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 "refspec.h"
   9 #include "object-store.h"
  10 #include "oidset.h"
  11 #include "commit.h"
  12 #include "builtin.h"
  13 #include "string-list.h"
  14 #include "remote.h"
  15 #include "transport.h"
  16 #include "run-command.h"
  17 #include "parse-options.h"
  18 #include "sigchain.h"
  19 #include "submodule-config.h"
  20 #include "submodule.h"
  21 #include "connected.h"
  22 #include "strvec.h"
  23 #include "utf8.h"
  24 #include "packfile.h"
  25 #include "list-objects-filter-options.h"
  26 #include "commit-reach.h"
  27 #include "branch.h"
  28 #include "promisor-remote.h"
  29 #include "commit-graph.h"
  30 #include "shallow.h"
  31
  32 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
  33
  34 static const char * const builtin_fetch_usage[] = {
  35         N_("git fetch [<options>] [<repository> [<refspec>...]]"),
  36         N_("git fetch [<options>] <group>"),
  37         N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
  38         N_("git fetch --all [<options>]"),
  39         NULL
  40 };
  41
  42 enum {
  43         TAGS_UNSET = 0,
  44         TAGS_DEFAULT = 1,
  45         TAGS_SET = 2
  46 };
  47
  48 static int fetch_prune_config = -1; /* unspecified */
  49 static int fetch_show_forced_updates = 1;
  50 static uint64_t forced_updates_ms = 0;
  51 static int prune = -1; /* unspecified */
  52 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
  53
  54 static int fetch_prune_tags_config = -1; /* unspecified */
  55 static int prune_tags = -1; /* unspecified */
  56 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
  57
  58 static int all, append, dry_run, force, keep, multiple, update_head_ok;
  59 static int write_fetch_head = 1;
  60 static int verbosity, deepen_relative, set_upstream;
  61 static int progress = -1;
  62 static int enable_auto_gc = 1;
  63 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  64 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
  65 static int fetch_parallel_config = 1;
  66 static enum transport_family family;
  67 static const char *depth;
  68 static const char *deepen_since;
  69 static const char *upload_pack;
  70 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
  71 static struct strbuf default_rla = STRBUF_INIT;
  72 static struct transport *gtransport;
  73 static struct transport *gsecondary;
  74 static const char *submodule_prefix = "";
  75 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  76 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
  77 static int shown_url = 0;
  78 static struct refspec refmap = REFSPEC_INIT_FETCH;
  79 static struct list_objects_filter_options filter_options;
  80 static struct string_list server_options = STRING_LIST_INIT_DUP;
  81 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
  82 static int fetch_write_commit_graph = -1;
  83 static int stdin_refspecs = 0;
  84
  85 static int git_fetch_config(const char *k, const char *v, void *cb)
  86 {
  87         if (!strcmp(k, "fetch.prune")) {
  88                 fetch_prune_config = git_config_bool(k, v);
  89                 return 0;
  90         }
  91
  92         if (!strcmp(k, "fetch.prunetags")) {
  93                 fetch_prune_tags_config = git_config_bool(k, v);
  94                 return 0;
  95         }
  96
  97         if (!strcmp(k, "fetch.showforcedupdates")) {
  98                 fetch_show_forced_updates = git_config_bool(k, v);
  99                 return 0;
 100         }
 101
 102         if (!strcmp(k, "submodule.recurse")) {
 103                 int r = git_config_bool(k, v) ?
 104                         RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
 105                 recurse_submodules = r;
 106         }
 107
 108         if (!strcmp(k, "submodule.fetchjobs")) {
 109                 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
 110                 return 0;
 111         } else if (!strcmp(k, "fetch.recursesubmodules")) {
 112                 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
 113                 return 0;
 114         }
 115
 116         if (!strcmp(k, "fetch.parallel")) {
 117                 fetch_parallel_config = git_config_int(k, v);
 118                 if (fetch_parallel_config < 0)
 119                         die(_("fetch.parallel cannot be negative"));
 120                 return 0;
 121         }
 122
 123         return git_default_config(k, v, cb);
 124 }
 125
 126 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
 127 {
 128         BUG_ON_OPT_NEG(unset);
 129
 130         /*
 131          * "git fetch --refmap='' origin foo"
 132          * can be used to tell the command not to store anywhere
 133          */
 134         refspec_append(&refmap, arg);
 135
 136         return 0;
 137 }
 138
 139 static struct option builtin_fetch_options[] = {
 140         OPT__VERBOSITY(&verbosity),
 141         OPT_BOOL(0, "all", &all,
 142                  N_("fetch from all remotes")),
 143         OPT_BOOL(0, "set-upstream", &set_upstream,
 144                  N_("set upstream for git pull/fetch")),
 145         OPT_BOOL('a', "append", &append,
 146                  N_("append to .git/FETCH_HEAD instead of overwriting")),
 147         OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 148                    N_("path to upload pack on remote end")),
 149         OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
 150         OPT_BOOL('m', "multiple", &multiple,
 151                  N_("fetch from multiple remotes")),
 152         OPT_SET_INT('t', "tags", &tags,
 153                     N_("fetch all tags and associated objects"), TAGS_SET),
 154         OPT_SET_INT('n', NULL, &tags,
 155                     N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 156         OPT_INTEGER('j', "jobs", &max_jobs,
 157                     N_("number of submodules fetched in parallel")),
 158         OPT_BOOL('p', "prune", &prune,
 159                  N_("prune remote-tracking branches no longer on remote")),
 160         OPT_BOOL('P', "prune-tags", &prune_tags,
 161                  N_("prune local tags no longer on remote and clobber changed tags")),
 162         OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
 163                     N_("control recursive fetching of submodules"),
 164                     PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
 165         OPT_BOOL(0, "dry-run", &dry_run,
 166                  N_("dry run")),
 167         OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
 168                  N_("write fetched references to the FETCH_HEAD file")),
 169         OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 170         OPT_BOOL('u', "update-head-ok", &update_head_ok,
 171                     N_("allow updating of HEAD ref")),
 172         OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 173         OPT_STRING(0, "depth", &depth, N_("depth"),
 174                    N_("deepen history of shallow clone")),
 175         OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
 176                    N_("deepen history of shallow repository based on time")),
 177         OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
 178                         N_("deepen history of shallow clone, excluding rev")),
 179         OPT_INTEGER(0, "deepen", &deepen_relative,
 180                     N_("deepen history of shallow clone")),
 181         OPT_SET_INT_F(0, "unshallow", &unshallow,
 182                       N_("convert to a complete repository"),
 183                       1, PARSE_OPT_NONEG),
 184         { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 185                    N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 186         OPT_CALLBACK_F(0, "recurse-submodules-default",
 187                    &recurse_submodules_default, N_("on-demand"),
 188                    N_("default for recursive fetching of submodules "
 189                       "(lower priority than config files)"),
 190                    PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
 191         OPT_BOOL(0, "update-shallow", &update_shallow,
 192                  N_("accept refs that update .git/shallow")),
 193         OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
 194                        N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
 195         OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
 196         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 197                         TRANSPORT_FAMILY_IPV4),
 198         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 199                         TRANSPORT_FAMILY_IPV6),
 200         OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
 201                         N_("report that we have only objects reachable from this object")),
 202         OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 203         OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
 204                  N_("run 'maintenance --auto' after fetching")),
 205         OPT_BOOL(0, "auto-gc", &enable_auto_gc,
 206                  N_("run 'maintenance --auto' after fetching")),
 207         OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
 208                  N_("check for forced-updates on all updated branches")),
 209         OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
 210                  N_("write the commit-graph after fetching")),
 211         OPT_BOOL(0, "stdin", &stdin_refspecs,
 212                  N_("accept refspecs from stdin")),
 213         OPT_END()
 214 };
 215
 216 static void unlock_pack(void)
 217 {
 218         if (gtransport)
 219                 transport_unlock_pack(gtransport);
 220         if (gsecondary)
 221                 transport_unlock_pack(gsecondary);
 222 }
 223
 224 static void unlock_pack_on_signal(int signo)
 225 {
 226         unlock_pack();
 227         sigchain_pop(signo);
 228         raise(signo);
 229 }
 230
 231 static void add_merge_config(struct ref **head,
 232                            const struct ref *remote_refs,
 233                            struct branch *branch,
 234                            struct ref ***tail)
 235 {
 236         int i;
 237
 238         for (i = 0; i < branch->merge_nr; i++) {
 239                 struct ref *rm, **old_tail = *tail;
 240                 struct refspec_item refspec;
 241
 242                 for (rm = *head; rm; rm = rm->next) {
 243                         if (branch_merge_matches(branch, i, rm->name)) {
 244                                 rm->fetch_head_status = FETCH_HEAD_MERGE;
 245                                 break;
 246                         }
 247                 }
 248                 if (rm)
 249                         continue;
 250
 251                 /*
 252                  * Not fetched to a remote-tracking branch?  We need to fetch
 253                  * it anyway to allow this branch's "branch.$name.merge"
 254                  * to be honored by 'git pull', but we do not have to
 255                  * fail if branch.$name.merge is misconfigured to point
 256                  * at a nonexisting branch.  If we were indeed called by
 257                  * 'git pull', it will notice the misconfiguration because
 258                  * there is no entry in the resulting FETCH_HEAD marked
 259                  * for merging.
 260                  */
 261                 memset(&refspec, 0, sizeof(refspec));
 262                 refspec.src = branch->merge[i]->src;
 263                 get_fetch_map(remote_refs, &refspec, tail, 1);
 264                 for (rm = *old_tail; rm; rm = rm->next)
 265                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 266         }
 267 }
 268
 269 static void create_fetch_oidset(struct ref **head, struct oidset *out)
 270 {
 271         struct ref *rm = *head;
 272         while (rm) {
 273                 oidset_insert(out, &rm->old_oid);
 274                 rm = rm->next;
 275         }
 276 }
 277
 278 struct refname_hash_entry {
 279         struct hashmap_entry ent;
 280         struct object_id oid;
 281         int ignore;
 282         char refname[FLEX_ARRAY];
 283 };
 284
 285 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
 286                                   const struct hashmap_entry *eptr,
 287                                   const struct hashmap_entry *entry_or_key,
 288                                   const void *keydata)
 289 {
 290         const struct refname_hash_entry *e1, *e2;
 291
 292         e1 = container_of(eptr, const struct refname_hash_entry, ent);
 293         e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
 294         return strcmp(e1->refname, keydata ? keydata : e2->refname);
 295 }
 296
 297 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
 298                                                    const char *refname,
 299                                                    const struct object_id *oid)
 300 {
 301         struct refname_hash_entry *ent;
 302         size_t len = strlen(refname);
 303
 304         FLEX_ALLOC_MEM(ent, refname, refname, len);
 305         hashmap_entry_init(&ent->ent, strhash(refname));
 306         oidcpy(&ent->oid, oid);
 307         hashmap_add(map, &ent->ent);
 308         return ent;
 309 }
 310
 311 static int add_one_refname(const char *refname,
 312                            const struct object_id *oid,
 313                            int flag, void *cbdata)
 314 {
 315         struct hashmap *refname_map = cbdata;
 316
 317         (void) refname_hash_add(refname_map, refname, oid);
 318         return 0;
 319 }
 320
 321 static void refname_hash_init(struct hashmap *map)
 322 {
 323         hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
 324 }
 325
 326 static int refname_hash_exists(struct hashmap *map, const char *refname)
 327 {
 328         return !!hashmap_get_from_hash(map, strhash(refname), refname);
 329 }
 330
 331 static void clear_item(struct refname_hash_entry *item)
 332 {
 333         item->ignore = 1;
 334 }
 335
 336 static void find_non_local_tags(const struct ref *refs,
 337                                 struct ref **head,
 338                                 struct ref ***tail)
 339 {
 340         struct hashmap existing_refs;
 341         struct hashmap remote_refs;
 342         struct oidset fetch_oids = OIDSET_INIT;
 343         struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
 344         struct string_list_item *remote_ref_item;
 345         const struct ref *ref;
 346         struct refname_hash_entry *item = NULL;
 347         const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
 348
 349         refname_hash_init(&existing_refs);
 350         refname_hash_init(&remote_refs);
 351         create_fetch_oidset(head, &fetch_oids);
 352
 353         for_each_ref(add_one_refname, &existing_refs);
 354         for (ref = refs; ref; ref = ref->next) {
 355                 if (!starts_with(ref->name, "refs/tags/"))
 356                         continue;
 357
 358                 /*
 359                  * The peeled ref always follows the matching base
 360                  * ref, so if we see a peeled ref that we don't want
 361                  * to fetch then we can mark the ref entry in the list
 362                  * as one to ignore by setting util to NULL.
 363                  */
 364                 if (ends_with(ref->name, "^{}")) {
 365                         if (item &&
 366                             !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
 367                             !oidset_contains(&fetch_oids, &ref->old_oid) &&
 368                             !has_object_file_with_flags(&item->oid, quick_flags) &&
 369                             !oidset_contains(&fetch_oids, &item->oid))
 370                                 clear_item(item);
 371                         item = NULL;
 372                         continue;
 373                 }
 374
 375                 /*
 376                  * If item is non-NULL here, then we previously saw a
 377                  * ref not followed by a peeled reference, so we need
 378                  * to check if it is a lightweight tag that we want to
 379                  * fetch.
 380                  */
 381                 if (item &&
 382                     !has_object_file_with_flags(&item->oid, quick_flags) &&
 383                     !oidset_contains(&fetch_oids, &item->oid))
 384                         clear_item(item);
 385
 386                 item = NULL;
 387
 388                 /* skip duplicates and refs that we already have */
 389                 if (refname_hash_exists(&remote_refs, ref->name) ||
 390                     refname_hash_exists(&existing_refs, ref->name))
 391                         continue;
 392
 393                 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
 394                 string_list_insert(&remote_refs_list, ref->name);
 395         }
 396         hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
 397
 398         /*
 399          * We may have a final lightweight tag that needs to be
 400          * checked to see if it needs fetching.
 401          */
 402         if (item &&
 403             !has_object_file_with_flags(&item->oid, quick_flags) &&
 404             !oidset_contains(&fetch_oids, &item->oid))
 405                 clear_item(item);
 406
 407         /*
 408          * For all the tags in the remote_refs_list,
 409          * add them to the list of refs to be fetched
 410          */
 411         for_each_string_list_item(remote_ref_item, &remote_refs_list) {
 412                 const char *refname = remote_ref_item->string;
 413                 struct ref *rm;
 414                 unsigned int hash = strhash(refname);
 415
 416                 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
 417                                         struct refname_hash_entry, ent);
 418                 if (!item)
 419                         BUG("unseen remote ref?");
 420
 421                 /* Unless we have already decided to ignore this item... */
 422                 if (item->ignore)
 423                         continue;
 424
 425                 rm = alloc_ref(item->refname);
 426                 rm->peer_ref = alloc_ref(item->refname);
 427                 oidcpy(&rm->old_oid, &item->oid);
 428                 **tail = rm;
 429                 *tail = &rm->next;
 430         }
 431         hashmap_free_entries(&remote_refs, struct refname_hash_entry, ent);
 432         string_list_clear(&remote_refs_list, 0);
 433         oidset_clear(&fetch_oids);
 434 }
 435
 436 static struct ref *get_ref_map(struct remote *remote,
 437                                const struct ref *remote_refs,
 438                                struct refspec *rs,
 439                                int tags, int *autotags)
 440 {
 441         int i;
 442         struct ref *rm;
 443         struct ref *ref_map = NULL;
 444         struct ref **tail = &ref_map;
 445
 446         /* opportunistically-updated references: */
 447         struct ref *orefs = NULL, **oref_tail = &orefs;
 448
 449         struct hashmap existing_refs;
 450         int existing_refs_populated = 0;
 451
 452         if (rs->nr) {
 453                 struct refspec *fetch_refspec;
 454
 455                 for (i = 0; i < rs->nr; i++) {
 456                         get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
 457                         if (rs->items[i].dst && rs->items[i].dst[0])
 458                                 *autotags = 1;
 459                 }
 460                 /* Merge everything on the command line (but not --tags) */
 461                 for (rm = ref_map; rm; rm = rm->next)
 462                         rm->fetch_head_status = FETCH_HEAD_MERGE;
 463
 464                 /*
 465                  * For any refs that we happen to be fetching via
 466                  * command-line arguments, the destination ref might
 467                  * have been missing or have been different than the
 468                  * remote-tracking ref that would be derived from the
 469                  * configured refspec.  In these cases, we want to
 470                  * take the opportunity to update their configured
 471                  * remote-tracking reference.  However, we do not want
 472                  * to mention these entries in FETCH_HEAD at all, as
 473                  * they would simply be duplicates of existing
 474                  * entries, so we set them FETCH_HEAD_IGNORE below.
 475                  *
 476                  * We compute these entries now, based only on the
 477                  * refspecs specified on the command line.  But we add
 478                  * them to the list following the refspecs resulting
 479                  * from the tags option so that one of the latter,
 480                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 481                  * by ref_remove_duplicates() in favor of one of these
 482                  * opportunistic entries with FETCH_HEAD_IGNORE.
 483                  */
 484                 if (refmap.nr)
 485                         fetch_refspec = &refmap;
 486                 else
 487                         fetch_refspec = &remote->fetch;
 488
 489                 for (i = 0; i < fetch_refspec->nr; i++)
 490                         get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
 491         } else if (refmap.nr) {
 492                 die("--refmap option is only meaningful with command-line refspec(s).");
 493         } else {
 494                 /* Use the defaults */
 495                 struct branch *branch = branch_get(NULL);
 496                 int has_merge = branch_has_merge_config(branch);
 497                 if (remote &&
 498                     (remote->fetch.nr ||
 499                      /* Note: has_merge implies non-NULL branch->remote_name */
 500                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 501                         for (i = 0; i < remote->fetch.nr; i++) {
 502                                 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
 503                                 if (remote->fetch.items[i].dst &&
 504                                     remote->fetch.items[i].dst[0])
 505                                         *autotags = 1;
 506                                 if (!i && !has_merge && ref_map &&
 507                                     !remote->fetch.items[0].pattern)
 508                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 509                         }
 510                         /*
 511                          * if the remote we're fetching from is the same
 512                          * as given in branch.<name>.remote, we add the
 513                          * ref given in branch.<name>.merge, too.
 514                          *
 515                          * Note: has_merge implies non-NULL branch->remote_name
 516                          */
 517                         if (has_merge &&
 518                             !strcmp(branch->remote_name, remote->name))
 519                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 520                 } else {
 521                         ref_map = get_remote_ref(remote_refs, "HEAD");
 522                         if (!ref_map)
 523                                 die(_("Couldn't find remote ref HEAD"));
 524                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 525                         tail = &ref_map->next;
 526                 }
 527         }
 528
 529         if (tags == TAGS_SET)
 530                 /* also fetch all tags */
 531                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 532         else if (tags == TAGS_DEFAULT && *autotags)
 533                 find_non_local_tags(remote_refs, &ref_map, &tail);
 534
 535         /* Now append any refs to be updated opportunistically: */
 536         *tail = orefs;
 537         for (rm = orefs; rm; rm = rm->next) {
 538                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
 539                 tail = &rm->next;
 540         }
 541
 542         /*
 543          * apply negative refspecs first, before we remove duplicates. This is
 544          * necessary as negative refspecs might remove an otherwise conflicting
 545          * duplicate.
 546          */
 547         if (rs->nr)
 548                 ref_map = apply_negative_refspecs(ref_map, rs);
 549         else
 550                 ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
 551
 552         ref_map = ref_remove_duplicates(ref_map);
 553
 554         for (rm = ref_map; rm; rm = rm->next) {
 555                 if (rm->peer_ref) {
 556                         const char *refname = rm->peer_ref->name;
 557                         struct refname_hash_entry *peer_item;
 558                         unsigned int hash = strhash(refname);
 559
 560                         if (!existing_refs_populated) {
 561                                 refname_hash_init(&existing_refs);
 562                                 for_each_ref(add_one_refname, &existing_refs);
 563                                 existing_refs_populated = 1;
 564                         }
 565
 566                         peer_item = hashmap_get_entry_from_hash(&existing_refs,
 567                                                 hash, refname,
 568                                                 struct refname_hash_entry, ent);
 569                         if (peer_item) {
 570                                 struct object_id *old_oid = &peer_item->oid;
 571                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
 572                         }
 573                 }
 574         }
 575         if (existing_refs_populated)
 576                 hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
 577
 578         return ref_map;
 579 }
 580
 581 #define STORE_REF_ERROR_OTHER 1
 582 #define STORE_REF_ERROR_DF_CONFLICT 2
 583
 584 static int s_update_ref(const char *action,
 585                         struct ref *ref,
 586                         int check_old)
 587 {
 588         char *msg;
 589         char *rla = getenv("GIT_REFLOG_ACTION");
 590         struct ref_transaction *transaction;
 591         struct strbuf err = STRBUF_INIT;
 592         int ret, df_conflict = 0;
 593
 594         if (dry_run)
 595                 return 0;
 596         if (!rla)
 597                 rla = default_rla.buf;
 598         msg = xstrfmt("%s: %s", rla, action);
 599
 600         transaction = ref_transaction_begin(&err);
 601         if (!transaction ||
 602             ref_transaction_update(transaction, ref->name,
 603                                    &ref->new_oid,
 604                                    check_old ? &ref->old_oid : NULL,
 605                                    0, msg, &err))
 606                 goto fail;
 607
 608         ret = ref_transaction_commit(transaction, &err);
 609         if (ret) {
 610                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 611                 goto fail;
 612         }
 613
 614         ref_transaction_free(transaction);
 615         strbuf_release(&err);
 616         free(msg);
 617         return 0;
 618 fail:
 619         ref_transaction_free(transaction);
 620         error("%s", err.buf);
 621         strbuf_release(&err);
 622         free(msg);
 623         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 624                            : STORE_REF_ERROR_OTHER;
 625 }
 626
 627 static int refcol_width = 10;
 628 static int compact_format;
 629
 630 static void adjust_refcol_width(const struct ref *ref)
 631 {
 632         int max, rlen, llen, len;
 633
 634         /* uptodate lines are only shown on high verbosity level */
 635         if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
 636                 return;
 637
 638         max    = term_columns();
 639         rlen   = utf8_strwidth(prettify_refname(ref->name));
 640
 641         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 642
 643         /*
 644          * rough estimation to see if the output line is too long and
 645          * should not be counted (we can't do precise calculation
 646          * anyway because we don't know if the error explanation part
 647          * will be printed in update_local_ref)
 648          */
 649         if (compact_format) {
 650                 llen = 0;
 651                 max = max * 2 / 3;
 652         }
 653         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 654         if (len >= max)
 655                 return;
 656
 657         /*
 658          * Not precise calculation for compact mode because '*' can
 659          * appear on the left hand side of '->' and shrink the column
 660          * back.
 661          */
 662         if (refcol_width < rlen)
 663                 refcol_width = rlen;
 664 }
 665
 666 static void prepare_format_display(struct ref *ref_map)
 667 {
 668         struct ref *rm;
 669         const char *format = "full";
 670
 671         git_config_get_string_tmp("fetch.output", &format);
 672         if (!strcasecmp(format, "full"))
 673                 compact_format = 0;
 674         else if (!strcasecmp(format, "compact"))
 675                 compact_format = 1;
 676         else
 677                 die(_("configuration fetch.output contains invalid value %s"),
 678                     format);
 679
 680         for (rm = ref_map; rm; rm = rm->next) {
 681                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 682                     !rm->peer_ref ||
 683                     !strcmp(rm->name, "HEAD"))
 684                         continue;
 685
 686                 adjust_refcol_width(rm);
 687         }
 688 }
 689
 690 static void print_remote_to_local(struct strbuf *display,
 691                                   const char *remote, const char *local)
 692 {
 693         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 694 }
 695
 696 static int find_and_replace(struct strbuf *haystack,
 697                             const char *needle,
 698                             const char *placeholder)
 699 {
 700         const char *p = NULL;
 701         int plen, nlen;
 702
 703         nlen = strlen(needle);
 704         if (ends_with(haystack->buf, needle))
 705                 p = haystack->buf + haystack->len - nlen;
 706         else
 707                 p = strstr(haystack->buf, needle);
 708         if (!p)
 709                 return 0;
 710
 711         if (p > haystack->buf && p[-1] != '/')
 712                 return 0;
 713
 714         plen = strlen(p);
 715         if (plen > nlen && p[nlen] != '/')
 716                 return 0;
 717
 718         strbuf_splice(haystack, p - haystack->buf, nlen,
 719                       placeholder, strlen(placeholder));
 720         return 1;
 721 }
 722
 723 static void print_compact(struct strbuf *display,
 724                           const char *remote, const char *local)
 725 {
 726         struct strbuf r = STRBUF_INIT;
 727         struct strbuf l = STRBUF_INIT;
 728
 729         if (!strcmp(remote, local)) {
 730                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 731                 return;
 732         }
 733
 734         strbuf_addstr(&r, remote);
 735         strbuf_addstr(&l, local);
 736
 737         if (!find_and_replace(&r, local, "*"))
 738                 find_and_replace(&l, remote, "*");
 739         print_remote_to_local(display, r.buf, l.buf);
 740
 741         strbuf_release(&r);
 742         strbuf_release(&l);
 743 }
 744
 745 static void format_display(struct strbuf *display, char code,
 746                            const char *summary, const char *error,
 747                            const char *remote, const char *local,
 748                            int summary_width)
 749 {
 750         int width = (summary_width + strlen(summary) - gettext_width(summary));
 751
 752         strbuf_addf(display, "%c %-*s ", code, width, summary);
 753         if (!compact_format)
 754                 print_remote_to_local(display, remote, local);
 755         else
 756                 print_compact(display, remote, local);
 757         if (error)
 758                 strbuf_addf(display, "  (%s)", error);
 759 }
 760
 761 static int update_local_ref(struct ref *ref,
 762                             const char *remote,
 763                             const struct ref *remote_ref,
 764                             struct strbuf *display,
 765                             int summary_width)
 766 {
 767         struct commit *current = NULL, *updated;
 768         enum object_type type;
 769         struct branch *current_branch = branch_get(NULL);
 770         const char *pretty_ref = prettify_refname(ref->name);
 771         int fast_forward = 0;
 772
 773         type = oid_object_info(the_repository, &ref->new_oid, NULL);
 774         if (type < 0)
 775                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 776
 777         if (oideq(&ref->old_oid, &ref->new_oid)) {
 778                 if (verbosity > 0)
 779                         format_display(display, '=', _("[up to date]"), NULL,
 780                                        remote, pretty_ref, summary_width);
 781                 return 0;
 782         }
 783
 784         if (current_branch &&
 785             !strcmp(ref->name, current_branch->name) &&
 786             !(update_head_ok || is_bare_repository()) &&
 787             !is_null_oid(&ref->old_oid)) {
 788                 /*
 789                  * If this is the head, and it's not okay to update
 790                  * the head, and the old value of the head isn't empty...
 791                  */
 792                 format_display(display, '!', _("[rejected]"),
 793                                _("can't fetch in current branch"),
 794                                remote, pretty_ref, summary_width);
 795                 return 1;
 796         }
 797
 798         if (!is_null_oid(&ref->old_oid) &&
 799             starts_with(ref->name, "refs/tags/")) {
 800                 if (force || ref->force) {
 801                         int r;
 802                         r = s_update_ref("updating tag", ref, 0);
 803                         format_display(display, r ? '!' : 't', _("[tag update]"),
 804                                        r ? _("unable to update local ref") : NULL,
 805                                        remote, pretty_ref, summary_width);
 806                         return r;
 807                 } else {
 808                         format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
 809                                        remote, pretty_ref, summary_width);
 810                         return 1;
 811                 }
 812         }
 813
 814         current = lookup_commit_reference_gently(the_repository,
 815                                                  &ref->old_oid, 1);
 816         updated = lookup_commit_reference_gently(the_repository,
 817                                                  &ref->new_oid, 1);
 818         if (!current || !updated) {
 819                 const char *msg;
 820                 const char *what;
 821                 int r;
 822                 /*
 823                  * Nicely describe the new ref we're fetching.
 824                  * Base this on the remote's ref name, as it's
 825                  * more likely to follow a standard layout.
 826                  */
 827                 const char *name = remote_ref ? remote_ref->name : "";
 828                 if (starts_with(name, "refs/tags/")) {
 829                         msg = "storing tag";
 830                         what = _("[new tag]");
 831                 } else if (starts_with(name, "refs/heads/")) {
 832                         msg = "storing head";
 833                         what = _("[new branch]");
 834                 } else {
 835                         msg = "storing ref";
 836                         what = _("[new ref]");
 837                 }
 838
 839                 r = s_update_ref(msg, ref, 0);
 840                 format_display(display, r ? '!' : '*', what,
 841                                r ? _("unable to update local ref") : NULL,
 842                                remote, pretty_ref, summary_width);
 843                 return r;
 844         }
 845
 846         if (fetch_show_forced_updates) {
 847                 uint64_t t_before = getnanotime();
 848                 fast_forward = in_merge_bases(current, updated);
 849                 forced_updates_ms += (getnanotime() - t_before) / 1000000;
 850         } else {
 851                 fast_forward = 1;
 852         }
 853
 854         if (fast_forward) {
 855                 struct strbuf quickref = STRBUF_INIT;
 856                 int r;
 857
 858                 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
 859                 strbuf_addstr(&quickref, "..");
 860                 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
 861                 r = s_update_ref("fast-forward", ref, 1);
 862                 format_display(display, r ? '!' : ' ', quickref.buf,
 863                                r ? _("unable to update local ref") : NULL,
 864                                remote, pretty_ref, summary_width);
 865                 strbuf_release(&quickref);
 866                 return r;
 867         } else if (force || ref->force) {
 868                 struct strbuf quickref = STRBUF_INIT;
 869                 int r;
 870                 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
 871                 strbuf_addstr(&quickref, "...");
 872                 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
 873                 r = s_update_ref("forced-update", ref, 1);
 874                 format_display(display, r ? '!' : '+', quickref.buf,
 875                                r ? _("unable to update local ref") : _("forced update"),
 876                                remote, pretty_ref, summary_width);
 877                 strbuf_release(&quickref);
 878                 return r;
 879         } else {
 880                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 881                                remote, pretty_ref, summary_width);
 882                 return 1;
 883         }
 884 }
 885
 886 static int iterate_ref_map(void *cb_data, struct object_id *oid)
 887 {
 888         struct ref **rm = cb_data;
 889         struct ref *ref = *rm;
 890
 891         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 892                 ref = ref->next;
 893         if (!ref)
 894                 return -1; /* end of the list */
 895         *rm = ref->next;
 896         oidcpy(oid, &ref->old_oid);
 897         return 0;
 898 }
 899
 900 static const char warn_show_forced_updates[] =
 901 N_("Fetch normally indicates which branches had a forced update,\n"
 902    "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
 903    "flag or run 'git config fetch.showForcedUpdates true'.");
 904 static const char warn_time_show_forced_updates[] =
 905 N_("It took %.2f seconds to check forced updates. You can use\n"
 906    "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
 907    " to avoid this check.\n");
 908
 909 static int store_updated_refs(const char *raw_url, const char *remote_name,
 910                               int connectivity_checked, struct ref *ref_map)
 911 {
 912         FILE *fp;
 913         struct commit *commit;
 914         int url_len, i, rc = 0;
 915         struct strbuf note = STRBUF_INIT;
 916         const char *what, *kind;
 917         struct ref *rm;
 918         char *url;
 919         const char *filename = (!write_fetch_head
 920                                 ? "/dev/null"
 921                                 : git_path_fetch_head(the_repository));
 922         int want_status;
 923         int summary_width = transport_summary_width(ref_map);
 924
 925         fp = fopen(filename, "a");
 926         if (!fp)
 927                 return error_errno(_("cannot open %s"), filename);
 928
 929         if (raw_url)
 930                 url = transport_anonymize_url(raw_url);
 931         else
 932                 url = xstrdup("foreign");
 933
 934         if (!connectivity_checked) {
 935                 struct check_connected_options opt = CHECK_CONNECTED_INIT;
 936
 937                 rm = ref_map;
 938                 if (check_connected(iterate_ref_map, &rm, &opt)) {
 939                         rc = error(_("%s did not send all necessary objects\n"), url);
 940                         goto abort;
 941                 }
 942         }
 943
 944         prepare_format_display(ref_map);
 945
 946         /*
 947          * We do a pass for each fetch_head_status type in their enum order, so
 948          * merged entries are written before not-for-merge. That lets readers
 949          * use FETCH_HEAD as a refname to refer to the ref to be merged.
 950          */
 951         for (want_status = FETCH_HEAD_MERGE;
 952              want_status <= FETCH_HEAD_IGNORE;
 953              want_status++) {
 954                 for (rm = ref_map; rm; rm = rm->next) {
 955                         struct ref *ref = NULL;
 956                         const char *merge_status_marker = "";
 957
 958                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 959                                 if (want_status == FETCH_HEAD_MERGE)
 960                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
 961                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
 962                                 continue;
 963                         }
 964
 965                         commit = lookup_commit_reference_gently(the_repository,
 966                                                                 &rm->old_oid,
 967                                                                 1);
 968                         if (!commit)
 969                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 970
 971                         if (rm->fetch_head_status != want_status)
 972                                 continue;
 973
 974                         if (rm->peer_ref) {
 975                                 ref = alloc_ref(rm->peer_ref->name);
 976                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 977                                 oidcpy(&ref->new_oid, &rm->old_oid);
 978                                 ref->force = rm->peer_ref->force;
 979                         }
 980
 981                         if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
 982                             (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
 983                                 check_for_new_submodule_commits(&rm->old_oid);
 984                         }
 985
 986                         if (!strcmp(rm->name, "HEAD")) {
 987                                 kind = "";
 988                                 what = "";
 989                         }
 990                         else if (skip_prefix(rm->name, "refs/heads/", &what))
 991                                 kind = "branch";
 992                         else if (skip_prefix(rm->name, "refs/tags/", &what))
 993                                 kind = "tag";
 994                         else if (skip_prefix(rm->name, "refs/remotes/", &what))
 995                                 kind = "remote-tracking branch";
 996                         else {
 997                                 kind = "";
 998                                 what = rm->name;
 999                         }
1000
1001                         url_len = strlen(url);
1002                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1003                                 ;
1004                         url_len = i + 1;
1005                         if (4 < i && !strncmp(".git", url + i - 3, 4))
1006                                 url_len = i - 3;
1007
1008                         strbuf_reset(&note);
1009                         if (*what) {
1010                                 if (*kind)
1011                                         strbuf_addf(&note, "%s ", kind);
1012                                 strbuf_addf(&note, "'%s' of ", what);
1013                         }
1014                         switch (rm->fetch_head_status) {
1015                         case FETCH_HEAD_NOT_FOR_MERGE:
1016                                 merge_status_marker = "not-for-merge";
1017                                 /* fall-through */
1018                         case FETCH_HEAD_MERGE:
1019                                 fprintf(fp, "%s\t%s\t%s",
1020                                         oid_to_hex(&rm->old_oid),
1021                                         merge_status_marker,
1022                                         note.buf);
1023                                 for (i = 0; i < url_len; ++i)
1024                                         if ('\n' == url[i])
1025                                                 fputs("\\n", fp);
1026                                         else
1027                                                 fputc(url[i], fp);
1028                                 fputc('\n', fp);
1029                                 break;
1030                         default:
1031                                 /* do not write anything to FETCH_HEAD */
1032                                 break;
1033                         }
1034
1035                         strbuf_reset(&note);
1036                         if (ref) {
1037                                 rc |= update_local_ref(ref, what, rm, &note,
1038                                                        summary_width);
1039                                 free(ref);
1040                         } else if (write_fetch_head || dry_run) {
1041                                 /*
1042                                  * Display fetches written to FETCH_HEAD (or
1043                                  * would be written to FETCH_HEAD, if --dry-run
1044                                  * is set).
1045                                  */
1046                                 format_display(&note, '*',
1047                                                *kind ? kind : "branch", NULL,
1048                                                *what ? what : "HEAD",
1049                                                "FETCH_HEAD", summary_width);
1050                         }
1051                         if (note.len) {
1052                                 if (verbosity >= 0 && !shown_url) {
1053                                         fprintf(stderr, _("From %.*s\n"),
1054                                                         url_len, url);
1055                                         shown_url = 1;
1056                                 }
1057                                 if (verbosity >= 0)
1058                                         fprintf(stderr, " %s\n", note.buf);
1059                         }
1060                 }
1061         }
1062
1063         if (rc & STORE_REF_ERROR_DF_CONFLICT)
1064                 error(_("some local refs could not be updated; try running\n"
1065                       " 'git remote prune %s' to remove any old, conflicting "
1066                       "branches"), remote_name);
1067
1068         if (advice_fetch_show_forced_updates) {
1069                 if (!fetch_show_forced_updates) {
1070                         warning(_(warn_show_forced_updates));
1071                 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1072                         warning(_(warn_time_show_forced_updates),
1073                                 forced_updates_ms / 1000.0);
1074                 }
1075         }
1076
1077  abort:
1078         strbuf_release(&note);
1079         free(url);
1080         fclose(fp);
1081         return rc;
1082 }
1083
1084 /*
1085  * We would want to bypass the object transfer altogether if
1086  * everything we are going to fetch already exists and is connected
1087  * locally.
1088  */
1089 static int check_exist_and_connected(struct ref *ref_map)
1090 {
1091         struct ref *rm = ref_map;
1092         struct check_connected_options opt = CHECK_CONNECTED_INIT;
1093         struct ref *r;
1094
1095         /*
1096          * If we are deepening a shallow clone we already have these
1097          * objects reachable.  Running rev-list here will return with
1098          * a good (0) exit status and we'll bypass the fetch that we
1099          * really need to perform.  Claiming failure now will ensure
1100          * we perform the network exchange to deepen our history.
1101          */
1102         if (deepen)
1103                 return -1;
1104
1105         /*
1106          * check_connected() allows objects to merely be promised, but
1107          * we need all direct targets to exist.
1108          */
1109         for (r = rm; r; r = r->next) {
1110                 if (!has_object_file_with_flags(&r->old_oid,
1111                                                 OBJECT_INFO_SKIP_FETCH_OBJECT))
1112                         return -1;
1113         }
1114
1115         opt.quiet = 1;
1116         return check_connected(iterate_ref_map, &rm, &opt);
1117 }
1118
1119 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1120 {
1121         int ret = check_exist_and_connected(ref_map);
1122         if (ret) {
1123                 trace2_region_enter("fetch", "fetch_refs", the_repository);
1124                 ret = transport_fetch_refs(transport, ref_map);
1125                 trace2_region_leave("fetch", "fetch_refs", the_repository);
1126         }
1127         if (!ret)
1128                 /*
1129                  * Keep the new pack's ".keep" file around to allow the caller
1130                  * time to update refs to reference the new objects.
1131                  */
1132                 return 0;
1133         transport_unlock_pack(transport);
1134         return ret;
1135 }
1136
1137 /* Update local refs based on the ref values fetched from a remote */
1138 static int consume_refs(struct transport *transport, struct ref *ref_map)
1139 {
1140         int connectivity_checked = transport->smart_options
1141                 ? transport->smart_options->connectivity_checked : 0;
1142         int ret;
1143         trace2_region_enter("fetch", "consume_refs", the_repository);
1144         ret = store_updated_refs(transport->url,
1145                                  transport->remote->name,
1146                                  connectivity_checked,
1147                                  ref_map);
1148         transport_unlock_pack(transport);
1149         trace2_region_leave("fetch", "consume_refs", the_repository);
1150         return ret;
1151 }
1152
1153 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1154                       const char *raw_url)
1155 {
1156         int url_len, i, result = 0;
1157         struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1158         char *url;
1159         int summary_width = transport_summary_width(stale_refs);
1160         const char *dangling_msg = dry_run
1161                 ? _("   (%s will become dangling)")
1162                 : _("   (%s has become dangling)");
1163
1164         if (raw_url)
1165                 url = transport_anonymize_url(raw_url);
1166         else
1167                 url = xstrdup("foreign");
1168
1169         url_len = strlen(url);
1170         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1171                 ;
1172
1173         url_len = i + 1;
1174         if (4 < i && !strncmp(".git", url + i - 3, 4))
1175                 url_len = i - 3;
1176
1177         if (!dry_run) {
1178                 struct string_list refnames = STRING_LIST_INIT_NODUP;
1179
1180                 for (ref = stale_refs; ref; ref = ref->next)
1181                         string_list_append(&refnames, ref->name);
1182
1183                 result = delete_refs("fetch: prune", &refnames, 0);
1184                 string_list_clear(&refnames, 0);
1185         }
1186
1187         if (verbosity >= 0) {
1188                 for (ref = stale_refs; ref; ref = ref->next) {
1189                         struct strbuf sb = STRBUF_INIT;
1190                         if (!shown_url) {
1191                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
1192                                 shown_url = 1;
1193                         }
1194                         format_display(&sb, '-', _("[deleted]"), NULL,
1195                                        _("(none)"), prettify_refname(ref->name),
1196                                        summary_width);
1197                         fprintf(stderr, " %s\n",sb.buf);
1198                         strbuf_release(&sb);
1199                         warn_dangling_symref(stderr, dangling_msg, ref->name);
1200                 }
1201         }
1202
1203         free(url);
1204         free_refs(stale_refs);
1205         return result;
1206 }
1207
1208 static void check_not_current_branch(struct ref *ref_map)
1209 {
1210         struct branch *current_branch = branch_get(NULL);
1211
1212         if (is_bare_repository() || !current_branch)
1213                 return;
1214
1215         for (; ref_map; ref_map = ref_map->next)
1216                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1217                                         ref_map->peer_ref->name))
1218                         die(_("Refusing to fetch into current branch %s "
1219                             "of non-bare repository"), current_branch->refname);
1220 }
1221
1222 static int truncate_fetch_head(void)
1223 {
1224         const char *filename = git_path_fetch_head(the_repository);
1225         FILE *fp = fopen_for_writing(filename);
1226
1227         if (!fp)
1228                 return error_errno(_("cannot open %s"), filename);
1229         fclose(fp);
1230         return 0;
1231 }
1232
1233 static void set_option(struct transport *transport, const char *name, const char *value)
1234 {
1235         int r = transport_set_option(transport, name, value);
1236         if (r < 0)
1237                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1238                     name, value, transport->url);
1239         if (r > 0)
1240                 warning(_("Option \"%s\" is ignored for %s\n"),
1241                         name, transport->url);
1242 }
1243
1244
1245 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1246                    void *cb_data)
1247 {
1248         struct oid_array *oids = cb_data;
1249
1250         oid_array_append(oids, oid);
1251         return 0;
1252 }
1253
1254 static void add_negotiation_tips(struct git_transport_options *smart_options)
1255 {
1256         struct oid_array *oids = xcalloc(1, sizeof(*oids));
1257         int i;
1258
1259         for (i = 0; i < negotiation_tip.nr; i++) {
1260                 const char *s = negotiation_tip.items[i].string;
1261                 int old_nr;
1262                 if (!has_glob_specials(s)) {
1263                         struct object_id oid;
1264                         if (get_oid(s, &oid))
1265                                 die("%s is not a valid object", s);
1266                         oid_array_append(oids, &oid);
1267                         continue;
1268                 }
1269                 old_nr = oids->nr;
1270                 for_each_glob_ref(add_oid, s, oids);
1271                 if (old_nr == oids->nr)
1272                         warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1273                                 s);
1274         }
1275         smart_options->negotiation_tips = oids;
1276 }
1277
1278 static struct transport *prepare_transport(struct remote *remote, int deepen)
1279 {
1280         struct transport *transport;
1281
1282         transport = transport_get(remote, NULL);
1283         transport_set_verbosity(transport, verbosity, progress);
1284         transport->family = family;
1285         if (upload_pack)
1286                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1287         if (keep)
1288                 set_option(transport, TRANS_OPT_KEEP, "yes");
1289         if (depth)
1290                 set_option(transport, TRANS_OPT_DEPTH, depth);
1291         if (deepen && deepen_since)
1292                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1293         if (deepen && deepen_not.nr)
1294                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1295                            (const char *)&deepen_not);
1296         if (deepen_relative)
1297                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1298         if (update_shallow)
1299                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1300         if (filter_options.choice) {
1301                 const char *spec =
1302                         expand_list_objects_filter_spec(&filter_options);
1303                 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1304                 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1305         }
1306         if (negotiation_tip.nr) {
1307                 if (transport->smart_options)
1308                         add_negotiation_tips(transport->smart_options);
1309                 else
1310                         warning("Ignoring --negotiation-tip because the protocol does not support it.");
1311         }
1312         return transport;
1313 }
1314
1315 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1316 {
1317         int cannot_reuse;
1318
1319         /*
1320          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1321          * when remote helper is used (setting it to an empty string
1322          * is not unsetting). We could extend the remote helper
1323          * protocol for that, but for now, just force a new connection
1324          * without deepen-since. Similar story for deepen-not.
1325          */
1326         cannot_reuse = transport->cannot_reuse ||
1327                 deepen_since || deepen_not.nr;
1328         if (cannot_reuse) {
1329                 gsecondary = prepare_transport(transport->remote, 0);
1330                 transport = gsecondary;
1331         }
1332
1333         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1334         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1335         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1336         if (!fetch_refs(transport, ref_map))
1337                 consume_refs(transport, ref_map);
1338
1339         if (gsecondary) {
1340                 transport_disconnect(gsecondary);
1341                 gsecondary = NULL;
1342         }
1343 }
1344
1345 static int do_fetch(struct transport *transport,
1346                     struct refspec *rs)
1347 {
1348         struct ref *ref_map;
1349         int autotags = (transport->remote->fetch_tags == 1);
1350         int retcode = 0;
1351         const struct ref *remote_refs;
1352         struct strvec ref_prefixes = STRVEC_INIT;
1353         int must_list_refs = 1;
1354
1355         if (tags == TAGS_DEFAULT) {
1356                 if (transport->remote->fetch_tags == 2)
1357                         tags = TAGS_SET;
1358                 if (transport->remote->fetch_tags == -1)
1359                         tags = TAGS_UNSET;
1360         }
1361
1362         /* if not appending, truncate FETCH_HEAD */
1363         if (!append && write_fetch_head) {
1364                 retcode = truncate_fetch_head();
1365                 if (retcode)
1366                         goto cleanup;
1367         }
1368
1369         if (rs->nr) {
1370                 int i;
1371
1372                 refspec_ref_prefixes(rs, &ref_prefixes);
1373
1374                 /*
1375                  * We can avoid listing refs if all of them are exact
1376                  * OIDs
1377                  */
1378                 must_list_refs = 0;
1379                 for (i = 0; i < rs->nr; i++) {
1380                         if (!rs->items[i].exact_sha1) {
1381                                 must_list_refs = 1;
1382                                 break;
1383                         }
1384                 }
1385         } else if (transport->remote && transport->remote->fetch.nr)
1386                 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1387
1388         if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1389                 must_list_refs = 1;
1390                 if (ref_prefixes.nr)
1391                         strvec_push(&ref_prefixes, "refs/tags/");
1392         }
1393
1394         if (must_list_refs) {
1395                 trace2_region_enter("fetch", "remote_refs", the_repository);
1396                 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1397                 trace2_region_leave("fetch", "remote_refs", the_repository);
1398         } else
1399                 remote_refs = NULL;
1400
1401         strvec_clear(&ref_prefixes);
1402
1403         ref_map = get_ref_map(transport->remote, remote_refs, rs,
1404                               tags, &autotags);
1405         if (!update_head_ok)
1406                 check_not_current_branch(ref_map);
1407
1408         if (tags == TAGS_DEFAULT && autotags)
1409                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1410         if (prune) {
1411                 /*
1412                  * We only prune based on refspecs specified
1413                  * explicitly (via command line or configuration); we
1414                  * don't care whether --tags was specified.
1415                  */
1416                 if (rs->nr) {
1417                         prune_refs(rs, ref_map, transport->url);
1418                 } else {
1419                         prune_refs(&transport->remote->fetch,
1420                                    ref_map,
1421                                    transport->url);
1422                 }
1423         }
1424         if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1425                 free_refs(ref_map);
1426                 retcode = 1;
1427                 goto cleanup;
1428         }
1429
1430         if (set_upstream) {
1431                 struct branch *branch = branch_get("HEAD");
1432                 struct ref *rm;
1433                 struct ref *source_ref = NULL;
1434
1435                 /*
1436                  * We're setting the upstream configuration for the
1437                  * current branch. The relevant upstream is the
1438                  * fetched branch that is meant to be merged with the
1439                  * current one, i.e. the one fetched to FETCH_HEAD.
1440                  *
1441                  * When there are several such branches, consider the
1442                  * request ambiguous and err on the safe side by doing
1443                  * nothing and just emit a warning.
1444                  */
1445                 for (rm = ref_map; rm; rm = rm->next) {
1446                         if (!rm->peer_ref) {
1447                                 if (source_ref) {
1448                                         warning(_("multiple branches detected, incompatible with --set-upstream"));
1449                                         goto skip;
1450                                 } else {
1451                                         source_ref = rm;
1452                                 }
1453                         }
1454                 }
1455                 if (source_ref) {
1456                         if (!strcmp(source_ref->name, "HEAD") ||
1457                             starts_with(source_ref->name, "refs/heads/"))
1458                                 install_branch_config(0,
1459                                                       branch->name,
1460                                                       transport->remote->name,
1461                                                       source_ref->name);
1462                         else if (starts_with(source_ref->name, "refs/remotes/"))
1463                                 warning(_("not setting upstream for a remote remote-tracking branch"));
1464                         else if (starts_with(source_ref->name, "refs/tags/"))
1465                                 warning(_("not setting upstream for a remote tag"));
1466                         else
1467                                 warning(_("unknown branch type"));
1468                 } else {
1469                         warning(_("no source branch found.\n"
1470                                 "you need to specify exactly one branch with the --set-upstream option."));
1471                 }
1472         }
1473  skip:
1474         free_refs(ref_map);
1475
1476         /* if neither --no-tags nor --tags was specified, do automated tag
1477          * following ... */
1478         if (tags == TAGS_DEFAULT && autotags) {
1479                 struct ref **tail = &ref_map;
1480                 ref_map = NULL;
1481                 find_non_local_tags(remote_refs, &ref_map, &tail);
1482                 if (ref_map)
1483                         backfill_tags(transport, ref_map);
1484                 free_refs(ref_map);
1485         }
1486
1487  cleanup:
1488         return retcode;
1489 }
1490
1491 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1492 {
1493         struct string_list *list = priv;
1494         if (!remote->skip_default_update)
1495                 string_list_append(list, remote->name);
1496         return 0;
1497 }
1498
1499 struct remote_group_data {
1500         const char *name;
1501         struct string_list *list;
1502 };
1503
1504 static int get_remote_group(const char *key, const char *value, void *priv)
1505 {
1506         struct remote_group_data *g = priv;
1507
1508         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1509                 /* split list by white space */
1510                 while (*value) {
1511                         size_t wordlen = strcspn(value, " \t\n");
1512
1513                         if (wordlen >= 1)
1514                                 string_list_append_nodup(g->list,
1515                                                    xstrndup(value, wordlen));
1516                         value += wordlen + (value[wordlen] != '\0');
1517                 }
1518         }
1519
1520         return 0;
1521 }
1522
1523 static int add_remote_or_group(const char *name, struct string_list *list)
1524 {
1525         int prev_nr = list->nr;
1526         struct remote_group_data g;
1527         g.name = name; g.list = list;
1528
1529         git_config(get_remote_group, &g);
1530         if (list->nr == prev_nr) {
1531                 struct remote *remote = remote_get(name);
1532                 if (!remote_is_configured(remote, 0))
1533                         return 0;
1534                 string_list_append(list, remote->name);
1535         }
1536         return 1;
1537 }
1538
1539 static void add_options_to_argv(struct strvec *argv)
1540 {
1541         if (dry_run)
1542                 strvec_push(argv, "--dry-run");
1543         if (prune != -1)
1544                 strvec_push(argv, prune ? "--prune" : "--no-prune");
1545         if (prune_tags != -1)
1546                 strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1547         if (update_head_ok)
1548                 strvec_push(argv, "--update-head-ok");
1549         if (force)
1550                 strvec_push(argv, "--force");
1551         if (keep)
1552                 strvec_push(argv, "--keep");
1553         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1554                 strvec_push(argv, "--recurse-submodules");
1555         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1556                 strvec_push(argv, "--recurse-submodules=on-demand");
1557         if (tags == TAGS_SET)
1558                 strvec_push(argv, "--tags");
1559         else if (tags == TAGS_UNSET)
1560                 strvec_push(argv, "--no-tags");
1561         if (verbosity >= 2)
1562                 strvec_push(argv, "-v");
1563         if (verbosity >= 1)
1564                 strvec_push(argv, "-v");
1565         else if (verbosity < 0)
1566                 strvec_push(argv, "-q");
1567         if (family == TRANSPORT_FAMILY_IPV4)
1568                 strvec_push(argv, "--ipv4");
1569         else if (family == TRANSPORT_FAMILY_IPV6)
1570                 strvec_push(argv, "--ipv6");
1571 }
1572
1573 /* Fetch multiple remotes in parallel */
1574
1575 struct parallel_fetch_state {
1576         const char **argv;
1577         struct string_list *remotes;
1578         int next, result;
1579 };
1580
1581 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1582                              void *cb, void **task_cb)
1583 {
1584         struct parallel_fetch_state *state = cb;
1585         char *remote;
1586
1587         if (state->next < 0 || state->next >= state->remotes->nr)
1588                 return 0;
1589
1590         remote = state->remotes->items[state->next++].string;
1591         *task_cb = remote;
1592
1593         strvec_pushv(&cp->args, state->argv);
1594         strvec_push(&cp->args, remote);
1595         cp->git_cmd = 1;
1596
1597         if (verbosity >= 0)
1598                 printf(_("Fetching %s\n"), remote);
1599
1600         return 1;
1601 }
1602
1603 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1604 {
1605         struct parallel_fetch_state *state = cb;
1606         const char *remote = task_cb;
1607
1608         state->result = error(_("Could not fetch %s"), remote);
1609
1610         return 0;
1611 }
1612
1613 static int fetch_finished(int result, struct strbuf *out,
1614                           void *cb, void *task_cb)
1615 {
1616         struct parallel_fetch_state *state = cb;
1617         const char *remote = task_cb;
1618
1619         if (result) {
1620                 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1621                             remote, result);
1622                 state->result = -1;
1623         }
1624
1625         return 0;
1626 }
1627
1628 static int fetch_multiple(struct string_list *list, int max_children)
1629 {
1630         int i, result = 0;
1631         struct strvec argv = STRVEC_INIT;
1632
1633         if (!append && write_fetch_head) {
1634                 int errcode = truncate_fetch_head();
1635                 if (errcode)
1636                         return errcode;
1637         }
1638
1639         strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1640                      "--no-write-commit-graph", NULL);
1641         add_options_to_argv(&argv);
1642
1643         if (max_children != 1 && list->nr != 1) {
1644                 struct parallel_fetch_state state = { argv.v, list, 0, 0 };
1645
1646                 strvec_push(&argv, "--end-of-options");
1647                 result = run_processes_parallel_tr2(max_children,
1648                                                     &fetch_next_remote,
1649                                                     &fetch_failed_to_start,
1650                                                     &fetch_finished,
1651                                                     &state,
1652                                                     "fetch", "parallel/fetch");
1653
1654                 if (!result)
1655                         result = state.result;
1656         } else
1657                 for (i = 0; i < list->nr; i++) {
1658                         const char *name = list->items[i].string;
1659                         strvec_push(&argv, name);
1660                         if (verbosity >= 0)
1661                                 printf(_("Fetching %s\n"), name);
1662                         if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
1663                                 error(_("Could not fetch %s"), name);
1664                                 result = 1;
1665                         }
1666                         strvec_pop(&argv);
1667                 }
1668
1669         strvec_clear(&argv);
1670         return !!result;
1671 }
1672
1673 /*
1674  * Fetching from the promisor remote should use the given filter-spec
1675  * or inherit the default filter-spec from the config.
1676  */
1677 static inline void fetch_one_setup_partial(struct remote *remote)
1678 {
1679         /*
1680          * Explicit --no-filter argument overrides everything, regardless
1681          * of any prior partial clones and fetches.
1682          */
1683         if (filter_options.no_filter)
1684                 return;
1685
1686         /*
1687          * If no prior partial clone/fetch and the current fetch DID NOT
1688          * request a partial-fetch, do a normal fetch.
1689          */
1690         if (!has_promisor_remote() && !filter_options.choice)
1691                 return;
1692
1693         /*
1694          * If this is a partial-fetch request, we enable partial on
1695          * this repo if not already enabled and remember the given
1696          * filter-spec as the default for subsequent fetches to this
1697          * remote if there is currently no default filter-spec.
1698          */
1699         if (filter_options.choice) {
1700                 partial_clone_register(remote->name, &filter_options);
1701                 return;
1702         }
1703
1704         /*
1705          * Do a partial-fetch from the promisor remote using either the
1706          * explicitly given filter-spec or inherit the filter-spec from
1707          * the config.
1708          */
1709         if (!filter_options.choice)
1710                 partial_clone_get_default_filter_spec(&filter_options, remote->name);
1711         return;
1712 }
1713
1714 static int fetch_one(struct remote *remote, int argc, const char **argv,
1715                      int prune_tags_ok, int use_stdin_refspecs)
1716 {
1717         struct refspec rs = REFSPEC_INIT_FETCH;
1718         int i;
1719         int exit_code;
1720         int maybe_prune_tags;
1721         int remote_via_config = remote_is_configured(remote, 0);
1722
1723         if (!remote)
1724                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1725                     "remote name from which new revisions should be fetched."));
1726
1727         gtransport = prepare_transport(remote, 1);
1728
1729         if (prune < 0) {
1730                 /* no command line request */
1731                 if (0 <= remote->prune)
1732                         prune = remote->prune;
1733                 else if (0 <= fetch_prune_config)
1734                         prune = fetch_prune_config;
1735                 else
1736                         prune = PRUNE_BY_DEFAULT;
1737         }
1738
1739         if (prune_tags < 0) {
1740                 /* no command line request */
1741                 if (0 <= remote->prune_tags)
1742                         prune_tags = remote->prune_tags;
1743                 else if (0 <= fetch_prune_tags_config)
1744                         prune_tags = fetch_prune_tags_config;
1745                 else
1746                         prune_tags = PRUNE_TAGS_BY_DEFAULT;
1747         }
1748
1749         maybe_prune_tags = prune_tags_ok && prune_tags;
1750         if (maybe_prune_tags && remote_via_config)
1751                 refspec_append(&remote->fetch, TAG_REFSPEC);
1752
1753         if (maybe_prune_tags && (argc || !remote_via_config))
1754                 refspec_append(&rs, TAG_REFSPEC);
1755
1756         for (i = 0; i < argc; i++) {
1757                 if (!strcmp(argv[i], "tag")) {
1758                         i++;
1759                         if (i >= argc)
1760                                 die(_("You need to specify a tag name."));
1761
1762                         refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
1763                                         argv[i], argv[i]);
1764                 } else {
1765                         refspec_append(&rs, argv[i]);
1766                 }
1767         }
1768
1769         if (use_stdin_refspecs) {
1770                 struct strbuf line = STRBUF_INIT;
1771                 while (strbuf_getline_lf(&line, stdin) != EOF)
1772                         refspec_append(&rs, line.buf);
1773                 strbuf_release(&line);
1774         }
1775
1776         if (server_options.nr)
1777                 gtransport->server_options = &server_options;
1778
1779         sigchain_push_common(unlock_pack_on_signal);
1780         atexit(unlock_pack);
1781         sigchain_push(SIGPIPE, SIG_IGN);
1782         exit_code = do_fetch(gtransport, &rs);
1783         sigchain_pop(SIGPIPE);
1784         refspec_clear(&rs);
1785         transport_disconnect(gtransport);
1786         gtransport = NULL;
1787         return exit_code;
1788 }
1789
1790 int cmd_fetch(int argc, const char **argv, const char *prefix)
1791 {
1792         int i;
1793         struct string_list list = STRING_LIST_INIT_DUP;
1794         struct remote *remote = NULL;
1795         int result = 0;
1796         int prune_tags_ok = 1;
1797
1798         packet_trace_identity("fetch");
1799
1800         /* Record the command line for the reflog */
1801         strbuf_addstr(&default_rla, "fetch");
1802         for (i = 1; i < argc; i++) {
1803                 /* This handles non-URLs gracefully */
1804                 char *anon = transport_anonymize_url(argv[i]);
1805
1806                 strbuf_addf(&default_rla, " %s", anon);
1807                 free(anon);
1808         }
1809
1810         git_config(git_fetch_config, NULL);
1811
1812         argc = parse_options(argc, argv, prefix,
1813                              builtin_fetch_options, builtin_fetch_usage, 0);
1814         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1815                 int *sfjc = submodule_fetch_jobs_config == -1
1816                             ? &submodule_fetch_jobs_config : NULL;
1817                 int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
1818                           ? &recurse_submodules : NULL;
1819
1820                 fetch_config_from_gitmodules(sfjc, rs);
1821         }
1822
1823         if (deepen_relative) {
1824                 if (deepen_relative < 0)
1825                         die(_("Negative depth in --deepen is not supported"));
1826                 if (depth)
1827                         die(_("--deepen and --depth are mutually exclusive"));
1828                 depth = xstrfmt("%d", deepen_relative);
1829         }
1830         if (unshallow) {
1831                 if (depth)
1832                         die(_("--depth and --unshallow cannot be used together"));
1833                 else if (!is_repository_shallow(the_repository))
1834                         die(_("--unshallow on a complete repository does not make sense"));
1835                 else
1836                         depth = xstrfmt("%d", INFINITE_DEPTH);
1837         }
1838
1839         /* no need to be strict, transport_set_option() will validate it again */
1840         if (depth && atoi(depth) < 1)
1841                 die(_("depth %s is not a positive number"), depth);
1842         if (depth || deepen_since || deepen_not.nr)
1843                 deepen = 1;
1844
1845         /* FETCH_HEAD never gets updated in --dry-run mode */
1846         if (dry_run)
1847                 write_fetch_head = 0;
1848
1849         if (all) {
1850                 if (argc == 1)
1851                         die(_("fetch --all does not take a repository argument"));
1852                 else if (argc > 1)
1853                         die(_("fetch --all does not make sense with refspecs"));
1854                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1855         } else if (argc == 0) {
1856                 /* No arguments -- use default remote */
1857                 remote = remote_get(NULL);
1858         } else if (multiple) {
1859                 /* All arguments are assumed to be remotes or groups */
1860                 for (i = 0; i < argc; i++)
1861                         if (!add_remote_or_group(argv[i], &list))
1862                                 die(_("No such remote or remote group: %s"), argv[i]);
1863         } else {
1864                 /* Single remote or group */
1865                 (void) add_remote_or_group(argv[0], &list);
1866                 if (list.nr > 1) {
1867                         /* More than one remote */
1868                         if (argc > 1)
1869                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1870                 } else {
1871                         /* Zero or one remotes */
1872                         remote = remote_get(argv[0]);
1873                         prune_tags_ok = (argc == 1);
1874                         argc--;
1875                         argv++;
1876                 }
1877         }
1878
1879         if (remote) {
1880                 if (filter_options.choice || has_promisor_remote())
1881                         fetch_one_setup_partial(remote);
1882                 result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
1883         } else {
1884                 int max_children = max_jobs;
1885
1886                 if (filter_options.choice)
1887                         die(_("--filter can only be used with the remote "
1888                               "configured in extensions.partialclone"));
1889
1890                 if (stdin_refspecs)
1891                         die(_("--stdin can only be used when fetching "
1892                               "from one remote"));
1893
1894                 if (max_children < 0)
1895                         max_children = fetch_parallel_config;
1896
1897                 /* TODO should this also die if we have a previous partial-clone? */
1898                 result = fetch_multiple(&list, max_children);
1899         }
1900
1901         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1902                 struct strvec options = STRVEC_INIT;
1903                 int max_children = max_jobs;
1904
1905                 if (max_children < 0)
1906                         max_children = submodule_fetch_jobs_config;
1907                 if (max_children < 0)
1908                         max_children = fetch_parallel_config;
1909
1910                 add_options_to_argv(&options);
1911                 result = fetch_populated_submodules(the_repository,
1912                                                     &options,
1913                                                     submodule_prefix,
1914                                                     recurse_submodules,
1915                                                     recurse_submodules_default,
1916                                                     verbosity < 0,
1917                                                     max_children);
1918                 strvec_clear(&options);
1919         }
1920
1921         string_list_clear(&list, 0);
1922
1923         prepare_repo_settings(the_repository);
1924         if (fetch_write_commit_graph > 0 ||
1925             (fetch_write_commit_graph < 0 &&
1926              the_repository->settings.fetch_write_commit_graph)) {
1927                 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
1928
1929                 if (progress)
1930                         commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
1931
1932                 write_commit_graph_reachable(the_repository->objects->odb,
1933                                              commit_graph_flags,
1934                                              NULL);
1935         }
1936
1937         close_object_store(the_repository->objects);
1938
1939         if (enable_auto_gc)
1940                 run_auto_maintenance(verbosity < 0);
1941
1942         return result;
1943 }