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

   1 /*
   2  * "git fetch"
   3  */
   4 #include "cache.h"
   5 #include "config.h"
   6 #include "repository.h"
   7 #include "refs.h"
   8 #include "commit.h"
   9 #include "builtin.h"
  10 #include "string-list.h"
  11 #include "remote.h"
  12 #include "transport.h"
  13 #include "run-command.h"
  14 #include "parse-options.h"
  15 #include "sigchain.h"
  16 #include "submodule-config.h"
  17 #include "submodule.h"
  18 #include "connected.h"
  19 #include "argv-array.h"
  20 #include "utf8.h"
  21 #include "packfile.h"
  22
  23 static const char * const builtin_fetch_usage[] = {
  24         N_("git fetch [<options>] [<repository> [<refspec>...]]"),
  25         N_("git fetch [<options>] <group>"),
  26         N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
  27         N_("git fetch --all [<options>]"),
  28         NULL
  29 };
  30
  31 enum {
  32         TAGS_UNSET = 0,
  33         TAGS_DEFAULT = 1,
  34         TAGS_SET = 2
  35 };
  36
  37 static int fetch_prune_config = -1; /* unspecified */
  38 static int prune = -1; /* unspecified */
  39 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
  40
  41 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
  42 static int progress = -1;
  43 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  44 static int max_children = 1;
  45 static enum transport_family family;
  46 static const char *depth;
  47 static const char *deepen_since;
  48 static const char *upload_pack;
  49 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
  50 static struct strbuf default_rla = STRBUF_INIT;
  51 static struct transport *gtransport;
  52 static struct transport *gsecondary;
  53 static const char *submodule_prefix = "";
  54 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  55 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
  56 static int shown_url = 0;
  57 static int refmap_alloc, refmap_nr;
  58 static const char **refmap_array;
  59
  60 static int git_fetch_config(const char *k, const char *v, void *cb)
  61 {
  62         if (!strcmp(k, "fetch.prune")) {
  63                 fetch_prune_config = git_config_bool(k, v);
  64                 return 0;
  65         }
  66
  67         if (!strcmp(k, "submodule.recurse")) {
  68                 int r = git_config_bool(k, v) ?
  69                         RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
  70                 recurse_submodules = r;
  71         }
  72
  73         if (!strcmp(k, "submodule.fetchjobs")) {
  74                 max_children = parse_submodule_fetchjobs(k, v);
  75                 return 0;
  76         } else if (!strcmp(k, "fetch.recursesubmodules")) {
  77                 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
  78                 return 0;
  79         }
  80
  81         return git_default_config(k, v, cb);
  82 }
  83
  84 static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
  85 {
  86         if (!strcmp(var, "submodule.fetchjobs")) {
  87                 max_children = parse_submodule_fetchjobs(var, value);
  88                 return 0;
  89         } else if (!strcmp(var, "fetch.recursesubmodules")) {
  90                 recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
  91                 return 0;
  92         }
  93
  94         return 0;
  95 }
  96
  97 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
  98 {
  99         ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
 100
 101         /*
 102          * "git fetch --refmap='' origin foo"
 103          * can be used to tell the command not to store anywhere
 104          */
 105         if (*arg)
 106                 refmap_array[refmap_nr++] = arg;
 107         return 0;
 108 }
 109
 110 static struct option builtin_fetch_options[] = {
 111         OPT__VERBOSITY(&verbosity),
 112         OPT_BOOL(0, "all", &all,
 113                  N_("fetch from all remotes")),
 114         OPT_BOOL('a', "append", &append,
 115                  N_("append to .git/FETCH_HEAD instead of overwriting")),
 116         OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 117                    N_("path to upload pack on remote end")),
 118         OPT__FORCE(&force, N_("force overwrite of local branch")),
 119         OPT_BOOL('m', "multiple", &multiple,
 120                  N_("fetch from multiple remotes")),
 121         OPT_SET_INT('t', "tags", &tags,
 122                     N_("fetch all tags and associated objects"), TAGS_SET),
 123         OPT_SET_INT('n', NULL, &tags,
 124                     N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 125         OPT_INTEGER('j', "jobs", &max_children,
 126                     N_("number of submodules fetched in parallel")),
 127         OPT_BOOL('p', "prune", &prune,
 128                  N_("prune remote-tracking branches no longer on remote")),
 129         { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
 130                     N_("control recursive fetching of submodules"),
 131                     PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
 132         OPT_BOOL(0, "dry-run", &dry_run,
 133                  N_("dry run")),
 134         OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 135         OPT_BOOL('u', "update-head-ok", &update_head_ok,
 136                     N_("allow updating of HEAD ref")),
 137         OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 138         OPT_STRING(0, "depth", &depth, N_("depth"),
 139                    N_("deepen history of shallow clone")),
 140         OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
 141                    N_("deepen history of shallow repository based on time")),
 142         OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
 143                         N_("deepen history of shallow clone, excluding rev")),
 144         OPT_INTEGER(0, "deepen", &deepen_relative,
 145                     N_("deepen history of shallow clone")),
 146         { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
 147                    N_("convert to a complete repository"),
 148                    PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
 149         { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 150                    N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 151         { OPTION_CALLBACK, 0, "recurse-submodules-default",
 152                    &recurse_submodules_default, N_("on-demand"),
 153                    N_("default for recursive fetching of submodules "
 154                       "(lower priority than config files)"),
 155                    PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
 156         OPT_BOOL(0, "update-shallow", &update_shallow,
 157                  N_("accept refs that update .git/shallow")),
 158         { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
 159           N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
 160         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 161                         TRANSPORT_FAMILY_IPV4),
 162         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 163                         TRANSPORT_FAMILY_IPV6),
 164         OPT_END()
 165 };
 166
 167 static void unlock_pack(void)
 168 {
 169         if (gtransport)
 170                 transport_unlock_pack(gtransport);
 171         if (gsecondary)
 172                 transport_unlock_pack(gsecondary);
 173 }
 174
 175 static void unlock_pack_on_signal(int signo)
 176 {
 177         unlock_pack();
 178         sigchain_pop(signo);
 179         raise(signo);
 180 }
 181
 182 static void add_merge_config(struct ref **head,
 183                            const struct ref *remote_refs,
 184                            struct branch *branch,
 185                            struct ref ***tail)
 186 {
 187         int i;
 188
 189         for (i = 0; i < branch->merge_nr; i++) {
 190                 struct ref *rm, **old_tail = *tail;
 191                 struct refspec refspec;
 192
 193                 for (rm = *head; rm; rm = rm->next) {
 194                         if (branch_merge_matches(branch, i, rm->name)) {
 195                                 rm->fetch_head_status = FETCH_HEAD_MERGE;
 196                                 break;
 197                         }
 198                 }
 199                 if (rm)
 200                         continue;
 201
 202                 /*
 203                  * Not fetched to a remote-tracking branch?  We need to fetch
 204                  * it anyway to allow this branch's "branch.$name.merge"
 205                  * to be honored by 'git pull', but we do not have to
 206                  * fail if branch.$name.merge is misconfigured to point
 207                  * at a nonexisting branch.  If we were indeed called by
 208                  * 'git pull', it will notice the misconfiguration because
 209                  * there is no entry in the resulting FETCH_HEAD marked
 210                  * for merging.
 211                  */
 212                 memset(&refspec, 0, sizeof(refspec));
 213                 refspec.src = branch->merge[i]->src;
 214                 get_fetch_map(remote_refs, &refspec, tail, 1);
 215                 for (rm = *old_tail; rm; rm = rm->next)
 216                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 217         }
 218 }
 219
 220 static int add_existing(const char *refname, const struct object_id *oid,
 221                         int flag, void *cbdata)
 222 {
 223         struct string_list *list = (struct string_list *)cbdata;
 224         struct string_list_item *item = string_list_insert(list, refname);
 225         struct object_id *old_oid = xmalloc(sizeof(*old_oid));
 226
 227         oidcpy(old_oid, oid);
 228         item->util = old_oid;
 229         return 0;
 230 }
 231
 232 static int will_fetch(struct ref **head, const unsigned char *sha1)
 233 {
 234         struct ref *rm = *head;
 235         while (rm) {
 236                 if (!hashcmp(rm->old_oid.hash, sha1))
 237                         return 1;
 238                 rm = rm->next;
 239         }
 240         return 0;
 241 }
 242
 243 static void find_non_local_tags(struct transport *transport,
 244                         struct ref **head,
 245                         struct ref ***tail)
 246 {
 247         struct string_list existing_refs = STRING_LIST_INIT_DUP;
 248         struct string_list remote_refs = STRING_LIST_INIT_NODUP;
 249         const struct ref *ref;
 250         struct string_list_item *item = NULL;
 251
 252         for_each_ref(add_existing, &existing_refs);
 253         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 254                 if (!starts_with(ref->name, "refs/tags/"))
 255                         continue;
 256
 257                 /*
 258                  * The peeled ref always follows the matching base
 259                  * ref, so if we see a peeled ref that we don't want
 260                  * to fetch then we can mark the ref entry in the list
 261                  * as one to ignore by setting util to NULL.
 262                  */
 263                 if (ends_with(ref->name, "^{}")) {
 264                         if (item &&
 265                             !has_object_file_with_flags(&ref->old_oid,
 266                                                         OBJECT_INFO_QUICK) &&
 267                             !will_fetch(head, ref->old_oid.hash) &&
 268                             !has_sha1_file_with_flags(item->util,
 269                                                       OBJECT_INFO_QUICK) &&
 270                             !will_fetch(head, item->util))
 271                                 item->util = NULL;
 272                         item = NULL;
 273                         continue;
 274                 }
 275
 276                 /*
 277                  * If item is non-NULL here, then we previously saw a
 278                  * ref not followed by a peeled reference, so we need
 279                  * to check if it is a lightweight tag that we want to
 280                  * fetch.
 281                  */
 282                 if (item &&
 283                     !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 284                     !will_fetch(head, item->util))
 285                         item->util = NULL;
 286
 287                 item = NULL;
 288
 289                 /* skip duplicates and refs that we already have */
 290                 if (string_list_has_string(&remote_refs, ref->name) ||
 291                     string_list_has_string(&existing_refs, ref->name))
 292                         continue;
 293
 294                 item = string_list_insert(&remote_refs, ref->name);
 295                 item->util = (void *)&ref->old_oid;
 296         }
 297         string_list_clear(&existing_refs, 1);
 298
 299         /*
 300          * We may have a final lightweight tag that needs to be
 301          * checked to see if it needs fetching.
 302          */
 303         if (item &&
 304             !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 305             !will_fetch(head, item->util))
 306                 item->util = NULL;
 307
 308         /*
 309          * For all the tags in the remote_refs string list,
 310          * add them to the list of refs to be fetched
 311          */
 312         for_each_string_list_item(item, &remote_refs) {
 313                 /* Unless we have already decided to ignore this item... */
 314                 if (item->util)
 315                 {
 316                         struct ref *rm = alloc_ref(item->string);
 317                         rm->peer_ref = alloc_ref(item->string);
 318                         oidcpy(&rm->old_oid, item->util);
 319                         **tail = rm;
 320                         *tail = &rm->next;
 321                 }
 322         }
 323
 324         string_list_clear(&remote_refs, 0);
 325 }
 326
 327 static struct ref *get_ref_map(struct transport *transport,
 328                                struct refspec *refspecs, int refspec_count,
 329                                int tags, int *autotags)
 330 {
 331         int i;
 332         struct ref *rm;
 333         struct ref *ref_map = NULL;
 334         struct ref **tail = &ref_map;
 335
 336         /* opportunistically-updated references: */
 337         struct ref *orefs = NULL, **oref_tail = &orefs;
 338
 339         const struct ref *remote_refs = transport_get_remote_refs(transport);
 340
 341         if (refspec_count) {
 342                 struct refspec *fetch_refspec;
 343                 int fetch_refspec_nr;
 344
 345                 for (i = 0; i < refspec_count; i++) {
 346                         get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
 347                         if (refspecs[i].dst && refspecs[i].dst[0])
 348                                 *autotags = 1;
 349                 }
 350                 /* Merge everything on the command line (but not --tags) */
 351                 for (rm = ref_map; rm; rm = rm->next)
 352                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 353
 354                 /*
 355                  * For any refs that we happen to be fetching via
 356                  * command-line arguments, the destination ref might
 357                  * have been missing or have been different than the
 358                  * remote-tracking ref that would be derived from the
 359                  * configured refspec.  In these cases, we want to
 360                  * take the opportunity to update their configured
 361                  * remote-tracking reference.  However, we do not want
 362                  * to mention these entries in FETCH_HEAD at all, as
 363                  * they would simply be duplicates of existing
 364                  * entries, so we set them FETCH_HEAD_IGNORE below.
 365                  *
 366                  * We compute these entries now, based only on the
 367                  * refspecs specified on the command line.  But we add
 368                  * them to the list following the refspecs resulting
 369                  * from the tags option so that one of the latter,
 370                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 371                  * by ref_remove_duplicates() in favor of one of these
 372                  * opportunistic entries with FETCH_HEAD_IGNORE.
 373                  */
 374                 if (refmap_array) {
 375                         fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
 376                         fetch_refspec_nr = refmap_nr;
 377                 } else {
 378                         fetch_refspec = transport->remote->fetch;
 379                         fetch_refspec_nr = transport->remote->fetch_refspec_nr;
 380                 }
 381
 382                 for (i = 0; i < fetch_refspec_nr; i++)
 383                         get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
 384         } else if (refmap_array) {
 385                 die("--refmap option is only meaningful with command-line refspec(s).");
 386         } else {
 387                 /* Use the defaults */
 388                 struct remote *remote = transport->remote;
 389                 struct branch *branch = branch_get(NULL);
 390                 int has_merge = branch_has_merge_config(branch);
 391                 if (remote &&
 392                     (remote->fetch_refspec_nr ||
 393                      /* Note: has_merge implies non-NULL branch->remote_name */
 394                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 395                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 396                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 397                                 if (remote->fetch[i].dst &&
 398                                     remote->fetch[i].dst[0])
 399                                         *autotags = 1;
 400                                 if (!i && !has_merge && ref_map &&
 401                                     !remote->fetch[0].pattern)
 402                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 403                         }
 404                         /*
 405                          * if the remote we're fetching from is the same
 406                          * as given in branch.<name>.remote, we add the
 407                          * ref given in branch.<name>.merge, too.
 408                          *
 409                          * Note: has_merge implies non-NULL branch->remote_name
 410                          */
 411                         if (has_merge &&
 412                             !strcmp(branch->remote_name, remote->name))
 413                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 414                 } else {
 415                         ref_map = get_remote_ref(remote_refs, "HEAD");
 416                         if (!ref_map)
 417                                 die(_("Couldn't find remote ref HEAD"));
 418                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 419                         tail = &ref_map->next;
 420                 }
 421         }
 422
 423         if (tags == TAGS_SET)
 424                 /* also fetch all tags */
 425                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 426         else if (tags == TAGS_DEFAULT && *autotags)
 427                 find_non_local_tags(transport, &ref_map, &tail);
 428
 429         /* Now append any refs to be updated opportunistically: */
 430         *tail = orefs;
 431         for (rm = orefs; rm; rm = rm->next) {
 432                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
 433                 tail = &rm->next;
 434         }
 435
 436         return ref_remove_duplicates(ref_map);
 437 }
 438
 439 #define STORE_REF_ERROR_OTHER 1
 440 #define STORE_REF_ERROR_DF_CONFLICT 2
 441
 442 static int s_update_ref(const char *action,
 443                         struct ref *ref,
 444                         int check_old)
 445 {
 446         char *msg;
 447         char *rla = getenv("GIT_REFLOG_ACTION");
 448         struct ref_transaction *transaction;
 449         struct strbuf err = STRBUF_INIT;
 450         int ret, df_conflict = 0;
 451
 452         if (dry_run)
 453                 return 0;
 454         if (!rla)
 455                 rla = default_rla.buf;
 456         msg = xstrfmt("%s: %s", rla, action);
 457
 458         transaction = ref_transaction_begin(&err);
 459         if (!transaction ||
 460             ref_transaction_update(transaction, ref->name,
 461                                    &ref->new_oid,
 462                                    check_old ? &ref->old_oid : NULL,
 463                                    0, msg, &err))
 464                 goto fail;
 465
 466         ret = ref_transaction_commit(transaction, &err);
 467         if (ret) {
 468                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 469                 goto fail;
 470         }
 471
 472         ref_transaction_free(transaction);
 473         strbuf_release(&err);
 474         free(msg);
 475         return 0;
 476 fail:
 477         ref_transaction_free(transaction);
 478         error("%s", err.buf);
 479         strbuf_release(&err);
 480         free(msg);
 481         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 482                            : STORE_REF_ERROR_OTHER;
 483 }
 484
 485 static int refcol_width = 10;
 486 static int compact_format;
 487
 488 static void adjust_refcol_width(const struct ref *ref)
 489 {
 490         int max, rlen, llen, len;
 491
 492         /* uptodate lines are only shown on high verbosity level */
 493         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 494                 return;
 495
 496         max    = term_columns();
 497         rlen   = utf8_strwidth(prettify_refname(ref->name));
 498
 499         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 500
 501         /*
 502          * rough estimation to see if the output line is too long and
 503          * should not be counted (we can't do precise calculation
 504          * anyway because we don't know if the error explanation part
 505          * will be printed in update_local_ref)
 506          */
 507         if (compact_format) {
 508                 llen = 0;
 509                 max = max * 2 / 3;
 510         }
 511         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 512         if (len >= max)
 513                 return;
 514
 515         /*
 516          * Not precise calculation for compact mode because '*' can
 517          * appear on the left hand side of '->' and shrink the column
 518          * back.
 519          */
 520         if (refcol_width < rlen)
 521                 refcol_width = rlen;
 522 }
 523
 524 static void prepare_format_display(struct ref *ref_map)
 525 {
 526         struct ref *rm;
 527         const char *format = "full";
 528
 529         git_config_get_string_const("fetch.output", &format);
 530         if (!strcasecmp(format, "full"))
 531                 compact_format = 0;
 532         else if (!strcasecmp(format, "compact"))
 533                 compact_format = 1;
 534         else
 535                 die(_("configuration fetch.output contains invalid value %s"),
 536                     format);
 537
 538         for (rm = ref_map; rm; rm = rm->next) {
 539                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 540                     !rm->peer_ref ||
 541                     !strcmp(rm->name, "HEAD"))
 542                         continue;
 543
 544                 adjust_refcol_width(rm);
 545         }
 546 }
 547
 548 static void print_remote_to_local(struct strbuf *display,
 549                                   const char *remote, const char *local)
 550 {
 551         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 552 }
 553
 554 static int find_and_replace(struct strbuf *haystack,
 555                             const char *needle,
 556                             const char *placeholder)
 557 {
 558         const char *p = strstr(haystack->buf, needle);
 559         int plen, nlen;
 560
 561         if (!p)
 562                 return 0;
 563
 564         if (p > haystack->buf && p[-1] != '/')
 565                 return 0;
 566
 567         plen = strlen(p);
 568         nlen = strlen(needle);
 569         if (plen > nlen && p[nlen] != '/')
 570                 return 0;
 571
 572         strbuf_splice(haystack, p - haystack->buf, nlen,
 573                       placeholder, strlen(placeholder));
 574         return 1;
 575 }
 576
 577 static void print_compact(struct strbuf *display,
 578                           const char *remote, const char *local)
 579 {
 580         struct strbuf r = STRBUF_INIT;
 581         struct strbuf l = STRBUF_INIT;
 582
 583         if (!strcmp(remote, local)) {
 584                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 585                 return;
 586         }
 587
 588         strbuf_addstr(&r, remote);
 589         strbuf_addstr(&l, local);
 590
 591         if (!find_and_replace(&r, local, "*"))
 592                 find_and_replace(&l, remote, "*");
 593         print_remote_to_local(display, r.buf, l.buf);
 594
 595         strbuf_release(&r);
 596         strbuf_release(&l);
 597 }
 598
 599 static void format_display(struct strbuf *display, char code,
 600                            const char *summary, const char *error,
 601                            const char *remote, const char *local,
 602                            int summary_width)
 603 {
 604         int width = (summary_width + strlen(summary) - gettext_width(summary));
 605
 606         strbuf_addf(display, "%c %-*s ", code, width, summary);
 607         if (!compact_format)
 608                 print_remote_to_local(display, remote, local);
 609         else
 610                 print_compact(display, remote, local);
 611         if (error)
 612                 strbuf_addf(display, "  (%s)", error);
 613 }
 614
 615 static int update_local_ref(struct ref *ref,
 616                             const char *remote,
 617                             const struct ref *remote_ref,
 618                             struct strbuf *display,
 619                             int summary_width)
 620 {
 621         struct commit *current = NULL, *updated;
 622         enum object_type type;
 623         struct branch *current_branch = branch_get(NULL);
 624         const char *pretty_ref = prettify_refname(ref->name);
 625
 626         type = sha1_object_info(ref->new_oid.hash, NULL);
 627         if (type < 0)
 628                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 629
 630         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 631                 if (verbosity > 0)
 632                         format_display(display, '=', _("[up to date]"), NULL,
 633                                        remote, pretty_ref, summary_width);
 634                 return 0;
 635         }
 636
 637         if (current_branch &&
 638             !strcmp(ref->name, current_branch->name) &&
 639             !(update_head_ok || is_bare_repository()) &&
 640             !is_null_oid(&ref->old_oid)) {
 641                 /*
 642                  * If this is the head, and it's not okay to update
 643                  * the head, and the old value of the head isn't empty...
 644                  */
 645                 format_display(display, '!', _("[rejected]"),
 646                                _("can't fetch in current branch"),
 647                                remote, pretty_ref, summary_width);
 648                 return 1;
 649         }
 650
 651         if (!is_null_oid(&ref->old_oid) &&
 652             starts_with(ref->name, "refs/tags/")) {
 653                 int r;
 654                 r = s_update_ref("updating tag", ref, 0);
 655                 format_display(display, r ? '!' : 't', _("[tag update]"),
 656                                r ? _("unable to update local ref") : NULL,
 657                                remote, pretty_ref, summary_width);
 658                 return r;
 659         }
 660
 661         current = lookup_commit_reference_gently(&ref->old_oid, 1);
 662         updated = lookup_commit_reference_gently(&ref->new_oid, 1);
 663         if (!current || !updated) {
 664                 const char *msg;
 665                 const char *what;
 666                 int r;
 667                 /*
 668                  * Nicely describe the new ref we're fetching.
 669                  * Base this on the remote's ref name, as it's
 670                  * more likely to follow a standard layout.
 671                  */
 672                 const char *name = remote_ref ? remote_ref->name : "";
 673                 if (starts_with(name, "refs/tags/")) {
 674                         msg = "storing tag";
 675                         what = _("[new tag]");
 676                 } else if (starts_with(name, "refs/heads/")) {
 677                         msg = "storing head";
 678                         what = _("[new branch]");
 679                 } else {
 680                         msg = "storing ref";
 681                         what = _("[new ref]");
 682                 }
 683
 684                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 685                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 686                         check_for_new_submodule_commits(&ref->new_oid);
 687                 r = s_update_ref(msg, ref, 0);
 688                 format_display(display, r ? '!' : '*', what,
 689                                r ? _("unable to update local ref") : NULL,
 690                                remote, pretty_ref, summary_width);
 691                 return r;
 692         }
 693
 694         if (in_merge_bases(current, updated)) {
 695                 struct strbuf quickref = STRBUF_INIT;
 696                 int r;
 697                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 698                 strbuf_addstr(&quickref, "..");
 699                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 700                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 701                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 702                         check_for_new_submodule_commits(&ref->new_oid);
 703                 r = s_update_ref("fast-forward", ref, 1);
 704                 format_display(display, r ? '!' : ' ', quickref.buf,
 705                                r ? _("unable to update local ref") : NULL,
 706                                remote, pretty_ref, summary_width);
 707                 strbuf_release(&quickref);
 708                 return r;
 709         } else if (force || ref->force) {
 710                 struct strbuf quickref = STRBUF_INIT;
 711                 int r;
 712                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 713                 strbuf_addstr(&quickref, "...");
 714                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 715                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 716                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 717                         check_for_new_submodule_commits(&ref->new_oid);
 718                 r = s_update_ref("forced-update", ref, 1);
 719                 format_display(display, r ? '!' : '+', quickref.buf,
 720                                r ? _("unable to update local ref") : _("forced update"),
 721                                remote, pretty_ref, summary_width);
 722                 strbuf_release(&quickref);
 723                 return r;
 724         } else {
 725                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 726                                remote, pretty_ref, summary_width);
 727                 return 1;
 728         }
 729 }
 730
 731 static int iterate_ref_map(void *cb_data, struct object_id *oid)
 732 {
 733         struct ref **rm = cb_data;
 734         struct ref *ref = *rm;
 735
 736         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 737                 ref = ref->next;
 738         if (!ref)
 739                 return -1; /* end of the list */
 740         *rm = ref->next;
 741         oidcpy(oid, &ref->old_oid);
 742         return 0;
 743 }
 744
 745 static int store_updated_refs(const char *raw_url, const char *remote_name,
 746                 struct ref *ref_map)
 747 {
 748         FILE *fp;
 749         struct commit *commit;
 750         int url_len, i, rc = 0;
 751         struct strbuf note = STRBUF_INIT;
 752         const char *what, *kind;
 753         struct ref *rm;
 754         char *url;
 755         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 756         int want_status;
 757         int summary_width = transport_summary_width(ref_map);
 758
 759         fp = fopen(filename, "a");
 760         if (!fp)
 761                 return error_errno(_("cannot open %s"), filename);
 762
 763         if (raw_url)
 764                 url = transport_anonymize_url(raw_url);
 765         else
 766                 url = xstrdup("foreign");
 767
 768         rm = ref_map;
 769         if (check_connected(iterate_ref_map, &rm, NULL)) {
 770                 rc = error(_("%s did not send all necessary objects\n"), url);
 771                 goto abort;
 772         }
 773
 774         prepare_format_display(ref_map);
 775
 776         /*
 777          * We do a pass for each fetch_head_status type in their enum order, so
 778          * merged entries are written before not-for-merge. That lets readers
 779          * use FETCH_HEAD as a refname to refer to the ref to be merged.
 780          */
 781         for (want_status = FETCH_HEAD_MERGE;
 782              want_status <= FETCH_HEAD_IGNORE;
 783              want_status++) {
 784                 for (rm = ref_map; rm; rm = rm->next) {
 785                         struct ref *ref = NULL;
 786                         const char *merge_status_marker = "";
 787
 788                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 789                                 if (want_status == FETCH_HEAD_MERGE)
 790                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
 791                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
 792                                 continue;
 793                         }
 794
 795                         commit = lookup_commit_reference_gently(&rm->old_oid,
 796                                                                 1);
 797                         if (!commit)
 798                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 799
 800                         if (rm->fetch_head_status != want_status)
 801                                 continue;
 802
 803                         if (rm->peer_ref) {
 804                                 ref = alloc_ref(rm->peer_ref->name);
 805                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 806                                 oidcpy(&ref->new_oid, &rm->old_oid);
 807                                 ref->force = rm->peer_ref->force;
 808                         }
 809
 810
 811                         if (!strcmp(rm->name, "HEAD")) {
 812                                 kind = "";
 813                                 what = "";
 814                         }
 815                         else if (starts_with(rm->name, "refs/heads/")) {
 816                                 kind = "branch";
 817                                 what = rm->name + 11;
 818                         }
 819                         else if (starts_with(rm->name, "refs/tags/")) {
 820                                 kind = "tag";
 821                                 what = rm->name + 10;
 822                         }
 823                         else if (starts_with(rm->name, "refs/remotes/")) {
 824                                 kind = "remote-tracking branch";
 825                                 what = rm->name + 13;
 826                         }
 827                         else {
 828                                 kind = "";
 829                                 what = rm->name;
 830                         }
 831
 832                         url_len = strlen(url);
 833                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 834                                 ;
 835                         url_len = i + 1;
 836                         if (4 < i && !strncmp(".git", url + i - 3, 4))
 837                                 url_len = i - 3;
 838
 839                         strbuf_reset(&note);
 840                         if (*what) {
 841                                 if (*kind)
 842                                         strbuf_addf(&note, "%s ", kind);
 843                                 strbuf_addf(&note, "'%s' of ", what);
 844                         }
 845                         switch (rm->fetch_head_status) {
 846                         case FETCH_HEAD_NOT_FOR_MERGE:
 847                                 merge_status_marker = "not-for-merge";
 848                                 /* fall-through */
 849                         case FETCH_HEAD_MERGE:
 850                                 fprintf(fp, "%s\t%s\t%s",
 851                                         oid_to_hex(&rm->old_oid),
 852                                         merge_status_marker,
 853                                         note.buf);
 854                                 for (i = 0; i < url_len; ++i)
 855                                         if ('\n' == url[i])
 856                                                 fputs("\\n", fp);
 857                                         else
 858                                                 fputc(url[i], fp);
 859                                 fputc('\n', fp);
 860                                 break;
 861                         default:
 862                                 /* do not write anything to FETCH_HEAD */
 863                                 break;
 864                         }
 865
 866                         strbuf_reset(&note);
 867                         if (ref) {
 868                                 rc |= update_local_ref(ref, what, rm, &note,
 869                                                        summary_width);
 870                                 free(ref);
 871                         } else
 872                                 format_display(&note, '*',
 873                                                *kind ? kind : "branch", NULL,
 874                                                *what ? what : "HEAD",
 875                                                "FETCH_HEAD", summary_width);
 876                         if (note.len) {
 877                                 if (verbosity >= 0 && !shown_url) {
 878                                         fprintf(stderr, _("From %.*s\n"),
 879                                                         url_len, url);
 880                                         shown_url = 1;
 881                                 }
 882                                 if (verbosity >= 0)
 883                                         fprintf(stderr, " %s\n", note.buf);
 884                         }
 885                 }
 886         }
 887
 888         if (rc & STORE_REF_ERROR_DF_CONFLICT)
 889                 error(_("some local refs could not be updated; try running\n"
 890                       " 'git remote prune %s' to remove any old, conflicting "
 891                       "branches"), remote_name);
 892
 893  abort:
 894         strbuf_release(&note);
 895         free(url);
 896         fclose(fp);
 897         return rc;
 898 }
 899
 900 /*
 901  * We would want to bypass the object transfer altogether if
 902  * everything we are going to fetch already exists and is connected
 903  * locally.
 904  */
 905 static int quickfetch(struct ref *ref_map)
 906 {
 907         struct ref *rm = ref_map;
 908         struct check_connected_options opt = CHECK_CONNECTED_INIT;
 909
 910         /*
 911          * If we are deepening a shallow clone we already have these
 912          * objects reachable.  Running rev-list here will return with
 913          * a good (0) exit status and we'll bypass the fetch that we
 914          * really need to perform.  Claiming failure now will ensure
 915          * we perform the network exchange to deepen our history.
 916          */
 917         if (deepen)
 918                 return -1;
 919         opt.quiet = 1;
 920         return check_connected(iterate_ref_map, &rm, &opt);
 921 }
 922
 923 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 924 {
 925         int ret = quickfetch(ref_map);
 926         if (ret)
 927                 ret = transport_fetch_refs(transport, ref_map);
 928         if (!ret)
 929                 ret |= store_updated_refs(transport->url,
 930                                 transport->remote->name,
 931                                 ref_map);
 932         transport_unlock_pack(transport);
 933         return ret;
 934 }
 935
 936 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 937                 const char *raw_url)
 938 {
 939         int url_len, i, result = 0;
 940         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 941         char *url;
 942         int summary_width = transport_summary_width(stale_refs);
 943         const char *dangling_msg = dry_run
 944                 ? _("   (%s will become dangling)")
 945                 : _("   (%s has become dangling)");
 946
 947         if (raw_url)
 948                 url = transport_anonymize_url(raw_url);
 949         else
 950                 url = xstrdup("foreign");
 951
 952         url_len = strlen(url);
 953         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 954                 ;
 955
 956         url_len = i + 1;
 957         if (4 < i && !strncmp(".git", url + i - 3, 4))
 958                 url_len = i - 3;
 959
 960         if (!dry_run) {
 961                 struct string_list refnames = STRING_LIST_INIT_NODUP;
 962
 963                 for (ref = stale_refs; ref; ref = ref->next)
 964                         string_list_append(&refnames, ref->name);
 965
 966                 result = delete_refs("fetch: prune", &refnames, 0);
 967                 string_list_clear(&refnames, 0);
 968         }
 969
 970         if (verbosity >= 0) {
 971                 for (ref = stale_refs; ref; ref = ref->next) {
 972                         struct strbuf sb = STRBUF_INIT;
 973                         if (!shown_url) {
 974                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
 975                                 shown_url = 1;
 976                         }
 977                         format_display(&sb, '-', _("[deleted]"), NULL,
 978                                        _("(none)"), prettify_refname(ref->name),
 979                                        summary_width);
 980                         fprintf(stderr, " %s\n",sb.buf);
 981                         strbuf_release(&sb);
 982                         warn_dangling_symref(stderr, dangling_msg, ref->name);
 983                 }
 984         }
 985
 986         free(url);
 987         free_refs(stale_refs);
 988         return result;
 989 }
 990
 991 static void check_not_current_branch(struct ref *ref_map)
 992 {
 993         struct branch *current_branch = branch_get(NULL);
 994
 995         if (is_bare_repository() || !current_branch)
 996                 return;
 997
 998         for (; ref_map; ref_map = ref_map->next)
 999                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1000                                         ref_map->peer_ref->name))
1001                         die(_("Refusing to fetch into current branch %s "
1002                             "of non-bare repository"), current_branch->refname);
1003 }
1004
1005 static int truncate_fetch_head(void)
1006 {
1007         const char *filename = git_path_fetch_head();
1008         FILE *fp = fopen_for_writing(filename);
1009
1010         if (!fp)
1011                 return error_errno(_("cannot open %s"), filename);
1012         fclose(fp);
1013         return 0;
1014 }
1015
1016 static void set_option(struct transport *transport, const char *name, const char *value)
1017 {
1018         int r = transport_set_option(transport, name, value);
1019         if (r < 0)
1020                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1021                     name, value, transport->url);
1022         if (r > 0)
1023                 warning(_("Option \"%s\" is ignored for %s\n"),
1024                         name, transport->url);
1025 }
1026
1027 static struct transport *prepare_transport(struct remote *remote, int deepen)
1028 {
1029         struct transport *transport;
1030         transport = transport_get(remote, NULL);
1031         transport_set_verbosity(transport, verbosity, progress);
1032         transport->family = family;
1033         if (upload_pack)
1034                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1035         if (keep)
1036                 set_option(transport, TRANS_OPT_KEEP, "yes");
1037         if (depth)
1038                 set_option(transport, TRANS_OPT_DEPTH, depth);
1039         if (deepen && deepen_since)
1040                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1041         if (deepen && deepen_not.nr)
1042                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1043                            (const char *)&deepen_not);
1044         if (deepen_relative)
1045                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1046         if (update_shallow)
1047                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1048         return transport;
1049 }
1050
1051 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1052 {
1053         int cannot_reuse;
1054
1055         /*
1056          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1057          * when remote helper is used (setting it to an empty string
1058          * is not unsetting). We could extend the remote helper
1059          * protocol for that, but for now, just force a new connection
1060          * without deepen-since. Similar story for deepen-not.
1061          */
1062         cannot_reuse = transport->cannot_reuse ||
1063                 deepen_since || deepen_not.nr;
1064         if (cannot_reuse) {
1065                 gsecondary = prepare_transport(transport->remote, 0);
1066                 transport = gsecondary;
1067         }
1068
1069         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1070         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1071         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1072         fetch_refs(transport, ref_map);
1073
1074         if (gsecondary) {
1075                 transport_disconnect(gsecondary);
1076                 gsecondary = NULL;
1077         }
1078 }
1079
1080 static int do_fetch(struct transport *transport,
1081                     struct refspec *refs, int ref_count)
1082 {
1083         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1084         struct ref *ref_map;
1085         struct ref *rm;
1086         int autotags = (transport->remote->fetch_tags == 1);
1087         int retcode = 0;
1088
1089         for_each_ref(add_existing, &existing_refs);
1090
1091         if (tags == TAGS_DEFAULT) {
1092                 if (transport->remote->fetch_tags == 2)
1093                         tags = TAGS_SET;
1094                 if (transport->remote->fetch_tags == -1)
1095                         tags = TAGS_UNSET;
1096         }
1097
1098         if (!transport->get_refs_list || !transport->fetch)
1099                 die(_("Don't know how to fetch from %s"), transport->url);
1100
1101         /* if not appending, truncate FETCH_HEAD */
1102         if (!append && !dry_run) {
1103                 retcode = truncate_fetch_head();
1104                 if (retcode)
1105                         goto cleanup;
1106         }
1107
1108         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1109         if (!update_head_ok)
1110                 check_not_current_branch(ref_map);
1111
1112         for (rm = ref_map; rm; rm = rm->next) {
1113                 if (rm->peer_ref) {
1114                         struct string_list_item *peer_item =
1115                                 string_list_lookup(&existing_refs,
1116                                                    rm->peer_ref->name);
1117                         if (peer_item) {
1118                                 struct object_id *old_oid = peer_item->util;
1119                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1120                         }
1121                 }
1122         }
1123
1124         if (tags == TAGS_DEFAULT && autotags)
1125                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1126         if (prune) {
1127                 /*
1128                  * We only prune based on refspecs specified
1129                  * explicitly (via command line or configuration); we
1130                  * don't care whether --tags was specified.
1131                  */
1132                 if (ref_count) {
1133                         prune_refs(refs, ref_count, ref_map, transport->url);
1134                 } else {
1135                         prune_refs(transport->remote->fetch,
1136                                    transport->remote->fetch_refspec_nr,
1137                                    ref_map,
1138                                    transport->url);
1139                 }
1140         }
1141         if (fetch_refs(transport, ref_map)) {
1142                 free_refs(ref_map);
1143                 retcode = 1;
1144                 goto cleanup;
1145         }
1146         free_refs(ref_map);
1147
1148         /* if neither --no-tags nor --tags was specified, do automated tag
1149          * following ... */
1150         if (tags == TAGS_DEFAULT && autotags) {
1151                 struct ref **tail = &ref_map;
1152                 ref_map = NULL;
1153                 find_non_local_tags(transport, &ref_map, &tail);
1154                 if (ref_map)
1155                         backfill_tags(transport, ref_map);
1156                 free_refs(ref_map);
1157         }
1158
1159  cleanup:
1160         string_list_clear(&existing_refs, 1);
1161         return retcode;
1162 }
1163
1164 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1165 {
1166         struct string_list *list = priv;
1167         if (!remote->skip_default_update)
1168                 string_list_append(list, remote->name);
1169         return 0;
1170 }
1171
1172 struct remote_group_data {
1173         const char *name;
1174         struct string_list *list;
1175 };
1176
1177 static int get_remote_group(const char *key, const char *value, void *priv)
1178 {
1179         struct remote_group_data *g = priv;
1180
1181         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1182                 /* split list by white space */
1183                 while (*value) {
1184                         size_t wordlen = strcspn(value, " \t\n");
1185
1186                         if (wordlen >= 1)
1187                                 string_list_append_nodup(g->list,
1188                                                    xstrndup(value, wordlen));
1189                         value += wordlen + (value[wordlen] != '\0');
1190                 }
1191         }
1192
1193         return 0;
1194 }
1195
1196 static int add_remote_or_group(const char *name, struct string_list *list)
1197 {
1198         int prev_nr = list->nr;
1199         struct remote_group_data g;
1200         g.name = name; g.list = list;
1201
1202         git_config(get_remote_group, &g);
1203         if (list->nr == prev_nr) {
1204                 struct remote *remote = remote_get(name);
1205                 if (!remote_is_configured(remote, 0))
1206                         return 0;
1207                 string_list_append(list, remote->name);
1208         }
1209         return 1;
1210 }
1211
1212 static void add_options_to_argv(struct argv_array *argv)
1213 {
1214         if (dry_run)
1215                 argv_array_push(argv, "--dry-run");
1216         if (prune != -1)
1217                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1218         if (update_head_ok)
1219                 argv_array_push(argv, "--update-head-ok");
1220         if (force)
1221                 argv_array_push(argv, "--force");
1222         if (keep)
1223                 argv_array_push(argv, "--keep");
1224         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1225                 argv_array_push(argv, "--recurse-submodules");
1226         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1227                 argv_array_push(argv, "--recurse-submodules=on-demand");
1228         if (tags == TAGS_SET)
1229                 argv_array_push(argv, "--tags");
1230         else if (tags == TAGS_UNSET)
1231                 argv_array_push(argv, "--no-tags");
1232         if (verbosity >= 2)
1233                 argv_array_push(argv, "-v");
1234         if (verbosity >= 1)
1235                 argv_array_push(argv, "-v");
1236         else if (verbosity < 0)
1237                 argv_array_push(argv, "-q");
1238
1239 }
1240
1241 static int fetch_multiple(struct string_list *list)
1242 {
1243         int i, result = 0;
1244         struct argv_array argv = ARGV_ARRAY_INIT;
1245
1246         if (!append && !dry_run) {
1247                 int errcode = truncate_fetch_head();
1248                 if (errcode)
1249                         return errcode;
1250         }
1251
1252         argv_array_pushl(&argv, "fetch", "--append", NULL);
1253         add_options_to_argv(&argv);
1254
1255         for (i = 0; i < list->nr; i++) {
1256                 const char *name = list->items[i].string;
1257                 argv_array_push(&argv, name);
1258                 if (verbosity >= 0)
1259                         printf(_("Fetching %s\n"), name);
1260                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1261                         error(_("Could not fetch %s"), name);
1262                         result = 1;
1263                 }
1264                 argv_array_pop(&argv);
1265         }
1266
1267         argv_array_clear(&argv);
1268         return result;
1269 }
1270
1271 static int fetch_one(struct remote *remote, int argc, const char **argv)
1272 {
1273         static const char **refs = NULL;
1274         struct refspec *refspec;
1275         int ref_nr = 0;
1276         int exit_code;
1277
1278         if (!remote)
1279                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1280                     "remote name from which new revisions should be fetched."));
1281
1282         gtransport = prepare_transport(remote, 1);
1283
1284         if (prune < 0) {
1285                 /* no command line request */
1286                 if (0 <= gtransport->remote->prune)
1287                         prune = gtransport->remote->prune;
1288                 else if (0 <= fetch_prune_config)
1289                         prune = fetch_prune_config;
1290                 else
1291                         prune = PRUNE_BY_DEFAULT;
1292         }
1293
1294         if (argc > 0) {
1295                 int j = 0;
1296                 int i;
1297                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1298                 for (i = 0; i < argc; i++) {
1299                         if (!strcmp(argv[i], "tag")) {
1300                                 i++;
1301                                 if (i >= argc)
1302                                         die(_("You need to specify a tag name."));
1303                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1304                                                     argv[i], argv[i]);
1305                         } else
1306                                 refs[j++] = argv[i];
1307                 }
1308                 refs[j] = NULL;
1309                 ref_nr = j;
1310         }
1311
1312         sigchain_push_common(unlock_pack_on_signal);
1313         atexit(unlock_pack);
1314         refspec = parse_fetch_refspec(ref_nr, refs);
1315         exit_code = do_fetch(gtransport, refspec, ref_nr);
1316         free_refspec(ref_nr, refspec);
1317         transport_disconnect(gtransport);
1318         gtransport = NULL;
1319         return exit_code;
1320 }
1321
1322 int cmd_fetch(int argc, const char **argv, const char *prefix)
1323 {
1324         int i;
1325         struct string_list list = STRING_LIST_INIT_DUP;
1326         struct remote *remote;
1327         int result = 0;
1328         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1329
1330         packet_trace_identity("fetch");
1331
1332         /* Record the command line for the reflog */
1333         strbuf_addstr(&default_rla, "fetch");
1334         for (i = 1; i < argc; i++)
1335                 strbuf_addf(&default_rla, " %s", argv[i]);
1336
1337         config_from_gitmodules(gitmodules_fetch_config, NULL);
1338         git_config(git_fetch_config, NULL);
1339
1340         argc = parse_options(argc, argv, prefix,
1341                              builtin_fetch_options, builtin_fetch_usage, 0);
1342
1343         if (deepen_relative) {
1344                 if (deepen_relative < 0)
1345                         die(_("Negative depth in --deepen is not supported"));
1346                 if (depth)
1347                         die(_("--deepen and --depth are mutually exclusive"));
1348                 depth = xstrfmt("%d", deepen_relative);
1349         }
1350         if (unshallow) {
1351                 if (depth)
1352                         die(_("--depth and --unshallow cannot be used together"));
1353                 else if (!is_repository_shallow())
1354                         die(_("--unshallow on a complete repository does not make sense"));
1355                 else
1356                         depth = xstrfmt("%d", INFINITE_DEPTH);
1357         }
1358
1359         /* no need to be strict, transport_set_option() will validate it again */
1360         if (depth && atoi(depth) < 1)
1361                 die(_("depth %s is not a positive number"), depth);
1362         if (depth || deepen_since || deepen_not.nr)
1363                 deepen = 1;
1364
1365         if (all) {
1366                 if (argc == 1)
1367                         die(_("fetch --all does not take a repository argument"));
1368                 else if (argc > 1)
1369                         die(_("fetch --all does not make sense with refspecs"));
1370                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1371                 result = fetch_multiple(&list);
1372         } else if (argc == 0) {
1373                 /* No arguments -- use default remote */
1374                 remote = remote_get(NULL);
1375                 result = fetch_one(remote, argc, argv);
1376         } else if (multiple) {
1377                 /* All arguments are assumed to be remotes or groups */
1378                 for (i = 0; i < argc; i++)
1379                         if (!add_remote_or_group(argv[i], &list))
1380                                 die(_("No such remote or remote group: %s"), argv[i]);
1381                 result = fetch_multiple(&list);
1382         } else {
1383                 /* Single remote or group */
1384                 (void) add_remote_or_group(argv[0], &list);
1385                 if (list.nr > 1) {
1386                         /* More than one remote */
1387                         if (argc > 1)
1388                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1389                         result = fetch_multiple(&list);
1390                 } else {
1391                         /* Zero or one remotes */
1392                         remote = remote_get(argv[0]);
1393                         result = fetch_one(remote, argc-1, argv+1);
1394                 }
1395         }
1396
1397         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1398                 struct argv_array options = ARGV_ARRAY_INIT;
1399
1400                 add_options_to_argv(&options);
1401                 result = fetch_populated_submodules(the_repository,
1402                                                     &options,
1403                                                     submodule_prefix,
1404                                                     recurse_submodules,
1405                                                     recurse_submodules_default,
1406                                                     verbosity < 0,
1407                                                     max_children);
1408                 argv_array_clear(&options);
1409         }
1410
1411         string_list_clear(&list, 0);
1412
1413         close_all_packs();
1414
1415         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1416         if (verbosity < 0)
1417                 argv_array_push(&argv_gc_auto, "--quiet");
1418         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1419         argv_array_clear(&argv_gc_auto);
1420
1421         return result;
1422 }