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 &&
 237                             !has_object_file_with_flags(&ref->old_oid, HAS_SHA1_QUICK) &&
 238                             !will_fetch(head, ref->old_oid.hash) &&
 239                             !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
 240                             !will_fetch(head, item->util))
 241                                 item->util = NULL;
 242                         item = NULL;
 243                         continue;
 244                 }
 245
 246                 /*
 247                  * If item is non-NULL here, then we previously saw a
 248                  * ref not followed by a peeled reference, so we need
 249                  * to check if it is a lightweight tag that we want to
 250                  * fetch.
 251                  */
 252                 if (item &&
 253                     !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
 254                     !will_fetch(head, item->util))
 255                         item->util = NULL;
 256
 257                 item = NULL;
 258
 259                 /* skip duplicates and refs that we already have */
 260                 if (string_list_has_string(&remote_refs, ref->name) ||
 261                     string_list_has_string(&existing_refs, ref->name))
 262                         continue;
 263
 264                 item = string_list_insert(&remote_refs, ref->name);
 265                 item->util = (void *)&ref->old_oid;
 266         }
 267         string_list_clear(&existing_refs, 1);
 268
 269         /*
 270          * We may have a final lightweight tag that needs to be
 271          * checked to see if it needs fetching.
 272          */
 273         if (item &&
 274             !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
 275             !will_fetch(head, item->util))
 276                 item->util = NULL;
 277
 278         /*
 279          * For all the tags in the remote_refs string list,
 280          * add them to the list of refs to be fetched
 281          */
 282         for_each_string_list_item(item, &remote_refs) {
 283                 /* Unless we have already decided to ignore this item... */
 284                 if (item->util)
 285                 {
 286                         struct ref *rm = alloc_ref(item->string);
 287                         rm->peer_ref = alloc_ref(item->string);
 288                         oidcpy(&rm->old_oid, item->util);
 289                         **tail = rm;
 290                         *tail = &rm->next;
 291                 }
 292         }
 293
 294         string_list_clear(&remote_refs, 0);
 295 }
 296
 297 static struct ref *get_ref_map(struct transport *transport,
 298                                struct refspec *refspecs, int refspec_count,
 299                                int tags, int *autotags)
 300 {
 301         int i;
 302         struct ref *rm;
 303         struct ref *ref_map = NULL;
 304         struct ref **tail = &ref_map;
 305
 306         /* opportunistically-updated references: */
 307         struct ref *orefs = NULL, **oref_tail = &orefs;
 308
 309         const struct ref *remote_refs = transport_get_remote_refs(transport);
 310
 311         if (refspec_count) {
 312                 struct refspec *fetch_refspec;
 313                 int fetch_refspec_nr;
 314
 315                 for (i = 0; i < refspec_count; i++) {
 316                         get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
 317                         if (refspecs[i].dst && refspecs[i].dst[0])
 318                                 *autotags = 1;
 319                 }
 320                 /* Merge everything on the command line (but not --tags) */
 321                 for (rm = ref_map; rm; rm = rm->next)
 322                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 323
 324                 /*
 325                  * For any refs that we happen to be fetching via
 326                  * command-line arguments, the destination ref might
 327                  * have been missing or have been different than the
 328                  * remote-tracking ref that would be derived from the
 329                  * configured refspec.  In these cases, we want to
 330                  * take the opportunity to update their configured
 331                  * remote-tracking reference.  However, we do not want
 332                  * to mention these entries in FETCH_HEAD at all, as
 333                  * they would simply be duplicates of existing
 334                  * entries, so we set them FETCH_HEAD_IGNORE below.
 335                  *
 336                  * We compute these entries now, based only on the
 337                  * refspecs specified on the command line.  But we add
 338                  * them to the list following the refspecs resulting
 339                  * from the tags option so that one of the latter,
 340                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 341                  * by ref_remove_duplicates() in favor of one of these
 342                  * opportunistic entries with FETCH_HEAD_IGNORE.
 343                  */
 344                 if (refmap_array) {
 345                         fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
 346                         fetch_refspec_nr = refmap_nr;
 347                 } else {
 348                         fetch_refspec = transport->remote->fetch;
 349                         fetch_refspec_nr = transport->remote->fetch_refspec_nr;
 350                 }
 351
 352                 for (i = 0; i < fetch_refspec_nr; i++)
 353                         get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
 354
 355                 if (tags == TAGS_SET)
 356                         get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 357         } else if (refmap_array) {
 358                 die("--refmap option is only meaningful with command-line refspec(s).");
 359         } else {
 360                 /* Use the defaults */
 361                 struct remote *remote = transport->remote;
 362                 struct branch *branch = branch_get(NULL);
 363                 int has_merge = branch_has_merge_config(branch);
 364                 if (remote &&
 365                     (remote->fetch_refspec_nr ||
 366                      /* Note: has_merge implies non-NULL branch->remote_name */
 367                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 368                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 369                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 370                                 if (remote->fetch[i].dst &&
 371                                     remote->fetch[i].dst[0])
 372                                         *autotags = 1;
 373                                 if (!i && !has_merge && ref_map &&
 374                                     !remote->fetch[0].pattern)
 375                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 376                         }
 377                         /*
 378                          * if the remote we're fetching from is the same
 379                          * as given in branch.<name>.remote, we add the
 380                          * ref given in branch.<name>.merge, too.
 381                          *
 382                          * Note: has_merge implies non-NULL branch->remote_name
 383                          */
 384                         if (has_merge &&
 385                             !strcmp(branch->remote_name, remote->name))
 386                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 387                 } else {
 388                         ref_map = get_remote_ref(remote_refs, "HEAD");
 389                         if (!ref_map)
 390                                 die(_("Couldn't find remote ref HEAD"));
 391                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 392                         tail = &ref_map->next;
 393                 }
 394         }
 395
 396         if (tags == TAGS_SET)
 397                 /* also fetch all tags */
 398                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 399         else if (tags == TAGS_DEFAULT && *autotags)
 400                 find_non_local_tags(transport, &ref_map, &tail);
 401
 402         /* Now append any refs to be updated opportunistically: */
 403         *tail = orefs;
 404         for (rm = orefs; rm; rm = rm->next) {
 405                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
 406                 tail = &rm->next;
 407         }
 408
 409         return ref_remove_duplicates(ref_map);
 410 }
 411
 412 #define STORE_REF_ERROR_OTHER 1
 413 #define STORE_REF_ERROR_DF_CONFLICT 2
 414
 415 static int s_update_ref(const char *action,
 416                         struct ref *ref,
 417                         int check_old)
 418 {
 419         char msg[1024];
 420         char *rla = getenv("GIT_REFLOG_ACTION");
 421         struct ref_transaction *transaction;
 422         struct strbuf err = STRBUF_INIT;
 423         int ret, df_conflict = 0;
 424
 425         if (dry_run)
 426                 return 0;
 427         if (!rla)
 428                 rla = default_rla.buf;
 429         snprintf(msg, sizeof(msg), "%s: %s", rla, action);
 430
 431         transaction = ref_transaction_begin(&err);
 432         if (!transaction ||
 433             ref_transaction_update(transaction, ref->name,
 434                                    ref->new_oid.hash,
 435                                    check_old ? ref->old_oid.hash : NULL,
 436                                    0, msg, &err))
 437                 goto fail;
 438
 439         ret = ref_transaction_commit(transaction, &err);
 440         if (ret) {
 441                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 442                 goto fail;
 443         }
 444
 445         ref_transaction_free(transaction);
 446         strbuf_release(&err);
 447         return 0;
 448 fail:
 449         ref_transaction_free(transaction);
 450         error("%s", err.buf);
 451         strbuf_release(&err);
 452         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 453                            : STORE_REF_ERROR_OTHER;
 454 }
 455
 456 static int refcol_width = 10;
 457 static int compact_format;
 458
 459 static void adjust_refcol_width(const struct ref *ref)
 460 {
 461         int max, rlen, llen, len;
 462
 463         /* uptodate lines are only shown on high verbosity level */
 464         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 465                 return;
 466
 467         max    = term_columns();
 468         rlen   = utf8_strwidth(prettify_refname(ref->name));
 469
 470         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 471
 472         /*
 473          * rough estimation to see if the output line is too long and
 474          * should not be counted (we can't do precise calculation
 475          * anyway because we don't know if the error explanation part
 476          * will be printed in update_local_ref)
 477          */
 478         if (compact_format) {
 479                 llen = 0;
 480                 max = max * 2 / 3;
 481         }
 482         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 483         if (len >= max)
 484                 return;
 485
 486         /*
 487          * Not precise calculation for compact mode because '*' can
 488          * appear on the left hand side of '->' and shrink the column
 489          * back.
 490          */
 491         if (refcol_width < rlen)
 492                 refcol_width = rlen;
 493 }
 494
 495 static void prepare_format_display(struct ref *ref_map)
 496 {
 497         struct ref *rm;
 498         const char *format = "full";
 499
 500         git_config_get_string_const("fetch.output", &format);
 501         if (!strcasecmp(format, "full"))
 502                 compact_format = 0;
 503         else if (!strcasecmp(format, "compact"))
 504                 compact_format = 1;
 505         else
 506                 die(_("configuration fetch.output contains invalid value %s"),
 507                     format);
 508
 509         for (rm = ref_map; rm; rm = rm->next) {
 510                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 511                     !rm->peer_ref ||
 512                     !strcmp(rm->name, "HEAD"))
 513                         continue;
 514
 515                 adjust_refcol_width(rm);
 516         }
 517 }
 518
 519 static void print_remote_to_local(struct strbuf *display,
 520                                   const char *remote, const char *local)
 521 {
 522         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 523 }
 524
 525 static int find_and_replace(struct strbuf *haystack,
 526                             const char *needle,
 527                             const char *placeholder)
 528 {
 529         const char *p = strstr(haystack->buf, needle);
 530         int plen, nlen;
 531
 532         if (!p)
 533                 return 0;
 534
 535         if (p > haystack->buf && p[-1] != '/')
 536                 return 0;
 537
 538         plen = strlen(p);
 539         nlen = strlen(needle);
 540         if (plen > nlen && p[nlen] != '/')
 541                 return 0;
 542
 543         strbuf_splice(haystack, p - haystack->buf, nlen,
 544                       placeholder, strlen(placeholder));
 545         return 1;
 546 }
 547
 548 static void print_compact(struct strbuf *display,
 549                           const char *remote, const char *local)
 550 {
 551         struct strbuf r = STRBUF_INIT;
 552         struct strbuf l = STRBUF_INIT;
 553
 554         if (!strcmp(remote, local)) {
 555                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 556                 return;
 557         }
 558
 559         strbuf_addstr(&r, remote);
 560         strbuf_addstr(&l, local);
 561
 562         if (!find_and_replace(&r, local, "*"))
 563                 find_and_replace(&l, remote, "*");
 564         print_remote_to_local(display, r.buf, l.buf);
 565
 566         strbuf_release(&r);
 567         strbuf_release(&l);
 568 }
 569
 570 static void format_display(struct strbuf *display, char code,
 571                            const char *summary, const char *error,
 572                            const char *remote, const char *local)
 573 {
 574         strbuf_addf(display, "%c %-*s ", code, TRANSPORT_SUMMARY(summary));
 575         if (!compact_format)
 576                 print_remote_to_local(display, remote, local);
 577         else
 578                 print_compact(display, remote, local);
 579         if (error)
 580                 strbuf_addf(display, "  (%s)", error);
 581 }
 582
 583 static int update_local_ref(struct ref *ref,
 584                             const char *remote,
 585                             const struct ref *remote_ref,
 586                             struct strbuf *display)
 587 {
 588         struct commit *current = NULL, *updated;
 589         enum object_type type;
 590         struct branch *current_branch = branch_get(NULL);
 591         const char *pretty_ref = prettify_refname(ref->name);
 592
 593         type = sha1_object_info(ref->new_oid.hash, NULL);
 594         if (type < 0)
 595                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 596
 597         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 598                 if (verbosity > 0)
 599                         format_display(display, '=', _("[up to date]"), NULL,
 600                                        remote, pretty_ref);
 601                 return 0;
 602         }
 603
 604         if (current_branch &&
 605             !strcmp(ref->name, current_branch->name) &&
 606             !(update_head_ok || is_bare_repository()) &&
 607             !is_null_oid(&ref->old_oid)) {
 608                 /*
 609                  * If this is the head, and it's not okay to update
 610                  * the head, and the old value of the head isn't empty...
 611                  */
 612                 format_display(display, '!', _("[rejected]"),
 613                                _("can't fetch in current branch"),
 614                                remote, pretty_ref);
 615                 return 1;
 616         }
 617
 618         if (!is_null_oid(&ref->old_oid) &&
 619             starts_with(ref->name, "refs/tags/")) {
 620                 int r;
 621                 r = s_update_ref("updating tag", ref, 0);
 622                 format_display(display, r ? '!' : 't', _("[tag update]"),
 623                                r ? _("unable to update local ref") : NULL,
 624                                remote, pretty_ref);
 625                 return r;
 626         }
 627
 628         current = lookup_commit_reference_gently(ref->old_oid.hash, 1);
 629         updated = lookup_commit_reference_gently(ref->new_oid.hash, 1);
 630         if (!current || !updated) {
 631                 const char *msg;
 632                 const char *what;
 633                 int r;
 634                 /*
 635                  * Nicely describe the new ref we're fetching.
 636                  * Base this on the remote's ref name, as it's
 637                  * more likely to follow a standard layout.
 638                  */
 639                 const char *name = remote_ref ? remote_ref->name : "";
 640                 if (starts_with(name, "refs/tags/")) {
 641                         msg = "storing tag";
 642                         what = _("[new tag]");
 643                 } else if (starts_with(name, "refs/heads/")) {
 644                         msg = "storing head";
 645                         what = _("[new branch]");
 646                 } else {
 647                         msg = "storing ref";
 648                         what = _("[new ref]");
 649                 }
 650
 651                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 652                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 653                         check_for_new_submodule_commits(ref->new_oid.hash);
 654                 r = s_update_ref(msg, ref, 0);
 655                 format_display(display, r ? '!' : '*', what,
 656                                r ? _("unable to update local ref") : NULL,
 657                                remote, pretty_ref);
 658                 return r;
 659         }
 660
 661         if (in_merge_bases(current, updated)) {
 662                 struct strbuf quickref = STRBUF_INIT;
 663                 int r;
 664                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 665                 strbuf_addstr(&quickref, "..");
 666                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 667                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 668                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 669                         check_for_new_submodule_commits(ref->new_oid.hash);
 670                 r = s_update_ref("fast-forward", ref, 1);
 671                 format_display(display, r ? '!' : ' ', quickref.buf,
 672                                r ? _("unable to update local ref") : NULL,
 673                                remote, pretty_ref);
 674                 strbuf_release(&quickref);
 675                 return r;
 676         } else if (force || ref->force) {
 677                 struct strbuf quickref = STRBUF_INIT;
 678                 int r;
 679                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 680                 strbuf_addstr(&quickref, "...");
 681                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 682                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 683                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 684                         check_for_new_submodule_commits(ref->new_oid.hash);
 685                 r = s_update_ref("forced-update", ref, 1);
 686                 format_display(display, r ? '!' : '+', quickref.buf,
 687                                r ? _("unable to update local ref") : _("forced update"),
 688                                remote, pretty_ref);
 689                 strbuf_release(&quickref);
 690                 return r;
 691         } else {
 692                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 693                                remote, pretty_ref);
 694                 return 1;
 695         }
 696 }
 697
 698 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
 699 {
 700         struct ref **rm = cb_data;
 701         struct ref *ref = *rm;
 702
 703         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 704                 ref = ref->next;
 705         if (!ref)
 706                 return -1; /* end of the list */
 707         *rm = ref->next;
 708         hashcpy(sha1, ref->old_oid.hash);
 709         return 0;
 710 }
 711
 712 static int store_updated_refs(const char *raw_url, const char *remote_name,
 713                 struct ref *ref_map)
 714 {
 715         FILE *fp;
 716         struct commit *commit;
 717         int url_len, i, rc = 0;
 718         struct strbuf note = STRBUF_INIT;
 719         const char *what, *kind;
 720         struct ref *rm;
 721         char *url;
 722         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 723         int want_status;
 724
 725         fp = fopen(filename, "a");
 726         if (!fp)
 727                 return error_errno(_("cannot open %s"), filename);
 728
 729         if (raw_url)
 730                 url = transport_anonymize_url(raw_url);
 731         else
 732                 url = xstrdup("foreign");
 733
 734         rm = ref_map;
 735         if (check_connected(iterate_ref_map, &rm, NULL)) {
 736                 rc = error(_("%s did not send all necessary objects\n"), url);
 737                 goto abort;
 738         }
 739
 740         prepare_format_display(ref_map);
 741
 742         /*
 743          * We do a pass for each fetch_head_status type in their enum order, so
 744          * merged entries are written before not-for-merge. That lets readers
 745          * use FETCH_HEAD as a refname to refer to the ref to be merged.
 746          */
 747         for (want_status = FETCH_HEAD_MERGE;
 748              want_status <= FETCH_HEAD_IGNORE;
 749              want_status++) {
 750                 for (rm = ref_map; rm; rm = rm->next) {
 751                         struct ref *ref = NULL;
 752                         const char *merge_status_marker = "";
 753
 754                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 755                                 if (want_status == FETCH_HEAD_MERGE)
 756                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
 757                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
 758                                 continue;
 759                         }
 760
 761                         commit = lookup_commit_reference_gently(rm->old_oid.hash, 1);
 762                         if (!commit)
 763                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 764
 765                         if (rm->fetch_head_status != want_status)
 766                                 continue;
 767
 768                         if (rm->peer_ref) {
 769                                 ref = alloc_ref(rm->peer_ref->name);
 770                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 771                                 oidcpy(&ref->new_oid, &rm->old_oid);
 772                                 ref->force = rm->peer_ref->force;
 773                         }
 774
 775
 776                         if (!strcmp(rm->name, "HEAD")) {
 777                                 kind = "";
 778                                 what = "";
 779                         }
 780                         else if (starts_with(rm->name, "refs/heads/")) {
 781                                 kind = "branch";
 782                                 what = rm->name + 11;
 783                         }
 784                         else if (starts_with(rm->name, "refs/tags/")) {
 785                                 kind = "tag";
 786                                 what = rm->name + 10;
 787                         }
 788                         else if (starts_with(rm->name, "refs/remotes/")) {
 789                                 kind = "remote-tracking branch";
 790                                 what = rm->name + 13;
 791                         }
 792                         else {
 793                                 kind = "";
 794                                 what = rm->name;
 795                         }
 796
 797                         url_len = strlen(url);
 798                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 799                                 ;
 800                         url_len = i + 1;
 801                         if (4 < i && !strncmp(".git", url + i - 3, 4))
 802                                 url_len = i - 3;
 803
 804                         strbuf_reset(&note);
 805                         if (*what) {
 806                                 if (*kind)
 807                                         strbuf_addf(&note, "%s ", kind);
 808                                 strbuf_addf(&note, "'%s' of ", what);
 809                         }
 810                         switch (rm->fetch_head_status) {
 811                         case FETCH_HEAD_NOT_FOR_MERGE:
 812                                 merge_status_marker = "not-for-merge";
 813                                 /* fall-through */
 814                         case FETCH_HEAD_MERGE:
 815                                 fprintf(fp, "%s\t%s\t%s",
 816                                         oid_to_hex(&rm->old_oid),
 817                                         merge_status_marker,
 818                                         note.buf);
 819                                 for (i = 0; i < url_len; ++i)
 820                                         if ('\n' == url[i])
 821                                                 fputs("\\n", fp);
 822                                         else
 823                                                 fputc(url[i], fp);
 824                                 fputc('\n', fp);
 825                                 break;
 826                         default:
 827                                 /* do not write anything to FETCH_HEAD */
 828                                 break;
 829                         }
 830
 831                         strbuf_reset(&note);
 832                         if (ref) {
 833                                 rc |= update_local_ref(ref, what, rm, &note);
 834                                 free(ref);
 835                         } else
 836                                 format_display(&note, '*',
 837                                                *kind ? kind : "branch", NULL,
 838                                                *what ? what : "HEAD",
 839                                                "FETCH_HEAD");
 840                         if (note.len) {
 841                                 if (verbosity >= 0 && !shown_url) {
 842                                         fprintf(stderr, _("From %.*s\n"),
 843                                                         url_len, url);
 844                                         shown_url = 1;
 845                                 }
 846                                 if (verbosity >= 0)
 847                                         fprintf(stderr, " %s\n", note.buf);
 848                         }
 849                 }
 850         }
 851
 852         if (rc & STORE_REF_ERROR_DF_CONFLICT)
 853                 error(_("some local refs could not be updated; try running\n"
 854                       " 'git remote prune %s' to remove any old, conflicting "
 855                       "branches"), remote_name);
 856
 857  abort:
 858         strbuf_release(&note);
 859         free(url);
 860         fclose(fp);
 861         return rc;
 862 }
 863
 864 /*
 865  * We would want to bypass the object transfer altogether if
 866  * everything we are going to fetch already exists and is connected
 867  * locally.
 868  */
 869 static int quickfetch(struct ref *ref_map)
 870 {
 871         struct ref *rm = ref_map;
 872         struct check_connected_options opt = CHECK_CONNECTED_INIT;
 873
 874         /*
 875          * If we are deepening a shallow clone we already have these
 876          * objects reachable.  Running rev-list here will return with
 877          * a good (0) exit status and we'll bypass the fetch that we
 878          * really need to perform.  Claiming failure now will ensure
 879          * we perform the network exchange to deepen our history.
 880          */
 881         if (depth)
 882                 return -1;
 883         opt.quiet = 1;
 884         return check_connected(iterate_ref_map, &rm, &opt);
 885 }
 886
 887 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 888 {
 889         int ret = quickfetch(ref_map);
 890         if (ret)
 891                 ret = transport_fetch_refs(transport, ref_map);
 892         if (!ret)
 893                 ret |= store_updated_refs(transport->url,
 894                                 transport->remote->name,
 895                                 ref_map);
 896         transport_unlock_pack(transport);
 897         return ret;
 898 }
 899
 900 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 901                 const char *raw_url)
 902 {
 903         int url_len, i, result = 0;
 904         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 905         char *url;
 906         const char *dangling_msg = dry_run
 907                 ? _("   (%s will become dangling)")
 908                 : _("   (%s has become dangling)");
 909
 910         if (raw_url)
 911                 url = transport_anonymize_url(raw_url);
 912         else
 913                 url = xstrdup("foreign");
 914
 915         url_len = strlen(url);
 916         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 917                 ;
 918
 919         url_len = i + 1;
 920         if (4 < i && !strncmp(".git", url + i - 3, 4))
 921                 url_len = i - 3;
 922
 923         if (!dry_run) {
 924                 struct string_list refnames = STRING_LIST_INIT_NODUP;
 925
 926                 for (ref = stale_refs; ref; ref = ref->next)
 927                         string_list_append(&refnames, ref->name);
 928
 929                 result = delete_refs(&refnames, 0);
 930                 string_list_clear(&refnames, 0);
 931         }
 932
 933         if (verbosity >= 0) {
 934                 for (ref = stale_refs; ref; ref = ref->next) {
 935                         struct strbuf sb = STRBUF_INIT;
 936                         if (!shown_url) {
 937                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
 938                                 shown_url = 1;
 939                         }
 940                         format_display(&sb, '-', _("[deleted]"), NULL,
 941                                        _("(none)"), prettify_refname(ref->name));
 942                         fprintf(stderr, " %s\n",sb.buf);
 943                         strbuf_release(&sb);
 944                         warn_dangling_symref(stderr, dangling_msg, ref->name);
 945                 }
 946         }
 947
 948         free(url);
 949         free_refs(stale_refs);
 950         return result;
 951 }
 952
 953 static void check_not_current_branch(struct ref *ref_map)
 954 {
 955         struct branch *current_branch = branch_get(NULL);
 956
 957         if (is_bare_repository() || !current_branch)
 958                 return;
 959
 960         for (; ref_map; ref_map = ref_map->next)
 961                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
 962                                         ref_map->peer_ref->name))
 963                         die(_("Refusing to fetch into current branch %s "
 964                             "of non-bare repository"), current_branch->refname);
 965 }
 966
 967 static int truncate_fetch_head(void)
 968 {
 969         const char *filename = git_path_fetch_head();
 970         FILE *fp = fopen_for_writing(filename);
 971
 972         if (!fp)
 973                 return error_errno(_("cannot open %s"), filename);
 974         fclose(fp);
 975         return 0;
 976 }
 977
 978 static void set_option(struct transport *transport, const char *name, const char *value)
 979 {
 980         int r = transport_set_option(transport, name, value);
 981         if (r < 0)
 982                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
 983                     name, value, transport->url);
 984         if (r > 0)
 985                 warning(_("Option \"%s\" is ignored for %s\n"),
 986                         name, transport->url);
 987 }
 988
 989 static struct transport *prepare_transport(struct remote *remote)
 990 {
 991         struct transport *transport;
 992         transport = transport_get(remote, NULL);
 993         transport_set_verbosity(transport, verbosity, progress);
 994         transport->family = family;
 995         if (upload_pack)
 996                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
 997         if (keep)
 998                 set_option(transport, TRANS_OPT_KEEP, "yes");
 999         if (depth)
1000                 set_option(transport, TRANS_OPT_DEPTH, depth);
1001         if (update_shallow)
1002                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1003         return transport;
1004 }
1005
1006 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1007 {
1008         if (transport->cannot_reuse) {
1009                 gsecondary = prepare_transport(transport->remote);
1010                 transport = gsecondary;
1011         }
1012
1013         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1014         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1015         fetch_refs(transport, ref_map);
1016
1017         if (gsecondary) {
1018                 transport_disconnect(gsecondary);
1019                 gsecondary = NULL;
1020         }
1021 }
1022
1023 static int do_fetch(struct transport *transport,
1024                     struct refspec *refs, int ref_count)
1025 {
1026         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1027         struct ref *ref_map;
1028         struct ref *rm;
1029         int autotags = (transport->remote->fetch_tags == 1);
1030         int retcode = 0;
1031
1032         for_each_ref(add_existing, &existing_refs);
1033
1034         if (tags == TAGS_DEFAULT) {
1035                 if (transport->remote->fetch_tags == 2)
1036                         tags = TAGS_SET;
1037                 if (transport->remote->fetch_tags == -1)
1038                         tags = TAGS_UNSET;
1039         }
1040
1041         if (!transport->get_refs_list || !transport->fetch)
1042                 die(_("Don't know how to fetch from %s"), transport->url);
1043
1044         /* if not appending, truncate FETCH_HEAD */
1045         if (!append && !dry_run) {
1046                 retcode = truncate_fetch_head();
1047                 if (retcode)
1048                         goto cleanup;
1049         }
1050
1051         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1052         if (!update_head_ok)
1053                 check_not_current_branch(ref_map);
1054
1055         for (rm = ref_map; rm; rm = rm->next) {
1056                 if (rm->peer_ref) {
1057                         struct string_list_item *peer_item =
1058                                 string_list_lookup(&existing_refs,
1059                                                    rm->peer_ref->name);
1060                         if (peer_item) {
1061                                 struct object_id *old_oid = peer_item->util;
1062                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1063                         }
1064                 }
1065         }
1066
1067         if (tags == TAGS_DEFAULT && autotags)
1068                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1069         if (prune) {
1070                 /*
1071                  * We only prune based on refspecs specified
1072                  * explicitly (via command line or configuration); we
1073                  * don't care whether --tags was specified.
1074                  */
1075                 if (ref_count) {
1076                         prune_refs(refs, ref_count, ref_map, transport->url);
1077                 } else {
1078                         prune_refs(transport->remote->fetch,
1079                                    transport->remote->fetch_refspec_nr,
1080                                    ref_map,
1081                                    transport->url);
1082                 }
1083         }
1084         if (fetch_refs(transport, ref_map)) {
1085                 free_refs(ref_map);
1086                 retcode = 1;
1087                 goto cleanup;
1088         }
1089         free_refs(ref_map);
1090
1091         /* if neither --no-tags nor --tags was specified, do automated tag
1092          * following ... */
1093         if (tags == TAGS_DEFAULT && autotags) {
1094                 struct ref **tail = &ref_map;
1095                 ref_map = NULL;
1096                 find_non_local_tags(transport, &ref_map, &tail);
1097                 if (ref_map)
1098                         backfill_tags(transport, ref_map);
1099                 free_refs(ref_map);
1100         }
1101
1102  cleanup:
1103         string_list_clear(&existing_refs, 1);
1104         return retcode;
1105 }
1106
1107 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1108 {
1109         struct string_list *list = priv;
1110         if (!remote->skip_default_update)
1111                 string_list_append(list, remote->name);
1112         return 0;
1113 }
1114
1115 struct remote_group_data {
1116         const char *name;
1117         struct string_list *list;
1118 };
1119
1120 static int get_remote_group(const char *key, const char *value, void *priv)
1121 {
1122         struct remote_group_data *g = priv;
1123
1124         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1125                 /* split list by white space */
1126                 while (*value) {
1127                         size_t wordlen = strcspn(value, " \t\n");
1128
1129                         if (wordlen >= 1)
1130                                 string_list_append_nodup(g->list,
1131                                                    xstrndup(value, wordlen));
1132                         value += wordlen + (value[wordlen] != '\0');
1133                 }
1134         }
1135
1136         return 0;
1137 }
1138
1139 static int add_remote_or_group(const char *name, struct string_list *list)
1140 {
1141         int prev_nr = list->nr;
1142         struct remote_group_data g;
1143         g.name = name; g.list = list;
1144
1145         git_config(get_remote_group, &g);
1146         if (list->nr == prev_nr) {
1147                 struct remote *remote = remote_get(name);
1148                 if (!remote_is_configured(remote))
1149                         return 0;
1150                 string_list_append(list, remote->name);
1151         }
1152         return 1;
1153 }
1154
1155 static void add_options_to_argv(struct argv_array *argv)
1156 {
1157         if (dry_run)
1158                 argv_array_push(argv, "--dry-run");
1159         if (prune != -1)
1160                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1161         if (update_head_ok)
1162                 argv_array_push(argv, "--update-head-ok");
1163         if (force)
1164                 argv_array_push(argv, "--force");
1165         if (keep)
1166                 argv_array_push(argv, "--keep");
1167         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1168                 argv_array_push(argv, "--recurse-submodules");
1169         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1170                 argv_array_push(argv, "--recurse-submodules=on-demand");
1171         if (tags == TAGS_SET)
1172                 argv_array_push(argv, "--tags");
1173         else if (tags == TAGS_UNSET)
1174                 argv_array_push(argv, "--no-tags");
1175         if (verbosity >= 2)
1176                 argv_array_push(argv, "-v");
1177         if (verbosity >= 1)
1178                 argv_array_push(argv, "-v");
1179         else if (verbosity < 0)
1180                 argv_array_push(argv, "-q");
1181
1182 }
1183
1184 static int fetch_multiple(struct string_list *list)
1185 {
1186         int i, result = 0;
1187         struct argv_array argv = ARGV_ARRAY_INIT;
1188
1189         if (!append && !dry_run) {
1190                 int errcode = truncate_fetch_head();
1191                 if (errcode)
1192                         return errcode;
1193         }
1194
1195         argv_array_pushl(&argv, "fetch", "--append", NULL);
1196         add_options_to_argv(&argv);
1197
1198         for (i = 0; i < list->nr; i++) {
1199                 const char *name = list->items[i].string;
1200                 argv_array_push(&argv, name);
1201                 if (verbosity >= 0)
1202                         printf(_("Fetching %s\n"), name);
1203                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1204                         error(_("Could not fetch %s"), name);
1205                         result = 1;
1206                 }
1207                 argv_array_pop(&argv);
1208         }
1209
1210         argv_array_clear(&argv);
1211         return result;
1212 }
1213
1214 static int fetch_one(struct remote *remote, int argc, const char **argv)
1215 {
1216         static const char **refs = NULL;
1217         struct refspec *refspec;
1218         int ref_nr = 0;
1219         int exit_code;
1220
1221         if (!remote)
1222                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1223                     "remote name from which new revisions should be fetched."));
1224
1225         gtransport = prepare_transport(remote);
1226
1227         if (prune < 0) {
1228                 /* no command line request */
1229                 if (0 <= gtransport->remote->prune)
1230                         prune = gtransport->remote->prune;
1231                 else if (0 <= fetch_prune_config)
1232                         prune = fetch_prune_config;
1233                 else
1234                         prune = PRUNE_BY_DEFAULT;
1235         }
1236
1237         if (argc > 0) {
1238                 int j = 0;
1239                 int i;
1240                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1241                 for (i = 0; i < argc; i++) {
1242                         if (!strcmp(argv[i], "tag")) {
1243                                 i++;
1244                                 if (i >= argc)
1245                                         die(_("You need to specify a tag name."));
1246                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1247                                                     argv[i], argv[i]);
1248                         } else
1249                                 refs[j++] = argv[i];
1250                 }
1251                 refs[j] = NULL;
1252                 ref_nr = j;
1253         }
1254
1255         sigchain_push_common(unlock_pack_on_signal);
1256         atexit(unlock_pack);
1257         refspec = parse_fetch_refspec(ref_nr, refs);
1258         exit_code = do_fetch(gtransport, refspec, ref_nr);
1259         free_refspec(ref_nr, refspec);
1260         transport_disconnect(gtransport);
1261         gtransport = NULL;
1262         return exit_code;
1263 }
1264
1265 int cmd_fetch(int argc, const char **argv, const char *prefix)
1266 {
1267         int i;
1268         struct string_list list = STRING_LIST_INIT_DUP;
1269         struct remote *remote;
1270         int result = 0;
1271         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1272
1273         packet_trace_identity("fetch");
1274
1275         /* Record the command line for the reflog */
1276         strbuf_addstr(&default_rla, "fetch");
1277         for (i = 1; i < argc; i++)
1278                 strbuf_addf(&default_rla, " %s", argv[i]);
1279
1280         git_config(git_fetch_config, NULL);
1281
1282         argc = parse_options(argc, argv, prefix,
1283                              builtin_fetch_options, builtin_fetch_usage, 0);
1284
1285         if (unshallow) {
1286                 if (depth)
1287                         die(_("--depth and --unshallow cannot be used together"));
1288                 else if (!is_repository_shallow())
1289                         die(_("--unshallow on a complete repository does not make sense"));
1290                 else
1291                         depth = xstrfmt("%d", INFINITE_DEPTH);
1292         }
1293
1294         /* no need to be strict, transport_set_option() will validate it again */
1295         if (depth && atoi(depth) < 1)
1296                 die(_("depth %s is not a positive number"), depth);
1297
1298         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1299                 if (recurse_submodules_default) {
1300                         int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1301                         set_config_fetch_recurse_submodules(arg);
1302                 }
1303                 gitmodules_config();
1304                 git_config(submodule_config, NULL);
1305         }
1306
1307         if (all) {
1308                 if (argc == 1)
1309                         die(_("fetch --all does not take a repository argument"));
1310                 else if (argc > 1)
1311                         die(_("fetch --all does not make sense with refspecs"));
1312                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1313                 result = fetch_multiple(&list);
1314         } else if (argc == 0) {
1315                 /* No arguments -- use default remote */
1316                 remote = remote_get(NULL);
1317                 result = fetch_one(remote, argc, argv);
1318         } else if (multiple) {
1319                 /* All arguments are assumed to be remotes or groups */
1320                 for (i = 0; i < argc; i++)
1321                         if (!add_remote_or_group(argv[i], &list))
1322                                 die(_("No such remote or remote group: %s"), argv[i]);
1323                 result = fetch_multiple(&list);
1324         } else {
1325                 /* Single remote or group */
1326                 (void) add_remote_or_group(argv[0], &list);
1327                 if (list.nr > 1) {
1328                         /* More than one remote */
1329                         if (argc > 1)
1330                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1331                         result = fetch_multiple(&list);
1332                 } else {
1333                         /* Zero or one remotes */
1334                         remote = remote_get(argv[0]);
1335                         result = fetch_one(remote, argc-1, argv+1);
1336                 }
1337         }
1338
1339         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1340                 struct argv_array options = ARGV_ARRAY_INIT;
1341
1342                 add_options_to_argv(&options);
1343                 result = fetch_populated_submodules(&options,
1344                                                     submodule_prefix,
1345                                                     recurse_submodules,
1346                                                     verbosity < 0,
1347                                                     max_children);
1348                 argv_array_clear(&options);
1349         }
1350
1351         string_list_clear(&list, 0);
1352
1353         close_all_packs();
1354
1355         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1356         if (verbosity < 0)
1357                 argv_array_push(&argv_gc_auto, "--quiet");
1358         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1359         argv_array_clear(&argv_gc_auto);
1360
1361         return result;
1362 }