Andrew's git / gitweb.git / builtin-remote.c
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builtin-remote.con commit Adjust js/remote-improvements and db/refspec-wildcard-in-the-middle (5ad6b02)
   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        }
 337        free_refs(local_refs);
 338        free_refs(push_map);
 339        return 0;
 340}
 341
 342static int get_push_ref_states_noquery(struct ref_states *states)
 343{
 344        int i;
 345        struct remote *remote = states->remote;
 346        struct string_list_item *item;
 347        struct push_info *info;
 348
 349        if (remote->mirror)
 350                return 0;
 351
 352        states->push.strdup_strings = 1;
 353        if (!remote->push_refspec_nr) {
 354                item = string_list_append("(matching)", &states->push);
 355                info = item->util = xcalloc(sizeof(struct push_info), 1);
 356                info->status = PUSH_STATUS_NOTQUERIED;
 357                info->dest = xstrdup(item->string);
 358        }
 359        for (i = 0; i < remote->push_refspec_nr; i++) {
 360                struct refspec *spec = remote->push + i;
 361                if (spec->matching)
 362                        item = string_list_append("(matching)", &states->push);
 363                else if (strlen(spec->src))
 364                        item = string_list_append(spec->src, &states->push);
 365                else
 366                        item = string_list_append("(delete)", &states->push);
 367
 368                info = item->util = xcalloc(sizeof(struct push_info), 1);
 369                info->forced = spec->force;
 370                info->status = PUSH_STATUS_NOTQUERIED;
 371                info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 372        }
 373        return 0;
 374}
 375
 376static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 377{
 378        struct ref *ref, *matches;
 379        struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 380        struct refspec refspec;
 381
 382        refspec.force = 0;
 383        refspec.pattern = 1;
 384        refspec.src = refspec.dst = "refs/heads/*";
 385        states->heads.strdup_strings = 1;
 386        get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 387        matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 388                                    fetch_map, 1);
 389        for(ref = matches; ref; ref = ref->next)
 390                string_list_append(abbrev_branch(ref->name), &states->heads);
 391
 392        free_refs(fetch_map);
 393        free_refs(matches);
 394
 395        return 0;
 396}
 397
 398struct known_remote {
 399        struct known_remote *next;
 400        struct remote *remote;
 401};
 402
 403struct known_remotes {
 404        struct remote *to_delete;
 405        struct known_remote *list;
 406};
 407
 408static int add_known_remote(struct remote *remote, void *cb_data)
 409{
 410        struct known_remotes *all = cb_data;
 411        struct known_remote *r;
 412
 413        if (!strcmp(all->to_delete->name, remote->name))
 414                return 0;
 415
 416        r = xmalloc(sizeof(*r));
 417        r->remote = remote;
 418        r->next = all->list;
 419        all->list = r;
 420        return 0;
 421}
 422
 423struct branches_for_remote {
 424        struct remote *remote;
 425        struct string_list *branches, *skipped;
 426        struct known_remotes *keep;
 427};
 428
 429static int add_branch_for_removal(const char *refname,
 430        const unsigned char *sha1, int flags, void *cb_data)
 431{
 432        struct branches_for_remote *branches = cb_data;
 433        struct refspec refspec;
 434        struct string_list_item *item;
 435        struct known_remote *kr;
 436
 437        memset(&refspec, 0, sizeof(refspec));
 438        refspec.dst = (char *)refname;
 439        if (remote_find_tracking(branches->remote, &refspec))
 440                return 0;
 441
 442        /* don't delete a branch if another remote also uses it */
 443        for (kr = branches->keep->list; kr; kr = kr->next) {
 444                memset(&refspec, 0, sizeof(refspec));
 445                refspec.dst = (char *)refname;
 446                if (!remote_find_tracking(kr->remote, &refspec))
 447                        return 0;
 448        }
 449
 450        /* don't delete non-remote refs */
 451        if (prefixcmp(refname, "refs/remotes")) {
 452                /* advise user how to delete local branches */
 453                if (!prefixcmp(refname, "refs/heads/"))
 454                        string_list_append(abbrev_branch(refname),
 455                                           branches->skipped);
 456                /* silently skip over other non-remote refs */
 457                return 0;
 458        }
 459
 460        /* make sure that symrefs are deleted */
 461        if (flags & REF_ISSYMREF)
 462                return unlink(git_path("%s", refname));
 463
 464        item = string_list_append(refname, branches->branches);
 465        item->util = xmalloc(20);
 466        hashcpy(item->util, sha1);
 467
 468        return 0;
 469}
 470
 471struct rename_info {
 472        const char *old;
 473        const char *new;
 474        struct string_list *remote_branches;
 475};
 476
 477static int read_remote_branches(const char *refname,
 478        const unsigned char *sha1, int flags, void *cb_data)
 479{
 480        struct rename_info *rename = cb_data;
 481        struct strbuf buf = STRBUF_INIT;
 482        struct string_list_item *item;
 483        int flag;
 484        unsigned char orig_sha1[20];
 485        const char *symref;
 486
 487        strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 488        if(!prefixcmp(refname, buf.buf)) {
 489                item = string_list_append(xstrdup(refname), rename->remote_branches);
 490                symref = resolve_ref(refname, orig_sha1, 1, &flag);
 491                if (flag & REF_ISSYMREF)
 492                        item->util = xstrdup(symref);
 493                else
 494                        item->util = NULL;
 495        }
 496
 497        return 0;
 498}
 499
 500static int migrate_file(struct remote *remote)
 501{
 502        struct strbuf buf = STRBUF_INIT;
 503        int i;
 504        char *path = NULL;
 505
 506        strbuf_addf(&buf, "remote.%s.url", remote->name);
 507        for (i = 0; i < remote->url_nr; i++)
 508                if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 509                        return error("Could not append '%s' to '%s'",
 510                                        remote->url[i], buf.buf);
 511        strbuf_reset(&buf);
 512        strbuf_addf(&buf, "remote.%s.push", remote->name);
 513        for (i = 0; i < remote->push_refspec_nr; i++)
 514                if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 515                        return error("Could not append '%s' to '%s'",
 516                                        remote->push_refspec[i], buf.buf);
 517        strbuf_reset(&buf);
 518        strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 519        for (i = 0; i < remote->fetch_refspec_nr; i++)
 520                if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 521                        return error("Could not append '%s' to '%s'",
 522                                        remote->fetch_refspec[i], buf.buf);
 523        if (remote->origin == REMOTE_REMOTES)
 524                path = git_path("remotes/%s", remote->name);
 525        else if (remote->origin == REMOTE_BRANCHES)
 526                path = git_path("branches/%s", remote->name);
 527        if (path && unlink(path))
 528                warning("failed to remove '%s'", path);
 529        return 0;
 530}
 531
 532static int mv(int argc, const char **argv)
 533{
 534        struct option options[] = {
 535                OPT_END()
 536        };
 537        struct remote *oldremote, *newremote;
 538        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 539        struct string_list remote_branches = { NULL, 0, 0, 0 };
 540        struct rename_info rename;
 541        int i;
 542
 543        if (argc != 3)
 544                usage_with_options(builtin_remote_usage, options);
 545
 546        rename.old = argv[1];
 547        rename.new = argv[2];
 548        rename.remote_branches = &remote_branches;
 549
 550        oldremote = remote_get(rename.old);
 551        if (!oldremote)
 552                die("No such remote: %s", rename.old);
 553
 554        if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 555                return migrate_file(oldremote);
 556
 557        newremote = remote_get(rename.new);
 558        if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 559                die("remote %s already exists.", rename.new);
 560
 561        strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 562        if (!valid_fetch_refspec(buf.buf))
 563                die("'%s' is not a valid remote name", rename.new);
 564
 565        strbuf_reset(&buf);
 566        strbuf_addf(&buf, "remote.%s", rename.old);
 567        strbuf_addf(&buf2, "remote.%s", rename.new);
 568        if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 569                return error("Could not rename config section '%s' to '%s'",
 570                                buf.buf, buf2.buf);
 571
 572        strbuf_reset(&buf);
 573        strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 574        if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 575                return error("Could not remove config section '%s'", buf.buf);
 576        for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 577                char *ptr;
 578
 579                strbuf_reset(&buf2);
 580                strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 581                ptr = strstr(buf2.buf, rename.old);
 582                if (ptr)
 583                        strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 584                                        rename.new, strlen(rename.new));
 585                if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 586                        return error("Could not append '%s'", buf.buf);
 587        }
 588
 589        read_branches();
 590        for (i = 0; i < branch_list.nr; i++) {
 591                struct string_list_item *item = branch_list.items + i;
 592                struct branch_info *info = item->util;
 593                if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 594                        strbuf_reset(&buf);
 595                        strbuf_addf(&buf, "branch.%s.remote", item->string);
 596                        if (git_config_set(buf.buf, rename.new)) {
 597                                return error("Could not set '%s'", buf.buf);
 598                        }
 599                }
 600        }
 601
 602        /*
 603         * First remove symrefs, then rename the rest, finally create
 604         * the new symrefs.
 605         */
 606        for_each_ref(read_remote_branches, &rename);
 607        for (i = 0; i < remote_branches.nr; i++) {
 608                struct string_list_item *item = remote_branches.items + i;
 609                int flag = 0;
 610                unsigned char sha1[20];
 611                const char *symref;
 612
 613                symref = resolve_ref(item->string, sha1, 1, &flag);
 614                if (!(flag & REF_ISSYMREF))
 615                        continue;
 616                if (delete_ref(item->string, NULL, REF_NODEREF))
 617                        die("deleting '%s' failed", item->string);
 618        }
 619        for (i = 0; i < remote_branches.nr; i++) {
 620                struct string_list_item *item = remote_branches.items + i;
 621
 622                if (item->util)
 623                        continue;
 624                strbuf_reset(&buf);
 625                strbuf_addstr(&buf, item->string);
 626                strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 627                                rename.new, strlen(rename.new));
 628                strbuf_reset(&buf2);
 629                strbuf_addf(&buf2, "remote: renamed %s to %s",
 630                                item->string, buf.buf);
 631                if (rename_ref(item->string, buf.buf, buf2.buf))
 632                        die("renaming '%s' failed", item->string);
 633        }
 634        for (i = 0; i < remote_branches.nr; i++) {
 635                struct string_list_item *item = remote_branches.items + i;
 636
 637                if (!item->util)
 638                        continue;
 639                strbuf_reset(&buf);
 640                strbuf_addstr(&buf, item->string);
 641                strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 642                                rename.new, strlen(rename.new));
 643                strbuf_reset(&buf2);
 644                strbuf_addstr(&buf2, item->util);
 645                strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 646                                rename.new, strlen(rename.new));
 647                strbuf_reset(&buf3);
 648                strbuf_addf(&buf3, "remote: renamed %s to %s",
 649                                item->string, buf.buf);
 650                if (create_symref(buf.buf, buf2.buf, buf3.buf))
 651                        die("creating '%s' failed", buf.buf);
 652        }
 653        return 0;
 654}
 655
 656static int remove_branches(struct string_list *branches)
 657{
 658        int i, result = 0;
 659        for (i = 0; i < branches->nr; i++) {
 660                struct string_list_item *item = branches->items + i;
 661                const char *refname = item->string;
 662                unsigned char *sha1 = item->util;
 663
 664                if (delete_ref(refname, sha1, 0))
 665                        result |= error("Could not remove branch %s", refname);
 666        }
 667        return result;
 668}
 669
 670static int rm(int argc, const char **argv)
 671{
 672        struct option options[] = {
 673                OPT_END()
 674        };
 675        struct remote *remote;
 676        struct strbuf buf = STRBUF_INIT;
 677        struct known_remotes known_remotes = { NULL, NULL };
 678        struct string_list branches = { NULL, 0, 0, 1 };
 679        struct string_list skipped = { NULL, 0, 0, 1 };
 680        struct branches_for_remote cb_data = {
 681                NULL, &branches, &skipped, &known_remotes
 682        };
 683        int i, result;
 684
 685        if (argc != 2)
 686                usage_with_options(builtin_remote_usage, options);
 687
 688        remote = remote_get(argv[1]);
 689        if (!remote)
 690                die("No such remote: %s", argv[1]);
 691
 692        known_remotes.to_delete = remote;
 693        for_each_remote(add_known_remote, &known_remotes);
 694
 695        strbuf_addf(&buf, "remote.%s", remote->name);
 696        if (git_config_rename_section(buf.buf, NULL) < 1)
 697                return error("Could not remove config section '%s'", buf.buf);
 698
 699        read_branches();
 700        for (i = 0; i < branch_list.nr; i++) {
 701                struct string_list_item *item = branch_list.items + i;
 702                struct branch_info *info = item->util;
 703                if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 704                        const char *keys[] = { "remote", "merge", NULL }, **k;
 705                        for (k = keys; *k; k++) {
 706                                strbuf_reset(&buf);
 707                                strbuf_addf(&buf, "branch.%s.%s",
 708                                                item->string, *k);
 709                                if (git_config_set(buf.buf, NULL)) {
 710                                        strbuf_release(&buf);
 711                                        return -1;
 712                                }
 713                        }
 714                }
 715        }
 716
 717        /*
 718         * We cannot just pass a function to for_each_ref() which deletes
 719         * the branches one by one, since for_each_ref() relies on cached
 720         * refs, which are invalidated when deleting a branch.
 721         */
 722        cb_data.remote = remote;
 723        result = for_each_ref(add_branch_for_removal, &cb_data);
 724        strbuf_release(&buf);
 725
 726        if (!result)
 727                result = remove_branches(&branches);
 728        string_list_clear(&branches, 1);
 729
 730        if (skipped.nr) {
 731                fprintf(stderr, skipped.nr == 1 ?
 732                        "Note: A non-remote branch was not removed; "
 733                        "to delete it, use:\n" :
 734                        "Note: Non-remote branches were not removed; "
 735                        "to delete them, use:\n");
 736                for (i = 0; i < skipped.nr; i++)
 737                        fprintf(stderr, "  git branch -d %s\n",
 738                                skipped.items[i].string);
 739        }
 740        string_list_clear(&skipped, 0);
 741
 742        return result;
 743}
 744
 745void clear_push_info(void *util, const char *string)
 746{
 747        struct push_info *info = util;
 748        free(info->dest);
 749        free(info);
 750}
 751
 752static void free_remote_ref_states(struct ref_states *states)
 753{
 754        string_list_clear(&states->new, 0);
 755        string_list_clear(&states->stale, 0);
 756        string_list_clear(&states->tracked, 0);
 757        string_list_clear(&states->heads, 0);
 758        string_list_clear_func(&states->push, clear_push_info);
 759}
 760
 761static int append_ref_to_tracked_list(const char *refname,
 762        const unsigned char *sha1, int flags, void *cb_data)
 763{
 764        struct ref_states *states = cb_data;
 765        struct refspec refspec;
 766
 767        if (flags & REF_ISSYMREF)
 768                return 0;
 769
 770        memset(&refspec, 0, sizeof(refspec));
 771        refspec.dst = (char *)refname;
 772        if (!remote_find_tracking(states->remote, &refspec))
 773                string_list_append(abbrev_branch(refspec.src), &states->tracked);
 774
 775        return 0;
 776}
 777
 778static int get_remote_ref_states(const char *name,
 779                                 struct ref_states *states,
 780                                 int query)
 781{
 782        struct transport *transport;
 783        const struct ref *remote_refs;
 784
 785        states->remote = remote_get(name);
 786        if (!states->remote)
 787                return error("No such remote: %s", name);
 788
 789        read_branches();
 790
 791        if (query) {
 792                transport = transport_get(NULL, states->remote->url_nr > 0 ?
 793                        states->remote->url[0] : NULL);
 794                remote_refs = transport_get_remote_refs(transport);
 795                transport_disconnect(transport);
 796
 797                states->queried = 1;
 798                if (query & GET_REF_STATES)
 799                        get_ref_states(remote_refs, states);
 800                if (query & GET_HEAD_NAMES)
 801                        get_head_names(remote_refs, states);
 802                if (query & GET_PUSH_REF_STATES)
 803                        get_push_ref_states(remote_refs, states);
 804        } else {
 805                for_each_ref(append_ref_to_tracked_list, states);
 806                sort_string_list(&states->tracked);
 807                get_push_ref_states_noquery(states);
 808        }
 809
 810        return 0;
 811}
 812
 813struct show_info {
 814        struct string_list *list;
 815        struct ref_states *states;
 816        int width, width2;
 817        int any_rebase;
 818};
 819
 820int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 821{
 822        struct show_info *info = cb_data;
 823        int n = strlen(item->string);
 824        if (n > info->width)
 825                info->width = n;
 826        string_list_insert(item->string, info->list);
 827        return 0;
 828}
 829
 830int show_remote_info_item(struct string_list_item *item, void *cb_data)
 831{
 832        struct show_info *info = cb_data;
 833        struct ref_states *states = info->states;
 834        const char *name = item->string;
 835
 836        if (states->queried) {
 837                const char *fmt = "%s";
 838                const char *arg = "";
 839                if (string_list_has_string(&states->new, name)) {
 840                        fmt = " new (next fetch will store in remotes/%s)";
 841                        arg = states->remote->name;
 842                } else if (string_list_has_string(&states->tracked, name))
 843                        arg = " tracked";
 844                else if (string_list_has_string(&states->stale, name))
 845                        arg = " stale (use 'git remote prune' to remove)";
 846                else
 847                        arg = " ???";
 848                printf("    %-*s", info->width, name);
 849                printf(fmt, arg);
 850                printf("\n");
 851        } else
 852                printf("    %s\n", name);
 853
 854        return 0;
 855}
 856
 857int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 858{
 859        struct show_info *show_info = cb_data;
 860        struct ref_states *states = show_info->states;
 861        struct branch_info *branch_info = branch_item->util;
 862        struct string_list_item *item;
 863        int n;
 864
 865        if (!branch_info->merge.nr || !branch_info->remote_name ||
 866            strcmp(states->remote->name, branch_info->remote_name))
 867                return 0;
 868        if ((n = strlen(branch_item->string)) > show_info->width)
 869                show_info->width = n;
 870        if (branch_info->rebase)
 871                show_info->any_rebase = 1;
 872
 873        item = string_list_insert(branch_item->string, show_info->list);
 874        item->util = branch_info;
 875
 876        return 0;
 877}
 878
 879int show_local_info_item(struct string_list_item *item, void *cb_data)
 880{
 881        struct show_info *show_info = cb_data;
 882        struct branch_info *branch_info = item->util;
 883        struct string_list *merge = &branch_info->merge;
 884        const char *also;
 885        int i;
 886
 887        if (branch_info->rebase && branch_info->merge.nr > 1) {
 888                error("invalid branch.%s.merge; cannot rebase onto > 1 branch",
 889                        item->string);
 890                return 0;
 891        }
 892
 893        printf("    %-*s ", show_info->width, item->string);
 894        if (branch_info->rebase) {
 895                printf("rebases onto remote %s\n", merge->items[0].string);
 896                return 0;
 897        } else if (show_info->any_rebase) {
 898                printf(" merges with remote %s\n", merge->items[0].string);
 899                also = "    and with remote";
 900        } else {
 901                printf("merges with remote %s\n", merge->items[0].string);
 902                also = "   and with remote";
 903        }
 904        for (i = 1; i < merge->nr; i++)
 905                printf("    %-*s %s %s\n", show_info->width, "", also,
 906                       merge->items[i].string);
 907
 908        return 0;
 909}
 910
 911int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
 912{
 913        struct show_info *show_info = cb_data;
 914        struct push_info *push_info = push_item->util;
 915        struct string_list_item *item;
 916        int n;
 917        if ((n = strlen(push_item->string)) > show_info->width)
 918                show_info->width = n;
 919        if ((n = strlen(push_info->dest)) > show_info->width2)
 920                show_info->width2 = n;
 921        item = string_list_append(push_item->string, show_info->list);
 922        item->util = push_item->util;
 923        return 0;
 924}
 925
 926int show_push_info_item(struct string_list_item *item, void *cb_data)
 927{
 928        struct show_info *show_info = cb_data;
 929        struct push_info *push_info = item->util;
 930        char *src = item->string, *status = NULL;
 931
 932        switch (push_info->status) {
 933        case PUSH_STATUS_CREATE:
 934                status = "create";
 935                break;
 936        case PUSH_STATUS_DELETE:
 937                status = "delete";
 938                src = "(none)";
 939                break;
 940        case PUSH_STATUS_UPTODATE:
 941                status = "up to date";
 942                break;
 943        case PUSH_STATUS_FASTFORWARD:
 944                status = "fast forwardable";
 945                break;
 946        case PUSH_STATUS_OUTOFDATE:
 947                status = "local out of date";
 948                break;
 949        case PUSH_STATUS_NOTQUERIED:
 950                break;
 951        }
 952        if (status)
 953                printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
 954                        push_info->forced ? "forces" : "pushes",
 955                        show_info->width2, push_info->dest, status);
 956        else
 957                printf("    %-*s %s to %s\n", show_info->width, src,
 958                        push_info->forced ? "forces" : "pushes",
 959                        push_info->dest);
 960        return 0;
 961}
 962
 963static int show(int argc, const char **argv)
 964{
 965        int no_query = 0, result = 0, query_flag = 0;
 966        struct option options[] = {
 967                OPT_GROUP("show specific options"),
 968                OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 969                OPT_END()
 970        };
 971        struct ref_states states;
 972        struct string_list info_list = { NULL, 0, 0, 0 };
 973        struct show_info info;
 974
 975        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 976
 977        if (argc < 1)
 978                return show_all();
 979
 980        if (!no_query)
 981                query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
 982
 983        memset(&states, 0, sizeof(states));
 984        memset(&info, 0, sizeof(info));
 985        info.states = &states;
 986        info.list = &info_list;
 987        for (; argc; argc--, argv++) {
 988                int i;
 989
 990                get_remote_ref_states(*argv, &states, query_flag);
 991
 992                printf("* remote %s\n  URL: %s\n", *argv,
 993                        states.remote->url_nr > 0 ?
 994                                states.remote->url[0] : "(no URL)");
 995                if (no_query)
 996                        printf("  HEAD branch: (not queried)\n");
 997                else if (!states.heads.nr)
 998                        printf("  HEAD branch: (unknown)\n");
 999                else if (states.heads.nr == 1)
1000                        printf("  HEAD branch: %s\n", states.heads.items[0].string);
1001                else {
1002                        printf("  HEAD branch (remote HEAD is ambiguous,"
1003                               " may be one of the following):\n");
1004                        for (i = 0; i < states.heads.nr; i++)
1005                                printf("    %s\n", states.heads.items[i].string);
1006                }
1007
1008                /* remote branch info */
1009                info.width = 0;
1010                for_each_string_list(add_remote_to_show_info, &states.new, &info);
1011                for_each_string_list(add_remote_to_show_info, &states.tracked, &info);
1012                for_each_string_list(add_remote_to_show_info, &states.stale, &info);
1013                if (info.list->nr)
1014                        printf("  Remote branch%s:%s\n",
1015                               info.list->nr > 1 ? "es" : "",
1016                                no_query ? " (status not queried)" : "");
1017                for_each_string_list(show_remote_info_item, info.list, &info);
1018                string_list_clear(info.list, 0);
1019
1020                /* git pull info */
1021                info.width = 0;
1022                info.any_rebase = 0;
1023                for_each_string_list(add_local_to_show_info, &branch_list, &info);
1024                if (info.list->nr)
1025                        printf("  Local branch%s configured for 'git pull':\n",
1026                               info.list->nr > 1 ? "es" : "");
1027                for_each_string_list(show_local_info_item, info.list, &info);
1028                string_list_clear(info.list, 0);
1029
1030                /* git push info */
1031                if (states.remote->mirror)
1032                        printf("  Local refs will be mirrored by 'git push'\n");
1033
1034                info.width = info.width2 = 0;
1035                for_each_string_list(add_push_to_show_info, &states.push, &info);
1036                sort_string_list(info.list);
1037                if (info.list->nr)
1038                        printf("  Local ref%s configured for 'git push'%s:\n",
1039                                info.list->nr > 1 ? "s" : "",
1040                                no_query ? " (status not queried)" : "");
1041                for_each_string_list(show_push_info_item, info.list, &info);
1042                string_list_clear(info.list, 0);
1043
1044                free_remote_ref_states(&states);
1045        }
1046
1047        return result;
1048}
1049
1050static int set_head(int argc, const char **argv)
1051{
1052        int i, opt_a = 0, opt_d = 0, result = 0;
1053        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1054        char *head_name = NULL;
1055
1056        struct option options[] = {
1057                OPT_GROUP("set-head specific options"),
1058                OPT_BOOLEAN('a', "auto", &opt_a,
1059                            "set refs/remotes/<name>/HEAD according to remote"),
1060                OPT_BOOLEAN('d', "delete", &opt_d,
1061                            "delete refs/remotes/<name>/HEAD"),
1062                OPT_END()
1063        };
1064        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1065        if (argc)
1066                strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1067
1068        if (!opt_a && !opt_d && argc == 2) {
1069                head_name = xstrdup(argv[1]);
1070        } else if (opt_a && !opt_d && argc == 1) {
1071                struct ref_states states;
1072                memset(&states, 0, sizeof(states));
1073                get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1074                if (!states.heads.nr)
1075                        result |= error("Cannot determine remote HEAD");
1076                else if (states.heads.nr > 1) {
1077                        result |= error("Multiple remote HEAD branches. "
1078                                        "Please choose one explicitly with:");
1079                        for (i = 0; i < states.heads.nr; i++)
1080                                fprintf(stderr, "  git remote set-head %s %s\n",
1081                                        argv[0], states.heads.items[i].string);
1082                } else
1083                        head_name = xstrdup(states.heads.items[0].string);
1084                free_remote_ref_states(&states);
1085        } else if (opt_d && !opt_a && argc == 1) {
1086                if (delete_ref(buf.buf, NULL, REF_NODEREF))
1087                        result |= error("Could not delete %s", buf.buf);
1088        } else
1089                usage_with_options(builtin_remote_usage, options);
1090
1091        if (head_name) {
1092                unsigned char sha1[20];
1093                strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1094                /* make sure it's valid */
1095                if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1096                        result |= error("Not a valid ref: %s", buf2.buf);
1097                else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1098                        result |= error("Could not setup %s", buf.buf);
1099                if (opt_a)
1100                        printf("%s/HEAD set to %s\n", argv[0], head_name);
1101                free(head_name);
1102        }
1103
1104        strbuf_release(&buf);
1105        strbuf_release(&buf2);
1106        return result;
1107}
1108
1109static int prune(int argc, const char **argv)
1110{
1111        int dry_run = 0, result = 0;
1112        struct option options[] = {
1113                OPT_GROUP("prune specific options"),
1114                OPT__DRY_RUN(&dry_run),
1115                OPT_END()
1116        };
1117        struct ref_states states;
1118        const char *dangling_msg;
1119
1120        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1121
1122        if (argc < 1)
1123                usage_with_options(builtin_remote_usage, options);
1124
1125        dangling_msg = (dry_run
1126                        ? " %s will become dangling!\n"
1127                        : " %s has become dangling!\n");
1128
1129        memset(&states, 0, sizeof(states));
1130        for (; argc; argc--, argv++) {
1131                int i;
1132
1133                get_remote_ref_states(*argv, &states, GET_REF_STATES);
1134
1135                if (states.stale.nr) {
1136                        printf("Pruning %s\n", *argv);
1137                        printf("URL: %s\n",
1138                               states.remote->url_nr
1139                               ? states.remote->url[0]
1140                               : "(no URL)");
1141                }
1142
1143                for (i = 0; i < states.stale.nr; i++) {
1144                        const char *refname = states.stale.items[i].util;
1145
1146                        if (!dry_run)
1147                                result |= delete_ref(refname, NULL, 0);
1148
1149                        printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1150                               abbrev_ref(refname, "refs/remotes/"));
1151                        warn_dangling_symref(dangling_msg, refname);
1152                }
1153
1154                free_remote_ref_states(&states);
1155        }
1156
1157        return result;
1158}
1159
1160static int get_one_remote_for_update(struct remote *remote, void *priv)
1161{
1162        struct string_list *list = priv;
1163        if (!remote->skip_default_update)
1164                string_list_append(remote->name, list);
1165        return 0;
1166}
1167
1168struct remote_group {
1169        const char *name;
1170        struct string_list *list;
1171} remote_group;
1172
1173static int get_remote_group(const char *key, const char *value, void *cb)
1174{
1175        if (!prefixcmp(key, "remotes.") &&
1176                        !strcmp(key + 8, remote_group.name)) {
1177                /* split list by white space */
1178                int space = strcspn(value, " \t\n");
1179                while (*value) {
1180                        if (space > 1)
1181                                string_list_append(xstrndup(value, space),
1182                                                remote_group.list);
1183                        value += space + (value[space] != '\0');
1184                        space = strcspn(value, " \t\n");
1185                }
1186        }
1187
1188        return 0;
1189}
1190
1191static int update(int argc, const char **argv)
1192{
1193        int i, result = 0;
1194        struct string_list list = { NULL, 0, 0, 0 };
1195        static const char *default_argv[] = { NULL, "default", NULL };
1196
1197        if (argc < 2) {
1198                argc = 2;
1199                argv = default_argv;
1200        }
1201
1202        remote_group.list = &list;
1203        for (i = 1; i < argc; i++) {
1204                remote_group.name = argv[i];
1205                result = git_config(get_remote_group, NULL);
1206        }
1207
1208        if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
1209                result = for_each_remote(get_one_remote_for_update, &list);
1210
1211        for (i = 0; i < list.nr; i++)
1212                result |= fetch_remote(list.items[i].string);
1213
1214        /* all names were strdup()ed or strndup()ed */
1215        list.strdup_strings = 1;
1216        string_list_clear(&list, 0);
1217
1218        return result;
1219}
1220
1221static int get_one_entry(struct remote *remote, void *priv)
1222{
1223        struct string_list *list = priv;
1224
1225        if (remote->url_nr > 0) {
1226                int i;
1227
1228                for (i = 0; i < remote->url_nr; i++)
1229                        string_list_append(remote->name, list)->util = (void *)remote->url[i];
1230        } else
1231                string_list_append(remote->name, list)->util = NULL;
1232
1233        return 0;
1234}
1235
1236static int show_all(void)
1237{
1238        struct string_list list = { NULL, 0, 0 };
1239        int result = for_each_remote(get_one_entry, &list);
1240
1241        if (!result) {
1242                int i;
1243
1244                sort_string_list(&list);
1245                for (i = 0; i < list.nr; i++) {
1246                        struct string_list_item *item = list.items + i;
1247                        if (verbose)
1248                                printf("%s\t%s\n", item->string,
1249                                        item->util ? (const char *)item->util : "");
1250                        else {
1251                                if (i && !strcmp((item - 1)->string, item->string))
1252                                        continue;
1253                                printf("%s\n", item->string);
1254                        }
1255                }
1256        }
1257        return result;
1258}
1259
1260int cmd_remote(int argc, const char **argv, const char *prefix)
1261{
1262        struct option options[] = {
1263                OPT__VERBOSE(&verbose),
1264                OPT_END()
1265        };
1266        int result;
1267
1268        argc = parse_options(argc, argv, options, builtin_remote_usage,
1269                PARSE_OPT_STOP_AT_NON_OPTION);
1270
1271        if (argc < 1)
1272                result = show_all();
1273        else if (!strcmp(argv[0], "add"))
1274                result = add(argc, argv);
1275        else if (!strcmp(argv[0], "rename"))
1276                result = mv(argc, argv);
1277        else if (!strcmp(argv[0], "rm"))
1278                result = rm(argc, argv);
1279        else if (!strcmp(argv[0], "set-head"))
1280                result = set_head(argc, argv);
1281        else if (!strcmp(argv[0], "show"))
1282                result = show(argc, argv);
1283        else if (!strcmp(argv[0], "prune"))
1284                result = prune(argc, argv);
1285        else if (!strcmp(argv[0], "update"))
1286                result = update(argc, argv);
1287        else {
1288                error("Unknown subcommand: %s", argv[0]);
1289                usage_with_options(builtin_remote_usage, options);
1290        }
1291
1292        return result ? 1 : 0;
1293}