git.oblomov.eu Git - git/blob - builtin/fetch.c

   1 /*
   2  * "git fetch"
   3  */
   4 #include "cache.h"
   5 #include "refs.h"
   6 #include "commit.h"
   7 #include "builtin.h"
   8 #include "string-list.h"
   9 #include "remote.h"
  10 #include "transport.h"
  11 #include "run-command.h"
  12 #include "parse-options.h"
  13 #include "sigchain.h"
  14 #include "submodule-config.h"
  15 #include "submodule.h"
  16 #include "connected.h"
  17 #include "argv-array.h"
  18 #include "utf8.h"
  19
  20 static const char * const builtin_fetch_usage[] = {
  21         N_("git fetch [<options>] [<repository> [<refspec>...]]"),
  22         N_("git fetch [<options>] <group>"),
  23         N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
  24         N_("git fetch --all [<options>]"),
  25         NULL
  26 };
  27
  28 enum {
  29         TAGS_UNSET = 0,
  30         TAGS_DEFAULT = 1,
  31         TAGS_SET = 2
  32 };
  33
  34 static int fetch_prune_config = -1; /* unspecified */
  35 static int prune = -1; /* unspecified */
  36 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
  37
  38 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity;
  39 static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  40 static int tags = TAGS_DEFAULT, unshallow, update_shallow;
  41 static int max_children = -1;
  42 static enum transport_family family;
  43 static const char *depth;
  44 static const char *upload_pack;
  45 static struct strbuf default_rla = STRBUF_INIT;
  46 static struct transport *gtransport;
  47 static struct transport *gsecondary;
  48 static const char *submodule_prefix = "";
  49 static const char *recurse_submodules_default;
  50 static int shown_url = 0;
  51 static int refmap_alloc, refmap_nr;
  52 static const char **refmap_array;
  53
  54 static int option_parse_recurse_submodules(const struct option *opt,
  55                                    const char *arg, int unset)
  56 {
  57         if (unset) {
  58                 recurse_submodules = RECURSE_SUBMODULES_OFF;
  59         } else {
  60                 if (arg)
  61                         recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
  62                 else
  63                         recurse_submodules = RECURSE_SUBMODULES_ON;
  64         }
  65         return 0;
  66 }
  67
  68 static int git_fetch_config(const char *k, const char *v, void *cb)
  69 {
  70         if (!strcmp(k, "fetch.prune")) {
  71                 fetch_prune_config = git_config_bool(k, v);
  72                 return 0;
  73         }
  74         return git_default_config(k, v, cb);
  75 }
  76
  77 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
  78 {
  79         ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
  80
  81         /*
  82          * "git fetch --refmap='' origin foo"
  83          * can be used to tell the command not to store anywhere
  84          */
  85         if (*arg)
  86                 refmap_array[refmap_nr++] = arg;
  87         return 0;
  88 }
  89
  90 static struct option builtin_fetch_options[] = {
  91         OPT__VERBOSITY(&verbosity),
  92         OPT_BOOL(0, "all", &all,
  93                  N_("fetch from all remotes")),
  94         OPT_BOOL('a', "append", &append,
  95                  N_("append to .git/FETCH_HEAD instead of overwriting")),
  96         OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
  97                    N_("path to upload pack on remote end")),
  98         OPT__FORCE(&force, N_("force overwrite of local branch")),
  99         OPT_BOOL('m', "multiple", &multiple,
 100                  N_("fetch from multiple remotes")),
 101         OPT_SET_INT('t', "tags", &tags,
 102                     N_("fetch all tags and associated objects"), TAGS_SET),
 103         OPT_SET_INT('n', NULL, &tags,
 104                     N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 105         OPT_INTEGER('j', "jobs", &max_children,
 106                     N_("number of submodules fetched in parallel")),
 107         OPT_BOOL('p', "prune", &prune,
 108                  N_("prune remote-tracking branches no longer on remote")),
 109         { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
 110                     N_("control recursive fetching of submodules"),
 111                     PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 112         OPT_BOOL(0, "dry-run", &dry_run,
 113                  N_("dry run")),
 114         OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 115         OPT_BOOL('u', "update-head-ok", &update_head_ok,
 116                     N_("allow updating of HEAD ref")),
 117         OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 118         OPT_STRING(0, "depth", &depth, N_("depth"),
 119                    N_("deepen history of shallow clone")),
 120         { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
 121                    N_("convert to a complete repository"),
 122                    PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
 123         { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 124                    N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 125         { OPTION_STRING, 0, "recurse-submodules-default",
 126                    &recurse_submodules_default, NULL,
 127                    N_("default mode for recursion"), PARSE_OPT_HIDDEN },
 128         OPT_BOOL(0, "update-shallow", &update_shallow,
 129                  N_("accept refs that update .git/shallow")),
 130         { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
 131           N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
 132         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 133                         TRANSPORT_FAMILY_IPV4),
 134         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 135                         TRANSPORT_FAMILY_IPV6),
 136         OPT_END()
 137 };
 138
 139 static void unlock_pack(void)
 140 {
 141         if (gtransport)
 142                 transport_unlock_pack(gtransport);
 143         if (gsecondary)
 144                 transport_unlock_pack(gsecondary);
 145 }
 146
 147 static void unlock_pack_on_signal(int signo)
 148 {
 149         unlock_pack();
 150         sigchain_pop(signo);
 151         raise(signo);
 152 }
 153
 154 static void add_merge_config(struct ref **head,
 155                            const struct ref *remote_refs,
 156                            struct branch *branch,
 157                            struct ref ***tail)
 158 {
 159         int i;
 160
 161         for (i = 0; i < branch->merge_nr; i++) {
 162                 struct ref *rm, **old_tail = *tail;
 163                 struct refspec refspec;
 164
 165                 for (rm = *head; rm; rm = rm->next) {
 166                         if (branch_merge_matches(branch, i, rm->name)) {
 167                                 rm->fetch_head_status = FETCH_HEAD_MERGE;
 168                                 break;
 169                         }
 170                 }
 171                 if (rm)
 172                         continue;
 173
 174                 /*
 175                  * Not fetched to a remote-tracking branch?  We need to fetch
 176                  * it anyway to allow this branch's "branch.$name.merge"
 177                  * to be honored by 'git pull', but we do not have to
 178                  * fail if branch.$name.merge is misconfigured to point
 179                  * at a nonexisting branch.  If we were indeed called by
 180                  * 'git pull', it will notice the misconfiguration because
 181                  * there is no entry in the resulting FETCH_HEAD marked
 182                  * for merging.
 183                  */
 184                 memset(&refspec, 0, sizeof(refspec));
 185                 refspec.src = branch->merge[i]->src;
 186                 get_fetch_map(remote_refs, &refspec, tail, 1);
 187                 for (rm = *old_tail; rm; rm = rm->next)
 188                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 189         }
 190 }
 191
 192 static int add_existing(const char *refname, const struct object_id *oid,
 193                         int flag, void *cbdata)
 194 {
 195         struct string_list *list = (struct string_list *)cbdata;
 196         struct string_list_item *item = string_list_insert(list, refname);
 197         struct object_id *old_oid = xmalloc(sizeof(*old_oid));
 198
 199         oidcpy(old_oid, oid);
 200         item->util = old_oid;
 201         return 0;
 202 }
 203
 204 static int will_fetch(struct ref **head, const unsigned char *sha1)
 205 {
 206         struct ref *rm = *head;
 207         while (rm) {
 208                 if (!hashcmp(rm->old_oid.hash, sha1))
 209                         return 1;
 210                 rm = rm->next;
 211         }
 212         return 0;
 213 }
 214
 215 static void find_non_local_tags(struct transport *transport,
 216                         struct ref **head,
 217                         struct ref ***tail)
 218 {
 219         struct string_list existing_refs = STRING_LIST_INIT_DUP;
 220         struct string_list remote_refs = STRING_LIST_INIT_NODUP;
 221         const struct ref *ref;
 222         struct string_list_item *item = NULL;
 223
 224         for_each_ref(add_existing, &existing_refs);
 225         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 226                 if (!starts_with(ref->name, "refs/tags/"))
 227                         continue;
 228
 229                 /*
 230                  * The peeled ref always follows the matching base
 231                  * ref, so if we see a peeled ref that we don't want
 232                  * to fetch then we can mark the ref entry in the list
 233                  * as one to ignore by setting util to NULL.
 234                  */
 235                 if (ends_with(ref->name, "^{}")) {
 236                         if (item && !has_object_file(&ref->old_oid) &&
 237                             !will_fetch(head, ref->old_oid.hash) &&
 238                             !has_sha1_file(item->util) &&
 239                             !will_fetch(head, item->util))
 240                                 item->util = NULL;
 241                         item = NULL;
 242                         continue;
 243                 }
 244
 245                 /*
 246                  * If item is non-NULL here, then we previously saw a
 247                  * ref not followed by a peeled reference, so we need
 248                  * to check if it is a lightweight tag that we want to
 249                  * fetch.
 250                  */
 251                 if (item && !has_sha1_file(item->util) &&
 252                     !will_fetch(head, item->util))
 253                         item->util = NULL;
 254
 255                 item = NULL;
 256
 257                 /* skip duplicates and refs that we already have */
 258                 if (string_list_has_string(&remote_refs, ref->name) ||
 259                     string_list_has_string(&existing_refs, ref->name))
 260                         continue;
 261
 262                 item = string_list_insert(&remote_refs, ref->name);
 263                 item->util = (void *)&ref->old_oid;
 264         }
 265         string_list_clear(&existing_refs, 1);
 266
 267         /*
 268          * We may have a final lightweight tag that needs to be
 269          * checked to see if it needs fetching.
 270          */
 271         if (item && !has_sha1_file(item->util) &&
 272             !will_fetch(head, item->util))
 273                 item->util = NULL;
 274
 275         /*
 276          * For all the tags in the remote_refs string list,
 277          * add them to the list of refs to be fetched
 278          */
 279         for_each_string_list_item(item, &remote_refs) {
 280                 /* Unless we have already decided to ignore this item... */
 281                 if (item->util)
 282                 {
 283                         struct ref *rm = alloc_ref(item->string);
 284                         rm->peer_ref = alloc_ref(item->string);
 285                         oidcpy(&rm->old_oid, item->util);
 286                         **tail = rm;
 287                         *tail = &rm->next;
 288                 }
 289         }
 290
 291         string_list_clear(&remote_refs, 0);
 292 }
 293
 294 static struct ref *get_ref_map(struct transport *transport,
 295                                struct refspec *refspecs, int refspec_count,
 296                                int tags, int *autotags)
 297 {
 298         int i;
 299         struct ref *rm;
 300         struct ref *ref_map = NULL;
 301         struct ref **tail = &ref_map;
 302
 303         /* opportunistically-updated references: */
 304         struct ref *orefs = NULL, **oref_tail = &orefs;
 305
 306         const struct ref *remote_refs = transport_get_remote_refs(transport);
 307
 308         if (refspec_count) {
 309                 struct refspec *fetch_refspec;
 310                 int fetch_refspec_nr;
 311
 312                 for (i = 0; i < refspec_count; i++) {
 313                         get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
 314                         if (refspecs[i].dst && refspecs[i].dst[0])
 315                                 *autotags = 1;
 316                 }
 317                 /* Merge everything on the command line (but not --tags) */
 318                 for (rm = ref_map; rm; rm = rm->next)
 319                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 320
 321                 /*
 322                  * For any refs that we happen to be fetching via
 323                  * command-line arguments, the destination ref might
 324                  * have been missing or have been different than the
 325                  * remote-tracking ref that would be derived from the
 326                  * configured refspec.  In these cases, we want to
 327                  * take the opportunity to update their configured
 328                  * remote-tracking reference.  However, we do not want
 329                  * to mention these entries in FETCH_HEAD at all, as
 330                  * they would simply be duplicates of existing
 331                  * entries, so we set them FETCH_HEAD_IGNORE below.
 332                  *
 333                  * We compute these entries now, based only on the
 334                  * refspecs specified on the command line.  But we add
 335                  * them to the list following the refspecs resulting
 336                  * from the tags option so that one of the latter,
 337                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 338                  * by ref_remove_duplicates() in favor of one of these
 339                  * opportunistic entries with FETCH_HEAD_IGNORE.
 340                  */
 341                 if (refmap_array) {
 342                         fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
 343                         fetch_refspec_nr = refmap_nr;
 344                 } else {
 345                         fetch_refspec = transport->remote->fetch;
 346                         fetch_refspec_nr = transport->remote->fetch_refspec_nr;
 347                 }
 348
 349                 for (i = 0; i < fetch_refspec_nr; i++)
 350                         get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
 351
 352                 if (tags == TAGS_SET)
 353                         get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 354         } else if (refmap_array) {
 355                 die("--refmap option is only meaningful with command-line refspec(s).");
 356         } else {
 357                 /* Use the defaults */
 358                 struct remote *remote = transport->remote;
 359                 struct branch *branch = branch_get(NULL);
 360                 int has_merge = branch_has_merge_config(branch);
 361                 if (remote &&
 362                     (remote->fetch_refspec_nr ||
 363                      /* Note: has_merge implies non-NULL branch->remote_name */
 364                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 365                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 366                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 367                                 if (remote->fetch[i].dst &&
 368                                     remote->fetch[i].dst[0])
 369                                         *autotags = 1;
 370                                 if (!i && !has_merge && ref_map &&
 371                                     !remote->fetch[0].pattern)
 372                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 373                         }
 374                         /*
 375                          * if the remote we're fetching from is the same
 376                          * as given in branch.<name>.remote, we add the
 377                          * ref given in branch.<name>.merge, too.
 378                          *
 379                          * Note: has_merge implies non-NULL branch->remote_name
 380                          */
 381                         if (has_merge &&
 382                             !strcmp(branch->remote_name, remote->name))
 383                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 384                 } else {
 385                         ref_map = get_remote_ref(remote_refs, "HEAD");
 386                         if (!ref_map)
 387                                 die(_("Couldn't find remote ref HEAD"));
 388                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 389                         tail = &ref_map->next;
 390                 }
 391         }
 392
 393         if (tags == TAGS_SET)
 394                 /* also fetch all tags */
 395                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 396         else if (tags == TAGS_DEFAULT && *autotags)
 397                 find_non_local_tags(transport, &ref_map, &tail);
 398
 399         /* Now append any refs to be updated opportunistically: */
 400         *tail = orefs;
 401         for (rm = orefs; rm; rm = rm->next) {
 402                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
 403                 tail = &rm->next;
 404         }
 405
 406         return ref_remove_duplicates(ref_map);
 407 }
 408
 409 #define STORE_REF_ERROR_OTHER 1
 410 #define STORE_REF_ERROR_DF_CONFLICT 2
 411
 412 static int s_update_ref(const char *action,
 413                         struct ref *ref,
 414                         int check_old)
 415 {
 416         char msg[1024];
 417         char *rla = getenv("GIT_REFLOG_ACTION");
 418         struct ref_transaction *transaction;
 419         struct strbuf err = STRBUF_INIT;
 420         int ret, df_conflict = 0;
 421
 422         if (dry_run)
 423                 return 0;
 424         if (!rla)
 425                 rla = default_rla.buf;
 426         snprintf(msg, sizeof(msg), "%s: %s", rla, action);
 427
 428         transaction = ref_transaction_begin(&err);
 429         if (!transaction ||
 430             ref_transaction_update(transaction, ref->name,
 431                                    ref->new_oid.hash,
 432                                    check_old ? ref->old_oid.hash : NULL,
 433                                    0, msg, &err))
 434                 goto fail;
 435
 436         ret = ref_transaction_commit(transaction, &err);
 437         if (ret) {
 438                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 439                 goto fail;
 440         }
 441
 442         ref_transaction_free(transaction);
 443         strbuf_release(&err);
 444         return 0;
 445 fail:
 446         ref_transaction_free(transaction);
 447         error("%s", err.buf);
 448         strbuf_release(&err);
 449         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 450                            : STORE_REF_ERROR_OTHER;
 451 }
 452
 453 static int refcol_width = 10;
 454 static int compact_format;
 455
 456 static void adjust_refcol_width(const struct ref *ref)
 457 {
 458         int max, rlen, llen, len;
 459
 460         /* uptodate lines are only shown on high verbosity level */
 461         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 462                 return;
 463
 464         max    = term_columns();
 465         rlen   = utf8_strwidth(prettify_refname(ref->name));
 466
 467         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 468
 469         /*
 470          * rough estimation to see if the output line is too long and
 471          * should not be counted (we can't do precise calculation
 472          * anyway because we don't know if the error explanation part
 473          * will be printed in update_local_ref)
 474          */
 475         if (compact_format) {
 476                 llen = 0;
 477                 max = max * 2 / 3;
 478         }
 479         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 480         if (len >= max)
 481                 return;
 482
 483         /*
 484          * Not precise calculation for compact mode because '*' can
 485          * appear on the left hand side of '->' and shrink the column
 486          * back.
 487          */
 488         if (refcol_width < rlen)
 489                 refcol_width = rlen;
 490 }
 491
 492 static void prepare_format_display(struct ref *ref_map)
 493 {
 494         struct ref *rm;
 495         const char *format = "full";
 496
 497         git_config_get_string_const("fetch.output", &format);
 498         if (!strcasecmp(format, "full"))
 499                 compact_format = 0;
 500         else if (!strcasecmp(format, "compact"))
 501                 compact_format = 1;
 502         else
 503                 die(_("configuration fetch.output contains invalid value %s"),
 504                     format);
 505
 506         for (rm = ref_map; rm; rm = rm->next) {
 507                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 508                     !rm->peer_ref ||
 509                     !strcmp(rm->name, "HEAD"))
 510                         continue;
 511
 512                 adjust_refcol_width(rm);
 513         }
 514 }
 515
 516 static void print_remote_to_local(struct strbuf *display,
 517                                   const char *remote, const char *local)
 518 {
 519         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 520 }
 521
 522 static int find_and_replace(struct strbuf *haystack,
 523                             const char *needle,
 524                             const char *placeholder)
 525 {
 526         const char *p = strstr(haystack->buf, needle);
 527         int plen, nlen;
 528
 529         if (!p)
 530                 return 0;
 531
 532         if (p > haystack->buf && p[-1] != '/')
 533                 return 0;
 534
 535         plen = strlen(p);
 536         nlen = strlen(needle);
 537         if (plen > nlen && p[nlen] != '/')
 538                 return 0;
 539
 540         strbuf_splice(haystack, p - haystack->buf, nlen,
 541                       placeholder, strlen(placeholder));
 542         return 1;
 543 }
 544
 545 static void print_compact(struct strbuf *display,
 546                           const char *remote, const char *local)
 547 {
 548         struct strbuf r = STRBUF_INIT;
 549         struct strbuf l = STRBUF_INIT;
 550
 551         if (!strcmp(remote, local)) {
 552                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 553                 return;
 554         }
 555
 556         strbuf_addstr(&r, remote);
 557         strbuf_addstr(&l, local);
 558
 559         if (!find_and_replace(&r, local, "*"))
 560                 find_and_replace(&l, remote, "*");
 561         print_remote_to_local(display, r.buf, l.buf);
 562
 563         strbuf_release(&r);
 564         strbuf_release(&l);
 565 }
 566
 567 static void format_display(struct strbuf *display, char code,
 568                            const char *summary, const char *error,
 569                            const char *remote, const char *local)
 570 {
 571         strbuf_addf(display, "%c %-*s ", code, TRANSPORT_SUMMARY(summary));
 572         if (!compact_format)
 573                 print_remote_to_local(display, remote, local);
 574         else
 575                 print_compact(display, remote, local);
 576         if (error)
 577                 strbuf_addf(display, "  (%s)", error);
 578 }
 579
 580 static int update_local_ref(struct ref *ref,
 581                             const char *remote,
 582                             const struct ref *remote_ref,
 583                             struct strbuf *display)
 584 {
 585         struct commit *current = NULL, *updated;
 586         enum object_type type;
 587         struct branch *current_branch = branch_get(NULL);
 588         const char *pretty_ref = prettify_refname(ref->name);
 589
 590         type = sha1_object_info(ref->new_oid.hash, NULL);
 591         if (type < 0)
 592                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 593
 594         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 595                 if (verbosity > 0)
 596                         format_display(display, '=', _("[up to date]"), NULL,
 597                                        remote, pretty_ref);
 598                 return 0;
 599         }
 600
 601         if (current_branch &&
 602             !strcmp(ref->name, current_branch->name) &&
 603             !(update_head_ok || is_bare_repository()) &&
 604             !is_null_oid(&ref->old_oid)) {
 605                 /*
 606                  * If this is the head, and it's not okay to update
 607                  * the head, and the old value of the head isn't empty...
 608                  */
 609                 format_display(display, '!', _("[rejected]"),
 610                                _("can't fetch in current branch"),
 611                                remote, pretty_ref);
 612                 return 1;
 613         }
 614
 615         if (!is_null_oid(&ref->old_oid) &&
 616             starts_with(ref->name, "refs/tags/")) {
 617                 int r;
 618                 r = s_update_ref("updating tag", ref, 0);
 619                 format_display(display, r ? '!' : 't', _("[tag update]"),
 620                                r ? _("unable to update local ref") : NULL,
 621                                remote, pretty_ref);
 622                 return r;
 623         }
 624
 625         current = lookup_commit_reference_gently(ref->old_oid.hash, 1);
 626         updated = lookup_commit_reference_gently(ref->new_oid.hash, 1);
 627         if (!current || !updated) {
 628                 const char *msg;
 629                 const char *what;
 630                 int r;
 631                 /*
 632                  * Nicely describe the new ref we're fetching.
 633                  * Base this on the remote's ref name, as it's
 634                  * more likely to follow a standard layout.
 635                  */
 636                 const char *name = remote_ref ? remote_ref->name : "";
 637                 if (starts_with(name, "refs/tags/")) {
 638                         msg = "storing tag";
 639                         what = _("[new tag]");
 640                 } else if (starts_with(name, "refs/heads/")) {
 641                         msg = "storing head";
 642                         what = _("[new branch]");
 643                 } else {
 644                         msg = "storing ref";
 645                         what = _("[new ref]");
 646                 }
 647
 648                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 649                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 650                         check_for_new_submodule_commits(ref->new_oid.hash);
 651                 r = s_update_ref(msg, ref, 0);
 652                 format_display(display, r ? '!' : '*', what,
 653                                r ? _("unable to update local ref") : NULL,
 654                                remote, pretty_ref);
 655                 return r;
 656         }
 657
 658         if (in_merge_bases(current, updated)) {
 659                 struct strbuf quickref = STRBUF_INIT;
 660                 int r;
 661                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 662                 strbuf_addstr(&quickref, "..");
 663                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 664                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 665                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 666                         check_for_new_submodule_commits(ref->new_oid.hash);
 667                 r = s_update_ref("fast-forward", ref, 1);
 668                 format_display(display, r ? '!' : ' ', quickref.buf,
 669                                r ? _("unable to update local ref") : NULL,
 670                                remote, pretty_ref);
 671                 strbuf_release(&quickref);
 672                 return r;
 673         } else if (force || ref->force) {
 674                 struct strbuf quickref = STRBUF_INIT;
 675                 int r;
 676                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 677                 strbuf_addstr(&quickref, "...");
 678                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 679                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 680                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 681                         check_for_new_submodule_commits(ref->new_oid.hash);
 682                 r = s_update_ref("forced-update", ref, 1);
 683                 format_display(display, r ? '!' : '+', quickref.buf,
 684                                r ? _("unable to update local ref") : _("forced update"),
 685                                remote, pretty_ref);
 686                 strbuf_release(&quickref);
 687                 return r;
 688         } else {
 689                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 690                                remote, pretty_ref);
 691                 return 1;
 692         }
 693 }
 694
 695 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
 696 {
 697         struct ref **rm = cb_data;
 698         struct ref *ref = *rm;
 699
 700         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 701                 ref = ref->next;
 702         if (!ref)
 703                 return -1; /* end of the list */
 704         *rm = ref->next;
 705         hashcpy(sha1, ref->old_oid.hash);
 706         return 0;
 707 }
 708
 709 static int store_updated_refs(const char *raw_url, const char *remote_name,
 710                 struct ref *ref_map)
 711 {
 712         FILE *fp;
 713         struct commit *commit;
 714         int url_len, i, rc = 0;
 715         struct strbuf note = STRBUF_INIT;
 716         const char *what, *kind;
 717         struct ref *rm;
 718         char *url;
 719         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 720         int want_status;
 721
 722         fp = fopen(filename, "a");
 723         if (!fp)
 724                 return error_errno(_("cannot open %s"), filename);
 725
 726         if (raw_url)
 727                 url = transport_anonymize_url(raw_url);
 728         else
 729                 url = xstrdup("foreign");
 730
 731         rm = ref_map;
 732         if (check_everything_connected(iterate_ref_map, 0, &rm)) {
 733                 rc = error(_("%s did not send all necessary objects\n"), url);
 734                 goto abort;
 735         }
 736
 737         prepare_format_display(ref_map);
 738
 739         /*
 740          * We do a pass for each fetch_head_status type in their enum order, so
 741          * merged entries are written before not-for-merge. That lets readers
 742          * use FETCH_HEAD as a refname to refer to the ref to be merged.
 743          */
 744         for (want_status = FETCH_HEAD_MERGE;
 745              want_status <= FETCH_HEAD_IGNORE;
 746              want_status++) {
 747                 for (rm = ref_map; rm; rm = rm->next) {
 748                         struct ref *ref = NULL;
 749                         const char *merge_status_marker = "";
 750
 751                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 752                                 if (want_status == FETCH_HEAD_MERGE)
 753                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
 754                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
 755                                 continue;
 756                         }
 757
 758                         commit = lookup_commit_reference_gently(rm->old_oid.hash, 1);
 759                         if (!commit)
 760                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 761
 762                         if (rm->fetch_head_status != want_status)
 763                                 continue;
 764
 765                         if (rm->peer_ref) {
 766                                 ref = alloc_ref(rm->peer_ref->name);
 767                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 768                                 oidcpy(&ref->new_oid, &rm->old_oid);
 769                                 ref->force = rm->peer_ref->force;
 770                         }
 771
 772
 773                         if (!strcmp(rm->name, "HEAD")) {
 774                                 kind = "";
 775                                 what = "";
 776                         }
 777                         else if (starts_with(rm->name, "refs/heads/")) {
 778                                 kind = "branch";
 779                                 what = rm->name + 11;
 780                         }
 781                         else if (starts_with(rm->name, "refs/tags/")) {
 782                                 kind = "tag";
 783                                 what = rm->name + 10;
 784                         }
 785                         else if (starts_with(rm->name, "refs/remotes/")) {
 786                                 kind = "remote-tracking branch";
 787                                 what = rm->name + 13;
 788                         }
 789                         else {
 790                                 kind = "";
 791                                 what = rm->name;
 792                         }
 793
 794                         url_len = strlen(url);
 795                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 796                                 ;
 797                         url_len = i + 1;
 798                         if (4 < i && !strncmp(".git", url + i - 3, 4))
 799                                 url_len = i - 3;
 800
 801                         strbuf_reset(&note);
 802                         if (*what) {
 803                                 if (*kind)
 804                                         strbuf_addf(&note, "%s ", kind);
 805                                 strbuf_addf(&note, "'%s' of ", what);
 806                         }
 807                         switch (rm->fetch_head_status) {
 808                         case FETCH_HEAD_NOT_FOR_MERGE:
 809                                 merge_status_marker = "not-for-merge";
 810                                 /* fall-through */
 811                         case FETCH_HEAD_MERGE:
 812                                 fprintf(fp, "%s\t%s\t%s",
 813                                         oid_to_hex(&rm->old_oid),
 814                                         merge_status_marker,
 815                                         note.buf);
 816                                 for (i = 0; i < url_len; ++i)
 817                                         if ('\n' == url[i])
 818                                                 fputs("\\n", fp);
 819                                         else
 820                                                 fputc(url[i], fp);
 821                                 fputc('\n', fp);
 822                                 break;
 823                         default:
 824                                 /* do not write anything to FETCH_HEAD */
 825                                 break;
 826                         }
 827
 828                         strbuf_reset(&note);
 829                         if (ref) {
 830                                 rc |= update_local_ref(ref, what, rm, &note);
 831                                 free(ref);
 832                         } else
 833                                 format_display(&note, '*',
 834                                                *kind ? kind : "branch", NULL,
 835                                                *what ? what : "HEAD",
 836                                                "FETCH_HEAD");
 837                         if (note.len) {
 838                                 if (verbosity >= 0 && !shown_url) {
 839                                         fprintf(stderr, _("From %.*s\n"),
 840                                                         url_len, url);
 841                                         shown_url = 1;
 842                                 }
 843                                 if (verbosity >= 0)
 844                                         fprintf(stderr, " %s\n", note.buf);
 845                         }
 846                 }
 847         }
 848
 849         if (rc & STORE_REF_ERROR_DF_CONFLICT)
 850                 error(_("some local refs could not be updated; try running\n"
 851                       " 'git remote prune %s' to remove any old, conflicting "
 852                       "branches"), remote_name);
 853
 854  abort:
 855         strbuf_release(&note);
 856         free(url);
 857         fclose(fp);
 858         return rc;
 859 }
 860
 861 /*
 862  * We would want to bypass the object transfer altogether if
 863  * everything we are going to fetch already exists and is connected
 864  * locally.
 865  */
 866 static int quickfetch(struct ref *ref_map)
 867 {
 868         struct ref *rm = ref_map;
 869
 870         /*
 871          * If we are deepening a shallow clone we already have these
 872          * objects reachable.  Running rev-list here will return with
 873          * a good (0) exit status and we'll bypass the fetch that we
 874          * really need to perform.  Claiming failure now will ensure
 875          * we perform the network exchange to deepen our history.
 876          */
 877         if (depth)
 878                 return -1;
 879         return check_everything_connected(iterate_ref_map, 1, &rm);
 880 }
 881
 882 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 883 {
 884         int ret = quickfetch(ref_map);
 885         if (ret)
 886                 ret = transport_fetch_refs(transport, ref_map);
 887         if (!ret)
 888                 ret |= store_updated_refs(transport->url,
 889                                 transport->remote->name,
 890                                 ref_map);
 891         transport_unlock_pack(transport);
 892         return ret;
 893 }
 894
 895 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 896                 const char *raw_url)
 897 {
 898         int url_len, i, result = 0;
 899         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 900         char *url;
 901         const char *dangling_msg = dry_run
 902                 ? _("   (%s will become dangling)")
 903                 : _("   (%s has become dangling)");
 904
 905         if (raw_url)
 906                 url = transport_anonymize_url(raw_url);
 907         else
 908                 url = xstrdup("foreign");
 909
 910         url_len = strlen(url);
 911         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 912                 ;
 913
 914         url_len = i + 1;
 915         if (4 < i && !strncmp(".git", url + i - 3, 4))
 916                 url_len = i - 3;
 917
 918         if (!dry_run) {
 919                 struct string_list refnames = STRING_LIST_INIT_NODUP;
 920
 921                 for (ref = stale_refs; ref; ref = ref->next)
 922                         string_list_append(&refnames, ref->name);
 923
 924                 result = delete_refs(&refnames, 0);
 925                 string_list_clear(&refnames, 0);
 926         }
 927
 928         if (verbosity >= 0) {
 929                 for (ref = stale_refs; ref; ref = ref->next) {
 930                         struct strbuf sb = STRBUF_INIT;
 931                         if (!shown_url) {
 932                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
 933                                 shown_url = 1;
 934                         }
 935                         format_display(&sb, '-', _("[deleted]"), NULL,
 936                                        _("(none)"), prettify_refname(ref->name));
 937                         fprintf(stderr, " %s\n",sb.buf);
 938                         strbuf_release(&sb);
 939                         warn_dangling_symref(stderr, dangling_msg, ref->name);
 940                 }
 941         }
 942
 943         free(url);
 944         free_refs(stale_refs);
 945         return result;
 946 }
 947
 948 static void check_not_current_branch(struct ref *ref_map)
 949 {
 950         struct branch *current_branch = branch_get(NULL);
 951
 952         if (is_bare_repository() || !current_branch)
 953                 return;
 954
 955         for (; ref_map; ref_map = ref_map->next)
 956                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
 957                                         ref_map->peer_ref->name))
 958                         die(_("Refusing to fetch into current branch %s "
 959                             "of non-bare repository"), current_branch->refname);
 960 }
 961
 962 static int truncate_fetch_head(void)
 963 {
 964         const char *filename = git_path_fetch_head();
 965         FILE *fp = fopen_for_writing(filename);
 966
 967         if (!fp)
 968                 return error_errno(_("cannot open %s"), filename);
 969         fclose(fp);
 970         return 0;
 971 }
 972
 973 static void set_option(struct transport *transport, const char *name, const char *value)
 974 {
 975         int r = transport_set_option(transport, name, value);
 976         if (r < 0)
 977                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
 978                     name, value, transport->url);
 979         if (r > 0)
 980                 warning(_("Option \"%s\" is ignored for %s\n"),
 981                         name, transport->url);
 982 }
 983
 984 static struct transport *prepare_transport(struct remote *remote)
 985 {
 986         struct transport *transport;
 987         transport = transport_get(remote, NULL);
 988         transport_set_verbosity(transport, verbosity, progress);
 989         transport->family = family;
 990         if (upload_pack)
 991                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
 992         if (keep)
 993                 set_option(transport, TRANS_OPT_KEEP, "yes");
 994         if (depth)
 995                 set_option(transport, TRANS_OPT_DEPTH, depth);
 996         if (update_shallow)
 997                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
 998         return transport;
 999 }
1000
1001 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1002 {
1003         if (transport->cannot_reuse) {
1004                 gsecondary = prepare_transport(transport->remote);
1005                 transport = gsecondary;
1006         }
1007
1008         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1009         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1010         fetch_refs(transport, ref_map);
1011
1012         if (gsecondary) {
1013                 transport_disconnect(gsecondary);
1014                 gsecondary = NULL;
1015         }
1016 }
1017
1018 static int do_fetch(struct transport *transport,
1019                     struct refspec *refs, int ref_count)
1020 {
1021         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1022         struct ref *ref_map;
1023         struct ref *rm;
1024         int autotags = (transport->remote->fetch_tags == 1);
1025         int retcode = 0;
1026
1027         for_each_ref(add_existing, &existing_refs);
1028
1029         if (tags == TAGS_DEFAULT) {
1030                 if (transport->remote->fetch_tags == 2)
1031                         tags = TAGS_SET;
1032                 if (transport->remote->fetch_tags == -1)
1033                         tags = TAGS_UNSET;
1034         }
1035
1036         if (!transport->get_refs_list || !transport->fetch)
1037                 die(_("Don't know how to fetch from %s"), transport->url);
1038
1039         /* if not appending, truncate FETCH_HEAD */
1040         if (!append && !dry_run) {
1041                 retcode = truncate_fetch_head();
1042                 if (retcode)
1043                         goto cleanup;
1044         }
1045
1046         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1047         if (!update_head_ok)
1048                 check_not_current_branch(ref_map);
1049
1050         for (rm = ref_map; rm; rm = rm->next) {
1051                 if (rm->peer_ref) {
1052                         struct string_list_item *peer_item =
1053                                 string_list_lookup(&existing_refs,
1054                                                    rm->peer_ref->name);
1055                         if (peer_item) {
1056                                 struct object_id *old_oid = peer_item->util;
1057                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1058                         }
1059                 }
1060         }
1061
1062         if (tags == TAGS_DEFAULT && autotags)
1063                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1064         if (prune) {
1065                 /*
1066                  * We only prune based on refspecs specified
1067                  * explicitly (via command line or configuration); we
1068                  * don't care whether --tags was specified.
1069                  */
1070                 if (ref_count) {
1071                         prune_refs(refs, ref_count, ref_map, transport->url);
1072                 } else {
1073                         prune_refs(transport->remote->fetch,
1074                                    transport->remote->fetch_refspec_nr,
1075                                    ref_map,
1076                                    transport->url);
1077                 }
1078         }
1079         if (fetch_refs(transport, ref_map)) {
1080                 free_refs(ref_map);
1081                 retcode = 1;
1082                 goto cleanup;
1083         }
1084         free_refs(ref_map);
1085
1086         /* if neither --no-tags nor --tags was specified, do automated tag
1087          * following ... */
1088         if (tags == TAGS_DEFAULT && autotags) {
1089                 struct ref **tail = &ref_map;
1090                 ref_map = NULL;
1091                 find_non_local_tags(transport, &ref_map, &tail);
1092                 if (ref_map)
1093                         backfill_tags(transport, ref_map);
1094                 free_refs(ref_map);
1095         }
1096
1097  cleanup:
1098         string_list_clear(&existing_refs, 1);
1099         return retcode;
1100 }
1101
1102 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1103 {
1104         struct string_list *list = priv;
1105         if (!remote->skip_default_update)
1106                 string_list_append(list, remote->name);
1107         return 0;
1108 }
1109
1110 struct remote_group_data {
1111         const char *name;
1112         struct string_list *list;
1113 };
1114
1115 static int get_remote_group(const char *key, const char *value, void *priv)
1116 {
1117         struct remote_group_data *g = priv;
1118
1119         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1120                 /* split list by white space */
1121                 while (*value) {
1122                         size_t wordlen = strcspn(value, " \t\n");
1123
1124                         if (wordlen >= 1)
1125                                 string_list_append_nodup(g->list,
1126                                                    xstrndup(value, wordlen));
1127                         value += wordlen + (value[wordlen] != '\0');
1128                 }
1129         }
1130
1131         return 0;
1132 }
1133
1134 static int add_remote_or_group(const char *name, struct string_list *list)
1135 {
1136         int prev_nr = list->nr;
1137         struct remote_group_data g;
1138         g.name = name; g.list = list;
1139
1140         git_config(get_remote_group, &g);
1141         if (list->nr == prev_nr) {
1142                 struct remote *remote = remote_get(name);
1143                 if (!remote_is_configured(remote))
1144                         return 0;
1145                 string_list_append(list, remote->name);
1146         }
1147         return 1;
1148 }
1149
1150 static void add_options_to_argv(struct argv_array *argv)
1151 {
1152         if (dry_run)
1153                 argv_array_push(argv, "--dry-run");
1154         if (prune != -1)
1155                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1156         if (update_head_ok)
1157                 argv_array_push(argv, "--update-head-ok");
1158         if (force)
1159                 argv_array_push(argv, "--force");
1160         if (keep)
1161                 argv_array_push(argv, "--keep");
1162         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1163                 argv_array_push(argv, "--recurse-submodules");
1164         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1165                 argv_array_push(argv, "--recurse-submodules=on-demand");
1166         if (tags == TAGS_SET)
1167                 argv_array_push(argv, "--tags");
1168         else if (tags == TAGS_UNSET)
1169                 argv_array_push(argv, "--no-tags");
1170         if (verbosity >= 2)
1171                 argv_array_push(argv, "-v");
1172         if (verbosity >= 1)
1173                 argv_array_push(argv, "-v");
1174         else if (verbosity < 0)
1175                 argv_array_push(argv, "-q");
1176
1177 }
1178
1179 static int fetch_multiple(struct string_list *list)
1180 {
1181         int i, result = 0;
1182         struct argv_array argv = ARGV_ARRAY_INIT;
1183
1184         if (!append && !dry_run) {
1185                 int errcode = truncate_fetch_head();
1186                 if (errcode)
1187                         return errcode;
1188         }
1189
1190         argv_array_pushl(&argv, "fetch", "--append", NULL);
1191         add_options_to_argv(&argv);
1192
1193         for (i = 0; i < list->nr; i++) {
1194                 const char *name = list->items[i].string;
1195                 argv_array_push(&argv, name);
1196                 if (verbosity >= 0)
1197                         printf(_("Fetching %s\n"), name);
1198                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1199                         error(_("Could not fetch %s"), name);
1200                         result = 1;
1201                 }
1202                 argv_array_pop(&argv);
1203         }
1204
1205         argv_array_clear(&argv);
1206         return result;
1207 }
1208
1209 static int fetch_one(struct remote *remote, int argc, const char **argv)
1210 {
1211         static const char **refs = NULL;
1212         struct refspec *refspec;
1213         int ref_nr = 0;
1214         int exit_code;
1215
1216         if (!remote)
1217                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1218                     "remote name from which new revisions should be fetched."));
1219
1220         gtransport = prepare_transport(remote);
1221
1222         if (prune < 0) {
1223                 /* no command line request */
1224                 if (0 <= gtransport->remote->prune)
1225                         prune = gtransport->remote->prune;
1226                 else if (0 <= fetch_prune_config)
1227                         prune = fetch_prune_config;
1228                 else
1229                         prune = PRUNE_BY_DEFAULT;
1230         }
1231
1232         if (argc > 0) {
1233                 int j = 0;
1234                 int i;
1235                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1236                 for (i = 0; i < argc; i++) {
1237                         if (!strcmp(argv[i], "tag")) {
1238                                 i++;
1239                                 if (i >= argc)
1240                                         die(_("You need to specify a tag name."));
1241                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1242                                                     argv[i], argv[i]);
1243                         } else
1244                                 refs[j++] = argv[i];
1245                 }
1246                 refs[j] = NULL;
1247                 ref_nr = j;
1248         }
1249
1250         sigchain_push_common(unlock_pack_on_signal);
1251         atexit(unlock_pack);
1252         refspec = parse_fetch_refspec(ref_nr, refs);
1253         exit_code = do_fetch(gtransport, refspec, ref_nr);
1254         free_refspec(ref_nr, refspec);
1255         transport_disconnect(gtransport);
1256         gtransport = NULL;
1257         return exit_code;
1258 }
1259
1260 int cmd_fetch(int argc, const char **argv, const char *prefix)
1261 {
1262         int i;
1263         struct string_list list = STRING_LIST_INIT_DUP;
1264         struct remote *remote;
1265         int result = 0;
1266         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1267
1268         packet_trace_identity("fetch");
1269
1270         /* Record the command line for the reflog */
1271         strbuf_addstr(&default_rla, "fetch");
1272         for (i = 1; i < argc; i++)
1273                 strbuf_addf(&default_rla, " %s", argv[i]);
1274
1275         git_config(git_fetch_config, NULL);
1276
1277         argc = parse_options(argc, argv, prefix,
1278                              builtin_fetch_options, builtin_fetch_usage, 0);
1279
1280         if (unshallow) {
1281                 if (depth)
1282                         die(_("--depth and --unshallow cannot be used together"));
1283                 else if (!is_repository_shallow())
1284                         die(_("--unshallow on a complete repository does not make sense"));
1285                 else
1286                         depth = xstrfmt("%d", INFINITE_DEPTH);
1287         }
1288
1289         /* no need to be strict, transport_set_option() will validate it again */
1290         if (depth && atoi(depth) < 1)
1291                 die(_("depth %s is not a positive number"), depth);
1292
1293         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1294                 if (recurse_submodules_default) {
1295                         int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1296                         set_config_fetch_recurse_submodules(arg);
1297                 }
1298                 gitmodules_config();
1299                 git_config(submodule_config, NULL);
1300         }
1301
1302         if (all) {
1303                 if (argc == 1)
1304                         die(_("fetch --all does not take a repository argument"));
1305                 else if (argc > 1)
1306                         die(_("fetch --all does not make sense with refspecs"));
1307                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1308                 result = fetch_multiple(&list);
1309         } else if (argc == 0) {
1310                 /* No arguments -- use default remote */
1311                 remote = remote_get(NULL);
1312                 result = fetch_one(remote, argc, argv);
1313         } else if (multiple) {
1314                 /* All arguments are assumed to be remotes or groups */
1315                 for (i = 0; i < argc; i++)
1316                         if (!add_remote_or_group(argv[i], &list))
1317                                 die(_("No such remote or remote group: %s"), argv[i]);
1318                 result = fetch_multiple(&list);
1319         } else {
1320                 /* Single remote or group */
1321                 (void) add_remote_or_group(argv[0], &list);
1322                 if (list.nr > 1) {
1323                         /* More than one remote */
1324                         if (argc > 1)
1325                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1326                         result = fetch_multiple(&list);
1327                 } else {
1328                         /* Zero or one remotes */
1329                         remote = remote_get(argv[0]);
1330                         result = fetch_one(remote, argc-1, argv+1);
1331                 }
1332         }
1333
1334         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1335                 struct argv_array options = ARGV_ARRAY_INIT;
1336
1337                 add_options_to_argv(&options);
1338                 result = fetch_populated_submodules(&options,
1339                                                     submodule_prefix,
1340                                                     recurse_submodules,
1341                                                     verbosity < 0,
1342                                                     max_children);
1343                 argv_array_clear(&options);
1344         }
1345
1346         string_list_clear(&list, 0);
1347
1348         close_all_packs();
1349
1350         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1351         if (verbosity < 0)
1352                 argv_array_push(&argv_gc_auto, "--quiet");
1353         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1354         argv_array_clear(&argv_gc_auto);
1355
1356         return result;
1357 }