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 "config.h"
  10 #include "color.h"
  11 #include "refs.h"
  12 #include "commit.h"
  13 #include "builtin.h"
  14 #include "remote.h"
  15 #include "parse-options.h"
  16 #include "branch.h"
  17 #include "diff.h"
  18 #include "revision.h"
  19 #include "string-list.h"
  20 #include "column.h"
  21 #include "utf8.h"
  22 #include "wt-status.h"
  23 #include "ref-filter.h"
  24 #include "worktree.h"
  25
  26 static const char * const builtin_branch_usage[] = {
  27         N_("git branch [<options>] [-r | -a] [--merged | --no-merged]"),
  28         N_("git branch [<options>] [-l] [-f] <branch-name> [<start-point>]"),
  29         N_("git branch [<options>] [-r] (-d | -D) <branch-name>..."),
  30         N_("git branch [<options>] (-m | -M) [<old-branch>] <new-branch>"),
  31         N_("git branch [<options>] (-c | -C) [<old-branch>] <new-branch>"),
  32         N_("git branch [<options>] [-r | -a] [--points-at]"),
  33         N_("git branch [<options>] [-r | -a] [--format]"),
  34         NULL
  35 };
  36
  37 static const char *head;
  38 static struct object_id head_oid;
  39
  40 static int branch_use_color = -1;
  41 static char branch_colors[][COLOR_MAXLEN] = {
  42         GIT_COLOR_RESET,
  43         GIT_COLOR_NORMAL,       /* PLAIN */
  44         GIT_COLOR_RED,          /* REMOTE */
  45         GIT_COLOR_NORMAL,       /* LOCAL */
  46         GIT_COLOR_GREEN,        /* CURRENT */
  47         GIT_COLOR_BLUE,         /* UPSTREAM */
  48 };
  49 enum color_branch {
  50         BRANCH_COLOR_RESET = 0,
  51         BRANCH_COLOR_PLAIN = 1,
  52         BRANCH_COLOR_REMOTE = 2,
  53         BRANCH_COLOR_LOCAL = 3,
  54         BRANCH_COLOR_CURRENT = 4,
  55         BRANCH_COLOR_UPSTREAM = 5
  56 };
  57
  58 static struct string_list output = STRING_LIST_INIT_DUP;
  59 static unsigned int colopts;
  60
  61 static int parse_branch_color_slot(const char *slot)
  62 {
  63         if (!strcasecmp(slot, "plain"))
  64                 return BRANCH_COLOR_PLAIN;
  65         if (!strcasecmp(slot, "reset"))
  66                 return BRANCH_COLOR_RESET;
  67         if (!strcasecmp(slot, "remote"))
  68                 return BRANCH_COLOR_REMOTE;
  69         if (!strcasecmp(slot, "local"))
  70                 return BRANCH_COLOR_LOCAL;
  71         if (!strcasecmp(slot, "current"))
  72                 return BRANCH_COLOR_CURRENT;
  73         if (!strcasecmp(slot, "upstream"))
  74                 return BRANCH_COLOR_UPSTREAM;
  75         return -1;
  76 }
  77
  78 static int git_branch_config(const char *var, const char *value, void *cb)
  79 {
  80         const char *slot_name;
  81
  82         if (starts_with(var, "column."))
  83                 return git_column_config(var, value, "branch", &colopts);
  84         if (!strcmp(var, "color.branch")) {
  85                 branch_use_color = git_config_colorbool(var, value);
  86                 return 0;
  87         }
  88         if (skip_prefix(var, "color.branch.", &slot_name)) {
  89                 int slot = parse_branch_color_slot(slot_name);
  90                 if (slot < 0)
  91                         return 0;
  92                 if (!value)
  93                         return config_error_nonbool(var);
  94                 return color_parse(value, branch_colors[slot]);
  95         }
  96         return git_color_default_config(var, value, cb);
  97 }
  98
  99 static const char *branch_get_color(enum color_branch ix)
 100 {
 101         if (want_color(branch_use_color))
 102                 return branch_colors[ix];
 103         return "";
 104 }
 105
 106 static int branch_merged(int kind, const char *name,
 107                          struct commit *rev, struct commit *head_rev)
 108 {
 109         /*
 110          * This checks whether the merge bases of branch and HEAD (or
 111          * the other branch this branch builds upon) contains the
 112          * branch, which means that the branch has already been merged
 113          * safely to HEAD (or the other branch).
 114          */
 115         struct commit *reference_rev = NULL;
 116         const char *reference_name = NULL;
 117         void *reference_name_to_free = NULL;
 118         int merged;
 119
 120         if (kind == FILTER_REFS_BRANCHES) {
 121                 struct branch *branch = branch_get(name);
 122                 const char *upstream = branch_get_upstream(branch, NULL);
 123                 struct object_id oid;
 124
 125                 if (upstream &&
 126                     (reference_name = reference_name_to_free =
 127                      resolve_refdup(upstream, RESOLVE_REF_READING,
 128                                     &oid, NULL)) != NULL)
 129                         reference_rev = lookup_commit_reference(&oid);
 130         }
 131         if (!reference_rev)
 132                 reference_rev = head_rev;
 133
 134         merged = in_merge_bases(rev, reference_rev);
 135
 136         /*
 137          * After the safety valve is fully redefined to "check with
 138          * upstream, if any, otherwise with HEAD", we should just
 139          * return the result of the in_merge_bases() above without
 140          * any of the following code, but during the transition period,
 141          * a gentle reminder is in order.
 142          */
 143         if ((head_rev != reference_rev) &&
 144             in_merge_bases(rev, head_rev) != merged) {
 145                 if (merged)
 146                         warning(_("deleting branch '%s' that has been merged to\n"
 147                                 "         '%s', but not yet merged to HEAD."),
 148                                 name, reference_name);
 149                 else
 150                         warning(_("not deleting branch '%s' that is not yet merged to\n"
 151                                 "         '%s', even though it is merged to HEAD."),
 152                                 name, reference_name);
 153         }
 154         free(reference_name_to_free);
 155         return merged;
 156 }
 157
 158 static int check_branch_commit(const char *branchname, const char *refname,
 159                                const struct object_id *oid, struct commit *head_rev,
 160                                int kinds, int force)
 161 {
 162         struct commit *rev = lookup_commit_reference(oid);
 163         if (!rev) {
 164                 error(_("Couldn't look up commit object for '%s'"), refname);
 165                 return -1;
 166         }
 167         if (!force && !branch_merged(kinds, branchname, rev, head_rev)) {
 168                 error(_("The branch '%s' is not fully merged.\n"
 169                       "If you are sure you want to delete it, "
 170                       "run 'git branch -D %s'."), branchname, branchname);
 171                 return -1;
 172         }
 173         return 0;
 174 }
 175
 176 static void delete_branch_config(const char *branchname)
 177 {
 178         struct strbuf buf = STRBUF_INIT;
 179         strbuf_addf(&buf, "branch.%s", branchname);
 180         if (git_config_rename_section(buf.buf, NULL) < 0)
 181                 warning(_("Update of config-file failed"));
 182         strbuf_release(&buf);
 183 }
 184
 185 static int delete_branches(int argc, const char **argv, int force, int kinds,
 186                            int quiet)
 187 {
 188         struct commit *head_rev = NULL;
 189         struct object_id oid;
 190         char *name = NULL;
 191         const char *fmt;
 192         int i;
 193         int ret = 0;
 194         int remote_branch = 0;
 195         struct strbuf bname = STRBUF_INIT;
 196         unsigned allowed_interpret;
 197
 198         switch (kinds) {
 199         case FILTER_REFS_REMOTES:
 200                 fmt = "refs/remotes/%s";
 201                 /* For subsequent UI messages */
 202                 remote_branch = 1;
 203                 allowed_interpret = INTERPRET_BRANCH_REMOTE;
 204
 205                 force = 1;
 206                 break;
 207         case FILTER_REFS_BRANCHES:
 208                 fmt = "refs/heads/%s";
 209                 allowed_interpret = INTERPRET_BRANCH_LOCAL;
 210                 break;
 211         default:
 212                 die(_("cannot use -a with -d"));
 213         }
 214
 215         if (!force) {
 216                 head_rev = lookup_commit_reference(&head_oid);
 217                 if (!head_rev)
 218                         die(_("Couldn't look up commit object for HEAD"));
 219         }
 220         for (i = 0; i < argc; i++, strbuf_reset(&bname)) {
 221                 char *target = NULL;
 222                 int flags = 0;
 223
 224                 strbuf_branchname(&bname, argv[i], allowed_interpret);
 225                 free(name);
 226                 name = mkpathdup(fmt, bname.buf);
 227
 228                 if (kinds == FILTER_REFS_BRANCHES) {
 229                         const struct worktree *wt =
 230                                 find_shared_symref("HEAD", name);
 231                         if (wt) {
 232                                 error(_("Cannot delete branch '%s' "
 233                                         "checked out at '%s'"),
 234                                       bname.buf, wt->path);
 235                                 ret = 1;
 236                                 continue;
 237                         }
 238                 }
 239
 240                 target = resolve_refdup(name,
 241                                         RESOLVE_REF_READING
 242                                         | RESOLVE_REF_NO_RECURSE
 243                                         | RESOLVE_REF_ALLOW_BAD_NAME,
 244                                         &oid, &flags);
 245                 if (!target) {
 246                         error(remote_branch
 247                               ? _("remote-tracking branch '%s' not found.")
 248                               : _("branch '%s' not found."), bname.buf);
 249                         ret = 1;
 250                         continue;
 251                 }
 252
 253                 if (!(flags & (REF_ISSYMREF|REF_ISBROKEN)) &&
 254                     check_branch_commit(bname.buf, name, &oid, head_rev, kinds,
 255                                         force)) {
 256                         ret = 1;
 257                         goto next;
 258                 }
 259
 260                 if (delete_ref(NULL, name, is_null_oid(&oid) ? NULL : &oid,
 261                                REF_NODEREF)) {
 262                         error(remote_branch
 263                               ? _("Error deleting remote-tracking branch '%s'")
 264                               : _("Error deleting branch '%s'"),
 265                               bname.buf);
 266                         ret = 1;
 267                         goto next;
 268                 }
 269                 if (!quiet) {
 270                         printf(remote_branch
 271                                ? _("Deleted remote-tracking branch %s (was %s).\n")
 272                                : _("Deleted branch %s (was %s).\n"),
 273                                bname.buf,
 274                                (flags & REF_ISBROKEN) ? "broken"
 275                                : (flags & REF_ISSYMREF) ? target
 276                                : find_unique_abbrev(oid.hash, DEFAULT_ABBREV));
 277                 }
 278                 delete_branch_config(bname.buf);
 279
 280         next:
 281                 free(target);
 282         }
 283
 284         free(name);
 285         strbuf_release(&bname);
 286
 287         return ret;
 288 }
 289
 290 static int calc_maxwidth(struct ref_array *refs, int remote_bonus)
 291 {
 292         int i, max = 0;
 293         for (i = 0; i < refs->nr; i++) {
 294                 struct ref_array_item *it = refs->items[i];
 295                 const char *desc = it->refname;
 296                 int w;
 297
 298                 skip_prefix(it->refname, "refs/heads/", &desc);
 299                 skip_prefix(it->refname, "refs/remotes/", &desc);
 300                 if (it->kind == FILTER_REFS_DETACHED_HEAD) {
 301                         char *head_desc = get_head_description();
 302                         w = utf8_strwidth(head_desc);
 303                         free(head_desc);
 304                 } else
 305                         w = utf8_strwidth(desc);
 306
 307                 if (it->kind == FILTER_REFS_REMOTES)
 308                         w += remote_bonus;
 309                 if (w > max)
 310                         max = w;
 311         }
 312         return max;
 313 }
 314
 315 static const char *quote_literal_for_format(const char *s)
 316 {
 317         static struct strbuf buf = STRBUF_INIT;
 318
 319         strbuf_reset(&buf);
 320         while (*s) {
 321                 const char *ep = strchrnul(s, '%');
 322                 if (s < ep)
 323                         strbuf_add(&buf, s, ep - s);
 324                 if (*ep == '%') {
 325                         strbuf_addstr(&buf, "%%");
 326                         s = ep + 1;
 327                 } else {
 328                         s = ep;
 329                 }
 330         }
 331         return buf.buf;
 332 }
 333
 334 static char *build_format(struct ref_filter *filter, int maxwidth, const char *remote_prefix)
 335 {
 336         struct strbuf fmt = STRBUF_INIT;
 337         struct strbuf local = STRBUF_INIT;
 338         struct strbuf remote = STRBUF_INIT;
 339
 340         strbuf_addf(&local, "%%(if)%%(HEAD)%%(then)* %s%%(else)  %s%%(end)",
 341                     branch_get_color(BRANCH_COLOR_CURRENT),
 342                     branch_get_color(BRANCH_COLOR_LOCAL));
 343         strbuf_addf(&remote, "  %s",
 344                     branch_get_color(BRANCH_COLOR_REMOTE));
 345
 346         if (filter->verbose) {
 347                 struct strbuf obname = STRBUF_INIT;
 348
 349                 if (filter->abbrev < 0)
 350                         strbuf_addf(&obname, "%%(objectname:short)");
 351                 else if (!filter->abbrev)
 352                         strbuf_addf(&obname, "%%(objectname)");
 353                 else
 354                         strbuf_addf(&obname, "%%(objectname:short=%d)", filter->abbrev);
 355
 356                 strbuf_addf(&local, "%%(align:%d,left)%%(refname:lstrip=2)%%(end)", maxwidth);
 357                 strbuf_addstr(&local, branch_get_color(BRANCH_COLOR_RESET));
 358                 strbuf_addf(&local, " %s ", obname.buf);
 359
 360                 if (filter->verbose > 1)
 361                         strbuf_addf(&local, "%%(if)%%(upstream)%%(then)[%s%%(upstream:short)%s%%(if)%%(upstream:track)"
 362                                     "%%(then): %%(upstream:track,nobracket)%%(end)] %%(end)%%(contents:subject)",
 363                                     branch_get_color(BRANCH_COLOR_UPSTREAM), branch_get_color(BRANCH_COLOR_RESET));
 364                 else
 365                         strbuf_addf(&local, "%%(if)%%(upstream:track)%%(then)%%(upstream:track) %%(end)%%(contents:subject)");
 366
 367                 strbuf_addf(&remote, "%%(align:%d,left)%s%%(refname:lstrip=2)%%(end)%s"
 368                             "%%(if)%%(symref)%%(then) -> %%(symref:short)"
 369                             "%%(else) %s %%(contents:subject)%%(end)",
 370                             maxwidth, quote_literal_for_format(remote_prefix),
 371                             branch_get_color(BRANCH_COLOR_RESET), obname.buf);
 372                 strbuf_release(&obname);
 373         } else {
 374                 strbuf_addf(&local, "%%(refname:lstrip=2)%s%%(if)%%(symref)%%(then) -> %%(symref:short)%%(end)",
 375                             branch_get_color(BRANCH_COLOR_RESET));
 376                 strbuf_addf(&remote, "%s%%(refname:lstrip=2)%s%%(if)%%(symref)%%(then) -> %%(symref:short)%%(end)",
 377                             quote_literal_for_format(remote_prefix),
 378                             branch_get_color(BRANCH_COLOR_RESET));
 379         }
 380
 381         strbuf_addf(&fmt, "%%(if:notequals=refs/remotes)%%(refname:rstrip=-2)%%(then)%s%%(else)%s%%(end)", local.buf, remote.buf);
 382
 383         strbuf_release(&local);
 384         strbuf_release(&remote);
 385         return strbuf_detach(&fmt, NULL);
 386 }
 387
 388 static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sorting, struct ref_format *format)
 389 {
 390         int i;
 391         struct ref_array array;
 392         int maxwidth = 0;
 393         const char *remote_prefix = "";
 394         struct strbuf out = STRBUF_INIT;
 395         char *to_free = NULL;
 396
 397         /*
 398          * If we are listing more than just remote branches,
 399          * then remote branches will have a "remotes/" prefix.
 400          * We need to account for this in the width.
 401          */
 402         if (filter->kind != FILTER_REFS_REMOTES)
 403                 remote_prefix = "remotes/";
 404
 405         memset(&array, 0, sizeof(array));
 406
 407         filter_refs(&array, filter, filter->kind | FILTER_REFS_INCLUDE_BROKEN);
 408
 409         if (filter->verbose)
 410                 maxwidth = calc_maxwidth(&array, strlen(remote_prefix));
 411
 412         if (!format->format)
 413                 format->format = to_free = build_format(filter, maxwidth, remote_prefix);
 414         format->use_color = branch_use_color;
 415
 416         if (verify_ref_format(format))
 417                 die(_("unable to parse format string"));
 418
 419         ref_array_sort(sorting, &array);
 420
 421         for (i = 0; i < array.nr; i++) {
 422                 format_ref_array_item(array.items[i], format, &out);
 423                 if (column_active(colopts)) {
 424                         assert(!filter->verbose && "--column and --verbose are incompatible");
 425                          /* format to a string_list to let print_columns() do its job */
 426                         string_list_append(&output, out.buf);
 427                 } else {
 428                         fwrite(out.buf, 1, out.len, stdout);
 429                         putchar('\n');
 430                 }
 431                 strbuf_release(&out);
 432         }
 433
 434         ref_array_clear(&array);
 435         free(to_free);
 436 }
 437
 438 static void reject_rebase_or_bisect_branch(const char *target)
 439 {
 440         struct worktree **worktrees = get_worktrees(0);
 441         int i;
 442
 443         for (i = 0; worktrees[i]; i++) {
 444                 struct worktree *wt = worktrees[i];
 445
 446                 if (!wt->is_detached)
 447                         continue;
 448
 449                 if (is_worktree_being_rebased(wt, target))
 450                         die(_("Branch %s is being rebased at %s"),
 451                             target, wt->path);
 452
 453                 if (is_worktree_being_bisected(wt, target))
 454                         die(_("Branch %s is being bisected at %s"),
 455                             target, wt->path);
 456         }
 457
 458         free_worktrees(worktrees);
 459 }
 460
 461 static void copy_or_rename_branch(const char *oldname, const char *newname, int copy, int force)
 462 {
 463         struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
 464         struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
 465         int recovery = 0;
 466         int clobber_head_ok;
 467
 468         if (!oldname) {
 469                 if (copy)
 470                         die(_("cannot copy the current branch while not on any."));
 471                 else
 472                         die(_("cannot rename the current branch while not on any."));
 473         }
 474
 475         if (strbuf_check_branch_ref(&oldref, oldname)) {
 476                 /*
 477                  * Bad name --- this could be an attempt to rename a
 478                  * ref that we used to allow to be created by accident.
 479                  */
 480                 if (ref_exists(oldref.buf))
 481                         recovery = 1;
 482                 else
 483                         die(_("Invalid branch name: '%s'"), oldname);
 484         }
 485
 486         /*
 487          * A command like "git branch -M currentbranch currentbranch" cannot
 488          * cause the worktree to become inconsistent with HEAD, so allow it.
 489          */
 490         clobber_head_ok = !strcmp(oldname, newname);
 491
 492         validate_new_branchname(newname, &newref, force, clobber_head_ok);
 493
 494         reject_rebase_or_bisect_branch(oldref.buf);
 495
 496         if (copy)
 497                 strbuf_addf(&logmsg, "Branch: copied %s to %s",
 498                             oldref.buf, newref.buf);
 499         else
 500                 strbuf_addf(&logmsg, "Branch: renamed %s to %s",
 501                             oldref.buf, newref.buf);
 502
 503         if (!copy && rename_ref(oldref.buf, newref.buf, logmsg.buf))
 504                 die(_("Branch rename failed"));
 505         if (copy && copy_existing_ref(oldref.buf, newref.buf, logmsg.buf))
 506                 die(_("Branch copy failed"));
 507
 508         if (recovery) {
 509                 if (copy)
 510                         warning(_("Copied a misnamed branch '%s' away"),
 511                                 oldref.buf + 11);
 512                 else
 513                         warning(_("Renamed a misnamed branch '%s' away"),
 514                                 oldref.buf + 11);
 515         }
 516
 517         if (!copy &&
 518             replace_each_worktree_head_symref(oldref.buf, newref.buf, logmsg.buf))
 519                 die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
 520
 521         strbuf_release(&logmsg);
 522
 523         strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
 524         strbuf_release(&oldref);
 525         strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
 526         strbuf_release(&newref);
 527         if (!copy && git_config_rename_section(oldsection.buf, newsection.buf) < 0)
 528                 die(_("Branch is renamed, but update of config-file failed"));
 529         if (copy && strcmp(oldname, newname) && git_config_copy_section(oldsection.buf, newsection.buf) < 0)
 530                 die(_("Branch is copied, but update of config-file failed"));
 531         strbuf_release(&oldsection);
 532         strbuf_release(&newsection);
 533 }
 534
 535 static GIT_PATH_FUNC(edit_description, "EDIT_DESCRIPTION")
 536
 537 static int edit_branch_description(const char *branch_name)
 538 {
 539         struct strbuf buf = STRBUF_INIT;
 540         struct strbuf name = STRBUF_INIT;
 541
 542         read_branch_desc(&buf, branch_name);
 543         if (!buf.len || buf.buf[buf.len-1] != '\n')
 544                 strbuf_addch(&buf, '\n');
 545         strbuf_commented_addf(&buf,
 546                     _("Please edit the description for the branch\n"
 547                       "  %s\n"
 548                       "Lines starting with '%c' will be stripped.\n"),
 549                     branch_name, comment_line_char);
 550         write_file_buf(edit_description(), buf.buf, buf.len);
 551         strbuf_reset(&buf);
 552         if (launch_editor(edit_description(), &buf, NULL)) {
 553                 strbuf_release(&buf);
 554                 return -1;
 555         }
 556         strbuf_stripspace(&buf, 1);
 557
 558         strbuf_addf(&name, "branch.%s.description", branch_name);
 559         git_config_set(name.buf, buf.len ? buf.buf : NULL);
 560         strbuf_release(&name);
 561         strbuf_release(&buf);
 562
 563         return 0;
 564 }
 565
 566 int cmd_branch(int argc, const char **argv, const char *prefix)
 567 {
 568         int delete = 0, rename = 0, copy = 0, force = 0, list = 0;
 569         int reflog = 0, edit_description = 0;
 570         int quiet = 0, unset_upstream = 0;
 571         const char *new_upstream = NULL;
 572         enum branch_track track;
 573         struct ref_filter filter;
 574         int icase = 0;
 575         static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 576         struct ref_format format = REF_FORMAT_INIT;
 577
 578         struct option options[] = {
 579                 OPT_GROUP(N_("Generic options")),
 580                 OPT__VERBOSE(&filter.verbose,
 581                         N_("show hash and subject, give twice for upstream branch")),
 582                 OPT__QUIET(&quiet, N_("suppress informational messages")),
 583                 OPT_SET_INT('t', "track",  &track, N_("set up tracking mode (see git-pull(1))"),
 584                         BRANCH_TRACK_EXPLICIT),
 585                 { OPTION_SET_INT, 0, "set-upstream", &track, NULL, N_("do not use"),
 586                         PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, BRANCH_TRACK_OVERRIDE },
 587                 OPT_STRING('u', "set-upstream-to", &new_upstream, N_("upstream"), N_("change the upstream info")),
 588                 OPT_BOOL(0, "unset-upstream", &unset_upstream, N_("Unset the upstream info")),
 589                 OPT__COLOR(&branch_use_color, N_("use colored output")),
 590                 OPT_SET_INT('r', "remotes",     &filter.kind, N_("act on remote-tracking branches"),
 591                         FILTER_REFS_REMOTES),
 592                 OPT_CONTAINS(&filter.with_commit, N_("print only branches that contain the commit")),
 593                 OPT_NO_CONTAINS(&filter.no_commit, N_("print only branches that don't contain the commit")),
 594                 OPT_WITH(&filter.with_commit, N_("print only branches that contain the commit")),
 595                 OPT_WITHOUT(&filter.no_commit, N_("print only branches that don't contain the commit")),
 596                 OPT__ABBREV(&filter.abbrev),
 597
 598                 OPT_GROUP(N_("Specific git-branch actions:")),
 599                 OPT_SET_INT('a', "all", &filter.kind, N_("list both remote-tracking and local branches"),
 600                         FILTER_REFS_REMOTES | FILTER_REFS_BRANCHES),
 601                 OPT_BIT('d', "delete", &delete, N_("delete fully merged branch"), 1),
 602                 OPT_BIT('D', NULL, &delete, N_("delete branch (even if not merged)"), 2),
 603                 OPT_BIT('m', "move", &rename, N_("move/rename a branch and its reflog"), 1),
 604                 OPT_BIT('M', NULL, &rename, N_("move/rename a branch, even if target exists"), 2),
 605                 OPT_BIT('c', "copy", &copy, N_("copy a branch and its reflog"), 1),
 606                 OPT_BIT('C', NULL, &copy, N_("copy a branch, even if target exists"), 2),
 607                 OPT_BOOL(0, "list", &list, N_("list branch names")),
 608                 OPT_BOOL('l', "create-reflog", &reflog, N_("create the branch's reflog")),
 609                 OPT_BOOL(0, "edit-description", &edit_description,
 610                          N_("edit the description for the branch")),
 611                 OPT__FORCE(&force, N_("force creation, move/rename, deletion")),
 612                 OPT_MERGED(&filter, N_("print only branches that are merged")),
 613                 OPT_NO_MERGED(&filter, N_("print only branches that are not merged")),
 614                 OPT_COLUMN(0, "column", &colopts, N_("list branches in columns")),
 615                 OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
 616                              N_("field name to sort on"), &parse_opt_ref_sorting),
 617                 {
 618                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 619                         N_("print only branches of the object"), 0, parse_opt_object_name
 620                 },
 621                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 622                 OPT_STRING(  0 , "format", &format.format, N_("format"), N_("format to use for the output")),
 623                 OPT_END(),
 624         };
 625
 626         setup_ref_filter_porcelain_msg();
 627
 628         memset(&filter, 0, sizeof(filter));
 629         filter.kind = FILTER_REFS_BRANCHES;
 630         filter.abbrev = -1;
 631
 632         if (argc == 2 && !strcmp(argv[1], "-h"))
 633                 usage_with_options(builtin_branch_usage, options);
 634
 635         git_config(git_branch_config, NULL);
 636
 637         track = git_branch_track;
 638
 639         head = resolve_refdup("HEAD", 0, &head_oid, NULL);
 640         if (!head)
 641                 die(_("Failed to resolve HEAD as a valid ref."));
 642         if (!strcmp(head, "HEAD"))
 643                 filter.detached = 1;
 644         else if (!skip_prefix(head, "refs/heads/", &head))
 645                 die(_("HEAD not found below refs/heads!"));
 646
 647         argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
 648                              0);
 649
 650         if (!delete && !rename && !copy && !edit_description && !new_upstream && !unset_upstream && argc == 0)
 651                 list = 1;
 652
 653         if (filter.with_commit || filter.merge != REF_FILTER_MERGED_NONE || filter.points_at.nr ||
 654             filter.no_commit)
 655                 list = 1;
 656
 657         if (!!delete + !!rename + !!copy + !!new_upstream +
 658             list + unset_upstream > 1)
 659                 usage_with_options(builtin_branch_usage, options);
 660
 661         if (filter.abbrev == -1)
 662                 filter.abbrev = DEFAULT_ABBREV;
 663         filter.ignore_case = icase;
 664
 665         finalize_colopts(&colopts, -1);
 666         if (filter.verbose) {
 667                 if (explicitly_enable_column(colopts))
 668                         die(_("--column and --verbose are incompatible"));
 669                 colopts = 0;
 670         }
 671
 672         if (force) {
 673                 delete *= 2;
 674                 rename *= 2;
 675                 copy *= 2;
 676         }
 677
 678         if (delete) {
 679                 if (!argc)
 680                         die(_("branch name required"));
 681                 return delete_branches(argc, argv, delete > 1, filter.kind, quiet);
 682         } else if (list) {
 683                 /*  git branch --local also shows HEAD when it is detached */
 684                 if ((filter.kind & FILTER_REFS_BRANCHES) && filter.detached)
 685                         filter.kind |= FILTER_REFS_DETACHED_HEAD;
 686                 filter.name_patterns = argv;
 687                 /*
 688                  * If no sorting parameter is given then we default to sorting
 689                  * by 'refname'. This would give us an alphabetically sorted
 690                  * array with the 'HEAD' ref at the beginning followed by
 691                  * local branches 'refs/heads/...' and finally remote-tacking
 692                  * branches 'refs/remotes/...'.
 693                  */
 694                 if (!sorting)
 695                         sorting = ref_default_sorting();
 696                 sorting->ignore_case = icase;
 697                 print_ref_list(&filter, sorting, &format);
 698                 print_columns(&output, colopts, NULL);
 699                 string_list_clear(&output, 0);
 700                 return 0;
 701         }
 702         else if (edit_description) {
 703                 const char *branch_name;
 704                 struct strbuf branch_ref = STRBUF_INIT;
 705
 706                 if (!argc) {
 707                         if (filter.detached)
 708                                 die(_("Cannot give description to detached HEAD"));
 709                         branch_name = head;
 710                 } else if (argc == 1)
 711                         branch_name = argv[0];
 712                 else
 713                         die(_("cannot edit description of more than one branch"));
 714
 715                 strbuf_addf(&branch_ref, "refs/heads/%s", branch_name);
 716                 if (!ref_exists(branch_ref.buf)) {
 717                         strbuf_release(&branch_ref);
 718
 719                         if (!argc)
 720                                 return error(_("No commit on branch '%s' yet."),
 721                                              branch_name);
 722                         else
 723                                 return error(_("No branch named '%s'."),
 724                                              branch_name);
 725                 }
 726                 strbuf_release(&branch_ref);
 727
 728                 if (edit_branch_description(branch_name))
 729                         return 1;
 730         } else if (copy) {
 731                 if (!argc)
 732                         die(_("branch name required"));
 733                 else if (argc == 1)
 734                         copy_or_rename_branch(head, argv[0], 1, copy > 1);
 735                 else if (argc == 2)
 736                         copy_or_rename_branch(argv[0], argv[1], 1, copy > 1);
 737                 else
 738                         die(_("too many branches for a copy operation"));
 739         } else if (rename) {
 740                 if (!argc)
 741                         die(_("branch name required"));
 742                 else if (argc == 1)
 743                         copy_or_rename_branch(head, argv[0], 0, rename > 1);
 744                 else if (argc == 2)
 745                         copy_or_rename_branch(argv[0], argv[1], 0, rename > 1);
 746                 else
 747                         die(_("too many arguments for a rename operation"));
 748         } else if (new_upstream) {
 749                 struct branch *branch = branch_get(argv[0]);
 750
 751                 if (argc > 1)
 752                         die(_("too many arguments to set new upstream"));
 753
 754                 if (!branch) {
 755                         if (!argc || !strcmp(argv[0], "HEAD"))
 756                                 die(_("could not set upstream of HEAD to %s when "
 757                                       "it does not point to any branch."),
 758                                     new_upstream);
 759                         die(_("no such branch '%s'"), argv[0]);
 760                 }
 761
 762                 if (!ref_exists(branch->refname))
 763                         die(_("branch '%s' does not exist"), branch->name);
 764
 765                 /*
 766                  * create_branch takes care of setting up the tracking
 767                  * info and making sure new_upstream is correct
 768                  */
 769                 create_branch(branch->name, new_upstream, 0, 0, 0, quiet, BRANCH_TRACK_OVERRIDE);
 770         } else if (unset_upstream) {
 771                 struct branch *branch = branch_get(argv[0]);
 772                 struct strbuf buf = STRBUF_INIT;
 773
 774                 if (argc > 1)
 775                         die(_("too many arguments to unset upstream"));
 776
 777                 if (!branch) {
 778                         if (!argc || !strcmp(argv[0], "HEAD"))
 779                                 die(_("could not unset upstream of HEAD when "
 780                                       "it does not point to any branch."));
 781                         die(_("no such branch '%s'"), argv[0]);
 782                 }
 783
 784                 if (!branch_has_merge_config(branch))
 785                         die(_("Branch '%s' has no upstream information"), branch->name);
 786
 787                 strbuf_addf(&buf, "branch.%s.remote", branch->name);
 788                 git_config_set_multivar(buf.buf, NULL, NULL, 1);
 789                 strbuf_reset(&buf);
 790                 strbuf_addf(&buf, "branch.%s.merge", branch->name);
 791                 git_config_set_multivar(buf.buf, NULL, NULL, 1);
 792                 strbuf_release(&buf);
 793         } else if (argc > 0 && argc <= 2) {
 794                 struct branch *branch = branch_get(argv[0]);
 795
 796                 if (!strcmp(argv[0], "HEAD"))
 797                         die(_("it does not make sense to create 'HEAD' manually"));
 798
 799                 if (!branch)
 800                         die(_("no such branch '%s'"), argv[0]);
 801
 802                 if (filter.kind != FILTER_REFS_BRANCHES)
 803                         die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
 804
 805                 if (track == BRANCH_TRACK_OVERRIDE)
 806                         die(_("the '--set-upstream' option is no longer supported. Please use '--track' or '--set-upstream-to' instead."));
 807
 808                 create_branch(argv[0], (argc == 2) ? argv[1] : head,
 809                               force, reflog, 0, quiet, track);
 810
 811         } else
 812                 usage_with_options(builtin_branch_usage, options);
 813
 814         return 0;
 815 }