builtin-branch.c

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