14aab71c2ce0695aaad16ff4f59641d2e11265ef
   1/*
   2 * "git fetch"
   3 */
   4#include "cache.h"
   5#include "config.h"
   6#include "refs.h"
   7#include "commit.h"
   8#include "builtin.h"
   9#include "string-list.h"
  10#include "remote.h"
  11#include "transport.h"
  12#include "run-command.h"
  13#include "parse-options.h"
  14#include "sigchain.h"
  15#include "submodule-config.h"
  16#include "submodule.h"
  17#include "connected.h"
  18#include "argv-array.h"
  19#include "utf8.h"
  20#include "packfile.h"
  21#include "list-objects-filter-options.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;
  59static struct list_objects_filter_options filter_options;
  60
  61static int git_fetch_config(const char *k, const char *v, void *cb)
  62{
  63        if (!strcmp(k, "fetch.prune")) {
  64                fetch_prune_config = git_config_bool(k, v);
  65                return 0;
  66        }
  67
  68        if (!strcmp(k, "submodule.recurse")) {
  69                int r = git_config_bool(k, v) ?
  70                        RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
  71                recurse_submodules = r;
  72        }
  73
  74        if (!strcmp(k, "submodule.fetchjobs")) {
  75                max_children = parse_submodule_fetchjobs(k, v);
  76                return 0;
  77        } else if (!strcmp(k, "fetch.recursesubmodules")) {
  78                recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
  79                return 0;
  80        }
  81
  82        return git_default_config(k, v, cb);
  83}
  84
  85static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
  86{
  87        if (!strcmp(var, "submodule.fetchjobs")) {
  88                max_children = parse_submodule_fetchjobs(var, value);
  89                return 0;
  90        } else if (!strcmp(var, "fetch.recursesubmodules")) {
  91                recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
  92                return 0;
  93        }
  94
  95        return 0;
  96}
  97
  98static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
  99{
 100        ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
 101
 102        /*
 103         * "git fetch --refmap='' origin foo"
 104         * can be used to tell the command not to store anywhere
 105         */
 106        if (*arg)
 107                refmap_array[refmap_nr++] = arg;
 108        return 0;
 109}
 110
 111static struct option builtin_fetch_options[] = {
 112        OPT__VERBOSITY(&verbosity),
 113        OPT_BOOL(0, "all", &all,
 114                 N_("fetch from all remotes")),
 115        OPT_BOOL('a', "append", &append,
 116                 N_("append to .git/FETCH_HEAD instead of overwriting")),
 117        OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 118                   N_("path to upload pack on remote end")),
 119        OPT__FORCE(&force, N_("force overwrite of local branch")),
 120        OPT_BOOL('m', "multiple", &multiple,
 121                 N_("fetch from multiple remotes")),
 122        OPT_SET_INT('t', "tags", &tags,
 123                    N_("fetch all tags and associated objects"), TAGS_SET),
 124        OPT_SET_INT('n', NULL, &tags,
 125                    N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 126        OPT_INTEGER('j', "jobs", &max_children,
 127                    N_("number of submodules fetched in parallel")),
 128        OPT_BOOL('p', "prune", &prune,
 129                 N_("prune remote-tracking branches no longer on remote")),
 130        { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
 131                    N_("control recursive fetching of submodules"),
 132                    PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
 133        OPT_BOOL(0, "dry-run", &dry_run,
 134                 N_("dry run")),
 135        OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
 136        OPT_BOOL('u', "update-head-ok", &update_head_ok,
 137                    N_("allow updating of HEAD ref")),
 138        OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 139        OPT_STRING(0, "depth", &depth, N_("depth"),
 140                   N_("deepen history of shallow clone")),
 141        OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
 142                   N_("deepen history of shallow repository based on time")),
 143        OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
 144                        N_("deepen history of shallow clone, excluding rev")),
 145        OPT_INTEGER(0, "deepen", &deepen_relative,
 146                    N_("deepen history of shallow clone")),
 147        { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
 148                   N_("convert to a complete repository"),
 149                   PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
 150        { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
 151                   N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
 152        { OPTION_CALLBACK, 0, "recurse-submodules-default",
 153                   &recurse_submodules_default, N_("on-demand"),
 154                   N_("default for recursive fetching of submodules "
 155                      "(lower priority than config files)"),
 156                   PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
 157        OPT_BOOL(0, "update-shallow", &update_shallow,
 158                 N_("accept refs that update .git/shallow")),
 159        { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
 160          N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
 161        OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 162                        TRANSPORT_FAMILY_IPV4),
 163        OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 164                        TRANSPORT_FAMILY_IPV6),
 165        OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 166        OPT_END()
 167};
 168
 169static void unlock_pack(void)
 170{
 171        if (gtransport)
 172                transport_unlock_pack(gtransport);
 173        if (gsecondary)
 174                transport_unlock_pack(gsecondary);
 175}
 176
 177static void unlock_pack_on_signal(int signo)
 178{
 179        unlock_pack();
 180        sigchain_pop(signo);
 181        raise(signo);
 182}
 183
 184static void add_merge_config(struct ref **head,
 185                           const struct ref *remote_refs,
 186                           struct branch *branch,
 187                           struct ref ***tail)
 188{
 189        int i;
 190
 191        for (i = 0; i < branch->merge_nr; i++) {
 192                struct ref *rm, **old_tail = *tail;
 193                struct refspec refspec;
 194
 195                for (rm = *head; rm; rm = rm->next) {
 196                        if (branch_merge_matches(branch, i, rm->name)) {
 197                                rm->fetch_head_status = FETCH_HEAD_MERGE;
 198                                break;
 199                        }
 200                }
 201                if (rm)
 202                        continue;
 203
 204                /*
 205                 * Not fetched to a remote-tracking branch?  We need to fetch
 206                 * it anyway to allow this branch's "branch.$name.merge"
 207                 * to be honored by 'git pull', but we do not have to
 208                 * fail if branch.$name.merge is misconfigured to point
 209                 * at a nonexisting branch.  If we were indeed called by
 210                 * 'git pull', it will notice the misconfiguration because
 211                 * there is no entry in the resulting FETCH_HEAD marked
 212                 * for merging.
 213                 */
 214                memset(&refspec, 0, sizeof(refspec));
 215                refspec.src = branch->merge[i]->src;
 216                get_fetch_map(remote_refs, &refspec, tail, 1);
 217                for (rm = *old_tail; rm; rm = rm->next)
 218                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 219        }
 220}
 221
 222static int add_existing(const char *refname, const struct object_id *oid,
 223                        int flag, void *cbdata)
 224{
 225        struct string_list *list = (struct string_list *)cbdata;
 226        struct string_list_item *item = string_list_insert(list, refname);
 227        struct object_id *old_oid = xmalloc(sizeof(*old_oid));
 228
 229        oidcpy(old_oid, oid);
 230        item->util = old_oid;
 231        return 0;
 232}
 233
 234static int will_fetch(struct ref **head, const unsigned char *sha1)
 235{
 236        struct ref *rm = *head;
 237        while (rm) {
 238                if (!hashcmp(rm->old_oid.hash, sha1))
 239                        return 1;
 240                rm = rm->next;
 241        }
 242        return 0;
 243}
 244
 245static void find_non_local_tags(struct transport *transport,
 246                        struct ref **head,
 247                        struct ref ***tail)
 248{
 249        struct string_list existing_refs = STRING_LIST_INIT_DUP;
 250        struct string_list remote_refs = STRING_LIST_INIT_NODUP;
 251        const struct ref *ref;
 252        struct string_list_item *item = NULL;
 253
 254        for_each_ref(add_existing, &existing_refs);
 255        for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 256                if (!starts_with(ref->name, "refs/tags/"))
 257                        continue;
 258
 259                /*
 260                 * The peeled ref always follows the matching base
 261                 * ref, so if we see a peeled ref that we don't want
 262                 * to fetch then we can mark the ref entry in the list
 263                 * as one to ignore by setting util to NULL.
 264                 */
 265                if (ends_with(ref->name, "^{}")) {
 266                        if (item &&
 267                            !has_object_file_with_flags(&ref->old_oid,
 268                                                        OBJECT_INFO_QUICK) &&
 269                            !will_fetch(head, ref->old_oid.hash) &&
 270                            !has_sha1_file_with_flags(item->util,
 271                                                      OBJECT_INFO_QUICK) &&
 272                            !will_fetch(head, item->util))
 273                                item->util = NULL;
 274                        item = NULL;
 275                        continue;
 276                }
 277
 278                /*
 279                 * If item is non-NULL here, then we previously saw a
 280                 * ref not followed by a peeled reference, so we need
 281                 * to check if it is a lightweight tag that we want to
 282                 * fetch.
 283                 */
 284                if (item &&
 285                    !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 286                    !will_fetch(head, item->util))
 287                        item->util = NULL;
 288
 289                item = NULL;
 290
 291                /* skip duplicates and refs that we already have */
 292                if (string_list_has_string(&remote_refs, ref->name) ||
 293                    string_list_has_string(&existing_refs, ref->name))
 294                        continue;
 295
 296                item = string_list_insert(&remote_refs, ref->name);
 297                item->util = (void *)&ref->old_oid;
 298        }
 299        string_list_clear(&existing_refs, 1);
 300
 301        /*
 302         * We may have a final lightweight tag that needs to be
 303         * checked to see if it needs fetching.
 304         */
 305        if (item &&
 306            !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 307            !will_fetch(head, item->util))
 308                item->util = NULL;
 309
 310        /*
 311         * For all the tags in the remote_refs string list,
 312         * add them to the list of refs to be fetched
 313         */
 314        for_each_string_list_item(item, &remote_refs) {
 315                /* Unless we have already decided to ignore this item... */
 316                if (item->util)
 317                {
 318                        struct ref *rm = alloc_ref(item->string);
 319                        rm->peer_ref = alloc_ref(item->string);
 320                        oidcpy(&rm->old_oid, item->util);
 321                        **tail = rm;
 322                        *tail = &rm->next;
 323                }
 324        }
 325
 326        string_list_clear(&remote_refs, 0);
 327}
 328
 329static struct ref *get_ref_map(struct transport *transport,
 330                               struct refspec *refspecs, int refspec_count,
 331                               int tags, int *autotags)
 332{
 333        int i;
 334        struct ref *rm;
 335        struct ref *ref_map = NULL;
 336        struct ref **tail = &ref_map;
 337
 338        /* opportunistically-updated references: */
 339        struct ref *orefs = NULL, **oref_tail = &orefs;
 340
 341        const struct ref *remote_refs = transport_get_remote_refs(transport);
 342
 343        if (refspec_count) {
 344                struct refspec *fetch_refspec;
 345                int fetch_refspec_nr;
 346
 347                for (i = 0; i < refspec_count; i++) {
 348                        get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
 349                        if (refspecs[i].dst && refspecs[i].dst[0])
 350                                *autotags = 1;
 351                }
 352                /* Merge everything on the command line (but not --tags) */
 353                for (rm = ref_map; rm; rm = rm->next)
 354                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 355
 356                /*
 357                 * For any refs that we happen to be fetching via
 358                 * command-line arguments, the destination ref might
 359                 * have been missing or have been different than the
 360                 * remote-tracking ref that would be derived from the
 361                 * configured refspec.  In these cases, we want to
 362                 * take the opportunity to update their configured
 363                 * remote-tracking reference.  However, we do not want
 364                 * to mention these entries in FETCH_HEAD at all, as
 365                 * they would simply be duplicates of existing
 366                 * entries, so we set them FETCH_HEAD_IGNORE below.
 367                 *
 368                 * We compute these entries now, based only on the
 369                 * refspecs specified on the command line.  But we add
 370                 * them to the list following the refspecs resulting
 371                 * from the tags option so that one of the latter,
 372                 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 373                 * by ref_remove_duplicates() in favor of one of these
 374                 * opportunistic entries with FETCH_HEAD_IGNORE.
 375                 */
 376                if (refmap_array) {
 377                        fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
 378                        fetch_refspec_nr = refmap_nr;
 379                } else {
 380                        fetch_refspec = transport->remote->fetch;
 381                        fetch_refspec_nr = transport->remote->fetch_refspec_nr;
 382                }
 383
 384                for (i = 0; i < fetch_refspec_nr; i++)
 385                        get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
 386        } else if (refmap_array) {
 387                die("--refmap option is only meaningful with command-line refspec(s).");
 388        } else {
 389                /* Use the defaults */
 390                struct remote *remote = transport->remote;
 391                struct branch *branch = branch_get(NULL);
 392                int has_merge = branch_has_merge_config(branch);
 393                if (remote &&
 394                    (remote->fetch_refspec_nr ||
 395                     /* Note: has_merge implies non-NULL branch->remote_name */
 396                     (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 397                        for (i = 0; i < remote->fetch_refspec_nr; i++) {
 398                                get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 399                                if (remote->fetch[i].dst &&
 400                                    remote->fetch[i].dst[0])
 401                                        *autotags = 1;
 402                                if (!i && !has_merge && ref_map &&
 403                                    !remote->fetch[0].pattern)
 404                                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 405                        }
 406                        /*
 407                         * if the remote we're fetching from is the same
 408                         * as given in branch.<name>.remote, we add the
 409                         * ref given in branch.<name>.merge, too.
 410                         *
 411                         * Note: has_merge implies non-NULL branch->remote_name
 412                         */
 413                        if (has_merge &&
 414                            !strcmp(branch->remote_name, remote->name))
 415                                add_merge_config(&ref_map, remote_refs, branch, &tail);
 416                } else {
 417                        ref_map = get_remote_ref(remote_refs, "HEAD");
 418                        if (!ref_map)
 419                                die(_("Couldn't find remote ref HEAD"));
 420                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 421                        tail = &ref_map->next;
 422                }
 423        }
 424
 425        if (tags == TAGS_SET)
 426                /* also fetch all tags */
 427                get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 428        else if (tags == TAGS_DEFAULT && *autotags)
 429                find_non_local_tags(transport, &ref_map, &tail);
 430
 431        /* Now append any refs to be updated opportunistically: */
 432        *tail = orefs;
 433        for (rm = orefs; rm; rm = rm->next) {
 434                rm->fetch_head_status = FETCH_HEAD_IGNORE;
 435                tail = &rm->next;
 436        }
 437
 438        return ref_remove_duplicates(ref_map);
 439}
 440
 441#define STORE_REF_ERROR_OTHER 1
 442#define STORE_REF_ERROR_DF_CONFLICT 2
 443
 444static int s_update_ref(const char *action,
 445                        struct ref *ref,
 446                        int check_old)
 447{
 448        char *msg;
 449        char *rla = getenv("GIT_REFLOG_ACTION");
 450        struct ref_transaction *transaction;
 451        struct strbuf err = STRBUF_INIT;
 452        int ret, df_conflict = 0;
 453
 454        if (dry_run)
 455                return 0;
 456        if (!rla)
 457                rla = default_rla.buf;
 458        msg = xstrfmt("%s: %s", rla, action);
 459
 460        transaction = ref_transaction_begin(&err);
 461        if (!transaction ||
 462            ref_transaction_update(transaction, ref->name,
 463                                   ref->new_oid.hash,
 464                                   check_old ? ref->old_oid.hash : NULL,
 465                                   0, msg, &err))
 466                goto fail;
 467
 468        ret = ref_transaction_commit(transaction, &err);
 469        if (ret) {
 470                df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 471                goto fail;
 472        }
 473
 474        ref_transaction_free(transaction);
 475        strbuf_release(&err);
 476        free(msg);
 477        return 0;
 478fail:
 479        ref_transaction_free(transaction);
 480        error("%s", err.buf);
 481        strbuf_release(&err);
 482        free(msg);
 483        return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 484                           : STORE_REF_ERROR_OTHER;
 485}
 486
 487static int refcol_width = 10;
 488static int compact_format;
 489
 490static void adjust_refcol_width(const struct ref *ref)
 491{
 492        int max, rlen, llen, len;
 493
 494        /* uptodate lines are only shown on high verbosity level */
 495        if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
 496                return;
 497
 498        max    = term_columns();
 499        rlen   = utf8_strwidth(prettify_refname(ref->name));
 500
 501        llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 502
 503        /*
 504         * rough estimation to see if the output line is too long and
 505         * should not be counted (we can't do precise calculation
 506         * anyway because we don't know if the error explanation part
 507         * will be printed in update_local_ref)
 508         */
 509        if (compact_format) {
 510                llen = 0;
 511                max = max * 2 / 3;
 512        }
 513        len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 514        if (len >= max)
 515                return;
 516
 517        /*
 518         * Not precise calculation for compact mode because '*' can
 519         * appear on the left hand side of '->' and shrink the column
 520         * back.
 521         */
 522        if (refcol_width < rlen)
 523                refcol_width = rlen;
 524}
 525
 526static void prepare_format_display(struct ref *ref_map)
 527{
 528        struct ref *rm;
 529        const char *format = "full";
 530
 531        git_config_get_string_const("fetch.output", &format);
 532        if (!strcasecmp(format, "full"))
 533                compact_format = 0;
 534        else if (!strcasecmp(format, "compact"))
 535                compact_format = 1;
 536        else
 537                die(_("configuration fetch.output contains invalid value %s"),
 538                    format);
 539
 540        for (rm = ref_map; rm; rm = rm->next) {
 541                if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 542                    !rm->peer_ref ||
 543                    !strcmp(rm->name, "HEAD"))
 544                        continue;
 545
 546                adjust_refcol_width(rm);
 547        }
 548}
 549
 550static void print_remote_to_local(struct strbuf *display,
 551                                  const char *remote, const char *local)
 552{
 553        strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 554}
 555
 556static int find_and_replace(struct strbuf *haystack,
 557                            const char *needle,
 558                            const char *placeholder)
 559{
 560        const char *p = strstr(haystack->buf, needle);
 561        int plen, nlen;
 562
 563        if (!p)
 564                return 0;
 565
 566        if (p > haystack->buf && p[-1] != '/')
 567                return 0;
 568
 569        plen = strlen(p);
 570        nlen = strlen(needle);
 571        if (plen > nlen && p[nlen] != '/')
 572                return 0;
 573
 574        strbuf_splice(haystack, p - haystack->buf, nlen,
 575                      placeholder, strlen(placeholder));
 576        return 1;
 577}
 578
 579static void print_compact(struct strbuf *display,
 580                          const char *remote, const char *local)
 581{
 582        struct strbuf r = STRBUF_INIT;
 583        struct strbuf l = STRBUF_INIT;
 584
 585        if (!strcmp(remote, local)) {
 586                strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 587                return;
 588        }
 589
 590        strbuf_addstr(&r, remote);
 591        strbuf_addstr(&l, local);
 592
 593        if (!find_and_replace(&r, local, "*"))
 594                find_and_replace(&l, remote, "*");
 595        print_remote_to_local(display, r.buf, l.buf);
 596
 597        strbuf_release(&r);
 598        strbuf_release(&l);
 599}
 600
 601static void format_display(struct strbuf *display, char code,
 602                           const char *summary, const char *error,
 603                           const char *remote, const char *local,
 604                           int summary_width)
 605{
 606        int width = (summary_width + strlen(summary) - gettext_width(summary));
 607
 608        strbuf_addf(display, "%c %-*s ", code, width, summary);
 609        if (!compact_format)
 610                print_remote_to_local(display, remote, local);
 611        else
 612                print_compact(display, remote, local);
 613        if (error)
 614                strbuf_addf(display, "  (%s)", error);
 615}
 616
 617static int update_local_ref(struct ref *ref,
 618                            const char *remote,
 619                            const struct ref *remote_ref,
 620                            struct strbuf *display,
 621                            int summary_width)
 622{
 623        struct commit *current = NULL, *updated;
 624        enum object_type type;
 625        struct branch *current_branch = branch_get(NULL);
 626        const char *pretty_ref = prettify_refname(ref->name);
 627
 628        type = sha1_object_info(ref->new_oid.hash, NULL);
 629        if (type < 0)
 630                die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 631
 632        if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
 633                if (verbosity > 0)
 634                        format_display(display, '=', _("[up to date]"), NULL,
 635                                       remote, pretty_ref, summary_width);
 636                return 0;
 637        }
 638
 639        if (current_branch &&
 640            !strcmp(ref->name, current_branch->name) &&
 641            !(update_head_ok || is_bare_repository()) &&
 642            !is_null_oid(&ref->old_oid)) {
 643                /*
 644                 * If this is the head, and it's not okay to update
 645                 * the head, and the old value of the head isn't empty...
 646                 */
 647                format_display(display, '!', _("[rejected]"),
 648                               _("can't fetch in current branch"),
 649                               remote, pretty_ref, summary_width);
 650                return 1;
 651        }
 652
 653        if (!is_null_oid(&ref->old_oid) &&
 654            starts_with(ref->name, "refs/tags/")) {
 655                int r;
 656                r = s_update_ref("updating tag", ref, 0);
 657                format_display(display, r ? '!' : 't', _("[tag update]"),
 658                               r ? _("unable to update local ref") : NULL,
 659                               remote, pretty_ref, summary_width);
 660                return r;
 661        }
 662
 663        current = lookup_commit_reference_gently(&ref->old_oid, 1);
 664        updated = lookup_commit_reference_gently(&ref->new_oid, 1);
 665        if (!current || !updated) {
 666                const char *msg;
 667                const char *what;
 668                int r;
 669                /*
 670                 * Nicely describe the new ref we're fetching.
 671                 * Base this on the remote's ref name, as it's
 672                 * more likely to follow a standard layout.
 673                 */
 674                const char *name = remote_ref ? remote_ref->name : "";
 675                if (starts_with(name, "refs/tags/")) {
 676                        msg = "storing tag";
 677                        what = _("[new tag]");
 678                } else if (starts_with(name, "refs/heads/")) {
 679                        msg = "storing head";
 680                        what = _("[new branch]");
 681                } else {
 682                        msg = "storing ref";
 683                        what = _("[new ref]");
 684                }
 685
 686                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 687                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 688                        check_for_new_submodule_commits(&ref->new_oid);
 689                r = s_update_ref(msg, ref, 0);
 690                format_display(display, r ? '!' : '*', what,
 691                               r ? _("unable to update local ref") : NULL,
 692                               remote, pretty_ref, summary_width);
 693                return r;
 694        }
 695
 696        if (in_merge_bases(current, updated)) {
 697                struct strbuf quickref = STRBUF_INIT;
 698                int r;
 699                strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 700                strbuf_addstr(&quickref, "..");
 701                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 702                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 703                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 704                        check_for_new_submodule_commits(&ref->new_oid);
 705                r = s_update_ref("fast-forward", ref, 1);
 706                format_display(display, r ? '!' : ' ', quickref.buf,
 707                               r ? _("unable to update local ref") : NULL,
 708                               remote, pretty_ref, summary_width);
 709                strbuf_release(&quickref);
 710                return r;
 711        } else if (force || ref->force) {
 712                struct strbuf quickref = STRBUF_INIT;
 713                int r;
 714                strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
 715                strbuf_addstr(&quickref, "...");
 716                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
 717                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 718                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 719                        check_for_new_submodule_commits(&ref->new_oid);
 720                r = s_update_ref("forced-update", ref, 1);
 721                format_display(display, r ? '!' : '+', quickref.buf,
 722                               r ? _("unable to update local ref") : _("forced update"),
 723                               remote, pretty_ref, summary_width);
 724                strbuf_release(&quickref);
 725                return r;
 726        } else {
 727                format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 728                               remote, pretty_ref, summary_width);
 729                return 1;
 730        }
 731}
 732
 733static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
 734{
 735        struct ref **rm = cb_data;
 736        struct ref *ref = *rm;
 737
 738        while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 739                ref = ref->next;
 740        if (!ref)
 741                return -1; /* end of the list */
 742        *rm = ref->next;
 743        hashcpy(sha1, ref->old_oid.hash);
 744        return 0;
 745}
 746
 747static int store_updated_refs(const char *raw_url, const char *remote_name,
 748                struct ref *ref_map)
 749{
 750        FILE *fp;
 751        struct commit *commit;
 752        int url_len, i, rc = 0;
 753        struct strbuf note = STRBUF_INIT;
 754        const char *what, *kind;
 755        struct ref *rm;
 756        char *url;
 757        const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
 758        int want_status;
 759        int summary_width = transport_summary_width(ref_map);
 760
 761        fp = fopen(filename, "a");
 762        if (!fp)
 763                return error_errno(_("cannot open %s"), filename);
 764
 765        if (raw_url)
 766                url = transport_anonymize_url(raw_url);
 767        else
 768                url = xstrdup("foreign");
 769
 770        rm = ref_map;
 771        if (check_connected(iterate_ref_map, &rm, NULL)) {
 772                rc = error(_("%s did not send all necessary objects\n"), url);
 773                goto abort;
 774        }
 775
 776        prepare_format_display(ref_map);
 777
 778        /*
 779         * We do a pass for each fetch_head_status type in their enum order, so
 780         * merged entries are written before not-for-merge. That lets readers
 781         * use FETCH_HEAD as a refname to refer to the ref to be merged.
 782         */
 783        for (want_status = FETCH_HEAD_MERGE;
 784             want_status <= FETCH_HEAD_IGNORE;
 785             want_status++) {
 786                for (rm = ref_map; rm; rm = rm->next) {
 787                        struct ref *ref = NULL;
 788                        const char *merge_status_marker = "";
 789
 790                        if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 791                                if (want_status == FETCH_HEAD_MERGE)
 792                                        warning(_("reject %s because shallow roots are not allowed to be updated"),
 793                                                rm->peer_ref ? rm->peer_ref->name : rm->name);
 794                                continue;
 795                        }
 796
 797                        commit = lookup_commit_reference_gently(&rm->old_oid,
 798                                                                1);
 799                        if (!commit)
 800                                rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 801
 802                        if (rm->fetch_head_status != want_status)
 803                                continue;
 804
 805                        if (rm->peer_ref) {
 806                                ref = alloc_ref(rm->peer_ref->name);
 807                                oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 808                                oidcpy(&ref->new_oid, &rm->old_oid);
 809                                ref->force = rm->peer_ref->force;
 810                        }
 811
 812
 813                        if (!strcmp(rm->name, "HEAD")) {
 814                                kind = "";
 815                                what = "";
 816                        }
 817                        else if (starts_with(rm->name, "refs/heads/")) {
 818                                kind = "branch";
 819                                what = rm->name + 11;
 820                        }
 821                        else if (starts_with(rm->name, "refs/tags/")) {
 822                                kind = "tag";
 823                                what = rm->name + 10;
 824                        }
 825                        else if (starts_with(rm->name, "refs/remotes/")) {
 826                                kind = "remote-tracking branch";
 827                                what = rm->name + 13;
 828                        }
 829                        else {
 830                                kind = "";
 831                                what = rm->name;
 832                        }
 833
 834                        url_len = strlen(url);
 835                        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 836                                ;
 837                        url_len = i + 1;
 838                        if (4 < i && !strncmp(".git", url + i - 3, 4))
 839                                url_len = i - 3;
 840
 841                        strbuf_reset(&note);
 842                        if (*what) {
 843                                if (*kind)
 844                                        strbuf_addf(&note, "%s ", kind);
 845                                strbuf_addf(&note, "'%s' of ", what);
 846                        }
 847                        switch (rm->fetch_head_status) {
 848                        case FETCH_HEAD_NOT_FOR_MERGE:
 849                                merge_status_marker = "not-for-merge";
 850                                /* fall-through */
 851                        case FETCH_HEAD_MERGE:
 852                                fprintf(fp, "%s\t%s\t%s",
 853                                        oid_to_hex(&rm->old_oid),
 854                                        merge_status_marker,
 855                                        note.buf);
 856                                for (i = 0; i < url_len; ++i)
 857                                        if ('\n' == url[i])
 858                                                fputs("\\n", fp);
 859                                        else
 860                                                fputc(url[i], fp);
 861                                fputc('\n', fp);
 862                                break;
 863                        default:
 864                                /* do not write anything to FETCH_HEAD */
 865                                break;
 866                        }
 867
 868                        strbuf_reset(&note);
 869                        if (ref) {
 870                                rc |= update_local_ref(ref, what, rm, &note,
 871                                                       summary_width);
 872                                free(ref);
 873                        } else
 874                                format_display(&note, '*',
 875                                               *kind ? kind : "branch", NULL,
 876                                               *what ? what : "HEAD",
 877                                               "FETCH_HEAD", summary_width);
 878                        if (note.len) {
 879                                if (verbosity >= 0 && !shown_url) {
 880                                        fprintf(stderr, _("From %.*s\n"),
 881                                                        url_len, url);
 882                                        shown_url = 1;
 883                                }
 884                                if (verbosity >= 0)
 885                                        fprintf(stderr, " %s\n", note.buf);
 886                        }
 887                }
 888        }
 889
 890        if (rc & STORE_REF_ERROR_DF_CONFLICT)
 891                error(_("some local refs could not be updated; try running\n"
 892                      " 'git remote prune %s' to remove any old, conflicting "
 893                      "branches"), remote_name);
 894
 895 abort:
 896        strbuf_release(&note);
 897        free(url);
 898        fclose(fp);
 899        return rc;
 900}
 901
 902/*
 903 * We would want to bypass the object transfer altogether if
 904 * everything we are going to fetch already exists and is connected
 905 * locally.
 906 */
 907static int quickfetch(struct ref *ref_map)
 908{
 909        struct ref *rm = ref_map;
 910        struct check_connected_options opt = CHECK_CONNECTED_INIT;
 911
 912        /*
 913         * If we are deepening a shallow clone we already have these
 914         * objects reachable.  Running rev-list here will return with
 915         * a good (0) exit status and we'll bypass the fetch that we
 916         * really need to perform.  Claiming failure now will ensure
 917         * we perform the network exchange to deepen our history.
 918         */
 919        if (deepen)
 920                return -1;
 921        opt.quiet = 1;
 922        return check_connected(iterate_ref_map, &rm, &opt);
 923}
 924
 925static int fetch_refs(struct transport *transport, struct ref *ref_map)
 926{
 927        int ret = quickfetch(ref_map);
 928        if (ret)
 929                ret = transport_fetch_refs(transport, ref_map);
 930        if (!ret)
 931                ret |= store_updated_refs(transport->url,
 932                                transport->remote->name,
 933                                ref_map);
 934        transport_unlock_pack(transport);
 935        return ret;
 936}
 937
 938static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
 939                const char *raw_url)
 940{
 941        int url_len, i, result = 0;
 942        struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
 943        char *url;
 944        int summary_width = transport_summary_width(stale_refs);
 945        const char *dangling_msg = dry_run
 946                ? _("   (%s will become dangling)")
 947                : _("   (%s has become dangling)");
 948
 949        if (raw_url)
 950                url = transport_anonymize_url(raw_url);
 951        else
 952                url = xstrdup("foreign");
 953
 954        url_len = strlen(url);
 955        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 956                ;
 957
 958        url_len = i + 1;
 959        if (4 < i && !strncmp(".git", url + i - 3, 4))
 960                url_len = i - 3;
 961
 962        if (!dry_run) {
 963                struct string_list refnames = STRING_LIST_INIT_NODUP;
 964
 965                for (ref = stale_refs; ref; ref = ref->next)
 966                        string_list_append(&refnames, ref->name);
 967
 968                result = delete_refs("fetch: prune", &refnames, 0);
 969                string_list_clear(&refnames, 0);
 970        }
 971
 972        if (verbosity >= 0) {
 973                for (ref = stale_refs; ref; ref = ref->next) {
 974                        struct strbuf sb = STRBUF_INIT;
 975                        if (!shown_url) {
 976                                fprintf(stderr, _("From %.*s\n"), url_len, url);
 977                                shown_url = 1;
 978                        }
 979                        format_display(&sb, '-', _("[deleted]"), NULL,
 980                                       _("(none)"), prettify_refname(ref->name),
 981                                       summary_width);
 982                        fprintf(stderr, " %s\n",sb.buf);
 983                        strbuf_release(&sb);
 984                        warn_dangling_symref(stderr, dangling_msg, ref->name);
 985                }
 986        }
 987
 988        free(url);
 989        free_refs(stale_refs);
 990        return result;
 991}
 992
 993static void check_not_current_branch(struct ref *ref_map)
 994{
 995        struct branch *current_branch = branch_get(NULL);
 996
 997        if (is_bare_repository() || !current_branch)
 998                return;
 999
1000        for (; ref_map; ref_map = ref_map->next)
1001                if (ref_map->peer_ref && !strcmp(current_branch->refname,
1002                                        ref_map->peer_ref->name))
1003                        die(_("Refusing to fetch into current branch %s "
1004                            "of non-bare repository"), current_branch->refname);
1005}
1006
1007static int truncate_fetch_head(void)
1008{
1009        const char *filename = git_path_fetch_head();
1010        FILE *fp = fopen_for_writing(filename);
1011
1012        if (!fp)
1013                return error_errno(_("cannot open %s"), filename);
1014        fclose(fp);
1015        return 0;
1016}
1017
1018static void set_option(struct transport *transport, const char *name, const char *value)
1019{
1020        int r = transport_set_option(transport, name, value);
1021        if (r < 0)
1022                die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1023                    name, value, transport->url);
1024        if (r > 0)
1025                warning(_("Option \"%s\" is ignored for %s\n"),
1026                        name, transport->url);
1027}
1028
1029static struct transport *prepare_transport(struct remote *remote, int deepen)
1030{
1031        struct transport *transport;
1032        transport = transport_get(remote, NULL);
1033        transport_set_verbosity(transport, verbosity, progress);
1034        transport->family = family;
1035        if (upload_pack)
1036                set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1037        if (keep)
1038                set_option(transport, TRANS_OPT_KEEP, "yes");
1039        if (depth)
1040                set_option(transport, TRANS_OPT_DEPTH, depth);
1041        if (deepen && deepen_since)
1042                set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1043        if (deepen && deepen_not.nr)
1044                set_option(transport, TRANS_OPT_DEEPEN_NOT,
1045                           (const char *)&deepen_not);
1046        if (deepen_relative)
1047                set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1048        if (update_shallow)
1049                set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1050        if (filter_options.choice) {
1051                set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1052                           filter_options.filter_spec);
1053                set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1054        }
1055        return transport;
1056}
1057
1058static void backfill_tags(struct transport *transport, struct ref *ref_map)
1059{
1060        int cannot_reuse;
1061
1062        /*
1063         * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1064         * when remote helper is used (setting it to an empty string
1065         * is not unsetting). We could extend the remote helper
1066         * protocol for that, but for now, just force a new connection
1067         * without deepen-since. Similar story for deepen-not.
1068         */
1069        cannot_reuse = transport->cannot_reuse ||
1070                deepen_since || deepen_not.nr;
1071        if (cannot_reuse) {
1072                gsecondary = prepare_transport(transport->remote, 0);
1073                transport = gsecondary;
1074        }
1075
1076        transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1077        transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1078        transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1079        fetch_refs(transport, ref_map);
1080
1081        if (gsecondary) {
1082                transport_disconnect(gsecondary);
1083                gsecondary = NULL;
1084        }
1085}
1086
1087static int do_fetch(struct transport *transport,
1088                    struct refspec *refs, int ref_count)
1089{
1090        struct string_list existing_refs = STRING_LIST_INIT_DUP;
1091        struct ref *ref_map;
1092        struct ref *rm;
1093        int autotags = (transport->remote->fetch_tags == 1);
1094        int retcode = 0;
1095
1096        for_each_ref(add_existing, &existing_refs);
1097
1098        if (tags == TAGS_DEFAULT) {
1099                if (transport->remote->fetch_tags == 2)
1100                        tags = TAGS_SET;
1101                if (transport->remote->fetch_tags == -1)
1102                        tags = TAGS_UNSET;
1103        }
1104
1105        if (!transport->get_refs_list || !transport->fetch)
1106                die(_("Don't know how to fetch from %s"), transport->url);
1107
1108        /* if not appending, truncate FETCH_HEAD */
1109        if (!append && !dry_run) {
1110                retcode = truncate_fetch_head();
1111                if (retcode)
1112                        goto cleanup;
1113        }
1114
1115        ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1116        if (!update_head_ok)
1117                check_not_current_branch(ref_map);
1118
1119        for (rm = ref_map; rm; rm = rm->next) {
1120                if (rm->peer_ref) {
1121                        struct string_list_item *peer_item =
1122                                string_list_lookup(&existing_refs,
1123                                                   rm->peer_ref->name);
1124                        if (peer_item) {
1125                                struct object_id *old_oid = peer_item->util;
1126                                oidcpy(&rm->peer_ref->old_oid, old_oid);
1127                        }
1128                }
1129        }
1130
1131        if (tags == TAGS_DEFAULT && autotags)
1132                transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1133        if (prune) {
1134                /*
1135                 * We only prune based on refspecs specified
1136                 * explicitly (via command line or configuration); we
1137                 * don't care whether --tags was specified.
1138                 */
1139                if (ref_count) {
1140                        prune_refs(refs, ref_count, ref_map, transport->url);
1141                } else {
1142                        prune_refs(transport->remote->fetch,
1143                                   transport->remote->fetch_refspec_nr,
1144                                   ref_map,
1145                                   transport->url);
1146                }
1147        }
1148        if (fetch_refs(transport, ref_map)) {
1149                free_refs(ref_map);
1150                retcode = 1;
1151                goto cleanup;
1152        }
1153        free_refs(ref_map);
1154
1155        /* if neither --no-tags nor --tags was specified, do automated tag
1156         * following ... */
1157        if (tags == TAGS_DEFAULT && autotags) {
1158                struct ref **tail = &ref_map;
1159                ref_map = NULL;
1160                find_non_local_tags(transport, &ref_map, &tail);
1161                if (ref_map)
1162                        backfill_tags(transport, ref_map);
1163                free_refs(ref_map);
1164        }
1165
1166 cleanup:
1167        string_list_clear(&existing_refs, 1);
1168        return retcode;
1169}
1170
1171static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1172{
1173        struct string_list *list = priv;
1174        if (!remote->skip_default_update)
1175                string_list_append(list, remote->name);
1176        return 0;
1177}
1178
1179struct remote_group_data {
1180        const char *name;
1181        struct string_list *list;
1182};
1183
1184static int get_remote_group(const char *key, const char *value, void *priv)
1185{
1186        struct remote_group_data *g = priv;
1187
1188        if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1189                /* split list by white space */
1190                while (*value) {
1191                        size_t wordlen = strcspn(value, " \t\n");
1192
1193                        if (wordlen >= 1)
1194                                string_list_append_nodup(g->list,
1195                                                   xstrndup(value, wordlen));
1196                        value += wordlen + (value[wordlen] != '\0');
1197                }
1198        }
1199
1200        return 0;
1201}
1202
1203static int add_remote_or_group(const char *name, struct string_list *list)
1204{
1205        int prev_nr = list->nr;
1206        struct remote_group_data g;
1207        g.name = name; g.list = list;
1208
1209        git_config(get_remote_group, &g);
1210        if (list->nr == prev_nr) {
1211                struct remote *remote = remote_get(name);
1212                if (!remote_is_configured(remote, 0))
1213                        return 0;
1214                string_list_append(list, remote->name);
1215        }
1216        return 1;
1217}
1218
1219static void add_options_to_argv(struct argv_array *argv)
1220{
1221        if (dry_run)
1222                argv_array_push(argv, "--dry-run");
1223        if (prune != -1)
1224                argv_array_push(argv, prune ? "--prune" : "--no-prune");
1225        if (update_head_ok)
1226                argv_array_push(argv, "--update-head-ok");
1227        if (force)
1228                argv_array_push(argv, "--force");
1229        if (keep)
1230                argv_array_push(argv, "--keep");
1231        if (recurse_submodules == RECURSE_SUBMODULES_ON)
1232                argv_array_push(argv, "--recurse-submodules");
1233        else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1234                argv_array_push(argv, "--recurse-submodules=on-demand");
1235        if (tags == TAGS_SET)
1236                argv_array_push(argv, "--tags");
1237        else if (tags == TAGS_UNSET)
1238                argv_array_push(argv, "--no-tags");
1239        if (verbosity >= 2)
1240                argv_array_push(argv, "-v");
1241        if (verbosity >= 1)
1242                argv_array_push(argv, "-v");
1243        else if (verbosity < 0)
1244                argv_array_push(argv, "-q");
1245
1246}
1247
1248static int fetch_multiple(struct string_list *list)
1249{
1250        int i, result = 0;
1251        struct argv_array argv = ARGV_ARRAY_INIT;
1252
1253        if (!append && !dry_run) {
1254                int errcode = truncate_fetch_head();
1255                if (errcode)
1256                        return errcode;
1257        }
1258
1259        argv_array_pushl(&argv, "fetch", "--append", NULL);
1260        add_options_to_argv(&argv);
1261
1262        for (i = 0; i < list->nr; i++) {
1263                const char *name = list->items[i].string;
1264                argv_array_push(&argv, name);
1265                if (verbosity >= 0)
1266                        printf(_("Fetching %s\n"), name);
1267                if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1268                        error(_("Could not fetch %s"), name);
1269                        result = 1;
1270                }
1271                argv_array_pop(&argv);
1272        }
1273
1274        argv_array_clear(&argv);
1275        return result;
1276}
1277
1278static int fetch_one(struct remote *remote, int argc, const char **argv)
1279{
1280        static const char **refs = NULL;
1281        struct refspec *refspec;
1282        int ref_nr = 0;
1283        int exit_code;
1284
1285        if (!remote)
1286                die(_("No remote repository specified.  Please, specify either a URL or a\n"
1287                    "remote name from which new revisions should be fetched."));
1288
1289        gtransport = prepare_transport(remote, 1);
1290
1291        if (prune < 0) {
1292                /* no command line request */
1293                if (0 <= gtransport->remote->prune)
1294                        prune = gtransport->remote->prune;
1295                else if (0 <= fetch_prune_config)
1296                        prune = fetch_prune_config;
1297                else
1298                        prune = PRUNE_BY_DEFAULT;
1299        }
1300
1301        if (argc > 0) {
1302                int j = 0;
1303                int i;
1304                refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1305                for (i = 0; i < argc; i++) {
1306                        if (!strcmp(argv[i], "tag")) {
1307                                i++;
1308                                if (i >= argc)
1309                                        die(_("You need to specify a tag name."));
1310                                refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1311                                                    argv[i], argv[i]);
1312                        } else
1313                                refs[j++] = argv[i];
1314                }
1315                refs[j] = NULL;
1316                ref_nr = j;
1317        }
1318
1319        sigchain_push_common(unlock_pack_on_signal);
1320        atexit(unlock_pack);
1321        refspec = parse_fetch_refspec(ref_nr, refs);
1322        exit_code = do_fetch(gtransport, refspec, ref_nr);
1323        free_refspec(ref_nr, refspec);
1324        transport_disconnect(gtransport);
1325        gtransport = NULL;
1326        return exit_code;
1327}
1328
1329int cmd_fetch(int argc, const char **argv, const char *prefix)
1330{
1331        int i;
1332        struct string_list list = STRING_LIST_INIT_DUP;
1333        struct remote *remote = NULL;
1334        int result = 0;
1335        struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1336
1337        packet_trace_identity("fetch");
1338
1339        fetch_if_missing = 0;
1340
1341        /* Record the command line for the reflog */
1342        strbuf_addstr(&default_rla, "fetch");
1343        for (i = 1; i < argc; i++)
1344                strbuf_addf(&default_rla, " %s", argv[i]);
1345
1346        config_from_gitmodules(gitmodules_fetch_config, NULL);
1347        git_config(git_fetch_config, NULL);
1348
1349        argc = parse_options(argc, argv, prefix,
1350                             builtin_fetch_options, builtin_fetch_usage, 0);
1351
1352        if (deepen_relative) {
1353                if (deepen_relative < 0)
1354                        die(_("Negative depth in --deepen is not supported"));
1355                if (depth)
1356                        die(_("--deepen and --depth are mutually exclusive"));
1357                depth = xstrfmt("%d", deepen_relative);
1358        }
1359        if (unshallow) {
1360                if (depth)
1361                        die(_("--depth and --unshallow cannot be used together"));
1362                else if (!is_repository_shallow())
1363                        die(_("--unshallow on a complete repository does not make sense"));
1364                else
1365                        depth = xstrfmt("%d", INFINITE_DEPTH);
1366        }
1367
1368        /* no need to be strict, transport_set_option() will validate it again */
1369        if (depth && atoi(depth) < 1)
1370                die(_("depth %s is not a positive number"), depth);
1371        if (depth || deepen_since || deepen_not.nr)
1372                deepen = 1;
1373
1374        if (filter_options.choice && !repository_format_partial_clone)
1375                die("--filter can only be used when extensions.partialClone is set");
1376
1377        if (all) {
1378                if (argc == 1)
1379                        die(_("fetch --all does not take a repository argument"));
1380                else if (argc > 1)
1381                        die(_("fetch --all does not make sense with refspecs"));
1382                (void) for_each_remote(get_one_remote_for_fetch, &list);
1383        } else if (argc == 0) {
1384                /* No arguments -- use default remote */
1385                remote = remote_get(NULL);
1386        } else if (multiple) {
1387                /* All arguments are assumed to be remotes or groups */
1388                for (i = 0; i < argc; i++)
1389                        if (!add_remote_or_group(argv[i], &list))
1390                                die(_("No such remote or remote group: %s"), argv[i]);
1391        } else {
1392                /* Single remote or group */
1393                (void) add_remote_or_group(argv[0], &list);
1394                if (list.nr > 1) {
1395                        /* More than one remote */
1396                        if (argc > 1)
1397                                die(_("Fetching a group and specifying refspecs does not make sense"));
1398                } else {
1399                        /* Zero or one remotes */
1400                        remote = remote_get(argv[0]);
1401                        argc--;
1402                        argv++;
1403                }
1404        }
1405
1406        if (remote) {
1407                if (filter_options.choice &&
1408                    strcmp(remote->name, repository_format_partial_clone))
1409                        die(_("--filter can only be used with the remote configured in core.partialClone"));
1410                result = fetch_one(remote, argc, argv);
1411        } else {
1412                if (filter_options.choice)
1413                        die(_("--filter can only be used with the remote configured in core.partialClone"));
1414                result = fetch_multiple(&list);
1415        }
1416
1417        if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1418                struct argv_array options = ARGV_ARRAY_INIT;
1419
1420                add_options_to_argv(&options);
1421                result = fetch_populated_submodules(&options,
1422                                                    submodule_prefix,
1423                                                    recurse_submodules,
1424                                                    recurse_submodules_default,
1425                                                    verbosity < 0,
1426                                                    max_children);
1427                argv_array_clear(&options);
1428        }
1429
1430        string_list_clear(&list, 0);
1431
1432        close_all_packs();
1433
1434        argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1435        if (verbosity < 0)
1436                argv_array_push(&argv_gc_auto, "--quiet");
1437        run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1438        argv_array_clear(&argv_gc_auto);
1439
1440        return result;
1441}