builtin / fetch.con commit Merge branch 'sd/stash-wo-user-name' (eacdb4d)
   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 "commit.h"
  11#include "builtin.h"
  12#include "string-list.h"
  13#include "remote.h"
  14#include "transport.h"
  15#include "run-command.h"
  16#include "parse-options.h"
  17#include "sigchain.h"
  18#include "submodule-config.h"
  19#include "submodule.h"
  20#include "connected.h"
  21#include "argv-array.h"
  22#include "utf8.h"
  23#include "packfile.h"
  24#include "list-objects-filter-options.h"
  25#include "commit-reach.h"
  26
  27static const char * const builtin_fetch_usage[] = {
  28        N_("git fetch [<options>] [<repository> [<refspec>...]]"),
  29        N_("git fetch [<options>] <group>"),
  30        N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
  31        N_("git fetch --all [<options>]"),
  32        NULL
  33};
  34
  35enum {
  36        TAGS_UNSET = 0,
  37        TAGS_DEFAULT = 1,
  38        TAGS_SET = 2
  39};
  40
  41static int fetch_prune_config = -1; /* unspecified */
  42static int prune = -1; /* unspecified */
  43#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
  44
  45static int fetch_prune_tags_config = -1; /* unspecified */
  46static int prune_tags = -1; /* unspecified */
  47#define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
  48
  49static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
  50static int progress = -1;
  51static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  52static int max_children = 1;
  53static enum transport_family family;
  54static const char *depth;
  55static const char *deepen_since;
  56static const char *upload_pack;
  57static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
  58static struct strbuf default_rla = STRBUF_INIT;
  59static struct transport *gtransport;
  60static struct transport *gsecondary;
  61static const char *submodule_prefix = "";
  62static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  63static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
  64static int shown_url = 0;
  65static struct refspec refmap = REFSPEC_INIT_FETCH;
  66static struct list_objects_filter_options filter_options;
  67static struct string_list server_options = STRING_LIST_INIT_DUP;
  68static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
  69
  70static int git_fetch_config(const char *k, const char *v, void *cb)
  71{
  72        if (!strcmp(k, "fetch.prune")) {
  73                fetch_prune_config = git_config_bool(k, v);
  74                return 0;
  75        }
  76
  77        if (!strcmp(k, "fetch.prunetags")) {
  78                fetch_prune_tags_config = git_config_bool(k, v);
  79                return 0;
  80        }
  81
  82        if (!strcmp(k, "submodule.recurse")) {
  83                int r = git_config_bool(k, v) ?
  84                        RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
  85                recurse_submodules = r;
  86        }
  87
  88        if (!strcmp(k, "submodule.fetchjobs")) {
  89                max_children = parse_submodule_fetchjobs(k, v);
  90                return 0;
  91        } else if (!strcmp(k, "fetch.recursesubmodules")) {
  92                recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
  93                return 0;
  94        }
  95
  96        return git_default_config(k, v, cb);
  97}
  98
  99static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
 100{
 101        BUG_ON_OPT_NEG(unset);
 102
 103        /*
 104         * "git fetch --refmap='' origin foo"
 105         * can be used to tell the command not to store anywhere
 106         */
 107        refspec_append(&refmap, arg);
 108
 109        return 0;
 110}
 111
 112static struct option builtin_fetch_options[] = {
 113        OPT__VERBOSITY(&verbosity),
 114        OPT_BOOL(0, "all", &all,
 115                 N_("fetch from all remotes")),
 116        OPT_BOOL('a', "append", &append,
 117                 N_("append to .git/FETCH_HEAD instead of overwriting")),
 118        OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 119                   N_("path to upload pack on remote end")),
 120        OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
 121        OPT_BOOL('m', "multiple", &multiple,
 122                 N_("fetch from multiple remotes")),
 123        OPT_SET_INT('t', "tags", &tags,
 124                    N_("fetch all tags and associated objects"), TAGS_SET),
 125        OPT_SET_INT('n', NULL, &tags,
 126                    N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 127        OPT_INTEGER('j', "jobs", &max_children,
 128                    N_("number of submodules fetched in parallel")),
 129        OPT_BOOL('p', "prune", &prune,
 130                 N_("prune remote-tracking branches no longer on remote")),
 131        OPT_BOOL('P', "prune-tags", &prune_tags,
 132                 N_("prune local tags no longer on remote and clobber changed tags")),
 133        { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
 134                    N_("control recursive fetching of submodules"),
 135                    PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
 136        OPT_BOOL(0, "dry-run", &dry_run,
 137                 N_("dry run")),
 138        OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 139        OPT_BOOL('u', "update-head-ok", &update_head_ok,
 140                    N_("allow updating of HEAD ref")),
 141        OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 142        OPT_STRING(0, "depth", &depth, N_("depth"),
 143                   N_("deepen history of shallow clone")),
 144        OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
 145                   N_("deepen history of shallow repository based on time")),
 146        OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
 147                        N_("deepen history of shallow clone, excluding rev")),
 148        OPT_INTEGER(0, "deepen", &deepen_relative,
 149                    N_("deepen history of shallow clone")),
 150        OPT_SET_INT_F(0, "unshallow", &unshallow,
 151                      N_("convert to a complete repository"),
 152                      1, PARSE_OPT_NONEG),
 153        { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 154                   N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 155        { OPTION_CALLBACK, 0, "recurse-submodules-default",
 156                   &recurse_submodules_default, N_("on-demand"),
 157                   N_("default for recursive fetching of submodules "
 158                      "(lower priority than config files)"),
 159                   PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
 160        OPT_BOOL(0, "update-shallow", &update_shallow,
 161                 N_("accept refs that update .git/shallow")),
 162        { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
 163          N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
 164        OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
 165        OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 166                        TRANSPORT_FAMILY_IPV4),
 167        OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 168                        TRANSPORT_FAMILY_IPV6),
 169        OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
 170                        N_("report that we have only objects reachable from this object")),
 171        OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 172        OPT_END()
 173};
 174
 175static void unlock_pack(void)
 176{
 177        if (gtransport)
 178                transport_unlock_pack(gtransport);
 179        if (gsecondary)
 180                transport_unlock_pack(gsecondary);
 181}
 182
 183static void unlock_pack_on_signal(int signo)
 184{
 185        unlock_pack();
 186        sigchain_pop(signo);
 187        raise(signo);
 188}
 189
 190static void add_merge_config(struct ref **head,
 191                           const struct ref *remote_refs,
 192                           struct branch *branch,
 193                           struct ref ***tail)
 194{
 195        int i;
 196
 197        for (i = 0; i < branch->merge_nr; i++) {
 198                struct ref *rm, **old_tail = *tail;
 199                struct refspec_item refspec;
 200
 201                for (rm = *head; rm; rm = rm->next) {
 202                        if (branch_merge_matches(branch, i, rm->name)) {
 203                                rm->fetch_head_status = FETCH_HEAD_MERGE;
 204                                break;
 205                        }
 206                }
 207                if (rm)
 208                        continue;
 209
 210                /*
 211                 * Not fetched to a remote-tracking branch?  We need to fetch
 212                 * it anyway to allow this branch's "branch.$name.merge"
 213                 * to be honored by 'git pull', but we do not have to
 214                 * fail if branch.$name.merge is misconfigured to point
 215                 * at a nonexisting branch.  If we were indeed called by
 216                 * 'git pull', it will notice the misconfiguration because
 217                 * there is no entry in the resulting FETCH_HEAD marked
 218                 * for merging.
 219                 */
 220                memset(&refspec, 0, sizeof(refspec));
 221                refspec.src = branch->merge[i]->src;
 222                get_fetch_map(remote_refs, &refspec, tail, 1);
 223                for (rm = *old_tail; rm; rm = rm->next)
 224                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 225        }
 226}
 227
 228static int will_fetch(struct ref **head, const unsigned char *sha1)
 229{
 230        struct ref *rm = *head;
 231        while (rm) {
 232                if (hasheq(rm->old_oid.hash, sha1))
 233                        return 1;
 234                rm = rm->next;
 235        }
 236        return 0;
 237}
 238
 239struct refname_hash_entry {
 240        struct hashmap_entry ent; /* must be the first member */
 241        struct object_id oid;
 242        char refname[FLEX_ARRAY];
 243};
 244
 245static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
 246                                  const void *e1_,
 247                                  const void *e2_,
 248                                  const void *keydata)
 249{
 250        const struct refname_hash_entry *e1 = e1_;
 251        const struct refname_hash_entry *e2 = e2_;
 252
 253        return strcmp(e1->refname, keydata ? keydata : e2->refname);
 254}
 255
 256static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
 257                                                   const char *refname,
 258                                                   const struct object_id *oid)
 259{
 260        struct refname_hash_entry *ent;
 261        size_t len = strlen(refname);
 262
 263        FLEX_ALLOC_MEM(ent, refname, refname, len);
 264        hashmap_entry_init(ent, strhash(refname));
 265        oidcpy(&ent->oid, oid);
 266        hashmap_add(map, ent);
 267        return ent;
 268}
 269
 270static int add_one_refname(const char *refname,
 271                           const struct object_id *oid,
 272                           int flag, void *cbdata)
 273{
 274        struct hashmap *refname_map = cbdata;
 275
 276        (void) refname_hash_add(refname_map, refname, oid);
 277        return 0;
 278}
 279
 280static void refname_hash_init(struct hashmap *map)
 281{
 282        hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
 283}
 284
 285static int refname_hash_exists(struct hashmap *map, const char *refname)
 286{
 287        return !!hashmap_get_from_hash(map, strhash(refname), refname);
 288}
 289
 290static void find_non_local_tags(const struct ref *refs,
 291                                struct ref **head,
 292                                struct ref ***tail)
 293{
 294        struct hashmap existing_refs;
 295        struct hashmap remote_refs;
 296        struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
 297        struct string_list_item *remote_ref_item;
 298        const struct ref *ref;
 299        struct refname_hash_entry *item = NULL;
 300
 301        refname_hash_init(&existing_refs);
 302        refname_hash_init(&remote_refs);
 303
 304        for_each_ref(add_one_refname, &existing_refs);
 305        for (ref = refs; ref; ref = ref->next) {
 306                if (!starts_with(ref->name, "refs/tags/"))
 307                        continue;
 308
 309                /*
 310                 * The peeled ref always follows the matching base
 311                 * ref, so if we see a peeled ref that we don't want
 312                 * to fetch then we can mark the ref entry in the list
 313                 * as one to ignore by setting util to NULL.
 314                 */
 315                if (ends_with(ref->name, "^{}")) {
 316                        if (item &&
 317                            !has_object_file_with_flags(&ref->old_oid,
 318                                                        OBJECT_INFO_QUICK) &&
 319                            !will_fetch(head, ref->old_oid.hash) &&
 320                            !has_sha1_file_with_flags(item->oid.hash,
 321                                                      OBJECT_INFO_QUICK) &&
 322                            !will_fetch(head, item->oid.hash))
 323                                oidclr(&item->oid);
 324                        item = NULL;
 325                        continue;
 326                }
 327
 328                /*
 329                 * If item is non-NULL here, then we previously saw a
 330                 * ref not followed by a peeled reference, so we need
 331                 * to check if it is a lightweight tag that we want to
 332                 * fetch.
 333                 */
 334                if (item &&
 335                    !has_sha1_file_with_flags(item->oid.hash, OBJECT_INFO_QUICK) &&
 336                    !will_fetch(head, item->oid.hash))
 337                        oidclr(&item->oid);
 338
 339                item = NULL;
 340
 341                /* skip duplicates and refs that we already have */
 342                if (refname_hash_exists(&remote_refs, ref->name) ||
 343                    refname_hash_exists(&existing_refs, ref->name))
 344                        continue;
 345
 346                item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
 347                string_list_insert(&remote_refs_list, ref->name);
 348        }
 349        hashmap_free(&existing_refs, 1);
 350
 351        /*
 352         * We may have a final lightweight tag that needs to be
 353         * checked to see if it needs fetching.
 354         */
 355        if (item &&
 356            !has_sha1_file_with_flags(item->oid.hash, OBJECT_INFO_QUICK) &&
 357            !will_fetch(head, item->oid.hash))
 358                oidclr(&item->oid);
 359
 360        /*
 361         * For all the tags in the remote_refs_list,
 362         * add them to the list of refs to be fetched
 363         */
 364        for_each_string_list_item(remote_ref_item, &remote_refs_list) {
 365                const char *refname = remote_ref_item->string;
 366
 367                item = hashmap_get_from_hash(&remote_refs, strhash(refname), refname);
 368                if (!item)
 369                        BUG("unseen remote ref?");
 370
 371                /* Unless we have already decided to ignore this item... */
 372                if (!is_null_oid(&item->oid)) {
 373                        struct ref *rm = alloc_ref(item->refname);
 374                        rm->peer_ref = alloc_ref(item->refname);
 375                        oidcpy(&rm->old_oid, &item->oid);
 376                        **tail = rm;
 377                        *tail = &rm->next;
 378                }
 379        }
 380        hashmap_free(&remote_refs, 1);
 381        string_list_clear(&remote_refs_list, 0);
 382}
 383
 384static struct ref *get_ref_map(struct remote *remote,
 385                               const struct ref *remote_refs,
 386                               struct refspec *rs,
 387                               int tags, int *autotags)
 388{
 389        int i;
 390        struct ref *rm;
 391        struct ref *ref_map = NULL;
 392        struct ref **tail = &ref_map;
 393
 394        /* opportunistically-updated references: */
 395        struct ref *orefs = NULL, **oref_tail = &orefs;
 396
 397        struct hashmap existing_refs;
 398
 399        if (rs->nr) {
 400                struct refspec *fetch_refspec;
 401
 402                for (i = 0; i < rs->nr; i++) {
 403                        get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
 404                        if (rs->items[i].dst && rs->items[i].dst[0])
 405                                *autotags = 1;
 406                }
 407                /* Merge everything on the command line (but not --tags) */
 408                for (rm = ref_map; rm; rm = rm->next)
 409                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 410
 411                /*
 412                 * For any refs that we happen to be fetching via
 413                 * command-line arguments, the destination ref might
 414                 * have been missing or have been different than the
 415                 * remote-tracking ref that would be derived from the
 416                 * configured refspec.  In these cases, we want to
 417                 * take the opportunity to update their configured
 418                 * remote-tracking reference.  However, we do not want
 419                 * to mention these entries in FETCH_HEAD at all, as
 420                 * they would simply be duplicates of existing
 421                 * entries, so we set them FETCH_HEAD_IGNORE below.
 422                 *
 423                 * We compute these entries now, based only on the
 424                 * refspecs specified on the command line.  But we add
 425                 * them to the list following the refspecs resulting
 426                 * from the tags option so that one of the latter,
 427                 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 428                 * by ref_remove_duplicates() in favor of one of these
 429                 * opportunistic entries with FETCH_HEAD_IGNORE.
 430                 */
 431                if (refmap.nr)
 432                        fetch_refspec = &refmap;
 433                else
 434                        fetch_refspec = &remote->fetch;
 435
 436                for (i = 0; i < fetch_refspec->nr; i++)
 437                        get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
 438        } else if (refmap.nr) {
 439                die("--refmap option is only meaningful with command-line refspec(s).");
 440        } else {
 441                /* Use the defaults */
 442                struct branch *branch = branch_get(NULL);
 443                int has_merge = branch_has_merge_config(branch);
 444                if (remote &&
 445                    (remote->fetch.nr ||
 446                     /* Note: has_merge implies non-NULL branch->remote_name */
 447                     (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 448                        for (i = 0; i < remote->fetch.nr; i++) {
 449                                get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
 450                                if (remote->fetch.items[i].dst &&
 451                                    remote->fetch.items[i].dst[0])
 452                                        *autotags = 1;
 453                                if (!i && !has_merge && ref_map &&
 454                                    !remote->fetch.items[0].pattern)
 455                                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 456                        }
 457                        /*
 458                         * if the remote we're fetching from is the same
 459                         * as given in branch.<name>.remote, we add the
 460                         * ref given in branch.<name>.merge, too.
 461                         *
 462                         * Note: has_merge implies non-NULL branch->remote_name
 463                         */
 464                        if (has_merge &&
 465                            !strcmp(branch->remote_name, remote->name))
 466                                add_merge_config(&ref_map, remote_refs, branch, &tail);
 467                } else {
 468                        ref_map = get_remote_ref(remote_refs, "HEAD");
 469                        if (!ref_map)
 470                                die(_("Couldn't find remote ref HEAD"));
 471                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 472                        tail = &ref_map->next;
 473                }
 474        }
 475
 476        if (tags == TAGS_SET)
 477                /* also fetch all tags */
 478                get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 479        else if (tags == TAGS_DEFAULT && *autotags)
 480                find_non_local_tags(remote_refs, &ref_map, &tail);
 481
 482        /* Now append any refs to be updated opportunistically: */
 483        *tail = orefs;
 484        for (rm = orefs; rm; rm = rm->next) {
 485                rm->fetch_head_status = FETCH_HEAD_IGNORE;
 486                tail = &rm->next;
 487        }
 488
 489        ref_map = ref_remove_duplicates(ref_map);
 490
 491        refname_hash_init(&existing_refs);
 492        for_each_ref(add_one_refname, &existing_refs);
 493
 494        for (rm = ref_map; rm; rm = rm->next) {
 495                if (rm->peer_ref) {
 496                        const char *refname = rm->peer_ref->name;
 497                        struct refname_hash_entry *peer_item;
 498
 499                        peer_item = hashmap_get_from_hash(&existing_refs,
 500                                                          strhash(refname),
 501                                                          refname);
 502                        if (peer_item) {
 503                                struct object_id *old_oid = &peer_item->oid;
 504                                oidcpy(&rm->peer_ref->old_oid, old_oid);
 505                        }
 506                }
 507        }
 508        hashmap_free(&existing_refs, 1);
 509
 510        return ref_map;
 511}
 512
 513#define STORE_REF_ERROR_OTHER 1
 514#define STORE_REF_ERROR_DF_CONFLICT 2
 515
 516static int s_update_ref(const char *action,
 517                        struct ref *ref,
 518                        int check_old)
 519{
 520        char *msg;
 521        char *rla = getenv("GIT_REFLOG_ACTION");
 522        struct ref_transaction *transaction;
 523        struct strbuf err = STRBUF_INIT;
 524        int ret, df_conflict = 0;
 525
 526        if (dry_run)
 527                return 0;
 528        if (!rla)
 529                rla = default_rla.buf;
 530        msg = xstrfmt("%s: %s", rla, action);
 531
 532        transaction = ref_transaction_begin(&err);
 533        if (!transaction ||
 534            ref_transaction_update(transaction, ref->name,
 535                                   &ref->new_oid,
 536                                   check_old ? &ref->old_oid : NULL,
 537                                   0, msg, &err))
 538                goto fail;
 539
 540        ret = ref_transaction_commit(transaction, &err);
 541        if (ret) {
 542                df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 543                goto fail;
 544        }
 545
 546        ref_transaction_free(transaction);
 547        strbuf_release(&err);
 548        free(msg);
 549        return 0;
 550fail:
 551        ref_transaction_free(transaction);
 552        error("%s", err.buf);
 553        strbuf_release(&err);
 554        free(msg);
 555        return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 556                           : STORE_REF_ERROR_OTHER;
 557}
 558
 559static int refcol_width = 10;
 560static int compact_format;
 561
 562static void adjust_refcol_width(const struct ref *ref)
 563{
 564        int max, rlen, llen, len;
 565
 566        /* uptodate lines are only shown on high verbosity level */
 567        if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
 568                return;
 569
 570        max    = term_columns();
 571        rlen   = utf8_strwidth(prettify_refname(ref->name));
 572
 573        llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 574
 575        /*
 576         * rough estimation to see if the output line is too long and
 577         * should not be counted (we can't do precise calculation
 578         * anyway because we don't know if the error explanation part
 579         * will be printed in update_local_ref)
 580         */
 581        if (compact_format) {
 582                llen = 0;
 583                max = max * 2 / 3;
 584        }
 585        len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 586        if (len >= max)
 587                return;
 588
 589        /*
 590         * Not precise calculation for compact mode because '*' can
 591         * appear on the left hand side of '->' and shrink the column
 592         * back.
 593         */
 594        if (refcol_width < rlen)
 595                refcol_width = rlen;
 596}
 597
 598static void prepare_format_display(struct ref *ref_map)
 599{
 600        struct ref *rm;
 601        const char *format = "full";
 602
 603        git_config_get_string_const("fetch.output", &format);
 604        if (!strcasecmp(format, "full"))
 605                compact_format = 0;
 606        else if (!strcasecmp(format, "compact"))
 607                compact_format = 1;
 608        else
 609                die(_("configuration fetch.output contains invalid value %s"),
 610                    format);
 611
 612        for (rm = ref_map; rm; rm = rm->next) {
 613                if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 614                    !rm->peer_ref ||
 615                    !strcmp(rm->name, "HEAD"))
 616                        continue;
 617
 618                adjust_refcol_width(rm);
 619        }
 620}
 621
 622static void print_remote_to_local(struct strbuf *display,
 623                                  const char *remote, const char *local)
 624{
 625        strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 626}
 627
 628static int find_and_replace(struct strbuf *haystack,
 629                            const char *needle,
 630                            const char *placeholder)
 631{
 632        const char *p = strstr(haystack->buf, needle);
 633        int plen, nlen;
 634
 635        if (!p)
 636                return 0;
 637
 638        if (p > haystack->buf && p[-1] != '/')
 639                return 0;
 640
 641        plen = strlen(p);
 642        nlen = strlen(needle);
 643        if (plen > nlen && p[nlen] != '/')
 644                return 0;
 645
 646        strbuf_splice(haystack, p - haystack->buf, nlen,
 647                      placeholder, strlen(placeholder));
 648        return 1;
 649}
 650
 651static void print_compact(struct strbuf *display,
 652                          const char *remote, const char *local)
 653{
 654        struct strbuf r = STRBUF_INIT;
 655        struct strbuf l = STRBUF_INIT;
 656
 657        if (!strcmp(remote, local)) {
 658                strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 659                return;
 660        }
 661
 662        strbuf_addstr(&r, remote);
 663        strbuf_addstr(&l, local);
 664
 665        if (!find_and_replace(&r, local, "*"))
 666                find_and_replace(&l, remote, "*");
 667        print_remote_to_local(display, r.buf, l.buf);
 668
 669        strbuf_release(&r);
 670        strbuf_release(&l);
 671}
 672
 673static void format_display(struct strbuf *display, char code,
 674                           const char *summary, const char *error,
 675                           const char *remote, const char *local,
 676                           int summary_width)
 677{
 678        int width = (summary_width + strlen(summary) - gettext_width(summary));
 679
 680        strbuf_addf(display, "%c %-*s ", code, width, summary);
 681        if (!compact_format)
 682                print_remote_to_local(display, remote, local);
 683        else
 684                print_compact(display, remote, local);
 685        if (error)
 686                strbuf_addf(display, "  (%s)", error);
 687}
 688
 689static int update_local_ref(struct ref *ref,
 690                            const char *remote,
 691                            const struct ref *remote_ref,
 692                            struct strbuf *display,
 693                            int summary_width)
 694{
 695        struct commit *current = NULL, *updated;
 696        enum object_type type;
 697        struct branch *current_branch = branch_get(NULL);
 698        const char *pretty_ref = prettify_refname(ref->name);
 699
 700        type = oid_object_info(the_repository, &ref->new_oid, NULL);
 701        if (type < 0)
 702                die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 703
 704        if (oideq(&ref->old_oid, &ref->new_oid)) {
 705                if (verbosity > 0)
 706                        format_display(display, '=', _("[up to date]"), NULL,
 707                                       remote, pretty_ref, summary_width);
 708                return 0;
 709        }
 710
 711        if (current_branch &&
 712            !strcmp(ref->name, current_branch->name) &&
 713            !(update_head_ok || is_bare_repository()) &&
 714            !is_null_oid(&ref->old_oid)) {
 715                /*
 716                 * If this is the head, and it's not okay to update
 717                 * the head, and the old value of the head isn't empty...
 718                 */
 719                format_display(display, '!', _("[rejected]"),
 720                               _("can't fetch in current branch"),
 721                               remote, pretty_ref, summary_width);
 722                return 1;
 723        }
 724
 725        if (!is_null_oid(&ref->old_oid) &&
 726            starts_with(ref->name, "refs/tags/")) {
 727                if (force || ref->force) {
 728                        int r;
 729                        r = s_update_ref("updating tag", ref, 0);
 730                        format_display(display, r ? '!' : 't', _("[tag update]"),
 731                                       r ? _("unable to update local ref") : NULL,
 732                                       remote, pretty_ref, summary_width);
 733                        return r;
 734                } else {
 735                        format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
 736                                       remote, pretty_ref, summary_width);
 737                        return 1;
 738                }
 739        }
 740
 741        current = lookup_commit_reference_gently(the_repository,
 742                                                 &ref->old_oid, 1);
 743        updated = lookup_commit_reference_gently(the_repository,
 744                                                 &ref->new_oid, 1);
 745        if (!current || !updated) {
 746                const char *msg;
 747                const char *what;
 748                int r;
 749                /*
 750                 * Nicely describe the new ref we're fetching.
 751                 * Base this on the remote's ref name, as it's
 752                 * more likely to follow a standard layout.
 753                 */
 754                const char *name = remote_ref ? remote_ref->name : "";
 755                if (starts_with(name, "refs/tags/")) {
 756                        msg = "storing tag";
 757                        what = _("[new tag]");
 758                } else if (starts_with(name, "refs/heads/")) {
 759                        msg = "storing head";
 760                        what = _("[new branch]");
 761                } else {
 762                        msg = "storing ref";
 763                        what = _("[new ref]");
 764                }
 765
 766                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 767                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 768                        check_for_new_submodule_commits(&ref->new_oid);
 769                r = s_update_ref(msg, ref, 0);
 770                format_display(display, r ? '!' : '*', what,
 771                               r ? _("unable to update local ref") : NULL,
 772                               remote, pretty_ref, summary_width);
 773                return r;
 774        }
 775
 776        if (in_merge_bases(current, updated)) {
 777                struct strbuf quickref = STRBUF_INIT;
 778                int r;
 779                strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
 780                strbuf_addstr(&quickref, "..");
 781                strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
 782                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 783                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 784                        check_for_new_submodule_commits(&ref->new_oid);
 785                r = s_update_ref("fast-forward", ref, 1);
 786                format_display(display, r ? '!' : ' ', quickref.buf,
 787                               r ? _("unable to update local ref") : NULL,
 788                               remote, pretty_ref, summary_width);
 789                strbuf_release(&quickref);
 790                return r;
 791        } else if (force || ref->force) {
 792                struct strbuf quickref = STRBUF_INIT;
 793                int r;
 794                strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
 795                strbuf_addstr(&quickref, "...");
 796                strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
 797                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 798                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 799                        check_for_new_submodule_commits(&ref->new_oid);
 800                r = s_update_ref("forced-update", ref, 1);
 801                format_display(display, r ? '!' : '+', quickref.buf,
 802                               r ? _("unable to update local ref") : _("forced update"),
 803                               remote, pretty_ref, summary_width);
 804                strbuf_release(&quickref);
 805                return r;
 806        } else {
 807                format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 808                               remote, pretty_ref, summary_width);
 809                return 1;
 810        }
 811}
 812
 813static int iterate_ref_map(void *cb_data, struct object_id *oid)
 814{
 815        struct ref **rm = cb_data;
 816        struct ref *ref = *rm;
 817
 818        while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 819                ref = ref->next;
 820        if (!ref)
 821                return -1; /* end of the list */
 822        *rm = ref->next;
 823        oidcpy(oid, &ref->old_oid);
 824        return 0;
 825}
 826
 827static int store_updated_refs(const char *raw_url, const char *remote_name,
 828                              int connectivity_checked, struct ref *ref_map)
 829{
 830        FILE *fp;
 831        struct commit *commit;
 832        int url_len, i, rc = 0;
 833        struct strbuf note = STRBUF_INIT;
 834        const char *what, *kind;
 835        struct ref *rm;
 836        char *url;
 837        const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
 838        int want_status;
 839        int summary_width = transport_summary_width(ref_map);
 840
 841        fp = fopen(filename, "a");
 842        if (!fp)
 843                return error_errno(_("cannot open %s"), filename);
 844
 845        if (raw_url)
 846                url = transport_anonymize_url(raw_url);
 847        else
 848                url = xstrdup("foreign");
 849
 850        if (!connectivity_checked) {
 851                rm = ref_map;
 852                if (check_connected(iterate_ref_map, &rm, NULL)) {
 853                        rc = error(_("%s did not send all necessary objects\n"), url);
 854                        goto abort;
 855                }
 856        }
 857
 858        prepare_format_display(ref_map);
 859
 860        /*
 861         * We do a pass for each fetch_head_status type in their enum order, so
 862         * merged entries are written before not-for-merge. That lets readers
 863         * use FETCH_HEAD as a refname to refer to the ref to be merged.
 864         */
 865        for (want_status = FETCH_HEAD_MERGE;
 866             want_status <= FETCH_HEAD_IGNORE;
 867             want_status++) {
 868                for (rm = ref_map; rm; rm = rm->next) {
 869                        struct ref *ref = NULL;
 870                        const char *merge_status_marker = "";
 871
 872                        if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 873                                if (want_status == FETCH_HEAD_MERGE)
 874                                        warning(_("reject %s because shallow roots are not allowed to be updated"),
 875                                                rm->peer_ref ? rm->peer_ref->name : rm->name);
 876                                continue;
 877                        }
 878
 879                        commit = lookup_commit_reference_gently(the_repository,
 880                                                                &rm->old_oid,
 881                                                                1);
 882                        if (!commit)
 883                                rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 884
 885                        if (rm->fetch_head_status != want_status)
 886                                continue;
 887
 888                        if (rm->peer_ref) {
 889                                ref = alloc_ref(rm->peer_ref->name);
 890                                oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 891                                oidcpy(&ref->new_oid, &rm->old_oid);
 892                                ref->force = rm->peer_ref->force;
 893                        }
 894
 895
 896                        if (!strcmp(rm->name, "HEAD")) {
 897                                kind = "";
 898                                what = "";
 899                        }
 900                        else if (starts_with(rm->name, "refs/heads/")) {
 901                                kind = "branch";
 902                                what = rm->name + 11;
 903                        }
 904                        else if (starts_with(rm->name, "refs/tags/")) {
 905                                kind = "tag";
 906                                what = rm->name + 10;
 907                        }
 908                        else if (starts_with(rm->name, "refs/remotes/")) {
 909                                kind = "remote-tracking branch";
 910                                what = rm->name + 13;
 911                        }
 912                        else {
 913                                kind = "";
 914                                what = rm->name;
 915                        }
 916
 917                        url_len = strlen(url);
 918                        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 919                                ;
 920                        url_len = i + 1;
 921                        if (4 < i && !strncmp(".git", url + i - 3, 4))
 922                                url_len = i - 3;
 923
 924                        strbuf_reset(&note);
 925                        if (*what) {
 926                                if (*kind)
 927                                        strbuf_addf(&note, "%s ", kind);
 928                                strbuf_addf(&note, "'%s' of ", what);
 929                        }
 930                        switch (rm->fetch_head_status) {
 931                        case FETCH_HEAD_NOT_FOR_MERGE:
 932                                merge_status_marker = "not-for-merge";
 933                                /* fall-through */
 934                        case FETCH_HEAD_MERGE:
 935                                fprintf(fp, "%s\t%s\t%s",
 936                                        oid_to_hex(&rm->old_oid),
 937                                        merge_status_marker,
 938                                        note.buf);
 939                                for (i = 0; i < url_len; ++i)
 940                                        if ('\n' == url[i])
 941                                                fputs("\\n", fp);
 942                                        else
 943                                                fputc(url[i], fp);
 944                                fputc('\n', fp);
 945                                break;
 946                        default:
 947                                /* do not write anything to FETCH_HEAD */
 948                                break;
 949                        }
 950
 951                        strbuf_reset(&note);
 952                        if (ref) {
 953                                rc |= update_local_ref(ref, what, rm, &note,
 954                                                       summary_width);
 955                                free(ref);
 956                        } else
 957                                format_display(&note, '*',
 958                                               *kind ? kind : "branch", NULL,
 959                                               *what ? what : "HEAD",
 960                                               "FETCH_HEAD", summary_width);
 961                        if (note.len) {
 962                                if (verbosity >= 0 && !shown_url) {
 963                                        fprintf(stderr, _("From %.*s\n"),
 964                                                        url_len, url);
 965                                        shown_url = 1;
 966                                }
 967                                if (verbosity >= 0)
 968                                        fprintf(stderr, " %s\n", note.buf);
 969                        }
 970                }
 971        }
 972
 973        if (rc & STORE_REF_ERROR_DF_CONFLICT)
 974                error(_("some local refs could not be updated; try running\n"
 975                      " 'git remote prune %s' to remove any old, conflicting "
 976                      "branches"), remote_name);
 977
 978 abort:
 979        strbuf_release(&note);
 980        free(url);
 981        fclose(fp);
 982        return rc;
 983}
 984
 985/*
 986 * We would want to bypass the object transfer altogether if
 987 * everything we are going to fetch already exists and is connected
 988 * locally.
 989 */
 990static int check_exist_and_connected(struct ref *ref_map)
 991{
 992        struct ref *rm = ref_map;
 993        struct check_connected_options opt = CHECK_CONNECTED_INIT;
 994        struct ref *r;
 995
 996        /*
 997         * If we are deepening a shallow clone we already have these
 998         * objects reachable.  Running rev-list here will return with
 999         * a good (0) exit status and we'll bypass the fetch that we
1000         * really need to perform.  Claiming failure now will ensure
1001         * we perform the network exchange to deepen our history.
1002         */
1003        if (deepen)
1004                return -1;
1005
1006        /*
1007         * check_connected() allows objects to merely be promised, but
1008         * we need all direct targets to exist.
1009         */
1010        for (r = rm; r; r = r->next) {
1011                if (!has_object_file(&r->old_oid))
1012                        return -1;
1013        }
1014
1015        opt.quiet = 1;
1016        return check_connected(iterate_ref_map, &rm, &opt);
1017}
1018
1019static int fetch_refs(struct transport *transport, struct ref *ref_map)
1020{
1021        int ret = check_exist_and_connected(ref_map);
1022        if (ret)
1023                ret = transport_fetch_refs(transport, ref_map);
1024        if (!ret)
1025                /*
1026                 * Keep the new pack's ".keep" file around to allow the caller
1027                 * time to update refs to reference the new objects.
1028                 */
1029                return 0;
1030        transport_unlock_pack(transport);
1031        return ret;
1032}
1033
1034/* Update local refs based on the ref values fetched from a remote */
1035static int consume_refs(struct transport *transport, struct ref *ref_map)
1036{
1037        int connectivity_checked = transport->smart_options
1038                ? transport->smart_options->connectivity_checked : 0;
1039        int ret = store_updated_refs(transport->url,
1040                                     transport->remote->name,
1041                                     connectivity_checked,
1042                                     ref_map);
1043        transport_unlock_pack(transport);
1044        return ret;
1045}
1046
1047static int prune_refs(struct refspec *rs, struct ref *ref_map,
1048                      const char *raw_url)
1049{
1050        int url_len, i, result = 0;
1051        struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1052        char *url;
1053        int summary_width = transport_summary_width(stale_refs);
1054        const char *dangling_msg = dry_run
1055                ? _("   (%s will become dangling)")
1056                : _("   (%s has become dangling)");
1057
1058        if (raw_url)
1059                url = transport_anonymize_url(raw_url);
1060        else
1061                url = xstrdup("foreign");
1062
1063        url_len = strlen(url);
1064        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1065                ;
1066
1067        url_len = i + 1;
1068        if (4 < i && !strncmp(".git", url + i - 3, 4))
1069                url_len = i - 3;
1070
1071        if (!dry_run) {
1072                struct string_list refnames = STRING_LIST_INIT_NODUP;
1073
1074                for (ref = stale_refs; ref; ref = ref->next)
1075                        string_list_append(&refnames, ref->name);
1076
1077                result = delete_refs("fetch: prune", &refnames, 0);
1078                string_list_clear(&refnames, 0);
1079        }
1080
1081        if (verbosity >= 0) {
1082                for (ref = stale_refs; ref; ref = ref->next) {
1083                        struct strbuf sb = STRBUF_INIT;
1084                        if (!shown_url) {
1085                                fprintf(stderr, _("From %.*s\n"), url_len, url);
1086                                shown_url = 1;
1087                        }
1088                        format_display(&sb, '-', _("[deleted]"), NULL,
1089                                       _("(none)"), prettify_refname(ref->name),
1090                                       summary_width);
1091                        fprintf(stderr, " %s\n",sb.buf);
1092                        strbuf_release(&sb);
1093                        warn_dangling_symref(stderr, dangling_msg, ref->name);
1094                }
1095        }
1096
1097        free(url);
1098        free_refs(stale_refs);
1099        return result;
1100}
1101
1102static void check_not_current_branch(struct ref *ref_map)
1103{
1104        struct branch *current_branch = branch_get(NULL);
1105
1106        if (is_bare_repository() || !current_branch)
1107                return;
1108
1109        for (; ref_map; ref_map = ref_map->next)
1110                if (ref_map->peer_ref && !strcmp(current_branch->refname,
1111                                        ref_map->peer_ref->name))
1112                        die(_("Refusing to fetch into current branch %s "
1113                            "of non-bare repository"), current_branch->refname);
1114}
1115
1116static int truncate_fetch_head(void)
1117{
1118        const char *filename = git_path_fetch_head(the_repository);
1119        FILE *fp = fopen_for_writing(filename);
1120
1121        if (!fp)
1122                return error_errno(_("cannot open %s"), filename);
1123        fclose(fp);
1124        return 0;
1125}
1126
1127static void set_option(struct transport *transport, const char *name, const char *value)
1128{
1129        int r = transport_set_option(transport, name, value);
1130        if (r < 0)
1131                die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1132                    name, value, transport->url);
1133        if (r > 0)
1134                warning(_("Option \"%s\" is ignored for %s\n"),
1135                        name, transport->url);
1136}
1137
1138
1139static int add_oid(const char *refname, const struct object_id *oid, int flags,
1140                   void *cb_data)
1141{
1142        struct oid_array *oids = cb_data;
1143
1144        oid_array_append(oids, oid);
1145        return 0;
1146}
1147
1148static void add_negotiation_tips(struct git_transport_options *smart_options)
1149{
1150        struct oid_array *oids = xcalloc(1, sizeof(*oids));
1151        int i;
1152
1153        for (i = 0; i < negotiation_tip.nr; i++) {
1154                const char *s = negotiation_tip.items[i].string;
1155                int old_nr;
1156                if (!has_glob_specials(s)) {
1157                        struct object_id oid;
1158                        if (get_oid(s, &oid))
1159                                die("%s is not a valid object", s);
1160                        oid_array_append(oids, &oid);
1161                        continue;
1162                }
1163                old_nr = oids->nr;
1164                for_each_glob_ref(add_oid, s, oids);
1165                if (old_nr == oids->nr)
1166                        warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1167                                s);
1168        }
1169        smart_options->negotiation_tips = oids;
1170}
1171
1172static struct transport *prepare_transport(struct remote *remote, int deepen)
1173{
1174        struct transport *transport;
1175        transport = transport_get(remote, NULL);
1176        transport_set_verbosity(transport, verbosity, progress);
1177        transport->family = family;
1178        if (upload_pack)
1179                set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1180        if (keep)
1181                set_option(transport, TRANS_OPT_KEEP, "yes");
1182        if (depth)
1183                set_option(transport, TRANS_OPT_DEPTH, depth);
1184        if (deepen && deepen_since)
1185                set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1186        if (deepen && deepen_not.nr)
1187                set_option(transport, TRANS_OPT_DEEPEN_NOT,
1188                           (const char *)&deepen_not);
1189        if (deepen_relative)
1190                set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1191        if (update_shallow)
1192                set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1193        if (filter_options.choice) {
1194                set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1195                           filter_options.filter_spec);
1196                set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1197        }
1198        if (negotiation_tip.nr) {
1199                if (transport->smart_options)
1200                        add_negotiation_tips(transport->smart_options);
1201                else
1202                        warning("Ignoring --negotiation-tip because the protocol does not support it.");
1203        }
1204        return transport;
1205}
1206
1207static void backfill_tags(struct transport *transport, struct ref *ref_map)
1208{
1209        int cannot_reuse;
1210
1211        /*
1212         * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1213         * when remote helper is used (setting it to an empty string
1214         * is not unsetting). We could extend the remote helper
1215         * protocol for that, but for now, just force a new connection
1216         * without deepen-since. Similar story for deepen-not.
1217         */
1218        cannot_reuse = transport->cannot_reuse ||
1219                deepen_since || deepen_not.nr;
1220        if (cannot_reuse) {
1221                gsecondary = prepare_transport(transport->remote, 0);
1222                transport = gsecondary;
1223        }
1224
1225        transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1226        transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1227        transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1228        if (!fetch_refs(transport, ref_map))
1229                consume_refs(transport, ref_map);
1230
1231        if (gsecondary) {
1232                transport_disconnect(gsecondary);
1233                gsecondary = NULL;
1234        }
1235}
1236
1237static int do_fetch(struct transport *transport,
1238                    struct refspec *rs)
1239{
1240        struct ref *ref_map;
1241        int autotags = (transport->remote->fetch_tags == 1);
1242        int retcode = 0;
1243        const struct ref *remote_refs;
1244        struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1245        int must_list_refs = 1;
1246
1247        if (tags == TAGS_DEFAULT) {
1248                if (transport->remote->fetch_tags == 2)
1249                        tags = TAGS_SET;
1250                if (transport->remote->fetch_tags == -1)
1251                        tags = TAGS_UNSET;
1252        }
1253
1254        /* if not appending, truncate FETCH_HEAD */
1255        if (!append && !dry_run) {
1256                retcode = truncate_fetch_head();
1257                if (retcode)
1258                        goto cleanup;
1259        }
1260
1261        if (rs->nr) {
1262                int i;
1263
1264                refspec_ref_prefixes(rs, &ref_prefixes);
1265
1266                /*
1267                 * We can avoid listing refs if all of them are exact
1268                 * OIDs
1269                 */
1270                must_list_refs = 0;
1271                for (i = 0; i < rs->nr; i++) {
1272                        if (!rs->items[i].exact_sha1) {
1273                                must_list_refs = 1;
1274                                break;
1275                        }
1276                }
1277        } else if (transport->remote && transport->remote->fetch.nr)
1278                refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1279
1280        if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1281                must_list_refs = 1;
1282                if (ref_prefixes.argc)
1283                        argv_array_push(&ref_prefixes, "refs/tags/");
1284        }
1285
1286        if (must_list_refs)
1287                remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1288        else
1289                remote_refs = NULL;
1290
1291        argv_array_clear(&ref_prefixes);
1292
1293        ref_map = get_ref_map(transport->remote, remote_refs, rs,
1294                              tags, &autotags);
1295        if (!update_head_ok)
1296                check_not_current_branch(ref_map);
1297
1298        if (tags == TAGS_DEFAULT && autotags)
1299                transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1300        if (prune) {
1301                /*
1302                 * We only prune based on refspecs specified
1303                 * explicitly (via command line or configuration); we
1304                 * don't care whether --tags was specified.
1305                 */
1306                if (rs->nr) {
1307                        prune_refs(rs, ref_map, transport->url);
1308                } else {
1309                        prune_refs(&transport->remote->fetch,
1310                                   ref_map,
1311                                   transport->url);
1312                }
1313        }
1314        if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1315                free_refs(ref_map);
1316                retcode = 1;
1317                goto cleanup;
1318        }
1319        free_refs(ref_map);
1320
1321        /* if neither --no-tags nor --tags was specified, do automated tag
1322         * following ... */
1323        if (tags == TAGS_DEFAULT && autotags) {
1324                struct ref **tail = &ref_map;
1325                ref_map = NULL;
1326                find_non_local_tags(remote_refs, &ref_map, &tail);
1327                if (ref_map)
1328                        backfill_tags(transport, ref_map);
1329                free_refs(ref_map);
1330        }
1331
1332 cleanup:
1333        return retcode;
1334}
1335
1336static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1337{
1338        struct string_list *list = priv;
1339        if (!remote->skip_default_update)
1340                string_list_append(list, remote->name);
1341        return 0;
1342}
1343
1344struct remote_group_data {
1345        const char *name;
1346        struct string_list *list;
1347};
1348
1349static int get_remote_group(const char *key, const char *value, void *priv)
1350{
1351        struct remote_group_data *g = priv;
1352
1353        if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1354                /* split list by white space */
1355                while (*value) {
1356                        size_t wordlen = strcspn(value, " \t\n");
1357
1358                        if (wordlen >= 1)
1359                                string_list_append_nodup(g->list,
1360                                                   xstrndup(value, wordlen));
1361                        value += wordlen + (value[wordlen] != '\0');
1362                }
1363        }
1364
1365        return 0;
1366}
1367
1368static int add_remote_or_group(const char *name, struct string_list *list)
1369{
1370        int prev_nr = list->nr;
1371        struct remote_group_data g;
1372        g.name = name; g.list = list;
1373
1374        git_config(get_remote_group, &g);
1375        if (list->nr == prev_nr) {
1376                struct remote *remote = remote_get(name);
1377                if (!remote_is_configured(remote, 0))
1378                        return 0;
1379                string_list_append(list, remote->name);
1380        }
1381        return 1;
1382}
1383
1384static void add_options_to_argv(struct argv_array *argv)
1385{
1386        if (dry_run)
1387                argv_array_push(argv, "--dry-run");
1388        if (prune != -1)
1389                argv_array_push(argv, prune ? "--prune" : "--no-prune");
1390        if (prune_tags != -1)
1391                argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1392        if (update_head_ok)
1393                argv_array_push(argv, "--update-head-ok");
1394        if (force)
1395                argv_array_push(argv, "--force");
1396        if (keep)
1397                argv_array_push(argv, "--keep");
1398        if (recurse_submodules == RECURSE_SUBMODULES_ON)
1399                argv_array_push(argv, "--recurse-submodules");
1400        else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1401                argv_array_push(argv, "--recurse-submodules=on-demand");
1402        if (tags == TAGS_SET)
1403                argv_array_push(argv, "--tags");
1404        else if (tags == TAGS_UNSET)
1405                argv_array_push(argv, "--no-tags");
1406        if (verbosity >= 2)
1407                argv_array_push(argv, "-v");
1408        if (verbosity >= 1)
1409                argv_array_push(argv, "-v");
1410        else if (verbosity < 0)
1411                argv_array_push(argv, "-q");
1412
1413}
1414
1415static int fetch_multiple(struct string_list *list)
1416{
1417        int i, result = 0;
1418        struct argv_array argv = ARGV_ARRAY_INIT;
1419
1420        if (!append && !dry_run) {
1421                int errcode = truncate_fetch_head();
1422                if (errcode)
1423                        return errcode;
1424        }
1425
1426        argv_array_pushl(&argv, "fetch", "--append", NULL);
1427        add_options_to_argv(&argv);
1428
1429        for (i = 0; i < list->nr; i++) {
1430                const char *name = list->items[i].string;
1431                argv_array_push(&argv, name);
1432                if (verbosity >= 0)
1433                        printf(_("Fetching %s\n"), name);
1434                if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1435                        error(_("Could not fetch %s"), name);
1436                        result = 1;
1437                }
1438                argv_array_pop(&argv);
1439        }
1440
1441        argv_array_clear(&argv);
1442        return result;
1443}
1444
1445/*
1446 * Fetching from the promisor remote should use the given filter-spec
1447 * or inherit the default filter-spec from the config.
1448 */
1449static inline void fetch_one_setup_partial(struct remote *remote)
1450{
1451        /*
1452         * Explicit --no-filter argument overrides everything, regardless
1453         * of any prior partial clones and fetches.
1454         */
1455        if (filter_options.no_filter)
1456                return;
1457
1458        /*
1459         * If no prior partial clone/fetch and the current fetch DID NOT
1460         * request a partial-fetch, do a normal fetch.
1461         */
1462        if (!repository_format_partial_clone && !filter_options.choice)
1463                return;
1464
1465        /*
1466         * If this is the FIRST partial-fetch request, we enable partial
1467         * on this repo and remember the given filter-spec as the default
1468         * for subsequent fetches to this remote.
1469         */
1470        if (!repository_format_partial_clone && filter_options.choice) {
1471                partial_clone_register(remote->name, &filter_options);
1472                return;
1473        }
1474
1475        /*
1476         * We are currently limited to only ONE promisor remote and only
1477         * allow partial-fetches from the promisor remote.
1478         */
1479        if (strcmp(remote->name, repository_format_partial_clone)) {
1480                if (filter_options.choice)
1481                        die(_("--filter can only be used with the remote configured in core.partialClone"));
1482                return;
1483        }
1484
1485        /*
1486         * Do a partial-fetch from the promisor remote using either the
1487         * explicitly given filter-spec or inherit the filter-spec from
1488         * the config.
1489         */
1490        if (!filter_options.choice)
1491                partial_clone_get_default_filter_spec(&filter_options);
1492        return;
1493}
1494
1495static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1496{
1497        struct refspec rs = REFSPEC_INIT_FETCH;
1498        int i;
1499        int exit_code;
1500        int maybe_prune_tags;
1501        int remote_via_config = remote_is_configured(remote, 0);
1502
1503        if (!remote)
1504                die(_("No remote repository specified.  Please, specify either a URL or a\n"
1505                    "remote name from which new revisions should be fetched."));
1506
1507        gtransport = prepare_transport(remote, 1);
1508
1509        if (prune < 0) {
1510                /* no command line request */
1511                if (0 <= remote->prune)
1512                        prune = remote->prune;
1513                else if (0 <= fetch_prune_config)
1514                        prune = fetch_prune_config;
1515                else
1516                        prune = PRUNE_BY_DEFAULT;
1517        }
1518
1519        if (prune_tags < 0) {
1520                /* no command line request */
1521                if (0 <= remote->prune_tags)
1522                        prune_tags = remote->prune_tags;
1523                else if (0 <= fetch_prune_tags_config)
1524                        prune_tags = fetch_prune_tags_config;
1525                else
1526                        prune_tags = PRUNE_TAGS_BY_DEFAULT;
1527        }
1528
1529        maybe_prune_tags = prune_tags_ok && prune_tags;
1530        if (maybe_prune_tags && remote_via_config)
1531                refspec_append(&remote->fetch, TAG_REFSPEC);
1532
1533        if (maybe_prune_tags && (argc || !remote_via_config))
1534                refspec_append(&rs, TAG_REFSPEC);
1535
1536        for (i = 0; i < argc; i++) {
1537                if (!strcmp(argv[i], "tag")) {
1538                        char *tag;
1539                        i++;
1540                        if (i >= argc)
1541                                die(_("You need to specify a tag name."));
1542
1543                        tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1544                                      argv[i], argv[i]);
1545                        refspec_append(&rs, tag);
1546                        free(tag);
1547                } else {
1548                        refspec_append(&rs, argv[i]);
1549                }
1550        }
1551
1552        if (server_options.nr)
1553                gtransport->server_options = &server_options;
1554
1555        sigchain_push_common(unlock_pack_on_signal);
1556        atexit(unlock_pack);
1557        exit_code = do_fetch(gtransport, &rs);
1558        refspec_clear(&rs);
1559        transport_disconnect(gtransport);
1560        gtransport = NULL;
1561        return exit_code;
1562}
1563
1564int cmd_fetch(int argc, const char **argv, const char *prefix)
1565{
1566        int i;
1567        struct string_list list = STRING_LIST_INIT_DUP;
1568        struct remote *remote = NULL;
1569        int result = 0;
1570        int prune_tags_ok = 1;
1571        struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1572
1573        packet_trace_identity("fetch");
1574
1575        fetch_if_missing = 0;
1576
1577        /* Record the command line for the reflog */
1578        strbuf_addstr(&default_rla, "fetch");
1579        for (i = 1; i < argc; i++)
1580                strbuf_addf(&default_rla, " %s", argv[i]);
1581
1582        fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1583        git_config(git_fetch_config, NULL);
1584
1585        argc = parse_options(argc, argv, prefix,
1586                             builtin_fetch_options, builtin_fetch_usage, 0);
1587
1588        if (deepen_relative) {
1589                if (deepen_relative < 0)
1590                        die(_("Negative depth in --deepen is not supported"));
1591                if (depth)
1592                        die(_("--deepen and --depth are mutually exclusive"));
1593                depth = xstrfmt("%d", deepen_relative);
1594        }
1595        if (unshallow) {
1596                if (depth)
1597                        die(_("--depth and --unshallow cannot be used together"));
1598                else if (!is_repository_shallow(the_repository))
1599                        die(_("--unshallow on a complete repository does not make sense"));
1600                else
1601                        depth = xstrfmt("%d", INFINITE_DEPTH);
1602        }
1603
1604        /* no need to be strict, transport_set_option() will validate it again */
1605        if (depth && atoi(depth) < 1)
1606                die(_("depth %s is not a positive number"), depth);
1607        if (depth || deepen_since || deepen_not.nr)
1608                deepen = 1;
1609
1610        if (filter_options.choice && !repository_format_partial_clone)
1611                die("--filter can only be used when extensions.partialClone is set");
1612
1613        if (all) {
1614                if (argc == 1)
1615                        die(_("fetch --all does not take a repository argument"));
1616                else if (argc > 1)
1617                        die(_("fetch --all does not make sense with refspecs"));
1618                (void) for_each_remote(get_one_remote_for_fetch, &list);
1619        } else if (argc == 0) {
1620                /* No arguments -- use default remote */
1621                remote = remote_get(NULL);
1622        } else if (multiple) {
1623                /* All arguments are assumed to be remotes or groups */
1624                for (i = 0; i < argc; i++)
1625                        if (!add_remote_or_group(argv[i], &list))
1626                                die(_("No such remote or remote group: %s"), argv[i]);
1627        } else {
1628                /* Single remote or group */
1629                (void) add_remote_or_group(argv[0], &list);
1630                if (list.nr > 1) {
1631                        /* More than one remote */
1632                        if (argc > 1)
1633                                die(_("Fetching a group and specifying refspecs does not make sense"));
1634                } else {
1635                        /* Zero or one remotes */
1636                        remote = remote_get(argv[0]);
1637                        prune_tags_ok = (argc == 1);
1638                        argc--;
1639                        argv++;
1640                }
1641        }
1642
1643        if (remote) {
1644                if (filter_options.choice || repository_format_partial_clone)
1645                        fetch_one_setup_partial(remote);
1646                result = fetch_one(remote, argc, argv, prune_tags_ok);
1647        } else {
1648                if (filter_options.choice)
1649                        die(_("--filter can only be used with the remote configured in core.partialClone"));
1650                /* TODO should this also die if we have a previous partial-clone? */
1651                result = fetch_multiple(&list);
1652        }
1653
1654        if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1655                struct argv_array options = ARGV_ARRAY_INIT;
1656
1657                add_options_to_argv(&options);
1658                result = fetch_populated_submodules(the_repository,
1659                                                    &options,
1660                                                    submodule_prefix,
1661                                                    recurse_submodules,
1662                                                    recurse_submodules_default,
1663                                                    verbosity < 0,
1664                                                    max_children);
1665                argv_array_clear(&options);
1666        }
1667
1668        string_list_clear(&list, 0);
1669
1670        close_all_packs(the_repository->objects);
1671
1672        argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1673        if (verbosity < 0)
1674                argv_array_push(&argv_gc_auto, "--quiet");
1675        run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1676        argv_array_clear(&argv_gc_auto);
1677
1678        return result;
1679}