Andrew's git / gitweb.git / builtin-remote.c
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builtin-remote.con commit for-each-ref: Do not lookup objects when they will not be used (b7dd2d2)
   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, **push_tail;
 298        if (remote->mirror)
 299                return 0;
 300
 301        local_refs = get_local_heads();
 302        ref = push_map = copy_ref_list(remote_refs);
 303        while (ref->next)
 304                ref = ref->next;
 305        push_tail = &ref->next;
 306
 307        match_refs(local_refs, push_map, &push_tail, remote->push_refspec_nr,
 308                   remote->push_refspec, MATCH_REFS_NONE);
 309
 310        states->push.strdup_strings = 1;
 311        for (ref = push_map; ref; ref = ref->next) {
 312                struct string_list_item *item;
 313                struct push_info *info;
 314
 315                if (!ref->peer_ref)
 316                        continue;
 317                hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
 318
 319                item = string_list_append(abbrev_branch(ref->peer_ref->name),
 320                                          &states->push);
 321                item->util = xcalloc(sizeof(struct push_info), 1);
 322                info = item->util;
 323                info->forced = ref->force;
 324                info->dest = xstrdup(abbrev_branch(ref->name));
 325
 326                if (is_null_sha1(ref->new_sha1)) {
 327                        info->status = PUSH_STATUS_DELETE;
 328                } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
 329                        info->status = PUSH_STATUS_UPTODATE;
 330                else if (is_null_sha1(ref->old_sha1))
 331                        info->status = PUSH_STATUS_CREATE;
 332                else if (has_sha1_file(ref->old_sha1) &&
 333                         ref_newer(ref->new_sha1, ref->old_sha1))
 334                        info->status = PUSH_STATUS_FASTFORWARD;
 335                else
 336                        info->status = PUSH_STATUS_OUTOFDATE;
 337        }
 338        free_refs(local_refs);
 339        free_refs(push_map);
 340        return 0;
 341}
 342
 343static int get_push_ref_states_noquery(struct ref_states *states)
 344{
 345        int i;
 346        struct remote *remote = states->remote;
 347        struct string_list_item *item;
 348        struct push_info *info;
 349
 350        if (remote->mirror)
 351                return 0;
 352
 353        states->push.strdup_strings = 1;
 354        if (!remote->push_refspec_nr) {
 355                item = string_list_append("(matching)", &states->push);
 356                info = item->util = xcalloc(sizeof(struct push_info), 1);
 357                info->status = PUSH_STATUS_NOTQUERIED;
 358                info->dest = xstrdup(item->string);
 359        }
 360        for (i = 0; i < remote->push_refspec_nr; i++) {
 361                struct refspec *spec = remote->push + i;
 362                if (spec->matching)
 363                        item = string_list_append("(matching)", &states->push);
 364                else if (strlen(spec->src))
 365                        item = string_list_append(spec->src, &states->push);
 366                else
 367                        item = string_list_append("(delete)", &states->push);
 368
 369                info = item->util = xcalloc(sizeof(struct push_info), 1);
 370                info->forced = spec->force;
 371                info->status = PUSH_STATUS_NOTQUERIED;
 372                info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 373        }
 374        return 0;
 375}
 376
 377static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 378{
 379        struct ref *ref, *matches;
 380        struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 381        struct refspec refspec;
 382
 383        refspec.force = 0;
 384        refspec.pattern = 1;
 385        refspec.src = refspec.dst = "refs/heads/*";
 386        states->heads.strdup_strings = 1;
 387        get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 388        matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 389                                    fetch_map, 1);
 390        for(ref = matches; ref; ref = ref->next)
 391                string_list_append(abbrev_branch(ref->name), &states->heads);
 392
 393        free_refs(fetch_map);
 394        free_refs(matches);
 395
 396        return 0;
 397}
 398
 399struct known_remote {
 400        struct known_remote *next;
 401        struct remote *remote;
 402};
 403
 404struct known_remotes {
 405        struct remote *to_delete;
 406        struct known_remote *list;
 407};
 408
 409static int add_known_remote(struct remote *remote, void *cb_data)
 410{
 411        struct known_remotes *all = cb_data;
 412        struct known_remote *r;
 413
 414        if (!strcmp(all->to_delete->name, remote->name))
 415                return 0;
 416
 417        r = xmalloc(sizeof(*r));
 418        r->remote = remote;
 419        r->next = all->list;
 420        all->list = r;
 421        return 0;
 422}
 423
 424struct branches_for_remote {
 425        struct remote *remote;
 426        struct string_list *branches, *skipped;
 427        struct known_remotes *keep;
 428};
 429
 430static int add_branch_for_removal(const char *refname,
 431        const unsigned char *sha1, int flags, void *cb_data)
 432{
 433        struct branches_for_remote *branches = cb_data;
 434        struct refspec refspec;
 435        struct string_list_item *item;
 436        struct known_remote *kr;
 437
 438        memset(&refspec, 0, sizeof(refspec));
 439        refspec.dst = (char *)refname;
 440        if (remote_find_tracking(branches->remote, &refspec))
 441                return 0;
 442
 443        /* don't delete a branch if another remote also uses it */
 444        for (kr = branches->keep->list; kr; kr = kr->next) {
 445                memset(&refspec, 0, sizeof(refspec));
 446                refspec.dst = (char *)refname;
 447                if (!remote_find_tracking(kr->remote, &refspec))
 448                        return 0;
 449        }
 450
 451        /* don't delete non-remote refs */
 452        if (prefixcmp(refname, "refs/remotes")) {
 453                /* advise user how to delete local branches */
 454                if (!prefixcmp(refname, "refs/heads/"))
 455                        string_list_append(abbrev_branch(refname),
 456                                           branches->skipped);
 457                /* silently skip over other non-remote refs */
 458                return 0;
 459        }
 460
 461        /* make sure that symrefs are deleted */
 462        if (flags & REF_ISSYMREF)
 463                return unlink(git_path("%s", refname));
 464
 465        item = string_list_append(refname, branches->branches);
 466        item->util = xmalloc(20);
 467        hashcpy(item->util, sha1);
 468
 469        return 0;
 470}
 471
 472struct rename_info {
 473        const char *old;
 474        const char *new;
 475        struct string_list *remote_branches;
 476};
 477
 478static int read_remote_branches(const char *refname,
 479        const unsigned char *sha1, int flags, void *cb_data)
 480{
 481        struct rename_info *rename = cb_data;
 482        struct strbuf buf = STRBUF_INIT;
 483        struct string_list_item *item;
 484        int flag;
 485        unsigned char orig_sha1[20];
 486        const char *symref;
 487
 488        strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 489        if(!prefixcmp(refname, buf.buf)) {
 490                item = string_list_append(xstrdup(refname), rename->remote_branches);
 491                symref = resolve_ref(refname, orig_sha1, 1, &flag);
 492                if (flag & REF_ISSYMREF)
 493                        item->util = xstrdup(symref);
 494                else
 495                        item->util = NULL;
 496        }
 497
 498        return 0;
 499}
 500
 501static int migrate_file(struct remote *remote)
 502{
 503        struct strbuf buf = STRBUF_INIT;
 504        int i;
 505        char *path = NULL;
 506
 507        strbuf_addf(&buf, "remote.%s.url", remote->name);
 508        for (i = 0; i < remote->url_nr; i++)
 509                if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 510                        return error("Could not append '%s' to '%s'",
 511                                        remote->url[i], buf.buf);
 512        strbuf_reset(&buf);
 513        strbuf_addf(&buf, "remote.%s.push", remote->name);
 514        for (i = 0; i < remote->push_refspec_nr; i++)
 515                if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 516                        return error("Could not append '%s' to '%s'",
 517                                        remote->push_refspec[i], buf.buf);
 518        strbuf_reset(&buf);
 519        strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 520        for (i = 0; i < remote->fetch_refspec_nr; i++)
 521                if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 522                        return error("Could not append '%s' to '%s'",
 523                                        remote->fetch_refspec[i], buf.buf);
 524        if (remote->origin == REMOTE_REMOTES)
 525                path = git_path("remotes/%s", remote->name);
 526        else if (remote->origin == REMOTE_BRANCHES)
 527                path = git_path("branches/%s", remote->name);
 528        if (path)
 529                unlink_or_warn(path);
 530        return 0;
 531}
 532
 533static int mv(int argc, const char **argv)
 534{
 535        struct option options[] = {
 536                OPT_END()
 537        };
 538        struct remote *oldremote, *newremote;
 539        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 540        struct string_list remote_branches = { NULL, 0, 0, 0 };
 541        struct rename_info rename;
 542        int i;
 543
 544        if (argc != 3)
 545                usage_with_options(builtin_remote_usage, options);
 546
 547        rename.old = argv[1];
 548        rename.new = argv[2];
 549        rename.remote_branches = &remote_branches;
 550
 551        oldremote = remote_get(rename.old);
 552        if (!oldremote)
 553                die("No such remote: %s", rename.old);
 554
 555        if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 556                return migrate_file(oldremote);
 557
 558        newremote = remote_get(rename.new);
 559        if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 560                die("remote %s already exists.", rename.new);
 561
 562        strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 563        if (!valid_fetch_refspec(buf.buf))
 564                die("'%s' is not a valid remote name", rename.new);
 565
 566        strbuf_reset(&buf);
 567        strbuf_addf(&buf, "remote.%s", rename.old);
 568        strbuf_addf(&buf2, "remote.%s", rename.new);
 569        if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 570                return error("Could not rename config section '%s' to '%s'",
 571                                buf.buf, buf2.buf);
 572
 573        strbuf_reset(&buf);
 574        strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 575        if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 576                return error("Could not remove config section '%s'", buf.buf);
 577        for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 578                char *ptr;
 579
 580                strbuf_reset(&buf2);
 581                strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 582                ptr = strstr(buf2.buf, rename.old);
 583                if (ptr)
 584                        strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 585                                        rename.new, strlen(rename.new));
 586                if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 587                        return error("Could not append '%s'", buf.buf);
 588        }
 589
 590        read_branches();
 591        for (i = 0; i < branch_list.nr; i++) {
 592                struct string_list_item *item = branch_list.items + i;
 593                struct branch_info *info = item->util;
 594                if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 595                        strbuf_reset(&buf);
 596                        strbuf_addf(&buf, "branch.%s.remote", item->string);
 597                        if (git_config_set(buf.buf, rename.new)) {
 598                                return error("Could not set '%s'", buf.buf);
 599                        }
 600                }
 601        }
 602
 603        /*
 604         * First remove symrefs, then rename the rest, finally create
 605         * the new symrefs.
 606         */
 607        for_each_ref(read_remote_branches, &rename);
 608        for (i = 0; i < remote_branches.nr; i++) {
 609                struct string_list_item *item = remote_branches.items + i;
 610                int flag = 0;
 611                unsigned char sha1[20];
 612
 613                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
 926/*
 927 * Sorting comparison for a string list that has push_info
 928 * structs in its util field
 929 */
 930static int cmp_string_with_push(const void *va, const void *vb)
 931{
 932        const struct string_list_item *a = va;
 933        const struct string_list_item *b = vb;
 934        const struct push_info *a_push = a->util;
 935        const struct push_info *b_push = b->util;
 936        int cmp = strcmp(a->string, b->string);
 937        return cmp ? cmp : strcmp(a_push->dest, b_push->dest);
 938}
 939
 940int show_push_info_item(struct string_list_item *item, void *cb_data)
 941{
 942        struct show_info *show_info = cb_data;
 943        struct push_info *push_info = item->util;
 944        char *src = item->string, *status = NULL;
 945
 946        switch (push_info->status) {
 947        case PUSH_STATUS_CREATE:
 948                status = "create";
 949                break;
 950        case PUSH_STATUS_DELETE:
 951                status = "delete";
 952                src = "(none)";
 953                break;
 954        case PUSH_STATUS_UPTODATE:
 955                status = "up to date";
 956                break;
 957        case PUSH_STATUS_FASTFORWARD:
 958                status = "fast forwardable";
 959                break;
 960        case PUSH_STATUS_OUTOFDATE:
 961                status = "local out of date";
 962                break;
 963        case PUSH_STATUS_NOTQUERIED:
 964                break;
 965        }
 966        if (status)
 967                printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
 968                        push_info->forced ? "forces" : "pushes",
 969                        show_info->width2, push_info->dest, status);
 970        else
 971                printf("    %-*s %s to %s\n", show_info->width, src,
 972                        push_info->forced ? "forces" : "pushes",
 973                        push_info->dest);
 974        return 0;
 975}
 976
 977static int show(int argc, const char **argv)
 978{
 979        int no_query = 0, result = 0, query_flag = 0;
 980        struct option options[] = {
 981                OPT_GROUP("show specific options"),
 982                OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 983                OPT_END()
 984        };
 985        struct ref_states states;
 986        struct string_list info_list = { NULL, 0, 0, 0 };
 987        struct show_info info;
 988
 989        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 990
 991        if (argc < 1)
 992                return show_all();
 993
 994        if (!no_query)
 995                query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
 996
 997        memset(&states, 0, sizeof(states));
 998        memset(&info, 0, sizeof(info));
 999        info.states = &states;
1000        info.list = &info_list;
1001        for (; argc; argc--, argv++) {
1002                int i;
1003
1004                get_remote_ref_states(*argv, &states, query_flag);
1005
1006                printf("* remote %s\n  URL: %s\n", *argv,
1007                        states.remote->url_nr > 0 ?
1008                                states.remote->url[0] : "(no URL)");
1009                if (no_query)
1010                        printf("  HEAD branch: (not queried)\n");
1011                else if (!states.heads.nr)
1012                        printf("  HEAD branch: (unknown)\n");
1013                else if (states.heads.nr == 1)
1014                        printf("  HEAD branch: %s\n", states.heads.items[0].string);
1015                else {
1016                        printf("  HEAD branch (remote HEAD is ambiguous,"
1017                               " may be one of the following):\n");
1018                        for (i = 0; i < states.heads.nr; i++)
1019                                printf("    %s\n", states.heads.items[i].string);
1020                }
1021
1022                /* remote branch info */
1023                info.width = 0;
1024                for_each_string_list(add_remote_to_show_info, &states.new, &info);
1025                for_each_string_list(add_remote_to_show_info, &states.tracked, &info);
1026                for_each_string_list(add_remote_to_show_info, &states.stale, &info);
1027                if (info.list->nr)
1028                        printf("  Remote branch%s:%s\n",
1029                               info.list->nr > 1 ? "es" : "",
1030                                no_query ? " (status not queried)" : "");
1031                for_each_string_list(show_remote_info_item, info.list, &info);
1032                string_list_clear(info.list, 0);
1033
1034                /* git pull info */
1035                info.width = 0;
1036                info.any_rebase = 0;
1037                for_each_string_list(add_local_to_show_info, &branch_list, &info);
1038                if (info.list->nr)
1039                        printf("  Local branch%s configured for 'git pull':\n",
1040                               info.list->nr > 1 ? "es" : "");
1041                for_each_string_list(show_local_info_item, info.list, &info);
1042                string_list_clear(info.list, 0);
1043
1044                /* git push info */
1045                if (states.remote->mirror)
1046                        printf("  Local refs will be mirrored by 'git push'\n");
1047
1048                info.width = info.width2 = 0;
1049                for_each_string_list(add_push_to_show_info, &states.push, &info);
1050                qsort(info.list->items, info.list->nr,
1051                        sizeof(*info.list->items), cmp_string_with_push);
1052                if (info.list->nr)
1053                        printf("  Local ref%s configured for 'git push'%s:\n",
1054                                info.list->nr > 1 ? "s" : "",
1055                                no_query ? " (status not queried)" : "");
1056                for_each_string_list(show_push_info_item, info.list, &info);
1057                string_list_clear(info.list, 0);
1058
1059                free_remote_ref_states(&states);
1060        }
1061
1062        return result;
1063}
1064
1065static int set_head(int argc, const char **argv)
1066{
1067        int i, opt_a = 0, opt_d = 0, result = 0;
1068        struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1069        char *head_name = NULL;
1070
1071        struct option options[] = {
1072                OPT_GROUP("set-head specific options"),
1073                OPT_BOOLEAN('a', "auto", &opt_a,
1074                            "set refs/remotes/<name>/HEAD according to remote"),
1075                OPT_BOOLEAN('d', "delete", &opt_d,
1076                            "delete refs/remotes/<name>/HEAD"),
1077                OPT_END()
1078        };
1079        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1080        if (argc)
1081                strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1082
1083        if (!opt_a && !opt_d && argc == 2) {
1084                head_name = xstrdup(argv[1]);
1085        } else if (opt_a && !opt_d && argc == 1) {
1086                struct ref_states states;
1087                memset(&states, 0, sizeof(states));
1088                get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1089                if (!states.heads.nr)
1090                        result |= error("Cannot determine remote HEAD");
1091                else if (states.heads.nr > 1) {
1092                        result |= error("Multiple remote HEAD branches. "
1093                                        "Please choose one explicitly with:");
1094                        for (i = 0; i < states.heads.nr; i++)
1095                                fprintf(stderr, "  git remote set-head %s %s\n",
1096                                        argv[0], states.heads.items[i].string);
1097                } else
1098                        head_name = xstrdup(states.heads.items[0].string);
1099                free_remote_ref_states(&states);
1100        } else if (opt_d && !opt_a && argc == 1) {
1101                if (delete_ref(buf.buf, NULL, REF_NODEREF))
1102                        result |= error("Could not delete %s", buf.buf);
1103        } else
1104                usage_with_options(builtin_remote_usage, options);
1105
1106        if (head_name) {
1107                unsigned char sha1[20];
1108                strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1109                /* make sure it's valid */
1110                if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1111                        result |= error("Not a valid ref: %s", buf2.buf);
1112                else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1113                        result |= error("Could not setup %s", buf.buf);
1114                if (opt_a)
1115                        printf("%s/HEAD set to %s\n", argv[0], head_name);
1116                free(head_name);
1117        }
1118
1119        strbuf_release(&buf);
1120        strbuf_release(&buf2);
1121        return result;
1122}
1123
1124static int prune(int argc, const char **argv)
1125{
1126        int dry_run = 0, result = 0;
1127        struct option options[] = {
1128                OPT_GROUP("prune specific options"),
1129                OPT__DRY_RUN(&dry_run),
1130                OPT_END()
1131        };
1132
1133        argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1134
1135        if (argc < 1)
1136                usage_with_options(builtin_remote_usage, options);
1137
1138        for (; argc; argc--, argv++)
1139                result |= prune_remote(*argv, dry_run);
1140
1141        return result;
1142}
1143
1144static int prune_remote(const char *remote, int dry_run)
1145{
1146        int result = 0, i;
1147        struct ref_states states;
1148        const char *dangling_msg = dry_run
1149                ? " %s will become dangling!\n"
1150                : " %s has become dangling!\n";
1151
1152        memset(&states, 0, sizeof(states));
1153        get_remote_ref_states(remote, &states, GET_REF_STATES);
1154
1155        if (states.stale.nr) {
1156                printf("Pruning %s\n", remote);
1157                printf("URL: %s\n",
1158                       states.remote->url_nr
1159                       ? states.remote->url[0]
1160                       : "(no URL)");
1161        }
1162
1163        for (i = 0; i < states.stale.nr; i++) {
1164                const char *refname = states.stale.items[i].util;
1165
1166                if (!dry_run)
1167                        result |= delete_ref(refname, NULL, 0);
1168
1169                printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1170                       abbrev_ref(refname, "refs/remotes/"));
1171                warn_dangling_symref(dangling_msg, refname);
1172        }
1173
1174        free_remote_ref_states(&states);
1175        return result;
1176}
1177
1178static int get_one_remote_for_update(struct remote *remote, void *priv)
1179{
1180        struct string_list *list = priv;
1181        if (!remote->skip_default_update)
1182                string_list_append(remote->name, list);
1183        return 0;
1184}
1185
1186struct remote_group {
1187        const char *name;
1188        struct string_list *list;
1189} remote_group;
1190
1191static int get_remote_group(const char *key, const char *value, void *num_hits)
1192{
1193        if (!prefixcmp(key, "remotes.") &&
1194                        !strcmp(key + 8, remote_group.name)) {
1195                /* split list by white space */
1196                int space = strcspn(value, " \t\n");
1197                while (*value) {
1198                        if (space > 1) {
1199                                string_list_append(xstrndup(value, space),
1200                                                remote_group.list);
1201                                ++*((int *)num_hits);
1202                        }
1203                        value += space + (value[space] != '\0');
1204                        space = strcspn(value, " \t\n");
1205                }
1206        }
1207
1208        return 0;
1209}
1210
1211static int update(int argc, const char **argv)
1212{
1213        int i, result = 0, prune = 0;
1214        struct string_list list = { NULL, 0, 0, 0 };
1215        static const char *default_argv[] = { NULL, "default", NULL };
1216        struct option options[] = {
1217                OPT_GROUP("update specific options"),
1218                OPT_BOOLEAN('p', "prune", &prune,
1219                            "prune remotes after fetching"),
1220                OPT_END()
1221        };
1222
1223        argc = parse_options(argc, argv, options, builtin_remote_usage,
1224                             PARSE_OPT_KEEP_ARGV0);
1225        if (argc < 2) {
1226                argc = 2;
1227                argv = default_argv;
1228        }
1229
1230        remote_group.list = &list;
1231        for (i = 1; i < argc; i++) {
1232                int groups_found = 0;
1233                remote_group.name = argv[i];
1234                result = git_config(get_remote_group, &groups_found);
1235                if (!groups_found && (i != 1 || strcmp(argv[1], "default"))) {
1236                        struct remote *remote;
1237                        if (!remote_is_configured(argv[i]))
1238                                die("No such remote or remote group: %s",
1239                                    argv[i]);
1240                        remote = remote_get(argv[i]);
1241                        string_list_append(remote->name, remote_group.list);
1242                }
1243        }
1244
1245        if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
1246                result = for_each_remote(get_one_remote_for_update, &list);
1247
1248        for (i = 0; i < list.nr; i++) {
1249                int err = fetch_remote(list.items[i].string);
1250                result |= err;
1251                if (!err && prune)
1252                        result |= prune_remote(list.items[i].string, 0);
1253        }
1254
1255        /* all names were strdup()ed or strndup()ed */
1256        list.strdup_strings = 1;
1257        string_list_clear(&list, 0);
1258
1259        return result;
1260}
1261
1262static int get_one_entry(struct remote *remote, void *priv)
1263{
1264        struct string_list *list = priv;
1265
1266        if (remote->url_nr > 0) {
1267                int i;
1268
1269                for (i = 0; i < remote->url_nr; i++)
1270                        string_list_append(remote->name, list)->util = (void *)remote->url[i];
1271        } else
1272                string_list_append(remote->name, list)->util = NULL;
1273
1274        return 0;
1275}
1276
1277static int show_all(void)
1278{
1279        struct string_list list = { NULL, 0, 0 };
1280        int result = for_each_remote(get_one_entry, &list);
1281
1282        if (!result) {
1283                int i;
1284
1285                sort_string_list(&list);
1286                for (i = 0; i < list.nr; i++) {
1287                        struct string_list_item *item = list.items + i;
1288                        if (verbose)
1289                                printf("%s\t%s\n", item->string,
1290                                        item->util ? (const char *)item->util : "");
1291                        else {
1292                                if (i && !strcmp((item - 1)->string, item->string))
1293                                        continue;
1294                                printf("%s\n", item->string);
1295                        }
1296                }
1297        }
1298        return result;
1299}
1300
1301int cmd_remote(int argc, const char **argv, const char *prefix)
1302{
1303        struct option options[] = {
1304                OPT__VERBOSE(&verbose),
1305                OPT_END()
1306        };
1307        int result;
1308
1309        argc = parse_options(argc, argv, options, builtin_remote_usage,
1310                PARSE_OPT_STOP_AT_NON_OPTION);
1311
1312        if (argc < 1)
1313                result = show_all();
1314        else if (!strcmp(argv[0], "add"))
1315                result = add(argc, argv);
1316        else if (!strcmp(argv[0], "rename"))
1317                result = mv(argc, argv);
1318        else if (!strcmp(argv[0], "rm"))
1319                result = rm(argc, argv);
1320        else if (!strcmp(argv[0], "set-head"))
1321                result = set_head(argc, argv);
1322        else if (!strcmp(argv[0], "show"))
1323                result = show(argc, argv);
1324        else if (!strcmp(argv[0], "prune"))
1325                result = prune(argc, argv);
1326        else if (!strcmp(argv[0], "update"))
1327                result = update(argc, argv);
1328        else {
1329                error("Unknown subcommand: %s", argv[0]);
1330                usage_with_options(builtin_remote_usage, options);
1331        }
1332
1333        return result ? 1 : 0;
1334}