Andrew's git / gitweb.git / builtin/submodule--helper.c
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builtin / submodule--helper.con commit Sync with 2.16.5 (e43aab7)
   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 "connect.h"
  16#include "revision.h"
  17#include "diffcore.h"
  18#include "diff.h"
  19
  20#define OPT_QUIET (1 << 0)
  21#define OPT_CACHED (1 << 1)
  22#define OPT_RECURSIVE (1 << 2)
  23#define OPT_FORCE (1 << 3)
  24
  25typedef void (*each_submodule_fn)(const struct cache_entry *list_item,
  26                                  void *cb_data);
  27
  28static char *get_default_remote(void)
  29{
  30        char *dest = NULL, *ret;
  31        struct strbuf sb = STRBUF_INIT;
  32        const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
  33
  34        if (!refname)
  35                die(_("No such ref: %s"), "HEAD");
  36
  37        /* detached HEAD */
  38        if (!strcmp(refname, "HEAD"))
  39                return xstrdup("origin");
  40
  41        if (!skip_prefix(refname, "refs/heads/", &refname))
  42                die(_("Expecting a full ref name, got %s"), refname);
  43
  44        strbuf_addf(&sb, "branch.%s.remote", refname);
  45        if (git_config_get_string(sb.buf, &dest))
  46                ret = xstrdup("origin");
  47        else
  48                ret = dest;
  49
  50        strbuf_release(&sb);
  51        return ret;
  52}
  53
  54static int print_default_remote(int argc, const char **argv, const char *prefix)
  55{
  56        const char *remote;
  57
  58        if (argc != 1)
  59                die(_("submodule--helper print-default-remote takes no arguments"));
  60
  61        remote = get_default_remote();
  62        if (remote)
  63                printf("%s\n", remote);
  64
  65        return 0;
  66}
  67
  68static int starts_with_dot_slash(const char *str)
  69{
  70        return str[0] == '.' && is_dir_sep(str[1]);
  71}
  72
  73static int starts_with_dot_dot_slash(const char *str)
  74{
  75        return str[0] == '.' && str[1] == '.' && is_dir_sep(str[2]);
  76}
  77
  78/*
  79 * Returns 1 if it was the last chop before ':'.
  80 */
  81static int chop_last_dir(char **remoteurl, int is_relative)
  82{
  83        char *rfind = find_last_dir_sep(*remoteurl);
  84        if (rfind) {
  85                *rfind = '\0';
  86                return 0;
  87        }
  88
  89        rfind = strrchr(*remoteurl, ':');
  90        if (rfind) {
  91                *rfind = '\0';
  92                return 1;
  93        }
  94
  95        if (is_relative || !strcmp(".", *remoteurl))
  96                die(_("cannot strip one component off url '%s'"),
  97                        *remoteurl);
  98
  99        free(*remoteurl);
 100        *remoteurl = xstrdup(".");
 101        return 0;
 102}
 103
 104/*
 105 * The `url` argument is the URL that navigates to the submodule origin
 106 * repo. When relative, this URL is relative to the superproject origin
 107 * URL repo. The `up_path` argument, if specified, is the relative
 108 * path that navigates from the submodule working tree to the superproject
 109 * working tree. Returns the origin URL of the submodule.
 110 *
 111 * Return either an absolute URL or filesystem path (if the superproject
 112 * origin URL is an absolute URL or filesystem path, respectively) or a
 113 * relative file system path (if the superproject origin URL is a relative
 114 * file system path).
 115 *
 116 * When the output is a relative file system path, the path is either
 117 * relative to the submodule working tree, if up_path is specified, or to
 118 * the superproject working tree otherwise.
 119 *
 120 * NEEDSWORK: This works incorrectly on the domain and protocol part.
 121 * remote_url      url              outcome          expectation
 122 * http://a.com/b  ../c             http://a.com/c   as is
 123 * http://a.com/b/ ../c             http://a.com/c   same as previous line, but
 124 *                                                   ignore trailing slash in url
 125 * http://a.com/b  ../../c          http://c         error out
 126 * http://a.com/b  ../../../c       http:/c          error out
 127 * http://a.com/b  ../../../../c    http:c           error out
 128 * http://a.com/b  ../../../../../c    .:c           error out
 129 * NEEDSWORK: Given how chop_last_dir() works, this function is broken
 130 * when a local part has a colon in its path component, too.
 131 */
 132static char *relative_url(const char *remote_url,
 133                                const char *url,
 134                                const char *up_path)
 135{
 136        int is_relative = 0;
 137        int colonsep = 0;
 138        char *out;
 139        char *remoteurl = xstrdup(remote_url);
 140        struct strbuf sb = STRBUF_INIT;
 141        size_t len = strlen(remoteurl);
 142
 143        if (is_dir_sep(remoteurl[len-1]))
 144                remoteurl[len-1] = '\0';
 145
 146        if (!url_is_local_not_ssh(remoteurl) || is_absolute_path(remoteurl))
 147                is_relative = 0;
 148        else {
 149                is_relative = 1;
 150                /*
 151                 * Prepend a './' to ensure all relative
 152                 * remoteurls start with './' or '../'
 153                 */
 154                if (!starts_with_dot_slash(remoteurl) &&
 155                    !starts_with_dot_dot_slash(remoteurl)) {
 156                        strbuf_reset(&sb);
 157                        strbuf_addf(&sb, "./%s", remoteurl);
 158                        free(remoteurl);
 159                        remoteurl = strbuf_detach(&sb, NULL);
 160                }
 161        }
 162        /*
 163         * When the url starts with '../', remove that and the
 164         * last directory in remoteurl.
 165         */
 166        while (url) {
 167                if (starts_with_dot_dot_slash(url)) {
 168                        url += 3;
 169                        colonsep |= chop_last_dir(&remoteurl, is_relative);
 170                } else if (starts_with_dot_slash(url))
 171                        url += 2;
 172                else
 173                        break;
 174        }
 175        strbuf_reset(&sb);
 176        strbuf_addf(&sb, "%s%s%s", remoteurl, colonsep ? ":" : "/", url);
 177        if (ends_with(url, "/"))
 178                strbuf_setlen(&sb, sb.len - 1);
 179        free(remoteurl);
 180
 181        if (starts_with_dot_slash(sb.buf))
 182                out = xstrdup(sb.buf + 2);
 183        else
 184                out = xstrdup(sb.buf);
 185        strbuf_reset(&sb);
 186
 187        if (!up_path || !is_relative)
 188                return out;
 189
 190        strbuf_addf(&sb, "%s%s", up_path, out);
 191        free(out);
 192        return strbuf_detach(&sb, NULL);
 193}
 194
 195static int resolve_relative_url(int argc, const char **argv, const char *prefix)
 196{
 197        char *remoteurl = NULL;
 198        char *remote = get_default_remote();
 199        const char *up_path = NULL;
 200        char *res;
 201        const char *url;
 202        struct strbuf sb = STRBUF_INIT;
 203
 204        if (argc != 2 && argc != 3)
 205                die("resolve-relative-url only accepts one or two arguments");
 206
 207        url = argv[1];
 208        strbuf_addf(&sb, "remote.%s.url", remote);
 209        free(remote);
 210
 211        if (git_config_get_string(sb.buf, &remoteurl))
 212                /* the repository is its own authoritative upstream */
 213                remoteurl = xgetcwd();
 214
 215        if (argc == 3)
 216                up_path = argv[2];
 217
 218        res = relative_url(remoteurl, url, up_path);
 219        puts(res);
 220        free(res);
 221        free(remoteurl);
 222        return 0;
 223}
 224
 225static int resolve_relative_url_test(int argc, const char **argv, const char *prefix)
 226{
 227        char *remoteurl, *res;
 228        const char *up_path, *url;
 229
 230        if (argc != 4)
 231                die("resolve-relative-url-test only accepts three arguments: <up_path> <remoteurl> <url>");
 232
 233        up_path = argv[1];
 234        remoteurl = xstrdup(argv[2]);
 235        url = argv[3];
 236
 237        if (!strcmp(up_path, "(null)"))
 238                up_path = NULL;
 239
 240        res = relative_url(remoteurl, url, up_path);
 241        puts(res);
 242        free(res);
 243        free(remoteurl);
 244        return 0;
 245}
 246
 247/* the result should be freed by the caller. */
 248static char *get_submodule_displaypath(const char *path, const char *prefix)
 249{
 250        const char *super_prefix = get_super_prefix();
 251
 252        if (prefix && super_prefix) {
 253                BUG("cannot have prefix '%s' and superprefix '%s'",
 254                    prefix, super_prefix);
 255        } else if (prefix) {
 256                struct strbuf sb = STRBUF_INIT;
 257                char *displaypath = xstrdup(relative_path(path, prefix, &sb));
 258                strbuf_release(&sb);
 259                return displaypath;
 260        } else if (super_prefix) {
 261                return xstrfmt("%s%s", super_prefix, path);
 262        } else {
 263                return xstrdup(path);
 264        }
 265}
 266
 267static char *compute_rev_name(const char *sub_path, const char* object_id)
 268{
 269        struct strbuf sb = STRBUF_INIT;
 270        const char ***d;
 271
 272        static const char *describe_bare[] = { NULL };
 273
 274        static const char *describe_tags[] = { "--tags", NULL };
 275
 276        static const char *describe_contains[] = { "--contains", NULL };
 277
 278        static const char *describe_all_always[] = { "--all", "--always", NULL };
 279
 280        static const char **describe_argv[] = { describe_bare, describe_tags,
 281                                                describe_contains,
 282                                                describe_all_always, NULL };
 283
 284        for (d = describe_argv; *d; d++) {
 285                struct child_process cp = CHILD_PROCESS_INIT;
 286                prepare_submodule_repo_env(&cp.env_array);
 287                cp.dir = sub_path;
 288                cp.git_cmd = 1;
 289                cp.no_stderr = 1;
 290
 291                argv_array_push(&cp.args, "describe");
 292                argv_array_pushv(&cp.args, *d);
 293                argv_array_push(&cp.args, object_id);
 294
 295                if (!capture_command(&cp, &sb, 0)) {
 296                        strbuf_strip_suffix(&sb, "\n");
 297                        return strbuf_detach(&sb, NULL);
 298                }
 299        }
 300
 301        strbuf_release(&sb);
 302        return NULL;
 303}
 304
 305struct module_list {
 306        const struct cache_entry **entries;
 307        int alloc, nr;
 308};
 309#define MODULE_LIST_INIT { NULL, 0, 0 }
 310
 311static int module_list_compute(int argc, const char **argv,
 312                               const char *prefix,
 313                               struct pathspec *pathspec,
 314                               struct module_list *list)
 315{
 316        int i, result = 0;
 317        char *ps_matched = NULL;
 318        parse_pathspec(pathspec, 0,
 319                       PATHSPEC_PREFER_FULL,
 320                       prefix, argv);
 321
 322        if (pathspec->nr)
 323                ps_matched = xcalloc(pathspec->nr, 1);
 324
 325        if (read_cache() < 0)
 326                die(_("index file corrupt"));
 327
 328        for (i = 0; i < active_nr; i++) {
 329                const struct cache_entry *ce = active_cache[i];
 330
 331                if (!match_pathspec(pathspec, ce->name, ce_namelen(ce),
 332                                    0, ps_matched, 1) ||
 333                    !S_ISGITLINK(ce->ce_mode))
 334                        continue;
 335
 336                ALLOC_GROW(list->entries, list->nr + 1, list->alloc);
 337                list->entries[list->nr++] = ce;
 338                while (i + 1 < active_nr &&
 339                       !strcmp(ce->name, active_cache[i + 1]->name))
 340                        /*
 341                         * Skip entries with the same name in different stages
 342                         * to make sure an entry is returned only once.
 343                         */
 344                        i++;
 345        }
 346
 347        if (ps_matched && report_path_error(ps_matched, pathspec, prefix))
 348                result = -1;
 349
 350        free(ps_matched);
 351
 352        return result;
 353}
 354
 355static void module_list_active(struct module_list *list)
 356{
 357        int i;
 358        struct module_list active_modules = MODULE_LIST_INIT;
 359
 360        for (i = 0; i < list->nr; i++) {
 361                const struct cache_entry *ce = list->entries[i];
 362
 363                if (!is_submodule_active(the_repository, ce->name))
 364                        continue;
 365
 366                ALLOC_GROW(active_modules.entries,
 367                           active_modules.nr + 1,
 368                           active_modules.alloc);
 369                active_modules.entries[active_modules.nr++] = ce;
 370        }
 371
 372        free(list->entries);
 373        *list = active_modules;
 374}
 375
 376static char *get_up_path(const char *path)
 377{
 378        int i;
 379        struct strbuf sb = STRBUF_INIT;
 380
 381        for (i = count_slashes(path); i; i--)
 382                strbuf_addstr(&sb, "../");
 383
 384        /*
 385         * Check if 'path' ends with slash or not
 386         * for having the same output for dir/sub_dir
 387         * and dir/sub_dir/
 388         */
 389        if (!is_dir_sep(path[strlen(path) - 1]))
 390                strbuf_addstr(&sb, "../");
 391
 392        return strbuf_detach(&sb, NULL);
 393}
 394
 395static int module_list(int argc, const char **argv, const char *prefix)
 396{
 397        int i;
 398        struct pathspec pathspec;
 399        struct module_list list = MODULE_LIST_INIT;
 400
 401        struct option module_list_options[] = {
 402                OPT_STRING(0, "prefix", &prefix,
 403                           N_("path"),
 404                           N_("alternative anchor for relative paths")),
 405                OPT_END()
 406        };
 407
 408        const char *const git_submodule_helper_usage[] = {
 409                N_("git submodule--helper list [--prefix=<path>] [<path>...]"),
 410                NULL
 411        };
 412
 413        argc = parse_options(argc, argv, prefix, module_list_options,
 414                             git_submodule_helper_usage, 0);
 415
 416        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
 417                return 1;
 418
 419        for (i = 0; i < list.nr; i++) {
 420                const struct cache_entry *ce = list.entries[i];
 421
 422                if (ce_stage(ce))
 423                        printf("%06o %s U\t", ce->ce_mode, sha1_to_hex(null_sha1));
 424                else
 425                        printf("%06o %s %d\t", ce->ce_mode,
 426                               oid_to_hex(&ce->oid), ce_stage(ce));
 427
 428                fprintf(stdout, "%s\n", ce->name);
 429        }
 430        return 0;
 431}
 432
 433static void for_each_listed_submodule(const struct module_list *list,
 434                                      each_submodule_fn fn, void *cb_data)
 435{
 436        int i;
 437        for (i = 0; i < list->nr; i++)
 438                fn(list->entries[i], cb_data);
 439}
 440
 441struct init_cb {
 442        const char *prefix;
 443        unsigned int flags;
 444};
 445
 446#define INIT_CB_INIT { NULL, 0 }
 447
 448static void init_submodule(const char *path, const char *prefix,
 449                           unsigned int flags)
 450{
 451        const struct submodule *sub;
 452        struct strbuf sb = STRBUF_INIT;
 453        char *upd = NULL, *url = NULL, *displaypath;
 454
 455        displaypath = get_submodule_displaypath(path, prefix);
 456
 457        sub = submodule_from_path(&null_oid, path);
 458
 459        if (!sub)
 460                die(_("No url found for submodule path '%s' in .gitmodules"),
 461                        displaypath);
 462
 463        /*
 464         * NEEDSWORK: In a multi-working-tree world, this needs to be
 465         * set in the per-worktree config.
 466         *
 467         * Set active flag for the submodule being initialized
 468         */
 469        if (!is_submodule_active(the_repository, path)) {
 470                strbuf_addf(&sb, "submodule.%s.active", sub->name);
 471                git_config_set_gently(sb.buf, "true");
 472                strbuf_reset(&sb);
 473        }
 474
 475        /*
 476         * Copy url setting when it is not set yet.
 477         * To look up the url in .git/config, we must not fall back to
 478         * .gitmodules, so look it up directly.
 479         */
 480        strbuf_addf(&sb, "submodule.%s.url", sub->name);
 481        if (git_config_get_string(sb.buf, &url)) {
 482                if (!sub->url)
 483                        die(_("No url found for submodule path '%s' in .gitmodules"),
 484                                displaypath);
 485
 486                url = xstrdup(sub->url);
 487
 488                /* Possibly a url relative to parent */
 489                if (starts_with_dot_dot_slash(url) ||
 490                    starts_with_dot_slash(url)) {
 491                        char *remoteurl, *relurl;
 492                        char *remote = get_default_remote();
 493                        struct strbuf remotesb = STRBUF_INIT;
 494                        strbuf_addf(&remotesb, "remote.%s.url", remote);
 495                        free(remote);
 496
 497                        if (git_config_get_string(remotesb.buf, &remoteurl)) {
 498                                warning(_("could not lookup configuration '%s'. Assuming this repository is its own authoritative upstream."), remotesb.buf);
 499                                remoteurl = xgetcwd();
 500                        }
 501                        relurl = relative_url(remoteurl, url, NULL);
 502                        strbuf_release(&remotesb);
 503                        free(remoteurl);
 504                        free(url);
 505                        url = relurl;
 506                }
 507
 508                if (git_config_set_gently(sb.buf, url))
 509                        die(_("Failed to register url for submodule path '%s'"),
 510                            displaypath);
 511                if (!(flags & OPT_QUIET))
 512                        fprintf(stderr,
 513                                _("Submodule '%s' (%s) registered for path '%s'\n"),
 514                                sub->name, url, displaypath);
 515        }
 516        strbuf_reset(&sb);
 517
 518        /* Copy "update" setting when it is not set yet */
 519        strbuf_addf(&sb, "submodule.%s.update", sub->name);
 520        if (git_config_get_string(sb.buf, &upd) &&
 521            sub->update_strategy.type != SM_UPDATE_UNSPECIFIED) {
 522                if (sub->update_strategy.type == SM_UPDATE_COMMAND) {
 523                        fprintf(stderr, _("warning: command update mode suggested for submodule '%s'\n"),
 524                                sub->name);
 525                        upd = xstrdup("none");
 526                } else
 527                        upd = xstrdup(submodule_strategy_to_string(&sub->update_strategy));
 528
 529                if (git_config_set_gently(sb.buf, upd))
 530                        die(_("Failed to register update mode for submodule path '%s'"), displaypath);
 531        }
 532        strbuf_release(&sb);
 533        free(displaypath);
 534        free(url);
 535        free(upd);
 536}
 537
 538static void init_submodule_cb(const struct cache_entry *list_item, void *cb_data)
 539{
 540        struct init_cb *info = cb_data;
 541        init_submodule(list_item->name, info->prefix, info->flags);
 542}
 543
 544static int module_init(int argc, const char **argv, const char *prefix)
 545{
 546        struct init_cb info = INIT_CB_INIT;
 547        struct pathspec pathspec;
 548        struct module_list list = MODULE_LIST_INIT;
 549        int quiet = 0;
 550
 551        struct option module_init_options[] = {
 552                OPT__QUIET(&quiet, N_("Suppress output for initializing a submodule")),
 553                OPT_END()
 554        };
 555
 556        const char *const git_submodule_helper_usage[] = {
 557                N_("git submodule--helper init [<path>]"),
 558                NULL
 559        };
 560
 561        argc = parse_options(argc, argv, prefix, module_init_options,
 562                             git_submodule_helper_usage, 0);
 563
 564        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
 565                return 1;
 566
 567        /*
 568         * If there are no path args and submodule.active is set then,
 569         * by default, only initialize 'active' modules.
 570         */
 571        if (!argc && git_config_get_value_multi("submodule.active"))
 572                module_list_active(&list);
 573
 574        info.prefix = prefix;
 575        if (quiet)
 576                info.flags |= OPT_QUIET;
 577
 578        for_each_listed_submodule(&list, init_submodule_cb, &info);
 579
 580        return 0;
 581}
 582
 583struct status_cb {
 584        const char *prefix;
 585        unsigned int flags;
 586};
 587
 588#define STATUS_CB_INIT { NULL, 0 }
 589
 590static void print_status(unsigned int flags, char state, const char *path,
 591                         const struct object_id *oid, const char *displaypath)
 592{
 593        if (flags & OPT_QUIET)
 594                return;
 595
 596        printf("%c%s %s", state, oid_to_hex(oid), displaypath);
 597
 598        if (state == ' ' || state == '+')
 599                printf(" (%s)", compute_rev_name(path, oid_to_hex(oid)));
 600
 601        printf("\n");
 602}
 603
 604static int handle_submodule_head_ref(const char *refname,
 605                                     const struct object_id *oid, int flags,
 606                                     void *cb_data)
 607{
 608        struct object_id *output = cb_data;
 609        if (oid)
 610                oidcpy(output, oid);
 611
 612        return 0;
 613}
 614
 615static void status_submodule(const char *path, const struct object_id *ce_oid,
 616                             unsigned int ce_flags, const char *prefix,
 617                             unsigned int flags)
 618{
 619        char *displaypath;
 620        struct argv_array diff_files_args = ARGV_ARRAY_INIT;
 621        struct rev_info rev;
 622        int diff_files_result;
 623
 624        if (!submodule_from_path(&null_oid, path))
 625                die(_("no submodule mapping found in .gitmodules for path '%s'"),
 626                      path);
 627
 628        displaypath = get_submodule_displaypath(path, prefix);
 629
 630        if ((CE_STAGEMASK & ce_flags) >> CE_STAGESHIFT) {
 631                print_status(flags, 'U', path, &null_oid, displaypath);
 632                goto cleanup;
 633        }
 634
 635        if (!is_submodule_active(the_repository, path)) {
 636                print_status(flags, '-', path, ce_oid, displaypath);
 637                goto cleanup;
 638        }
 639
 640        argv_array_pushl(&diff_files_args, "diff-files",
 641                         "--ignore-submodules=dirty", "--quiet", "--",
 642                         path, NULL);
 643
 644        git_config(git_diff_basic_config, NULL);
 645        init_revisions(&rev, prefix);
 646        rev.abbrev = 0;
 647        diff_files_args.argc = setup_revisions(diff_files_args.argc,
 648                                               diff_files_args.argv,
 649                                               &rev, NULL);
 650        diff_files_result = run_diff_files(&rev, 0);
 651
 652        if (!diff_result_code(&rev.diffopt, diff_files_result)) {
 653                print_status(flags, ' ', path, ce_oid,
 654                             displaypath);
 655        } else if (!(flags & OPT_CACHED)) {
 656                struct object_id oid;
 657
 658                if (refs_head_ref(get_submodule_ref_store(path),
 659                                  handle_submodule_head_ref, &oid))
 660                        die(_("could not resolve HEAD ref inside the "
 661                              "submodule '%s'"), path);
 662
 663                print_status(flags, '+', path, &oid, displaypath);
 664        } else {
 665                print_status(flags, '+', path, ce_oid, displaypath);
 666        }
 667
 668        if (flags & OPT_RECURSIVE) {
 669                struct child_process cpr = CHILD_PROCESS_INIT;
 670
 671                cpr.git_cmd = 1;
 672                cpr.dir = path;
 673                prepare_submodule_repo_env(&cpr.env_array);
 674
 675                argv_array_push(&cpr.args, "--super-prefix");
 676                argv_array_pushf(&cpr.args, "%s/", displaypath);
 677                argv_array_pushl(&cpr.args, "submodule--helper", "status",
 678                                 "--recursive", NULL);
 679
 680                if (flags & OPT_CACHED)
 681                        argv_array_push(&cpr.args, "--cached");
 682
 683                if (flags & OPT_QUIET)
 684                        argv_array_push(&cpr.args, "--quiet");
 685
 686                if (run_command(&cpr))
 687                        die(_("failed to recurse into submodule '%s'"), path);
 688        }
 689
 690cleanup:
 691        argv_array_clear(&diff_files_args);
 692        free(displaypath);
 693}
 694
 695static void status_submodule_cb(const struct cache_entry *list_item,
 696                                void *cb_data)
 697{
 698        struct status_cb *info = cb_data;
 699        status_submodule(list_item->name, &list_item->oid, list_item->ce_flags,
 700                         info->prefix, info->flags);
 701}
 702
 703static int module_status(int argc, const char **argv, const char *prefix)
 704{
 705        struct status_cb info = STATUS_CB_INIT;
 706        struct pathspec pathspec;
 707        struct module_list list = MODULE_LIST_INIT;
 708        int quiet = 0;
 709
 710        struct option module_status_options[] = {
 711                OPT__QUIET(&quiet, N_("Suppress submodule status output")),
 712                OPT_BIT(0, "cached", &info.flags, N_("Use commit stored in the index instead of the one stored in the submodule HEAD"), OPT_CACHED),
 713                OPT_BIT(0, "recursive", &info.flags, N_("recurse into nested submodules"), OPT_RECURSIVE),
 714                OPT_END()
 715        };
 716
 717        const char *const git_submodule_helper_usage[] = {
 718                N_("git submodule status [--quiet] [--cached] [--recursive] [<path>...]"),
 719                NULL
 720        };
 721
 722        argc = parse_options(argc, argv, prefix, module_status_options,
 723                             git_submodule_helper_usage, 0);
 724
 725        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
 726                return 1;
 727
 728        info.prefix = prefix;
 729        if (quiet)
 730                info.flags |= OPT_QUIET;
 731
 732        for_each_listed_submodule(&list, status_submodule_cb, &info);
 733
 734        return 0;
 735}
 736
 737static int module_name(int argc, const char **argv, const char *prefix)
 738{
 739        const struct submodule *sub;
 740
 741        if (argc != 2)
 742                usage(_("git submodule--helper name <path>"));
 743
 744        sub = submodule_from_path(&null_oid, argv[1]);
 745
 746        if (!sub)
 747                die(_("no submodule mapping found in .gitmodules for path '%s'"),
 748                    argv[1]);
 749
 750        printf("%s\n", sub->name);
 751
 752        return 0;
 753}
 754
 755struct sync_cb {
 756        const char *prefix;
 757        unsigned int flags;
 758};
 759
 760#define SYNC_CB_INIT { NULL, 0 }
 761
 762static void sync_submodule(const char *path, const char *prefix,
 763                           unsigned int flags)
 764{
 765        const struct submodule *sub;
 766        char *remote_key = NULL;
 767        char *sub_origin_url, *super_config_url, *displaypath;
 768        struct strbuf sb = STRBUF_INIT;
 769        struct child_process cp = CHILD_PROCESS_INIT;
 770        char *sub_config_path = NULL;
 771
 772        if (!is_submodule_active(the_repository, path))
 773                return;
 774
 775        sub = submodule_from_path(&null_oid, path);
 776
 777        if (sub && sub->url) {
 778                if (starts_with_dot_dot_slash(sub->url) ||
 779                    starts_with_dot_slash(sub->url)) {
 780                        char *remote_url, *up_path;
 781                        char *remote = get_default_remote();
 782                        strbuf_addf(&sb, "remote.%s.url", remote);
 783
 784                        if (git_config_get_string(sb.buf, &remote_url))
 785                                remote_url = xgetcwd();
 786
 787                        up_path = get_up_path(path);
 788                        sub_origin_url = relative_url(remote_url, sub->url, up_path);
 789                        super_config_url = relative_url(remote_url, sub->url, NULL);
 790
 791                        free(remote);
 792                        free(up_path);
 793                        free(remote_url);
 794                } else {
 795                        sub_origin_url = xstrdup(sub->url);
 796                        super_config_url = xstrdup(sub->url);
 797                }
 798        } else {
 799                sub_origin_url = xstrdup("");
 800                super_config_url = xstrdup("");
 801        }
 802
 803        displaypath = get_submodule_displaypath(path, prefix);
 804
 805        if (!(flags & OPT_QUIET))
 806                printf(_("Synchronizing submodule url for '%s'\n"),
 807                         displaypath);
 808
 809        strbuf_reset(&sb);
 810        strbuf_addf(&sb, "submodule.%s.url", sub->name);
 811        if (git_config_set_gently(sb.buf, super_config_url))
 812                die(_("failed to register url for submodule path '%s'"),
 813                      displaypath);
 814
 815        if (!is_submodule_populated_gently(path, NULL))
 816                goto cleanup;
 817
 818        prepare_submodule_repo_env(&cp.env_array);
 819        cp.git_cmd = 1;
 820        cp.dir = path;
 821        argv_array_pushl(&cp.args, "submodule--helper",
 822                         "print-default-remote", NULL);
 823
 824        strbuf_reset(&sb);
 825        if (capture_command(&cp, &sb, 0))
 826                die(_("failed to get the default remote for submodule '%s'"),
 827                      path);
 828
 829        strbuf_strip_suffix(&sb, "\n");
 830        remote_key = xstrfmt("remote.%s.url", sb.buf);
 831
 832        strbuf_reset(&sb);
 833        submodule_to_gitdir(&sb, path);
 834        strbuf_addstr(&sb, "/config");
 835
 836        if (git_config_set_in_file_gently(sb.buf, remote_key, sub_origin_url))
 837                die(_("failed to update remote for submodule '%s'"),
 838                      path);
 839
 840        if (flags & OPT_RECURSIVE) {
 841                struct child_process cpr = CHILD_PROCESS_INIT;
 842
 843                cpr.git_cmd = 1;
 844                cpr.dir = path;
 845                prepare_submodule_repo_env(&cpr.env_array);
 846
 847                argv_array_push(&cpr.args, "--super-prefix");
 848                argv_array_pushf(&cpr.args, "%s/", displaypath);
 849                argv_array_pushl(&cpr.args, "submodule--helper", "sync",
 850                                 "--recursive", NULL);
 851
 852                if (flags & OPT_QUIET)
 853                        argv_array_push(&cpr.args, "--quiet");
 854
 855                if (run_command(&cpr))
 856                        die(_("failed to recurse into submodule '%s'"),
 857                              path);
 858        }
 859
 860cleanup:
 861        free(super_config_url);
 862        free(sub_origin_url);
 863        strbuf_release(&sb);
 864        free(remote_key);
 865        free(displaypath);
 866        free(sub_config_path);
 867}
 868
 869static void sync_submodule_cb(const struct cache_entry *list_item, void *cb_data)
 870{
 871        struct sync_cb *info = cb_data;
 872        sync_submodule(list_item->name, info->prefix, info->flags);
 873
 874}
 875
 876static int module_sync(int argc, const char **argv, const char *prefix)
 877{
 878        struct sync_cb info = SYNC_CB_INIT;
 879        struct pathspec pathspec;
 880        struct module_list list = MODULE_LIST_INIT;
 881        int quiet = 0;
 882        int recursive = 0;
 883
 884        struct option module_sync_options[] = {
 885                OPT__QUIET(&quiet, N_("Suppress output of synchronizing submodule url")),
 886                OPT_BOOL(0, "recursive", &recursive,
 887                        N_("Recurse into nested submodules")),
 888                OPT_END()
 889        };
 890
 891        const char *const git_submodule_helper_usage[] = {
 892                N_("git submodule--helper sync [--quiet] [--recursive] [<path>]"),
 893                NULL
 894        };
 895
 896        argc = parse_options(argc, argv, prefix, module_sync_options,
 897                             git_submodule_helper_usage, 0);
 898
 899        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
 900                return 1;
 901
 902        info.prefix = prefix;
 903        if (quiet)
 904                info.flags |= OPT_QUIET;
 905        if (recursive)
 906                info.flags |= OPT_RECURSIVE;
 907
 908        for_each_listed_submodule(&list, sync_submodule_cb, &info);
 909
 910        return 0;
 911}
 912
 913struct deinit_cb {
 914        const char *prefix;
 915        unsigned int flags;
 916};
 917#define DEINIT_CB_INIT { NULL, 0 }
 918
 919static void deinit_submodule(const char *path, const char *prefix,
 920                             unsigned int flags)
 921{
 922        const struct submodule *sub;
 923        char *displaypath = NULL;
 924        struct child_process cp_config = CHILD_PROCESS_INIT;
 925        struct strbuf sb_config = STRBUF_INIT;
 926        char *sub_git_dir = xstrfmt("%s/.git", path);
 927
 928        sub = submodule_from_path(&null_oid, path);
 929
 930        if (!sub || !sub->name)
 931                goto cleanup;
 932
 933        displaypath = get_submodule_displaypath(path, prefix);
 934
 935        /* remove the submodule work tree (unless the user already did it) */
 936        if (is_directory(path)) {
 937                struct strbuf sb_rm = STRBUF_INIT;
 938                const char *format;
 939
 940                /*
 941                 * protect submodules containing a .git directory
 942                 * NEEDSWORK: instead of dying, automatically call
 943                 * absorbgitdirs and (possibly) warn.
 944                 */
 945                if (is_directory(sub_git_dir))
 946                        die(_("Submodule work tree '%s' contains a .git "
 947                              "directory (use 'rm -rf' if you really want "
 948                              "to remove it including all of its history)"),
 949                            displaypath);
 950
 951                if (!(flags & OPT_FORCE)) {
 952                        struct child_process cp_rm = CHILD_PROCESS_INIT;
 953                        cp_rm.git_cmd = 1;
 954                        argv_array_pushl(&cp_rm.args, "rm", "-qn",
 955                                         path, NULL);
 956
 957                        if (run_command(&cp_rm))
 958                                die(_("Submodule work tree '%s' contains local "
 959                                      "modifications; use '-f' to discard them"),
 960                                      displaypath);
 961                }
 962
 963                strbuf_addstr(&sb_rm, path);
 964
 965                if (!remove_dir_recursively(&sb_rm, 0))
 966                        format = _("Cleared directory '%s'\n");
 967                else
 968                        format = _("Could not remove submodule work tree '%s'\n");
 969
 970                if (!(flags & OPT_QUIET))
 971                        printf(format, displaypath);
 972
 973                strbuf_release(&sb_rm);
 974        }
 975
 976        if (mkdir(path, 0777))
 977                printf(_("could not create empty submodule directory %s"),
 978                      displaypath);
 979
 980        cp_config.git_cmd = 1;
 981        argv_array_pushl(&cp_config.args, "config", "--get-regexp", NULL);
 982        argv_array_pushf(&cp_config.args, "submodule.%s\\.", sub->name);
 983
 984        /* remove the .git/config entries (unless the user already did it) */
 985        if (!capture_command(&cp_config, &sb_config, 0) && sb_config.len) {
 986                char *sub_key = xstrfmt("submodule.%s", sub->name);
 987                /*
 988                 * remove the whole section so we have a clean state when
 989                 * the user later decides to init this submodule again
 990                 */
 991                git_config_rename_section_in_file(NULL, sub_key, NULL);
 992                if (!(flags & OPT_QUIET))
 993                        printf(_("Submodule '%s' (%s) unregistered for path '%s'\n"),
 994                                 sub->name, sub->url, displaypath);
 995                free(sub_key);
 996        }
 997
 998cleanup:
 999        free(displaypath);
1000        free(sub_git_dir);
1001        strbuf_release(&sb_config);
1002}
1003
1004static void deinit_submodule_cb(const struct cache_entry *list_item,
1005                                void *cb_data)
1006{
1007        struct deinit_cb *info = cb_data;
1008        deinit_submodule(list_item->name, info->prefix, info->flags);
1009}
1010
1011static int module_deinit(int argc, const char **argv, const char *prefix)
1012{
1013        struct deinit_cb info = DEINIT_CB_INIT;
1014        struct pathspec pathspec;
1015        struct module_list list = MODULE_LIST_INIT;
1016        int quiet = 0;
1017        int force = 0;
1018        int all = 0;
1019
1020        struct option module_deinit_options[] = {
1021                OPT__QUIET(&quiet, N_("Suppress submodule status output")),
1022                OPT__FORCE(&force, N_("Remove submodule working trees even if they contain local changes"), 0),
1023                OPT_BOOL(0, "all", &all, N_("Unregister all submodules")),
1024                OPT_END()
1025        };
1026
1027        const char *const git_submodule_helper_usage[] = {
1028                N_("git submodule deinit [--quiet] [-f | --force] [--all | [--] [<path>...]]"),
1029                NULL
1030        };
1031
1032        argc = parse_options(argc, argv, prefix, module_deinit_options,
1033                             git_submodule_helper_usage, 0);
1034
1035        if (all && argc) {
1036                error("pathspec and --all are incompatible");
1037                usage_with_options(git_submodule_helper_usage,
1038                                   module_deinit_options);
1039        }
1040
1041        if (!argc && !all)
1042                die(_("Use '--all' if you really want to deinitialize all submodules"));
1043
1044        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1045                return 1;
1046
1047        info.prefix = prefix;
1048        if (quiet)
1049                info.flags |= OPT_QUIET;
1050        if (force)
1051                info.flags |= OPT_FORCE;
1052
1053        for_each_listed_submodule(&list, deinit_submodule_cb, &info);
1054
1055        return 0;
1056}
1057
1058static int clone_submodule(const char *path, const char *gitdir, const char *url,
1059                           const char *depth, struct string_list *reference,
1060                           int quiet, int progress)
1061{
1062        struct child_process cp = CHILD_PROCESS_INIT;
1063
1064        argv_array_push(&cp.args, "clone");
1065        argv_array_push(&cp.args, "--no-checkout");
1066        if (quiet)
1067                argv_array_push(&cp.args, "--quiet");
1068        if (progress)
1069                argv_array_push(&cp.args, "--progress");
1070        if (depth && *depth)
1071                argv_array_pushl(&cp.args, "--depth", depth, NULL);
1072        if (reference->nr) {
1073                struct string_list_item *item;
1074                for_each_string_list_item(item, reference)
1075                        argv_array_pushl(&cp.args, "--reference",
1076                                         item->string, NULL);
1077        }
1078        if (gitdir && *gitdir)
1079                argv_array_pushl(&cp.args, "--separate-git-dir", gitdir, NULL);
1080
1081        argv_array_push(&cp.args, "--");
1082        argv_array_push(&cp.args, url);
1083        argv_array_push(&cp.args, path);
1084
1085        cp.git_cmd = 1;
1086        prepare_submodule_repo_env(&cp.env_array);
1087        cp.no_stdin = 1;
1088
1089        return run_command(&cp);
1090}
1091
1092struct submodule_alternate_setup {
1093        const char *submodule_name;
1094        enum SUBMODULE_ALTERNATE_ERROR_MODE {
1095                SUBMODULE_ALTERNATE_ERROR_DIE,
1096                SUBMODULE_ALTERNATE_ERROR_INFO,
1097                SUBMODULE_ALTERNATE_ERROR_IGNORE
1098        } error_mode;
1099        struct string_list *reference;
1100};
1101#define SUBMODULE_ALTERNATE_SETUP_INIT { NULL, \
1102        SUBMODULE_ALTERNATE_ERROR_IGNORE, NULL }
1103
1104static int add_possible_reference_from_superproject(
1105                struct alternate_object_database *alt, void *sas_cb)
1106{
1107        struct submodule_alternate_setup *sas = sas_cb;
1108
1109        /*
1110         * If the alternate object store is another repository, try the
1111         * standard layout with .git/(modules/<name>)+/objects
1112         */
1113        if (ends_with(alt->path, "/objects")) {
1114                char *sm_alternate;
1115                struct strbuf sb = STRBUF_INIT;
1116                struct strbuf err = STRBUF_INIT;
1117                strbuf_add(&sb, alt->path, strlen(alt->path) - strlen("objects"));
1118
1119                /*
1120                 * We need to end the new path with '/' to mark it as a dir,
1121                 * otherwise a submodule name containing '/' will be broken
1122                 * as the last part of a missing submodule reference would
1123                 * be taken as a file name.
1124                 */
1125                strbuf_addf(&sb, "modules/%s/", sas->submodule_name);
1126
1127                sm_alternate = compute_alternate_path(sb.buf, &err);
1128                if (sm_alternate) {
1129                        string_list_append(sas->reference, xstrdup(sb.buf));
1130                        free(sm_alternate);
1131                } else {
1132                        switch (sas->error_mode) {
1133                        case SUBMODULE_ALTERNATE_ERROR_DIE:
1134                                die(_("submodule '%s' cannot add alternate: %s"),
1135                                    sas->submodule_name, err.buf);
1136                        case SUBMODULE_ALTERNATE_ERROR_INFO:
1137                                fprintf(stderr, _("submodule '%s' cannot add alternate: %s"),
1138                                        sas->submodule_name, err.buf);
1139                        case SUBMODULE_ALTERNATE_ERROR_IGNORE:
1140                                ; /* nothing */
1141                        }
1142                }
1143                strbuf_release(&sb);
1144        }
1145
1146        return 0;
1147}
1148
1149static void prepare_possible_alternates(const char *sm_name,
1150                struct string_list *reference)
1151{
1152        char *sm_alternate = NULL, *error_strategy = NULL;
1153        struct submodule_alternate_setup sas = SUBMODULE_ALTERNATE_SETUP_INIT;
1154
1155        git_config_get_string("submodule.alternateLocation", &sm_alternate);
1156        if (!sm_alternate)
1157                return;
1158
1159        git_config_get_string("submodule.alternateErrorStrategy", &error_strategy);
1160
1161        if (!error_strategy)
1162                error_strategy = xstrdup("die");
1163
1164        sas.submodule_name = sm_name;
1165        sas.reference = reference;
1166        if (!strcmp(error_strategy, "die"))
1167                sas.error_mode = SUBMODULE_ALTERNATE_ERROR_DIE;
1168        else if (!strcmp(error_strategy, "info"))
1169                sas.error_mode = SUBMODULE_ALTERNATE_ERROR_INFO;
1170        else if (!strcmp(error_strategy, "ignore"))
1171                sas.error_mode = SUBMODULE_ALTERNATE_ERROR_IGNORE;
1172        else
1173                die(_("Value '%s' for submodule.alternateErrorStrategy is not recognized"), error_strategy);
1174
1175        if (!strcmp(sm_alternate, "superproject"))
1176                foreach_alt_odb(add_possible_reference_from_superproject, &sas);
1177        else if (!strcmp(sm_alternate, "no"))
1178                ; /* do nothing */
1179        else
1180                die(_("Value '%s' for submodule.alternateLocation is not recognized"), sm_alternate);
1181
1182        free(sm_alternate);
1183        free(error_strategy);
1184}
1185
1186static int module_clone(int argc, const char **argv, const char *prefix)
1187{
1188        const char *name = NULL, *url = NULL, *depth = NULL;
1189        int quiet = 0;
1190        int progress = 0;
1191        char *p, *path = NULL, *sm_gitdir;
1192        struct strbuf sb = STRBUF_INIT;
1193        struct string_list reference = STRING_LIST_INIT_NODUP;
1194        char *sm_alternate = NULL, *error_strategy = NULL;
1195
1196        struct option module_clone_options[] = {
1197                OPT_STRING(0, "prefix", &prefix,
1198                           N_("path"),
1199                           N_("alternative anchor for relative paths")),
1200                OPT_STRING(0, "path", &path,
1201                           N_("path"),
1202                           N_("where the new submodule will be cloned to")),
1203                OPT_STRING(0, "name", &name,
1204                           N_("string"),
1205                           N_("name of the new submodule")),
1206                OPT_STRING(0, "url", &url,
1207                           N_("string"),
1208                           N_("url where to clone the submodule from")),
1209                OPT_STRING_LIST(0, "reference", &reference,
1210                           N_("repo"),
1211                           N_("reference repository")),
1212                OPT_STRING(0, "depth", &depth,
1213                           N_("string"),
1214                           N_("depth for shallow clones")),
1215                OPT__QUIET(&quiet, "Suppress output for cloning a submodule"),
1216                OPT_BOOL(0, "progress", &progress,
1217                           N_("force cloning progress")),
1218                OPT_END()
1219        };
1220
1221        const char *const git_submodule_helper_usage[] = {
1222                N_("git submodule--helper clone [--prefix=<path>] [--quiet] "
1223                   "[--reference <repository>] [--name <name>] [--depth <depth>] "
1224                   "--url <url> --path <path>"),
1225                NULL
1226        };
1227
1228        argc = parse_options(argc, argv, prefix, module_clone_options,
1229                             git_submodule_helper_usage, 0);
1230
1231        if (argc || !url || !path || !*path)
1232                usage_with_options(git_submodule_helper_usage,
1233                                   module_clone_options);
1234
1235        strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
1236        sm_gitdir = absolute_pathdup(sb.buf);
1237        strbuf_reset(&sb);
1238
1239        if (!is_absolute_path(path)) {
1240                strbuf_addf(&sb, "%s/%s", get_git_work_tree(), path);
1241                path = strbuf_detach(&sb, NULL);
1242        } else
1243                path = xstrdup(path);
1244
1245        if (!file_exists(sm_gitdir)) {
1246                if (safe_create_leading_directories_const(sm_gitdir) < 0)
1247                        die(_("could not create directory '%s'"), sm_gitdir);
1248
1249                prepare_possible_alternates(name, &reference);
1250
1251                if (clone_submodule(path, sm_gitdir, url, depth, &reference,
1252                                    quiet, progress))
1253                        die(_("clone of '%s' into submodule path '%s' failed"),
1254                            url, path);
1255        } else {
1256                if (safe_create_leading_directories_const(path) < 0)
1257                        die(_("could not create directory '%s'"), path);
1258                strbuf_addf(&sb, "%s/index", sm_gitdir);
1259                unlink_or_warn(sb.buf);
1260                strbuf_reset(&sb);
1261        }
1262
1263        /* Connect module worktree and git dir */
1264        connect_work_tree_and_git_dir(path, sm_gitdir);
1265
1266        p = git_pathdup_submodule(path, "config");
1267        if (!p)
1268                die(_("could not get submodule directory for '%s'"), path);
1269
1270        /* setup alternateLocation and alternateErrorStrategy in the cloned submodule if needed */
1271        git_config_get_string("submodule.alternateLocation", &sm_alternate);
1272        if (sm_alternate)
1273                git_config_set_in_file(p, "submodule.alternateLocation",
1274                                           sm_alternate);
1275        git_config_get_string("submodule.alternateErrorStrategy", &error_strategy);
1276        if (error_strategy)
1277                git_config_set_in_file(p, "submodule.alternateErrorStrategy",
1278                                           error_strategy);
1279
1280        free(sm_alternate);
1281        free(error_strategy);
1282
1283        strbuf_release(&sb);
1284        free(sm_gitdir);
1285        free(path);
1286        free(p);
1287        return 0;
1288}
1289
1290struct submodule_update_clone {
1291        /* index into 'list', the list of submodules to look into for cloning */
1292        int current;
1293        struct module_list list;
1294        unsigned warn_if_uninitialized : 1;
1295
1296        /* update parameter passed via commandline */
1297        struct submodule_update_strategy update;
1298
1299        /* configuration parameters which are passed on to the children */
1300        int progress;
1301        int quiet;
1302        int recommend_shallow;
1303        struct string_list references;
1304        const char *depth;
1305        const char *recursive_prefix;
1306        const char *prefix;
1307
1308        /* Machine-readable status lines to be consumed by git-submodule.sh */
1309        struct string_list projectlines;
1310
1311        /* If we want to stop as fast as possible and return an error */
1312        unsigned quickstop : 1;
1313
1314        /* failed clones to be retried again */
1315        const struct cache_entry **failed_clones;
1316        int failed_clones_nr, failed_clones_alloc;
1317};
1318#define SUBMODULE_UPDATE_CLONE_INIT {0, MODULE_LIST_INIT, 0, \
1319        SUBMODULE_UPDATE_STRATEGY_INIT, 0, 0, -1, STRING_LIST_INIT_DUP, \
1320        NULL, NULL, NULL, \
1321        STRING_LIST_INIT_DUP, 0, NULL, 0, 0}
1322
1323
1324static void next_submodule_warn_missing(struct submodule_update_clone *suc,
1325                struct strbuf *out, const char *displaypath)
1326{
1327        /*
1328         * Only mention uninitialized submodules when their
1329         * paths have been specified.
1330         */
1331        if (suc->warn_if_uninitialized) {
1332                strbuf_addf(out,
1333                        _("Submodule path '%s' not initialized"),
1334                        displaypath);
1335                strbuf_addch(out, '\n');
1336                strbuf_addstr(out,
1337                        _("Maybe you want to use 'update --init'?"));
1338                strbuf_addch(out, '\n');
1339        }
1340}
1341
1342/**
1343 * Determine whether 'ce' needs to be cloned. If so, prepare the 'child' to
1344 * run the clone. Returns 1 if 'ce' needs to be cloned, 0 otherwise.
1345 */
1346static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
1347                                           struct child_process *child,
1348                                           struct submodule_update_clone *suc,
1349                                           struct strbuf *out)
1350{
1351        const struct submodule *sub = NULL;
1352        const char *url = NULL;
1353        const char *update_string;
1354        enum submodule_update_type update_type;
1355        char *key;
1356        struct strbuf displaypath_sb = STRBUF_INIT;
1357        struct strbuf sb = STRBUF_INIT;
1358        const char *displaypath = NULL;
1359        int needs_cloning = 0;
1360
1361        if (ce_stage(ce)) {
1362                if (suc->recursive_prefix)
1363                        strbuf_addf(&sb, "%s/%s", suc->recursive_prefix, ce->name);
1364                else
1365                        strbuf_addstr(&sb, ce->name);
1366                strbuf_addf(out, _("Skipping unmerged submodule %s"), sb.buf);
1367                strbuf_addch(out, '\n');
1368                goto cleanup;
1369        }
1370
1371        sub = submodule_from_path(&null_oid, ce->name);
1372
1373        if (suc->recursive_prefix)
1374                displaypath = relative_path(suc->recursive_prefix,
1375                                            ce->name, &displaypath_sb);
1376        else
1377                displaypath = ce->name;
1378
1379        if (!sub) {
1380                next_submodule_warn_missing(suc, out, displaypath);
1381                goto cleanup;
1382        }
1383
1384        key = xstrfmt("submodule.%s.update", sub->name);
1385        if (!repo_config_get_string_const(the_repository, key, &update_string)) {
1386                update_type = parse_submodule_update_type(update_string);
1387        } else {
1388                update_type = sub->update_strategy.type;
1389        }
1390        free(key);
1391
1392        if (suc->update.type == SM_UPDATE_NONE
1393            || (suc->update.type == SM_UPDATE_UNSPECIFIED
1394                && update_type == SM_UPDATE_NONE)) {
1395                strbuf_addf(out, _("Skipping submodule '%s'"), displaypath);
1396                strbuf_addch(out, '\n');
1397                goto cleanup;
1398        }
1399
1400        /* Check if the submodule has been initialized. */
1401        if (!is_submodule_active(the_repository, ce->name)) {
1402                next_submodule_warn_missing(suc, out, displaypath);
1403                goto cleanup;
1404        }
1405
1406        strbuf_reset(&sb);
1407        strbuf_addf(&sb, "submodule.%s.url", sub->name);
1408        if (repo_config_get_string_const(the_repository, sb.buf, &url))
1409                url = sub->url;
1410
1411        strbuf_reset(&sb);
1412        strbuf_addf(&sb, "%s/.git", ce->name);
1413        needs_cloning = !file_exists(sb.buf);
1414
1415        strbuf_reset(&sb);
1416        strbuf_addf(&sb, "%06o %s %d %d\t%s\n", ce->ce_mode,
1417                        oid_to_hex(&ce->oid), ce_stage(ce),
1418                        needs_cloning, ce->name);
1419        string_list_append(&suc->projectlines, sb.buf);
1420
1421        if (!needs_cloning)
1422                goto cleanup;
1423
1424        child->git_cmd = 1;
1425        child->no_stdin = 1;
1426        child->stdout_to_stderr = 1;
1427        child->err = -1;
1428        argv_array_push(&child->args, "submodule--helper");
1429        argv_array_push(&child->args, "clone");
1430        if (suc->progress)
1431                argv_array_push(&child->args, "--progress");
1432        if (suc->quiet)
1433                argv_array_push(&child->args, "--quiet");
1434        if (suc->prefix)
1435                argv_array_pushl(&child->args, "--prefix", suc->prefix, NULL);
1436        if (suc->recommend_shallow && sub->recommend_shallow == 1)
1437                argv_array_push(&child->args, "--depth=1");
1438        argv_array_pushl(&child->args, "--path", sub->path, NULL);
1439        argv_array_pushl(&child->args, "--name", sub->name, NULL);
1440        argv_array_pushl(&child->args, "--url", url, NULL);
1441        if (suc->references.nr) {
1442                struct string_list_item *item;
1443                for_each_string_list_item(item, &suc->references)
1444                        argv_array_pushl(&child->args, "--reference", item->string, NULL);
1445        }
1446        if (suc->depth)
1447                argv_array_push(&child->args, suc->depth);
1448
1449cleanup:
1450        strbuf_reset(&displaypath_sb);
1451        strbuf_reset(&sb);
1452
1453        return needs_cloning;
1454}
1455
1456static int update_clone_get_next_task(struct child_process *child,
1457                                      struct strbuf *err,
1458                                      void *suc_cb,
1459                                      void **idx_task_cb)
1460{
1461        struct submodule_update_clone *suc = suc_cb;
1462        const struct cache_entry *ce;
1463        int index;
1464
1465        for (; suc->current < suc->list.nr; suc->current++) {
1466                ce = suc->list.entries[suc->current];
1467                if (prepare_to_clone_next_submodule(ce, child, suc, err)) {
1468                        int *p = xmalloc(sizeof(*p));
1469                        *p = suc->current;
1470                        *idx_task_cb = p;
1471                        suc->current++;
1472                        return 1;
1473                }
1474        }
1475
1476        /*
1477         * The loop above tried cloning each submodule once, now try the
1478         * stragglers again, which we can imagine as an extension of the
1479         * entry list.
1480         */
1481        index = suc->current - suc->list.nr;
1482        if (index < suc->failed_clones_nr) {
1483                int *p;
1484                ce = suc->failed_clones[index];
1485                if (!prepare_to_clone_next_submodule(ce, child, suc, err)) {
1486                        suc->current ++;
1487                        strbuf_addstr(err, "BUG: submodule considered for "
1488                                           "cloning, doesn't need cloning "
1489                                           "any more?\n");
1490                        return 0;
1491                }
1492                p = xmalloc(sizeof(*p));
1493                *p = suc->current;
1494                *idx_task_cb = p;
1495                suc->current ++;
1496                return 1;
1497        }
1498
1499        return 0;
1500}
1501
1502static int update_clone_start_failure(struct strbuf *err,
1503                                      void *suc_cb,
1504                                      void *idx_task_cb)
1505{
1506        struct submodule_update_clone *suc = suc_cb;
1507        suc->quickstop = 1;
1508        return 1;
1509}
1510
1511static int update_clone_task_finished(int result,
1512                                      struct strbuf *err,
1513                                      void *suc_cb,
1514                                      void *idx_task_cb)
1515{
1516        const struct cache_entry *ce;
1517        struct submodule_update_clone *suc = suc_cb;
1518
1519        int *idxP = idx_task_cb;
1520        int idx = *idxP;
1521        free(idxP);
1522
1523        if (!result)
1524                return 0;
1525
1526        if (idx < suc->list.nr) {
1527                ce  = suc->list.entries[idx];
1528                strbuf_addf(err, _("Failed to clone '%s'. Retry scheduled"),
1529                            ce->name);
1530                strbuf_addch(err, '\n');
1531                ALLOC_GROW(suc->failed_clones,
1532                           suc->failed_clones_nr + 1,
1533                           suc->failed_clones_alloc);
1534                suc->failed_clones[suc->failed_clones_nr++] = ce;
1535                return 0;
1536        } else {
1537                idx -= suc->list.nr;
1538                ce  = suc->failed_clones[idx];
1539                strbuf_addf(err, _("Failed to clone '%s' a second time, aborting"),
1540                            ce->name);
1541                strbuf_addch(err, '\n');
1542                suc->quickstop = 1;
1543                return 1;
1544        }
1545
1546        return 0;
1547}
1548
1549static int gitmodules_update_clone_config(const char *var, const char *value,
1550                                          void *cb)
1551{
1552        int *max_jobs = cb;
1553        if (!strcmp(var, "submodule.fetchjobs"))
1554                *max_jobs = parse_submodule_fetchjobs(var, value);
1555        return 0;
1556}
1557
1558static int update_clone(int argc, const char **argv, const char *prefix)
1559{
1560        const char *update = NULL;
1561        int max_jobs = 1;
1562        struct string_list_item *item;
1563        struct pathspec pathspec;
1564        struct submodule_update_clone suc = SUBMODULE_UPDATE_CLONE_INIT;
1565
1566        struct option module_update_clone_options[] = {
1567                OPT_STRING(0, "prefix", &prefix,
1568                           N_("path"),
1569                           N_("path into the working tree")),
1570                OPT_STRING(0, "recursive-prefix", &suc.recursive_prefix,
1571                           N_("path"),
1572                           N_("path into the working tree, across nested "
1573                              "submodule boundaries")),
1574                OPT_STRING(0, "update", &update,
1575                           N_("string"),
1576                           N_("rebase, merge, checkout or none")),
1577                OPT_STRING_LIST(0, "reference", &suc.references, N_("repo"),
1578                           N_("reference repository")),
1579                OPT_STRING(0, "depth", &suc.depth, "<depth>",
1580                           N_("Create a shallow clone truncated to the "
1581                              "specified number of revisions")),
1582                OPT_INTEGER('j', "jobs", &max_jobs,
1583                            N_("parallel jobs")),
1584                OPT_BOOL(0, "recommend-shallow", &suc.recommend_shallow,
1585                            N_("whether the initial clone should follow the shallow recommendation")),
1586                OPT__QUIET(&suc.quiet, N_("don't print cloning progress")),
1587                OPT_BOOL(0, "progress", &suc.progress,
1588                            N_("force cloning progress")),
1589                OPT_END()
1590        };
1591
1592        const char *const git_submodule_helper_usage[] = {
1593                N_("git submodule--helper update_clone [--prefix=<path>] [<path>...]"),
1594                NULL
1595        };
1596        suc.prefix = prefix;
1597
1598        config_from_gitmodules(gitmodules_update_clone_config, &max_jobs);
1599        git_config(gitmodules_update_clone_config, &max_jobs);
1600
1601        argc = parse_options(argc, argv, prefix, module_update_clone_options,
1602                             git_submodule_helper_usage, 0);
1603
1604        if (update)
1605                if (parse_submodule_update_strategy(update, &suc.update) < 0)
1606                        die(_("bad value for update parameter"));
1607
1608        if (module_list_compute(argc, argv, prefix, &pathspec, &suc.list) < 0)
1609                return 1;
1610
1611        if (pathspec.nr)
1612                suc.warn_if_uninitialized = 1;
1613
1614        run_processes_parallel(max_jobs,
1615                               update_clone_get_next_task,
1616                               update_clone_start_failure,
1617                               update_clone_task_finished,
1618                               &suc);
1619
1620        /*
1621         * We saved the output and put it out all at once now.
1622         * That means:
1623         * - the listener does not have to interleave their (checkout)
1624         *   work with our fetching.  The writes involved in a
1625         *   checkout involve more straightforward sequential I/O.
1626         * - the listener can avoid doing any work if fetching failed.
1627         */
1628        if (suc.quickstop)
1629                return 1;
1630
1631        for_each_string_list_item(item, &suc.projectlines)
1632                fprintf(stdout, "%s", item->string);
1633
1634        return 0;
1635}
1636
1637static int resolve_relative_path(int argc, const char **argv, const char *prefix)
1638{
1639        struct strbuf sb = STRBUF_INIT;
1640        if (argc != 3)
1641                die("submodule--helper relative-path takes exactly 2 arguments, got %d", argc);
1642
1643        printf("%s", relative_path(argv[1], argv[2], &sb));
1644        strbuf_release(&sb);
1645        return 0;
1646}
1647
1648static const char *remote_submodule_branch(const char *path)
1649{
1650        const struct submodule *sub;
1651        const char *branch = NULL;
1652        char *key;
1653
1654        sub = submodule_from_path(&null_oid, path);
1655        if (!sub)
1656                return NULL;
1657
1658        key = xstrfmt("submodule.%s.branch", sub->name);
1659        if (repo_config_get_string_const(the_repository, key, &branch))
1660                branch = sub->branch;
1661        free(key);
1662
1663        if (!branch)
1664                return "master";
1665
1666        if (!strcmp(branch, ".")) {
1667                const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
1668
1669                if (!refname)
1670                        die(_("No such ref: %s"), "HEAD");
1671
1672                /* detached HEAD */
1673                if (!strcmp(refname, "HEAD"))
1674                        die(_("Submodule (%s) branch configured to inherit "
1675                              "branch from superproject, but the superproject "
1676                              "is not on any branch"), sub->name);
1677
1678                if (!skip_prefix(refname, "refs/heads/", &refname))
1679                        die(_("Expecting a full ref name, got %s"), refname);
1680                return refname;
1681        }
1682
1683        return branch;
1684}
1685
1686static int resolve_remote_submodule_branch(int argc, const char **argv,
1687                const char *prefix)
1688{
1689        const char *ret;
1690        struct strbuf sb = STRBUF_INIT;
1691        if (argc != 2)
1692                die("submodule--helper remote-branch takes exactly one arguments, got %d", argc);
1693
1694        ret = remote_submodule_branch(argv[1]);
1695        if (!ret)
1696                die("submodule %s doesn't exist", argv[1]);
1697
1698        printf("%s", ret);
1699        strbuf_release(&sb);
1700        return 0;
1701}
1702
1703static int push_check(int argc, const char **argv, const char *prefix)
1704{
1705        struct remote *remote;
1706        const char *superproject_head;
1707        char *head;
1708        int detached_head = 0;
1709        struct object_id head_oid;
1710
1711        if (argc < 3)
1712                die("submodule--helper push-check requires at least 2 arguments");
1713
1714        /*
1715         * superproject's resolved head ref.
1716         * if HEAD then the superproject is in a detached head state, otherwise
1717         * it will be the resolved head ref.
1718         */
1719        superproject_head = argv[1];
1720        argv++;
1721        argc--;
1722        /* Get the submodule's head ref and determine if it is detached */
1723        head = resolve_refdup("HEAD", 0, &head_oid, NULL);
1724        if (!head)
1725                die(_("Failed to resolve HEAD as a valid ref."));
1726        if (!strcmp(head, "HEAD"))
1727                detached_head = 1;
1728
1729        /*
1730         * The remote must be configured.
1731         * This is to avoid pushing to the exact same URL as the parent.
1732         */
1733        remote = pushremote_get(argv[1]);
1734        if (!remote || remote->origin == REMOTE_UNCONFIGURED)
1735                die("remote '%s' not configured", argv[1]);
1736
1737        /* Check the refspec */
1738        if (argc > 2) {
1739                int i, refspec_nr = argc - 2;
1740                struct ref *local_refs = get_local_heads();
1741                struct refspec *refspec = parse_push_refspec(refspec_nr,
1742                                                             argv + 2);
1743
1744                for (i = 0; i < refspec_nr; i++) {
1745                        struct refspec *rs = refspec + i;
1746
1747                        if (rs->pattern || rs->matching)
1748                                continue;
1749
1750                        /* LHS must match a single ref */
1751                        switch (count_refspec_match(rs->src, local_refs, NULL)) {
1752                        case 1:
1753                                break;
1754                        case 0:
1755                                /*
1756                                 * If LHS matches 'HEAD' then we need to ensure
1757                                 * that it matches the same named branch
1758                                 * checked out in the superproject.
1759                                 */
1760                                if (!strcmp(rs->src, "HEAD")) {
1761                                        if (!detached_head &&
1762                                            !strcmp(head, superproject_head))
1763                                                break;
1764                                        die("HEAD does not match the named branch in the superproject");
1765                                }
1766                                /* fallthrough */
1767                        default:
1768                                die("src refspec '%s' must name a ref",
1769                                    rs->src);
1770                        }
1771                }
1772                free_refspec(refspec_nr, refspec);
1773        }
1774        free(head);
1775
1776        return 0;
1777}
1778
1779static int absorb_git_dirs(int argc, const char **argv, const char *prefix)
1780{
1781        int i;
1782        struct pathspec pathspec;
1783        struct module_list list = MODULE_LIST_INIT;
1784        unsigned flags = ABSORB_GITDIR_RECURSE_SUBMODULES;
1785
1786        struct option embed_gitdir_options[] = {
1787                OPT_STRING(0, "prefix", &prefix,
1788                           N_("path"),
1789                           N_("path into the working tree")),
1790                OPT_BIT(0, "--recursive", &flags, N_("recurse into submodules"),
1791                        ABSORB_GITDIR_RECURSE_SUBMODULES),
1792                OPT_END()
1793        };
1794
1795        const char *const git_submodule_helper_usage[] = {
1796                N_("git submodule--helper embed-git-dir [<path>...]"),
1797                NULL
1798        };
1799
1800        argc = parse_options(argc, argv, prefix, embed_gitdir_options,
1801                             git_submodule_helper_usage, 0);
1802
1803        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0)
1804                return 1;
1805
1806        for (i = 0; i < list.nr; i++)
1807                absorb_git_dir_into_superproject(prefix,
1808                                list.entries[i]->name, flags);
1809
1810        return 0;
1811}
1812
1813static int is_active(int argc, const char **argv, const char *prefix)
1814{
1815        if (argc != 2)
1816                die("submodule--helper is-active takes exactly 1 argument");
1817
1818        return !is_submodule_active(the_repository, argv[1]);
1819}
1820
1821/*
1822 * Exit non-zero if any of the submodule names given on the command line is
1823 * invalid. If no names are given, filter stdin to print only valid names
1824 * (which is primarily intended for testing).
1825 */
1826static int check_name(int argc, const char **argv, const char *prefix)
1827{
1828        if (argc > 1) {
1829                while (*++argv) {
1830                        if (check_submodule_name(*argv) < 0)
1831                                return 1;
1832                }
1833        } else {
1834                struct strbuf buf = STRBUF_INIT;
1835                while (strbuf_getline(&buf, stdin) != EOF) {
1836                        if (!check_submodule_name(buf.buf))
1837                                printf("%s\n", buf.buf);
1838                }
1839                strbuf_release(&buf);
1840        }
1841        return 0;
1842}
1843
1844#define SUPPORT_SUPER_PREFIX (1<<0)
1845
1846struct cmd_struct {
1847        const char *cmd;
1848        int (*fn)(int, const char **, const char *);
1849        unsigned option;
1850};
1851
1852static struct cmd_struct commands[] = {
1853        {"list", module_list, 0},
1854        {"name", module_name, 0},
1855        {"clone", module_clone, 0},
1856        {"update-clone", update_clone, 0},
1857        {"relative-path", resolve_relative_path, 0},
1858        {"resolve-relative-url", resolve_relative_url, 0},
1859        {"resolve-relative-url-test", resolve_relative_url_test, 0},
1860        {"init", module_init, SUPPORT_SUPER_PREFIX},
1861        {"status", module_status, SUPPORT_SUPER_PREFIX},
1862        {"print-default-remote", print_default_remote, 0},
1863        {"sync", module_sync, SUPPORT_SUPER_PREFIX},
1864        {"deinit", module_deinit, 0},
1865        {"remote-branch", resolve_remote_submodule_branch, 0},
1866        {"push-check", push_check, 0},
1867        {"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
1868        {"is-active", is_active, 0},
1869        {"check-name", check_name, 0},
1870};
1871
1872int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
1873{
1874        int i;
1875        if (argc < 2 || !strcmp(argv[1], "-h"))
1876                usage("git submodule--helper <command>");
1877
1878        for (i = 0; i < ARRAY_SIZE(commands); i++) {
1879                if (!strcmp(argv[1], commands[i].cmd)) {
1880                        if (get_super_prefix() &&
1881                            !(commands[i].option & SUPPORT_SUPER_PREFIX))
1882                                die(_("%s doesn't support --super-prefix"),
1883                                    commands[i].cmd);
1884                        return commands[i].fn(argc - 1, argv + 1, prefix);
1885                }
1886        }
1887
1888        die(_("'%s' is not a valid submodule--helper "
1889              "subcommand"), argv[1]);
1890}