builtin / fetch.con commit convert "hashcmp() != 0" to "!hasheq()" (67947c3)
   1/*
   2 * "git fetch"
   3 */
   4#include "cache.h"
   5#include "config.h"
   6#include "repository.h"
   7#include "refs.h"
   8#include "refspec.h"
   9#include "object-store.h"
  10#include "commit.h"
  11#include "builtin.h"
  12#include "string-list.h"
  13#include "remote.h"
  14#include "transport.h"
  15#include "run-command.h"
  16#include "parse-options.h"
  17#include "sigchain.h"
  18#include "submodule-config.h"
  19#include "submodule.h"
  20#include "connected.h"
  21#include "argv-array.h"
  22#include "utf8.h"
  23#include "packfile.h"
  24#include "list-objects-filter-options.h"
  25
  26static const char * const builtin_fetch_usage[] = {
  27        N_("git fetch [<options>] [<repository> [<refspec>...]]"),
  28        N_("git fetch [<options>] <group>"),
  29        N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
  30        N_("git fetch --all [<options>]"),
  31        NULL
  32};
  33
  34enum {
  35        TAGS_UNSET = 0,
  36        TAGS_DEFAULT = 1,
  37        TAGS_SET = 2
  38};
  39
  40static int fetch_prune_config = -1; /* unspecified */
  41static int prune = -1; /* unspecified */
  42#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
  43
  44static int fetch_prune_tags_config = -1; /* unspecified */
  45static int prune_tags = -1; /* unspecified */
  46#define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
  47
  48static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
  49static int progress = -1;
  50static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
  51static int max_children = 1;
  52static enum transport_family family;
  53static const char *depth;
  54static const char *deepen_since;
  55static const char *upload_pack;
  56static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
  57static struct strbuf default_rla = STRBUF_INIT;
  58static struct transport *gtransport;
  59static struct transport *gsecondary;
  60static const char *submodule_prefix = "";
  61static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  62static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
  63static int shown_url = 0;
  64static struct refspec refmap = REFSPEC_INIT_FETCH;
  65static struct list_objects_filter_options filter_options;
  66static struct string_list server_options = STRING_LIST_INIT_DUP;
  67static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
  68
  69static int git_fetch_config(const char *k, const char *v, void *cb)
  70{
  71        if (!strcmp(k, "fetch.prune")) {
  72                fetch_prune_config = git_config_bool(k, v);
  73                return 0;
  74        }
  75
  76        if (!strcmp(k, "fetch.prunetags")) {
  77                fetch_prune_tags_config = git_config_bool(k, v);
  78                return 0;
  79        }
  80
  81        if (!strcmp(k, "submodule.recurse")) {
  82                int r = git_config_bool(k, v) ?
  83                        RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
  84                recurse_submodules = r;
  85        }
  86
  87        if (!strcmp(k, "submodule.fetchjobs")) {
  88                max_children = parse_submodule_fetchjobs(k, v);
  89                return 0;
  90        } else if (!strcmp(k, "fetch.recursesubmodules")) {
  91                recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
  92                return 0;
  93        }
  94
  95        return git_default_config(k, v, cb);
  96}
  97
  98static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
  99{
 100        /*
 101         * "git fetch --refmap='' origin foo"
 102         * can be used to tell the command not to store anywhere
 103         */
 104        refspec_append(&refmap, arg);
 105
 106        return 0;
 107}
 108
 109static struct option builtin_fetch_options[] = {
 110        OPT__VERBOSITY(&verbosity),
 111        OPT_BOOL(0, "all", &all,
 112                 N_("fetch from all remotes")),
 113        OPT_BOOL('a', "append", &append,
 114                 N_("append to .git/FETCH_HEAD instead of overwriting")),
 115        OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 116                   N_("path to upload pack on remote end")),
 117        OPT__FORCE(&force, N_("force overwrite of local branch"), 0),
 118        OPT_BOOL('m', "multiple", &multiple,
 119                 N_("fetch from multiple remotes")),
 120        OPT_SET_INT('t', "tags", &tags,
 121                    N_("fetch all tags and associated objects"), TAGS_SET),
 122        OPT_SET_INT('n', NULL, &tags,
 123                    N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
 124        OPT_INTEGER('j', "jobs", &max_children,
 125                    N_("number of submodules fetched in parallel")),
 126        OPT_BOOL('p', "prune", &prune,
 127                 N_("prune remote-tracking branches no longer on remote")),
 128        OPT_BOOL('P', "prune-tags", &prune_tags,
 129                 N_("prune local tags no longer on remote and clobber changed tags")),
 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        OPT_SET_INT_F(0, "unshallow", &unshallow,
 148                      N_("convert to a complete repository"),
 149                      1, PARSE_OPT_NONEG),
 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_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
 162        OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 163                        TRANSPORT_FAMILY_IPV4),
 164        OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 165                        TRANSPORT_FAMILY_IPV6),
 166        OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
 167                        N_("report that we have only objects reachable from this object")),
 168        OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 169        OPT_END()
 170};
 171
 172static void unlock_pack(void)
 173{
 174        if (gtransport)
 175                transport_unlock_pack(gtransport);
 176        if (gsecondary)
 177                transport_unlock_pack(gsecondary);
 178}
 179
 180static void unlock_pack_on_signal(int signo)
 181{
 182        unlock_pack();
 183        sigchain_pop(signo);
 184        raise(signo);
 185}
 186
 187static void add_merge_config(struct ref **head,
 188                           const struct ref *remote_refs,
 189                           struct branch *branch,
 190                           struct ref ***tail)
 191{
 192        int i;
 193
 194        for (i = 0; i < branch->merge_nr; i++) {
 195                struct ref *rm, **old_tail = *tail;
 196                struct refspec_item refspec;
 197
 198                for (rm = *head; rm; rm = rm->next) {
 199                        if (branch_merge_matches(branch, i, rm->name)) {
 200                                rm->fetch_head_status = FETCH_HEAD_MERGE;
 201                                break;
 202                        }
 203                }
 204                if (rm)
 205                        continue;
 206
 207                /*
 208                 * Not fetched to a remote-tracking branch?  We need to fetch
 209                 * it anyway to allow this branch's "branch.$name.merge"
 210                 * to be honored by 'git pull', but we do not have to
 211                 * fail if branch.$name.merge is misconfigured to point
 212                 * at a nonexisting branch.  If we were indeed called by
 213                 * 'git pull', it will notice the misconfiguration because
 214                 * there is no entry in the resulting FETCH_HEAD marked
 215                 * for merging.
 216                 */
 217                memset(&refspec, 0, sizeof(refspec));
 218                refspec.src = branch->merge[i]->src;
 219                get_fetch_map(remote_refs, &refspec, tail, 1);
 220                for (rm = *old_tail; rm; rm = rm->next)
 221                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 222        }
 223}
 224
 225static int add_existing(const char *refname, const struct object_id *oid,
 226                        int flag, void *cbdata)
 227{
 228        struct string_list *list = (struct string_list *)cbdata;
 229        struct string_list_item *item = string_list_insert(list, refname);
 230        struct object_id *old_oid = xmalloc(sizeof(*old_oid));
 231
 232        oidcpy(old_oid, oid);
 233        item->util = old_oid;
 234        return 0;
 235}
 236
 237static int will_fetch(struct ref **head, const unsigned char *sha1)
 238{
 239        struct ref *rm = *head;
 240        while (rm) {
 241                if (hasheq(rm->old_oid.hash, sha1))
 242                        return 1;
 243                rm = rm->next;
 244        }
 245        return 0;
 246}
 247
 248static void find_non_local_tags(const struct ref *refs,
 249                                struct ref **head,
 250                                struct ref ***tail)
 251{
 252        struct string_list existing_refs = STRING_LIST_INIT_DUP;
 253        struct string_list remote_refs = STRING_LIST_INIT_NODUP;
 254        const struct ref *ref;
 255        struct string_list_item *item = NULL;
 256
 257        for_each_ref(add_existing, &existing_refs);
 258        for (ref = refs; ref; ref = ref->next) {
 259                if (!starts_with(ref->name, "refs/tags/"))
 260                        continue;
 261
 262                /*
 263                 * The peeled ref always follows the matching base
 264                 * ref, so if we see a peeled ref that we don't want
 265                 * to fetch then we can mark the ref entry in the list
 266                 * as one to ignore by setting util to NULL.
 267                 */
 268                if (ends_with(ref->name, "^{}")) {
 269                        if (item &&
 270                            !has_object_file_with_flags(&ref->old_oid,
 271                                                        OBJECT_INFO_QUICK) &&
 272                            !will_fetch(head, ref->old_oid.hash) &&
 273                            !has_sha1_file_with_flags(item->util,
 274                                                      OBJECT_INFO_QUICK) &&
 275                            !will_fetch(head, item->util))
 276                                item->util = NULL;
 277                        item = NULL;
 278                        continue;
 279                }
 280
 281                /*
 282                 * If item is non-NULL here, then we previously saw a
 283                 * ref not followed by a peeled reference, so we need
 284                 * to check if it is a lightweight tag that we want to
 285                 * fetch.
 286                 */
 287                if (item &&
 288                    !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 289                    !will_fetch(head, item->util))
 290                        item->util = NULL;
 291
 292                item = NULL;
 293
 294                /* skip duplicates and refs that we already have */
 295                if (string_list_has_string(&remote_refs, ref->name) ||
 296                    string_list_has_string(&existing_refs, ref->name))
 297                        continue;
 298
 299                item = string_list_insert(&remote_refs, ref->name);
 300                item->util = (void *)&ref->old_oid;
 301        }
 302        string_list_clear(&existing_refs, 1);
 303
 304        /*
 305         * We may have a final lightweight tag that needs to be
 306         * checked to see if it needs fetching.
 307         */
 308        if (item &&
 309            !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
 310            !will_fetch(head, item->util))
 311                item->util = NULL;
 312
 313        /*
 314         * For all the tags in the remote_refs string list,
 315         * add them to the list of refs to be fetched
 316         */
 317        for_each_string_list_item(item, &remote_refs) {
 318                /* Unless we have already decided to ignore this item... */
 319                if (item->util)
 320                {
 321                        struct ref *rm = alloc_ref(item->string);
 322                        rm->peer_ref = alloc_ref(item->string);
 323                        oidcpy(&rm->old_oid, item->util);
 324                        **tail = rm;
 325                        *tail = &rm->next;
 326                }
 327        }
 328
 329        string_list_clear(&remote_refs, 0);
 330}
 331
 332static struct ref *get_ref_map(struct remote *remote,
 333                               const struct ref *remote_refs,
 334                               struct refspec *rs,
 335                               int tags, int *autotags)
 336{
 337        int i;
 338        struct ref *rm;
 339        struct ref *ref_map = NULL;
 340        struct ref **tail = &ref_map;
 341
 342        /* opportunistically-updated references: */
 343        struct ref *orefs = NULL, **oref_tail = &orefs;
 344
 345        struct string_list existing_refs = STRING_LIST_INIT_DUP;
 346
 347        if (rs->nr) {
 348                struct refspec *fetch_refspec;
 349
 350                for (i = 0; i < rs->nr; i++) {
 351                        get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
 352                        if (rs->items[i].dst && rs->items[i].dst[0])
 353                                *autotags = 1;
 354                }
 355                /* Merge everything on the command line (but not --tags) */
 356                for (rm = ref_map; rm; rm = rm->next)
 357                        rm->fetch_head_status = FETCH_HEAD_MERGE;
 358
 359                /*
 360                 * For any refs that we happen to be fetching via
 361                 * command-line arguments, the destination ref might
 362                 * have been missing or have been different than the
 363                 * remote-tracking ref that would be derived from the
 364                 * configured refspec.  In these cases, we want to
 365                 * take the opportunity to update their configured
 366                 * remote-tracking reference.  However, we do not want
 367                 * to mention these entries in FETCH_HEAD at all, as
 368                 * they would simply be duplicates of existing
 369                 * entries, so we set them FETCH_HEAD_IGNORE below.
 370                 *
 371                 * We compute these entries now, based only on the
 372                 * refspecs specified on the command line.  But we add
 373                 * them to the list following the refspecs resulting
 374                 * from the tags option so that one of the latter,
 375                 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
 376                 * by ref_remove_duplicates() in favor of one of these
 377                 * opportunistic entries with FETCH_HEAD_IGNORE.
 378                 */
 379                if (refmap.nr)
 380                        fetch_refspec = &refmap;
 381                else
 382                        fetch_refspec = &remote->fetch;
 383
 384                for (i = 0; i < fetch_refspec->nr; i++)
 385                        get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
 386        } else if (refmap.nr) {
 387                die("--refmap option is only meaningful with command-line refspec(s).");
 388        } else {
 389                /* Use the defaults */
 390                struct branch *branch = branch_get(NULL);
 391                int has_merge = branch_has_merge_config(branch);
 392                if (remote &&
 393                    (remote->fetch.nr ||
 394                     /* Note: has_merge implies non-NULL branch->remote_name */
 395                     (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 396                        for (i = 0; i < remote->fetch.nr; i++) {
 397                                get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
 398                                if (remote->fetch.items[i].dst &&
 399                                    remote->fetch.items[i].dst[0])
 400                                        *autotags = 1;
 401                                if (!i && !has_merge && ref_map &&
 402                                    !remote->fetch.items[0].pattern)
 403                                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 404                        }
 405                        /*
 406                         * if the remote we're fetching from is the same
 407                         * as given in branch.<name>.remote, we add the
 408                         * ref given in branch.<name>.merge, too.
 409                         *
 410                         * Note: has_merge implies non-NULL branch->remote_name
 411                         */
 412                        if (has_merge &&
 413                            !strcmp(branch->remote_name, remote->name))
 414                                add_merge_config(&ref_map, remote_refs, branch, &tail);
 415                } else {
 416                        ref_map = get_remote_ref(remote_refs, "HEAD");
 417                        if (!ref_map)
 418                                die(_("Couldn't find remote ref HEAD"));
 419                        ref_map->fetch_head_status = FETCH_HEAD_MERGE;
 420                        tail = &ref_map->next;
 421                }
 422        }
 423
 424        if (tags == TAGS_SET)
 425                /* also fetch all tags */
 426                get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 427        else if (tags == TAGS_DEFAULT && *autotags)
 428                find_non_local_tags(remote_refs, &ref_map, &tail);
 429
 430        /* Now append any refs to be updated opportunistically: */
 431        *tail = orefs;
 432        for (rm = orefs; rm; rm = rm->next) {
 433                rm->fetch_head_status = FETCH_HEAD_IGNORE;
 434                tail = &rm->next;
 435        }
 436
 437        ref_map = ref_remove_duplicates(ref_map);
 438
 439        for_each_ref(add_existing, &existing_refs);
 440        for (rm = ref_map; rm; rm = rm->next) {
 441                if (rm->peer_ref) {
 442                        struct string_list_item *peer_item =
 443                                string_list_lookup(&existing_refs,
 444                                                   rm->peer_ref->name);
 445                        if (peer_item) {
 446                                struct object_id *old_oid = peer_item->util;
 447                                oidcpy(&rm->peer_ref->old_oid, old_oid);
 448                        }
 449                }
 450        }
 451        string_list_clear(&existing_refs, 1);
 452
 453        return ref_map;
 454}
 455
 456#define STORE_REF_ERROR_OTHER 1
 457#define STORE_REF_ERROR_DF_CONFLICT 2
 458
 459static int s_update_ref(const char *action,
 460                        struct ref *ref,
 461                        int check_old)
 462{
 463        char *msg;
 464        char *rla = getenv("GIT_REFLOG_ACTION");
 465        struct ref_transaction *transaction;
 466        struct strbuf err = STRBUF_INIT;
 467        int ret, df_conflict = 0;
 468
 469        if (dry_run)
 470                return 0;
 471        if (!rla)
 472                rla = default_rla.buf;
 473        msg = xstrfmt("%s: %s", rla, action);
 474
 475        transaction = ref_transaction_begin(&err);
 476        if (!transaction ||
 477            ref_transaction_update(transaction, ref->name,
 478                                   &ref->new_oid,
 479                                   check_old ? &ref->old_oid : NULL,
 480                                   0, msg, &err))
 481                goto fail;
 482
 483        ret = ref_transaction_commit(transaction, &err);
 484        if (ret) {
 485                df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
 486                goto fail;
 487        }
 488
 489        ref_transaction_free(transaction);
 490        strbuf_release(&err);
 491        free(msg);
 492        return 0;
 493fail:
 494        ref_transaction_free(transaction);
 495        error("%s", err.buf);
 496        strbuf_release(&err);
 497        free(msg);
 498        return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
 499                           : STORE_REF_ERROR_OTHER;
 500}
 501
 502static int refcol_width = 10;
 503static int compact_format;
 504
 505static void adjust_refcol_width(const struct ref *ref)
 506{
 507        int max, rlen, llen, len;
 508
 509        /* uptodate lines are only shown on high verbosity level */
 510        if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
 511                return;
 512
 513        max    = term_columns();
 514        rlen   = utf8_strwidth(prettify_refname(ref->name));
 515
 516        llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
 517
 518        /*
 519         * rough estimation to see if the output line is too long and
 520         * should not be counted (we can't do precise calculation
 521         * anyway because we don't know if the error explanation part
 522         * will be printed in update_local_ref)
 523         */
 524        if (compact_format) {
 525                llen = 0;
 526                max = max * 2 / 3;
 527        }
 528        len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
 529        if (len >= max)
 530                return;
 531
 532        /*
 533         * Not precise calculation for compact mode because '*' can
 534         * appear on the left hand side of '->' and shrink the column
 535         * back.
 536         */
 537        if (refcol_width < rlen)
 538                refcol_width = rlen;
 539}
 540
 541static void prepare_format_display(struct ref *ref_map)
 542{
 543        struct ref *rm;
 544        const char *format = "full";
 545
 546        git_config_get_string_const("fetch.output", &format);
 547        if (!strcasecmp(format, "full"))
 548                compact_format = 0;
 549        else if (!strcasecmp(format, "compact"))
 550                compact_format = 1;
 551        else
 552                die(_("configuration fetch.output contains invalid value %s"),
 553                    format);
 554
 555        for (rm = ref_map; rm; rm = rm->next) {
 556                if (rm->status == REF_STATUS_REJECT_SHALLOW ||
 557                    !rm->peer_ref ||
 558                    !strcmp(rm->name, "HEAD"))
 559                        continue;
 560
 561                adjust_refcol_width(rm);
 562        }
 563}
 564
 565static void print_remote_to_local(struct strbuf *display,
 566                                  const char *remote, const char *local)
 567{
 568        strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
 569}
 570
 571static int find_and_replace(struct strbuf *haystack,
 572                            const char *needle,
 573                            const char *placeholder)
 574{
 575        const char *p = strstr(haystack->buf, needle);
 576        int plen, nlen;
 577
 578        if (!p)
 579                return 0;
 580
 581        if (p > haystack->buf && p[-1] != '/')
 582                return 0;
 583
 584        plen = strlen(p);
 585        nlen = strlen(needle);
 586        if (plen > nlen && p[nlen] != '/')
 587                return 0;
 588
 589        strbuf_splice(haystack, p - haystack->buf, nlen,
 590                      placeholder, strlen(placeholder));
 591        return 1;
 592}
 593
 594static void print_compact(struct strbuf *display,
 595                          const char *remote, const char *local)
 596{
 597        struct strbuf r = STRBUF_INIT;
 598        struct strbuf l = STRBUF_INIT;
 599
 600        if (!strcmp(remote, local)) {
 601                strbuf_addf(display, "%-*s -> *", refcol_width, remote);
 602                return;
 603        }
 604
 605        strbuf_addstr(&r, remote);
 606        strbuf_addstr(&l, local);
 607
 608        if (!find_and_replace(&r, local, "*"))
 609                find_and_replace(&l, remote, "*");
 610        print_remote_to_local(display, r.buf, l.buf);
 611
 612        strbuf_release(&r);
 613        strbuf_release(&l);
 614}
 615
 616static void format_display(struct strbuf *display, char code,
 617                           const char *summary, const char *error,
 618                           const char *remote, const char *local,
 619                           int summary_width)
 620{
 621        int width = (summary_width + strlen(summary) - gettext_width(summary));
 622
 623        strbuf_addf(display, "%c %-*s ", code, width, summary);
 624        if (!compact_format)
 625                print_remote_to_local(display, remote, local);
 626        else
 627                print_compact(display, remote, local);
 628        if (error)
 629                strbuf_addf(display, "  (%s)", error);
 630}
 631
 632static int update_local_ref(struct ref *ref,
 633                            const char *remote,
 634                            const struct ref *remote_ref,
 635                            struct strbuf *display,
 636                            int summary_width)
 637{
 638        struct commit *current = NULL, *updated;
 639        enum object_type type;
 640        struct branch *current_branch = branch_get(NULL);
 641        const char *pretty_ref = prettify_refname(ref->name);
 642
 643        type = oid_object_info(the_repository, &ref->new_oid, NULL);
 644        if (type < 0)
 645                die(_("object %s not found"), oid_to_hex(&ref->new_oid));
 646
 647        if (oideq(&ref->old_oid, &ref->new_oid)) {
 648                if (verbosity > 0)
 649                        format_display(display, '=', _("[up to date]"), NULL,
 650                                       remote, pretty_ref, summary_width);
 651                return 0;
 652        }
 653
 654        if (current_branch &&
 655            !strcmp(ref->name, current_branch->name) &&
 656            !(update_head_ok || is_bare_repository()) &&
 657            !is_null_oid(&ref->old_oid)) {
 658                /*
 659                 * If this is the head, and it's not okay to update
 660                 * the head, and the old value of the head isn't empty...
 661                 */
 662                format_display(display, '!', _("[rejected]"),
 663                               _("can't fetch in current branch"),
 664                               remote, pretty_ref, summary_width);
 665                return 1;
 666        }
 667
 668        if (!is_null_oid(&ref->old_oid) &&
 669            starts_with(ref->name, "refs/tags/")) {
 670                int r;
 671                r = s_update_ref("updating tag", ref, 0);
 672                format_display(display, r ? '!' : 't', _("[tag update]"),
 673                               r ? _("unable to update local ref") : NULL,
 674                               remote, pretty_ref, summary_width);
 675                return r;
 676        }
 677
 678        current = lookup_commit_reference_gently(the_repository,
 679                                                 &ref->old_oid, 1);
 680        updated = lookup_commit_reference_gently(the_repository,
 681                                                 &ref->new_oid, 1);
 682        if (!current || !updated) {
 683                const char *msg;
 684                const char *what;
 685                int r;
 686                /*
 687                 * Nicely describe the new ref we're fetching.
 688                 * Base this on the remote's ref name, as it's
 689                 * more likely to follow a standard layout.
 690                 */
 691                const char *name = remote_ref ? remote_ref->name : "";
 692                if (starts_with(name, "refs/tags/")) {
 693                        msg = "storing tag";
 694                        what = _("[new tag]");
 695                } else if (starts_with(name, "refs/heads/")) {
 696                        msg = "storing head";
 697                        what = _("[new branch]");
 698                } else {
 699                        msg = "storing ref";
 700                        what = _("[new ref]");
 701                }
 702
 703                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 704                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 705                        check_for_new_submodule_commits(&ref->new_oid);
 706                r = s_update_ref(msg, ref, 0);
 707                format_display(display, r ? '!' : '*', what,
 708                               r ? _("unable to update local ref") : NULL,
 709                               remote, pretty_ref, summary_width);
 710                return r;
 711        }
 712
 713        if (in_merge_bases(current, updated)) {
 714                struct strbuf quickref = STRBUF_INIT;
 715                int r;
 716                strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
 717                strbuf_addstr(&quickref, "..");
 718                strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
 719                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 720                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 721                        check_for_new_submodule_commits(&ref->new_oid);
 722                r = s_update_ref("fast-forward", ref, 1);
 723                format_display(display, r ? '!' : ' ', quickref.buf,
 724                               r ? _("unable to update local ref") : NULL,
 725                               remote, pretty_ref, summary_width);
 726                strbuf_release(&quickref);
 727                return r;
 728        } else if (force || ref->force) {
 729                struct strbuf quickref = STRBUF_INIT;
 730                int r;
 731                strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
 732                strbuf_addstr(&quickref, "...");
 733                strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
 734                if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
 735                    (recurse_submodules != RECURSE_SUBMODULES_ON))
 736                        check_for_new_submodule_commits(&ref->new_oid);
 737                r = s_update_ref("forced-update", ref, 1);
 738                format_display(display, r ? '!' : '+', quickref.buf,
 739                               r ? _("unable to update local ref") : _("forced update"),
 740                               remote, pretty_ref, summary_width);
 741                strbuf_release(&quickref);
 742                return r;
 743        } else {
 744                format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
 745                               remote, pretty_ref, summary_width);
 746                return 1;
 747        }
 748}
 749
 750static int iterate_ref_map(void *cb_data, struct object_id *oid)
 751{
 752        struct ref **rm = cb_data;
 753        struct ref *ref = *rm;
 754
 755        while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
 756                ref = ref->next;
 757        if (!ref)
 758                return -1; /* end of the list */
 759        *rm = ref->next;
 760        oidcpy(oid, &ref->old_oid);
 761        return 0;
 762}
 763
 764static int store_updated_refs(const char *raw_url, const char *remote_name,
 765                              int connectivity_checked, struct ref *ref_map)
 766{
 767        FILE *fp;
 768        struct commit *commit;
 769        int url_len, i, rc = 0;
 770        struct strbuf note = STRBUF_INIT;
 771        const char *what, *kind;
 772        struct ref *rm;
 773        char *url;
 774        const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
 775        int want_status;
 776        int summary_width = transport_summary_width(ref_map);
 777
 778        fp = fopen(filename, "a");
 779        if (!fp)
 780                return error_errno(_("cannot open %s"), filename);
 781
 782        if (raw_url)
 783                url = transport_anonymize_url(raw_url);
 784        else
 785                url = xstrdup("foreign");
 786
 787        if (!connectivity_checked) {
 788                rm = ref_map;
 789                if (check_connected(iterate_ref_map, &rm, NULL)) {
 790                        rc = error(_("%s did not send all necessary objects\n"), url);
 791                        goto abort;
 792                }
 793        }
 794
 795        prepare_format_display(ref_map);
 796
 797        /*
 798         * We do a pass for each fetch_head_status type in their enum order, so
 799         * merged entries are written before not-for-merge. That lets readers
 800         * use FETCH_HEAD as a refname to refer to the ref to be merged.
 801         */
 802        for (want_status = FETCH_HEAD_MERGE;
 803             want_status <= FETCH_HEAD_IGNORE;
 804             want_status++) {
 805                for (rm = ref_map; rm; rm = rm->next) {
 806                        struct ref *ref = NULL;
 807                        const char *merge_status_marker = "";
 808
 809                        if (rm->status == REF_STATUS_REJECT_SHALLOW) {
 810                                if (want_status == FETCH_HEAD_MERGE)
 811                                        warning(_("reject %s because shallow roots are not allowed to be updated"),
 812                                                rm->peer_ref ? rm->peer_ref->name : rm->name);
 813                                continue;
 814                        }
 815
 816                        commit = lookup_commit_reference_gently(the_repository,
 817                                                                &rm->old_oid,
 818                                                                1);
 819                        if (!commit)
 820                                rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
 821
 822                        if (rm->fetch_head_status != want_status)
 823                                continue;
 824
 825                        if (rm->peer_ref) {
 826                                ref = alloc_ref(rm->peer_ref->name);
 827                                oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
 828                                oidcpy(&ref->new_oid, &rm->old_oid);
 829                                ref->force = rm->peer_ref->force;
 830                        }
 831
 832
 833                        if (!strcmp(rm->name, "HEAD")) {
 834                                kind = "";
 835                                what = "";
 836                        }
 837                        else if (starts_with(rm->name, "refs/heads/")) {
 838                                kind = "branch";
 839                                what = rm->name + 11;
 840                        }
 841                        else if (starts_with(rm->name, "refs/tags/")) {
 842                                kind = "tag";
 843                                what = rm->name + 10;
 844                        }
 845                        else if (starts_with(rm->name, "refs/remotes/")) {
 846                                kind = "remote-tracking branch";
 847                                what = rm->name + 13;
 848                        }
 849                        else {
 850                                kind = "";
 851                                what = rm->name;
 852                        }
 853
 854                        url_len = strlen(url);
 855                        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 856                                ;
 857                        url_len = i + 1;
 858                        if (4 < i && !strncmp(".git", url + i - 3, 4))
 859                                url_len = i - 3;
 860
 861                        strbuf_reset(&note);
 862                        if (*what) {
 863                                if (*kind)
 864                                        strbuf_addf(&note, "%s ", kind);
 865                                strbuf_addf(&note, "'%s' of ", what);
 866                        }
 867                        switch (rm->fetch_head_status) {
 868                        case FETCH_HEAD_NOT_FOR_MERGE:
 869                                merge_status_marker = "not-for-merge";
 870                                /* fall-through */
 871                        case FETCH_HEAD_MERGE:
 872                                fprintf(fp, "%s\t%s\t%s",
 873                                        oid_to_hex(&rm->old_oid),
 874                                        merge_status_marker,
 875                                        note.buf);
 876                                for (i = 0; i < url_len; ++i)
 877                                        if ('\n' == url[i])
 878                                                fputs("\\n", fp);
 879                                        else
 880                                                fputc(url[i], fp);
 881                                fputc('\n', fp);
 882                                break;
 883                        default:
 884                                /* do not write anything to FETCH_HEAD */
 885                                break;
 886                        }
 887
 888                        strbuf_reset(&note);
 889                        if (ref) {
 890                                rc |= update_local_ref(ref, what, rm, &note,
 891                                                       summary_width);
 892                                free(ref);
 893                        } else
 894                                format_display(&note, '*',
 895                                               *kind ? kind : "branch", NULL,
 896                                               *what ? what : "HEAD",
 897                                               "FETCH_HEAD", summary_width);
 898                        if (note.len) {
 899                                if (verbosity >= 0 && !shown_url) {
 900                                        fprintf(stderr, _("From %.*s\n"),
 901                                                        url_len, url);
 902                                        shown_url = 1;
 903                                }
 904                                if (verbosity >= 0)
 905                                        fprintf(stderr, " %s\n", note.buf);
 906                        }
 907                }
 908        }
 909
 910        if (rc & STORE_REF_ERROR_DF_CONFLICT)
 911                error(_("some local refs could not be updated; try running\n"
 912                      " 'git remote prune %s' to remove any old, conflicting "
 913                      "branches"), remote_name);
 914
 915 abort:
 916        strbuf_release(&note);
 917        free(url);
 918        fclose(fp);
 919        return rc;
 920}
 921
 922/*
 923 * We would want to bypass the object transfer altogether if
 924 * everything we are going to fetch already exists and is connected
 925 * locally.
 926 */
 927static int quickfetch(struct ref *ref_map)
 928{
 929        struct ref *rm = ref_map;
 930        struct check_connected_options opt = CHECK_CONNECTED_INIT;
 931
 932        /*
 933         * If we are deepening a shallow clone we already have these
 934         * objects reachable.  Running rev-list here will return with
 935         * a good (0) exit status and we'll bypass the fetch that we
 936         * really need to perform.  Claiming failure now will ensure
 937         * we perform the network exchange to deepen our history.
 938         */
 939        if (deepen)
 940                return -1;
 941        opt.quiet = 1;
 942        return check_connected(iterate_ref_map, &rm, &opt);
 943}
 944
 945static int fetch_refs(struct transport *transport, struct ref *ref_map)
 946{
 947        int ret = quickfetch(ref_map);
 948        if (ret)
 949                ret = transport_fetch_refs(transport, ref_map);
 950        if (!ret)
 951                /*
 952                 * Keep the new pack's ".keep" file around to allow the caller
 953                 * time to update refs to reference the new objects.
 954                 */
 955                return 0;
 956        transport_unlock_pack(transport);
 957        return ret;
 958}
 959
 960/* Update local refs based on the ref values fetched from a remote */
 961static int consume_refs(struct transport *transport, struct ref *ref_map)
 962{
 963        int connectivity_checked = transport->smart_options
 964                ? transport->smart_options->connectivity_checked : 0;
 965        int ret = store_updated_refs(transport->url,
 966                                     transport->remote->name,
 967                                     connectivity_checked,
 968                                     ref_map);
 969        transport_unlock_pack(transport);
 970        return ret;
 971}
 972
 973static int prune_refs(struct refspec *rs, struct ref *ref_map,
 974                      const char *raw_url)
 975{
 976        int url_len, i, result = 0;
 977        struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
 978        char *url;
 979        int summary_width = transport_summary_width(stale_refs);
 980        const char *dangling_msg = dry_run
 981                ? _("   (%s will become dangling)")
 982                : _("   (%s has become dangling)");
 983
 984        if (raw_url)
 985                url = transport_anonymize_url(raw_url);
 986        else
 987                url = xstrdup("foreign");
 988
 989        url_len = strlen(url);
 990        for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 991                ;
 992
 993        url_len = i + 1;
 994        if (4 < i && !strncmp(".git", url + i - 3, 4))
 995                url_len = i - 3;
 996
 997        if (!dry_run) {
 998                struct string_list refnames = STRING_LIST_INIT_NODUP;
 999
1000                for (ref = stale_refs; ref; ref = ref->next)
1001                        string_list_append(&refnames, ref->name);
1002
1003                result = delete_refs("fetch: prune", &refnames, 0);
1004                string_list_clear(&refnames, 0);
1005        }
1006
1007        if (verbosity >= 0) {
1008                for (ref = stale_refs; ref; ref = ref->next) {
1009                        struct strbuf sb = STRBUF_INIT;
1010                        if (!shown_url) {
1011                                fprintf(stderr, _("From %.*s\n"), url_len, url);
1012                                shown_url = 1;
1013                        }
1014                        format_display(&sb, '-', _("[deleted]"), NULL,
1015                                       _("(none)"), prettify_refname(ref->name),
1016                                       summary_width);
1017                        fprintf(stderr, " %s\n",sb.buf);
1018                        strbuf_release(&sb);
1019                        warn_dangling_symref(stderr, dangling_msg, ref->name);
1020                }
1021        }
1022
1023        free(url);
1024        free_refs(stale_refs);
1025        return result;
1026}
1027
1028static void check_not_current_branch(struct ref *ref_map)
1029{
1030        struct branch *current_branch = branch_get(NULL);
1031
1032        if (is_bare_repository() || !current_branch)
1033                return;
1034
1035        for (; ref_map; ref_map = ref_map->next)
1036                if (ref_map->peer_ref && !strcmp(current_branch->refname,
1037                                        ref_map->peer_ref->name))
1038                        die(_("Refusing to fetch into current branch %s "
1039                            "of non-bare repository"), current_branch->refname);
1040}
1041
1042static int truncate_fetch_head(void)
1043{
1044        const char *filename = git_path_fetch_head(the_repository);
1045        FILE *fp = fopen_for_writing(filename);
1046
1047        if (!fp)
1048                return error_errno(_("cannot open %s"), filename);
1049        fclose(fp);
1050        return 0;
1051}
1052
1053static void set_option(struct transport *transport, const char *name, const char *value)
1054{
1055        int r = transport_set_option(transport, name, value);
1056        if (r < 0)
1057                die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1058                    name, value, transport->url);
1059        if (r > 0)
1060                warning(_("Option \"%s\" is ignored for %s\n"),
1061                        name, transport->url);
1062}
1063
1064
1065static int add_oid(const char *refname, const struct object_id *oid, int flags,
1066                   void *cb_data)
1067{
1068        struct oid_array *oids = cb_data;
1069
1070        oid_array_append(oids, oid);
1071        return 0;
1072}
1073
1074static void add_negotiation_tips(struct git_transport_options *smart_options)
1075{
1076        struct oid_array *oids = xcalloc(1, sizeof(*oids));
1077        int i;
1078
1079        for (i = 0; i < negotiation_tip.nr; i++) {
1080                const char *s = negotiation_tip.items[i].string;
1081                int old_nr;
1082                if (!has_glob_specials(s)) {
1083                        struct object_id oid;
1084                        if (get_oid(s, &oid))
1085                                die("%s is not a valid object", s);
1086                        oid_array_append(oids, &oid);
1087                        continue;
1088                }
1089                old_nr = oids->nr;
1090                for_each_glob_ref(add_oid, s, oids);
1091                if (old_nr == oids->nr)
1092                        warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1093                                s);
1094        }
1095        smart_options->negotiation_tips = oids;
1096}
1097
1098static struct transport *prepare_transport(struct remote *remote, int deepen)
1099{
1100        struct transport *transport;
1101        transport = transport_get(remote, NULL);
1102        transport_set_verbosity(transport, verbosity, progress);
1103        transport->family = family;
1104        if (upload_pack)
1105                set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1106        if (keep)
1107                set_option(transport, TRANS_OPT_KEEP, "yes");
1108        if (depth)
1109                set_option(transport, TRANS_OPT_DEPTH, depth);
1110        if (deepen && deepen_since)
1111                set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1112        if (deepen && deepen_not.nr)
1113                set_option(transport, TRANS_OPT_DEEPEN_NOT,
1114                           (const char *)&deepen_not);
1115        if (deepen_relative)
1116                set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1117        if (update_shallow)
1118                set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1119        if (filter_options.choice) {
1120                set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1121                           filter_options.filter_spec);
1122                set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1123        }
1124        if (negotiation_tip.nr) {
1125                if (transport->smart_options)
1126                        add_negotiation_tips(transport->smart_options);
1127                else
1128                        warning("Ignoring --negotiation-tip because the protocol does not support it.");
1129        }
1130        return transport;
1131}
1132
1133static void backfill_tags(struct transport *transport, struct ref *ref_map)
1134{
1135        int cannot_reuse;
1136
1137        /*
1138         * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1139         * when remote helper is used (setting it to an empty string
1140         * is not unsetting). We could extend the remote helper
1141         * protocol for that, but for now, just force a new connection
1142         * without deepen-since. Similar story for deepen-not.
1143         */
1144        cannot_reuse = transport->cannot_reuse ||
1145                deepen_since || deepen_not.nr;
1146        if (cannot_reuse) {
1147                gsecondary = prepare_transport(transport->remote, 0);
1148                transport = gsecondary;
1149        }
1150
1151        transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1152        transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1153        transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1154        if (!fetch_refs(transport, ref_map))
1155                consume_refs(transport, ref_map);
1156
1157        if (gsecondary) {
1158                transport_disconnect(gsecondary);
1159                gsecondary = NULL;
1160        }
1161}
1162
1163static int do_fetch(struct transport *transport,
1164                    struct refspec *rs)
1165{
1166        struct ref *ref_map;
1167        int autotags = (transport->remote->fetch_tags == 1);
1168        int retcode = 0;
1169        const struct ref *remote_refs;
1170        struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1171
1172        if (tags == TAGS_DEFAULT) {
1173                if (transport->remote->fetch_tags == 2)
1174                        tags = TAGS_SET;
1175                if (transport->remote->fetch_tags == -1)
1176                        tags = TAGS_UNSET;
1177        }
1178
1179        /* if not appending, truncate FETCH_HEAD */
1180        if (!append && !dry_run) {
1181                retcode = truncate_fetch_head();
1182                if (retcode)
1183                        goto cleanup;
1184        }
1185
1186        if (rs->nr)
1187                refspec_ref_prefixes(rs, &ref_prefixes);
1188        else if (transport->remote && transport->remote->fetch.nr)
1189                refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1190
1191        if (ref_prefixes.argc &&
1192            (tags == TAGS_SET || (tags == TAGS_DEFAULT))) {
1193                argv_array_push(&ref_prefixes, "refs/tags/");
1194        }
1195
1196        remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1197        argv_array_clear(&ref_prefixes);
1198
1199        ref_map = get_ref_map(transport->remote, remote_refs, rs,
1200                              tags, &autotags);
1201        if (!update_head_ok)
1202                check_not_current_branch(ref_map);
1203
1204        if (tags == TAGS_DEFAULT && autotags)
1205                transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1206        if (prune) {
1207                /*
1208                 * We only prune based on refspecs specified
1209                 * explicitly (via command line or configuration); we
1210                 * don't care whether --tags was specified.
1211                 */
1212                if (rs->nr) {
1213                        prune_refs(rs, ref_map, transport->url);
1214                } else {
1215                        prune_refs(&transport->remote->fetch,
1216                                   ref_map,
1217                                   transport->url);
1218                }
1219        }
1220        if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1221                free_refs(ref_map);
1222                retcode = 1;
1223                goto cleanup;
1224        }
1225        free_refs(ref_map);
1226
1227        /* if neither --no-tags nor --tags was specified, do automated tag
1228         * following ... */
1229        if (tags == TAGS_DEFAULT && autotags) {
1230                struct ref **tail = &ref_map;
1231                ref_map = NULL;
1232                find_non_local_tags(remote_refs, &ref_map, &tail);
1233                if (ref_map)
1234                        backfill_tags(transport, ref_map);
1235                free_refs(ref_map);
1236        }
1237
1238 cleanup:
1239        return retcode;
1240}
1241
1242static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1243{
1244        struct string_list *list = priv;
1245        if (!remote->skip_default_update)
1246                string_list_append(list, remote->name);
1247        return 0;
1248}
1249
1250struct remote_group_data {
1251        const char *name;
1252        struct string_list *list;
1253};
1254
1255static int get_remote_group(const char *key, const char *value, void *priv)
1256{
1257        struct remote_group_data *g = priv;
1258
1259        if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1260                /* split list by white space */
1261                while (*value) {
1262                        size_t wordlen = strcspn(value, " \t\n");
1263
1264                        if (wordlen >= 1)
1265                                string_list_append_nodup(g->list,
1266                                                   xstrndup(value, wordlen));
1267                        value += wordlen + (value[wordlen] != '\0');
1268                }
1269        }
1270
1271        return 0;
1272}
1273
1274static int add_remote_or_group(const char *name, struct string_list *list)
1275{
1276        int prev_nr = list->nr;
1277        struct remote_group_data g;
1278        g.name = name; g.list = list;
1279
1280        git_config(get_remote_group, &g);
1281        if (list->nr == prev_nr) {
1282                struct remote *remote = remote_get(name);
1283                if (!remote_is_configured(remote, 0))
1284                        return 0;
1285                string_list_append(list, remote->name);
1286        }
1287        return 1;
1288}
1289
1290static void add_options_to_argv(struct argv_array *argv)
1291{
1292        if (dry_run)
1293                argv_array_push(argv, "--dry-run");
1294        if (prune != -1)
1295                argv_array_push(argv, prune ? "--prune" : "--no-prune");
1296        if (prune_tags != -1)
1297                argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1298        if (update_head_ok)
1299                argv_array_push(argv, "--update-head-ok");
1300        if (force)
1301                argv_array_push(argv, "--force");
1302        if (keep)
1303                argv_array_push(argv, "--keep");
1304        if (recurse_submodules == RECURSE_SUBMODULES_ON)
1305                argv_array_push(argv, "--recurse-submodules");
1306        else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1307                argv_array_push(argv, "--recurse-submodules=on-demand");
1308        if (tags == TAGS_SET)
1309                argv_array_push(argv, "--tags");
1310        else if (tags == TAGS_UNSET)
1311                argv_array_push(argv, "--no-tags");
1312        if (verbosity >= 2)
1313                argv_array_push(argv, "-v");
1314        if (verbosity >= 1)
1315                argv_array_push(argv, "-v");
1316        else if (verbosity < 0)
1317                argv_array_push(argv, "-q");
1318
1319}
1320
1321static int fetch_multiple(struct string_list *list)
1322{
1323        int i, result = 0;
1324        struct argv_array argv = ARGV_ARRAY_INIT;
1325
1326        if (!append && !dry_run) {
1327                int errcode = truncate_fetch_head();
1328                if (errcode)
1329                        return errcode;
1330        }
1331
1332        argv_array_pushl(&argv, "fetch", "--append", NULL);
1333        add_options_to_argv(&argv);
1334
1335        for (i = 0; i < list->nr; i++) {
1336                const char *name = list->items[i].string;
1337                argv_array_push(&argv, name);
1338                if (verbosity >= 0)
1339                        printf(_("Fetching %s\n"), name);
1340                if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1341                        error(_("Could not fetch %s"), name);
1342                        result = 1;
1343                }
1344                argv_array_pop(&argv);
1345        }
1346
1347        argv_array_clear(&argv);
1348        return result;
1349}
1350
1351/*
1352 * Fetching from the promisor remote should use the given filter-spec
1353 * or inherit the default filter-spec from the config.
1354 */
1355static inline void fetch_one_setup_partial(struct remote *remote)
1356{
1357        /*
1358         * Explicit --no-filter argument overrides everything, regardless
1359         * of any prior partial clones and fetches.
1360         */
1361        if (filter_options.no_filter)
1362                return;
1363
1364        /*
1365         * If no prior partial clone/fetch and the current fetch DID NOT
1366         * request a partial-fetch, do a normal fetch.
1367         */
1368        if (!repository_format_partial_clone && !filter_options.choice)
1369                return;
1370
1371        /*
1372         * If this is the FIRST partial-fetch request, we enable partial
1373         * on this repo and remember the given filter-spec as the default
1374         * for subsequent fetches to this remote.
1375         */
1376        if (!repository_format_partial_clone && filter_options.choice) {
1377                partial_clone_register(remote->name, &filter_options);
1378                return;
1379        }
1380
1381        /*
1382         * We are currently limited to only ONE promisor remote and only
1383         * allow partial-fetches from the promisor remote.
1384         */
1385        if (strcmp(remote->name, repository_format_partial_clone)) {
1386                if (filter_options.choice)
1387                        die(_("--filter can only be used with the remote configured in core.partialClone"));
1388                return;
1389        }
1390
1391        /*
1392         * Do a partial-fetch from the promisor remote using either the
1393         * explicitly given filter-spec or inherit the filter-spec from
1394         * the config.
1395         */
1396        if (!filter_options.choice)
1397                partial_clone_get_default_filter_spec(&filter_options);
1398        return;
1399}
1400
1401static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1402{
1403        struct refspec rs = REFSPEC_INIT_FETCH;
1404        int i;
1405        int exit_code;
1406        int maybe_prune_tags;
1407        int remote_via_config = remote_is_configured(remote, 0);
1408
1409        if (!remote)
1410                die(_("No remote repository specified.  Please, specify either a URL or a\n"
1411                    "remote name from which new revisions should be fetched."));
1412
1413        gtransport = prepare_transport(remote, 1);
1414
1415        if (prune < 0) {
1416                /* no command line request */
1417                if (0 <= remote->prune)
1418                        prune = remote->prune;
1419                else if (0 <= fetch_prune_config)
1420                        prune = fetch_prune_config;
1421                else
1422                        prune = PRUNE_BY_DEFAULT;
1423        }
1424
1425        if (prune_tags < 0) {
1426                /* no command line request */
1427                if (0 <= remote->prune_tags)
1428                        prune_tags = remote->prune_tags;
1429                else if (0 <= fetch_prune_tags_config)
1430                        prune_tags = fetch_prune_tags_config;
1431                else
1432                        prune_tags = PRUNE_TAGS_BY_DEFAULT;
1433        }
1434
1435        maybe_prune_tags = prune_tags_ok && prune_tags;
1436        if (maybe_prune_tags && remote_via_config)
1437                refspec_append(&remote->fetch, TAG_REFSPEC);
1438
1439        if (maybe_prune_tags && (argc || !remote_via_config))
1440                refspec_append(&rs, TAG_REFSPEC);
1441
1442        for (i = 0; i < argc; i++) {
1443                if (!strcmp(argv[i], "tag")) {
1444                        char *tag;
1445                        i++;
1446                        if (i >= argc)
1447                                die(_("You need to specify a tag name."));
1448
1449                        tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1450                                      argv[i], argv[i]);
1451                        refspec_append(&rs, tag);
1452                        free(tag);
1453                } else {
1454                        refspec_append(&rs, argv[i]);
1455                }
1456        }
1457
1458        if (server_options.nr)
1459                gtransport->server_options = &server_options;
1460
1461        sigchain_push_common(unlock_pack_on_signal);
1462        atexit(unlock_pack);
1463        exit_code = do_fetch(gtransport, &rs);
1464        refspec_clear(&rs);
1465        transport_disconnect(gtransport);
1466        gtransport = NULL;
1467        return exit_code;
1468}
1469
1470int cmd_fetch(int argc, const char **argv, const char *prefix)
1471{
1472        int i;
1473        struct string_list list = STRING_LIST_INIT_DUP;
1474        struct remote *remote = NULL;
1475        int result = 0;
1476        int prune_tags_ok = 1;
1477        struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1478
1479        packet_trace_identity("fetch");
1480
1481        fetch_if_missing = 0;
1482
1483        /* Record the command line for the reflog */
1484        strbuf_addstr(&default_rla, "fetch");
1485        for (i = 1; i < argc; i++)
1486                strbuf_addf(&default_rla, " %s", argv[i]);
1487
1488        fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1489        git_config(git_fetch_config, NULL);
1490
1491        argc = parse_options(argc, argv, prefix,
1492                             builtin_fetch_options, builtin_fetch_usage, 0);
1493
1494        if (deepen_relative) {
1495                if (deepen_relative < 0)
1496                        die(_("Negative depth in --deepen is not supported"));
1497                if (depth)
1498                        die(_("--deepen and --depth are mutually exclusive"));
1499                depth = xstrfmt("%d", deepen_relative);
1500        }
1501        if (unshallow) {
1502                if (depth)
1503                        die(_("--depth and --unshallow cannot be used together"));
1504                else if (!is_repository_shallow(the_repository))
1505                        die(_("--unshallow on a complete repository does not make sense"));
1506                else
1507                        depth = xstrfmt("%d", INFINITE_DEPTH);
1508        }
1509
1510        /* no need to be strict, transport_set_option() will validate it again */
1511        if (depth && atoi(depth) < 1)
1512                die(_("depth %s is not a positive number"), depth);
1513        if (depth || deepen_since || deepen_not.nr)
1514                deepen = 1;
1515
1516        if (filter_options.choice && !repository_format_partial_clone)
1517                die("--filter can only be used when extensions.partialClone is set");
1518
1519        if (all) {
1520                if (argc == 1)
1521                        die(_("fetch --all does not take a repository argument"));
1522                else if (argc > 1)
1523                        die(_("fetch --all does not make sense with refspecs"));
1524                (void) for_each_remote(get_one_remote_for_fetch, &list);
1525        } else if (argc == 0) {
1526                /* No arguments -- use default remote */
1527                remote = remote_get(NULL);
1528        } else if (multiple) {
1529                /* All arguments are assumed to be remotes or groups */
1530                for (i = 0; i < argc; i++)
1531                        if (!add_remote_or_group(argv[i], &list))
1532                                die(_("No such remote or remote group: %s"), argv[i]);
1533        } else {
1534                /* Single remote or group */
1535                (void) add_remote_or_group(argv[0], &list);
1536                if (list.nr > 1) {
1537                        /* More than one remote */
1538                        if (argc > 1)
1539                                die(_("Fetching a group and specifying refspecs does not make sense"));
1540                } else {
1541                        /* Zero or one remotes */
1542                        remote = remote_get(argv[0]);
1543                        prune_tags_ok = (argc == 1);
1544                        argc--;
1545                        argv++;
1546                }
1547        }
1548
1549        if (remote) {
1550                if (filter_options.choice || repository_format_partial_clone)
1551                        fetch_one_setup_partial(remote);
1552                result = fetch_one(remote, argc, argv, prune_tags_ok);
1553        } else {
1554                if (filter_options.choice)
1555                        die(_("--filter can only be used with the remote configured in core.partialClone"));
1556                /* TODO should this also die if we have a previous partial-clone? */
1557                result = fetch_multiple(&list);
1558        }
1559
1560        if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1561                struct argv_array options = ARGV_ARRAY_INIT;
1562
1563                add_options_to_argv(&options);
1564                result = fetch_populated_submodules(the_repository,
1565                                                    &options,
1566                                                    submodule_prefix,
1567                                                    recurse_submodules,
1568                                                    recurse_submodules_default,
1569                                                    verbosity < 0,
1570                                                    max_children);
1571                argv_array_clear(&options);
1572        }
1573
1574        string_list_clear(&list, 0);
1575
1576        close_all_packs(the_repository->objects);
1577
1578        argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1579        if (verbosity < 0)
1580                argv_array_push(&argv_gc_auto, "--quiet");
1581        run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1582        argv_array_clear(&argv_gc_auto);
1583
1584        return result;
1585}