git.oblomov.eu Git - git/blob - 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         return -1;
  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);
  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
  89 static const char *branch_get_color(enum color_branch ix)
  90 {
  91         if (want_color(branch_use_color))
  92                 return branch_colors[ix];
  93         return "";
  94 }
  95
  96 static int branch_merged(int kind, const char *name,
  97                          struct commit *rev, struct commit *head_rev)
  98 {
  99         /*
 100          * This checks whether the merge bases of branch and HEAD (or
 101          * the other branch this branch builds upon) contains the
 102          * branch, which means that the branch has already been merged
 103          * safely to HEAD (or the other branch).
 104          */
 105         struct commit *reference_rev = NULL;
 106         const char *reference_name = NULL;
 107         int merged;
 108
 109         if (kind == REF_LOCAL_BRANCH) {
 110                 struct branch *branch = branch_get(name);
 111                 unsigned char sha1[20];
 112
 113                 if (branch &&
 114                     branch->merge &&
 115                     branch->merge[0] &&
 116                     branch->merge[0]->dst &&
 117                     (reference_name =
 118                      resolve_ref(branch->merge[0]->dst, sha1, 1, NULL)) != NULL) {
 119                         reference_name = xstrdup(reference_name);
 120                         reference_rev = lookup_commit_reference(sha1);
 121                 }
 122         }
 123         if (!reference_rev)
 124                 reference_rev = head_rev;
 125
 126         merged = in_merge_bases(rev, &reference_rev, 1);
 127
 128         /*
 129          * After the safety valve is fully redefined to "check with
 130          * upstream, if any, otherwise with HEAD", we should just
 131          * return the result of the in_merge_bases() above without
 132          * any of the following code, but during the transition period,
 133          * a gentle reminder is in order.
 134          */
 135         if ((head_rev != reference_rev) &&
 136             in_merge_bases(rev, &head_rev, 1) != merged) {
 137                 if (merged)
 138                         warning(_("deleting branch '%s' that has been merged to\n"
 139                                 "         '%s', but not yet merged to HEAD."),
 140                                 name, reference_name);
 141                 else
 142                         warning(_("not deleting branch '%s' that is not yet merged to\n"
 143                                 "         '%s', even though it is merged to HEAD."),
 144                                 name, reference_name);
 145         }
 146         free((char *)reference_name);
 147         return merged;
 148 }
 149
 150 static int delete_branches(int argc, const char **argv, int force, int kinds)
 151 {
 152         struct commit *rev, *head_rev = NULL;
 153         unsigned char sha1[20];
 154         char *name = NULL;
 155         const char *fmt, *remote;
 156         int i;
 157         int ret = 0;
 158         struct strbuf bname = STRBUF_INIT;
 159
 160         switch (kinds) {
 161         case REF_REMOTE_BRANCH:
 162                 fmt = "refs/remotes/%s";
 163                 /* TRANSLATORS: This is "remote " in "remote branch '%s' not found" */
 164                 remote = _("remote ");
 165                 force = 1;
 166                 break;
 167         case REF_LOCAL_BRANCH:
 168                 fmt = "refs/heads/%s";
 169                 remote = "";
 170                 break;
 171         default:
 172                 die(_("cannot use -a with -d"));
 173         }
 174
 175         if (!force) {
 176                 head_rev = lookup_commit_reference(head_sha1);
 177                 if (!head_rev)
 178                         die(_("Couldn't look up commit object for HEAD"));
 179         }
 180         for (i = 0; i < argc; i++, strbuf_release(&bname)) {
 181                 strbuf_branchname(&bname, argv[i]);
 182                 if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
 183                         error(_("Cannot delete the branch '%s' "
 184                               "which you are currently on."), bname.buf);
 185                         ret = 1;
 186                         continue;
 187                 }
 188
 189                 free(name);
 190
 191                 name = xstrdup(mkpath(fmt, bname.buf));
 192                 if (read_ref(name, sha1)) {
 193                         error(_("%sbranch '%s' not found."),
 194                                         remote, bname.buf);
 195                         ret = 1;
 196                         continue;
 197                 }
 198
 199                 rev = lookup_commit_reference(sha1);
 200                 if (!rev) {
 201                         error(_("Couldn't look up commit object for '%s'"), name);
 202                         ret = 1;
 203                         continue;
 204                 }
 205
 206                 if (!force && !branch_merged(kinds, bname.buf, rev, head_rev)) {
 207                         error(_("The branch '%s' is not fully merged.\n"
 208                               "If you are sure you want to delete it, "
 209                               "run 'git branch -D %s'."), bname.buf, bname.buf);
 210                         ret = 1;
 211                         continue;
 212                 }
 213
 214                 if (delete_ref(name, sha1, 0)) {
 215                         error(_("Error deleting %sbranch '%s'"), remote,
 216                               bname.buf);
 217                         ret = 1;
 218                 } else {
 219                         struct strbuf buf = STRBUF_INIT;
 220                         printf(_("Deleted %sbranch %s (was %s).\n"), remote,
 221                                bname.buf,
 222                                find_unique_abbrev(sha1, DEFAULT_ABBREV));
 223                         strbuf_addf(&buf, "branch.%s", bname.buf);
 224                         if (git_config_rename_section(buf.buf, NULL) < 0)
 225                                 warning(_("Update of config-file failed"));
 226                         strbuf_release(&buf);
 227                 }
 228         }
 229
 230         free(name);
 231
 232         return(ret);
 233 }
 234
 235 struct ref_item {
 236         char *name;
 237         char *dest;
 238         unsigned int kind, len;
 239         struct commit *commit;
 240 };
 241
 242 struct ref_list {
 243         struct rev_info revs;
 244         int index, alloc, maxwidth, verbose, abbrev;
 245         struct ref_item *list;
 246         struct commit_list *with_commit;
 247         int kinds;
 248 };
 249
 250 static char *resolve_symref(const char *src, const char *prefix)
 251 {
 252         unsigned char sha1[20];
 253         int flag;
 254         const char *dst, *cp;
 255
 256         dst = resolve_ref(src, sha1, 0, &flag);
 257         if (!(dst && (flag & REF_ISSYMREF)))
 258                 return NULL;
 259         if (prefix && (cp = skip_prefix(dst, prefix)))
 260                 dst = cp;
 261         return xstrdup(dst);
 262 }
 263
 264 struct append_ref_cb {
 265         struct ref_list *ref_list;
 266         const char **pattern;
 267         int ret;
 268 };
 269
 270 static int match_patterns(const char **pattern, const char *refname)
 271 {
 272         if (!*pattern)
 273                 return 1; /* no pattern always matches */
 274         while (*pattern) {
 275                 if (!fnmatch(*pattern, refname, 0))
 276                         return 1;
 277                 pattern++;
 278         }
 279         return 0;
 280 }
 281
 282 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 283 {
 284         struct append_ref_cb *cb = (struct append_ref_cb *)(cb_data);
 285         struct ref_list *ref_list = cb->ref_list;
 286         struct ref_item *newitem;
 287         struct commit *commit;
 288         int kind, i;
 289         const char *prefix, *orig_refname = refname;
 290
 291         static struct {
 292                 int kind;
 293                 const char *prefix;
 294                 int pfxlen;
 295         } ref_kind[] = {
 296                 { REF_LOCAL_BRANCH, "refs/heads/", 11 },
 297                 { REF_REMOTE_BRANCH, "refs/remotes/", 13 },
 298         };
 299
 300         /* Detect kind */
 301         for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
 302                 prefix = ref_kind[i].prefix;
 303                 if (strncmp(refname, prefix, ref_kind[i].pfxlen))
 304                         continue;
 305                 kind = ref_kind[i].kind;
 306                 refname += ref_kind[i].pfxlen;
 307                 break;
 308         }
 309         if (ARRAY_SIZE(ref_kind) <= i)
 310                 return 0;
 311
 312         /* Don't add types the caller doesn't want */
 313         if ((kind & ref_list->kinds) == 0)
 314                 return 0;
 315
 316         if (!match_patterns(cb->pattern, refname))
 317                 return 0;
 318
 319         commit = NULL;
 320         if (ref_list->verbose || ref_list->with_commit || merge_filter != NO_FILTER) {
 321                 commit = lookup_commit_reference_gently(sha1, 1);
 322                 if (!commit) {
 323                         cb->ret = error(_("branch '%s' does not point at a commit"), refname);
 324                         return 0;
 325                 }
 326
 327                 /* Filter with with_commit if specified */
 328                 if (!is_descendant_of(commit, ref_list->with_commit))
 329                         return 0;
 330
 331                 if (merge_filter != NO_FILTER)
 332                         add_pending_object(&ref_list->revs,
 333                                            (struct object *)commit, refname);
 334         }
 335
 336         ALLOC_GROW(ref_list->list, ref_list->index + 1, ref_list->alloc);
 337
 338         /* Record the new item */
 339         newitem = &(ref_list->list[ref_list->index++]);
 340         newitem->name = xstrdup(refname);
 341         newitem->kind = kind;
 342         newitem->commit = commit;
 343         newitem->len = strlen(refname);
 344         newitem->dest = resolve_symref(orig_refname, prefix);
 345         /* adjust for "remotes/" */
 346         if (newitem->kind == REF_REMOTE_BRANCH &&
 347             ref_list->kinds != REF_REMOTE_BRANCH)
 348                 newitem->len += 8;
 349         if (newitem->len > ref_list->maxwidth)
 350                 ref_list->maxwidth = newitem->len;
 351
 352         return 0;
 353 }
 354
 355 static void free_ref_list(struct ref_list *ref_list)
 356 {
 357         int i;
 358
 359         for (i = 0; i < ref_list->index; i++) {
 360                 free(ref_list->list[i].name);
 361                 free(ref_list->list[i].dest);
 362         }
 363         free(ref_list->list);
 364 }
 365
 366 static int ref_cmp(const void *r1, const void *r2)
 367 {
 368         struct ref_item *c1 = (struct ref_item *)(r1);
 369         struct ref_item *c2 = (struct ref_item *)(r2);
 370
 371         if (c1->kind != c2->kind)
 372                 return c1->kind - c2->kind;
 373         return strcmp(c1->name, c2->name);
 374 }
 375
 376 static void fill_tracking_info(struct strbuf *stat, const char *branch_name,
 377                 int show_upstream_ref)
 378 {
 379         int ours, theirs;
 380         struct branch *branch = branch_get(branch_name);
 381
 382         if (!stat_tracking_info(branch, &ours, &theirs)) {
 383                 if (branch && branch->merge && branch->merge[0]->dst &&
 384                     show_upstream_ref)
 385                         strbuf_addf(stat, "[%s] ",
 386                             shorten_unambiguous_ref(branch->merge[0]->dst, 0));
 387                 return;
 388         }
 389
 390         strbuf_addch(stat, '[');
 391         if (show_upstream_ref)
 392                 strbuf_addf(stat, "%s: ",
 393                         shorten_unambiguous_ref(branch->merge[0]->dst, 0));
 394         if (!ours)
 395                 strbuf_addf(stat, _("behind %d] "), theirs);
 396         else if (!theirs)
 397                 strbuf_addf(stat, _("ahead %d] "), ours);
 398         else
 399                 strbuf_addf(stat, _("ahead %d, behind %d] "), ours, theirs);
 400 }
 401
 402 static int matches_merge_filter(struct commit *commit)
 403 {
 404         int is_merged;
 405
 406         if (merge_filter == NO_FILTER)
 407                 return 1;
 408
 409         is_merged = !!(commit->object.flags & UNINTERESTING);
 410         return (is_merged == (merge_filter == SHOW_MERGED));
 411 }
 412
 413 static void add_verbose_info(struct strbuf *out, struct ref_item *item,
 414                              int verbose, int abbrev)
 415 {
 416         struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
 417         const char *sub = " **** invalid ref ****";
 418         struct commit *commit = item->commit;
 419
 420         if (commit && !parse_commit(commit)) {
 421                 pp_commit_easy(CMIT_FMT_ONELINE, commit, &subject);
 422                 sub = subject.buf;
 423         }
 424
 425         if (item->kind == REF_LOCAL_BRANCH)
 426                 fill_tracking_info(&stat, item->name, verbose > 1);
 427
 428         strbuf_addf(out, " %s %s%s",
 429                 find_unique_abbrev(item->commit->object.sha1, abbrev),
 430                 stat.buf, sub);
 431         strbuf_release(&stat);
 432         strbuf_release(&subject);
 433 }
 434
 435 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 436                            int abbrev, int current, char *prefix)
 437 {
 438         char c;
 439         int color;
 440         struct commit *commit = item->commit;
 441         struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
 442
 443         if (!matches_merge_filter(commit))
 444                 return;
 445
 446         switch (item->kind) {
 447         case REF_LOCAL_BRANCH:
 448                 color = BRANCH_COLOR_LOCAL;
 449                 break;
 450         case REF_REMOTE_BRANCH:
 451                 color = BRANCH_COLOR_REMOTE;
 452                 break;
 453         default:
 454                 color = BRANCH_COLOR_PLAIN;
 455                 break;
 456         }
 457
 458         c = ' ';
 459         if (current) {
 460                 c = '*';
 461                 color = BRANCH_COLOR_CURRENT;
 462         }
 463
 464         strbuf_addf(&name, "%s%s", prefix, item->name);
 465         if (verbose)
 466                 strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
 467                             maxwidth, name.buf,
 468                             branch_get_color(BRANCH_COLOR_RESET));
 469         else
 470                 strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
 471                             name.buf, branch_get_color(BRANCH_COLOR_RESET));
 472
 473         if (item->dest)
 474                 strbuf_addf(&out, " -> %s", item->dest);
 475         else if (verbose)
 476                 /* " f7c0c00 [ahead 58, behind 197] vcs-svn: drop obj_pool.h" */
 477                 add_verbose_info(&out, item, verbose, abbrev);
 478         printf("%s\n", out.buf);
 479         strbuf_release(&name);
 480         strbuf_release(&out);
 481 }
 482
 483 static int calc_maxwidth(struct ref_list *refs)
 484 {
 485         int i, w = 0;
 486         for (i = 0; i < refs->index; i++) {
 487                 if (!matches_merge_filter(refs->list[i].commit))
 488                         continue;
 489                 if (refs->list[i].len > w)
 490                         w = refs->list[i].len;
 491         }
 492         return w;
 493 }
 494
 495
 496 static void show_detached(struct ref_list *ref_list)
 497 {
 498         struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
 499
 500         if (head_commit && is_descendant_of(head_commit, ref_list->with_commit)) {
 501                 struct ref_item item;
 502                 item.name = xstrdup(_("(no branch)"));
 503                 item.len = strlen(item.name);
 504                 item.kind = REF_LOCAL_BRANCH;
 505                 item.dest = NULL;
 506                 item.commit = head_commit;
 507                 if (item.len > ref_list->maxwidth)
 508                         ref_list->maxwidth = item.len;
 509                 print_ref_item(&item, ref_list->maxwidth, ref_list->verbose, ref_list->abbrev, 1, "");
 510                 free(item.name);
 511         }
 512 }
 513
 514 static int print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit, const char **pattern)
 515 {
 516         int i;
 517         struct append_ref_cb cb;
 518         struct ref_list ref_list;
 519
 520         memset(&ref_list, 0, sizeof(ref_list));
 521         ref_list.kinds = kinds;
 522         ref_list.verbose = verbose;
 523         ref_list.abbrev = abbrev;
 524         ref_list.with_commit = with_commit;
 525         if (merge_filter != NO_FILTER)
 526                 init_revisions(&ref_list.revs, NULL);
 527         cb.ref_list = &ref_list;
 528         cb.pattern = pattern;
 529         cb.ret = 0;
 530         for_each_rawref(append_ref, &cb);
 531         if (merge_filter != NO_FILTER) {
 532                 struct commit *filter;
 533                 filter = lookup_commit_reference_gently(merge_filter_ref, 0);
 534                 filter->object.flags |= UNINTERESTING;
 535                 add_pending_object(&ref_list.revs,
 536                                    (struct object *) filter, "");
 537                 ref_list.revs.limited = 1;
 538                 prepare_revision_walk(&ref_list.revs);
 539                 if (verbose)
 540                         ref_list.maxwidth = calc_maxwidth(&ref_list);
 541         }
 542
 543         qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 544
 545         detached = (detached && (kinds & REF_LOCAL_BRANCH));
 546         if (detached && match_patterns(pattern, "HEAD"))
 547                 show_detached(&ref_list);
 548
 549         for (i = 0; i < ref_list.index; i++) {
 550                 int current = !detached &&
 551                         (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
 552                         !strcmp(ref_list.list[i].name, head);
 553                 char *prefix = (kinds != REF_REMOTE_BRANCH &&
 554                                 ref_list.list[i].kind == REF_REMOTE_BRANCH)
 555                                 ? "remotes/" : "";
 556                 print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
 557                                abbrev, current, prefix);
 558         }
 559
 560         free_ref_list(&ref_list);
 561
 562         if (cb.ret)
 563                 error(_("some refs could not be read"));
 564
 565         return cb.ret;
 566 }
 567
 568 static void rename_branch(const char *oldname, const char *newname, int force)
 569 {
 570         struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
 571         struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
 572         int recovery = 0;
 573         int clobber_head_ok;
 574
 575         if (!oldname)
 576                 die(_("cannot rename the current branch while not on any."));
 577
 578         if (strbuf_check_branch_ref(&oldref, oldname)) {
 579                 /*
 580                  * Bad name --- this could be an attempt to rename a
 581                  * ref that we used to allow to be created by accident.
 582                  */
 583                 if (ref_exists(oldref.buf))
 584                         recovery = 1;
 585                 else
 586                         die(_("Invalid branch name: '%s'"), oldname);
 587         }
 588
 589         /*
 590          * A command like "git branch -M currentbranch currentbranch" cannot
 591          * cause the worktree to become inconsistent with HEAD, so allow it.
 592          */
 593         clobber_head_ok = !strcmp(oldname, newname);
 594
 595         validate_new_branchname(newname, &newref, force, clobber_head_ok);
 596
 597         strbuf_addf(&logmsg, "Branch: renamed %s to %s",
 598                  oldref.buf, newref.buf);
 599
 600         if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
 601                 die(_("Branch rename failed"));
 602         strbuf_release(&logmsg);
 603
 604         if (recovery)
 605                 warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
 606
 607         /* no need to pass logmsg here as HEAD didn't really move */
 608         if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
 609                 die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
 610
 611         strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
 612         strbuf_release(&oldref);
 613         strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
 614         strbuf_release(&newref);
 615         if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
 616                 die(_("Branch is renamed, but update of config-file failed"));
 617         strbuf_release(&oldsection);
 618         strbuf_release(&newsection);
 619 }
 620
 621 static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
 622 {
 623         merge_filter = ((opt->long_name[0] == 'n')
 624                         ? SHOW_NOT_MERGED
 625                         : SHOW_MERGED);
 626         if (unset)
 627                 merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
 628         if (!arg)
 629                 arg = "HEAD";
 630         if (get_sha1(arg, merge_filter_ref))
 631                 die(_("malformed object name %s"), arg);
 632         return 0;
 633 }
 634
 635 static const char edit_description[] = "BRANCH_DESCRIPTION";
 636
 637 static int edit_branch_description(const char *branch_name)
 638 {
 639         FILE *fp;
 640         int status;
 641         struct strbuf buf = STRBUF_INIT;
 642         struct strbuf name = STRBUF_INIT;
 643
 644         read_branch_desc(&buf, branch_name);
 645         if (!buf.len || buf.buf[buf.len-1] != '\n')
 646                 strbuf_addch(&buf, '\n');
 647         strbuf_addf(&buf,
 648                     "# Please edit the description for the branch\n"
 649                     "#   %s\n"
 650                     "# Lines starting with '#' will be stripped.\n",
 651                     branch_name);
 652         fp = fopen(git_path(edit_description), "w");
 653         if ((fwrite(buf.buf, 1, buf.len, fp) < buf.len) || fclose(fp)) {
 654                 strbuf_release(&buf);
 655                 return error(_("could not write branch description template: %s\n"),
 656                              strerror(errno));
 657         }
 658         strbuf_reset(&buf);
 659         if (launch_editor(git_path(edit_description), &buf, NULL)) {
 660                 strbuf_release(&buf);
 661                 return -1;
 662         }
 663         stripspace(&buf, 1);
 664
 665         strbuf_addf(&name, "branch.%s.description", branch_name);
 666         status = git_config_set(name.buf, buf.buf);
 667         strbuf_release(&name);
 668         strbuf_release(&buf);
 669
 670         return status;
 671 }
 672
 673 int cmd_branch(int argc, const char **argv, const char *prefix)
 674 {
 675         int delete = 0, rename = 0, force_create = 0, list = 0;
 676         int verbose = 0, abbrev = -1, detached = 0;
 677         int reflog = 0, edit_description = 0;
 678         enum branch_track track;
 679         int kinds = REF_LOCAL_BRANCH;
 680         struct commit_list *with_commit = NULL;
 681
 682         struct option options[] = {
 683                 OPT_GROUP("Generic options"),
 684                 OPT__VERBOSE(&verbose,
 685                         "show hash and subject, give twice for upstream branch"),
 686                 OPT_SET_INT('t', "track",  &track, "set up tracking mode (see git-pull(1))",
 687                         BRANCH_TRACK_EXPLICIT),
 688                 OPT_SET_INT( 0, "set-upstream",  &track, "change upstream info",
 689                         BRANCH_TRACK_OVERRIDE),
 690                 OPT__COLOR(&branch_use_color, "use colored output"),
 691                 OPT_SET_INT('r', "remotes",     &kinds, "act on remote-tracking branches",
 692                         REF_REMOTE_BRANCH),
 693                 {
 694                         OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
 695                         "print only branches that contain the commit",
 696                         PARSE_OPT_LASTARG_DEFAULT,
 697                         parse_opt_with_commit, (intptr_t)"HEAD",
 698                 },
 699                 {
 700                         OPTION_CALLBACK, 0, "with", &with_commit, "commit",
 701                         "print only branches that contain the commit",
 702                         PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
 703                         parse_opt_with_commit, (intptr_t) "HEAD",
 704                 },
 705                 OPT__ABBREV(&abbrev),
 706
 707                 OPT_GROUP("Specific git-branch actions:"),
 708                 OPT_SET_INT('a', "all", &kinds, "list both remote-tracking and local branches",
 709                         REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
 710                 OPT_BIT('d', "delete", &delete, "delete fully merged branch", 1),
 711                 OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
 712                 OPT_BIT('m', "move", &rename, "move/rename a branch and its reflog", 1),
 713                 OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
 714                 OPT_BOOLEAN(0, "list", &list, "list branch names"),
 715                 OPT_BOOLEAN('l', "create-reflog", &reflog, "create the branch's reflog"),
 716                 OPT_BOOLEAN(0, "edit-description", &edit_description,
 717                             "edit the description for the branch"),
 718                 OPT__FORCE(&force_create, "force creation (when already exists)"),
 719                 {
 720                         OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
 721                         "commit", "print only not merged branches",
 722                         PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 723                         opt_parse_merge_filter, (intptr_t) "HEAD",
 724                 },
 725                 {
 726                         OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
 727                         "commit", "print only merged branches",
 728                         PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 729                         opt_parse_merge_filter, (intptr_t) "HEAD",
 730                 },
 731                 OPT_END(),
 732         };
 733
 734         if (argc == 2 && !strcmp(argv[1], "-h"))
 735                 usage_with_options(builtin_branch_usage, options);
 736
 737         git_config(git_branch_config, NULL);
 738
 739         track = git_branch_track;
 740
 741         head = resolve_ref("HEAD", head_sha1, 0, NULL);
 742         if (!head)
 743                 die(_("Failed to resolve HEAD as a valid ref."));
 744         head = xstrdup(head);
 745         if (!strcmp(head, "HEAD")) {
 746                 detached = 1;
 747         } else {
 748                 if (prefixcmp(head, "refs/heads/"))
 749                         die(_("HEAD not found below refs/heads!"));
 750                 head += 11;
 751         }
 752         hashcpy(merge_filter_ref, head_sha1);
 753
 754         argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
 755                              0);
 756
 757         if (!delete && !rename && !edit_description && argc == 0)
 758                 list = 1;
 759
 760         if (!!delete + !!rename + !!force_create + !!list > 1)
 761                 usage_with_options(builtin_branch_usage, options);
 762
 763         if (abbrev == -1)
 764                 abbrev = DEFAULT_ABBREV;
 765
 766         if (delete)
 767                 return delete_branches(argc, argv, delete > 1, kinds);
 768         else if (list)
 769                 return print_ref_list(kinds, detached, verbose, abbrev,
 770                                       with_commit, argv);
 771         else if (edit_description) {
 772                 const char *branch_name;
 773                 if (detached)
 774                         die("Cannot give description to detached HEAD");
 775                 if (!argc)
 776                         branch_name = head;
 777                 else if (argc == 1)
 778                         branch_name = argv[0];
 779                 else
 780                         usage_with_options(builtin_branch_usage, options);
 781                 if (edit_branch_description(branch_name))
 782                         return 1;
 783         } else if (rename) {
 784                 if (argc == 1)
 785                         rename_branch(head, argv[0], rename > 1);
 786                 else if (argc == 2)
 787                         rename_branch(argv[0], argv[1], rename > 1);
 788                 else
 789                         usage_with_options(builtin_branch_usage, options);
 790         } else if (argc > 0 && argc <= 2) {
 791                 if (kinds != REF_LOCAL_BRANCH)
 792                         die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
 793                 create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
 794                               force_create, reflog, 0, track);
 795         } else
 796                 usage_with_options(builtin_branch_usage, options);
 797
 798         return 0;
 799 }