Andrew's git / gitweb.git / builtin-remote.c
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builtin-remote.con commit builtin-remote: new show output style for push refspecs (e5dcbfd)
   1#include "cache.h"
   2#include "parse-options.h"
   3#include "transport.h"
   4#include "remote.h"
   5#include "string-list.h"
   6#include "strbuf.h"
   7#include "run-command.h"
   8#include "refs.h"
   9
  10static const char * const builtin_remote_usage[] = {
  11        "git remote [-v | --verbose]",
  12        "git remote add [-t <branch>] [-m <master>] [-f] [--mirror] <name> <url>",
  13        "git remote rename <old> <new>",
  14        "git remote rm <name>",
  15        "git remote set-head <name> [-a | -d | <branch>]",
  16        "git remote show [-n] <name>",
  17        "git remote prune [-n | --dry-run] <name>",
  18        "git remote [-v | --verbose] update [group]",
  19        NULL
  20};
  21
  22#define GET_REF_STATES (1<<0)
  23#define GET_HEAD_NAMES (1<<1)
  24#define GET_PUSH_REF_STATES (1<<2)
  25
  26static int verbose;
  27
  28static int show_all(void);
  29
  30static inline int postfixcmp(const char *string, const char *postfix)
  31{
  32        int len1 = strlen(string), len2 = strlen(postfix);
  33        if (len1 < len2)
  34                return 1;
  35        return strcmp(string + len1 - len2, postfix);
  36}
  37
  38static int opt_parse_track(const struct option *opt, const char *arg, int not)
  39{
  40        struct string_list *list = opt->value;
  41        if (not)
  42                string_list_clear(list, 0);
  43        else
  44                string_list_append(arg, list);
  45        return 0;
  46}
  47
  48static int fetch_remote(const char *name)
  49{
  50        const char *argv[] = { "fetch", name, NULL, NULL };
  51        if (verbose) {
  52                argv[1] = "-v";
  53                argv[2] = name;
  54        }
  55        printf("Updating %s\n", name);
  56        if (run_command_v_opt(argv, RUN_GIT_CMD))
  57                return error("Could not fetch %s", name);
  58        return 0;
  59}
  60
  61static int add(int argc, const char **argv)
  62{
  63        int fetch = 0, mirror = 0;
  64        struct string_list track = { NULL, 0, 0 };
  65        const char *master = NULL;
  66        struct remote *remote;
  67        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
  68        const char *name, *url;
  69        int i;
  70
  71        struct option options[] = {
  72                OPT_GROUP("add specific options"),
  73                OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
  74                OPT_CALLBACK('t', "track", &track, "branch",
  75                        "branch(es) to track", opt_parse_track),
  76                OPT_STRING('m', "master", &master, "branch", "master branch"),
  77                OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
  78                OPT_END()
  79        };
  80
  81        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
  82
  83        if (argc < 2)
  84                usage_with_options(builtin_remote_usage, options);
  85
  86        name = argv[0];
  87        url = argv[1];
  88
  89        remote = remote_get(name);
  90        if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
  91                        remote->fetch_refspec_nr))
  92                die("remote %s already exists.", name);
  93
  94        strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
  95        if (!valid_fetch_refspec(buf2.buf))
  96                die("'%s' is not a valid remote name", name);
  97
  98        strbuf_addf(&buf, "remote.%s.url", name);
  99        if (git_config_set(buf.buf, url))
 100                return 1;
 101
 102        strbuf_reset(&buf);
 103        strbuf_addf(&buf, "remote.%s.fetch", name);
 104
 105        if (track.nr == 0)
 106                string_list_append("*", &track);
 107        for (i = 0; i < track.nr; i++) {
 108                struct string_list_item *item = track.items + i;
 109
 110                strbuf_reset(&buf2);
 111                strbuf_addch(&buf2, '+');
 112                if (mirror)
 113                        strbuf_addf(&buf2, "refs/%s:refs/%s",
 114                                        item->string, item->string);
 115                else
 116                        strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 117                                        item->string, name, item->string);
 118                if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 119                        return 1;
 120        }
 121
 122        if (mirror) {
 123                strbuf_reset(&buf);
 124                strbuf_addf(&buf, "remote.%s.mirror", name);
 125                if (git_config_set(buf.buf, "true"))
 126                        return 1;
 127        }
 128
 129        if (fetch && fetch_remote(name))
 130                return 1;
 131
 132        if (master) {
 133                strbuf_reset(&buf);
 134                strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 135
 136                strbuf_reset(&buf2);
 137                strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 138
 139                if (create_symref(buf.buf, buf2.buf, "remote add"))
 140                        return error("Could not setup master '%s'", master);
 141        }
 142
 143        strbuf_release(&buf);
 144        strbuf_release(&buf2);
 145        string_list_clear(&track, 0);
 146
 147        return 0;
 148}
 149
 150struct branch_info {
 151        char *remote_name;
 152        struct string_list merge;
 153        int rebase;
 154};
 155
 156static struct string_list branch_list;
 157
 158static const char *abbrev_ref(const char *name, const char *prefix)
 159{
 160        const char *abbrev = skip_prefix(name, prefix);
 161        if (abbrev)
 162                return abbrev;
 163        return name;
 164}
 165#define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 166
 167static int config_read_branches(const char *key, const char *value, void *cb)
 168{
 169        if (!prefixcmp(key, "branch.")) {
 170                const char *orig_key = key;
 171                char *name;
 172                struct string_list_item *item;
 173                struct branch_info *info;
 174                enum { REMOTE, MERGE, REBASE } type;
 175
 176                key += 7;
 177                if (!postfixcmp(key, ".remote")) {
 178                        name = xstrndup(key, strlen(key) - 7);
 179                        type = REMOTE;
 180                } else if (!postfixcmp(key, ".merge")) {
 181                        name = xstrndup(key, strlen(key) - 6);
 182                        type = MERGE;
 183                } else if (!postfixcmp(key, ".rebase")) {
 184                        name = xstrndup(key, strlen(key) - 7);
 185                        type = REBASE;
 186                } else
 187                        return 0;
 188
 189                item = string_list_insert(name, &branch_list);
 190
 191                if (!item->util)
 192                        item->util = xcalloc(sizeof(struct branch_info), 1);
 193                info = item->util;
 194                if (type == REMOTE) {
 195                        if (info->remote_name)
 196                                warning("more than one %s", orig_key);
 197                        info->remote_name = xstrdup(value);
 198                } else if (type == MERGE) {
 199                        char *space = strchr(value, ' ');
 200                        value = abbrev_branch(value);
 201                        while (space) {
 202                                char *merge;
 203                                merge = xstrndup(value, space - value);
 204                                string_list_append(merge, &info->merge);
 205                                value = abbrev_branch(space + 1);
 206                                space = strchr(value, ' ');
 207                        }
 208                        string_list_append(xstrdup(value), &info->merge);
 209                } else
 210                        info->rebase = git_config_bool(orig_key, value);
 211        }
 212        return 0;
 213}
 214
 215static void read_branches(void)
 216{
 217        if (branch_list.nr)
 218                return;
 219        git_config(config_read_branches, NULL);
 220}
 221
 222struct ref_states {
 223        struct remote *remote;
 224        struct string_list new, stale, tracked, heads, push;
 225        int queried;
 226};
 227
 228static int handle_one_branch(const char *refname,
 229        const unsigned char *sha1, int flags, void *cb_data)
 230{
 231        struct ref_states *states = cb_data;
 232        struct refspec refspec;
 233
 234        memset(&refspec, 0, sizeof(refspec));
 235        refspec.dst = (char *)refname;
 236        if (!remote_find_tracking(states->remote, &refspec)) {
 237                struct string_list_item *item;
 238                const char *name = abbrev_branch(refspec.src);
 239                /* symbolic refs pointing nowhere were handled already */
 240                if ((flags & REF_ISSYMREF) ||
 241                    string_list_has_string(&states->tracked, name) ||
 242                    string_list_has_string(&states->new, name))
 243                        return 0;
 244                item = string_list_append(name, &states->stale);
 245                item->util = xstrdup(refname);
 246        }
 247        return 0;
 248}
 249
 250static int get_ref_states(const struct ref *remote_refs, struct ref_states *states)
 251{
 252        struct ref *fetch_map = NULL, **tail = &fetch_map;
 253        struct ref *ref;
 254        int i;
 255
 256        for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 257                if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
 258                        die("Could not get fetch map for refspec %s",
 259                                states->remote->fetch_refspec[i]);
 260
 261        states->new.strdup_strings = states->tracked.strdup_strings = 1;
 262        for (ref = fetch_map; ref; ref = ref->next) {
 263                unsigned char sha1[20];
 264                if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 265                        string_list_append(abbrev_branch(ref->name), &states->new);
 266                else
 267                        string_list_append(abbrev_branch(ref->name), &states->tracked);
 268        }
 269        free_refs(fetch_map);
 270
 271        sort_string_list(&states->new);
 272        sort_string_list(&states->tracked);
 273        for_each_ref(handle_one_branch, states);
 274        sort_string_list(&states->stale);
 275
 276        return 0;
 277}
 278
 279struct push_info {
 280        char *dest;
 281        int forced;
 282        enum {
 283                PUSH_STATUS_CREATE = 0,
 284                PUSH_STATUS_DELETE,
 285                PUSH_STATUS_UPTODATE,
 286                PUSH_STATUS_FASTFORWARD,
 287                PUSH_STATUS_OUTOFDATE,
 288                PUSH_STATUS_NOTQUERIED,
 289        } status;
 290};
 291
 292static int get_push_ref_states(const struct ref *remote_refs,
 293        struct ref_states *states)
 294{
 295        struct remote *remote = states->remote;
 296        struct ref *ref, *local_refs, *push_map, **push_tail;
 297        if (remote->mirror)
 298                return 0;
 299
 300        local_refs = get_local_heads();
 301        ref = push_map = copy_ref_list(remote_refs);
 302        while (ref->next)
 303                ref = ref->next;
 304        push_tail = &ref->next;
 305
 306        match_refs(local_refs, push_map, &push_tail, remote->push_refspec_nr,
 307                   remote->push_refspec, MATCH_REFS_NONE);
 308
 309        states->push.strdup_strings = 1;
 310        for (ref = push_map; ref; ref = ref->next) {
 311                struct string_list_item *item;
 312                struct push_info *info;
 313
 314                if (!ref->peer_ref)
 315                        continue;
 316                hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
 317
 318                item = string_list_append(abbrev_branch(ref->peer_ref->name),
 319                                          &states->push);
 320                item->util = xcalloc(sizeof(struct push_info), 1);
 321                info = item->util;
 322                info->forced = ref->force;
 323                info->dest = xstrdup(abbrev_branch(ref->name));
 324
 325                if (is_null_sha1(ref->new_sha1)) {
 326                        info->status = PUSH_STATUS_DELETE;
 327                } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
 328                        info->status = PUSH_STATUS_UPTODATE;
 329                else if (is_null_sha1(ref->old_sha1))
 330                        info->status = PUSH_STATUS_CREATE;
 331                else if (has_sha1_file(ref->old_sha1) &&
 332                         ref_newer(ref->new_sha1, ref->old_sha1))
 333                        info->status = PUSH_STATUS_FASTFORWARD;
 334                else
 335                        info->status = PUSH_STATUS_OUTOFDATE;
 336                // ref->peer_ref = NULL; /* local ref which is freed below */
 337        }
 338        free_refs(local_refs);
 339        free_refs(push_map);
 340        return 0;
 341}
 342
 343static int get_push_ref_states_noquery(struct ref_states *states)
 344{
 345        int i;
 346        struct remote *remote = states->remote;
 347        struct string_list_item *item;
 348        struct push_info *info;
 349
 350        if (remote->mirror)
 351                return 0;
 352
 353        states->push.strdup_strings = 1;
 354        if (!remote->push_refspec_nr) {
 355                item = string_list_append("(matching)", &states->push);
 356                info = item->util = xcalloc(sizeof(struct push_info), 1);
 357                info->status = PUSH_STATUS_NOTQUERIED;
 358                info->dest = xstrdup(item->string);
 359        }
 360        for (i = 0; i < remote->push_refspec_nr; i++) {
 361                struct refspec *spec = remote->push + i;
 362                char buf[PATH_MAX];
 363                if (spec->matching)
 364                        item = string_list_append("(matching)", &states->push);
 365                else if (spec->pattern) {
 366                        snprintf(buf, (sizeof(buf)), "%s*", spec->src);
 367                        item = string_list_append(buf, &states->push);
 368                        snprintf(buf, (sizeof(buf)), "%s*", spec->dst);
 369                } else if (strlen(spec->src))
 370                        item = string_list_append(spec->src, &states->push);
 371                else
 372                        item = string_list_append("(delete)", &states->push);
 373
 374                info = item->util = xcalloc(sizeof(struct push_info), 1);
 375                info->forced = spec->force;
 376                info->status = PUSH_STATUS_NOTQUERIED;
 377                if (spec->pattern)
 378                        info->dest = xstrdup(buf);
 379                else
 380                        info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 381        }
 382        return 0;
 383}
 384
 385static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 386{
 387        struct ref *ref, *matches;
 388        struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 389        struct refspec refspec;
 390
 391        refspec.force = 0;
 392        refspec.pattern = 1;
 393        refspec.src = refspec.dst = "refs/heads/";
 394        states->heads.strdup_strings = 1;
 395        get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 396        matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 397                                    fetch_map, 1);
 398        for(ref = matches; ref; ref = ref->next)
 399                string_list_append(abbrev_branch(ref->name), &states->heads);
 400
 401        free_refs(fetch_map);
 402        free_refs(matches);
 403
 404        return 0;
 405}
 406
 407struct known_remote {
 408        struct known_remote *next;
 409        struct remote *remote;
 410};
 411
 412struct known_remotes {
 413        struct remote *to_delete;
 414        struct known_remote *list;
 415};
 416
 417static int add_known_remote(struct remote *remote, void *cb_data)
 418{
 419        struct known_remotes *all = cb_data;
 420        struct known_remote *r;
 421
 422        if (!strcmp(all->to_delete->name, remote->name))
 423                return 0;
 424
 425        r = xmalloc(sizeof(*r));
 426        r->remote = remote;
 427        r->next = all->list;
 428        all->list = r;
 429        return 0;
 430}
 431
 432struct branches_for_remote {
 433        struct remote *remote;
 434        struct string_list *branches, *skipped;
 435        struct known_remotes *keep;
 436};
 437
 438static int add_branch_for_removal(const char *refname,
 439        const unsigned char *sha1, int flags, void *cb_data)
 440{
 441        struct branches_for_remote *branches = cb_data;
 442        struct refspec refspec;
 443        struct string_list_item *item;
 444        struct known_remote *kr;
 445
 446        memset(&refspec, 0, sizeof(refspec));
 447        refspec.dst = (char *)refname;
 448        if (remote_find_tracking(branches->remote, &refspec))
 449                return 0;
 450
 451        /* don't delete a branch if another remote also uses it */
 452        for (kr = branches->keep->list; kr; kr = kr->next) {
 453                memset(&refspec, 0, sizeof(refspec));
 454                refspec.dst = (char *)refname;
 455                if (!remote_find_tracking(kr->remote, &refspec))
 456                        return 0;
 457        }
 458
 459        /* don't delete non-remote refs */
 460        if (prefixcmp(refname, "refs/remotes")) {
 461                /* advise user how to delete local branches */
 462                if (!prefixcmp(refname, "refs/heads/"))
 463                        string_list_append(abbrev_branch(refname),
 464                                           branches->skipped);
 465                /* silently skip over other non-remote refs */
 466                return 0;
 467        }
 468
 469        /* make sure that symrefs are deleted */
 470        if (flags & REF_ISSYMREF)
 471                return unlink(git_path("%s", refname));
 472
 473        item = string_list_append(refname, branches->branches);
 474        item->util = xmalloc(20);
 475        hashcpy(item->util, sha1);
 476
 477        return 0;
 478}
 479
 480struct rename_info {
 481        const char *old;
 482        const char *new;
 483        struct string_list *remote_branches;
 484};
 485
 486static int read_remote_branches(const char *refname,
 487        const unsigned char *sha1, int flags, void *cb_data)
 488{
 489        struct rename_info *rename = cb_data;
 490        struct strbuf buf = STRBUF_INIT;
 491        struct string_list_item *item;
 492        int flag;
 493        unsigned char orig_sha1[20];
 494        const char *symref;
 495
 496        strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 497        if(!prefixcmp(refname, buf.buf)) {
 498                item = string_list_append(xstrdup(refname), rename->remote_branches);
 499                symref = resolve_ref(refname, orig_sha1, 1, &flag);
 500                if (flag & REF_ISSYMREF)
 501                        item->util = xstrdup(symref);
 502                else
 503                        item->util = NULL;
 504        }
 505
 506        return 0;
 507}
 508
 509static int migrate_file(struct remote *remote)
 510{
 511        struct strbuf buf = STRBUF_INIT;
 512        int i;
 513        char *path = NULL;
 514
 515        strbuf_addf(&buf, "remote.%s.url", remote->name);
 516        for (i = 0; i < remote->url_nr; i++)
 517                if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 518                        return error("Could not append '%s' to '%s'",
 519                                        remote->url[i], buf.buf);
 520        strbuf_reset(&buf);
 521        strbuf_addf(&buf, "remote.%s.push", remote->name);
 522        for (i = 0; i < remote->push_refspec_nr; i++)
 523                if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 524                        return error("Could not append '%s' to '%s'",
 525                                        remote->push_refspec[i], buf.buf);
 526        strbuf_reset(&buf);
 527        strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 528        for (i = 0; i < remote->fetch_refspec_nr; i++)
 529                if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 530                        return error("Could not append '%s' to '%s'",
 531                                        remote->fetch_refspec[i], buf.buf);
 532        if (remote->origin == REMOTE_REMOTES)
 533                path = git_path("remotes/%s", remote->name);
 534        else if (remote->origin == REMOTE_BRANCHES)
 535                path = git_path("branches/%s", remote->name);
 536        if (path && unlink(path))
 537                warning("failed to remove '%s'", path);
 538        return 0;
 539}
 540
 541static int mv(int argc, const char **argv)
 542{
 543        struct option options[] = {
 544                OPT_END()
 545        };
 546        struct remote *oldremote, *newremote;
 547        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 548        struct string_list remote_branches = { NULL, 0, 0, 0 };
 549        struct rename_info rename;
 550        int i;
 551
 552        if (argc != 3)
 553                usage_with_options(builtin_remote_usage, options);
 554
 555        rename.old = argv[1];
 556        rename.new = argv[2];
 557        rename.remote_branches = &remote_branches;
 558
 559        oldremote = remote_get(rename.old);
 560        if (!oldremote)
 561                die("No such remote: %s", rename.old);
 562
 563        if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 564                return migrate_file(oldremote);
 565
 566        newremote = remote_get(rename.new);
 567        if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 568                die("remote %s already exists.", rename.new);
 569
 570        strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 571        if (!valid_fetch_refspec(buf.buf))
 572                die("'%s' is not a valid remote name", rename.new);
 573
 574        strbuf_reset(&buf);
 575        strbuf_addf(&buf, "remote.%s", rename.old);
 576        strbuf_addf(&buf2, "remote.%s", rename.new);
 577        if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 578                return error("Could not rename config section '%s' to '%s'",
 579                                buf.buf, buf2.buf);
 580
 581        strbuf_reset(&buf);
 582        strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 583        if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 584                return error("Could not remove config section '%s'", buf.buf);
 585        for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 586                char *ptr;
 587
 588                strbuf_reset(&buf2);
 589                strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 590                ptr = strstr(buf2.buf, rename.old);
 591                if (ptr)
 592                        strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 593                                        rename.new, strlen(rename.new));
 594                if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 595                        return error("Could not append '%s'", buf.buf);
 596        }
 597
 598        read_branches();
 599        for (i = 0; i < branch_list.nr; i++) {
 600                struct string_list_item *item = branch_list.items + i;
 601                struct branch_info *info = item->util;
 602                if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 603                        strbuf_reset(&buf);
 604                        strbuf_addf(&buf, "branch.%s.remote", item->string);
 605                        if (git_config_set(buf.buf, rename.new)) {
 606                                return error("Could not set '%s'", buf.buf);
 607                        }
 608                }
 609        }
 610
 611        /*
 612         * First remove symrefs, then rename the rest, finally create
 613         * the new symrefs.
 614         */
 615        for_each_ref(read_remote_branches, &rename);
 616        for (i = 0; i < remote_branches.nr; i++) {
 617                struct string_list_item *item = remote_branches.items + i;
 618                int flag = 0;
 619                unsigned char sha1[20];
 620                const char *symref;
 621
 622                symref = resolve_ref(item->string, sha1, 1, &flag);
 623                if (!(flag & REF_ISSYMREF))
 624                        continue;
 625                if (delete_ref(item->string, NULL, REF_NODEREF))
 626                        die("deleting '%s' failed", item->string);
 627        }
 628        for (i = 0; i < remote_branches.nr; i++) {
 629                struct string_list_item *item = remote_branches.items + i;
 630
 631                if (item->util)
 632                        continue;
 633                strbuf_reset(&buf);
 634                strbuf_addstr(&buf, item->string);
 635                strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 636                                rename.new, strlen(rename.new));
 637                strbuf_reset(&buf2);
 638                strbuf_addf(&buf2, "remote: renamed %s to %s",
 639                                item->string, buf.buf);
 640                if (rename_ref(item->string, buf.buf, buf2.buf))
 641                        die("renaming '%s' failed", item->string);
 642        }
 643        for (i = 0; i < remote_branches.nr; i++) {
 644                struct string_list_item *item = remote_branches.items + i;
 645
 646                if (!item->util)
 647                        continue;
 648                strbuf_reset(&buf);
 649                strbuf_addstr(&buf, item->string);
 650                strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 651                                rename.new, strlen(rename.new));
 652                strbuf_reset(&buf2);
 653                strbuf_addstr(&buf2, item->util);
 654                strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 655                                rename.new, strlen(rename.new));
 656                strbuf_reset(&buf3);
 657                strbuf_addf(&buf3, "remote: renamed %s to %s",
 658                                item->string, buf.buf);
 659                if (create_symref(buf.buf, buf2.buf, buf3.buf))
 660                        die("creating '%s' failed", buf.buf);
 661        }
 662        return 0;
 663}
 664
 665static int remove_branches(struct string_list *branches)
 666{
 667        int i, result = 0;
 668        for (i = 0; i < branches->nr; i++) {
 669                struct string_list_item *item = branches->items + i;
 670                const char *refname = item->string;
 671                unsigned char *sha1 = item->util;
 672
 673                if (delete_ref(refname, sha1, 0))
 674                        result |= error("Could not remove branch %s", refname);
 675        }
 676        return result;
 677}
 678
 679static int rm(int argc, const char **argv)
 680{
 681        struct option options[] = {
 682                OPT_END()
 683        };
 684        struct remote *remote;
 685        struct strbuf buf = STRBUF_INIT;
 686        struct known_remotes known_remotes = { NULL, NULL };
 687        struct string_list branches = { NULL, 0, 0, 1 };
 688        struct string_list skipped = { NULL, 0, 0, 1 };
 689        struct branches_for_remote cb_data = {
 690                NULL, &branches, &skipped, &known_remotes
 691        };
 692        int i, result;
 693
 694        if (argc != 2)
 695                usage_with_options(builtin_remote_usage, options);
 696
 697        remote = remote_get(argv[1]);
 698        if (!remote)
 699                die("No such remote: %s", argv[1]);
 700
 701        known_remotes.to_delete = remote;
 702        for_each_remote(add_known_remote, &known_remotes);
 703
 704        strbuf_addf(&buf, "remote.%s", remote->name);
 705        if (git_config_rename_section(buf.buf, NULL) < 1)
 706                return error("Could not remove config section '%s'", buf.buf);
 707
 708        read_branches();
 709        for (i = 0; i < branch_list.nr; i++) {
 710                struct string_list_item *item = branch_list.items + i;
 711                struct branch_info *info = item->util;
 712                if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 713                        const char *keys[] = { "remote", "merge", NULL }, **k;
 714                        for (k = keys; *k; k++) {
 715                                strbuf_reset(&buf);
 716                                strbuf_addf(&buf, "branch.%s.%s",
 717                                                item->string, *k);
 718                                if (git_config_set(buf.buf, NULL)) {
 719                                        strbuf_release(&buf);
 720                                        return -1;
 721                                }
 722                        }
 723                }
 724        }
 725
 726        /*
 727         * We cannot just pass a function to for_each_ref() which deletes
 728         * the branches one by one, since for_each_ref() relies on cached
 729         * refs, which are invalidated when deleting a branch.
 730         */
 731        cb_data.remote = remote;
 732        result = for_each_ref(add_branch_for_removal, &cb_data);
 733        strbuf_release(&buf);
 734
 735        if (!result)
 736                result = remove_branches(&branches);
 737        string_list_clear(&branches, 1);
 738
 739        if (skipped.nr) {
 740                fprintf(stderr, skipped.nr == 1 ?
 741                        "Note: A non-remote branch was not removed; "
 742                        "to delete it, use:\n" :
 743                        "Note: Non-remote branches were not removed; "
 744                        "to delete them, use:\n");
 745                for (i = 0; i < skipped.nr; i++)
 746                        fprintf(stderr, "  git branch -d %s\n",
 747                                skipped.items[i].string);
 748        }
 749        string_list_clear(&skipped, 0);
 750
 751        return result;
 752}
 753
 754void clear_push_info(void *util, const char *string)
 755{
 756        struct push_info *info = util;
 757        free(info->dest);
 758        free(info);
 759}
 760
 761static void free_remote_ref_states(struct ref_states *states)
 762{
 763        string_list_clear(&states->new, 0);
 764        string_list_clear(&states->stale, 0);
 765        string_list_clear(&states->tracked, 0);
 766        string_list_clear(&states->heads, 0);
 767        string_list_clear_func(&states->push, clear_push_info);
 768}
 769
 770static int append_ref_to_tracked_list(const char *refname,
 771        const unsigned char *sha1, int flags, void *cb_data)
 772{
 773        struct ref_states *states = cb_data;
 774        struct refspec refspec;
 775
 776        if (flags & REF_ISSYMREF)
 777                return 0;
 778
 779        memset(&refspec, 0, sizeof(refspec));
 780        refspec.dst = (char *)refname;
 781        if (!remote_find_tracking(states->remote, &refspec))
 782                string_list_append(abbrev_branch(refspec.src), &states->tracked);
 783
 784        return 0;
 785}
 786
 787static int get_remote_ref_states(const char *name,
 788                                 struct ref_states *states,
 789                                 int query)
 790{
 791        struct transport *transport;
 792        const struct ref *remote_refs;
 793
 794        states->remote = remote_get(name);
 795        if (!states->remote)
 796                return error("No such remote: %s", name);
 797
 798        read_branches();
 799
 800        if (query) {
 801                transport = transport_get(NULL, states->remote->url_nr > 0 ?
 802                        states->remote->url[0] : NULL);
 803                remote_refs = transport_get_remote_refs(transport);
 804                transport_disconnect(transport);
 805
 806                states->queried = 1;
 807                if (query & GET_REF_STATES)
 808                        get_ref_states(remote_refs, states);
 809                if (query & GET_HEAD_NAMES)
 810                        get_head_names(remote_refs, states);
 811                if (query & GET_PUSH_REF_STATES)
 812                        get_push_ref_states(remote_refs, states);
 813        } else {
 814                for_each_ref(append_ref_to_tracked_list, states);
 815                sort_string_list(&states->tracked);
 816                get_push_ref_states_noquery(states);
 817        }
 818
 819        return 0;
 820}
 821
 822struct show_info {
 823        struct string_list *list;
 824        struct ref_states *states;
 825        int width, width2;
 826        int any_rebase;
 827};
 828
 829int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 830{
 831        struct show_info *info = cb_data;
 832        int n = strlen(item->string);
 833        if (n > info->width)
 834                info->width = n;
 835        string_list_insert(item->string, info->list);
 836        return 0;
 837}
 838
 839int show_remote_info_item(struct string_list_item *item, void *cb_data)
 840{
 841        struct show_info *info = cb_data;
 842        struct ref_states *states = info->states;
 843        const char *name = item->string;
 844
 845        if (states->queried) {
 846                const char *fmt = "%s";
 847                const char *arg = "";
 848                if (string_list_has_string(&states->new, name)) {
 849                        fmt = " new (next fetch will store in remotes/%s)";
 850                        arg = states->remote->name;
 851                } else if (string_list_has_string(&states->tracked, name))
 852                        arg = " tracked";
 853                else if (string_list_has_string(&states->stale, name))
 854                        arg = " stale (use 'git remote prune' to remove)";
 855                else
 856                        arg = " ???";
 857                printf("    %-*s", info->width, name);
 858                printf(fmt, arg);
 859                printf("\n");
 860        } else
 861                printf("    %s\n", name);
 862
 863        return 0;
 864}
 865
 866int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 867{
 868        struct show_info *show_info = cb_data;
 869        struct ref_states *states = show_info->states;
 870        struct branch_info *branch_info = branch_item->util;
 871        struct string_list_item *item;
 872        int n;
 873
 874        if (!branch_info->merge.nr || !branch_info->remote_name ||
 875            strcmp(states->remote->name, branch_info->remote_name))
 876                return 0;
 877        if ((n = strlen(branch_item->string)) > show_info->width)
 878                show_info->width = n;
 879        if (branch_info->rebase)
 880                show_info->any_rebase = 1;
 881
 882        item = string_list_insert(branch_item->string, show_info->list);
 883        item->util = branch_info;
 884
 885        return 0;
 886}
 887
 888int show_local_info_item(struct string_list_item *item, void *cb_data)
 889{
 890        struct show_info *show_info = cb_data;
 891        struct branch_info *branch_info = item->util;
 892        struct string_list *merge = &branch_info->merge;
 893        const char *also;
 894        int i;
 895
 896        if (branch_info->rebase && branch_info->merge.nr > 1) {
 897                error("invalid branch.%s.merge; cannot rebase onto > 1 branch",
 898                        item->string);
 899                return 0;
 900        }
 901
 902        printf("    %-*s ", show_info->width, item->string);
 903        if (branch_info->rebase) {
 904                printf("rebases onto remote %s\n", merge->items[0].string);
 905                return 0;
 906        } else if (show_info->any_rebase) {
 907                printf(" merges with remote %s\n", merge->items[0].string);
 908                also = "    and with remote";
 909        } else {
 910                printf("merges with remote %s\n", merge->items[0].string);
 911                also = "   and with remote";
 912        }
 913        for (i = 1; i < merge->nr; i++)
 914                printf("    %-*s %s %s\n", show_info->width, "", also,
 915                       merge->items[i].string);
 916
 917        return 0;
 918}
 919
 920int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
 921{
 922        struct show_info *show_info = cb_data;
 923        struct push_info *push_info = push_item->util;
 924        struct string_list_item *item;
 925        int n;
 926        if ((n = strlen(push_item->string)) > show_info->width)
 927                show_info->width = n;
 928        if ((n = strlen(push_info->dest)) > show_info->width2)
 929                show_info->width2 = n;
 930        item = string_list_append(push_item->string, show_info->list);
 931        item->util = push_item->util;
 932        return 0;
 933}
 934
 935int show_push_info_item(struct string_list_item *item, void *cb_data)
 936{
 937        struct show_info *show_info = cb_data;
 938        struct push_info *push_info = item->util;
 939        char *src = item->string, *status = NULL;
 940
 941        switch (push_info->status) {
 942        case PUSH_STATUS_CREATE:
 943                status = "create";
 944                break;
 945        case PUSH_STATUS_DELETE:
 946                status = "delete";
 947                src = "(none)";
 948                break;
 949        case PUSH_STATUS_UPTODATE:
 950                status = "up to date";
 951                break;
 952        case PUSH_STATUS_FASTFORWARD:
 953                status = "fast forwardable";
 954                break;
 955        case PUSH_STATUS_OUTOFDATE:
 956                status = "local out of date";
 957                break;
 958        case PUSH_STATUS_NOTQUERIED:
 959                break;
 960        }
 961        if (status)
 962                printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
 963                        push_info->forced ? "forces" : "pushes",
 964                        show_info->width2, push_info->dest, status);
 965        else
 966                printf("    %-*s %s to %s\n", show_info->width, src,
 967                        push_info->forced ? "forces" : "pushes",
 968                        push_info->dest);
 969        return 0;
 970}
 971
 972static int show(int argc, const char **argv)
 973{
 974        int no_query = 0, result = 0, query_flag = 0;
 975        struct option options[] = {
 976                OPT_GROUP("show specific options"),
 977                OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 978                OPT_END()
 979        };
 980        struct ref_states states;
 981        struct string_list info_list = { NULL, 0, 0, 0 };
 982        struct show_info info;
 983
 984        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 985
 986        if (argc < 1)
 987                return show_all();
 988
 989        if (!no_query)
 990                query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
 991
 992        memset(&states, 0, sizeof(states));
 993        memset(&info, 0, sizeof(info));
 994        info.states = &states;
 995        info.list = &info_list;
 996        for (; argc; argc--, argv++) {
 997                int i;
 998
 999                get_remote_ref_states(*argv, &states, query_flag);
1000
1001                printf("* remote %s\n  URL: %s\n", *argv,
1002                        states.remote->url_nr > 0 ?
1003                                states.remote->url[0] : "(no URL)");
1004                if (no_query)
1005                        printf("  HEAD branch: (not queried)\n");
1006                else if (!states.heads.nr)
1007                        printf("  HEAD branch: (unknown)\n");
1008                else if (states.heads.nr == 1)
1009                        printf("  HEAD branch: %s\n", states.heads.items[0].string);
1010                else {
1011                        printf("  HEAD branch (remote HEAD is ambiguous,"
1012                               " may be one of the following):\n");
1013                        for (i = 0; i < states.heads.nr; i++)
1014                                printf("    %s\n", states.heads.items[i].string);
1015                }
1016
1017                /* remote branch info */
1018                info.width = 0;
1019                for_each_string_list(add_remote_to_show_info, &states.new, &info);
1020                for_each_string_list(add_remote_to_show_info, &states.tracked, &info);
1021                for_each_string_list(add_remote_to_show_info, &states.stale, &info);
1022                if (info.list->nr)
1023                        printf("  Remote branch%s:%s\n",
1024                               info.list->nr > 1 ? "es" : "",
1025                                no_query ? " (status not queried)" : "");
1026                for_each_string_list(show_remote_info_item, info.list, &info);
1027                string_list_clear(info.list, 0);
1028
1029                /* git pull info */
1030                info.width = 0;
1031                info.any_rebase = 0;
1032                for_each_string_list(add_local_to_show_info, &branch_list, &info);
1033                if (info.list->nr)
1034                        printf("  Local branch%s configured for 'git pull':\n",
1035                               info.list->nr > 1 ? "es" : "");
1036                for_each_string_list(show_local_info_item, info.list, &info);
1037                string_list_clear(info.list, 0);
1038
1039                /* git push info */
1040                if (states.remote->mirror)
1041                        printf("  Local refs will be mirrored by 'git push'\n");
1042
1043                info.width = info.width2 = 0;
1044                for_each_string_list(add_push_to_show_info, &states.push, &info);
1045                sort_string_list(info.list);
1046                if (info.list->nr)
1047                        printf("  Local ref%s configured for 'git push'%s:\n",
1048                                info.list->nr > 1 ? "s" : "",
1049                                no_query ? " (status not queried)" : "");
1050                for_each_string_list(show_push_info_item, info.list, &info);
1051                string_list_clear(info.list, 0);
1052
1053                free_remote_ref_states(&states);
1054        }
1055
1056        return result;
1057}
1058
1059static int set_head(int argc, const char **argv)
1060{
1061        int i, opt_a = 0, opt_d = 0, result = 0;
1062        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1063        char *head_name = NULL;
1064
1065        struct option options[] = {
1066                OPT_GROUP("set-head specific options"),
1067                OPT_BOOLEAN('a', "auto", &opt_a,
1068                            "set refs/remotes/<name>/HEAD according to remote"),
1069                OPT_BOOLEAN('d', "delete", &opt_d,
1070                            "delete refs/remotes/<name>/HEAD"),
1071                OPT_END()
1072        };
1073        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1074        if (argc)
1075                strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1076
1077        if (!opt_a && !opt_d && argc == 2) {
1078                head_name = xstrdup(argv[1]);
1079        } else if (opt_a && !opt_d && argc == 1) {
1080                struct ref_states states;
1081                memset(&states, 0, sizeof(states));
1082                get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1083                if (!states.heads.nr)
1084                        result |= error("Cannot determine remote HEAD");
1085                else if (states.heads.nr > 1) {
1086                        result |= error("Multiple remote HEAD branches. "
1087                                        "Please choose one explicitly with:");
1088                        for (i = 0; i < states.heads.nr; i++)
1089                                fprintf(stderr, "  git remote set-head %s %s\n",
1090                                        argv[0], states.heads.items[i].string);
1091                } else
1092                        head_name = xstrdup(states.heads.items[0].string);
1093                free_remote_ref_states(&states);
1094        } else if (opt_d && !opt_a && argc == 1) {
1095                if (delete_ref(buf.buf, NULL, REF_NODEREF))
1096                        result |= error("Could not delete %s", buf.buf);
1097        } else
1098                usage_with_options(builtin_remote_usage, options);
1099
1100        if (head_name) {
1101                unsigned char sha1[20];
1102                strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1103                /* make sure it's valid */
1104                if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1105                        result |= error("Not a valid ref: %s", buf2.buf);
1106                else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1107                        result |= error("Could not setup %s", buf.buf);
1108                if (opt_a)
1109                        printf("%s/HEAD set to %s\n", argv[0], head_name);
1110                free(head_name);
1111        }
1112
1113        strbuf_release(&buf);
1114        strbuf_release(&buf2);
1115        return result;
1116}
1117
1118static int prune(int argc, const char **argv)
1119{
1120        int dry_run = 0, result = 0;
1121        struct option options[] = {
1122                OPT_GROUP("prune specific options"),
1123                OPT__DRY_RUN(&dry_run),
1124                OPT_END()
1125        };
1126        struct ref_states states;
1127        const char *dangling_msg;
1128
1129        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1130
1131        if (argc < 1)
1132                usage_with_options(builtin_remote_usage, options);
1133
1134        dangling_msg = (dry_run
1135                        ? " %s will become dangling!\n"
1136                        : " %s has become dangling!\n");
1137
1138        memset(&states, 0, sizeof(states));
1139        for (; argc; argc--, argv++) {
1140                int i;
1141
1142                get_remote_ref_states(*argv, &states, GET_REF_STATES);
1143
1144                if (states.stale.nr) {
1145                        printf("Pruning %s\n", *argv);
1146                        printf("URL: %s\n",
1147                               states.remote->url_nr
1148                               ? states.remote->url[0]
1149                               : "(no URL)");
1150                }
1151
1152                for (i = 0; i < states.stale.nr; i++) {
1153                        const char *refname = states.stale.items[i].util;
1154
1155                        if (!dry_run)
1156                                result |= delete_ref(refname, NULL, 0);
1157
1158                        printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1159                               abbrev_ref(refname, "refs/remotes/"));
1160                        warn_dangling_symref(dangling_msg, refname);
1161                }
1162
1163                free_remote_ref_states(&states);
1164        }
1165
1166        return result;
1167}
1168
1169static int get_one_remote_for_update(struct remote *remote, void *priv)
1170{
1171        struct string_list *list = priv;
1172        if (!remote->skip_default_update)
1173                string_list_append(remote->name, list);
1174        return 0;
1175}
1176
1177struct remote_group {
1178        const char *name;
1179        struct string_list *list;
1180} remote_group;
1181
1182static int get_remote_group(const char *key, const char *value, void *cb)
1183{
1184        if (!prefixcmp(key, "remotes.") &&
1185                        !strcmp(key + 8, remote_group.name)) {
1186                /* split list by white space */
1187                int space = strcspn(value, " \t\n");
1188                while (*value) {
1189                        if (space > 1)
1190                                string_list_append(xstrndup(value, space),
1191                                                remote_group.list);
1192                        value += space + (value[space] != '\0');
1193                        space = strcspn(value, " \t\n");
1194                }
1195        }
1196
1197        return 0;
1198}
1199
1200static int update(int argc, const char **argv)
1201{
1202        int i, result = 0;
1203        struct string_list list = { NULL, 0, 0, 0 };
1204        static const char *default_argv[] = { NULL, "default", NULL };
1205
1206        if (argc < 2) {
1207                argc = 2;
1208                argv = default_argv;
1209        }
1210
1211        remote_group.list = &list;
1212        for (i = 1; i < argc; i++) {
1213                remote_group.name = argv[i];
1214                result = git_config(get_remote_group, NULL);
1215        }
1216
1217        if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
1218                result = for_each_remote(get_one_remote_for_update, &list);
1219
1220        for (i = 0; i < list.nr; i++)
1221                result |= fetch_remote(list.items[i].string);
1222
1223        /* all names were strdup()ed or strndup()ed */
1224        list.strdup_strings = 1;
1225        string_list_clear(&list, 0);
1226
1227        return result;
1228}
1229
1230static int get_one_entry(struct remote *remote, void *priv)
1231{
1232        struct string_list *list = priv;
1233
1234        if (remote->url_nr > 0) {
1235                int i;
1236
1237                for (i = 0; i < remote->url_nr; i++)
1238                        string_list_append(remote->name, list)->util = (void *)remote->url[i];
1239        } else
1240                string_list_append(remote->name, list)->util = NULL;
1241
1242        return 0;
1243}
1244
1245static int show_all(void)
1246{
1247        struct string_list list = { NULL, 0, 0 };
1248        int result = for_each_remote(get_one_entry, &list);
1249
1250        if (!result) {
1251                int i;
1252
1253                sort_string_list(&list);
1254                for (i = 0; i < list.nr; i++) {
1255                        struct string_list_item *item = list.items + i;
1256                        if (verbose)
1257                                printf("%s\t%s\n", item->string,
1258                                        item->util ? (const char *)item->util : "");
1259                        else {
1260                                if (i && !strcmp((item - 1)->string, item->string))
1261                                        continue;
1262                                printf("%s\n", item->string);
1263                        }
1264                }
1265        }
1266        return result;
1267}
1268
1269int cmd_remote(int argc, const char **argv, const char *prefix)
1270{
1271        struct option options[] = {
1272                OPT__VERBOSE(&verbose),
1273                OPT_END()
1274        };
1275        int result;
1276
1277        argc = parse_options(argc, argv, options, builtin_remote_usage,
1278                PARSE_OPT_STOP_AT_NON_OPTION);
1279
1280        if (argc < 1)
1281                result = show_all();
1282        else if (!strcmp(argv[0], "add"))
1283                result = add(argc, argv);
1284        else if (!strcmp(argv[0], "rename"))
1285                result = mv(argc, argv);
1286        else if (!strcmp(argv[0], "rm"))
1287                result = rm(argc, argv);
1288        else if (!strcmp(argv[0], "set-head"))
1289                result = set_head(argc, argv);
1290        else if (!strcmp(argv[0], "show"))
1291                result = show(argc, argv);
1292        else if (!strcmp(argv[0], "prune"))
1293                result = prune(argc, argv);
1294        else if (!strcmp(argv[0], "update"))
1295                result = update(argc, argv);
1296        else {
1297                error("Unknown subcommand: %s", argv[0]);
1298                usage_with_options(builtin_remote_usage, options);
1299        }
1300
1301        return result ? 1 : 0;
1302}