Andrew's git / gitweb.git / builtin-remote.c
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builtin-remote.con commit match_refs: search ref list tail internally (6d2bf96)
   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 [-p | --prune] [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);
  29static int prune_remote(const char *remote, int dry_run);
  30
  31static inline int postfixcmp(const char *string, const char *postfix)
  32{
  33        int len1 = strlen(string), len2 = strlen(postfix);
  34        if (len1 < len2)
  35                return 1;
  36        return strcmp(string + len1 - len2, postfix);
  37}
  38
  39static int opt_parse_track(const struct option *opt, const char *arg, int not)
  40{
  41        struct string_list *list = opt->value;
  42        if (not)
  43                string_list_clear(list, 0);
  44        else
  45                string_list_append(arg, list);
  46        return 0;
  47}
  48
  49static int fetch_remote(const char *name)
  50{
  51        const char *argv[] = { "fetch", name, NULL, NULL };
  52        if (verbose) {
  53                argv[1] = "-v";
  54                argv[2] = name;
  55        }
  56        printf("Updating %s\n", name);
  57        if (run_command_v_opt(argv, RUN_GIT_CMD))
  58                return error("Could not fetch %s", name);
  59        return 0;
  60}
  61
  62static int add(int argc, const char **argv)
  63{
  64        int fetch = 0, mirror = 0;
  65        struct string_list track = { NULL, 0, 0 };
  66        const char *master = NULL;
  67        struct remote *remote;
  68        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
  69        const char *name, *url;
  70        int i;
  71
  72        struct option options[] = {
  73                OPT_GROUP("add specific options"),
  74                OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
  75                OPT_CALLBACK('t', "track", &track, "branch",
  76                        "branch(es) to track", opt_parse_track),
  77                OPT_STRING('m', "master", &master, "branch", "master branch"),
  78                OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
  79                OPT_END()
  80        };
  81
  82        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
  83
  84        if (argc < 2)
  85                usage_with_options(builtin_remote_usage, options);
  86
  87        name = argv[0];
  88        url = argv[1];
  89
  90        remote = remote_get(name);
  91        if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
  92                        remote->fetch_refspec_nr))
  93                die("remote %s already exists.", name);
  94
  95        strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
  96        if (!valid_fetch_refspec(buf2.buf))
  97                die("'%s' is not a valid remote name", name);
  98
  99        strbuf_addf(&buf, "remote.%s.url", name);
 100        if (git_config_set(buf.buf, url))
 101                return 1;
 102
 103        strbuf_reset(&buf);
 104        strbuf_addf(&buf, "remote.%s.fetch", name);
 105
 106        if (track.nr == 0)
 107                string_list_append("*", &track);
 108        for (i = 0; i < track.nr; i++) {
 109                struct string_list_item *item = track.items + i;
 110
 111                strbuf_reset(&buf2);
 112                strbuf_addch(&buf2, '+');
 113                if (mirror)
 114                        strbuf_addf(&buf2, "refs/%s:refs/%s",
 115                                        item->string, item->string);
 116                else
 117                        strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 118                                        item->string, name, item->string);
 119                if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 120                        return 1;
 121        }
 122
 123        if (mirror) {
 124                strbuf_reset(&buf);
 125                strbuf_addf(&buf, "remote.%s.mirror", name);
 126                if (git_config_set(buf.buf, "true"))
 127                        return 1;
 128        }
 129
 130        if (fetch && fetch_remote(name))
 131                return 1;
 132
 133        if (master) {
 134                strbuf_reset(&buf);
 135                strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 136
 137                strbuf_reset(&buf2);
 138                strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 139
 140                if (create_symref(buf.buf, buf2.buf, "remote add"))
 141                        return error("Could not setup master '%s'", master);
 142        }
 143
 144        strbuf_release(&buf);
 145        strbuf_release(&buf2);
 146        string_list_clear(&track, 0);
 147
 148        return 0;
 149}
 150
 151struct branch_info {
 152        char *remote_name;
 153        struct string_list merge;
 154        int rebase;
 155};
 156
 157static struct string_list branch_list;
 158
 159static const char *abbrev_ref(const char *name, const char *prefix)
 160{
 161        const char *abbrev = skip_prefix(name, prefix);
 162        if (abbrev)
 163                return abbrev;
 164        return name;
 165}
 166#define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 167
 168static int config_read_branches(const char *key, const char *value, void *cb)
 169{
 170        if (!prefixcmp(key, "branch.")) {
 171                const char *orig_key = key;
 172                char *name;
 173                struct string_list_item *item;
 174                struct branch_info *info;
 175                enum { REMOTE, MERGE, REBASE } type;
 176
 177                key += 7;
 178                if (!postfixcmp(key, ".remote")) {
 179                        name = xstrndup(key, strlen(key) - 7);
 180                        type = REMOTE;
 181                } else if (!postfixcmp(key, ".merge")) {
 182                        name = xstrndup(key, strlen(key) - 6);
 183                        type = MERGE;
 184                } else if (!postfixcmp(key, ".rebase")) {
 185                        name = xstrndup(key, strlen(key) - 7);
 186                        type = REBASE;
 187                } else
 188                        return 0;
 189
 190                item = string_list_insert(name, &branch_list);
 191
 192                if (!item->util)
 193                        item->util = xcalloc(sizeof(struct branch_info), 1);
 194                info = item->util;
 195                if (type == REMOTE) {
 196                        if (info->remote_name)
 197                                warning("more than one %s", orig_key);
 198                        info->remote_name = xstrdup(value);
 199                } else if (type == MERGE) {
 200                        char *space = strchr(value, ' ');
 201                        value = abbrev_branch(value);
 202                        while (space) {
 203                                char *merge;
 204                                merge = xstrndup(value, space - value);
 205                                string_list_append(merge, &info->merge);
 206                                value = abbrev_branch(space + 1);
 207                                space = strchr(value, ' ');
 208                        }
 209                        string_list_append(xstrdup(value), &info->merge);
 210                } else
 211                        info->rebase = git_config_bool(orig_key, value);
 212        }
 213        return 0;
 214}
 215
 216static void read_branches(void)
 217{
 218        if (branch_list.nr)
 219                return;
 220        git_config(config_read_branches, NULL);
 221}
 222
 223struct ref_states {
 224        struct remote *remote;
 225        struct string_list new, stale, tracked, heads, push;
 226        int queried;
 227};
 228
 229static int handle_one_branch(const char *refname,
 230        const unsigned char *sha1, int flags, void *cb_data)
 231{
 232        struct ref_states *states = cb_data;
 233        struct refspec refspec;
 234
 235        memset(&refspec, 0, sizeof(refspec));
 236        refspec.dst = (char *)refname;
 237        if (!remote_find_tracking(states->remote, &refspec)) {
 238                struct string_list_item *item;
 239                const char *name = abbrev_branch(refspec.src);
 240                /* symbolic refs pointing nowhere were handled already */
 241                if ((flags & REF_ISSYMREF) ||
 242                    string_list_has_string(&states->tracked, name) ||
 243                    string_list_has_string(&states->new, name))
 244                        return 0;
 245                item = string_list_append(name, &states->stale);
 246                item->util = xstrdup(refname);
 247        }
 248        return 0;
 249}
 250
 251static int get_ref_states(const struct ref *remote_refs, struct ref_states *states)
 252{
 253        struct ref *fetch_map = NULL, **tail = &fetch_map;
 254        struct ref *ref;
 255        int i;
 256
 257        for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 258                if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
 259                        die("Could not get fetch map for refspec %s",
 260                                states->remote->fetch_refspec[i]);
 261
 262        states->new.strdup_strings = states->tracked.strdup_strings = 1;
 263        for (ref = fetch_map; ref; ref = ref->next) {
 264                unsigned char sha1[20];
 265                if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 266                        string_list_append(abbrev_branch(ref->name), &states->new);
 267                else
 268                        string_list_append(abbrev_branch(ref->name), &states->tracked);
 269        }
 270        free_refs(fetch_map);
 271
 272        sort_string_list(&states->new);
 273        sort_string_list(&states->tracked);
 274        for_each_ref(handle_one_branch, states);
 275        sort_string_list(&states->stale);
 276
 277        return 0;
 278}
 279
 280struct push_info {
 281        char *dest;
 282        int forced;
 283        enum {
 284                PUSH_STATUS_CREATE = 0,
 285                PUSH_STATUS_DELETE,
 286                PUSH_STATUS_UPTODATE,
 287                PUSH_STATUS_FASTFORWARD,
 288                PUSH_STATUS_OUTOFDATE,
 289                PUSH_STATUS_NOTQUERIED,
 290        } status;
 291};
 292
 293static int get_push_ref_states(const struct ref *remote_refs,
 294        struct ref_states *states)
 295{
 296        struct remote *remote = states->remote;
 297        struct ref *ref, *local_refs, *push_map;
 298        if (remote->mirror)
 299                return 0;
 300
 301        local_refs = get_local_heads();
 302        push_map = copy_ref_list(remote_refs);
 303
 304        match_refs(local_refs, &push_map, remote->push_refspec_nr,
 305                   remote->push_refspec, MATCH_REFS_NONE);
 306
 307        states->push.strdup_strings = 1;
 308        for (ref = push_map; ref; ref = ref->next) {
 309                struct string_list_item *item;
 310                struct push_info *info;
 311
 312                if (!ref->peer_ref)
 313                        continue;
 314                hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
 315
 316                item = string_list_append(abbrev_branch(ref->peer_ref->name),
 317                                          &states->push);
 318                item->util = xcalloc(sizeof(struct push_info), 1);
 319                info = item->util;
 320                info->forced = ref->force;
 321                info->dest = xstrdup(abbrev_branch(ref->name));
 322
 323                if (is_null_sha1(ref->new_sha1)) {
 324                        info->status = PUSH_STATUS_DELETE;
 325                } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
 326                        info->status = PUSH_STATUS_UPTODATE;
 327                else if (is_null_sha1(ref->old_sha1))
 328                        info->status = PUSH_STATUS_CREATE;
 329                else if (has_sha1_file(ref->old_sha1) &&
 330                         ref_newer(ref->new_sha1, ref->old_sha1))
 331                        info->status = PUSH_STATUS_FASTFORWARD;
 332                else
 333                        info->status = PUSH_STATUS_OUTOFDATE;
 334        }
 335        free_refs(local_refs);
 336        free_refs(push_map);
 337        return 0;
 338}
 339
 340static int get_push_ref_states_noquery(struct ref_states *states)
 341{
 342        int i;
 343        struct remote *remote = states->remote;
 344        struct string_list_item *item;
 345        struct push_info *info;
 346
 347        if (remote->mirror)
 348                return 0;
 349
 350        states->push.strdup_strings = 1;
 351        if (!remote->push_refspec_nr) {
 352                item = string_list_append("(matching)", &states->push);
 353                info = item->util = xcalloc(sizeof(struct push_info), 1);
 354                info->status = PUSH_STATUS_NOTQUERIED;
 355                info->dest = xstrdup(item->string);
 356        }
 357        for (i = 0; i < remote->push_refspec_nr; i++) {
 358                struct refspec *spec = remote->push + i;
 359                if (spec->matching)
 360                        item = string_list_append("(matching)", &states->push);
 361                else if (strlen(spec->src))
 362                        item = string_list_append(spec->src, &states->push);
 363                else
 364                        item = string_list_append("(delete)", &states->push);
 365
 366                info = item->util = xcalloc(sizeof(struct push_info), 1);
 367                info->forced = spec->force;
 368                info->status = PUSH_STATUS_NOTQUERIED;
 369                info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 370        }
 371        return 0;
 372}
 373
 374static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 375{
 376        struct ref *ref, *matches;
 377        struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 378        struct refspec refspec;
 379
 380        refspec.force = 0;
 381        refspec.pattern = 1;
 382        refspec.src = refspec.dst = "refs/heads/*";
 383        states->heads.strdup_strings = 1;
 384        get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 385        matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 386                                    fetch_map, 1);
 387        for(ref = matches; ref; ref = ref->next)
 388                string_list_append(abbrev_branch(ref->name), &states->heads);
 389
 390        free_refs(fetch_map);
 391        free_refs(matches);
 392
 393        return 0;
 394}
 395
 396struct known_remote {
 397        struct known_remote *next;
 398        struct remote *remote;
 399};
 400
 401struct known_remotes {
 402        struct remote *to_delete;
 403        struct known_remote *list;
 404};
 405
 406static int add_known_remote(struct remote *remote, void *cb_data)
 407{
 408        struct known_remotes *all = cb_data;
 409        struct known_remote *r;
 410
 411        if (!strcmp(all->to_delete->name, remote->name))
 412                return 0;
 413
 414        r = xmalloc(sizeof(*r));
 415        r->remote = remote;
 416        r->next = all->list;
 417        all->list = r;
 418        return 0;
 419}
 420
 421struct branches_for_remote {
 422        struct remote *remote;
 423        struct string_list *branches, *skipped;
 424        struct known_remotes *keep;
 425};
 426
 427static int add_branch_for_removal(const char *refname,
 428        const unsigned char *sha1, int flags, void *cb_data)
 429{
 430        struct branches_for_remote *branches = cb_data;
 431        struct refspec refspec;
 432        struct string_list_item *item;
 433        struct known_remote *kr;
 434
 435        memset(&refspec, 0, sizeof(refspec));
 436        refspec.dst = (char *)refname;
 437        if (remote_find_tracking(branches->remote, &refspec))
 438                return 0;
 439
 440        /* don't delete a branch if another remote also uses it */
 441        for (kr = branches->keep->list; kr; kr = kr->next) {
 442                memset(&refspec, 0, sizeof(refspec));
 443                refspec.dst = (char *)refname;
 444                if (!remote_find_tracking(kr->remote, &refspec))
 445                        return 0;
 446        }
 447
 448        /* don't delete non-remote refs */
 449        if (prefixcmp(refname, "refs/remotes")) {
 450                /* advise user how to delete local branches */
 451                if (!prefixcmp(refname, "refs/heads/"))
 452                        string_list_append(abbrev_branch(refname),
 453                                           branches->skipped);
 454                /* silently skip over other non-remote refs */
 455                return 0;
 456        }
 457
 458        /* make sure that symrefs are deleted */
 459        if (flags & REF_ISSYMREF)
 460                return unlink(git_path("%s", refname));
 461
 462        item = string_list_append(refname, branches->branches);
 463        item->util = xmalloc(20);
 464        hashcpy(item->util, sha1);
 465
 466        return 0;
 467}
 468
 469struct rename_info {
 470        const char *old;
 471        const char *new;
 472        struct string_list *remote_branches;
 473};
 474
 475static int read_remote_branches(const char *refname,
 476        const unsigned char *sha1, int flags, void *cb_data)
 477{
 478        struct rename_info *rename = cb_data;
 479        struct strbuf buf = STRBUF_INIT;
 480        struct string_list_item *item;
 481        int flag;
 482        unsigned char orig_sha1[20];
 483        const char *symref;
 484
 485        strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 486        if(!prefixcmp(refname, buf.buf)) {
 487                item = string_list_append(xstrdup(refname), rename->remote_branches);
 488                symref = resolve_ref(refname, orig_sha1, 1, &flag);
 489                if (flag & REF_ISSYMREF)
 490                        item->util = xstrdup(symref);
 491                else
 492                        item->util = NULL;
 493        }
 494
 495        return 0;
 496}
 497
 498static int migrate_file(struct remote *remote)
 499{
 500        struct strbuf buf = STRBUF_INIT;
 501        int i;
 502        char *path = NULL;
 503
 504        strbuf_addf(&buf, "remote.%s.url", remote->name);
 505        for (i = 0; i < remote->url_nr; i++)
 506                if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 507                        return error("Could not append '%s' to '%s'",
 508                                        remote->url[i], buf.buf);
 509        strbuf_reset(&buf);
 510        strbuf_addf(&buf, "remote.%s.push", remote->name);
 511        for (i = 0; i < remote->push_refspec_nr; i++)
 512                if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 513                        return error("Could not append '%s' to '%s'",
 514                                        remote->push_refspec[i], buf.buf);
 515        strbuf_reset(&buf);
 516        strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 517        for (i = 0; i < remote->fetch_refspec_nr; i++)
 518                if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 519                        return error("Could not append '%s' to '%s'",
 520                                        remote->fetch_refspec[i], buf.buf);
 521        if (remote->origin == REMOTE_REMOTES)
 522                path = git_path("remotes/%s", remote->name);
 523        else if (remote->origin == REMOTE_BRANCHES)
 524                path = git_path("branches/%s", remote->name);
 525        if (path)
 526                unlink_or_warn(path);
 527        return 0;
 528}
 529
 530static int mv(int argc, const char **argv)
 531{
 532        struct option options[] = {
 533                OPT_END()
 534        };
 535        struct remote *oldremote, *newremote;
 536        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 537        struct string_list remote_branches = { NULL, 0, 0, 0 };
 538        struct rename_info rename;
 539        int i;
 540
 541        if (argc != 3)
 542                usage_with_options(builtin_remote_usage, options);
 543
 544        rename.old = argv[1];
 545        rename.new = argv[2];
 546        rename.remote_branches = &remote_branches;
 547
 548        oldremote = remote_get(rename.old);
 549        if (!oldremote)
 550                die("No such remote: %s", rename.old);
 551
 552        if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 553                return migrate_file(oldremote);
 554
 555        newremote = remote_get(rename.new);
 556        if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 557                die("remote %s already exists.", rename.new);
 558
 559        strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 560        if (!valid_fetch_refspec(buf.buf))
 561                die("'%s' is not a valid remote name", rename.new);
 562
 563        strbuf_reset(&buf);
 564        strbuf_addf(&buf, "remote.%s", rename.old);
 565        strbuf_addf(&buf2, "remote.%s", rename.new);
 566        if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 567                return error("Could not rename config section '%s' to '%s'",
 568                                buf.buf, buf2.buf);
 569
 570        strbuf_reset(&buf);
 571        strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 572        if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 573                return error("Could not remove config section '%s'", buf.buf);
 574        for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 575                char *ptr;
 576
 577                strbuf_reset(&buf2);
 578                strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 579                ptr = strstr(buf2.buf, rename.old);
 580                if (ptr)
 581                        strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 582                                        rename.new, strlen(rename.new));
 583                if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 584                        return error("Could not append '%s'", buf.buf);
 585        }
 586
 587        read_branches();
 588        for (i = 0; i < branch_list.nr; i++) {
 589                struct string_list_item *item = branch_list.items + i;
 590                struct branch_info *info = item->util;
 591                if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 592                        strbuf_reset(&buf);
 593                        strbuf_addf(&buf, "branch.%s.remote", item->string);
 594                        if (git_config_set(buf.buf, rename.new)) {
 595                                return error("Could not set '%s'", buf.buf);
 596                        }
 597                }
 598        }
 599
 600        /*
 601         * First remove symrefs, then rename the rest, finally create
 602         * the new symrefs.
 603         */
 604        for_each_ref(read_remote_branches, &rename);
 605        for (i = 0; i < remote_branches.nr; i++) {
 606                struct string_list_item *item = remote_branches.items + i;
 607                int flag = 0;
 608                unsigned char sha1[20];
 609
 610                resolve_ref(item->string, sha1, 1, &flag);
 611                if (!(flag & REF_ISSYMREF))
 612                        continue;
 613                if (delete_ref(item->string, NULL, REF_NODEREF))
 614                        die("deleting '%s' failed", item->string);
 615        }
 616        for (i = 0; i < remote_branches.nr; i++) {
 617                struct string_list_item *item = remote_branches.items + i;
 618
 619                if (item->util)
 620                        continue;
 621                strbuf_reset(&buf);
 622                strbuf_addstr(&buf, item->string);
 623                strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 624                                rename.new, strlen(rename.new));
 625                strbuf_reset(&buf2);
 626                strbuf_addf(&buf2, "remote: renamed %s to %s",
 627                                item->string, buf.buf);
 628                if (rename_ref(item->string, buf.buf, buf2.buf))
 629                        die("renaming '%s' failed", item->string);
 630        }
 631        for (i = 0; i < remote_branches.nr; i++) {
 632                struct string_list_item *item = remote_branches.items + i;
 633
 634                if (!item->util)
 635                        continue;
 636                strbuf_reset(&buf);
 637                strbuf_addstr(&buf, item->string);
 638                strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 639                                rename.new, strlen(rename.new));
 640                strbuf_reset(&buf2);
 641                strbuf_addstr(&buf2, item->util);
 642                strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 643                                rename.new, strlen(rename.new));
 644                strbuf_reset(&buf3);
 645                strbuf_addf(&buf3, "remote: renamed %s to %s",
 646                                item->string, buf.buf);
 647                if (create_symref(buf.buf, buf2.buf, buf3.buf))
 648                        die("creating '%s' failed", buf.buf);
 649        }
 650        return 0;
 651}
 652
 653static int remove_branches(struct string_list *branches)
 654{
 655        int i, result = 0;
 656        for (i = 0; i < branches->nr; i++) {
 657                struct string_list_item *item = branches->items + i;
 658                const char *refname = item->string;
 659                unsigned char *sha1 = item->util;
 660
 661                if (delete_ref(refname, sha1, 0))
 662                        result |= error("Could not remove branch %s", refname);
 663        }
 664        return result;
 665}
 666
 667static int rm(int argc, const char **argv)
 668{
 669        struct option options[] = {
 670                OPT_END()
 671        };
 672        struct remote *remote;
 673        struct strbuf buf = STRBUF_INIT;
 674        struct known_remotes known_remotes = { NULL, NULL };
 675        struct string_list branches = { NULL, 0, 0, 1 };
 676        struct string_list skipped = { NULL, 0, 0, 1 };
 677        struct branches_for_remote cb_data = {
 678                NULL, &branches, &skipped, &known_remotes
 679        };
 680        int i, result;
 681
 682        if (argc != 2)
 683                usage_with_options(builtin_remote_usage, options);
 684
 685        remote = remote_get(argv[1]);
 686        if (!remote)
 687                die("No such remote: %s", argv[1]);
 688
 689        known_remotes.to_delete = remote;
 690        for_each_remote(add_known_remote, &known_remotes);
 691
 692        strbuf_addf(&buf, "remote.%s", remote->name);
 693        if (git_config_rename_section(buf.buf, NULL) < 1)
 694                return error("Could not remove config section '%s'", buf.buf);
 695
 696        read_branches();
 697        for (i = 0; i < branch_list.nr; i++) {
 698                struct string_list_item *item = branch_list.items + i;
 699                struct branch_info *info = item->util;
 700                if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 701                        const char *keys[] = { "remote", "merge", NULL }, **k;
 702                        for (k = keys; *k; k++) {
 703                                strbuf_reset(&buf);
 704                                strbuf_addf(&buf, "branch.%s.%s",
 705                                                item->string, *k);
 706                                if (git_config_set(buf.buf, NULL)) {
 707                                        strbuf_release(&buf);
 708                                        return -1;
 709                                }
 710                        }
 711                }
 712        }
 713
 714        /*
 715         * We cannot just pass a function to for_each_ref() which deletes
 716         * the branches one by one, since for_each_ref() relies on cached
 717         * refs, which are invalidated when deleting a branch.
 718         */
 719        cb_data.remote = remote;
 720        result = for_each_ref(add_branch_for_removal, &cb_data);
 721        strbuf_release(&buf);
 722
 723        if (!result)
 724                result = remove_branches(&branches);
 725        string_list_clear(&branches, 1);
 726
 727        if (skipped.nr) {
 728                fprintf(stderr, skipped.nr == 1 ?
 729                        "Note: A non-remote branch was not removed; "
 730                        "to delete it, use:\n" :
 731                        "Note: Non-remote branches were not removed; "
 732                        "to delete them, use:\n");
 733                for (i = 0; i < skipped.nr; i++)
 734                        fprintf(stderr, "  git branch -d %s\n",
 735                                skipped.items[i].string);
 736        }
 737        string_list_clear(&skipped, 0);
 738
 739        return result;
 740}
 741
 742void clear_push_info(void *util, const char *string)
 743{
 744        struct push_info *info = util;
 745        free(info->dest);
 746        free(info);
 747}
 748
 749static void free_remote_ref_states(struct ref_states *states)
 750{
 751        string_list_clear(&states->new, 0);
 752        string_list_clear(&states->stale, 0);
 753        string_list_clear(&states->tracked, 0);
 754        string_list_clear(&states->heads, 0);
 755        string_list_clear_func(&states->push, clear_push_info);
 756}
 757
 758static int append_ref_to_tracked_list(const char *refname,
 759        const unsigned char *sha1, int flags, void *cb_data)
 760{
 761        struct ref_states *states = cb_data;
 762        struct refspec refspec;
 763
 764        if (flags & REF_ISSYMREF)
 765                return 0;
 766
 767        memset(&refspec, 0, sizeof(refspec));
 768        refspec.dst = (char *)refname;
 769        if (!remote_find_tracking(states->remote, &refspec))
 770                string_list_append(abbrev_branch(refspec.src), &states->tracked);
 771
 772        return 0;
 773}
 774
 775static int get_remote_ref_states(const char *name,
 776                                 struct ref_states *states,
 777                                 int query)
 778{
 779        struct transport *transport;
 780        const struct ref *remote_refs;
 781
 782        states->remote = remote_get(name);
 783        if (!states->remote)
 784                return error("No such remote: %s", name);
 785
 786        read_branches();
 787
 788        if (query) {
 789                transport = transport_get(NULL, states->remote->url_nr > 0 ?
 790                        states->remote->url[0] : NULL);
 791                remote_refs = transport_get_remote_refs(transport);
 792                transport_disconnect(transport);
 793
 794                states->queried = 1;
 795                if (query & GET_REF_STATES)
 796                        get_ref_states(remote_refs, states);
 797                if (query & GET_HEAD_NAMES)
 798                        get_head_names(remote_refs, states);
 799                if (query & GET_PUSH_REF_STATES)
 800                        get_push_ref_states(remote_refs, states);
 801        } else {
 802                for_each_ref(append_ref_to_tracked_list, states);
 803                sort_string_list(&states->tracked);
 804                get_push_ref_states_noquery(states);
 805        }
 806
 807        return 0;
 808}
 809
 810struct show_info {
 811        struct string_list *list;
 812        struct ref_states *states;
 813        int width, width2;
 814        int any_rebase;
 815};
 816
 817int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 818{
 819        struct show_info *info = cb_data;
 820        int n = strlen(item->string);
 821        if (n > info->width)
 822                info->width = n;
 823        string_list_insert(item->string, info->list);
 824        return 0;
 825}
 826
 827int show_remote_info_item(struct string_list_item *item, void *cb_data)
 828{
 829        struct show_info *info = cb_data;
 830        struct ref_states *states = info->states;
 831        const char *name = item->string;
 832
 833        if (states->queried) {
 834                const char *fmt = "%s";
 835                const char *arg = "";
 836                if (string_list_has_string(&states->new, name)) {
 837                        fmt = " new (next fetch will store in remotes/%s)";
 838                        arg = states->remote->name;
 839                } else if (string_list_has_string(&states->tracked, name))
 840                        arg = " tracked";
 841                else if (string_list_has_string(&states->stale, name))
 842                        arg = " stale (use 'git remote prune' to remove)";
 843                else
 844                        arg = " ???";
 845                printf("    %-*s", info->width, name);
 846                printf(fmt, arg);
 847                printf("\n");
 848        } else
 849                printf("    %s\n", name);
 850
 851        return 0;
 852}
 853
 854int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 855{
 856        struct show_info *show_info = cb_data;
 857        struct ref_states *states = show_info->states;
 858        struct branch_info *branch_info = branch_item->util;
 859        struct string_list_item *item;
 860        int n;
 861
 862        if (!branch_info->merge.nr || !branch_info->remote_name ||
 863            strcmp(states->remote->name, branch_info->remote_name))
 864                return 0;
 865        if ((n = strlen(branch_item->string)) > show_info->width)
 866                show_info->width = n;
 867        if (branch_info->rebase)
 868                show_info->any_rebase = 1;
 869
 870        item = string_list_insert(branch_item->string, show_info->list);
 871        item->util = branch_info;
 872
 873        return 0;
 874}
 875
 876int show_local_info_item(struct string_list_item *item, void *cb_data)
 877{
 878        struct show_info *show_info = cb_data;
 879        struct branch_info *branch_info = item->util;
 880        struct string_list *merge = &branch_info->merge;
 881        const char *also;
 882        int i;
 883
 884        if (branch_info->rebase && branch_info->merge.nr > 1) {
 885                error("invalid branch.%s.merge; cannot rebase onto > 1 branch",
 886                        item->string);
 887                return 0;
 888        }
 889
 890        printf("    %-*s ", show_info->width, item->string);
 891        if (branch_info->rebase) {
 892                printf("rebases onto remote %s\n", merge->items[0].string);
 893                return 0;
 894        } else if (show_info->any_rebase) {
 895                printf(" merges with remote %s\n", merge->items[0].string);
 896                also = "    and with remote";
 897        } else {
 898                printf("merges with remote %s\n", merge->items[0].string);
 899                also = "   and with remote";
 900        }
 901        for (i = 1; i < merge->nr; i++)
 902                printf("    %-*s %s %s\n", show_info->width, "", also,
 903                       merge->items[i].string);
 904
 905        return 0;
 906}
 907
 908int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
 909{
 910        struct show_info *show_info = cb_data;
 911        struct push_info *push_info = push_item->util;
 912        struct string_list_item *item;
 913        int n;
 914        if ((n = strlen(push_item->string)) > show_info->width)
 915                show_info->width = n;
 916        if ((n = strlen(push_info->dest)) > show_info->width2)
 917                show_info->width2 = n;
 918        item = string_list_append(push_item->string, show_info->list);
 919        item->util = push_item->util;
 920        return 0;
 921}
 922
 923/*
 924 * Sorting comparison for a string list that has push_info
 925 * structs in its util field
 926 */
 927static int cmp_string_with_push(const void *va, const void *vb)
 928{
 929        const struct string_list_item *a = va;
 930        const struct string_list_item *b = vb;
 931        const struct push_info *a_push = a->util;
 932        const struct push_info *b_push = b->util;
 933        int cmp = strcmp(a->string, b->string);
 934        return cmp ? cmp : strcmp(a_push->dest, b_push->dest);
 935}
 936
 937int show_push_info_item(struct string_list_item *item, void *cb_data)
 938{
 939        struct show_info *show_info = cb_data;
 940        struct push_info *push_info = item->util;
 941        char *src = item->string, *status = NULL;
 942
 943        switch (push_info->status) {
 944        case PUSH_STATUS_CREATE:
 945                status = "create";
 946                break;
 947        case PUSH_STATUS_DELETE:
 948                status = "delete";
 949                src = "(none)";
 950                break;
 951        case PUSH_STATUS_UPTODATE:
 952                status = "up to date";
 953                break;
 954        case PUSH_STATUS_FASTFORWARD:
 955                status = "fast forwardable";
 956                break;
 957        case PUSH_STATUS_OUTOFDATE:
 958                status = "local out of date";
 959                break;
 960        case PUSH_STATUS_NOTQUERIED:
 961                break;
 962        }
 963        if (status)
 964                printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
 965                        push_info->forced ? "forces" : "pushes",
 966                        show_info->width2, push_info->dest, status);
 967        else
 968                printf("    %-*s %s to %s\n", show_info->width, src,
 969                        push_info->forced ? "forces" : "pushes",
 970                        push_info->dest);
 971        return 0;
 972}
 973
 974static int show(int argc, const char **argv)
 975{
 976        int no_query = 0, result = 0, query_flag = 0;
 977        struct option options[] = {
 978                OPT_GROUP("show specific options"),
 979                OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 980                OPT_END()
 981        };
 982        struct ref_states states;
 983        struct string_list info_list = { NULL, 0, 0, 0 };
 984        struct show_info info;
 985
 986        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 987
 988        if (argc < 1)
 989                return show_all();
 990
 991        if (!no_query)
 992                query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
 993
 994        memset(&states, 0, sizeof(states));
 995        memset(&info, 0, sizeof(info));
 996        info.states = &states;
 997        info.list = &info_list;
 998        for (; argc; argc--, argv++) {
 999                int i;
1000
1001                get_remote_ref_states(*argv, &states, query_flag);
1002
1003                printf("* remote %s\n  URL: %s\n", *argv,
1004                        states.remote->url_nr > 0 ?
1005                                states.remote->url[0] : "(no URL)");
1006                if (no_query)
1007                        printf("  HEAD branch: (not queried)\n");
1008                else if (!states.heads.nr)
1009                        printf("  HEAD branch: (unknown)\n");
1010                else if (states.heads.nr == 1)
1011                        printf("  HEAD branch: %s\n", states.heads.items[0].string);
1012                else {
1013                        printf("  HEAD branch (remote HEAD is ambiguous,"
1014                               " may be one of the following):\n");
1015                        for (i = 0; i < states.heads.nr; i++)
1016                                printf("    %s\n", states.heads.items[i].string);
1017                }
1018
1019                /* remote branch info */
1020                info.width = 0;
1021                for_each_string_list(add_remote_to_show_info, &states.new, &info);
1022                for_each_string_list(add_remote_to_show_info, &states.tracked, &info);
1023                for_each_string_list(add_remote_to_show_info, &states.stale, &info);
1024                if (info.list->nr)
1025                        printf("  Remote branch%s:%s\n",
1026                               info.list->nr > 1 ? "es" : "",
1027                                no_query ? " (status not queried)" : "");
1028                for_each_string_list(show_remote_info_item, info.list, &info);
1029                string_list_clear(info.list, 0);
1030
1031                /* git pull info */
1032                info.width = 0;
1033                info.any_rebase = 0;
1034                for_each_string_list(add_local_to_show_info, &branch_list, &info);
1035                if (info.list->nr)
1036                        printf("  Local branch%s configured for 'git pull':\n",
1037                               info.list->nr > 1 ? "es" : "");
1038                for_each_string_list(show_local_info_item, info.list, &info);
1039                string_list_clear(info.list, 0);
1040
1041                /* git push info */
1042                if (states.remote->mirror)
1043                        printf("  Local refs will be mirrored by 'git push'\n");
1044
1045                info.width = info.width2 = 0;
1046                for_each_string_list(add_push_to_show_info, &states.push, &info);
1047                qsort(info.list->items, info.list->nr,
1048                        sizeof(*info.list->items), cmp_string_with_push);
1049                if (info.list->nr)
1050                        printf("  Local ref%s configured for 'git push'%s:\n",
1051                                info.list->nr > 1 ? "s" : "",
1052                                no_query ? " (status not queried)" : "");
1053                for_each_string_list(show_push_info_item, info.list, &info);
1054                string_list_clear(info.list, 0);
1055
1056                free_remote_ref_states(&states);
1057        }
1058
1059        return result;
1060}
1061
1062static int set_head(int argc, const char **argv)
1063{
1064        int i, opt_a = 0, opt_d = 0, result = 0;
1065        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1066        char *head_name = NULL;
1067
1068        struct option options[] = {
1069                OPT_GROUP("set-head specific options"),
1070                OPT_BOOLEAN('a', "auto", &opt_a,
1071                            "set refs/remotes/<name>/HEAD according to remote"),
1072                OPT_BOOLEAN('d', "delete", &opt_d,
1073                            "delete refs/remotes/<name>/HEAD"),
1074                OPT_END()
1075        };
1076        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1077        if (argc)
1078                strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1079
1080        if (!opt_a && !opt_d && argc == 2) {
1081                head_name = xstrdup(argv[1]);
1082        } else if (opt_a && !opt_d && argc == 1) {
1083                struct ref_states states;
1084                memset(&states, 0, sizeof(states));
1085                get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1086                if (!states.heads.nr)
1087                        result |= error("Cannot determine remote HEAD");
1088                else if (states.heads.nr > 1) {
1089                        result |= error("Multiple remote HEAD branches. "
1090                                        "Please choose one explicitly with:");
1091                        for (i = 0; i < states.heads.nr; i++)
1092                                fprintf(stderr, "  git remote set-head %s %s\n",
1093                                        argv[0], states.heads.items[i].string);
1094                } else
1095                        head_name = xstrdup(states.heads.items[0].string);
1096                free_remote_ref_states(&states);
1097        } else if (opt_d && !opt_a && argc == 1) {
1098                if (delete_ref(buf.buf, NULL, REF_NODEREF))
1099                        result |= error("Could not delete %s", buf.buf);
1100        } else
1101                usage_with_options(builtin_remote_usage, options);
1102
1103        if (head_name) {
1104                unsigned char sha1[20];
1105                strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1106                /* make sure it's valid */
1107                if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1108                        result |= error("Not a valid ref: %s", buf2.buf);
1109                else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1110                        result |= error("Could not setup %s", buf.buf);
1111                if (opt_a)
1112                        printf("%s/HEAD set to %s\n", argv[0], head_name);
1113                free(head_name);
1114        }
1115
1116        strbuf_release(&buf);
1117        strbuf_release(&buf2);
1118        return result;
1119}
1120
1121static int prune(int argc, const char **argv)
1122{
1123        int dry_run = 0, result = 0;
1124        struct option options[] = {
1125                OPT_GROUP("prune specific options"),
1126                OPT__DRY_RUN(&dry_run),
1127                OPT_END()
1128        };
1129
1130        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1131
1132        if (argc < 1)
1133                usage_with_options(builtin_remote_usage, options);
1134
1135        for (; argc; argc--, argv++)
1136                result |= prune_remote(*argv, dry_run);
1137
1138        return result;
1139}
1140
1141static int prune_remote(const char *remote, int dry_run)
1142{
1143        int result = 0, i;
1144        struct ref_states states;
1145        const char *dangling_msg = dry_run
1146                ? " %s will become dangling!\n"
1147                : " %s has become dangling!\n";
1148
1149        memset(&states, 0, sizeof(states));
1150        get_remote_ref_states(remote, &states, GET_REF_STATES);
1151
1152        if (states.stale.nr) {
1153                printf("Pruning %s\n", remote);
1154                printf("URL: %s\n",
1155                       states.remote->url_nr
1156                       ? states.remote->url[0]
1157                       : "(no URL)");
1158        }
1159
1160        for (i = 0; i < states.stale.nr; i++) {
1161                const char *refname = states.stale.items[i].util;
1162
1163                if (!dry_run)
1164                        result |= delete_ref(refname, NULL, 0);
1165
1166                printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1167                       abbrev_ref(refname, "refs/remotes/"));
1168                warn_dangling_symref(dangling_msg, refname);
1169        }
1170
1171        free_remote_ref_states(&states);
1172        return result;
1173}
1174
1175static int get_one_remote_for_update(struct remote *remote, void *priv)
1176{
1177        struct string_list *list = priv;
1178        if (!remote->skip_default_update)
1179                string_list_append(remote->name, list);
1180        return 0;
1181}
1182
1183struct remote_group {
1184        const char *name;
1185        struct string_list *list;
1186} remote_group;
1187
1188static int get_remote_group(const char *key, const char *value, void *num_hits)
1189{
1190        if (!prefixcmp(key, "remotes.") &&
1191                        !strcmp(key + 8, remote_group.name)) {
1192                /* split list by white space */
1193                int space = strcspn(value, " \t\n");
1194                while (*value) {
1195                        if (space > 1) {
1196                                string_list_append(xstrndup(value, space),
1197                                                remote_group.list);
1198                                ++*((int *)num_hits);
1199                        }
1200                        value += space + (value[space] != '\0');
1201                        space = strcspn(value, " \t\n");
1202                }
1203        }
1204
1205        return 0;
1206}
1207
1208static int update(int argc, const char **argv)
1209{
1210        int i, result = 0, prune = 0;
1211        struct string_list list = { NULL, 0, 0, 0 };
1212        static const char *default_argv[] = { NULL, "default", NULL };
1213        struct option options[] = {
1214                OPT_GROUP("update specific options"),
1215                OPT_BOOLEAN('p', "prune", &prune,
1216                            "prune remotes after fetching"),
1217                OPT_END()
1218        };
1219
1220        argc = parse_options(argc, argv, options, builtin_remote_usage,
1221                             PARSE_OPT_KEEP_ARGV0);
1222        if (argc < 2) {
1223                argc = 2;
1224                argv = default_argv;
1225        }
1226
1227        remote_group.list = &list;
1228        for (i = 1; i < argc; i++) {
1229                int groups_found = 0;
1230                remote_group.name = argv[i];
1231                result = git_config(get_remote_group, &groups_found);
1232                if (!groups_found && (i != 1 || strcmp(argv[1], "default"))) {
1233                        struct remote *remote;
1234                        if (!remote_is_configured(argv[i]))
1235                                die("No such remote or remote group: %s",
1236                                    argv[i]);
1237                        remote = remote_get(argv[i]);
1238                        string_list_append(remote->name, remote_group.list);
1239                }
1240        }
1241
1242        if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
1243                result = for_each_remote(get_one_remote_for_update, &list);
1244
1245        for (i = 0; i < list.nr; i++) {
1246                int err = fetch_remote(list.items[i].string);
1247                result |= err;
1248                if (!err && prune)
1249                        result |= prune_remote(list.items[i].string, 0);
1250        }
1251
1252        /* all names were strdup()ed or strndup()ed */
1253        list.strdup_strings = 1;
1254        string_list_clear(&list, 0);
1255
1256        return result;
1257}
1258
1259static int get_one_entry(struct remote *remote, void *priv)
1260{
1261        struct string_list *list = priv;
1262
1263        if (remote->url_nr > 0) {
1264                int i;
1265
1266                for (i = 0; i < remote->url_nr; i++)
1267                        string_list_append(remote->name, list)->util = (void *)remote->url[i];
1268        } else
1269                string_list_append(remote->name, list)->util = NULL;
1270
1271        return 0;
1272}
1273
1274static int show_all(void)
1275{
1276        struct string_list list = { NULL, 0, 0 };
1277        int result = for_each_remote(get_one_entry, &list);
1278
1279        if (!result) {
1280                int i;
1281
1282                sort_string_list(&list);
1283                for (i = 0; i < list.nr; i++) {
1284                        struct string_list_item *item = list.items + i;
1285                        if (verbose)
1286                                printf("%s\t%s\n", item->string,
1287                                        item->util ? (const char *)item->util : "");
1288                        else {
1289                                if (i && !strcmp((item - 1)->string, item->string))
1290                                        continue;
1291                                printf("%s\n", item->string);
1292                        }
1293                }
1294        }
1295        return result;
1296}
1297
1298int cmd_remote(int argc, const char **argv, const char *prefix)
1299{
1300        struct option options[] = {
1301                OPT__VERBOSE(&verbose),
1302                OPT_END()
1303        };
1304        int result;
1305
1306        argc = parse_options(argc, argv, options, builtin_remote_usage,
1307                PARSE_OPT_STOP_AT_NON_OPTION);
1308
1309        if (argc < 1)
1310                result = show_all();
1311        else if (!strcmp(argv[0], "add"))
1312                result = add(argc, argv);
1313        else if (!strcmp(argv[0], "rename"))
1314                result = mv(argc, argv);
1315        else if (!strcmp(argv[0], "rm"))
1316                result = rm(argc, argv);
1317        else if (!strcmp(argv[0], "set-head"))
1318                result = set_head(argc, argv);
1319        else if (!strcmp(argv[0], "show"))
1320                result = show(argc, argv);
1321        else if (!strcmp(argv[0], "prune"))
1322                result = prune(argc, argv);
1323        else if (!strcmp(argv[0], "update"))
1324                result = update(argc, argv);
1325        else {
1326                error("Unknown subcommand: %s", argv[0]);
1327                usage_with_options(builtin_remote_usage, options);
1328        }
1329
1330        return result ? 1 : 0;
1331}