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 by 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
 363                 if (tags == TAGS_SET)
 364                         get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 365         } else if (refmap_array) {
 366                 die("--refmap option is only meaningful with command-line refspec(s).");
 367         } else {
 368                 /* Use the defaults */
 369                 struct remote *remote = transport->remote;
 370                 struct branch *branch = branch_get(NULL);
 371                 int has_merge = branch_has_merge_config(branch);
 372                 if (remote &&
 373                     (remote->fetch_refspec_nr ||
 374                      /* Note: has_merge implies non-NULL branch->remote_name */
 375                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 376                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 377                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 378                                 if (remote->fetch[i].dst &&
 379                                     remote->fetch[i].dst[0])
 380                                         *autotags = 1;
 381                                 if (!i && !has_merge && ref_map &&
 382                                     !remote->fetch[0].pattern)
 383                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 384                         }
 385                         /*
 386                          * if the remote we're fetching from is the same
 387                          * as given in branch.<name>.remote, we add the
 388                          * ref given in branch.<name>.merge, too.
 389                          *
 390                          * Note: has_merge implies non-NULL branch->remote_name
 391                          */
 392                         if (has_merge &&
 393                             !strcmp(branch->remote_name, remote->name))
 394                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 395                 } else {
 396                         ref_map = get_remote_ref(remote_refs, "HEAD");
 397                         if (!ref_map)
 398                                 die(_("Couldn't find remote ref HEAD"));
 399                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 400                         tail = &ref_map->next;
 401                 }
 402         }
 403
 404         if (tags == TAGS_SET)
 405                 /* also fetch all tags */
 406                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 407         else if (tags == TAGS_DEFAULT && *autotags)
 408                 find_non_local_tags(transport, &ref_map, &tail);
 409
 410         /* Now append any refs to be updated opportunistically: */
 411         *tail = orefs;
 412         for (rm = orefs; rm; rm = rm->next) {
 413                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
 414                 tail = &rm->next;
 415         }
 416
 417         return ref_remove_duplicates(ref_map);
 418 }
 419
 420 #define STORE_REF_ERROR_OTHER 1
 421 #define STORE_REF_ERROR_DF_CONFLICT 2
 422
 423 static int s_update_ref(const char *action,
 424                         struct ref *ref,
 425                         int check_old)
 426 {
 427         char msg[1024];
 428         char *rla = getenv("GIT_REFLOG_ACTION");
 429         struct ref_transaction *transaction;
 430         struct strbuf err = STRBUF_INIT;
 431         int ret, df_conflict = 0;
 432
 433         if (dry_run)
 434                 return 0;
 435         if (!rla)
 436                 rla = default_rla.buf;
 437         snprintf(msg, sizeof(msg), "%s: %s", rla, action);
 438
 439         transaction = ref_transaction_begin(&err);
 440         if (!transaction ||
 441             ref_transaction_update(transaction, ref->name,
 442                                    ref->new_oid.hash,
 443                                    check_old ? ref->old_oid.hash : NULL,
 444                                    0, msg, &err))
 445                 goto fail;
 446
 447         ret = ref_transaction_commit(transaction, &err);
 448         if (ret) {
 449                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 450                 goto fail;
 451         }
 452
 453         ref_transaction_free(transaction);
 454         strbuf_release(&err);
 455         return 0;
 456 fail:
 457         ref_transaction_free(transaction);
 458         error("%s", err.buf);
 459         strbuf_release(&err);
 460         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 461                            : STORE_REF_ERROR_OTHER;
 462 }
 463
 464 static int refcol_width = 10;
 465 static int compact_format;
 466
 467 static void adjust_refcol_width(const struct ref *ref)
 468 {
 469         int max, rlen, llen, len;
 470
 471         /* uptodate lines are only shown on high verbosity level */
 472         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 473                 return;
 474
 475         max    = term_columns();
 476         rlen   = utf8_strwidth(prettify_refname(ref->name));
 477
 478         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 479
 480         /*
 481          * rough estimation to see if the output line is too long and
 482          * should not be counted (we can't do precise calculation
 483          * anyway because we don't know if the error explanation part
 484          * will be printed in update_local_ref)
 485          */
 486         if (compact_format) {
 487                 llen = 0;
 488                 max = max * 2 / 3;
 489         }
 490         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 491         if (len >= max)
 492                 return;
 493
 494         /*
 495          * Not precise calculation for compact mode because '*' can
 496          * appear on the left hand side of '->' and shrink the column
 497          * back.
 498          */
 499         if (refcol_width < rlen)
 500                 refcol_width = rlen;
 501 }
 502
 503 static void prepare_format_display(struct ref *ref_map)
 504 {
 505         struct ref *rm;
 506         const char *format = "full";
 507
 508         git_config_get_string_const("fetch.output", &format);
 509         if (!strcasecmp(format, "full"))
 510                 compact_format = 0;
 511         else if (!strcasecmp(format, "compact"))
 512                 compact_format = 1;
 513         else
 514                 die(_("configuration fetch.output contains invalid value %s"),
 515                     format);
 516
 517         for (rm = ref_map; rm; rm = rm->next) {
 518                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 519                     !rm->peer_ref ||
 520                     !strcmp(rm->name, "HEAD"))
 521                         continue;
 522
 523                 adjust_refcol_width(rm);
 524         }
 525 }
 526
 527 static void print_remote_to_local(struct strbuf *display,
 528                                   const char *remote, const char *local)
 529 {
 530         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 531 }
 532
 533 static int find_and_replace(struct strbuf *haystack,
 534                             const char *needle,
 535                             const char *placeholder)
 536 {
 537         const char *p = strstr(haystack->buf, needle);
 538         int plen, nlen;
 539
 540         if (!p)
 541                 return 0;
 542
 543         if (p > haystack->buf && p[-1] != '/')
 544                 return 0;
 545
 546         plen = strlen(p);
 547         nlen = strlen(needle);
 548         if (plen > nlen && p[nlen] != '/')
 549                 return 0;
 550
 551         strbuf_splice(haystack, p - haystack->buf, nlen,
 552                       placeholder, strlen(placeholder));
 553         return 1;
 554 }
 555
 556 static void print_compact(struct strbuf *display,
 557                           const char *remote, const char *local)
 558 {
 559         struct strbuf r = STRBUF_INIT;
 560         struct strbuf l = STRBUF_INIT;
 561
 562         if (!strcmp(remote, local)) {
 563                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 564                 return;
 565         }
 566
 567         strbuf_addstr(&r, remote);
 568         strbuf_addstr(&l, local);
 569
 570         if (!find_and_replace(&r, local, "*"))
 571                 find_and_replace(&l, remote, "*");
 572         print_remote_to_local(display, r.buf, l.buf);
 573
 574         strbuf_release(&r);
 575         strbuf_release(&l);
 576 }
 577
 578 static void format_display(struct strbuf *display, char code,
 579                            const char *summary, const char *error,
 580                            const char *remote, const char *local,
 581                            int summary_width)
 582 {
 583         int width = (summary_width + strlen(summary) - gettext_width(summary));
 584
 585         strbuf_addf(display, "%c %-*s ", code, width, summary);
 586         if (!compact_format)
 587                 print_remote_to_local(display, remote, local);
 588         else
 589                 print_compact(display, remote, local);
 590         if (error)
 591                 strbuf_addf(display, "  (%s)", error);
 592 }
 593
 594 static int update_local_ref(struct ref *ref,
 595                             const char *remote,
 596                             const struct ref *remote_ref,
 597                             struct strbuf *display,
 598                             int summary_width)
 599 {
 600         struct commit *current = NULL, *updated;
 601         enum object_type type;
 602         struct branch *current_branch = branch_get(NULL);
 603         const char *pretty_ref = prettify_refname(ref->name);
 604
 605         type = sha1_object_info(ref->new_oid.hash, NULL);
 606         if (type < 0)
 607                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 608
 609         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 610                 if (verbosity > 0)
 611                         format_display(display, '=', _("[up to date]"), NULL,
 612                                        remote, pretty_ref, summary_width);
 613                 return 0;
 614         }
 615
 616         if (current_branch &&
 617             !strcmp(ref->name, current_branch->name) &&
 618             !(update_head_ok || is_bare_repository()) &&
 619             !is_null_oid(&ref->old_oid)) {
 620                 /*
 621                  * If this is the head, and it's not okay to update
 622                  * the head, and the old value of the head isn't empty...
 623                  */
 624                 format_display(display, '!', _("[rejected]"),
 625                                _("can't fetch in current branch"),
 626                                remote, pretty_ref, summary_width);
 627                 return 1;
 628         }
 629
 630         if (!is_null_oid(&ref->old_oid) &&
 631             starts_with(ref->name, "refs/tags/")) {
 632                 int r;
 633                 r = s_update_ref("updating tag", ref, 0);
 634                 format_display(display, r ? '!' : 't', _("[tag update]"),
 635                                r ? _("unable to update local ref") : NULL,
 636                                remote, pretty_ref, summary_width);
 637                 return r;
 638         }
 639
 640         current = lookup_commit_reference_gently(ref->old_oid.hash, 1);
 641         updated = lookup_commit_reference_gently(ref->new_oid.hash, 1);
 642         if (!current || !updated) {
 643                 const char *msg;
 644                 const char *what;
 645                 int r;
 646                 /*
 647                  * Nicely describe the new ref we're fetching.
 648                  * Base this on the remote's ref name, as it's
 649                  * more likely to follow a standard layout.
 650                  */
 651                 const char *name = remote_ref ? remote_ref->name : "";
 652                 if (starts_with(name, "refs/tags/")) {
 653                         msg = "storing tag";
 654                         what = _("[new tag]");
 655                 } else if (starts_with(name, "refs/heads/")) {
 656                         msg = "storing head";
 657                         what = _("[new branch]");
 658                 } else {
 659                         msg = "storing ref";
 660                         what = _("[new ref]");
 661                 }
 662
 663                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 664                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 665                         check_for_new_submodule_commits(ref->new_oid.hash);
 666                 r = s_update_ref(msg, ref, 0);
 667                 format_display(display, r ? '!' : '*', what,
 668                                r ? _("unable to update local ref") : NULL,
 669                                remote, pretty_ref, summary_width);
 670                 return r;
 671         }
 672
 673         if (in_merge_bases(current, updated)) {
 674                 struct strbuf quickref = STRBUF_INIT;
 675                 int r;
 676                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 677                 strbuf_addstr(&quickref, "..");
 678                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 679                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 680                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 681                         check_for_new_submodule_commits(ref->new_oid.hash);
 682                 r = s_update_ref("fast-forward", ref, 1);
 683                 format_display(display, r ? '!' : ' ', quickref.buf,
 684                                r ? _("unable to update local ref") : NULL,
 685                                remote, pretty_ref, summary_width);
 686                 strbuf_release(&quickref);
 687                 return r;
 688         } else if (force || ref->force) {
 689                 struct strbuf quickref = STRBUF_INIT;
 690                 int r;
 691                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 692                 strbuf_addstr(&quickref, "...");
 693                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 694                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 695                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 696                         check_for_new_submodule_commits(ref->new_oid.hash);
 697                 r = s_update_ref("forced-update", ref, 1);
 698                 format_display(display, r ? '!' : '+', quickref.buf,
 699                                r ? _("unable to update local ref") : _("forced update"),
 700                                remote, pretty_ref, summary_width);
 701                 strbuf_release(&quickref);
 702                 return r;
 703         } else {
 704                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 705                                remote, pretty_ref, summary_width);
 706                 return 1;
 707         }
 708 }
 709
 710 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
 711 {
 712         struct ref **rm = cb_data;
 713         struct ref *ref = *rm;
 714
 715         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 716                 ref = ref->next;
 717         if (!ref)
 718                 return -1; /* end of the list */
 719         *rm = ref->next;
 720         hashcpy(sha1, ref->old_oid.hash);
 721         return 0;
 722 }
 723
 724 static int store_updated_refs(const char *raw_url, const char *remote_name,
 725                 struct ref *ref_map)
 726 {
 727         FILE *fp;
 728         struct commit *commit;
 729         int url_len, i, rc = 0;
 730         struct strbuf note = STRBUF_INIT;
 731         const char *what, *kind;
 732         struct ref *rm;
 733         char *url;
 734         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 735         int want_status;
 736         int summary_width = transport_summary_width(ref_map);
 737
 738         fp = fopen(filename, "a");
 739         if (!fp)
 740                 return error_errno(_("cannot open %s"), filename);
 741
 742         if (raw_url)
 743                 url = transport_anonymize_url(raw_url);
 744         else
 745                 url = xstrdup("foreign");
 746
 747         rm = ref_map;
 748         if (check_connected(iterate_ref_map, &rm, NULL)) {
 749                 rc = error(_("%s did not send all necessary objects\n"), url);
 750                 goto abort;
 751         }
 752
 753         prepare_format_display(ref_map);
 754
 755         /*
 756          * We do a pass for each fetch_head_status type in their enum order, so
 757          * merged entries are written before not-for-merge. That lets readers
 758          * use FETCH_HEAD as a refname to refer to the ref to be merged.
 759          */
 760         for (want_status = FETCH_HEAD_MERGE;
 761              want_status <= FETCH_HEAD_IGNORE;
 762              want_status++) {
 763                 for (rm = ref_map; rm; rm = rm->next) {
 764                         struct ref *ref = NULL;
 765                         const char *merge_status_marker = "";
 766
 767                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 768                                 if (want_status == FETCH_HEAD_MERGE)
 769                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
 770                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
 771                                 continue;
 772                         }
 773
 774                         commit = lookup_commit_reference_gently(rm->old_oid.hash, 1);
 775                         if (!commit)
 776                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 777
 778                         if (rm->fetch_head_status != want_status)
 779                                 continue;
 780
 781                         if (rm->peer_ref) {
 782                                 ref = alloc_ref(rm->peer_ref->name);
 783                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 784                                 oidcpy(&ref->new_oid, &rm->old_oid);
 785                                 ref->force = rm->peer_ref->force;
 786                         }
 787
 788
 789                         if (!strcmp(rm->name, "HEAD")) {
 790                                 kind = "";
 791                                 what = "";
 792                         }
 793                         else if (starts_with(rm->name, "refs/heads/")) {
 794                                 kind = "branch";
 795                                 what = rm->name + 11;
 796                         }
 797                         else if (starts_with(rm->name, "refs/tags/")) {
 798                                 kind = "tag";
 799                                 what = rm->name + 10;
 800                         }
 801                         else if (starts_with(rm->name, "refs/remotes/")) {
 802                                 kind = "remote-tracking branch";
 803                                 what = rm->name + 13;
 804                         }
 805                         else {
 806                                 kind = "";
 807                                 what = rm->name;
 808                         }
 809
 810                         url_len = strlen(url);
 811                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 812                                 ;
 813                         url_len = i + 1;
 814                         if (4 < i && !strncmp(".git", url + i - 3, 4))
 815                                 url_len = i - 3;
 816
 817                         strbuf_reset(&note);
 818                         if (*what) {
 819                                 if (*kind)
 820                                         strbuf_addf(&note, "%s ", kind);
 821                                 strbuf_addf(&note, "'%s' of ", what);
 822                         }
 823                         switch (rm->fetch_head_status) {
 824                         case FETCH_HEAD_NOT_FOR_MERGE:
 825                                 merge_status_marker = "not-for-merge";
 826                                 /* fall-through */
 827                         case FETCH_HEAD_MERGE:
 828                                 fprintf(fp, "%s\t%s\t%s",
 829                                         oid_to_hex(&rm->old_oid),
 830                                         merge_status_marker,
 831                                         note.buf);
 832                                 for (i = 0; i < url_len; ++i)
 833                                         if ('\n' == url[i])
 834                                                 fputs("\\n", fp);
 835                                         else
 836                                                 fputc(url[i], fp);
 837                                 fputc('\n', fp);
 838                                 break;
 839                         default:
 840                                 /* do not write anything to FETCH_HEAD */
 841                                 break;
 842                         }
 843
 844                         strbuf_reset(&note);
 845                         if (ref) {
 846                                 rc |= update_local_ref(ref, what, rm, &note,
 847                                                        summary_width);
 848                                 free(ref);
 849                         } else
 850                                 format_display(&note, '*',
 851                                                *kind ? kind : "branch", NULL,
 852                                                *what ? what : "HEAD",
 853                                                "FETCH_HEAD", summary_width);
 854                         if (note.len) {
 855                                 if (verbosity >= 0 && !shown_url) {
 856                                         fprintf(stderr, _("From %.*s\n"),
 857                                                         url_len, url);
 858                                         shown_url = 1;
 859                                 }
 860                                 if (verbosity >= 0)
 861                                         fprintf(stderr, " %s\n", note.buf);
 862                         }
 863                 }
 864         }
 865
 866         if (rc & STORE_REF_ERROR_DF_CONFLICT)
 867                 error(_("some local refs could not be updated; try running\n"
 868                       " 'git remote prune %s' to remove any old, conflicting "
 869                       "branches"), remote_name);
 870
 871  abort:
 872         strbuf_release(&note);
 873         free(url);
 874         fclose(fp);
 875         return rc;
 876 }
 877
 878 /*
 879  * We would want to bypass the object transfer altogether if
 880  * everything we are going to fetch already exists and is connected
 881  * locally.
 882  */
 883 static int quickfetch(struct ref *ref_map)
 884 {
 885         struct ref *rm = ref_map;
 886         struct check_connected_options opt = CHECK_CONNECTED_INIT;
 887
 888         /*
 889          * If we are deepening a shallow clone we already have these
 890          * objects reachable.  Running rev-list here will return with
 891          * a good (0) exit status and we'll bypass the fetch that we
 892          * really need to perform.  Claiming failure now will ensure
 893          * we perform the network exchange to deepen our history.
 894          */
 895         if (deepen)
 896                 return -1;
 897         opt.quiet = 1;
 898         return check_connected(iterate_ref_map, &rm, &opt);
 899 }
 900
 901 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 902 {
 903         int ret = quickfetch(ref_map);
 904         if (ret)
 905                 ret = transport_fetch_refs(transport, ref_map);
 906         if (!ret)
 907                 ret |= store_updated_refs(transport->url,
 908                                 transport->remote->name,
 909                                 ref_map);
 910         transport_unlock_pack(transport);
 911         return ret;
 912 }
 913
 914 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 915                 const char *raw_url)
 916 {
 917         int url_len, i, result = 0;
 918         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 919         char *url;
 920         int summary_width = transport_summary_width(stale_refs);
 921         const char *dangling_msg = dry_run
 922                 ? _("   (%s will become dangling)")
 923                 : _("   (%s has become dangling)");
 924
 925         if (raw_url)
 926                 url = transport_anonymize_url(raw_url);
 927         else
 928                 url = xstrdup("foreign");
 929
 930         url_len = strlen(url);
 931         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 932                 ;
 933
 934         url_len = i + 1;
 935         if (4 < i && !strncmp(".git", url + i - 3, 4))
 936                 url_len = i - 3;
 937
 938         if (!dry_run) {
 939                 struct string_list refnames = STRING_LIST_INIT_NODUP;
 940
 941                 for (ref = stale_refs; ref; ref = ref->next)
 942                         string_list_append(&refnames, ref->name);
 943
 944                 result = delete_refs(&refnames, 0);
 945                 string_list_clear(&refnames, 0);
 946         }
 947
 948         if (verbosity >= 0) {
 949                 for (ref = stale_refs; ref; ref = ref->next) {
 950                         struct strbuf sb = STRBUF_INIT;
 951                         if (!shown_url) {
 952                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
 953                                 shown_url = 1;
 954                         }
 955                         format_display(&sb, '-', _("[deleted]"), NULL,
 956                                        _("(none)"), prettify_refname(ref->name),
 957                                        summary_width);
 958                         fprintf(stderr, " %s\n",sb.buf);
 959                         strbuf_release(&sb);
 960                         warn_dangling_symref(stderr, dangling_msg, ref->name);
 961                 }
 962         }
 963
 964         free(url);
 965         free_refs(stale_refs);
 966         return result;
 967 }
 968
 969 static void check_not_current_branch(struct ref *ref_map)
 970 {
 971         struct branch *current_branch = branch_get(NULL);
 972
 973         if (is_bare_repository() || !current_branch)
 974                 return;
 975
 976         for (; ref_map; ref_map = ref_map->next)
 977                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
 978                                         ref_map->peer_ref->name))
 979                         die(_("Refusing to fetch into current branch %s "
 980                             "of non-bare repository"), current_branch->refname);
 981 }
 982
 983 static int truncate_fetch_head(void)
 984 {
 985         const char *filename = git_path_fetch_head();
 986         FILE *fp = fopen_for_writing(filename);
 987
 988         if (!fp)
 989                 return error_errno(_("cannot open %s"), filename);
 990         fclose(fp);
 991         return 0;
 992 }
 993
 994 static void set_option(struct transport *transport, const char *name, const char *value)
 995 {
 996         int r = transport_set_option(transport, name, value);
 997         if (r < 0)
 998                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
 999                     name, value, transport->url);
1000         if (r > 0)
1001                 warning(_("Option \"%s\" is ignored for %s\n"),
1002                         name, transport->url);
1003 }
1004
1005 static struct transport *prepare_transport(struct remote *remote, int deepen)
1006 {
1007         struct transport *transport;
1008         transport = transport_get(remote, NULL);
1009         transport_set_verbosity(transport, verbosity, progress);
1010         transport->family = family;
1011         if (upload_pack)
1012                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1013         if (keep)
1014                 set_option(transport, TRANS_OPT_KEEP, "yes");
1015         if (depth)
1016                 set_option(transport, TRANS_OPT_DEPTH, depth);
1017         if (deepen && deepen_since)
1018                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1019         if (deepen && deepen_not.nr)
1020                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1021                            (const char *)&deepen_not);
1022         if (deepen_relative)
1023                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1024         if (update_shallow)
1025                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1026         return transport;
1027 }
1028
1029 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1030 {
1031         int cannot_reuse;
1032
1033         /*
1034          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1035          * when remote helper is used (setting it to an empty string
1036          * is not unsetting). We could extend the remote helper
1037          * protocol for that, but for now, just force a new connection
1038          * without deepen-since. Similar story for deepen-not.
1039          */
1040         cannot_reuse = transport->cannot_reuse ||
1041                 deepen_since || deepen_not.nr;
1042         if (cannot_reuse) {
1043                 gsecondary = prepare_transport(transport->remote, 0);
1044                 transport = gsecondary;
1045         }
1046
1047         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1048         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1049         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1050         fetch_refs(transport, ref_map);
1051
1052         if (gsecondary) {
1053                 transport_disconnect(gsecondary);
1054                 gsecondary = NULL;
1055         }
1056 }
1057
1058 static int do_fetch(struct transport *transport,
1059                     struct refspec *refs, int ref_count)
1060 {
1061         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1062         struct ref *ref_map;
1063         struct ref *rm;
1064         int autotags = (transport->remote->fetch_tags == 1);
1065         int retcode = 0;
1066
1067         for_each_ref(add_existing, &existing_refs);
1068
1069         if (tags == TAGS_DEFAULT) {
1070                 if (transport->remote->fetch_tags == 2)
1071                         tags = TAGS_SET;
1072                 if (transport->remote->fetch_tags == -1)
1073                         tags = TAGS_UNSET;
1074         }
1075
1076         if (!transport->get_refs_list || !transport->fetch)
1077                 die(_("Don't know how to fetch from %s"), transport->url);
1078
1079         /* if not appending, truncate FETCH_HEAD */
1080         if (!append && !dry_run) {
1081                 retcode = truncate_fetch_head();
1082                 if (retcode)
1083                         goto cleanup;
1084         }
1085
1086         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1087         if (!update_head_ok)
1088                 check_not_current_branch(ref_map);
1089
1090         for (rm = ref_map; rm; rm = rm->next) {
1091                 if (rm->peer_ref) {
1092                         struct string_list_item *peer_item =
1093                                 string_list_lookup(&existing_refs,
1094                                                    rm->peer_ref->name);
1095                         if (peer_item) {
1096                                 struct object_id *old_oid = peer_item->util;
1097                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1098                         }
1099                 }
1100         }
1101
1102         if (tags == TAGS_DEFAULT && autotags)
1103                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1104         if (prune) {
1105                 /*
1106                  * We only prune based on refspecs specified
1107                  * explicitly (via command line or configuration); we
1108                  * don't care whether --tags was specified.
1109                  */
1110                 if (ref_count) {
1111                         prune_refs(refs, ref_count, ref_map, transport->url);
1112                 } else {
1113                         prune_refs(transport->remote->fetch,
1114                                    transport->remote->fetch_refspec_nr,
1115                                    ref_map,
1116                                    transport->url);
1117                 }
1118         }
1119         if (fetch_refs(transport, ref_map)) {
1120                 free_refs(ref_map);
1121                 retcode = 1;
1122                 goto cleanup;
1123         }
1124         free_refs(ref_map);
1125
1126         /* if neither --no-tags nor --tags was specified, do automated tag
1127          * following ... */
1128         if (tags == TAGS_DEFAULT && autotags) {
1129                 struct ref **tail = &ref_map;
1130                 ref_map = NULL;
1131                 find_non_local_tags(transport, &ref_map, &tail);
1132                 if (ref_map)
1133                         backfill_tags(transport, ref_map);
1134                 free_refs(ref_map);
1135         }
1136
1137  cleanup:
1138         string_list_clear(&existing_refs, 1);
1139         return retcode;
1140 }
1141
1142 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1143 {
1144         struct string_list *list = priv;
1145         if (!remote->skip_default_update)
1146                 string_list_append(list, remote->name);
1147         return 0;
1148 }
1149
1150 struct remote_group_data {
1151         const char *name;
1152         struct string_list *list;
1153 };
1154
1155 static int get_remote_group(const char *key, const char *value, void *priv)
1156 {
1157         struct remote_group_data *g = priv;
1158
1159         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1160                 /* split list by white space */
1161                 while (*value) {
1162                         size_t wordlen = strcspn(value, " \t\n");
1163
1164                         if (wordlen >= 1)
1165                                 string_list_append_nodup(g->list,
1166                                                    xstrndup(value, wordlen));
1167                         value += wordlen + (value[wordlen] != '\0');
1168                 }
1169         }
1170
1171         return 0;
1172 }
1173
1174 static int add_remote_or_group(const char *name, struct string_list *list)
1175 {
1176         int prev_nr = list->nr;
1177         struct remote_group_data g;
1178         g.name = name; g.list = list;
1179
1180         git_config(get_remote_group, &g);
1181         if (list->nr == prev_nr) {
1182                 struct remote *remote = remote_get(name);
1183                 if (!remote_is_configured(remote))
1184                         return 0;
1185                 string_list_append(list, remote->name);
1186         }
1187         return 1;
1188 }
1189
1190 static void add_options_to_argv(struct argv_array *argv)
1191 {
1192         if (dry_run)
1193                 argv_array_push(argv, "--dry-run");
1194         if (prune != -1)
1195                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1196         if (update_head_ok)
1197                 argv_array_push(argv, "--update-head-ok");
1198         if (force)
1199                 argv_array_push(argv, "--force");
1200         if (keep)
1201                 argv_array_push(argv, "--keep");
1202         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1203                 argv_array_push(argv, "--recurse-submodules");
1204         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1205                 argv_array_push(argv, "--recurse-submodules=on-demand");
1206         if (tags == TAGS_SET)
1207                 argv_array_push(argv, "--tags");
1208         else if (tags == TAGS_UNSET)
1209                 argv_array_push(argv, "--no-tags");
1210         if (verbosity >= 2)
1211                 argv_array_push(argv, "-v");
1212         if (verbosity >= 1)
1213                 argv_array_push(argv, "-v");
1214         else if (verbosity < 0)
1215                 argv_array_push(argv, "-q");
1216
1217 }
1218
1219 static int fetch_multiple(struct string_list *list)
1220 {
1221         int i, result = 0;
1222         struct argv_array argv = ARGV_ARRAY_INIT;
1223
1224         if (!append && !dry_run) {
1225                 int errcode = truncate_fetch_head();
1226                 if (errcode)
1227                         return errcode;
1228         }
1229
1230         argv_array_pushl(&argv, "fetch", "--append", NULL);
1231         add_options_to_argv(&argv);
1232
1233         for (i = 0; i < list->nr; i++) {
1234                 const char *name = list->items[i].string;
1235                 argv_array_push(&argv, name);
1236                 if (verbosity >= 0)
1237                         printf(_("Fetching %s\n"), name);
1238                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1239                         error(_("Could not fetch %s"), name);
1240                         result = 1;
1241                 }
1242                 argv_array_pop(&argv);
1243         }
1244
1245         argv_array_clear(&argv);
1246         return result;
1247 }
1248
1249 static int fetch_one(struct remote *remote, int argc, const char **argv)
1250 {
1251         static const char **refs = NULL;
1252         struct refspec *refspec;
1253         int ref_nr = 0;
1254         int exit_code;
1255
1256         if (!remote)
1257                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1258                     "remote name from which new revisions should be fetched."));
1259
1260         gtransport = prepare_transport(remote, 1);
1261
1262         if (prune < 0) {
1263                 /* no command line request */
1264                 if (0 <= gtransport->remote->prune)
1265                         prune = gtransport->remote->prune;
1266                 else if (0 <= fetch_prune_config)
1267                         prune = fetch_prune_config;
1268                 else
1269                         prune = PRUNE_BY_DEFAULT;
1270         }
1271
1272         if (argc > 0) {
1273                 int j = 0;
1274                 int i;
1275                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1276                 for (i = 0; i < argc; i++) {
1277                         if (!strcmp(argv[i], "tag")) {
1278                                 i++;
1279                                 if (i >= argc)
1280                                         die(_("You need to specify a tag name."));
1281                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1282                                                     argv[i], argv[i]);
1283                         } else
1284                                 refs[j++] = argv[i];
1285                 }
1286                 refs[j] = NULL;
1287                 ref_nr = j;
1288         }
1289
1290         sigchain_push_common(unlock_pack_on_signal);
1291         atexit(unlock_pack);
1292         refspec = parse_fetch_refspec(ref_nr, refs);
1293         exit_code = do_fetch(gtransport, refspec, ref_nr);
1294         free_refspec(ref_nr, refspec);
1295         transport_disconnect(gtransport);
1296         gtransport = NULL;
1297         return exit_code;
1298 }
1299
1300 int cmd_fetch(int argc, const char **argv, const char *prefix)
1301 {
1302         int i;
1303         struct string_list list = STRING_LIST_INIT_DUP;
1304         struct remote *remote;
1305         int result = 0;
1306         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1307
1308         packet_trace_identity("fetch");
1309
1310         /* Record the command line for the reflog */
1311         strbuf_addstr(&default_rla, "fetch");
1312         for (i = 1; i < argc; i++)
1313                 strbuf_addf(&default_rla, " %s", argv[i]);
1314
1315         git_config(git_fetch_config, NULL);
1316
1317         argc = parse_options(argc, argv, prefix,
1318                              builtin_fetch_options, builtin_fetch_usage, 0);
1319
1320         if (deepen_relative) {
1321                 if (deepen_relative < 0)
1322                         die(_("Negative depth in --deepen is not supported"));
1323                 if (depth)
1324                         die(_("--deepen and --depth are mutually exclusive"));
1325                 depth = xstrfmt("%d", deepen_relative);
1326         }
1327         if (unshallow) {
1328                 if (depth)
1329                         die(_("--depth and --unshallow cannot be used together"));
1330                 else if (!is_repository_shallow())
1331                         die(_("--unshallow on a complete repository does not make sense"));
1332                 else
1333                         depth = xstrfmt("%d", INFINITE_DEPTH);
1334         }
1335
1336         /* no need to be strict, transport_set_option() will validate it again */
1337         if (depth && atoi(depth) < 1)
1338                 die(_("depth %s is not a positive number"), depth);
1339         if (depth || deepen_since || deepen_not.nr)
1340                 deepen = 1;
1341
1342         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1343                 if (recurse_submodules_default) {
1344                         int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1345                         set_config_fetch_recurse_submodules(arg);
1346                 }
1347                 gitmodules_config();
1348                 git_config(submodule_config, NULL);
1349         }
1350
1351         if (all) {
1352                 if (argc == 1)
1353                         die(_("fetch --all does not take a repository argument"));
1354                 else if (argc > 1)
1355                         die(_("fetch --all does not make sense with refspecs"));
1356                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1357                 result = fetch_multiple(&list);
1358         } else if (argc == 0) {
1359                 /* No arguments -- use default remote */
1360                 remote = remote_get(NULL);
1361                 result = fetch_one(remote, argc, argv);
1362         } else if (multiple) {
1363                 /* All arguments are assumed to be remotes or groups */
1364                 for (i = 0; i < argc; i++)
1365                         if (!add_remote_or_group(argv[i], &list))
1366                                 die(_("No such remote or remote group: %s"), argv[i]);
1367                 result = fetch_multiple(&list);
1368         } else {
1369                 /* Single remote or group */
1370                 (void) add_remote_or_group(argv[0], &list);
1371                 if (list.nr > 1) {
1372                         /* More than one remote */
1373                         if (argc > 1)
1374                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1375                         result = fetch_multiple(&list);
1376                 } else {
1377                         /* Zero or one remotes */
1378                         remote = remote_get(argv[0]);
1379                         result = fetch_one(remote, argc-1, argv+1);
1380                 }
1381         }
1382
1383         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1384                 struct argv_array options = ARGV_ARRAY_INIT;
1385
1386                 add_options_to_argv(&options);
1387                 result = fetch_populated_submodules(&options,
1388                                                     submodule_prefix,
1389                                                     recurse_submodules,
1390                                                     verbosity < 0,
1391                                                     max_children);
1392                 argv_array_clear(&options);
1393         }
1394
1395         string_list_clear(&list, 0);
1396
1397         close_all_packs();
1398
1399         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1400         if (verbosity < 0)
1401                 argv_array_push(&argv_gc_auto, "--quiet");
1402         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1403         argv_array_clear(&argv_gc_auto);
1404
1405         return result;
1406 }