Andrew's git / gitweb.git / builtin-branch.c
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builtin-branch.con commit rev-parse --branches/--tags/--remotes=pattern (b09fe97)
   1/*
   2 * Builtin "git branch"
   3 *
   4 * Copyright (c) 2006 Kristian Høgsberg <krh@redhat.com>
   5 * Based on git-branch.sh by Junio C Hamano.
   6 */
   7
   8#include "cache.h"
   9#include "color.h"
  10#include "refs.h"
  11#include "commit.h"
  12#include "builtin.h"
  13#include "remote.h"
  14#include "parse-options.h"
  15#include "branch.h"
  16#include "diff.h"
  17#include "revision.h"
  18
  19static const char * const builtin_branch_usage[] = {
  20        "git branch [options] [-r | -a] [--merged | --no-merged]",
  21        "git branch [options] [-l] [-f] <branchname> [<start-point>]",
  22        "git branch [options] [-r] (-d | -D) <branchname>",
  23        "git branch [options] (-m | -M) [<oldbranch>] <newbranch>",
  24        NULL
  25};
  26
  27#define REF_LOCAL_BRANCH    0x01
  28#define REF_REMOTE_BRANCH   0x02
  29
  30static const char *head;
  31static unsigned char head_sha1[20];
  32
  33static int branch_use_color = -1;
  34static char branch_colors[][COLOR_MAXLEN] = {
  35        GIT_COLOR_RESET,
  36        GIT_COLOR_NORMAL,       /* PLAIN */
  37        GIT_COLOR_RED,          /* REMOTE */
  38        GIT_COLOR_NORMAL,       /* LOCAL */
  39        GIT_COLOR_GREEN,        /* CURRENT */
  40};
  41enum color_branch {
  42        BRANCH_COLOR_RESET = 0,
  43        BRANCH_COLOR_PLAIN = 1,
  44        BRANCH_COLOR_REMOTE = 2,
  45        BRANCH_COLOR_LOCAL = 3,
  46        BRANCH_COLOR_CURRENT = 4,
  47};
  48
  49static enum merge_filter {
  50        NO_FILTER = 0,
  51        SHOW_NOT_MERGED,
  52        SHOW_MERGED,
  53} merge_filter;
  54static unsigned char merge_filter_ref[20];
  55
  56static int parse_branch_color_slot(const char *var, int ofs)
  57{
  58        if (!strcasecmp(var+ofs, "plain"))
  59                return BRANCH_COLOR_PLAIN;
  60        if (!strcasecmp(var+ofs, "reset"))
  61                return BRANCH_COLOR_RESET;
  62        if (!strcasecmp(var+ofs, "remote"))
  63                return BRANCH_COLOR_REMOTE;
  64        if (!strcasecmp(var+ofs, "local"))
  65                return BRANCH_COLOR_LOCAL;
  66        if (!strcasecmp(var+ofs, "current"))
  67                return BRANCH_COLOR_CURRENT;
  68        return -1;
  69}
  70
  71static int git_branch_config(const char *var, const char *value, void *cb)
  72{
  73        if (!strcmp(var, "color.branch")) {
  74                branch_use_color = git_config_colorbool(var, value, -1);
  75                return 0;
  76        }
  77        if (!prefixcmp(var, "color.branch.")) {
  78                int slot = parse_branch_color_slot(var, 13);
  79                if (slot < 0)
  80                        return 0;
  81                if (!value)
  82                        return config_error_nonbool(var);
  83                color_parse(value, var, branch_colors[slot]);
  84                return 0;
  85        }
  86        return git_color_default_config(var, value, cb);
  87}
  88
  89static const char *branch_get_color(enum color_branch ix)
  90{
  91        if (branch_use_color > 0)
  92                return branch_colors[ix];
  93        return "";
  94}
  95
  96static int delete_branches(int argc, const char **argv, int force, int kinds)
  97{
  98        struct commit *rev, *head_rev = head_rev;
  99        unsigned char sha1[20];
 100        char *name = NULL;
 101        const char *fmt, *remote;
 102        int i;
 103        int ret = 0;
 104        struct strbuf bname = STRBUF_INIT;
 105
 106        switch (kinds) {
 107        case REF_REMOTE_BRANCH:
 108                fmt = "refs/remotes/%s";
 109                remote = "remote ";
 110                force = 1;
 111                break;
 112        case REF_LOCAL_BRANCH:
 113                fmt = "refs/heads/%s";
 114                remote = "";
 115                break;
 116        default:
 117                die("cannot use -a with -d");
 118        }
 119
 120        if (!force) {
 121                head_rev = lookup_commit_reference(head_sha1);
 122                if (!head_rev)
 123                        die("Couldn't look up commit object for HEAD");
 124        }
 125        for (i = 0; i < argc; i++, strbuf_release(&bname)) {
 126                strbuf_branchname(&bname, argv[i]);
 127                if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
 128                        error("Cannot delete the branch '%s' "
 129                              "which you are currently on.", bname.buf);
 130                        ret = 1;
 131                        continue;
 132                }
 133
 134                free(name);
 135
 136                name = xstrdup(mkpath(fmt, bname.buf));
 137                if (!resolve_ref(name, sha1, 1, NULL)) {
 138                        error("%sbranch '%s' not found.",
 139                                        remote, bname.buf);
 140                        ret = 1;
 141                        continue;
 142                }
 143
 144                rev = lookup_commit_reference(sha1);
 145                if (!rev) {
 146                        error("Couldn't look up commit object for '%s'", name);
 147                        ret = 1;
 148                        continue;
 149                }
 150
 151                /* This checks whether the merge bases of branch and
 152                 * HEAD contains branch -- which means that the HEAD
 153                 * contains everything in both.
 154                 */
 155
 156                if (!force &&
 157                    !in_merge_bases(rev, &head_rev, 1)) {
 158                        error("The branch '%s' is not an ancestor of "
 159                              "your current HEAD.\n"
 160                              "If you are sure you want to delete it, "
 161                              "run 'git branch -D %s'.", bname.buf, bname.buf);
 162                        ret = 1;
 163                        continue;
 164                }
 165
 166                if (delete_ref(name, sha1, 0)) {
 167                        error("Error deleting %sbranch '%s'", remote,
 168                              bname.buf);
 169                        ret = 1;
 170                } else {
 171                        struct strbuf buf = STRBUF_INIT;
 172                        printf("Deleted %sbranch %s (was %s).\n", remote,
 173                               bname.buf,
 174                               find_unique_abbrev(sha1, DEFAULT_ABBREV));
 175                        strbuf_addf(&buf, "branch.%s", bname.buf);
 176                        if (git_config_rename_section(buf.buf, NULL) < 0)
 177                                warning("Update of config-file failed");
 178                        strbuf_release(&buf);
 179                }
 180        }
 181
 182        free(name);
 183
 184        return(ret);
 185}
 186
 187struct ref_item {
 188        char *name;
 189        char *dest;
 190        unsigned int kind, len;
 191        struct commit *commit;
 192};
 193
 194struct ref_list {
 195        struct rev_info revs;
 196        int index, alloc, maxwidth, verbose, abbrev;
 197        struct ref_item *list;
 198        struct commit_list *with_commit;
 199        int kinds;
 200};
 201
 202static char *resolve_symref(const char *src, const char *prefix)
 203{
 204        unsigned char sha1[20];
 205        int flag;
 206        const char *dst, *cp;
 207
 208        dst = resolve_ref(src, sha1, 0, &flag);
 209        if (!(dst && (flag & REF_ISSYMREF)))
 210                return NULL;
 211        if (prefix && (cp = skip_prefix(dst, prefix)))
 212                dst = cp;
 213        return xstrdup(dst);
 214}
 215
 216static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 217{
 218        struct ref_list *ref_list = (struct ref_list*)(cb_data);
 219        struct ref_item *newitem;
 220        struct commit *commit;
 221        int kind, i;
 222        const char *prefix, *orig_refname = refname;
 223
 224        static struct {
 225                int kind;
 226                const char *prefix;
 227                int pfxlen;
 228        } ref_kind[] = {
 229                { REF_LOCAL_BRANCH, "refs/heads/", 11 },
 230                { REF_REMOTE_BRANCH, "refs/remotes/", 13 },
 231        };
 232
 233        /* Detect kind */
 234        for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
 235                prefix = ref_kind[i].prefix;
 236                if (strncmp(refname, prefix, ref_kind[i].pfxlen))
 237                        continue;
 238                kind = ref_kind[i].kind;
 239                refname += ref_kind[i].pfxlen;
 240                break;
 241        }
 242        if (ARRAY_SIZE(ref_kind) <= i)
 243                return 0;
 244
 245        /* Don't add types the caller doesn't want */
 246        if ((kind & ref_list->kinds) == 0)
 247                return 0;
 248
 249        commit = NULL;
 250        if (ref_list->verbose || ref_list->with_commit || merge_filter != NO_FILTER) {
 251                commit = lookup_commit_reference_gently(sha1, 1);
 252                if (!commit)
 253                        return error("branch '%s' does not point at a commit", refname);
 254
 255                /* Filter with with_commit if specified */
 256                if (!is_descendant_of(commit, ref_list->with_commit))
 257                        return 0;
 258
 259                if (merge_filter != NO_FILTER)
 260                        add_pending_object(&ref_list->revs,
 261                                           (struct object *)commit, refname);
 262        }
 263
 264        /* Resize buffer */
 265        if (ref_list->index >= ref_list->alloc) {
 266                ref_list->alloc = alloc_nr(ref_list->alloc);
 267                ref_list->list = xrealloc(ref_list->list,
 268                                ref_list->alloc * sizeof(struct ref_item));
 269        }
 270
 271        /* Record the new item */
 272        newitem = &(ref_list->list[ref_list->index++]);
 273        newitem->name = xstrdup(refname);
 274        newitem->kind = kind;
 275        newitem->commit = commit;
 276        newitem->len = strlen(refname);
 277        newitem->dest = resolve_symref(orig_refname, prefix);
 278        /* adjust for "remotes/" */
 279        if (newitem->kind == REF_REMOTE_BRANCH &&
 280            ref_list->kinds != REF_REMOTE_BRANCH)
 281                newitem->len += 8;
 282        if (newitem->len > ref_list->maxwidth)
 283                ref_list->maxwidth = newitem->len;
 284
 285        return 0;
 286}
 287
 288static void free_ref_list(struct ref_list *ref_list)
 289{
 290        int i;
 291
 292        for (i = 0; i < ref_list->index; i++) {
 293                free(ref_list->list[i].name);
 294                free(ref_list->list[i].dest);
 295        }
 296        free(ref_list->list);
 297}
 298
 299static int ref_cmp(const void *r1, const void *r2)
 300{
 301        struct ref_item *c1 = (struct ref_item *)(r1);
 302        struct ref_item *c2 = (struct ref_item *)(r2);
 303
 304        if (c1->kind != c2->kind)
 305                return c1->kind - c2->kind;
 306        return strcmp(c1->name, c2->name);
 307}
 308
 309static void fill_tracking_info(struct strbuf *stat, const char *branch_name,
 310                int show_upstream_ref)
 311{
 312        int ours, theirs;
 313        struct branch *branch = branch_get(branch_name);
 314
 315        if (!stat_tracking_info(branch, &ours, &theirs)) {
 316                if (branch && branch->merge && branch->merge[0]->dst &&
 317                    show_upstream_ref)
 318                        strbuf_addf(stat, "[%s] ",
 319                            shorten_unambiguous_ref(branch->merge[0]->dst, 0));
 320                return;
 321        }
 322
 323        strbuf_addch(stat, '[');
 324        if (show_upstream_ref)
 325                strbuf_addf(stat, "%s: ",
 326                        shorten_unambiguous_ref(branch->merge[0]->dst, 0));
 327        if (!ours)
 328                strbuf_addf(stat, "behind %d] ", theirs);
 329        else if (!theirs)
 330                strbuf_addf(stat, "ahead %d] ", ours);
 331        else
 332                strbuf_addf(stat, "ahead %d, behind %d] ", ours, theirs);
 333}
 334
 335static int matches_merge_filter(struct commit *commit)
 336{
 337        int is_merged;
 338
 339        if (merge_filter == NO_FILTER)
 340                return 1;
 341
 342        is_merged = !!(commit->object.flags & UNINTERESTING);
 343        return (is_merged == (merge_filter == SHOW_MERGED));
 344}
 345
 346static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 347                           int abbrev, int current, char *prefix)
 348{
 349        char c;
 350        int color;
 351        struct commit *commit = item->commit;
 352        struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
 353
 354        if (!matches_merge_filter(commit))
 355                return;
 356
 357        switch (item->kind) {
 358        case REF_LOCAL_BRANCH:
 359                color = BRANCH_COLOR_LOCAL;
 360                break;
 361        case REF_REMOTE_BRANCH:
 362                color = BRANCH_COLOR_REMOTE;
 363                break;
 364        default:
 365                color = BRANCH_COLOR_PLAIN;
 366                break;
 367        }
 368
 369        c = ' ';
 370        if (current) {
 371                c = '*';
 372                color = BRANCH_COLOR_CURRENT;
 373        }
 374
 375        strbuf_addf(&name, "%s%s", prefix, item->name);
 376        if (verbose)
 377                strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
 378                            maxwidth, name.buf,
 379                            branch_get_color(BRANCH_COLOR_RESET));
 380        else
 381                strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
 382                            name.buf, branch_get_color(BRANCH_COLOR_RESET));
 383
 384        if (item->dest)
 385                strbuf_addf(&out, " -> %s", item->dest);
 386        else if (verbose) {
 387                struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
 388                const char *sub = " **** invalid ref ****";
 389
 390                commit = item->commit;
 391                if (commit && !parse_commit(commit)) {
 392                        struct pretty_print_context ctx = {0};
 393                        pretty_print_commit(CMIT_FMT_ONELINE, commit,
 394                                            &subject, &ctx);
 395                        sub = subject.buf;
 396                }
 397
 398                if (item->kind == REF_LOCAL_BRANCH)
 399                        fill_tracking_info(&stat, item->name, verbose > 1);
 400
 401                strbuf_addf(&out, " %s %s%s",
 402                        find_unique_abbrev(item->commit->object.sha1, abbrev),
 403                        stat.buf, sub);
 404                strbuf_release(&stat);
 405                strbuf_release(&subject);
 406        }
 407        printf("%s\n", out.buf);
 408        strbuf_release(&name);
 409        strbuf_release(&out);
 410}
 411
 412static int calc_maxwidth(struct ref_list *refs)
 413{
 414        int i, w = 0;
 415        for (i = 0; i < refs->index; i++) {
 416                if (!matches_merge_filter(refs->list[i].commit))
 417                        continue;
 418                if (refs->list[i].len > w)
 419                        w = refs->list[i].len;
 420        }
 421        return w;
 422}
 423
 424
 425static void show_detached(struct ref_list *ref_list)
 426{
 427        struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
 428
 429        if (head_commit && is_descendant_of(head_commit, ref_list->with_commit)) {
 430                struct ref_item item;
 431                item.name = xstrdup("(no branch)");
 432                item.len = strlen(item.name);
 433                item.kind = REF_LOCAL_BRANCH;
 434                item.dest = NULL;
 435                item.commit = head_commit;
 436                if (item.len > ref_list->maxwidth)
 437                        ref_list->maxwidth = item.len;
 438                print_ref_item(&item, ref_list->maxwidth, ref_list->verbose, ref_list->abbrev, 1, "");
 439                free(item.name);
 440        }
 441}
 442
 443static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
 444{
 445        int i;
 446        struct ref_list ref_list;
 447
 448        memset(&ref_list, 0, sizeof(ref_list));
 449        ref_list.kinds = kinds;
 450        ref_list.verbose = verbose;
 451        ref_list.abbrev = abbrev;
 452        ref_list.with_commit = with_commit;
 453        if (merge_filter != NO_FILTER)
 454                init_revisions(&ref_list.revs, NULL);
 455        for_each_rawref(append_ref, &ref_list);
 456        if (merge_filter != NO_FILTER) {
 457                struct commit *filter;
 458                filter = lookup_commit_reference_gently(merge_filter_ref, 0);
 459                filter->object.flags |= UNINTERESTING;
 460                add_pending_object(&ref_list.revs,
 461                                   (struct object *) filter, "");
 462                ref_list.revs.limited = 1;
 463                prepare_revision_walk(&ref_list.revs);
 464                if (verbose)
 465                        ref_list.maxwidth = calc_maxwidth(&ref_list);
 466        }
 467
 468        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 469
 470        detached = (detached && (kinds & REF_LOCAL_BRANCH));
 471        if (detached)
 472                show_detached(&ref_list);
 473
 474        for (i = 0; i < ref_list.index; i++) {
 475                int current = !detached &&
 476                        (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
 477                        !strcmp(ref_list.list[i].name, head);
 478                char *prefix = (kinds != REF_REMOTE_BRANCH &&
 479                                ref_list.list[i].kind == REF_REMOTE_BRANCH)
 480                                ? "remotes/" : "";
 481                print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
 482                               abbrev, current, prefix);
 483        }
 484
 485        free_ref_list(&ref_list);
 486}
 487
 488static void rename_branch(const char *oldname, const char *newname, int force)
 489{
 490        struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
 491        unsigned char sha1[20];
 492        struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
 493        int recovery = 0;
 494
 495        if (!oldname)
 496                die("cannot rename the current branch while not on any.");
 497
 498        if (strbuf_check_branch_ref(&oldref, oldname)) {
 499                /*
 500                 * Bad name --- this could be an attempt to rename a
 501                 * ref that we used to allow to be created by accident.
 502                 */
 503                if (resolve_ref(oldref.buf, sha1, 1, NULL))
 504                        recovery = 1;
 505                else
 506                        die("Invalid branch name: '%s'", oldname);
 507        }
 508
 509        if (strbuf_check_branch_ref(&newref, newname))
 510                die("Invalid branch name: '%s'", newname);
 511
 512        if (resolve_ref(newref.buf, sha1, 1, NULL) && !force)
 513                die("A branch named '%s' already exists.", newref.buf + 11);
 514
 515        strbuf_addf(&logmsg, "Branch: renamed %s to %s",
 516                 oldref.buf, newref.buf);
 517
 518        if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
 519                die("Branch rename failed");
 520        strbuf_release(&logmsg);
 521
 522        if (recovery)
 523                warning("Renamed a misnamed branch '%s' away", oldref.buf + 11);
 524
 525        /* no need to pass logmsg here as HEAD didn't really move */
 526        if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
 527                die("Branch renamed to %s, but HEAD is not updated!", newname);
 528
 529        strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
 530        strbuf_release(&oldref);
 531        strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
 532        strbuf_release(&newref);
 533        if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
 534                die("Branch is renamed, but update of config-file failed");
 535        strbuf_release(&oldsection);
 536        strbuf_release(&newsection);
 537}
 538
 539static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
 540{
 541        merge_filter = ((opt->long_name[0] == 'n')
 542                        ? SHOW_NOT_MERGED
 543                        : SHOW_MERGED);
 544        if (unset)
 545                merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
 546        if (!arg)
 547                arg = "HEAD";
 548        if (get_sha1(arg, merge_filter_ref))
 549                die("malformed object name %s", arg);
 550        return 0;
 551}
 552
 553int cmd_branch(int argc, const char **argv, const char *prefix)
 554{
 555        int delete = 0, rename = 0, force_create = 0;
 556        int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
 557        int reflog = 0;
 558        enum branch_track track;
 559        int kinds = REF_LOCAL_BRANCH;
 560        struct commit_list *with_commit = NULL;
 561
 562        struct option options[] = {
 563                OPT_GROUP("Generic options"),
 564                OPT__VERBOSE(&verbose),
 565                OPT_SET_INT('t', "track",  &track, "set up tracking mode (see git-pull(1))",
 566                        BRANCH_TRACK_EXPLICIT),
 567                OPT_BOOLEAN( 0 , "color",  &branch_use_color, "use colored output"),
 568                OPT_SET_INT('r', NULL,     &kinds, "act on remote-tracking branches",
 569                        REF_REMOTE_BRANCH),
 570                {
 571                        OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
 572                        "print only branches that contain the commit",
 573                        PARSE_OPT_LASTARG_DEFAULT,
 574                        parse_opt_with_commit, (intptr_t)"HEAD",
 575                },
 576                {
 577                        OPTION_CALLBACK, 0, "with", &with_commit, "commit",
 578                        "print only branches that contain the commit",
 579                        PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
 580                        parse_opt_with_commit, (intptr_t) "HEAD",
 581                },
 582                OPT__ABBREV(&abbrev),
 583
 584                OPT_GROUP("Specific git-branch actions:"),
 585                OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
 586                        REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
 587                OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
 588                OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
 589                OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
 590                OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
 591                OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
 592                OPT_BOOLEAN('f', "force", &force_create, "force creation (when already exists)"),
 593                {
 594                        OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
 595                        "commit", "print only not merged branches",
 596                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 597                        opt_parse_merge_filter, (intptr_t) "HEAD",
 598                },
 599                {
 600                        OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
 601                        "commit", "print only merged branches",
 602                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 603                        opt_parse_merge_filter, (intptr_t) "HEAD",
 604                },
 605                OPT_END(),
 606        };
 607
 608        git_config(git_branch_config, NULL);
 609
 610        if (branch_use_color == -1)
 611                branch_use_color = git_use_color_default;
 612
 613        track = git_branch_track;
 614
 615        head = resolve_ref("HEAD", head_sha1, 0, NULL);
 616        if (!head)
 617                die("Failed to resolve HEAD as a valid ref.");
 618        head = xstrdup(head);
 619        if (!strcmp(head, "HEAD")) {
 620                detached = 1;
 621        } else {
 622                if (prefixcmp(head, "refs/heads/"))
 623                        die("HEAD not found below refs/heads!");
 624                head += 11;
 625        }
 626        hashcpy(merge_filter_ref, head_sha1);
 627
 628        argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
 629                             0);
 630        if (!!delete + !!rename + !!force_create > 1)
 631                usage_with_options(builtin_branch_usage, options);
 632
 633        if (delete)
 634                return delete_branches(argc, argv, delete > 1, kinds);
 635        else if (argc == 0)
 636                print_ref_list(kinds, detached, verbose, abbrev, with_commit);
 637        else if (rename && (argc == 1))
 638                rename_branch(head, argv[0], rename > 1);
 639        else if (rename && (argc == 2))
 640                rename_branch(argv[0], argv[1], rename > 1);
 641        else if (argc <= 2) {
 642                if (kinds != REF_LOCAL_BRANCH)
 643                        die("-a and -r options to 'git branch' do not make sense with a branch name");
 644                create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
 645                              force_create, reflog, track);
 646        } else
 647                usage_with_options(builtin_branch_usage, options);
 648
 649        return 0;
 650}