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 fetch_prune_tags_config = -1; /* unspecified */
  42 static int prune_tags = -1; /* unspecified */
  43 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
  44
  45 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
  46 static int progress = -1;
  47 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  48 static int max_children = 1;
  49 static enum transport_family family;
  50 static const char *depth;
  51 static const char *deepen_since;
  52 static const char *upload_pack;
  53 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
  54 static struct strbuf default_rla = STRBUF_INIT;
  55 static struct transport *gtransport;
  56 static struct transport *gsecondary;
  57 static const char *submodule_prefix = "";
  58 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  59 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
  60 static int shown_url = 0;
  61 static int refmap_alloc, refmap_nr;
  62 static const char **refmap_array;
  63
  64 static int git_fetch_config(const char *k, const char *v, void *cb)
  65 {
  66         if (!strcmp(k, "fetch.prune")) {
  67                 fetch_prune_config = git_config_bool(k, v);
  68                 return 0;
  69         }
  70
  71         if (!strcmp(k, "fetch.prunetags")) {
  72                 fetch_prune_tags_config = git_config_bool(k, v);
  73                 return 0;
  74         }
  75
  76         if (!strcmp(k, "submodule.recurse")) {
  77                 int r = git_config_bool(k, v) ?
  78                         RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
  79                 recurse_submodules = r;
  80         }
  81
  82         if (!strcmp(k, "submodule.fetchjobs")) {
  83                 max_children = parse_submodule_fetchjobs(k, v);
  84                 return 0;
  85         } else if (!strcmp(k, "fetch.recursesubmodules")) {
  86                 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
  87                 return 0;
  88         }
  89
  90         return git_default_config(k, v, cb);
  91 }
  92
  93 static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
  94 {
  95         if (!strcmp(var, "submodule.fetchjobs")) {
  96                 max_children = parse_submodule_fetchjobs(var, value);
  97                 return 0;
  98         } else if (!strcmp(var, "fetch.recursesubmodules")) {
  99                 recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
 100                 return 0;
 101         }
 102
 103         return 0;
 104 }
 105
 106 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
 107 {
 108         ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
 109
 110         /*
 111          * "git fetch --refmap='' origin foo"
 112          * can be used to tell the command not to store anywhere
 113          */
 114         if (*arg)
 115                 refmap_array[refmap_nr++] = arg;
 116         return 0;
 117 }
 118
 119 static struct option builtin_fetch_options[] = {
 120         OPT__VERBOSITY(&verbosity),
 121         OPT_BOOL(0, "all", &all,
 122                  N_("fetch from all remotes")),
 123         OPT_BOOL('a', "append", &append,
 124                  N_("append to .git/FETCH_HEAD instead of overwriting")),
 125         OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 126                    N_("path to upload pack on remote end")),
 127         OPT__FORCE(&force, N_("force overwrite of local branch")),
 128         OPT_BOOL('m', "multiple", &multiple,
 129                  N_("fetch from multiple remotes")),
 130         OPT_SET_INT('t', "tags", &tags,
 131                     N_("fetch all tags and associated objects"), TAGS_SET),
 132         OPT_SET_INT('n', NULL, &tags,
 133                     N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 134         OPT_INTEGER('j', "jobs", &max_children,
 135                     N_("number of submodules fetched in parallel")),
 136         OPT_BOOL('p', "prune", &prune,
 137                  N_("prune remote-tracking branches no longer on remote")),
 138         OPT_BOOL('P', "prune-tags", &prune_tags,
 139                  N_("prune local tags no longer on remote and clobber changed tags")),
 140         { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
 141                     N_("control recursive fetching of submodules"),
 142                     PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
 143         OPT_BOOL(0, "dry-run", &dry_run,
 144                  N_("dry run")),
 145         OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 146         OPT_BOOL('u', "update-head-ok", &update_head_ok,
 147                     N_("allow updating of HEAD ref")),
 148         OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 149         OPT_STRING(0, "depth", &depth, N_("depth"),
 150                    N_("deepen history of shallow clone")),
 151         OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
 152                    N_("deepen history of shallow repository based on time")),
 153         OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
 154                         N_("deepen history of shallow clone, excluding rev")),
 155         OPT_INTEGER(0, "deepen", &deepen_relative,
 156                     N_("deepen history of shallow clone")),
 157         { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
 158                    N_("convert to a complete repository"),
 159                    PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
 160         { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 161                    N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 162         { OPTION_CALLBACK, 0, "recurse-submodules-default",
 163                    &recurse_submodules_default, N_("on-demand"),
 164                    N_("default for recursive fetching of submodules "
 165                       "(lower priority than config files)"),
 166                    PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
 167         OPT_BOOL(0, "update-shallow", &update_shallow,
 168                  N_("accept refs that update .git/shallow")),
 169         { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
 170           N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
 171         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 172                         TRANSPORT_FAMILY_IPV4),
 173         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 174                         TRANSPORT_FAMILY_IPV6),
 175         OPT_END()
 176 };
 177
 178 static void unlock_pack(void)
 179 {
 180         if (gtransport)
 181                 transport_unlock_pack(gtransport);
 182         if (gsecondary)
 183                 transport_unlock_pack(gsecondary);
 184 }
 185
 186 static void unlock_pack_on_signal(int signo)
 187 {
 188         unlock_pack();
 189         sigchain_pop(signo);
 190         raise(signo);
 191 }
 192
 193 static void add_merge_config(struct ref **head,
 194                            const struct ref *remote_refs,
 195                            struct branch *branch,
 196                            struct ref ***tail)
 197 {
 198         int i;
 199
 200         for (i = 0; i < branch->merge_nr; i++) {
 201                 struct ref *rm, **old_tail = *tail;
 202                 struct refspec refspec;
 203
 204                 for (rm = *head; rm; rm = rm->next) {
 205                         if (branch_merge_matches(branch, i, rm->name)) {
 206                                 rm->fetch_head_status = FETCH_HEAD_MERGE;
 207                                 break;
 208                         }
 209                 }
 210                 if (rm)
 211                         continue;
 212
 213                 /*
 214                  * Not fetched to a remote-tracking branch?  We need to fetch
 215                  * it anyway to allow this branch's "branch.$name.merge"
 216                  * to be honored by 'git pull', but we do not have to
 217                  * fail if branch.$name.merge is misconfigured to point
 218                  * at a nonexisting branch.  If we were indeed called by
 219                  * 'git pull', it will notice the misconfiguration because
 220                  * there is no entry in the resulting FETCH_HEAD marked
 221                  * for merging.
 222                  */
 223                 memset(&refspec, 0, sizeof(refspec));
 224                 refspec.src = branch->merge[i]->src;
 225                 get_fetch_map(remote_refs, &refspec, tail, 1);
 226                 for (rm = *old_tail; rm; rm = rm->next)
 227                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 228         }
 229 }
 230
 231 static int add_existing(const char *refname, const struct object_id *oid,
 232                         int flag, void *cbdata)
 233 {
 234         struct string_list *list = (struct string_list *)cbdata;
 235         struct string_list_item *item = string_list_insert(list, refname);
 236         struct object_id *old_oid = xmalloc(sizeof(*old_oid));
 237
 238         oidcpy(old_oid, oid);
 239         item->util = old_oid;
 240         return 0;
 241 }
 242
 243 static int will_fetch(struct ref **head, const unsigned char *sha1)
 244 {
 245         struct ref *rm = *head;
 246         while (rm) {
 247                 if (!hashcmp(rm->old_oid.hash, sha1))
 248                         return 1;
 249                 rm = rm->next;
 250         }
 251         return 0;
 252 }
 253
 254 static void find_non_local_tags(struct transport *transport,
 255                         struct ref **head,
 256                         struct ref ***tail)
 257 {
 258         struct string_list existing_refs = STRING_LIST_INIT_DUP;
 259         struct string_list remote_refs = STRING_LIST_INIT_NODUP;
 260         const struct ref *ref;
 261         struct string_list_item *item = NULL;
 262
 263         for_each_ref(add_existing, &existing_refs);
 264         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 265                 if (!starts_with(ref->name, "refs/tags/"))
 266                         continue;
 267
 268                 /*
 269                  * The peeled ref always follows the matching base
 270                  * ref, so if we see a peeled ref that we don't want
 271                  * to fetch then we can mark the ref entry in the list
 272                  * as one to ignore by setting util to NULL.
 273                  */
 274                 if (ends_with(ref->name, "^{}")) {
 275                         if (item &&
 276                             !has_object_file_with_flags(&ref->old_oid,
 277                                                         OBJECT_INFO_QUICK) &&
 278                             !will_fetch(head, ref->old_oid.hash) &&
 279                             !has_sha1_file_with_flags(item->util,
 280                                                       OBJECT_INFO_QUICK) &&
 281                             !will_fetch(head, item->util))
 282                                 item->util = NULL;
 283                         item = NULL;
 284                         continue;
 285                 }
 286
 287                 /*
 288                  * If item is non-NULL here, then we previously saw a
 289                  * ref not followed by a peeled reference, so we need
 290                  * to check if it is a lightweight tag that we want to
 291                  * fetch.
 292                  */
 293                 if (item &&
 294                     !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 295                     !will_fetch(head, item->util))
 296                         item->util = NULL;
 297
 298                 item = NULL;
 299
 300                 /* skip duplicates and refs that we already have */
 301                 if (string_list_has_string(&remote_refs, ref->name) ||
 302                     string_list_has_string(&existing_refs, ref->name))
 303                         continue;
 304
 305                 item = string_list_insert(&remote_refs, ref->name);
 306                 item->util = (void *)&ref->old_oid;
 307         }
 308         string_list_clear(&existing_refs, 1);
 309
 310         /*
 311          * We may have a final lightweight tag that needs to be
 312          * checked to see if it needs fetching.
 313          */
 314         if (item &&
 315             !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 316             !will_fetch(head, item->util))
 317                 item->util = NULL;
 318
 319         /*
 320          * For all the tags in the remote_refs string list,
 321          * add them to the list of refs to be fetched
 322          */
 323         for_each_string_list_item(item, &remote_refs) {
 324                 /* Unless we have already decided to ignore this item... */
 325                 if (item->util)
 326                 {
 327                         struct ref *rm = alloc_ref(item->string);
 328                         rm->peer_ref = alloc_ref(item->string);
 329                         oidcpy(&rm->old_oid, item->util);
 330                         **tail = rm;
 331                         *tail = &rm->next;
 332                 }
 333         }
 334
 335         string_list_clear(&remote_refs, 0);
 336 }
 337
 338 static struct ref *get_ref_map(struct transport *transport,
 339                                struct refspec *refspecs, int refspec_count,
 340                                int tags, int *autotags)
 341 {
 342         int i;
 343         struct ref *rm;
 344         struct ref *ref_map = NULL;
 345         struct ref **tail = &ref_map;
 346
 347         /* opportunistically-updated references: */
 348         struct ref *orefs = NULL, **oref_tail = &orefs;
 349
 350         const struct ref *remote_refs = transport_get_remote_refs(transport);
 351
 352         if (refspec_count) {
 353                 struct refspec *fetch_refspec;
 354                 int fetch_refspec_nr;
 355
 356                 for (i = 0; i < refspec_count; i++) {
 357                         get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
 358                         if (refspecs[i].dst && refspecs[i].dst[0])
 359                                 *autotags = 1;
 360                 }
 361                 /* Merge everything on the command line (but not --tags) */
 362                 for (rm = ref_map; rm; rm = rm->next)
 363                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 364
 365                 /*
 366                  * For any refs that we happen to be fetching via
 367                  * command-line arguments, the destination ref might
 368                  * have been missing or have been different than the
 369                  * remote-tracking ref that would be derived from the
 370                  * configured refspec.  In these cases, we want to
 371                  * take the opportunity to update their configured
 372                  * remote-tracking reference.  However, we do not want
 373                  * to mention these entries in FETCH_HEAD at all, as
 374                  * they would simply be duplicates of existing
 375                  * entries, so we set them FETCH_HEAD_IGNORE below.
 376                  *
 377                  * We compute these entries now, based only on the
 378                  * refspecs specified on the command line.  But we add
 379                  * them to the list following the refspecs resulting
 380                  * from the tags option so that one of the latter,
 381                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 382                  * by ref_remove_duplicates() in favor of one of these
 383                  * opportunistic entries with FETCH_HEAD_IGNORE.
 384                  */
 385                 if (refmap_array) {
 386                         fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
 387                         fetch_refspec_nr = refmap_nr;
 388                 } else {
 389                         fetch_refspec = transport->remote->fetch;
 390                         fetch_refspec_nr = transport->remote->fetch_refspec_nr;
 391                 }
 392
 393                 for (i = 0; i < fetch_refspec_nr; i++)
 394                         get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
 395         } else if (refmap_array) {
 396                 die("--refmap option is only meaningful with command-line refspec(s).");
 397         } else {
 398                 /* Use the defaults */
 399                 struct remote *remote = transport->remote;
 400                 struct branch *branch = branch_get(NULL);
 401                 int has_merge = branch_has_merge_config(branch);
 402                 if (remote &&
 403                     (remote->fetch_refspec_nr ||
 404                      /* Note: has_merge implies non-NULL branch->remote_name */
 405                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 406                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 407                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 408                                 if (remote->fetch[i].dst &&
 409                                     remote->fetch[i].dst[0])
 410                                         *autotags = 1;
 411                                 if (!i && !has_merge && ref_map &&
 412                                     !remote->fetch[0].pattern)
 413                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 414                         }
 415                         /*
 416                          * if the remote we're fetching from is the same
 417                          * as given in branch.<name>.remote, we add the
 418                          * ref given in branch.<name>.merge, too.
 419                          *
 420                          * Note: has_merge implies non-NULL branch->remote_name
 421                          */
 422                         if (has_merge &&
 423                             !strcmp(branch->remote_name, remote->name))
 424                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 425                 } else {
 426                         ref_map = get_remote_ref(remote_refs, "HEAD");
 427                         if (!ref_map)
 428                                 die(_("Couldn't find remote ref HEAD"));
 429                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 430                         tail = &ref_map->next;
 431                 }
 432         }
 433
 434         if (tags == TAGS_SET)
 435                 /* also fetch all tags */
 436                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 437         else if (tags == TAGS_DEFAULT && *autotags)
 438                 find_non_local_tags(transport, &ref_map, &tail);
 439
 440         /* Now append any refs to be updated opportunistically: */
 441         *tail = orefs;
 442         for (rm = orefs; rm; rm = rm->next) {
 443                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
 444                 tail = &rm->next;
 445         }
 446
 447         return ref_remove_duplicates(ref_map);
 448 }
 449
 450 #define STORE_REF_ERROR_OTHER 1
 451 #define STORE_REF_ERROR_DF_CONFLICT 2
 452
 453 static int s_update_ref(const char *action,
 454                         struct ref *ref,
 455                         int check_old)
 456 {
 457         char *msg;
 458         char *rla = getenv("GIT_REFLOG_ACTION");
 459         struct ref_transaction *transaction;
 460         struct strbuf err = STRBUF_INIT;
 461         int ret, df_conflict = 0;
 462
 463         if (dry_run)
 464                 return 0;
 465         if (!rla)
 466                 rla = default_rla.buf;
 467         msg = xstrfmt("%s: %s", rla, action);
 468
 469         transaction = ref_transaction_begin(&err);
 470         if (!transaction ||
 471             ref_transaction_update(transaction, ref->name,
 472                                    &ref->new_oid,
 473                                    check_old ? &ref->old_oid : NULL,
 474                                    0, msg, &err))
 475                 goto fail;
 476
 477         ret = ref_transaction_commit(transaction, &err);
 478         if (ret) {
 479                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 480                 goto fail;
 481         }
 482
 483         ref_transaction_free(transaction);
 484         strbuf_release(&err);
 485         free(msg);
 486         return 0;
 487 fail:
 488         ref_transaction_free(transaction);
 489         error("%s", err.buf);
 490         strbuf_release(&err);
 491         free(msg);
 492         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 493                            : STORE_REF_ERROR_OTHER;
 494 }
 495
 496 static int refcol_width = 10;
 497 static int compact_format;
 498
 499 static void adjust_refcol_width(const struct ref *ref)
 500 {
 501         int max, rlen, llen, len;
 502
 503         /* uptodate lines are only shown on high verbosity level */
 504         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 505                 return;
 506
 507         max    = term_columns();
 508         rlen   = utf8_strwidth(prettify_refname(ref->name));
 509
 510         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 511
 512         /*
 513          * rough estimation to see if the output line is too long and
 514          * should not be counted (we can't do precise calculation
 515          * anyway because we don't know if the error explanation part
 516          * will be printed in update_local_ref)
 517          */
 518         if (compact_format) {
 519                 llen = 0;
 520                 max = max * 2 / 3;
 521         }
 522         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 523         if (len >= max)
 524                 return;
 525
 526         /*
 527          * Not precise calculation for compact mode because '*' can
 528          * appear on the left hand side of '->' and shrink the column
 529          * back.
 530          */
 531         if (refcol_width < rlen)
 532                 refcol_width = rlen;
 533 }
 534
 535 static void prepare_format_display(struct ref *ref_map)
 536 {
 537         struct ref *rm;
 538         const char *format = "full";
 539
 540         git_config_get_string_const("fetch.output", &format);
 541         if (!strcasecmp(format, "full"))
 542                 compact_format = 0;
 543         else if (!strcasecmp(format, "compact"))
 544                 compact_format = 1;
 545         else
 546                 die(_("configuration fetch.output contains invalid value %s"),
 547                     format);
 548
 549         for (rm = ref_map; rm; rm = rm->next) {
 550                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 551                     !rm->peer_ref ||
 552                     !strcmp(rm->name, "HEAD"))
 553                         continue;
 554
 555                 adjust_refcol_width(rm);
 556         }
 557 }
 558
 559 static void print_remote_to_local(struct strbuf *display,
 560                                   const char *remote, const char *local)
 561 {
 562         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 563 }
 564
 565 static int find_and_replace(struct strbuf *haystack,
 566                             const char *needle,
 567                             const char *placeholder)
 568 {
 569         const char *p = strstr(haystack->buf, needle);
 570         int plen, nlen;
 571
 572         if (!p)
 573                 return 0;
 574
 575         if (p > haystack->buf && p[-1] != '/')
 576                 return 0;
 577
 578         plen = strlen(p);
 579         nlen = strlen(needle);
 580         if (plen > nlen && p[nlen] != '/')
 581                 return 0;
 582
 583         strbuf_splice(haystack, p - haystack->buf, nlen,
 584                       placeholder, strlen(placeholder));
 585         return 1;
 586 }
 587
 588 static void print_compact(struct strbuf *display,
 589                           const char *remote, const char *local)
 590 {
 591         struct strbuf r = STRBUF_INIT;
 592         struct strbuf l = STRBUF_INIT;
 593
 594         if (!strcmp(remote, local)) {
 595                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 596                 return;
 597         }
 598
 599         strbuf_addstr(&r, remote);
 600         strbuf_addstr(&l, local);
 601
 602         if (!find_and_replace(&r, local, "*"))
 603                 find_and_replace(&l, remote, "*");
 604         print_remote_to_local(display, r.buf, l.buf);
 605
 606         strbuf_release(&r);
 607         strbuf_release(&l);
 608 }
 609
 610 static void format_display(struct strbuf *display, char code,
 611                            const char *summary, const char *error,
 612                            const char *remote, const char *local,
 613                            int summary_width)
 614 {
 615         int width = (summary_width + strlen(summary) - gettext_width(summary));
 616
 617         strbuf_addf(display, "%c %-*s ", code, width, summary);
 618         if (!compact_format)
 619                 print_remote_to_local(display, remote, local);
 620         else
 621                 print_compact(display, remote, local);
 622         if (error)
 623                 strbuf_addf(display, "  (%s)", error);
 624 }
 625
 626 static int update_local_ref(struct ref *ref,
 627                             const char *remote,
 628                             const struct ref *remote_ref,
 629                             struct strbuf *display,
 630                             int summary_width)
 631 {
 632         struct commit *current = NULL, *updated;
 633         enum object_type type;
 634         struct branch *current_branch = branch_get(NULL);
 635         const char *pretty_ref = prettify_refname(ref->name);
 636
 637         type = sha1_object_info(ref->new_oid.hash, NULL);
 638         if (type < 0)
 639                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 640
 641         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 642                 if (verbosity > 0)
 643                         format_display(display, '=', _("[up to date]"), NULL,
 644                                        remote, pretty_ref, summary_width);
 645                 return 0;
 646         }
 647
 648         if (current_branch &&
 649             !strcmp(ref->name, current_branch->name) &&
 650             !(update_head_ok || is_bare_repository()) &&
 651             !is_null_oid(&ref->old_oid)) {
 652                 /*
 653                  * If this is the head, and it's not okay to update
 654                  * the head, and the old value of the head isn't empty...
 655                  */
 656                 format_display(display, '!', _("[rejected]"),
 657                                _("can't fetch in current branch"),
 658                                remote, pretty_ref, summary_width);
 659                 return 1;
 660         }
 661
 662         if (!is_null_oid(&ref->old_oid) &&
 663             starts_with(ref->name, "refs/tags/")) {
 664                 int r;
 665                 r = s_update_ref("updating tag", ref, 0);
 666                 format_display(display, r ? '!' : 't', _("[tag update]"),
 667                                r ? _("unable to update local ref") : NULL,
 668                                remote, pretty_ref, summary_width);
 669                 return r;
 670         }
 671
 672         current = lookup_commit_reference_gently(&ref->old_oid, 1);
 673         updated = lookup_commit_reference_gently(&ref->new_oid, 1);
 674         if (!current || !updated) {
 675                 const char *msg;
 676                 const char *what;
 677                 int r;
 678                 /*
 679                  * Nicely describe the new ref we're fetching.
 680                  * Base this on the remote's ref name, as it's
 681                  * more likely to follow a standard layout.
 682                  */
 683                 const char *name = remote_ref ? remote_ref->name : "";
 684                 if (starts_with(name, "refs/tags/")) {
 685                         msg = "storing tag";
 686                         what = _("[new tag]");
 687                 } else if (starts_with(name, "refs/heads/")) {
 688                         msg = "storing head";
 689                         what = _("[new branch]");
 690                 } else {
 691                         msg = "storing ref";
 692                         what = _("[new ref]");
 693                 }
 694
 695                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 696                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 697                         check_for_new_submodule_commits(&ref->new_oid);
 698                 r = s_update_ref(msg, ref, 0);
 699                 format_display(display, r ? '!' : '*', what,
 700                                r ? _("unable to update local ref") : NULL,
 701                                remote, pretty_ref, summary_width);
 702                 return r;
 703         }
 704
 705         if (in_merge_bases(current, updated)) {
 706                 struct strbuf quickref = STRBUF_INIT;
 707                 int r;
 708                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 709                 strbuf_addstr(&quickref, "..");
 710                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 711                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 712                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 713                         check_for_new_submodule_commits(&ref->new_oid);
 714                 r = s_update_ref("fast-forward", ref, 1);
 715                 format_display(display, r ? '!' : ' ', quickref.buf,
 716                                r ? _("unable to update local ref") : NULL,
 717                                remote, pretty_ref, summary_width);
 718                 strbuf_release(&quickref);
 719                 return r;
 720         } else if (force || ref->force) {
 721                 struct strbuf quickref = STRBUF_INIT;
 722                 int r;
 723                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 724                 strbuf_addstr(&quickref, "...");
 725                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 726                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 727                     (recurse_submodules != RECURSE_SUBMODULES_ON))
 728                         check_for_new_submodule_commits(&ref->new_oid);
 729                 r = s_update_ref("forced-update", ref, 1);
 730                 format_display(display, r ? '!' : '+', quickref.buf,
 731                                r ? _("unable to update local ref") : _("forced update"),
 732                                remote, pretty_ref, summary_width);
 733                 strbuf_release(&quickref);
 734                 return r;
 735         } else {
 736                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 737                                remote, pretty_ref, summary_width);
 738                 return 1;
 739         }
 740 }
 741
 742 static int iterate_ref_map(void *cb_data, struct object_id *oid)
 743 {
 744         struct ref **rm = cb_data;
 745         struct ref *ref = *rm;
 746
 747         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 748                 ref = ref->next;
 749         if (!ref)
 750                 return -1; /* end of the list */
 751         *rm = ref->next;
 752         oidcpy(oid, &ref->old_oid);
 753         return 0;
 754 }
 755
 756 static int store_updated_refs(const char *raw_url, const char *remote_name,
 757                 struct ref *ref_map)
 758 {
 759         FILE *fp;
 760         struct commit *commit;
 761         int url_len, i, rc = 0;
 762         struct strbuf note = STRBUF_INIT;
 763         const char *what, *kind;
 764         struct ref *rm;
 765         char *url;
 766         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 767         int want_status;
 768         int summary_width = transport_summary_width(ref_map);
 769
 770         fp = fopen(filename, "a");
 771         if (!fp)
 772                 return error_errno(_("cannot open %s"), filename);
 773
 774         if (raw_url)
 775                 url = transport_anonymize_url(raw_url);
 776         else
 777                 url = xstrdup("foreign");
 778
 779         rm = ref_map;
 780         if (check_connected(iterate_ref_map, &rm, NULL)) {
 781                 rc = error(_("%s did not send all necessary objects\n"), url);
 782                 goto abort;
 783         }
 784
 785         prepare_format_display(ref_map);
 786
 787         /*
 788          * We do a pass for each fetch_head_status type in their enum order, so
 789          * merged entries are written before not-for-merge. That lets readers
 790          * use FETCH_HEAD as a refname to refer to the ref to be merged.
 791          */
 792         for (want_status = FETCH_HEAD_MERGE;
 793              want_status <= FETCH_HEAD_IGNORE;
 794              want_status++) {
 795                 for (rm = ref_map; rm; rm = rm->next) {
 796                         struct ref *ref = NULL;
 797                         const char *merge_status_marker = "";
 798
 799                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 800                                 if (want_status == FETCH_HEAD_MERGE)
 801                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
 802                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
 803                                 continue;
 804                         }
 805
 806                         commit = lookup_commit_reference_gently(&rm->old_oid,
 807                                                                 1);
 808                         if (!commit)
 809                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 810
 811                         if (rm->fetch_head_status != want_status)
 812                                 continue;
 813
 814                         if (rm->peer_ref) {
 815                                 ref = alloc_ref(rm->peer_ref->name);
 816                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 817                                 oidcpy(&ref->new_oid, &rm->old_oid);
 818                                 ref->force = rm->peer_ref->force;
 819                         }
 820
 821
 822                         if (!strcmp(rm->name, "HEAD")) {
 823                                 kind = "";
 824                                 what = "";
 825                         }
 826                         else if (starts_with(rm->name, "refs/heads/")) {
 827                                 kind = "branch";
 828                                 what = rm->name + 11;
 829                         }
 830                         else if (starts_with(rm->name, "refs/tags/")) {
 831                                 kind = "tag";
 832                                 what = rm->name + 10;
 833                         }
 834                         else if (starts_with(rm->name, "refs/remotes/")) {
 835                                 kind = "remote-tracking branch";
 836                                 what = rm->name + 13;
 837                         }
 838                         else {
 839                                 kind = "";
 840                                 what = rm->name;
 841                         }
 842
 843                         url_len = strlen(url);
 844                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 845                                 ;
 846                         url_len = i + 1;
 847                         if (4 < i && !strncmp(".git", url + i - 3, 4))
 848                                 url_len = i - 3;
 849
 850                         strbuf_reset(&note);
 851                         if (*what) {
 852                                 if (*kind)
 853                                         strbuf_addf(&note, "%s ", kind);
 854                                 strbuf_addf(&note, "'%s' of ", what);
 855                         }
 856                         switch (rm->fetch_head_status) {
 857                         case FETCH_HEAD_NOT_FOR_MERGE:
 858                                 merge_status_marker = "not-for-merge";
 859                                 /* fall-through */
 860                         case FETCH_HEAD_MERGE:
 861                                 fprintf(fp, "%s\t%s\t%s",
 862                                         oid_to_hex(&rm->old_oid),
 863                                         merge_status_marker,
 864                                         note.buf);
 865                                 for (i = 0; i < url_len; ++i)
 866                                         if ('\n' == url[i])
 867                                                 fputs("\\n", fp);
 868                                         else
 869                                                 fputc(url[i], fp);
 870                                 fputc('\n', fp);
 871                                 break;
 872                         default:
 873                                 /* do not write anything to FETCH_HEAD */
 874                                 break;
 875                         }
 876
 877                         strbuf_reset(&note);
 878                         if (ref) {
 879                                 rc |= update_local_ref(ref, what, rm, &note,
 880                                                        summary_width);
 881                                 free(ref);
 882                         } else
 883                                 format_display(&note, '*',
 884                                                *kind ? kind : "branch", NULL,
 885                                                *what ? what : "HEAD",
 886                                                "FETCH_HEAD", summary_width);
 887                         if (note.len) {
 888                                 if (verbosity >= 0 && !shown_url) {
 889                                         fprintf(stderr, _("From %.*s\n"),
 890                                                         url_len, url);
 891                                         shown_url = 1;
 892                                 }
 893                                 if (verbosity >= 0)
 894                                         fprintf(stderr, " %s\n", note.buf);
 895                         }
 896                 }
 897         }
 898
 899         if (rc & STORE_REF_ERROR_DF_CONFLICT)
 900                 error(_("some local refs could not be updated; try running\n"
 901                       " 'git remote prune %s' to remove any old, conflicting "
 902                       "branches"), remote_name);
 903
 904  abort:
 905         strbuf_release(&note);
 906         free(url);
 907         fclose(fp);
 908         return rc;
 909 }
 910
 911 /*
 912  * We would want to bypass the object transfer altogether if
 913  * everything we are going to fetch already exists and is connected
 914  * locally.
 915  */
 916 static int quickfetch(struct ref *ref_map)
 917 {
 918         struct ref *rm = ref_map;
 919         struct check_connected_options opt = CHECK_CONNECTED_INIT;
 920
 921         /*
 922          * If we are deepening a shallow clone we already have these
 923          * objects reachable.  Running rev-list here will return with
 924          * a good (0) exit status and we'll bypass the fetch that we
 925          * really need to perform.  Claiming failure now will ensure
 926          * we perform the network exchange to deepen our history.
 927          */
 928         if (deepen)
 929                 return -1;
 930         opt.quiet = 1;
 931         return check_connected(iterate_ref_map, &rm, &opt);
 932 }
 933
 934 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 935 {
 936         int ret = quickfetch(ref_map);
 937         if (ret)
 938                 ret = transport_fetch_refs(transport, ref_map);
 939         if (!ret)
 940                 ret |= store_updated_refs(transport->url,
 941                                 transport->remote->name,
 942                                 ref_map);
 943         transport_unlock_pack(transport);
 944         return ret;
 945 }
 946
 947 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 948                 const char *raw_url)
 949 {
 950         int url_len, i, result = 0;
 951         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 952         char *url;
 953         int summary_width = transport_summary_width(stale_refs);
 954         const char *dangling_msg = dry_run
 955                 ? _("   (%s will become dangling)")
 956                 : _("   (%s has become dangling)");
 957
 958         if (raw_url)
 959                 url = transport_anonymize_url(raw_url);
 960         else
 961                 url = xstrdup("foreign");
 962
 963         url_len = strlen(url);
 964         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 965                 ;
 966
 967         url_len = i + 1;
 968         if (4 < i && !strncmp(".git", url + i - 3, 4))
 969                 url_len = i - 3;
 970
 971         if (!dry_run) {
 972                 struct string_list refnames = STRING_LIST_INIT_NODUP;
 973
 974                 for (ref = stale_refs; ref; ref = ref->next)
 975                         string_list_append(&refnames, ref->name);
 976
 977                 result = delete_refs("fetch: prune", &refnames, 0);
 978                 string_list_clear(&refnames, 0);
 979         }
 980
 981         if (verbosity >= 0) {
 982                 for (ref = stale_refs; ref; ref = ref->next) {
 983                         struct strbuf sb = STRBUF_INIT;
 984                         if (!shown_url) {
 985                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
 986                                 shown_url = 1;
 987                         }
 988                         format_display(&sb, '-', _("[deleted]"), NULL,
 989                                        _("(none)"), prettify_refname(ref->name),
 990                                        summary_width);
 991                         fprintf(stderr, " %s\n",sb.buf);
 992                         strbuf_release(&sb);
 993                         warn_dangling_symref(stderr, dangling_msg, ref->name);
 994                 }
 995         }
 996
 997         free(url);
 998         free_refs(stale_refs);
 999         return result;
1000 }
1001
1002 static void check_not_current_branch(struct ref *ref_map)
1003 {
1004         struct branch *current_branch = branch_get(NULL);
1005
1006         if (is_bare_repository() || !current_branch)
1007                 return;
1008
1009         for (; ref_map; ref_map = ref_map->next)
1010                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1011                                         ref_map->peer_ref->name))
1012                         die(_("Refusing to fetch into current branch %s "
1013                             "of non-bare repository"), current_branch->refname);
1014 }
1015
1016 static int truncate_fetch_head(void)
1017 {
1018         const char *filename = git_path_fetch_head();
1019         FILE *fp = fopen_for_writing(filename);
1020
1021         if (!fp)
1022                 return error_errno(_("cannot open %s"), filename);
1023         fclose(fp);
1024         return 0;
1025 }
1026
1027 static void set_option(struct transport *transport, const char *name, const char *value)
1028 {
1029         int r = transport_set_option(transport, name, value);
1030         if (r < 0)
1031                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1032                     name, value, transport->url);
1033         if (r > 0)
1034                 warning(_("Option \"%s\" is ignored for %s\n"),
1035                         name, transport->url);
1036 }
1037
1038 static struct transport *prepare_transport(struct remote *remote, int deepen)
1039 {
1040         struct transport *transport;
1041         transport = transport_get(remote, NULL);
1042         transport_set_verbosity(transport, verbosity, progress);
1043         transport->family = family;
1044         if (upload_pack)
1045                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1046         if (keep)
1047                 set_option(transport, TRANS_OPT_KEEP, "yes");
1048         if (depth)
1049                 set_option(transport, TRANS_OPT_DEPTH, depth);
1050         if (deepen && deepen_since)
1051                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1052         if (deepen && deepen_not.nr)
1053                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1054                            (const char *)&deepen_not);
1055         if (deepen_relative)
1056                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1057         if (update_shallow)
1058                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1059         return transport;
1060 }
1061
1062 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1063 {
1064         int cannot_reuse;
1065
1066         /*
1067          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1068          * when remote helper is used (setting it to an empty string
1069          * is not unsetting). We could extend the remote helper
1070          * protocol for that, but for now, just force a new connection
1071          * without deepen-since. Similar story for deepen-not.
1072          */
1073         cannot_reuse = transport->cannot_reuse ||
1074                 deepen_since || deepen_not.nr;
1075         if (cannot_reuse) {
1076                 gsecondary = prepare_transport(transport->remote, 0);
1077                 transport = gsecondary;
1078         }
1079
1080         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1081         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1082         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1083         fetch_refs(transport, ref_map);
1084
1085         if (gsecondary) {
1086                 transport_disconnect(gsecondary);
1087                 gsecondary = NULL;
1088         }
1089 }
1090
1091 static int do_fetch(struct transport *transport,
1092                     struct refspec *refs, int ref_count)
1093 {
1094         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1095         struct ref *ref_map;
1096         struct ref *rm;
1097         int autotags = (transport->remote->fetch_tags == 1);
1098         int retcode = 0;
1099
1100         for_each_ref(add_existing, &existing_refs);
1101
1102         if (tags == TAGS_DEFAULT) {
1103                 if (transport->remote->fetch_tags == 2)
1104                         tags = TAGS_SET;
1105                 if (transport->remote->fetch_tags == -1)
1106                         tags = TAGS_UNSET;
1107         }
1108
1109         /* if not appending, truncate FETCH_HEAD */
1110         if (!append && !dry_run) {
1111                 retcode = truncate_fetch_head();
1112                 if (retcode)
1113                         goto cleanup;
1114         }
1115
1116         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1117         if (!update_head_ok)
1118                 check_not_current_branch(ref_map);
1119
1120         for (rm = ref_map; rm; rm = rm->next) {
1121                 if (rm->peer_ref) {
1122                         struct string_list_item *peer_item =
1123                                 string_list_lookup(&existing_refs,
1124                                                    rm->peer_ref->name);
1125                         if (peer_item) {
1126                                 struct object_id *old_oid = peer_item->util;
1127                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1128                         }
1129                 }
1130         }
1131
1132         if (tags == TAGS_DEFAULT && autotags)
1133                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1134         if (prune) {
1135                 /*
1136                  * We only prune based on refspecs specified
1137                  * explicitly (via command line or configuration); we
1138                  * don't care whether --tags was specified.
1139                  */
1140                 if (ref_count) {
1141                         prune_refs(refs, ref_count, ref_map, transport->url);
1142                 } else {
1143                         prune_refs(transport->remote->fetch,
1144                                    transport->remote->fetch_refspec_nr,
1145                                    ref_map,
1146                                    transport->url);
1147                 }
1148         }
1149         if (fetch_refs(transport, ref_map)) {
1150                 free_refs(ref_map);
1151                 retcode = 1;
1152                 goto cleanup;
1153         }
1154         free_refs(ref_map);
1155
1156         /* if neither --no-tags nor --tags was specified, do automated tag
1157          * following ... */
1158         if (tags == TAGS_DEFAULT && autotags) {
1159                 struct ref **tail = &ref_map;
1160                 ref_map = NULL;
1161                 find_non_local_tags(transport, &ref_map, &tail);
1162                 if (ref_map)
1163                         backfill_tags(transport, ref_map);
1164                 free_refs(ref_map);
1165         }
1166
1167  cleanup:
1168         string_list_clear(&existing_refs, 1);
1169         return retcode;
1170 }
1171
1172 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1173 {
1174         struct string_list *list = priv;
1175         if (!remote->skip_default_update)
1176                 string_list_append(list, remote->name);
1177         return 0;
1178 }
1179
1180 struct remote_group_data {
1181         const char *name;
1182         struct string_list *list;
1183 };
1184
1185 static int get_remote_group(const char *key, const char *value, void *priv)
1186 {
1187         struct remote_group_data *g = priv;
1188
1189         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1190                 /* split list by white space */
1191                 while (*value) {
1192                         size_t wordlen = strcspn(value, " \t\n");
1193
1194                         if (wordlen >= 1)
1195                                 string_list_append_nodup(g->list,
1196                                                    xstrndup(value, wordlen));
1197                         value += wordlen + (value[wordlen] != '\0');
1198                 }
1199         }
1200
1201         return 0;
1202 }
1203
1204 static int add_remote_or_group(const char *name, struct string_list *list)
1205 {
1206         int prev_nr = list->nr;
1207         struct remote_group_data g;
1208         g.name = name; g.list = list;
1209
1210         git_config(get_remote_group, &g);
1211         if (list->nr == prev_nr) {
1212                 struct remote *remote = remote_get(name);
1213                 if (!remote_is_configured(remote, 0))
1214                         return 0;
1215                 string_list_append(list, remote->name);
1216         }
1217         return 1;
1218 }
1219
1220 static void add_options_to_argv(struct argv_array *argv)
1221 {
1222         if (dry_run)
1223                 argv_array_push(argv, "--dry-run");
1224         if (prune != -1)
1225                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1226         if (prune_tags != -1)
1227                 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1228         if (update_head_ok)
1229                 argv_array_push(argv, "--update-head-ok");
1230         if (force)
1231                 argv_array_push(argv, "--force");
1232         if (keep)
1233                 argv_array_push(argv, "--keep");
1234         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1235                 argv_array_push(argv, "--recurse-submodules");
1236         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1237                 argv_array_push(argv, "--recurse-submodules=on-demand");
1238         if (tags == TAGS_SET)
1239                 argv_array_push(argv, "--tags");
1240         else if (tags == TAGS_UNSET)
1241                 argv_array_push(argv, "--no-tags");
1242         if (verbosity >= 2)
1243                 argv_array_push(argv, "-v");
1244         if (verbosity >= 1)
1245                 argv_array_push(argv, "-v");
1246         else if (verbosity < 0)
1247                 argv_array_push(argv, "-q");
1248
1249 }
1250
1251 static int fetch_multiple(struct string_list *list)
1252 {
1253         int i, result = 0;
1254         struct argv_array argv = ARGV_ARRAY_INIT;
1255
1256         if (!append && !dry_run) {
1257                 int errcode = truncate_fetch_head();
1258                 if (errcode)
1259                         return errcode;
1260         }
1261
1262         argv_array_pushl(&argv, "fetch", "--append", NULL);
1263         add_options_to_argv(&argv);
1264
1265         for (i = 0; i < list->nr; i++) {
1266                 const char *name = list->items[i].string;
1267                 argv_array_push(&argv, name);
1268                 if (verbosity >= 0)
1269                         printf(_("Fetching %s\n"), name);
1270                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1271                         error(_("Could not fetch %s"), name);
1272                         result = 1;
1273                 }
1274                 argv_array_pop(&argv);
1275         }
1276
1277         argv_array_clear(&argv);
1278         return result;
1279 }
1280
1281 static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1282 {
1283         static const char **refs = NULL;
1284         struct refspec *refspec;
1285         int ref_nr = 0;
1286         int exit_code;
1287
1288         if (!remote)
1289                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1290                     "remote name from which new revisions should be fetched."));
1291
1292         gtransport = prepare_transport(remote, 1);
1293
1294         if (prune < 0) {
1295                 /* no command line request */
1296                 if (0 <= remote->prune)
1297                         prune = remote->prune;
1298                 else if (0 <= fetch_prune_config)
1299                         prune = fetch_prune_config;
1300                 else
1301                         prune = PRUNE_BY_DEFAULT;
1302         }
1303
1304         if (prune_tags < 0) {
1305                 /* no command line request */
1306                 if (0 <= remote->prune_tags)
1307                         prune_tags = remote->prune_tags;
1308                 else if (0 <= fetch_prune_tags_config)
1309                         prune_tags = fetch_prune_tags_config;
1310                 else
1311                         prune_tags = PRUNE_TAGS_BY_DEFAULT;
1312         }
1313
1314         if (prune_tags_ok && prune_tags && remote_is_configured(remote, 0))
1315                 add_prune_tags_to_fetch_refspec(remote);
1316
1317         if (argc > 0) {
1318                 int j = 0;
1319                 int i;
1320                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1321                 for (i = 0; i < argc; i++) {
1322                         if (!strcmp(argv[i], "tag")) {
1323                                 i++;
1324                                 if (i >= argc)
1325                                         die(_("You need to specify a tag name."));
1326                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1327                                                     argv[i], argv[i]);
1328                         } else
1329                                 refs[j++] = argv[i];
1330                         ref_nr++;
1331                 }
1332         }
1333
1334         sigchain_push_common(unlock_pack_on_signal);
1335         atexit(unlock_pack);
1336         refspec = parse_fetch_refspec(ref_nr, refs);
1337         exit_code = do_fetch(gtransport, refspec, ref_nr);
1338         free_refspec(ref_nr, refspec);
1339         transport_disconnect(gtransport);
1340         gtransport = NULL;
1341         return exit_code;
1342 }
1343
1344 int cmd_fetch(int argc, const char **argv, const char *prefix)
1345 {
1346         int i;
1347         struct string_list list = STRING_LIST_INIT_DUP;
1348         struct remote *remote;
1349         int result = 0;
1350         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1351
1352         packet_trace_identity("fetch");
1353
1354         /* Record the command line for the reflog */
1355         strbuf_addstr(&default_rla, "fetch");
1356         for (i = 1; i < argc; i++)
1357                 strbuf_addf(&default_rla, " %s", argv[i]);
1358
1359         config_from_gitmodules(gitmodules_fetch_config, NULL);
1360         git_config(git_fetch_config, NULL);
1361
1362         argc = parse_options(argc, argv, prefix,
1363                              builtin_fetch_options, builtin_fetch_usage, 0);
1364
1365         if (deepen_relative) {
1366                 if (deepen_relative < 0)
1367                         die(_("Negative depth in --deepen is not supported"));
1368                 if (depth)
1369                         die(_("--deepen and --depth are mutually exclusive"));
1370                 depth = xstrfmt("%d", deepen_relative);
1371         }
1372         if (unshallow) {
1373                 if (depth)
1374                         die(_("--depth and --unshallow cannot be used together"));
1375                 else if (!is_repository_shallow())
1376                         die(_("--unshallow on a complete repository does not make sense"));
1377                 else
1378                         depth = xstrfmt("%d", INFINITE_DEPTH);
1379         }
1380
1381         /* no need to be strict, transport_set_option() will validate it again */
1382         if (depth && atoi(depth) < 1)
1383                 die(_("depth %s is not a positive number"), depth);
1384         if (depth || deepen_since || deepen_not.nr)
1385                 deepen = 1;
1386
1387         if (all) {
1388                 if (argc == 1)
1389                         die(_("fetch --all does not take a repository argument"));
1390                 else if (argc > 1)
1391                         die(_("fetch --all does not make sense with refspecs"));
1392                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1393                 result = fetch_multiple(&list);
1394         } else if (argc == 0) {
1395                 /* No arguments -- use default remote */
1396                 remote = remote_get(NULL);
1397                 result = fetch_one(remote, argc, argv, 1);
1398         } else if (multiple) {
1399                 /* All arguments are assumed to be remotes or groups */
1400                 for (i = 0; i < argc; i++)
1401                         if (!add_remote_or_group(argv[i], &list))
1402                                 die(_("No such remote or remote group: %s"), argv[i]);
1403                 result = fetch_multiple(&list);
1404         } else {
1405                 /* Single remote or group */
1406                 (void) add_remote_or_group(argv[0], &list);
1407                 if (list.nr > 1) {
1408                         /* More than one remote */
1409                         if (argc > 1)
1410                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1411                         result = fetch_multiple(&list);
1412                 } else {
1413                         /* Zero or one remotes */
1414                         remote = remote_get(argv[0]);
1415                         result = fetch_one(remote, argc-1, argv+1, argc == 1);
1416                 }
1417         }
1418
1419         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1420                 struct argv_array options = ARGV_ARRAY_INIT;
1421
1422                 add_options_to_argv(&options);
1423                 result = fetch_populated_submodules(the_repository,
1424                                                     &options,
1425                                                     submodule_prefix,
1426                                                     recurse_submodules,
1427                                                     recurse_submodules_default,
1428                                                     verbosity < 0,
1429                                                     max_children);
1430                 argv_array_clear(&options);
1431         }
1432
1433         string_list_clear(&list, 0);
1434
1435         close_all_packs();
1436
1437         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1438         if (verbosity < 0)
1439                 argv_array_push(&argv_gc_auto, "--quiet");
1440         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1441         argv_array_clear(&argv_gc_auto);
1442
1443         return result;
1444 }