7bbcd26faf1fe650ccc7dbbd526db5114aac0c8f
   1/*
   2 * "git fetch"
   3 */
   4#include "cache.h"
   5#include "config.h"
   6#include "repository.h"
   7#include "refs.h"
   8#include "commit.h"
   9#include "builtin.h"
  10#include "string-list.h"
  11#include "remote.h"
  12#include "transport.h"
  13#include "run-command.h"
  14#include "parse-options.h"
  15#include "sigchain.h"
  16#include "submodule-config.h"
  17#include "submodule.h"
  18#include "connected.h"
  19#include "argv-array.h"
  20#include "utf8.h"
  21#include "packfile.h"
  22
  23static const char * const builtin_fetch_usage[] = {
  24        N_("git fetch [<options>] [<repository> [<refspec>...]]"),
  25        N_("git fetch [<options>] <group>"),
  26        N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
  27        N_("git fetch --all [<options>]"),
  28        NULL
  29};
  30
  31enum {
  32        TAGS_UNSET = 0,
  33        TAGS_DEFAULT = 1,
  34        TAGS_SET = 2
  35};
  36
  37static int fetch_prune_config = -1; /* unspecified */
  38static int prune = -1; /* unspecified */
  39#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
  40
  41static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
  42static int progress = -1;
  43static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  44static int max_children = 1;
  45static enum transport_family family;
  46static const char *depth;
  47static const char *deepen_since;
  48static const char *upload_pack;
  49static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
  50static struct strbuf default_rla = STRBUF_INIT;
  51static struct transport *gtransport;
  52static struct transport *gsecondary;
  53static const char *submodule_prefix = "";
  54static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  55static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
  56static int shown_url = 0;
  57static int refmap_alloc, refmap_nr;
  58static const char **refmap_array;
  59
  60static int git_fetch_config(const char *k, const char *v, void *cb)
  61{
  62        if (!strcmp(k, "fetch.prune")) {
  63                fetch_prune_config = git_config_bool(k, v);
  64                return 0;
  65        }
  66
  67        if (!strcmp(k, "submodule.recurse")) {
  68                int r = git_config_bool(k, v) ?
  69                        RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
  70                recurse_submodules = r;
  71        }
  72
  73        if (!strcmp(k, "submodule.fetchjobs")) {
  74                max_children = parse_submodule_fetchjobs(k, v);
  75                return 0;
  76        } else if (!strcmp(k, "fetch.recursesubmodules")) {
  77                recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
  78                return 0;
  79        }
  80
  81        return git_default_config(k, v, cb);
  82}
  83
  84static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
  85{
  86        if (!strcmp(var, "submodule.fetchjobs")) {
  87                max_children = parse_submodule_fetchjobs(var, value);
  88                return 0;
  89        } else if (!strcmp(var, "fetch.recursesubmodules")) {
  90                recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
  91                return 0;
  92        }
  93
  94        return 0;
  95}
  96
  97static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
  98{
  99        ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
 100
 101        /*
 102         * "git fetch --refmap='' origin foo"
 103         * can be used to tell the command not to store anywhere
 104         */
 105        if (*arg)
 106                refmap_array[refmap_nr++] = arg;
 107        return 0;
 108}
 109
 110static struct option builtin_fetch_options[] = {
 111        OPT__VERBOSITY(&verbosity),
 112        OPT_BOOL(0, "all", &all,
 113                 N_("fetch from all remotes")),
 114        OPT_BOOL('a', "append", &append,
 115                 N_("append to .git/FETCH_HEAD instead of overwriting")),
 116        OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 117                   N_("path to upload pack on remote end")),
 118        OPT__FORCE(&force, N_("force overwrite of local branch")),
 119        OPT_BOOL('m', "multiple", &multiple,
 120                 N_("fetch from multiple remotes")),
 121        OPT_SET_INT('t', "tags", &tags,
 122                    N_("fetch all tags and associated objects"), TAGS_SET),
 123        OPT_SET_INT('n', NULL, &tags,
 124                    N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 125        OPT_INTEGER('j', "jobs", &max_children,
 126                    N_("number of submodules fetched in parallel")),
 127        OPT_BOOL('p', "prune", &prune,
 128                 N_("prune remote-tracking branches no longer on remote")),
 129        { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
 130                    N_("control recursive fetching of submodules"),
 131                    PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
 132        OPT_BOOL(0, "dry-run", &dry_run,
 133                 N_("dry run")),
 134        OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 135        OPT_BOOL('u', "update-head-ok", &update_head_ok,
 136                    N_("allow updating of HEAD ref")),
 137        OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 138        OPT_STRING(0, "depth", &depth, N_("depth"),
 139                   N_("deepen history of shallow clone")),
 140        OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
 141                   N_("deepen history of shallow repository based on time")),
 142        OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
 143                        N_("deepen history of shallow clone, excluding rev")),
 144        OPT_INTEGER(0, "deepen", &deepen_relative,
 145                    N_("deepen history of shallow clone")),
 146        { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
 147                   N_("convert to a complete repository"),
 148                   PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
 149        { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 150                   N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 151        { OPTION_CALLBACK, 0, "recurse-submodules-default",
 152                   &recurse_submodules_default, N_("on-demand"),
 153                   N_("default for recursive fetching of submodules "
 154                      "(lower priority than config files)"),
 155                   PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
 156        OPT_BOOL(0, "update-shallow", &update_shallow,
 157                 N_("accept refs that update .git/shallow")),
 158        { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
 159          N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
 160        OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 161                        TRANSPORT_FAMILY_IPV4),
 162        OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 163                        TRANSPORT_FAMILY_IPV6),
 164        OPT_END()
 165};
 166
 167static void unlock_pack(void)
 168{
 169        if (gtransport)
 170                transport_unlock_pack(gtransport);
 171        if (gsecondary)
 172                transport_unlock_pack(gsecondary);
 173}
 174
 175static void unlock_pack_on_signal(int signo)
 176{
 177        unlock_pack();
 178        sigchain_pop(signo);
 179        raise(signo);
 180}
 181
 182static void add_merge_config(struct ref **head,
 183                           const struct ref *remote_refs,
 184                           struct branch *branch,
 185                           struct ref ***tail)
 186{
 187        int i;
 188
 189        for (i = 0; i < branch->merge_nr; i++) {
 190                struct ref *rm, **old_tail = *tail;
 191                struct refspec refspec;
 192
 193                for (rm = *head; rm; rm = rm->next) {
 194                        if (branch_merge_matches(branch, i, rm->name)) {
 195                                rm->fetch_head_status = FETCH_HEAD_MERGE;
 196                                break;
 197                        }
 198                }
 199                if (rm)
 200                        continue;
 201
 202                /*
 203                 * Not fetched to a remote-tracking branch?  We need to fetch
 204                 * it anyway to allow this branch's "branch.$name.merge"
 205                 * to be honored by 'git pull', but we do not have to
 206                 * fail if branch.$name.merge is misconfigured to point
 207                 * at a nonexisting branch.  If we were indeed called by
 208                 * 'git pull', it will notice the misconfiguration because
 209                 * there is no entry in the resulting FETCH_HEAD marked
 210                 * for merging.
 211                 */
 212                memset(&refspec, 0, sizeof(refspec));
 213                refspec.src = branch->merge[i]->src;
 214                get_fetch_map(remote_refs, &refspec, tail, 1);
 215                for (rm = *old_tail; rm; rm = rm->next)
 216                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 217        }
 218}
 219
 220static int add_existing(const char *refname, const struct object_id *oid,
 221                        int flag, void *cbdata)
 222{
 223        struct string_list *list = (struct string_list *)cbdata;
 224        struct string_list_item *item = string_list_insert(list, refname);
 225        struct object_id *old_oid = xmalloc(sizeof(*old_oid));
 226
 227        oidcpy(old_oid, oid);
 228        item->util = old_oid;
 229        return 0;
 230}
 231
 232static int will_fetch(struct ref **head, const unsigned char *sha1)
 233{
 234        struct ref *rm = *head;
 235        while (rm) {
 236                if (!hashcmp(rm->old_oid.hash, sha1))
 237                        return 1;
 238                rm = rm->next;
 239        }
 240        return 0;
 241}
 242
 243static void find_non_local_tags(struct transport *transport,
 244                        struct ref **head,
 245                        struct ref ***tail)
 246{
 247        struct string_list existing_refs = STRING_LIST_INIT_DUP;
 248        struct string_list remote_refs = STRING_LIST_INIT_NODUP;
 249        const struct ref *ref;
 250        struct string_list_item *item = NULL;
 251
 252        for_each_ref(add_existing, &existing_refs);
 253        for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 254                if (!starts_with(ref->name, "refs/tags/"))
 255                        continue;
 256
 257                /*
 258                 * The peeled ref always follows the matching base
 259                 * ref, so if we see a peeled ref that we don't want
 260                 * to fetch then we can mark the ref entry in the list
 261                 * as one to ignore by setting util to NULL.
 262                 */
 263                if (ends_with(ref->name, "^{}")) {
 264                        if (item &&
 265                            !has_object_file_with_flags(&ref->old_oid,
 266                                                        OBJECT_INFO_QUICK) &&
 267                            !will_fetch(head, ref->old_oid.hash) &&
 268                            !has_sha1_file_with_flags(item->util,
 269                                                      OBJECT_INFO_QUICK) &&
 270                            !will_fetch(head, item->util))
 271                                item->util = NULL;
 272                        item = NULL;
 273                        continue;
 274                }
 275
 276                /*
 277                 * If item is non-NULL here, then we previously saw a
 278                 * ref not followed by a peeled reference, so we need
 279                 * to check if it is a lightweight tag that we want to
 280                 * fetch.
 281                 */
 282                if (item &&
 283                    !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 284                    !will_fetch(head, item->util))
 285                        item->util = NULL;
 286
 287                item = NULL;
 288
 289                /* skip duplicates and refs that we already have */
 290                if (string_list_has_string(&remote_refs, ref->name) ||
 291                    string_list_has_string(&existing_refs, ref->name))
 292                        continue;
 293
 294                item = string_list_insert(&remote_refs, ref->name);
 295                item->util = (void *)&ref->old_oid;
 296        }
 297        string_list_clear(&existing_refs, 1);
 298
 299        /*
 300         * We may have a final lightweight tag that needs to be
 301         * checked to see if it needs fetching.
 302         */
 303        if (item &&
 304            !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 305            !will_fetch(head, item->util))
 306                item->util = NULL;
 307
 308        /*
 309         * For all the tags in the remote_refs string list,
 310         * add them to the list of refs to be fetched
 311         */
 312        for_each_string_list_item(item, &remote_refs) {
 313                /* Unless we have already decided to ignore this item... */
 314                if (item->util)
 315                {
 316                        struct ref *rm = alloc_ref(item->string);
 317                        rm->peer_ref = alloc_ref(item->string);
 318                        oidcpy(&rm->old_oid, item->util);
 319                        **tail = rm;
 320                        *tail = &rm->next;
 321                }
 322        }
 323
 324        string_list_clear(&remote_refs, 0);
 325}
 326
 327static struct ref *get_ref_map(struct transport *transport,
 328                               struct refspec *refspecs, int refspec_count,
 329                               int tags, int *autotags)
 330{
 331        int i;
 332        struct ref *rm;
 333        struct ref *ref_map = NULL;
 334        struct ref **tail = &ref_map;
 335
 336        /* opportunistically-updated references: */
 337        struct ref *orefs = NULL, **oref_tail = &orefs;
 338
 339        const struct ref *remote_refs = transport_get_remote_refs(transport);
 340
 341        if (refspec_count) {
 342                struct refspec *fetch_refspec;
 343                int fetch_refspec_nr;
 344
 345                for (i = 0; i < refspec_count; i++) {
 346                        get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
 347                        if (refspecs[i].dst && refspecs[i].dst[0])
 348                                *autotags = 1;
 349                }
 350                /* Merge everything on the command line (but not --tags) */
 351                for (rm = ref_map; rm; rm = rm->next)
 352                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 353
 354                /*
 355                 * For any refs that we happen to be fetching via
 356                 * command-line arguments, the destination ref might
 357                 * have been missing or have been different than the
 358                 * remote-tracking ref that would be derived from the
 359                 * configured refspec.  In these cases, we want to
 360                 * take the opportunity to update their configured
 361                 * remote-tracking reference.  However, we do not want
 362                 * to mention these entries in FETCH_HEAD at all, as
 363                 * they would simply be duplicates of existing
 364                 * entries, so we set them FETCH_HEAD_IGNORE below.
 365                 *
 366                 * We compute these entries now, based only on the
 367                 * refspecs specified on the command line.  But we add
 368                 * them to the list following the refspecs resulting
 369                 * from the tags option so that one of the latter,
 370                 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 371                 * by ref_remove_duplicates() in favor of one of these
 372                 * opportunistic entries with FETCH_HEAD_IGNORE.
 373                 */
 374                if (refmap_array) {
 375                        fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
 376                        fetch_refspec_nr = refmap_nr;
 377                } else {
 378                        fetch_refspec = transport->remote->fetch;
 379                        fetch_refspec_nr = transport->remote->fetch_refspec_nr;
 380                }
 381
 382                for (i = 0; i < fetch_refspec_nr; i++)
 383                        get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
 384        } else if (refmap_array) {
 385                die("--refmap option is only meaningful with command-line refspec(s).");
 386        } else {
 387                /* Use the defaults */
 388                struct remote *remote = transport->remote;
 389                struct branch *branch = branch_get(NULL);
 390                int has_merge = branch_has_merge_config(branch);
 391                if (remote &&
 392                    (remote->fetch_refspec_nr ||
 393                     /* Note: has_merge implies non-NULL branch->remote_name */
 394                     (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 395                        for (i = 0; i < remote->fetch_refspec_nr; i++) {
 396                                get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 397                                if (remote->fetch[i].dst &&
 398                                    remote->fetch[i].dst[0])
 399                                        *autotags = 1;
 400                                if (!i && !has_merge && ref_map &&
 401                                    !remote->fetch[0].pattern)
 402                                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 403                        }
 404                        /*
 405                         * if the remote we're fetching from is the same
 406                         * as given in branch.<name>.remote, we add the
 407                         * ref given in branch.<name>.merge, too.
 408                         *
 409                         * Note: has_merge implies non-NULL branch->remote_name
 410                         */
 411                        if (has_merge &&
 412                            !strcmp(branch->remote_name, remote->name))
 413                                add_merge_config(&ref_map, remote_refs, branch, &tail);
 414                } else {
 415                        ref_map = get_remote_ref(remote_refs, "HEAD");
 416                        if (!ref_map)
 417                                die(_("Couldn't find remote ref HEAD"));
 418                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 419                        tail = &ref_map->next;
 420                }
 421        }
 422
 423        if (tags == TAGS_SET)
 424                /* also fetch all tags */
 425                get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 426        else if (tags == TAGS_DEFAULT && *autotags)
 427                find_non_local_tags(transport, &ref_map, &tail);
 428
 429        /* Now append any refs to be updated opportunistically: */
 430        *tail = orefs;
 431        for (rm = orefs; rm; rm = rm->next) {
 432                rm->fetch_head_status = FETCH_HEAD_IGNORE;
 433                tail = &rm->next;
 434        }
 435
 436        return ref_remove_duplicates(ref_map);
 437}
 438
 439#define STORE_REF_ERROR_OTHER 1
 440#define STORE_REF_ERROR_DF_CONFLICT 2
 441
 442static int s_update_ref(const char *action,
 443                        struct ref *ref,
 444                        int check_old)
 445{
 446        char *msg;
 447        char *rla = getenv("GIT_REFLOG_ACTION");
 448        struct ref_transaction *transaction;
 449        struct strbuf err = STRBUF_INIT;
 450        int ret, df_conflict = 0;
 451
 452        if (dry_run)
 453                return 0;
 454        if (!rla)
 455                rla = default_rla.buf;
 456        msg = xstrfmt("%s: %s", rla, action);
 457
 458        transaction = ref_transaction_begin(&err);
 459        if (!transaction ||
 460            ref_transaction_update(transaction, ref->name,
 461                                   &ref->new_oid,
 462                                   check_old ? &ref->old_oid : NULL,
 463                                   0, msg, &err))
 464                goto fail;
 465
 466        ret = ref_transaction_commit(transaction, &err);
 467        if (ret) {
 468                df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 469                goto fail;
 470        }
 471
 472        ref_transaction_free(transaction);
 473        strbuf_release(&err);
 474        free(msg);
 475        return 0;
 476fail:
 477        ref_transaction_free(transaction);
 478        error("%s", err.buf);
 479        strbuf_release(&err);
 480        free(msg);
 481        return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 482                           : STORE_REF_ERROR_OTHER;
 483}
 484
 485static int refcol_width = 10;
 486static int compact_format;
 487
 488static void adjust_refcol_width(const struct ref *ref)
 489{
 490        int max, rlen, llen, len;
 491
 492        /* uptodate lines are only shown on high verbosity level */
 493        if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 494                return;
 495
 496        max    = term_columns();
 497        rlen   = utf8_strwidth(prettify_refname(ref->name));
 498
 499        llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 500
 501        /*
 502         * rough estimation to see if the output line is too long and
 503         * should not be counted (we can't do precise calculation
 504         * anyway because we don't know if the error explanation part
 505         * will be printed in update_local_ref)
 506         */
 507        if (compact_format) {
 508                llen = 0;
 509                max = max * 2 / 3;
 510        }
 511        len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 512        if (len >= max)
 513                return;
 514
 515        /*
 516         * Not precise calculation for compact mode because '*' can
 517         * appear on the left hand side of '->' and shrink the column
 518         * back.
 519         */
 520        if (refcol_width < rlen)
 521                refcol_width = rlen;
 522}
 523
 524static void prepare_format_display(struct ref *ref_map)
 525{
 526        struct ref *rm;
 527        const char *format = "full";
 528
 529        git_config_get_string_const("fetch.output", &format);
 530        if (!strcasecmp(format, "full"))
 531                compact_format = 0;
 532        else if (!strcasecmp(format, "compact"))
 533                compact_format = 1;
 534        else
 535                die(_("configuration fetch.output contains invalid value %s"),
 536                    format);
 537
 538        for (rm = ref_map; rm; rm = rm->next) {
 539                if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 540                    !rm->peer_ref ||
 541                    !strcmp(rm->name, "HEAD"))
 542                        continue;
 543
 544                adjust_refcol_width(rm);
 545        }
 546}
 547
 548static void print_remote_to_local(struct strbuf *display,
 549                                  const char *remote, const char *local)
 550{
 551        strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 552}
 553
 554static int find_and_replace(struct strbuf *haystack,
 555                            const char *needle,
 556                            const char *placeholder)
 557{
 558        const char *p = strstr(haystack->buf, needle);
 559        int plen, nlen;
 560
 561        if (!p)
 562                return 0;
 563
 564        if (p > haystack->buf && p[-1] != '/')
 565                return 0;
 566
 567        plen = strlen(p);
 568        nlen = strlen(needle);
 569        if (plen > nlen && p[nlen] != '/')
 570                return 0;
 571
 572        strbuf_splice(haystack, p - haystack->buf, nlen,
 573                      placeholder, strlen(placeholder));
 574        return 1;
 575}
 576
 577static void print_compact(struct strbuf *display,
 578                          const char *remote, const char *local)
 579{
 580        struct strbuf r = STRBUF_INIT;
 581        struct strbuf l = STRBUF_INIT;
 582
 583        if (!strcmp(remote, local)) {
 584                strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 585                return;
 586        }
 587
 588        strbuf_addstr(&r, remote);
 589        strbuf_addstr(&l, local);
 590
 591        if (!find_and_replace(&r, local, "*"))
 592                find_and_replace(&l, remote, "*");
 593        print_remote_to_local(display, r.buf, l.buf);
 594
 595        strbuf_release(&r);
 596        strbuf_release(&l);
 597}
 598
 599static void format_display(struct strbuf *display, char code,
 600                           const char *summary, const char *error,
 601                           const char *remote, const char *local,
 602                           int summary_width)
 603{
 604        int width = (summary_width + strlen(summary) - gettext_width(summary));
 605
 606        strbuf_addf(display, "%c %-*s ", code, width, summary);
 607        if (!compact_format)
 608                print_remote_to_local(display, remote, local);
 609        else
 610                print_compact(display, remote, local);
 611        if (error)
 612                strbuf_addf(display, "  (%s)", error);
 613}
 614
 615static int update_local_ref(struct ref *ref,
 616                            const char *remote,
 617                            const struct ref *remote_ref,
 618                            struct strbuf *display,
 619                            int summary_width)
 620{
 621        struct commit *current = NULL, *updated;
 622        enum object_type type;
 623        struct branch *current_branch = branch_get(NULL);
 624        const char *pretty_ref = prettify_refname(ref->name);
 625
 626        type = sha1_object_info(ref->new_oid.hash, NULL);
 627        if (type < 0)
 628                die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 629
 630        if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 631                if (verbosity > 0)
 632                        format_display(display, '=', _("[up to date]"), NULL,
 633                                       remote, pretty_ref, summary_width);
 634                return 0;
 635        }
 636
 637        if (current_branch &&
 638            !strcmp(ref->name, current_branch->name) &&
 639            !(update_head_ok || is_bare_repository()) &&
 640            !is_null_oid(&ref->old_oid)) {
 641                /*
 642                 * If this is the head, and it's not okay to update
 643                 * the head, and the old value of the head isn't empty...
 644                 */
 645                format_display(display, '!', _("[rejected]"),
 646                               _("can't fetch in current branch"),
 647                               remote, pretty_ref, summary_width);
 648                return 1;
 649        }
 650
 651        if (!is_null_oid(&ref->old_oid) &&
 652            starts_with(ref->name, "refs/tags/")) {
 653                int r;
 654                r = s_update_ref("updating tag", ref, 0);
 655                format_display(display, r ? '!' : 't', _("[tag update]"),
 656                               r ? _("unable to update local ref") : NULL,
 657                               remote, pretty_ref, summary_width);
 658                return r;
 659        }
 660
 661        current = lookup_commit_reference_gently(&ref->old_oid, 1);
 662        updated = lookup_commit_reference_gently(&ref->new_oid, 1);
 663        if (!current || !updated) {
 664                const char *msg;
 665                const char *what;
 666                int r;
 667                /*
 668                 * Nicely describe the new ref we're fetching.
 669                 * Base this on the remote's ref name, as it's
 670                 * more likely to follow a standard layout.
 671                 */
 672                const char *name = remote_ref ? remote_ref->name : "";
 673                if (starts_with(name, "refs/tags/")) {
 674                        msg = "storing tag";
 675                        what = _("[new tag]");
 676                } else if (starts_with(name, "refs/heads/")) {
 677                        msg = "storing head";
 678                        what = _("[new branch]");
 679                } else {
 680                        msg = "storing ref";
 681                        what = _("[new ref]");
 682                }
 683
 684                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 685                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 686                        check_for_new_submodule_commits(&ref->new_oid);
 687                r = s_update_ref(msg, ref, 0);
 688                format_display(display, r ? '!' : '*', what,
 689                               r ? _("unable to update local ref") : NULL,
 690                               remote, pretty_ref, summary_width);
 691                return r;
 692        }
 693
 694        if (in_merge_bases(current, updated)) {
 695                struct strbuf quickref = STRBUF_INIT;
 696                int r;
 697                strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 698                strbuf_addstr(&quickref, "..");
 699                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 700                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 701                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 702                        check_for_new_submodule_commits(&ref->new_oid);
 703                r = s_update_ref("fast-forward", ref, 1);
 704                format_display(display, r ? '!' : ' ', quickref.buf,
 705                               r ? _("unable to update local ref") : NULL,
 706                               remote, pretty_ref, summary_width);
 707                strbuf_release(&quickref);
 708                return r;
 709        } else if (force || ref->force) {
 710                struct strbuf quickref = STRBUF_INIT;
 711                int r;
 712                strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 713                strbuf_addstr(&quickref, "...");
 714                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 715                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 716                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 717                        check_for_new_submodule_commits(&ref->new_oid);
 718                r = s_update_ref("forced-update", ref, 1);
 719                format_display(display, r ? '!' : '+', quickref.buf,
 720                               r ? _("unable to update local ref") : _("forced update"),
 721                               remote, pretty_ref, summary_width);
 722                strbuf_release(&quickref);
 723                return r;
 724        } else {
 725                format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 726                               remote, pretty_ref, summary_width);
 727                return 1;
 728        }
 729}
 730
 731static int iterate_ref_map(void *cb_data, struct object_id *oid)
 732{
 733        struct ref **rm = cb_data;
 734        struct ref *ref = *rm;
 735
 736        while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 737                ref = ref->next;
 738        if (!ref)
 739                return -1; /* end of the list */
 740        *rm = ref->next;
 741        oidcpy(oid, &ref->old_oid);
 742        return 0;
 743}
 744
 745static int store_updated_refs(const char *raw_url, const char *remote_name,
 746                struct ref *ref_map)
 747{
 748        FILE *fp;
 749        struct commit *commit;
 750        int url_len, i, rc = 0;
 751        struct strbuf note = STRBUF_INIT;
 752        const char *what, *kind;
 753        struct ref *rm;
 754        char *url;
 755        const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 756        int want_status;
 757        int summary_width = transport_summary_width(ref_map);
 758
 759        fp = fopen(filename, "a");
 760        if (!fp)
 761                return error_errno(_("cannot open %s"), filename);
 762
 763        if (raw_url)
 764                url = transport_anonymize_url(raw_url);
 765        else
 766                url = xstrdup("foreign");
 767
 768        rm = ref_map;
 769        if (check_connected(iterate_ref_map, &rm, NULL)) {
 770                rc = error(_("%s did not send all necessary objects\n"), url);
 771                goto abort;
 772        }
 773
 774        prepare_format_display(ref_map);
 775
 776        /*
 777         * We do a pass for each fetch_head_status type in their enum order, so
 778         * merged entries are written before not-for-merge. That lets readers
 779         * use FETCH_HEAD as a refname to refer to the ref to be merged.
 780         */
 781        for (want_status = FETCH_HEAD_MERGE;
 782             want_status <= FETCH_HEAD_IGNORE;
 783             want_status++) {
 784                for (rm = ref_map; rm; rm = rm->next) {
 785                        struct ref *ref = NULL;
 786                        const char *merge_status_marker = "";
 787
 788                        if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 789                                if (want_status == FETCH_HEAD_MERGE)
 790                                        warning(_("reject %s because shallow roots are not allowed to be updated"),
 791                                                rm->peer_ref ? rm->peer_ref->name : rm->name);
 792                                continue;
 793                        }
 794
 795                        commit = lookup_commit_reference_gently(&rm->old_oid,
 796                                                                1);
 797                        if (!commit)
 798                                rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 799
 800                        if (rm->fetch_head_status != want_status)
 801                                continue;
 802
 803                        if (rm->peer_ref) {
 804                                ref = alloc_ref(rm->peer_ref->name);
 805                                oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 806                                oidcpy(&ref->new_oid, &rm->old_oid);
 807                                ref->force = rm->peer_ref->force;
 808                        }
 809
 810
 811                        if (!strcmp(rm->name, "HEAD")) {
 812                                kind = "";
 813                                what = "";
 814                        }
 815                        else if (starts_with(rm->name, "refs/heads/")) {
 816                                kind = "branch";
 817                                what = rm->name + 11;
 818                        }
 819                        else if (starts_with(rm->name, "refs/tags/")) {
 820                                kind = "tag";
 821                                what = rm->name + 10;
 822                        }
 823                        else if (starts_with(rm->name, "refs/remotes/")) {
 824                                kind = "remote-tracking branch";
 825                                what = rm->name + 13;
 826                        }
 827                        else {
 828                                kind = "";
 829                                what = rm->name;
 830                        }
 831
 832                        url_len = strlen(url);
 833                        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 834                                ;
 835                        url_len = i + 1;
 836                        if (4 < i && !strncmp(".git", url + i - 3, 4))
 837                                url_len = i - 3;
 838
 839                        strbuf_reset(&note);
 840                        if (*what) {
 841                                if (*kind)
 842                                        strbuf_addf(&note, "%s ", kind);
 843                                strbuf_addf(&note, "'%s' of ", what);
 844                        }
 845                        switch (rm->fetch_head_status) {
 846                        case FETCH_HEAD_NOT_FOR_MERGE:
 847                                merge_status_marker = "not-for-merge";
 848                                /* fall-through */
 849                        case FETCH_HEAD_MERGE:
 850                                fprintf(fp, "%s\t%s\t%s",
 851                                        oid_to_hex(&rm->old_oid),
 852                                        merge_status_marker,
 853                                        note.buf);
 854                                for (i = 0; i < url_len; ++i)
 855                                        if ('\n' == url[i])
 856                                                fputs("\\n", fp);
 857                                        else
 858                                                fputc(url[i], fp);
 859                                fputc('\n', fp);
 860                                break;
 861                        default:
 862                                /* do not write anything to FETCH_HEAD */
 863                                break;
 864                        }
 865
 866                        strbuf_reset(&note);
 867                        if (ref) {
 868                                rc |= update_local_ref(ref, what, rm, &note,
 869                                                       summary_width);
 870                                free(ref);
 871                        } else
 872                                format_display(&note, '*',
 873                                               *kind ? kind : "branch", NULL,
 874                                               *what ? what : "HEAD",
 875                                               "FETCH_HEAD", summary_width);
 876                        if (note.len) {
 877                                if (verbosity >= 0 && !shown_url) {
 878                                        fprintf(stderr, _("From %.*s\n"),
 879                                                        url_len, url);
 880                                        shown_url = 1;
 881                                }
 882                                if (verbosity >= 0)
 883                                        fprintf(stderr, " %s\n", note.buf);
 884                        }
 885                }
 886        }
 887
 888        if (rc & STORE_REF_ERROR_DF_CONFLICT)
 889                error(_("some local refs could not be updated; try running\n"
 890                      " 'git remote prune %s' to remove any old, conflicting "
 891                      "branches"), remote_name);
 892
 893 abort:
 894        strbuf_release(&note);
 895        free(url);
 896        fclose(fp);
 897        return rc;
 898}
 899
 900/*
 901 * We would want to bypass the object transfer altogether if
 902 * everything we are going to fetch already exists and is connected
 903 * locally.
 904 */
 905static int quickfetch(struct ref *ref_map)
 906{
 907        struct ref *rm = ref_map;
 908        struct check_connected_options opt = CHECK_CONNECTED_INIT;
 909
 910        /*
 911         * If we are deepening a shallow clone we already have these
 912         * objects reachable.  Running rev-list here will return with
 913         * a good (0) exit status and we'll bypass the fetch that we
 914         * really need to perform.  Claiming failure now will ensure
 915         * we perform the network exchange to deepen our history.
 916         */
 917        if (deepen)
 918                return -1;
 919        opt.quiet = 1;
 920        return check_connected(iterate_ref_map, &rm, &opt);
 921}
 922
 923static int fetch_refs(struct transport *transport, struct ref *ref_map)
 924{
 925        int ret = quickfetch(ref_map);
 926        if (ret)
 927                ret = transport_fetch_refs(transport, ref_map);
 928        if (!ret)
 929                ret |= store_updated_refs(transport->url,
 930                                transport->remote->name,
 931                                ref_map);
 932        transport_unlock_pack(transport);
 933        return ret;
 934}
 935
 936static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 937                const char *raw_url)
 938{
 939        int url_len, i, result = 0;
 940        struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 941        char *url;
 942        int summary_width = transport_summary_width(stale_refs);
 943        const char *dangling_msg = dry_run
 944                ? _("   (%s will become dangling)")
 945                : _("   (%s has become dangling)");
 946
 947        if (raw_url)
 948                url = transport_anonymize_url(raw_url);
 949        else
 950                url = xstrdup("foreign");
 951
 952        url_len = strlen(url);
 953        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 954                ;
 955
 956        url_len = i + 1;
 957        if (4 < i && !strncmp(".git", url + i - 3, 4))
 958                url_len = i - 3;
 959
 960        if (!dry_run) {
 961                struct string_list refnames = STRING_LIST_INIT_NODUP;
 962
 963                for (ref = stale_refs; ref; ref = ref->next)
 964                        string_list_append(&refnames, ref->name);
 965
 966                result = delete_refs("fetch: prune", &refnames, 0);
 967                string_list_clear(&refnames, 0);
 968        }
 969
 970        if (verbosity >= 0) {
 971                for (ref = stale_refs; ref; ref = ref->next) {
 972                        struct strbuf sb = STRBUF_INIT;
 973                        if (!shown_url) {
 974                                fprintf(stderr, _("From %.*s\n"), url_len, url);
 975                                shown_url = 1;
 976                        }
 977                        format_display(&sb, '-', _("[deleted]"), NULL,
 978                                       _("(none)"), prettify_refname(ref->name),
 979                                       summary_width);
 980                        fprintf(stderr, " %s\n",sb.buf);
 981                        strbuf_release(&sb);
 982                        warn_dangling_symref(stderr, dangling_msg, ref->name);
 983                }
 984        }
 985
 986        free(url);
 987        free_refs(stale_refs);
 988        return result;
 989}
 990
 991static void check_not_current_branch(struct ref *ref_map)
 992{
 993        struct branch *current_branch = branch_get(NULL);
 994
 995        if (is_bare_repository() || !current_branch)
 996                return;
 997
 998        for (; ref_map; ref_map = ref_map->next)
 999                if (ref_map->peer_ref && !strcmp(current_branch->refname,
1000                                        ref_map->peer_ref->name))
1001                        die(_("Refusing to fetch into current branch %s "
1002                            "of non-bare repository"), current_branch->refname);
1003}
1004
1005static int truncate_fetch_head(void)
1006{
1007        const char *filename = git_path_fetch_head();
1008        FILE *fp = fopen_for_writing(filename);
1009
1010        if (!fp)
1011                return error_errno(_("cannot open %s"), filename);
1012        fclose(fp);
1013        return 0;
1014}
1015
1016static void set_option(struct transport *transport, const char *name, const char *value)
1017{
1018        int r = transport_set_option(transport, name, value);
1019        if (r < 0)
1020                die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1021                    name, value, transport->url);
1022        if (r > 0)
1023                warning(_("Option \"%s\" is ignored for %s\n"),
1024                        name, transport->url);
1025}
1026
1027static struct transport *prepare_transport(struct remote *remote, int deepen)
1028{
1029        struct transport *transport;
1030        transport = transport_get(remote, NULL);
1031        transport_set_verbosity(transport, verbosity, progress);
1032        transport->family = family;
1033        if (upload_pack)
1034                set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1035        if (keep)
1036                set_option(transport, TRANS_OPT_KEEP, "yes");
1037        if (depth)
1038                set_option(transport, TRANS_OPT_DEPTH, depth);
1039        if (deepen && deepen_since)
1040                set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1041        if (deepen && deepen_not.nr)
1042                set_option(transport, TRANS_OPT_DEEPEN_NOT,
1043                           (const char *)&deepen_not);
1044        if (deepen_relative)
1045                set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1046        if (update_shallow)
1047                set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1048        return transport;
1049}
1050
1051static void backfill_tags(struct transport *transport, struct ref *ref_map)
1052{
1053        int cannot_reuse;
1054
1055        /*
1056         * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1057         * when remote helper is used (setting it to an empty string
1058         * is not unsetting). We could extend the remote helper
1059         * protocol for that, but for now, just force a new connection
1060         * without deepen-since. Similar story for deepen-not.
1061         */
1062        cannot_reuse = transport->cannot_reuse ||
1063                deepen_since || deepen_not.nr;
1064        if (cannot_reuse) {
1065                gsecondary = prepare_transport(transport->remote, 0);
1066                transport = gsecondary;
1067        }
1068
1069        transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1070        transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1071        transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1072        fetch_refs(transport, ref_map);
1073
1074        if (gsecondary) {
1075                transport_disconnect(gsecondary);
1076                gsecondary = NULL;
1077        }
1078}
1079
1080static int do_fetch(struct transport *transport,
1081                    struct refspec *refs, int ref_count)
1082{
1083        struct string_list existing_refs = STRING_LIST_INIT_DUP;
1084        struct ref *ref_map;
1085        struct ref *rm;
1086        int autotags = (transport->remote->fetch_tags == 1);
1087        int retcode = 0;
1088
1089        for_each_ref(add_existing, &existing_refs);
1090
1091        if (tags == TAGS_DEFAULT) {
1092                if (transport->remote->fetch_tags == 2)
1093                        tags = TAGS_SET;
1094                if (transport->remote->fetch_tags == -1)
1095                        tags = TAGS_UNSET;
1096        }
1097
1098        /* if not appending, truncate FETCH_HEAD */
1099        if (!append && !dry_run) {
1100                retcode = truncate_fetch_head();
1101                if (retcode)
1102                        goto cleanup;
1103        }
1104
1105        ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1106        if (!update_head_ok)
1107                check_not_current_branch(ref_map);
1108
1109        for (rm = ref_map; rm; rm = rm->next) {
1110                if (rm->peer_ref) {
1111                        struct string_list_item *peer_item =
1112                                string_list_lookup(&existing_refs,
1113                                                   rm->peer_ref->name);
1114                        if (peer_item) {
1115                                struct object_id *old_oid = peer_item->util;
1116                                oidcpy(&rm->peer_ref->old_oid, old_oid);
1117                        }
1118                }
1119        }
1120
1121        if (tags == TAGS_DEFAULT && autotags)
1122                transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1123        if (prune) {
1124                /*
1125                 * We only prune based on refspecs specified
1126                 * explicitly (via command line or configuration); we
1127                 * don't care whether --tags was specified.
1128                 */
1129                if (ref_count) {
1130                        prune_refs(refs, ref_count, ref_map, transport->url);
1131                } else {
1132                        prune_refs(transport->remote->fetch,
1133                                   transport->remote->fetch_refspec_nr,
1134                                   ref_map,
1135                                   transport->url);
1136                }
1137        }
1138        if (fetch_refs(transport, ref_map)) {
1139                free_refs(ref_map);
1140                retcode = 1;
1141                goto cleanup;
1142        }
1143        free_refs(ref_map);
1144
1145        /* if neither --no-tags nor --tags was specified, do automated tag
1146         * following ... */
1147        if (tags == TAGS_DEFAULT && autotags) {
1148                struct ref **tail = &ref_map;
1149                ref_map = NULL;
1150                find_non_local_tags(transport, &ref_map, &tail);
1151                if (ref_map)
1152                        backfill_tags(transport, ref_map);
1153                free_refs(ref_map);
1154        }
1155
1156 cleanup:
1157        string_list_clear(&existing_refs, 1);
1158        return retcode;
1159}
1160
1161static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1162{
1163        struct string_list *list = priv;
1164        if (!remote->skip_default_update)
1165                string_list_append(list, remote->name);
1166        return 0;
1167}
1168
1169struct remote_group_data {
1170        const char *name;
1171        struct string_list *list;
1172};
1173
1174static int get_remote_group(const char *key, const char *value, void *priv)
1175{
1176        struct remote_group_data *g = priv;
1177
1178        if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1179                /* split list by white space */
1180                while (*value) {
1181                        size_t wordlen = strcspn(value, " \t\n");
1182
1183                        if (wordlen >= 1)
1184                                string_list_append_nodup(g->list,
1185                                                   xstrndup(value, wordlen));
1186                        value += wordlen + (value[wordlen] != '\0');
1187                }
1188        }
1189
1190        return 0;
1191}
1192
1193static int add_remote_or_group(const char *name, struct string_list *list)
1194{
1195        int prev_nr = list->nr;
1196        struct remote_group_data g;
1197        g.name = name; g.list = list;
1198
1199        git_config(get_remote_group, &g);
1200        if (list->nr == prev_nr) {
1201                struct remote *remote = remote_get(name);
1202                if (!remote_is_configured(remote, 0))
1203                        return 0;
1204                string_list_append(list, remote->name);
1205        }
1206        return 1;
1207}
1208
1209static void add_options_to_argv(struct argv_array *argv)
1210{
1211        if (dry_run)
1212                argv_array_push(argv, "--dry-run");
1213        if (prune != -1)
1214                argv_array_push(argv, prune ? "--prune" : "--no-prune");
1215        if (update_head_ok)
1216                argv_array_push(argv, "--update-head-ok");
1217        if (force)
1218                argv_array_push(argv, "--force");
1219        if (keep)
1220                argv_array_push(argv, "--keep");
1221        if (recurse_submodules == RECURSE_SUBMODULES_ON)
1222                argv_array_push(argv, "--recurse-submodules");
1223        else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1224                argv_array_push(argv, "--recurse-submodules=on-demand");
1225        if (tags == TAGS_SET)
1226                argv_array_push(argv, "--tags");
1227        else if (tags == TAGS_UNSET)
1228                argv_array_push(argv, "--no-tags");
1229        if (verbosity >= 2)
1230                argv_array_push(argv, "-v");
1231        if (verbosity >= 1)
1232                argv_array_push(argv, "-v");
1233        else if (verbosity < 0)
1234                argv_array_push(argv, "-q");
1235
1236}
1237
1238static int fetch_multiple(struct string_list *list)
1239{
1240        int i, result = 0;
1241        struct argv_array argv = ARGV_ARRAY_INIT;
1242
1243        if (!append && !dry_run) {
1244                int errcode = truncate_fetch_head();
1245                if (errcode)
1246                        return errcode;
1247        }
1248
1249        argv_array_pushl(&argv, "fetch", "--append", NULL);
1250        add_options_to_argv(&argv);
1251
1252        for (i = 0; i < list->nr; i++) {
1253                const char *name = list->items[i].string;
1254                argv_array_push(&argv, name);
1255                if (verbosity >= 0)
1256                        printf(_("Fetching %s\n"), name);
1257                if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1258                        error(_("Could not fetch %s"), name);
1259                        result = 1;
1260                }
1261                argv_array_pop(&argv);
1262        }
1263
1264        argv_array_clear(&argv);
1265        return result;
1266}
1267
1268static int fetch_one(struct remote *remote, int argc, const char **argv)
1269{
1270        static const char **refs = NULL;
1271        struct refspec *refspec;
1272        int ref_nr = 0;
1273        int exit_code;
1274
1275        if (!remote)
1276                die(_("No remote repository specified.  Please, specify either a URL or a\n"
1277                    "remote name from which new revisions should be fetched."));
1278
1279        gtransport = prepare_transport(remote, 1);
1280
1281        if (prune < 0) {
1282                /* no command line request */
1283                if (0 <= gtransport->remote->prune)
1284                        prune = gtransport->remote->prune;
1285                else if (0 <= fetch_prune_config)
1286                        prune = fetch_prune_config;
1287                else
1288                        prune = PRUNE_BY_DEFAULT;
1289        }
1290
1291        if (argc > 0) {
1292                int j = 0;
1293                int i;
1294                refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1295                for (i = 0; i < argc; i++) {
1296                        if (!strcmp(argv[i], "tag")) {
1297                                i++;
1298                                if (i >= argc)
1299                                        die(_("You need to specify a tag name."));
1300                                refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1301                                                    argv[i], argv[i]);
1302                        } else
1303                                refs[j++] = argv[i];
1304                }
1305                refs[j] = NULL;
1306                ref_nr = j;
1307        }
1308
1309        sigchain_push_common(unlock_pack_on_signal);
1310        atexit(unlock_pack);
1311        refspec = parse_fetch_refspec(ref_nr, refs);
1312        exit_code = do_fetch(gtransport, refspec, ref_nr);
1313        free_refspec(ref_nr, refspec);
1314        transport_disconnect(gtransport);
1315        gtransport = NULL;
1316        return exit_code;
1317}
1318
1319int cmd_fetch(int argc, const char **argv, const char *prefix)
1320{
1321        int i;
1322        struct string_list list = STRING_LIST_INIT_DUP;
1323        struct remote *remote;
1324        int result = 0;
1325        struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1326
1327        packet_trace_identity("fetch");
1328
1329        /* Record the command line for the reflog */
1330        strbuf_addstr(&default_rla, "fetch");
1331        for (i = 1; i < argc; i++)
1332                strbuf_addf(&default_rla, " %s", argv[i]);
1333
1334        config_from_gitmodules(gitmodules_fetch_config, NULL);
1335        git_config(git_fetch_config, NULL);
1336
1337        argc = parse_options(argc, argv, prefix,
1338                             builtin_fetch_options, builtin_fetch_usage, 0);
1339
1340        if (deepen_relative) {
1341                if (deepen_relative < 0)
1342                        die(_("Negative depth in --deepen is not supported"));
1343                if (depth)
1344                        die(_("--deepen and --depth are mutually exclusive"));
1345                depth = xstrfmt("%d", deepen_relative);
1346        }
1347        if (unshallow) {
1348                if (depth)
1349                        die(_("--depth and --unshallow cannot be used together"));
1350                else if (!is_repository_shallow())
1351                        die(_("--unshallow on a complete repository does not make sense"));
1352                else
1353                        depth = xstrfmt("%d", INFINITE_DEPTH);
1354        }
1355
1356        /* no need to be strict, transport_set_option() will validate it again */
1357        if (depth && atoi(depth) < 1)
1358                die(_("depth %s is not a positive number"), depth);
1359        if (depth || deepen_since || deepen_not.nr)
1360                deepen = 1;
1361
1362        if (all) {
1363                if (argc == 1)
1364                        die(_("fetch --all does not take a repository argument"));
1365                else if (argc > 1)
1366                        die(_("fetch --all does not make sense with refspecs"));
1367                (void) for_each_remote(get_one_remote_for_fetch, &list);
1368                result = fetch_multiple(&list);
1369        } else if (argc == 0) {
1370                /* No arguments -- use default remote */
1371                remote = remote_get(NULL);
1372                result = fetch_one(remote, argc, argv);
1373        } else if (multiple) {
1374                /* All arguments are assumed to be remotes or groups */
1375                for (i = 0; i < argc; i++)
1376                        if (!add_remote_or_group(argv[i], &list))
1377                                die(_("No such remote or remote group: %s"), argv[i]);
1378                result = fetch_multiple(&list);
1379        } else {
1380                /* Single remote or group */
1381                (void) add_remote_or_group(argv[0], &list);
1382                if (list.nr > 1) {
1383                        /* More than one remote */
1384                        if (argc > 1)
1385                                die(_("Fetching a group and specifying refspecs does not make sense"));
1386                        result = fetch_multiple(&list);
1387                } else {
1388                        /* Zero or one remotes */
1389                        remote = remote_get(argv[0]);
1390                        result = fetch_one(remote, argc-1, argv+1);
1391                }
1392        }
1393
1394        if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1395                struct argv_array options = ARGV_ARRAY_INIT;
1396
1397                add_options_to_argv(&options);
1398                result = fetch_populated_submodules(the_repository,
1399                                                    &options,
1400                                                    submodule_prefix,
1401                                                    recurse_submodules,
1402                                                    recurse_submodules_default,
1403                                                    verbosity < 0,
1404                                                    max_children);
1405                argv_array_clear(&options);
1406        }
1407
1408        string_list_clear(&list, 0);
1409
1410        close_all_packs();
1411
1412        argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1413        if (verbosity < 0)
1414                argv_array_push(&argv_gc_auto, "--quiet");
1415        run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1416        argv_array_clear(&argv_gc_auto);
1417
1418        return result;
1419}