->current++;
1632                        return 1;
1633                }
1634        }
1635
1636        /*
1637         * The loop above tried cloning each submodule once, now try the
1638         * stragglers again, which we can imagine as an extension of the
1639         * entry list.
1640         */
1641        index = suc->current - suc->list.nr;
1642        if (index < suc->failed_clones_nr) {
1643                int *p;
1644                ce = suc->failed_clones[index];
1645                if (!prepare_to_clone_next_submodule(ce, child, suc, err)) {
1646                        suc->current ++;
1647                        strbuf_addstr(err, "BUG: submodule considered for "
1648                                           "cloning, doesn't need cloning "
1649                                           "any more?\n");
1650                        return 0;
1651                }
1652                p = xmalloc(sizeof(*p));
1653                *p = suc->current;
1654                *idx_task_cb = p;
1655                suc->current ++;
1656                return 1;
1657        }
1658
1659        return 0;
1660}
1661
1662static int update_clone_start_failure(struct strbuf *err,
1663                                      void *suc_cb,
1664                                      void *idx_task_cb)
1665{
1666        struct submodule_update_clone *suc = suc_cb;
1667        suc->quickstop = 1;
1668        return 1;
1669}
1670
1671static int update_clone_task_finished(int result,
1672                                      struct strbuf *err,
1673                                      void *suc_cb,
1674                                      void *idx_task_cb)
1675{
1676        const struct cache_entry *ce;
1677        struct submodule_update_clone *suc = suc_cb;
1678
1679        int *idxP = idx_task_cb;
1680        int idx = *idxP;
1681        free(idxP);
1682
1683        if (!result)
1684                return 0;
1685
1686        if (idx < suc->list.nr) {
1687                ce  = suc->list.entries[idx];
1688                strbuf_addf(err, _("Failed to clone '%s'. Retry scheduled"),
1689                            ce->name);
1690                strbuf_addch(err, '\n');
1691                ALLOC_GROW(suc->failed_clones,
1692                           suc->failed_clones_nr + 1,
1693                           suc->failed_clones_alloc);
1694                suc->failed_clones[suc->failed_clones_nr++] = ce;
1695                return 0;
1696        } else {
1697                idx -= suc->list.nr;
1698                ce  = suc->failed_clones[idx];
1699                strbuf_addf(err, _("Failed to clone '%s' a second time, aborting"),
1700                            ce->name);
1701                strbuf_addch(err, '\n');
1702                suc->quickstop = 1;
1703                return 1;
1704        }
1705
1706        return 0;
1707}
1708
1709static int gitmodules_update_clone_config(const char *var, const char *value,
1710                                          void *cb)
1711{
1712        int *max_jobs = cb;
1713        if (!strcmp(var, "submodule.fetchjobs"))
1714                *max_jobs = parse_submodule_fetchjobs(var, value);
1715        return 0;
1716}
1717
1718static int update_clone(int argc, const char **argv, const char *prefix)
1719{
1720        const char *update = NULL;
1721        int max_jobs = 1;
1722        struct string_list_item *item;
1723        struct pathspec pathspec;
1724        struct submodule_update_clone suc = SUBMODULE_UPDATE_CLONE_INIT;
1725
1726        struct option module_update_clone_options[] = {
1727                OPT_STRING(0, "prefix", &prefix,
1728                           N_("path"),
1729                           N_("path into the working tree")),
1730                OPT_STRING(0, "recursive-prefix", &suc.recursive_prefix,
1731                           N_("path"),
1732                           N_("path into the working tree, across nested "
1733                              "submodule boundaries")),
1734                OPT_STRING(0, "update", &update,
1735                           N_("string"),
1736                           N_("rebase, merge, checkout or none")),
1737                OPT_STRING_LIST(0, "reference", &suc.references, N_("repo"),
1738                           N_("reference repository")),
1739                OPT_BOOL(0, "dissociate", &suc.dissociate,
1740                           N_("use --reference only while cloning")),
1741                OPT_STRING(0, "depth", &suc.depth, "<depth>",
1742                           N_("Create a shallow clone truncated to the "
1743                              "specified number of revisions")),
1744                OPT_INTEGER('j', "jobs", &max_jobs,
1745                            N_("parallel jobs")),
1746                OPT_BOOL(0, "recommend-shallow", &suc.recommend_shallow,
1747                            N_("whether the initial clone should follow the shallow recommendation")),
1748                OPT__QUIET(&suc.quiet, N_("don't print cloning progress")),
1749                OPT_BOOL(0, "progress", &suc.progress,
1750                            N_("force cloning progress")),
1751                OPT_END()
1752        };
1753
1754        const char *const git_submodule_helper_usage[] = {
1755                N_("git submodule--helper update_clone [--prefix=<path>] [<path>...]"),
1756                NULL
1757        };
1758        suc.prefix = prefix;
1759
1760        config_from_gitmodules(gitmodules_update_clone_config, &max_jobs);
1761        git_config(gitmodules_update_clone_config, &max_jobs);
1762
1763        argc = parse_options(argc, argv, prefix, module_update_clone_options,
1764                             git_submodule_helper_usage, 0);
1765
1766        if (update)
1767                if (parse_submodule_update_strategy(update, &suc.update) < 0)
1768                        die(_("bad value for update parameter"));
1769
1770        if (module_list_compute(argc, argv, prefix, &pathspec, &suc.list) < 0)
1771                return 1;
1772
1773        if (pathspec.nr)
1774                suc.warn_if_uninitialized = 1;
1775
1776        run_processes_parallel(max_jobs,
1777                               update_clone_get_next_task,
1778                               update_clone_start_failure,
1779                               update_clone_task_finished,
1780                               &suc);
1781
1782        /*
1783         * We saved the output and put it out all at once now.
1784         * That means:
1785         * - the listener does not have to interleave their (checkout)
1786         *   work with our fetching.  The writes involved in a
1787         *   checkout involve more straightforward sequential I/O.
1788         * - the listener can avoid doing any work if fetching failed.
1789         */
1790        if (suc.quickstop)
1791                return 1;
1792
1793        for_each_string_list_item(item, &suc.projectlines)
1794                fprintf(stdout, "%s", item->string);
1795
1796        return 0;
1797}
1798
1799static int resolve_relative_path(int argc, const char **argv, const char *prefix)
1800{
1801        struct strbuf sb = STRBUF_INIT;
1802        if (argc != 3)
1803                die("submodule--helper relative-path takes exactly 2 arguments, got %d", argc);
1804
1805        printf("%s", relative_path(argv[1], argv[2], &sb));
1806        strbuf_release(&sb);
1807        return 0;
1808}
1809
1810static const char *remote_submodule_branch(const char *path)
1811{
1812        const struct submodule *sub;
1813        const char *branch = NULL;
1814        char *key;
1815
1816        sub = submodule_from_path(the_repository, &null_oid, path);
1817        if (!sub)
1818                return NULL;
1819
1820        key = xstrfmt("submodule.%s.branch", sub->name);
1821        if (repo_config_get_string_const(the_repository, key, &branch))
1822                branch = sub->branch;
1823        free(key);
1824
1825        if (!branch)
1826                return "master";
1827
1828        if (!strcmp(branch, ".")) {
1829                const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
1830
1831                if (!refname)
1832                        die(_("No such ref: %s"), "HEAD");
1833
1834                /* detached HEAD */
1835                if (!strcmp(refname, "HEAD"))
1836                        die(_("Submodule (%s) branch configured to inherit "
1837                              "branch from superproject, but the superproject "
1838                              "is not on any branch"), sub->name);
1839
1840                if (!skip_prefix(refname, "refs/heads/", &refname))
1841                        die(_("Expecting a full ref name, got %s"), refname);
1842                return refname;
1843        }
1844
1845        return branch;
1846}
1847
1848static int resolve_remote_submodule_branch(int argc, const char **argv,
1849                const char *prefix)
1850{
1851        const char *ret;
1852        struct strbuf sb = STRBUF_INIT;
1853        if (argc != 2)
1854                die("submodule--helper remote-branch takes exactly one arguments, got %d", argc);
1855
1856        ret = remote_submodule_branch(argv[1]);
1857        if (!ret)
1858                die("submodule %s doesn't exist", argv[1]);
1859
1860        printf("%s", ret);
1861        strbuf_release(&sb);
1862        return 0;
1863}
1864
1865static int push_check(int argc, const char **argv, const char *prefix)
1866{
1867        struct remote *remote;
1868        const char *superproject_head;
1869        char *head;
1870        int detached_head = 0;
1871        struct object_id head_oid;
1872
1873        if (argc < 3)
1874                die("submodule--helper push-check requires at least 2 arguments");
1875
1876        /*
1877         * superproject's resolved head ref.
1878         * if HEAD then the superproject is in a detached head state, otherwise
1879         * it will be the resolved head ref.
1880         */
1881        superproject_head = argv[1];
1882        argv++;
1883        argc--;
1884        /* Get the submodule's head ref and determine if it is detached */
1885        head = resolve_refdup("HEAD", 0, &head_oid, NULL);
1886        if (!head)
1887                die(_("Failed to resolve HEAD as a valid ref."));
1888        if (!strcmp(head, "HEAD"))
1889                detached_head = 1;
1890
1891        /*
1892         * The remote must be configured.
1893         * This is to avoid pushing to the exact same URL as the parent.
1894         */
1895        remote = pushremote_get(argv[1]);
1896        if (!remote || remote->origin == REMOTE_UNCONFIGURED)
1897                die("remote '%s' not configured", argv[1]);
1898
1899        /* Check the refspec */
1900        if (argc > 2) {
1901                int i;
1902                struct ref *local_refs = get_local_heads();
1903                struct refspec refspec = REFSPEC_INIT_PUSH;
1904
1905                refspec_appendn(&refspec, argv + 2, argc - 2);
1906
1907                for (i = 0; i < refspec.nr; i++) {
1908                        const struct refspec_item *rs = &refspec.items[i];
1909
1910                        if (rs->pattern || rs->matching)
1911                                continue;
1912
1913                        /* LHS must match a single ref */
1914                        switch (count_refspec_match(rs->src, local_refs, NULL)) {
1915                        case 1:
1916                                break;
1917                        case 0:
1918                                /*
1919                                 * If LHS matches 'HEAD' then we need to ensure
1920                                 * that it matches the same named branch
1921                                 * checked out in the superproject.
1922                                 */
1923                                if (!strcmp(rs->src, "HEAD")) {
1924                                        if (!detached_head &&
1925                                            !strcmp(head, superproject_head))
1926                                                break;
1927                                        die("HEAD does not match the named branch in the superproject");
1928                                }
1929                                /* fallthrough */
1930                        default:
1931                                die("src refspec '%s' must name a ref",
1932                                    rs->src);
1933                        }
1934                }
1935                refspec_clear(&refspec);
1936        }
1937        free(head);
1938
1939        return 0;
1940}
1941
1942static int absorb_git_dirs(int argc, const char **argv, const char *prefix)
1943{
1944        int i;
1945        struct pathspec pathspec;
1946        struct module_list list = MODULE_LIST_INIT;
1947        unsigned flags = ABSORB_GITDIR_RECURSE_SUBMODULES;
1948
1949        struct option embed_gitdir_options[] = {
1950                OPT_STRING(0, "prefix", &prefix,
1951                           N_("path"),
1952                           N_("path into the working tree")),
1953                OPT_BIT(0, "--recursive", &flags, N_("recurse into submodules"),
1954                        ABSORB_GITDIR_RECURSE_SUBMODULES),
1955                OPT_END()
1956        };
1957
1958        const char *const git_submodule_helper_usage[] = {
1959                N_("git submodule--helper embed-git-dir [<path>...]"),
1960                NULL
1961        };
1962
1963        argc = parse_options(argc, argv, prefix, embed_gitdir_options,
1964                             git_submodule_helper_usage, 0);
1965
1966        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1967                return 1;
1968
1969        for (i = 0; i < list.nr; i++)
1970                absorb_git_dir_into_superproject(prefix,
1971                                list.entries[i]->name, flags);
1972
1973        return 0;
1974}
1975
1976static int is_active(int argc, const char **argv, const char *prefix)
1977{
1978        if (argc != 2)
1979                die("submodule--helper is-active takes exactly 1 argument");
1980
1981        return !is_submodule_active(the_repository, argv[1]);
1982}
1983
1984/*
1985 * Exit non-zero if any of the submodule names given on the command line is
1986 * invalid. If no names are given, filter stdin to print only valid names
1987 * (which is primarily intended for testing).
1988 */
1989static int check_name(int argc, const char **argv, const char *prefix)
1990{
1991        if (argc > 1) {
1992                while (*++argv) {
1993                        if (check_submodule_name(*argv) < 0)
1994                                return 1;
1995                }
1996        } else {
1997                struct strbuf buf = STRBUF_INIT;
1998                while (strbuf_getline(&buf, stdin) != EOF) {
1999                        if (!check_submodule_name(buf.buf))
2000                                printf("%s\n", buf.buf);
2001                }
2002                strbuf_release(&buf);
2003        }
2004        return 0;
2005}
2006
2007#define SUPPORT_SUPER_PREFIX (1<<0)
2008
2009struct cmd_struct {
2010        const char *cmd;
2011        int (*fn)(int, const char **, const char *);
2012        unsigned option;
2013};
2014
2015static struct cmd_struct commands[] = {
2016        {"list", module_list, 0},
2017        {"name", module_name, 0},
2018        {"clone", module_clone, 0},
2019        {"update-clone", update_clone, 0},
2020        {"relative-path", resolve_relative_path, 0},
2021        {"resolve-relative-url", resolve_relative_url, 0},
2022        {"resolve-relative-url-test", resolve_relative_url_test, 0},
2023        {"foreach", module_foreach, SUPPORT_SUPER_PREFIX},
2024        {"init", module_init, SUPPORT_SUPER_PREFIX},
2025        {"status", module_status, SUPPORT_SUPER_PREFIX},
2026        {"print-default-remote", print_default_remote, 0},
2027        {"sync", module_sync, SUPPORT_SUPER_PREFIX},
2028        {"deinit", module_deinit, 0},
2029        {"remote-branch", resolve_remote_submodule_branch, 0},
2030        {"push-check", push_check, 0},
2031        {"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
2032        {"is-active", is_active, 0},
2033        {"check-name", check_name, 0},
2034};
2035
2036int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
2037{
2038        int i;
2039        if (argc < 2 || !strcmp(argv[1], "-h"))
2040                usage("git submodule--helper <command>");
2041
2042        for (i = 0; i < ARRAY_SIZE(commands); i++) {
2043                if (!strcmp(argv[1], commands[i].cmd)) {
2044                        if (get_super_prefix() &&
2045                            !(commands[i].option & SUPPORT_SUPER_PREFIX))
2046                                die(_("%s doesn't support --super-prefix"),
2047                                    commands[i].cmd);
2048                        return commands[i].fn(argc - 1, argv + 1, prefix);
2049                }
2050        }
2051
2052        die(_("'%s' is not a valid submodule--helper "
2053              "subcommand"), argv[1]);
2054}