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, deepen_relative;
  39 static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  40 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  41 static int max_children = -1;
  42 static enum transport_family family;
  43 static const char *depth;
  44 static const char *deepen_since;
  45 static const char *upload_pack;
  46 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
  47 static struct strbuf default_rla = STRBUF_INIT;
  48 static struct transport *gtransport;
  49 static struct transport *gsecondary;
  50 static const char *submodule_prefix = "";
  51 static const char *recurse_submodules_default;
  52 static int shown_url = 0;
  53 static int refmap_alloc, refmap_nr;
  54 static const char **refmap_array;
  55
  56 static int option_parse_recurse_submodules(const struct option *opt,
  57                                    const char *arg, int unset)
  58 {
  59         if (unset) {
  60                 recurse_submodules = RECURSE_SUBMODULES_OFF;
  61         } else {
  62                 if (arg)
  63                         recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
  64                 else
  65                         recurse_submodules = RECURSE_SUBMODULES_ON;
  66         }
  67         return 0;
  68 }
  69
  70 static int git_fetch_config(const char *k, const char *v, void *cb)
  71 {
  72         if (!strcmp(k, "fetch.prune")) {
  73                 fetch_prune_config = git_config_bool(k, v);
  74                 return 0;
  75         }
  76
  77         if (!strcmp(k, "submodule.recurse")) {
  78                 int r = git_config_bool(k, v) ?
  79                         RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
  80                 recurse_submodules = r;
  81         }
  82
  83         return git_default_config(k, v, cb);
  84 }
  85
  86 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
  87 {
  88         ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
  89
  90         /*
  91          * "git fetch --refmap='' origin foo"
  92          * can be used to tell the command not to store anywhere
  93          */
  94         if (*arg)
  95                 refmap_array[refmap_nr++] = arg;
  96         return 0;
  97 }
  98
  99 static struct option builtin_fetch_options[] = {
 100         OPT__VERBOSITY(&verbosity),
 101         OPT_BOOL(0, "all", &all,
 102                  N_("fetch from all remotes")),
 103         OPT_BOOL('a', "append", &append,
 104                  N_("append to .git/FETCH_HEAD instead of overwriting")),
 105         OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 106                    N_("path to upload pack on remote end")),
 107         OPT__FORCE(&force, N_("force overwrite of local branch")),
 108         OPT_BOOL('m', "multiple", &multiple,
 109                  N_("fetch from multiple remotes")),
 110         OPT_SET_INT('t', "tags", &tags,
 111                     N_("fetch all tags and associated objects"), TAGS_SET),
 112         OPT_SET_INT('n', NULL, &tags,
 113                     N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 114         OPT_INTEGER('j', "jobs", &max_children,
 115                     N_("number of submodules fetched in parallel")),
 116         OPT_BOOL('p', "prune", &prune,
 117                  N_("prune remote-tracking branches no longer on remote")),
 118         { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
 119                     N_("control recursive fetching of submodules"),
 120                     PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 121         OPT_BOOL(0, "dry-run", &dry_run,
 122                  N_("dry run")),
 123         OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 124         OPT_BOOL('u', "update-head-ok", &update_head_ok,
 125                     N_("allow updating of HEAD ref")),
 126         OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 127         OPT_STRING(0, "depth", &depth, N_("depth"),
 128                    N_("deepen history of shallow clone")),
 129         OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
 130                    N_("deepen history of shallow repository based on time")),
 131         OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
 132                         N_("deepen history of shallow clone, excluding rev")),
 133         OPT_INTEGER(0, "deepen", &deepen_relative,
 134                     N_("deepen history of shallow clone")),
 135         { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
 136                    N_("convert to a complete repository"),
 137                    PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
 138         { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 139                    N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 140         { OPTION_STRING, 0, "recurse-submodules-default",
 141                    &recurse_submodules_default, NULL,
 142                    N_("default mode for recursion"), PARSE_OPT_HIDDEN },
 143         OPT_BOOL(0, "update-shallow", &update_shallow,
 144                  N_("accept refs that update .git/shallow")),
 145         { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
 146           N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
 147         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 148                         TRANSPORT_FAMILY_IPV4),
 149         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 150                         TRANSPORT_FAMILY_IPV6),
 151         OPT_END()
 152 };
 153
 154 static void unlock_pack(void)
 155 {
 156         if (gtransport)
 157                 transport_unlock_pack(gtransport);
 158         if (gsecondary)
 159                 transport_unlock_pack(gsecondary);
 160 }
 161
 162 static void unlock_pack_on_signal(int signo)
 163 {
 164         unlock_pack();
 165         sigchain_pop(signo);
 166         raise(signo);
 167 }
 168
 169 static void add_merge_config(struct ref **head,
 170                            const struct ref *remote_refs,
 171                            struct branch *branch,
 172                            struct ref ***tail)
 173 {
 174         int i;
 175
 176         for (i = 0; i < branch->merge_nr; i++) {
 177                 struct ref *rm, **old_tail = *tail;
 178                 struct refspec refspec;
 179
 180                 for (rm = *head; rm; rm = rm->next) {
 181                         if (branch_merge_matches(branch, i, rm->name)) {
 182                                 rm->fetch_head_status = FETCH_HEAD_MERGE;
 183                                 break;
 184                         }
 185                 }
 186                 if (rm)
 187                         continue;
 188
 189                 /*
 190                  * Not fetched to a remote-tracking branch?  We need to fetch
 191                  * it anyway to allow this branch's "branch.$name.merge"
 192                  * to be honored by 'git pull', but we do not have to
 193                  * fail if branch.$name.merge is misconfigured to point
 194                  * at a nonexisting branch.  If we were indeed called by
 195                  * 'git pull', it will notice the misconfiguration because
 196                  * there is no entry in the resulting FETCH_HEAD marked
 197                  * for merging.
 198                  */
 199                 memset(&refspec, 0, sizeof(refspec));
 200                 refspec.src = branch->merge[i]->src;
 201                 get_fetch_map(remote_refs, &refspec, tail, 1);
 202                 for (rm = *old_tail; rm; rm = rm->next)
 203                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 204         }
 205 }
 206
 207 static int add_existing(const char *refname, const struct object_id *oid,
 208                         int flag, void *cbdata)
 209 {
 210         struct string_list *list = (struct string_list *)cbdata;
 211         struct string_list_item *item = string_list_insert(list, refname);
 212         struct object_id *old_oid = xmalloc(sizeof(*old_oid));
 213
 214         oidcpy(old_oid, oid);
 215         item->util = old_oid;
 216         return 0;
 217 }
 218
 219 static int will_fetch(struct ref **head, const unsigned char *sha1)
 220 {
 221         struct ref *rm = *head;
 222         while (rm) {
 223                 if (!hashcmp(rm->old_oid.hash, sha1))
 224                         return 1;
 225                 rm = rm->next;
 226         }
 227         return 0;
 228 }
 229
 230 static void find_non_local_tags(struct transport *transport,
 231                         struct ref **head,
 232                         struct ref ***tail)
 233 {
 234         struct string_list existing_refs = STRING_LIST_INIT_DUP;
 235         struct string_list remote_refs = STRING_LIST_INIT_NODUP;
 236         const struct ref *ref;
 237         struct string_list_item *item = NULL;
 238
 239         for_each_ref(add_existing, &existing_refs);
 240         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 241                 if (!starts_with(ref->name, "refs/tags/"))
 242                         continue;
 243
 244                 /*
 245                  * The peeled ref always follows the matching base
 246                  * ref, so if we see a peeled ref that we don't want
 247                  * to fetch then we can mark the ref entry in the list
 248                  * as one to ignore by setting util to NULL.
 249                  */
 250                 if (ends_with(ref->name, "^{}")) {
 251                         if (item &&
 252                             !has_object_file_with_flags(&ref->old_oid, HAS_SHA1_QUICK) &&
 253                             !will_fetch(head, ref->old_oid.hash) &&
 254                             !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
 255                             !will_fetch(head, item->util))
 256                                 item->util = NULL;
 257                         item = NULL;
 258                         continue;
 259                 }
 260
 261                 /*
 262                  * If item is non-NULL here, then we previously saw a
 263                  * ref not followed by a peeled reference, so we need
 264                  * to check if it is a lightweight tag that we want to
 265                  * fetch.
 266                  */
 267                 if (item &&
 268                     !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
 269                     !will_fetch(head, item->util))
 270                         item->util = NULL;
 271
 272                 item = NULL;
 273
 274                 /* skip duplicates and refs that we already have */
 275                 if (string_list_has_string(&remote_refs, ref->name) ||
 276                     string_list_has_string(&existing_refs, ref->name))
 277                         continue;
 278
 279                 item = string_list_insert(&remote_refs, ref->name);
 280                 item->util = (void *)&ref->old_oid;
 281         }
 282         string_list_clear(&existing_refs, 1);
 283
 284         /*
 285          * We may have a final lightweight tag that needs to be
 286          * checked to see if it needs fetching.
 287          */
 288         if (item &&
 289             !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
 290             !will_fetch(head, item->util))
 291                 item->util = NULL;
 292
 293         /*
 294          * For all the tags in the remote_refs string list,
 295          * add them to the list of refs to be fetched
 296          */
 297         for_each_string_list_item(item, &remote_refs) {
 298                 /* Unless we have already decided to ignore this item... */
 299                 if (item->util)
 300                 {
 301                         struct ref *rm = alloc_ref(item->string);
 302                         rm->peer_ref = alloc_ref(item->string);
 303                         oidcpy(&rm->old_oid, item->util);
 304                         **tail = rm;
 305                         *tail = &rm->next;
 306                 }
 307         }
 308
 309         string_list_clear(&remote_refs, 0);
 310 }
 311
 312 static struct ref *get_ref_map(struct transport *transport,
 313                                struct refspec *refspecs, int refspec_count,
 314                                int tags, int *autotags)
 315 {
 316         int i;
 317         struct ref *rm;
 318         struct ref *ref_map = NULL;
 319         struct ref **tail = &ref_map;
 320
 321         /* opportunistically-updated references: */
 322         struct ref *orefs = NULL, **oref_tail = &orefs;
 323
 324         const struct ref *remote_refs = transport_get_remote_refs(transport);
 325
 326         if (refspec_count) {
 327                 struct refspec *fetch_refspec;
 328                 int fetch_refspec_nr;
 329
 330                 for (i = 0; i < refspec_count; i++) {
 331                         get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
 332                         if (refspecs[i].dst && refspecs[i].dst[0])
 333                                 *autotags = 1;
 334                 }
 335                 /* Merge everything on the command line (but not --tags) */
 336                 for (rm = ref_map; rm; rm = rm->next)
 337                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 338
 339                 /*
 340                  * For any refs that we happen to be fetching via
 341                  * command-line arguments, the destination ref might
 342                  * have been missing or have been different than the
 343                  * remote-tracking ref that would be derived from the
 344                  * configured refspec.  In these cases, we want to
 345                  * take the opportunity to update their configured
 346                  * remote-tracking reference.  However, we do not want
 347                  * to mention these entries in FETCH_HEAD at all, as
 348                  * they would simply be duplicates of existing
 349                  * entries, so we set them FETCH_HEAD_IGNORE below.
 350                  *
 351                  * We compute these entries now, based only on the
 352                  * refspecs specified on the command line.  But we add
 353                  * them to the list following the refspecs resulting
 354                  * from the tags option so that one of the latter,
 355                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 356                  * by ref_remove_duplicates() in favor of one of these
 357                  * opportunistic entries with FETCH_HEAD_IGNORE.
 358                  */
 359                 if (refmap_array) {
 360                         fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
 361                         fetch_refspec_nr = refmap_nr;
 362                 } else {
 363                         fetch_refspec = transport->remote->fetch;
 364                         fetch_refspec_nr = transport->remote->fetch_refspec_nr;
 365                 }
 366
 367                 for (i = 0; i < fetch_refspec_nr; i++)
 368                         get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
 369         } else if (refmap_array) {
 370                 die("--refmap option is only meaningful with command-line refspec(s).");
 371         } else {
 372                 /* Use the defaults */
 373                 struct remote *remote = transport->remote;
 374                 struct branch *branch = branch_get(NULL);
 375                 int has_merge = branch_has_merge_config(branch);
 376                 if (remote &&
 377                     (remote->fetch_refspec_nr ||
 378                      /* Note: has_merge implies non-NULL branch->remote_name */
 379                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 380                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 381                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 382                                 if (remote->fetch[i].dst &&
 383                                     remote->fetch[i].dst[0])
 384                                         *autotags = 1;
 385                                 if (!i && !has_merge && ref_map &&
 386                                     !remote->fetch[0].pattern)
 387                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 388                         }
 389                         /*
 390                          * if the remote we're fetching from is the same
 391                          * as given in branch.<name>.remote, we add the
 392                          * ref given in branch.<name>.merge, too.
 393                          *
 394                          * Note: has_merge implies non-NULL branch->remote_name
 395                          */
 396                         if (has_merge &&
 397                             !strcmp(branch->remote_name, remote->name))
 398                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 399                 } else {
 400                         ref_map = get_remote_ref(remote_refs, "HEAD");
 401                         if (!ref_map)
 402                                 die(_("Couldn't find remote ref HEAD"));
 403                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 404                         tail = &ref_map->next;
 405                 }
 406         }
 407
 408         if (tags == TAGS_SET)
 409                 /* also fetch all tags */
 410                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 411         else if (tags == TAGS_DEFAULT && *autotags)
 412                 find_non_local_tags(transport, &ref_map, &tail);
 413
 414         /* Now append any refs to be updated opportunistically: */
 415         *tail = orefs;
 416         for (rm = orefs; rm; rm = rm->next) {
 417                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
 418                 tail = &rm->next;
 419         }
 420
 421         return ref_remove_duplicates(ref_map);
 422 }
 423
 424 #define STORE_REF_ERROR_OTHER 1
 425 #define STORE_REF_ERROR_DF_CONFLICT 2
 426
 427 static int s_update_ref(const char *action,
 428                         struct ref *ref,
 429                         int check_old)
 430 {
 431         char *msg;
 432         char *rla = getenv("GIT_REFLOG_ACTION");
 433         struct ref_transaction *transaction;
 434         struct strbuf err = STRBUF_INIT;
 435         int ret, df_conflict = 0;
 436
 437         if (dry_run)
 438                 return 0;
 439         if (!rla)
 440                 rla = default_rla.buf;
 441         msg = xstrfmt("%s: %s", rla, action);
 442
 443         transaction = ref_transaction_begin(&err);
 444         if (!transaction ||
 445             ref_transaction_update(transaction, ref->name,
 446                                    ref->new_oid.hash,
 447                                    check_old ? ref->old_oid.hash : NULL,
 448                                    0, msg, &err))
 449                 goto fail;
 450
 451         ret = ref_transaction_commit(transaction, &err);
 452         if (ret) {
 453                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 454                 goto fail;
 455         }
 456
 457         ref_transaction_free(transaction);
 458         strbuf_release(&err);
 459         free(msg);
 460         return 0;
 461 fail:
 462         ref_transaction_free(transaction);
 463         error("%s", err.buf);
 464         strbuf_release(&err);
 465         free(msg);
 466         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 467                            : STORE_REF_ERROR_OTHER;
 468 }
 469
 470 static int refcol_width = 10;
 471 static int compact_format;
 472
 473 static void adjust_refcol_width(const struct ref *ref)
 474 {
 475         int max, rlen, llen, len;
 476
 477         /* uptodate lines are only shown on high verbosity level */
 478         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 479                 return;
 480
 481         max    = term_columns();
 482         rlen   = utf8_strwidth(prettify_refname(ref->name));
 483
 484         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 485
 486         /*
 487          * rough estimation to see if the output line is too long and
 488          * should not be counted (we can't do precise calculation
 489          * anyway because we don't know if the error explanation part
 490          * will be printed in update_local_ref)
 491          */
 492         if (compact_format) {
 493                 llen = 0;
 494                 max = max * 2 / 3;
 495         }
 496         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 497         if (len >= max)
 498                 return;
 499
 500         /*
 501          * Not precise calculation for compact mode because '*' can
 502          * appear on the left hand side of '->' and shrink the column
 503          * back.
 504          */
 505         if (refcol_width < rlen)
 506                 refcol_width = rlen;
 507 }
 508
 509 static void prepare_format_display(struct ref *ref_map)
 510 {
 511         struct ref *rm;
 512         const char *format = "full";
 513
 514         git_config_get_string_const("fetch.output", &format);
 515         if (!strcasecmp(format, "full"))
 516                 compact_format = 0;
 517         else if (!strcasecmp(format, "compact"))
 518                 compact_format = 1;
 519         else
 520                 die(_("configuration fetch.output contains invalid value %s"),
 521                     format);
 522
 523         for (rm = ref_map; rm; rm = rm->next) {
 524                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 525                     !rm->peer_ref ||
 526                     !strcmp(rm->name, "HEAD"))
 527                         continue;
 528
 529                 adjust_refcol_width(rm);
 530         }
 531 }
 532
 533 static void print_remote_to_local(struct strbuf *display,
 534                                   const char *remote, const char *local)
 535 {
 536         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 537 }
 538
 539 static int find_and_replace(struct strbuf *haystack,
 540                             const char *needle,
 541                             const char *placeholder)
 542 {
 543         const char *p = strstr(haystack->buf, needle);
 544         int plen, nlen;
 545
 546         if (!p)
 547                 return 0;
 548
 549         if (p > haystack->buf && p[-1] != '/')
 550                 return 0;
 551
 552         plen = strlen(p);
 553         nlen = strlen(needle);
 554         if (plen > nlen && p[nlen] != '/')
 555                 return 0;
 556
 557         strbuf_splice(haystack, p - haystack->buf, nlen,
 558                       placeholder, strlen(placeholder));
 559         return 1;
 560 }
 561
 562 static void print_compact(struct strbuf *display,
 563                           const char *remote, const char *local)
 564 {
 565         struct strbuf r = STRBUF_INIT;
 566         struct strbuf l = STRBUF_INIT;
 567
 568         if (!strcmp(remote, local)) {
 569                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 570                 return;
 571         }
 572
 573         strbuf_addstr(&r, remote);
 574         strbuf_addstr(&l, local);
 575
 576         if (!find_and_replace(&r, local, "*"))
 577                 find_and_replace(&l, remote, "*");
 578         print_remote_to_local(display, r.buf, l.buf);
 579
 580         strbuf_release(&r);
 581         strbuf_release(&l);
 582 }
 583
 584 static void format_display(struct strbuf *display, char code,
 585                            const char *summary, const char *error,
 586                            const char *remote, const char *local,
 587                            int summary_width)
 588 {
 589         int width = (summary_width + strlen(summary) - gettext_width(summary));
 590
 591         strbuf_addf(display, "%c %-*s ", code, width, summary);
 592         if (!compact_format)
 593                 print_remote_to_local(display, remote, local);
 594         else
 595                 print_compact(display, remote, local);
 596         if (error)
 597                 strbuf_addf(display, "  (%s)", error);
 598 }
 599
 600 static int update_local_ref(struct ref *ref,
 601                             const char *remote,
 602                             const struct ref *remote_ref,
 603                             struct strbuf *display,
 604                             int summary_width)
 605 {
 606         struct commit *current = NULL, *updated;
 607         enum object_type type;
 608         struct branch *current_branch = branch_get(NULL);
 609         const char *pretty_ref = prettify_refname(ref->name);
 610
 611         type = sha1_object_info(ref->new_oid.hash, NULL);
 612         if (type < 0)
 613                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 614
 615         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 616                 if (verbosity > 0)
 617                         format_display(display, '=', _("[up to date]"), NULL,
 618                                        remote, pretty_ref, summary_width);
 619                 return 0;
 620         }
 621
 622         if (current_branch &&
 623             !strcmp(ref->name, current_branch->name) &&
 624             !(update_head_ok || is_bare_repository()) &&
 625             !is_null_oid(&ref->old_oid)) {
 626                 /*
 627                  * If this is the head, and it's not okay to update
 628                  * the head, and the old value of the head isn't empty...
 629                  */
 630                 format_display(display, '!', _("[rejected]"),
 631                                _("can't fetch in current branch"),
 632                                remote, pretty_ref, summary_width);
 633                 return 1;
 634         }
 635
 636         if (!is_null_oid(&ref->old_oid) &&
 637             starts_with(ref->name, "refs/tags/")) {
 638                 int r;
 639                 r = s_update_ref("updating tag", ref, 0);
 640                 format_display(display, r ? '!' : 't', _("[tag update]"),
 641                                r ? _("unable to update local ref") : NULL,
 642                                remote, pretty_ref, summary_width);
 643                 return r;
 644         }
 645
 646         current = lookup_commit_reference_gently(&ref->old_oid, 1);
 647         updated = lookup_commit_reference_gently(&ref->new_oid, 1);
 648         if (!current || !updated) {
 649                 const char *msg;
 650                 const char *what;
 651                 int r;
 652                 /*
 653                  * Nicely describe the new ref we're fetching.
 654                  * Base this on the remote's ref name, as it's
 655                  * more likely to follow a standard layout.
 656                  */
 657                 const char *name = remote_ref ? remote_ref->name : "";
 658                 if (starts_with(name, "refs/tags/")) {
 659                         msg = "storing tag";
 660                         what = _("[new tag]");
 661                 } else if (starts_with(name, "refs/heads/")) {
 662                         msg = "storing head";
 663                         what = _("[new branch]");
 664                 } else {
 665                         msg = "storing ref";
 666                         what = _("[new ref]");
 667                 }
 668
 669                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 670                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 671                         check_for_new_submodule_commits(&ref->new_oid);
 672                 r = s_update_ref(msg, ref, 0);
 673                 format_display(display, r ? '!' : '*', what,
 674                                r ? _("unable to update local ref") : NULL,
 675                                remote, pretty_ref, summary_width);
 676                 return r;
 677         }
 678
 679         if (in_merge_bases(current, updated)) {
 680                 struct strbuf quickref = STRBUF_INIT;
 681                 int r;
 682                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 683                 strbuf_addstr(&quickref, "..");
 684                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 685                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 686                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 687                         check_for_new_submodule_commits(&ref->new_oid);
 688                 r = s_update_ref("fast-forward", ref, 1);
 689                 format_display(display, r ? '!' : ' ', quickref.buf,
 690                                r ? _("unable to update local ref") : NULL,
 691                                remote, pretty_ref, summary_width);
 692                 strbuf_release(&quickref);
 693                 return r;
 694         } else if (force || ref->force) {
 695                 struct strbuf quickref = STRBUF_INIT;
 696                 int r;
 697                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 698                 strbuf_addstr(&quickref, "...");
 699                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 700                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 701                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 702                         check_for_new_submodule_commits(&ref->new_oid);
 703                 r = s_update_ref("forced-update", ref, 1);
 704                 format_display(display, r ? '!' : '+', quickref.buf,
 705                                r ? _("unable to update local ref") : _("forced update"),
 706                                remote, pretty_ref, summary_width);
 707                 strbuf_release(&quickref);
 708                 return r;
 709         } else {
 710                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 711                                remote, pretty_ref, summary_width);
 712                 return 1;
 713         }
 714 }
 715
 716 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
 717 {
 718         struct ref **rm = cb_data;
 719         struct ref *ref = *rm;
 720
 721         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 722                 ref = ref->next;
 723         if (!ref)
 724                 return -1; /* end of the list */
 725         *rm = ref->next;
 726         hashcpy(sha1, ref->old_oid.hash);
 727         return 0;
 728 }
 729
 730 static int store_updated_refs(const char *raw_url, const char *remote_name,
 731                 struct ref *ref_map)
 732 {
 733         FILE *fp;
 734         struct commit *commit;
 735         int url_len, i, rc = 0;
 736         struct strbuf note = STRBUF_INIT;
 737         const char *what, *kind;
 738         struct ref *rm;
 739         char *url;
 740         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 741         int want_status;
 742         int summary_width = transport_summary_width(ref_map);
 743
 744         fp = fopen(filename, "a");
 745         if (!fp)
 746                 return error_errno(_("cannot open %s"), filename);
 747
 748         if (raw_url)
 749                 url = transport_anonymize_url(raw_url);
 750         else
 751                 url = xstrdup("foreign");
 752
 753         rm = ref_map;
 754         if (check_connected(iterate_ref_map, &rm, NULL)) {
 755                 rc = error(_("%s did not send all necessary objects\n"), url);
 756                 goto abort;
 757         }
 758
 759         prepare_format_display(ref_map);
 760
 761         /*
 762          * We do a pass for each fetch_head_status type in their enum order, so
 763          * merged entries are written before not-for-merge. That lets readers
 764          * use FETCH_HEAD as a refname to refer to the ref to be merged.
 765          */
 766         for (want_status = FETCH_HEAD_MERGE;
 767              want_status <= FETCH_HEAD_IGNORE;
 768              want_status++) {
 769                 for (rm = ref_map; rm; rm = rm->next) {
 770                         struct ref *ref = NULL;
 771                         const char *merge_status_marker = "";
 772
 773                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 774                                 if (want_status == FETCH_HEAD_MERGE)
 775                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
 776                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
 777                                 continue;
 778                         }
 779
 780                         commit = lookup_commit_reference_gently(&rm->old_oid,
 781                                                                 1);
 782                         if (!commit)
 783                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 784
 785                         if (rm->fetch_head_status != want_status)
 786                                 continue;
 787
 788                         if (rm->peer_ref) {
 789                                 ref = alloc_ref(rm->peer_ref->name);
 790                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 791                                 oidcpy(&ref->new_oid, &rm->old_oid);
 792                                 ref->force = rm->peer_ref->force;
 793                         }
 794
 795
 796                         if (!strcmp(rm->name, "HEAD")) {
 797                                 kind = "";
 798                                 what = "";
 799                         }
 800                         else if (starts_with(rm->name, "refs/heads/")) {
 801                                 kind = "branch";
 802                                 what = rm->name + 11;
 803                         }
 804                         else if (starts_with(rm->name, "refs/tags/")) {
 805                                 kind = "tag";
 806                                 what = rm->name + 10;
 807                         }
 808                         else if (starts_with(rm->name, "refs/remotes/")) {
 809                                 kind = "remote-tracking branch";
 810                                 what = rm->name + 13;
 811                         }
 812                         else {
 813                                 kind = "";
 814                                 what = rm->name;
 815                         }
 816
 817                         url_len = strlen(url);
 818                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 819                                 ;
 820                         url_len = i + 1;
 821                         if (4 < i && !strncmp(".git", url + i - 3, 4))
 822                                 url_len = i - 3;
 823
 824                         strbuf_reset(&note);
 825                         if (*what) {
 826                                 if (*kind)
 827                                         strbuf_addf(&note, "%s ", kind);
 828                                 strbuf_addf(&note, "'%s' of ", what);
 829                         }
 830                         switch (rm->fetch_head_status) {
 831                         case FETCH_HEAD_NOT_FOR_MERGE:
 832                                 merge_status_marker = "not-for-merge";
 833                                 /* fall-through */
 834                         case FETCH_HEAD_MERGE:
 835                                 fprintf(fp, "%s\t%s\t%s",
 836                                         oid_to_hex(&rm->old_oid),
 837                                         merge_status_marker,
 838                                         note.buf);
 839                                 for (i = 0; i < url_len; ++i)
 840                                         if ('\n' == url[i])
 841                                                 fputs("\\n", fp);
 842                                         else
 843                                                 fputc(url[i], fp);
 844                                 fputc('\n', fp);
 845                                 break;
 846                         default:
 847                                 /* do not write anything to FETCH_HEAD */
 848                                 break;
 849                         }
 850
 851                         strbuf_reset(&note);
 852                         if (ref) {
 853                                 rc |= update_local_ref(ref, what, rm, &note,
 854                                                        summary_width);
 855                                 free(ref);
 856                         } else
 857                                 format_display(&note, '*',
 858                                                *kind ? kind : "branch", NULL,
 859                                                *what ? what : "HEAD",
 860                                                "FETCH_HEAD", summary_width);
 861                         if (note.len) {
 862                                 if (verbosity >= 0 && !shown_url) {
 863                                         fprintf(stderr, _("From %.*s\n"),
 864                                                         url_len, url);
 865                                         shown_url = 1;
 866                                 }
 867                                 if (verbosity >= 0)
 868                                         fprintf(stderr, " %s\n", note.buf);
 869                         }
 870                 }
 871         }
 872
 873         if (rc & STORE_REF_ERROR_DF_CONFLICT)
 874                 error(_("some local refs could not be updated; try running\n"
 875                       " 'git remote prune %s' to remove any old, conflicting "
 876                       "branches"), remote_name);
 877
 878  abort:
 879         strbuf_release(&note);
 880         free(url);
 881         fclose(fp);
 882         return rc;
 883 }
 884
 885 /*
 886  * We would want to bypass the object transfer altogether if
 887  * everything we are going to fetch already exists and is connected
 888  * locally.
 889  */
 890 static int quickfetch(struct ref *ref_map)
 891 {
 892         struct ref *rm = ref_map;
 893         struct check_connected_options opt = CHECK_CONNECTED_INIT;
 894
 895         /*
 896          * If we are deepening a shallow clone we already have these
 897          * objects reachable.  Running rev-list here will return with
 898          * a good (0) exit status and we'll bypass the fetch that we
 899          * really need to perform.  Claiming failure now will ensure
 900          * we perform the network exchange to deepen our history.
 901          */
 902         if (deepen)
 903                 return -1;
 904         opt.quiet = 1;
 905         return check_connected(iterate_ref_map, &rm, &opt);
 906 }
 907
 908 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 909 {
 910         int ret = quickfetch(ref_map);
 911         if (ret)
 912                 ret = transport_fetch_refs(transport, ref_map);
 913         if (!ret)
 914                 ret |= store_updated_refs(transport->url,
 915                                 transport->remote->name,
 916                                 ref_map);
 917         transport_unlock_pack(transport);
 918         return ret;
 919 }
 920
 921 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 922                 const char *raw_url)
 923 {
 924         int url_len, i, result = 0;
 925         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 926         char *url;
 927         int summary_width = transport_summary_width(stale_refs);
 928         const char *dangling_msg = dry_run
 929                 ? _("   (%s will become dangling)")
 930                 : _("   (%s has become dangling)");
 931
 932         if (raw_url)
 933                 url = transport_anonymize_url(raw_url);
 934         else
 935                 url = xstrdup("foreign");
 936
 937         url_len = strlen(url);
 938         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 939                 ;
 940
 941         url_len = i + 1;
 942         if (4 < i && !strncmp(".git", url + i - 3, 4))
 943                 url_len = i - 3;
 944
 945         if (!dry_run) {
 946                 struct string_list refnames = STRING_LIST_INIT_NODUP;
 947
 948                 for (ref = stale_refs; ref; ref = ref->next)
 949                         string_list_append(&refnames, ref->name);
 950
 951                 result = delete_refs("fetch: prune", &refnames, 0);
 952                 string_list_clear(&refnames, 0);
 953         }
 954
 955         if (verbosity >= 0) {
 956                 for (ref = stale_refs; ref; ref = ref->next) {
 957                         struct strbuf sb = STRBUF_INIT;
 958                         if (!shown_url) {
 959                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
 960                                 shown_url = 1;
 961                         }
 962                         format_display(&sb, '-', _("[deleted]"), NULL,
 963                                        _("(none)"), prettify_refname(ref->name),
 964                                        summary_width);
 965                         fprintf(stderr, " %s\n",sb.buf);
 966                         strbuf_release(&sb);
 967                         warn_dangling_symref(stderr, dangling_msg, ref->name);
 968                 }
 969         }
 970
 971         free(url);
 972         free_refs(stale_refs);
 973         return result;
 974 }
 975
 976 static void check_not_current_branch(struct ref *ref_map)
 977 {
 978         struct branch *current_branch = branch_get(NULL);
 979
 980         if (is_bare_repository() || !current_branch)
 981                 return;
 982
 983         for (; ref_map; ref_map = ref_map->next)
 984                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
 985                                         ref_map->peer_ref->name))
 986                         die(_("Refusing to fetch into current branch %s "
 987                             "of non-bare repository"), current_branch->refname);
 988 }
 989
 990 static int truncate_fetch_head(void)
 991 {
 992         const char *filename = git_path_fetch_head();
 993         FILE *fp = fopen_for_writing(filename);
 994
 995         if (!fp)
 996                 return error_errno(_("cannot open %s"), filename);
 997         fclose(fp);
 998         return 0;
 999 }
1000
1001 static void set_option(struct transport *transport, const char *name, const char *value)
1002 {
1003         int r = transport_set_option(transport, name, value);
1004         if (r < 0)
1005                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1006                     name, value, transport->url);
1007         if (r > 0)
1008                 warning(_("Option \"%s\" is ignored for %s\n"),
1009                         name, transport->url);
1010 }
1011
1012 static struct transport *prepare_transport(struct remote *remote, int deepen)
1013 {
1014         struct transport *transport;
1015         transport = transport_get(remote, NULL);
1016         transport_set_verbosity(transport, verbosity, progress);
1017         transport->family = family;
1018         if (upload_pack)
1019                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1020         if (keep)
1021                 set_option(transport, TRANS_OPT_KEEP, "yes");
1022         if (depth)
1023                 set_option(transport, TRANS_OPT_DEPTH, depth);
1024         if (deepen && deepen_since)
1025                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1026         if (deepen && deepen_not.nr)
1027                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1028                            (const char *)&deepen_not);
1029         if (deepen_relative)
1030                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1031         if (update_shallow)
1032                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1033         return transport;
1034 }
1035
1036 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1037 {
1038         int cannot_reuse;
1039
1040         /*
1041          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1042          * when remote helper is used (setting it to an empty string
1043          * is not unsetting). We could extend the remote helper
1044          * protocol for that, but for now, just force a new connection
1045          * without deepen-since. Similar story for deepen-not.
1046          */
1047         cannot_reuse = transport->cannot_reuse ||
1048                 deepen_since || deepen_not.nr;
1049         if (cannot_reuse) {
1050                 gsecondary = prepare_transport(transport->remote, 0);
1051                 transport = gsecondary;
1052         }
1053
1054         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1055         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1056         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1057         fetch_refs(transport, ref_map);
1058
1059         if (gsecondary) {
1060                 transport_disconnect(gsecondary);
1061                 gsecondary = NULL;
1062         }
1063 }
1064
1065 static int do_fetch(struct transport *transport,
1066                     struct refspec *refs, int ref_count)
1067 {
1068         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1069         struct ref *ref_map;
1070         struct ref *rm;
1071         int autotags = (transport->remote->fetch_tags == 1);
1072         int retcode = 0;
1073
1074         for_each_ref(add_existing, &existing_refs);
1075
1076         if (tags == TAGS_DEFAULT) {
1077                 if (transport->remote->fetch_tags == 2)
1078                         tags = TAGS_SET;
1079                 if (transport->remote->fetch_tags == -1)
1080                         tags = TAGS_UNSET;
1081         }
1082
1083         if (!transport->get_refs_list || !transport->fetch)
1084                 die(_("Don't know how to fetch from %s"), transport->url);
1085
1086         /* if not appending, truncate FETCH_HEAD */
1087         if (!append && !dry_run) {
1088                 retcode = truncate_fetch_head();
1089                 if (retcode)
1090                         goto cleanup;
1091         }
1092
1093         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1094         if (!update_head_ok)
1095                 check_not_current_branch(ref_map);
1096
1097         for (rm = ref_map; rm; rm = rm->next) {
1098                 if (rm->peer_ref) {
1099                         struct string_list_item *peer_item =
1100                                 string_list_lookup(&existing_refs,
1101                                                    rm->peer_ref->name);
1102                         if (peer_item) {
1103                                 struct object_id *old_oid = peer_item->util;
1104                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1105                         }
1106                 }
1107         }
1108
1109         if (tags == TAGS_DEFAULT && autotags)
1110                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1111         if (prune) {
1112                 /*
1113                  * We only prune based on refspecs specified
1114                  * explicitly (via command line or configuration); we
1115                  * don't care whether --tags was specified.
1116                  */
1117                 if (ref_count) {
1118                         prune_refs(refs, ref_count, ref_map, transport->url);
1119                 } else {
1120                         prune_refs(transport->remote->fetch,
1121                                    transport->remote->fetch_refspec_nr,
1122                                    ref_map,
1123                                    transport->url);
1124                 }
1125         }
1126         if (fetch_refs(transport, ref_map)) {
1127                 free_refs(ref_map);
1128                 retcode = 1;
1129                 goto cleanup;
1130         }
1131         free_refs(ref_map);
1132
1133         /* if neither --no-tags nor --tags was specified, do automated tag
1134          * following ... */
1135         if (tags == TAGS_DEFAULT && autotags) {
1136                 struct ref **tail = &ref_map;
1137                 ref_map = NULL;
1138                 find_non_local_tags(transport, &ref_map, &tail);
1139                 if (ref_map)
1140                         backfill_tags(transport, ref_map);
1141                 free_refs(ref_map);
1142         }
1143
1144  cleanup:
1145         string_list_clear(&existing_refs, 1);
1146         return retcode;
1147 }
1148
1149 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1150 {
1151         struct string_list *list = priv;
1152         if (!remote->skip_default_update)
1153                 string_list_append(list, remote->name);
1154         return 0;
1155 }
1156
1157 struct remote_group_data {
1158         const char *name;
1159         struct string_list *list;
1160 };
1161
1162 static int get_remote_group(const char *key, const char *value, void *priv)
1163 {
1164         struct remote_group_data *g = priv;
1165
1166         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1167                 /* split list by white space */
1168                 while (*value) {
1169                         size_t wordlen = strcspn(value, " \t\n");
1170
1171                         if (wordlen >= 1)
1172                                 string_list_append_nodup(g->list,
1173                                                    xstrndup(value, wordlen));
1174                         value += wordlen + (value[wordlen] != '\0');
1175                 }
1176         }
1177
1178         return 0;
1179 }
1180
1181 static int add_remote_or_group(const char *name, struct string_list *list)
1182 {
1183         int prev_nr = list->nr;
1184         struct remote_group_data g;
1185         g.name = name; g.list = list;
1186
1187         git_config(get_remote_group, &g);
1188         if (list->nr == prev_nr) {
1189                 struct remote *remote = remote_get(name);
1190                 if (!remote_is_configured(remote, 0))
1191                         return 0;
1192                 string_list_append(list, remote->name);
1193         }
1194         return 1;
1195 }
1196
1197 static void add_options_to_argv(struct argv_array *argv)
1198 {
1199         if (dry_run)
1200                 argv_array_push(argv, "--dry-run");
1201         if (prune != -1)
1202                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1203         if (update_head_ok)
1204                 argv_array_push(argv, "--update-head-ok");
1205         if (force)
1206                 argv_array_push(argv, "--force");
1207         if (keep)
1208                 argv_array_push(argv, "--keep");
1209         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1210                 argv_array_push(argv, "--recurse-submodules");
1211         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1212                 argv_array_push(argv, "--recurse-submodules=on-demand");
1213         if (tags == TAGS_SET)
1214                 argv_array_push(argv, "--tags");
1215         else if (tags == TAGS_UNSET)
1216                 argv_array_push(argv, "--no-tags");
1217         if (verbosity >= 2)
1218                 argv_array_push(argv, "-v");
1219         if (verbosity >= 1)
1220                 argv_array_push(argv, "-v");
1221         else if (verbosity < 0)
1222                 argv_array_push(argv, "-q");
1223
1224 }
1225
1226 static int fetch_multiple(struct string_list *list)
1227 {
1228         int i, result = 0;
1229         struct argv_array argv = ARGV_ARRAY_INIT;
1230
1231         if (!append && !dry_run) {
1232                 int errcode = truncate_fetch_head();
1233                 if (errcode)
1234                         return errcode;
1235         }
1236
1237         argv_array_pushl(&argv, "fetch", "--append", NULL);
1238         add_options_to_argv(&argv);
1239
1240         for (i = 0; i < list->nr; i++) {
1241                 const char *name = list->items[i].string;
1242                 argv_array_push(&argv, name);
1243                 if (verbosity >= 0)
1244                         printf(_("Fetching %s\n"), name);
1245                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1246                         error(_("Could not fetch %s"), name);
1247                         result = 1;
1248                 }
1249                 argv_array_pop(&argv);
1250         }
1251
1252         argv_array_clear(&argv);
1253         return result;
1254 }
1255
1256 static int fetch_one(struct remote *remote, int argc, const char **argv)
1257 {
1258         static const char **refs = NULL;
1259         struct refspec *refspec;
1260         int ref_nr = 0;
1261         int exit_code;
1262
1263         if (!remote)
1264                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1265                     "remote name from which new revisions should be fetched."));
1266
1267         gtransport = prepare_transport(remote, 1);
1268
1269         if (prune < 0) {
1270                 /* no command line request */
1271                 if (0 <= gtransport->remote->prune)
1272                         prune = gtransport->remote->prune;
1273                 else if (0 <= fetch_prune_config)
1274                         prune = fetch_prune_config;
1275                 else
1276                         prune = PRUNE_BY_DEFAULT;
1277         }
1278
1279         if (argc > 0) {
1280                 int j = 0;
1281                 int i;
1282                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1283                 for (i = 0; i < argc; i++) {
1284                         if (!strcmp(argv[i], "tag")) {
1285                                 i++;
1286                                 if (i >= argc)
1287                                         die(_("You need to specify a tag name."));
1288                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1289                                                     argv[i], argv[i]);
1290                         } else
1291                                 refs[j++] = argv[i];
1292                 }
1293                 refs[j] = NULL;
1294                 ref_nr = j;
1295         }
1296
1297         sigchain_push_common(unlock_pack_on_signal);
1298         atexit(unlock_pack);
1299         refspec = parse_fetch_refspec(ref_nr, refs);
1300         exit_code = do_fetch(gtransport, refspec, ref_nr);
1301         free_refspec(ref_nr, refspec);
1302         transport_disconnect(gtransport);
1303         gtransport = NULL;
1304         return exit_code;
1305 }
1306
1307 int cmd_fetch(int argc, const char **argv, const char *prefix)
1308 {
1309         int i;
1310         struct string_list list = STRING_LIST_INIT_DUP;
1311         struct remote *remote;
1312         int result = 0;
1313         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1314
1315         packet_trace_identity("fetch");
1316
1317         /* Record the command line for the reflog */
1318         strbuf_addstr(&default_rla, "fetch");
1319         for (i = 1; i < argc; i++)
1320                 strbuf_addf(&default_rla, " %s", argv[i]);
1321
1322         git_config(git_fetch_config, NULL);
1323
1324         argc = parse_options(argc, argv, prefix,
1325                              builtin_fetch_options, builtin_fetch_usage, 0);
1326
1327         if (deepen_relative) {
1328                 if (deepen_relative < 0)
1329                         die(_("Negative depth in --deepen is not supported"));
1330                 if (depth)
1331                         die(_("--deepen and --depth are mutually exclusive"));
1332                 depth = xstrfmt("%d", deepen_relative);
1333         }
1334         if (unshallow) {
1335                 if (depth)
1336                         die(_("--depth and --unshallow cannot be used together"));
1337                 else if (!is_repository_shallow())
1338                         die(_("--unshallow on a complete repository does not make sense"));
1339                 else
1340                         depth = xstrfmt("%d", INFINITE_DEPTH);
1341         }
1342
1343         /* no need to be strict, transport_set_option() will validate it again */
1344         if (depth && atoi(depth) < 1)
1345                 die(_("depth %s is not a positive number"), depth);
1346         if (depth || deepen_since || deepen_not.nr)
1347                 deepen = 1;
1348
1349         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1350                 if (recurse_submodules_default) {
1351                         int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1352                         set_config_fetch_recurse_submodules(arg);
1353                 }
1354                 gitmodules_config();
1355                 git_config(submodule_config, NULL);
1356         }
1357
1358         if (all) {
1359                 if (argc == 1)
1360                         die(_("fetch --all does not take a repository argument"));
1361                 else if (argc > 1)
1362                         die(_("fetch --all does not make sense with refspecs"));
1363                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1364                 result = fetch_multiple(&list);
1365         } else if (argc == 0) {
1366                 /* No arguments -- use default remote */
1367                 remote = remote_get(NULL);
1368                 result = fetch_one(remote, argc, argv);
1369         } else if (multiple) {
1370                 /* All arguments are assumed to be remotes or groups */
1371                 for (i = 0; i < argc; i++)
1372                         if (!add_remote_or_group(argv[i], &list))
1373                                 die(_("No such remote or remote group: %s"), argv[i]);
1374                 result = fetch_multiple(&list);
1375         } else {
1376                 /* Single remote or group */
1377                 (void) add_remote_or_group(argv[0], &list);
1378                 if (list.nr > 1) {
1379                         /* More than one remote */
1380                         if (argc > 1)
1381                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1382                         result = fetch_multiple(&list);
1383                 } else {
1384                         /* Zero or one remotes */
1385                         remote = remote_get(argv[0]);
1386                         result = fetch_one(remote, argc-1, argv+1);
1387                 }
1388         }
1389
1390         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1391                 struct argv_array options = ARGV_ARRAY_INIT;
1392
1393                 add_options_to_argv(&options);
1394                 result = fetch_populated_submodules(&options,
1395                                                     submodule_prefix,
1396                                                     recurse_submodules,
1397                                                     verbosity < 0,
1398                                                     max_children);
1399                 argv_array_clear(&options);
1400         }
1401
1402         string_list_clear(&list, 0);
1403
1404         close_all_packs();
1405
1406         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1407         if (verbosity < 0)
1408                 argv_array_push(&argv_gc_auto, "--quiet");
1409         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1410         argv_array_clear(&argv_gc_auto);
1411
1412         return result;
1413 }