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