Merge branch 'cb/maint-rev-list-verify-object'
[git] / 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         void *reference_name_to_free = NULL;
108         int merged;
109
110         if (kind == REF_LOCAL_BRANCH) {
111                 struct branch *branch = branch_get(name);
112                 unsigned char sha1[20];
113
114                 if (branch &&
115                     branch->merge &&
116                     branch->merge[0] &&
117                     branch->merge[0]->dst &&
118                     (reference_name = reference_name_to_free =
119                      resolve_refdup(branch->merge[0]->dst, sha1, 1, NULL)) != NULL)
120                         reference_rev = lookup_commit_reference(sha1);
121         }
122         if (!reference_rev)
123                 reference_rev = head_rev;
124
125         merged = in_merge_bases(rev, &reference_rev, 1);
126
127         /*
128          * After the safety valve is fully redefined to "check with
129          * upstream, if any, otherwise with HEAD", we should just
130          * return the result of the in_merge_bases() above without
131          * any of the following code, but during the transition period,
132          * a gentle reminder is in order.
133          */
134         if ((head_rev != reference_rev) &&
135             in_merge_bases(rev, &head_rev, 1) != merged) {
136                 if (merged)
137                         warning(_("deleting branch '%s' that has been merged to\n"
138                                 "         '%s', but not yet merged to HEAD."),
139                                 name, reference_name);
140                 else
141                         warning(_("not deleting branch '%s' that is not yet merged to\n"
142                                 "         '%s', even though it is merged to HEAD."),
143                                 name, reference_name);
144         }
145         free(reference_name_to_free);
146         return merged;
147 }
148
149 static int delete_branches(int argc, const char **argv, int force, int kinds)
150 {
151         struct commit *rev, *head_rev = NULL;
152         unsigned char sha1[20];
153         char *name = NULL;
154         const char *fmt, *remote;
155         int i;
156         int ret = 0;
157         struct strbuf bname = STRBUF_INIT;
158
159         switch (kinds) {
160         case REF_REMOTE_BRANCH:
161                 fmt = "refs/remotes/%s";
162                 /* TRANSLATORS: This is "remote " in "remote branch '%s' not found" */
163                 remote = _("remote ");
164                 force = 1;
165                 break;
166         case REF_LOCAL_BRANCH:
167                 fmt = "refs/heads/%s";
168                 remote = "";
169                 break;
170         default:
171                 die(_("cannot use -a with -d"));
172         }
173
174         if (!force) {
175                 head_rev = lookup_commit_reference(head_sha1);
176                 if (!head_rev)
177                         die(_("Couldn't look up commit object for HEAD"));
178         }
179         for (i = 0; i < argc; i++, strbuf_release(&bname)) {
180                 strbuf_branchname(&bname, argv[i]);
181                 if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
182                         error(_("Cannot delete the branch '%s' "
183                               "which you are currently on."), bname.buf);
184                         ret = 1;
185                         continue;
186                 }
187
188                 free(name);
189
190                 name = xstrdup(mkpath(fmt, bname.buf));
191                 if (read_ref(name, sha1)) {
192                         error(_("%sbranch '%s' not found."),
193                                         remote, bname.buf);
194                         ret = 1;
195                         continue;
196                 }
197
198                 rev = lookup_commit_reference(sha1);
199                 if (!rev) {
200                         error(_("Couldn't look up commit object for '%s'"), name);
201                         ret = 1;
202                         continue;
203                 }
204
205                 if (!force && !branch_merged(kinds, bname.buf, rev, head_rev)) {
206                         error(_("The branch '%s' is not fully merged.\n"
207                               "If you are sure you want to delete it, "
208                               "run 'git branch -D %s'."), bname.buf, bname.buf);
209                         ret = 1;
210                         continue;
211                 }
212
213                 if (delete_ref(name, sha1, 0)) {
214                         error(_("Error deleting %sbranch '%s'"), remote,
215                               bname.buf);
216                         ret = 1;
217                 } else {
218                         struct strbuf buf = STRBUF_INIT;
219                         printf(_("Deleted %sbranch %s (was %s).\n"), remote,
220                                bname.buf,
221                                find_unique_abbrev(sha1, DEFAULT_ABBREV));
222                         strbuf_addf(&buf, "branch.%s", bname.buf);
223                         if (git_config_rename_section(buf.buf, NULL) < 0)
224                                 warning(_("Update of config-file failed"));
225                         strbuf_release(&buf);
226                 }
227         }
228
229         free(name);
230
231         return(ret);
232 }
233
234 struct ref_item {
235         char *name;
236         char *dest;
237         unsigned int kind, len;
238         struct commit *commit;
239 };
240
241 struct ref_list {
242         struct rev_info revs;
243         int index, alloc, maxwidth, verbose, abbrev;
244         struct ref_item *list;
245         struct commit_list *with_commit;
246         int kinds;
247 };
248
249 static char *resolve_symref(const char *src, const char *prefix)
250 {
251         unsigned char sha1[20];
252         int flag;
253         const char *dst, *cp;
254
255         dst = resolve_ref_unsafe(src, sha1, 0, &flag);
256         if (!(dst && (flag & REF_ISSYMREF)))
257                 return NULL;
258         if (prefix && (cp = skip_prefix(dst, prefix)))
259                 dst = cp;
260         return xstrdup(dst);
261 }
262
263 struct append_ref_cb {
264         struct ref_list *ref_list;
265         const char **pattern;
266         int ret;
267 };
268
269 static int match_patterns(const char **pattern, const char *refname)
270 {
271         if (!*pattern)
272                 return 1; /* no pattern always matches */
273         while (*pattern) {
274                 if (!fnmatch(*pattern, refname, 0))
275                         return 1;
276                 pattern++;
277         }
278         return 0;
279 }
280
281 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
282 {
283         struct append_ref_cb *cb = (struct append_ref_cb *)(cb_data);
284         struct ref_list *ref_list = cb->ref_list;
285         struct ref_item *newitem;
286         struct commit *commit;
287         int kind, i;
288         const char *prefix, *orig_refname = refname;
289
290         static struct {
291                 int kind;
292                 const char *prefix;
293                 int pfxlen;
294         } ref_kind[] = {
295                 { REF_LOCAL_BRANCH, "refs/heads/", 11 },
296                 { REF_REMOTE_BRANCH, "refs/remotes/", 13 },
297         };
298
299         /* Detect kind */
300         for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
301                 prefix = ref_kind[i].prefix;
302                 if (strncmp(refname, prefix, ref_kind[i].pfxlen))
303                         continue;
304                 kind = ref_kind[i].kind;
305                 refname += ref_kind[i].pfxlen;
306                 break;
307         }
308         if (ARRAY_SIZE(ref_kind) <= i)
309                 return 0;
310
311         /* Don't add types the caller doesn't want */
312         if ((kind & ref_list->kinds) == 0)
313                 return 0;
314
315         if (!match_patterns(cb->pattern, refname))
316                 return 0;
317
318         commit = NULL;
319         if (ref_list->verbose || ref_list->with_commit || merge_filter != NO_FILTER) {
320                 commit = lookup_commit_reference_gently(sha1, 1);
321                 if (!commit) {
322                         cb->ret = error(_("branch '%s' does not point at a commit"), refname);
323                         return 0;
324                 }
325
326                 /* Filter with with_commit if specified */
327                 if (!is_descendant_of(commit, ref_list->with_commit))
328                         return 0;
329
330                 if (merge_filter != NO_FILTER)
331                         add_pending_object(&ref_list->revs,
332                                            (struct object *)commit, refname);
333         }
334
335         ALLOC_GROW(ref_list->list, ref_list->index + 1, ref_list->alloc);
336
337         /* Record the new item */
338         newitem = &(ref_list->list[ref_list->index++]);
339         newitem->name = xstrdup(refname);
340         newitem->kind = kind;
341         newitem->commit = commit;
342         newitem->len = strlen(refname);
343         newitem->dest = resolve_symref(orig_refname, prefix);
344         /* adjust for "remotes/" */
345         if (newitem->kind == REF_REMOTE_BRANCH &&
346             ref_list->kinds != REF_REMOTE_BRANCH)
347                 newitem->len += 8;
348         if (newitem->len > ref_list->maxwidth)
349                 ref_list->maxwidth = newitem->len;
350
351         return 0;
352 }
353
354 static void free_ref_list(struct ref_list *ref_list)
355 {
356         int i;
357
358         for (i = 0; i < ref_list->index; i++) {
359                 free(ref_list->list[i].name);
360                 free(ref_list->list[i].dest);
361         }
362         free(ref_list->list);
363 }
364
365 static int ref_cmp(const void *r1, const void *r2)
366 {
367         struct ref_item *c1 = (struct ref_item *)(r1);
368         struct ref_item *c2 = (struct ref_item *)(r2);
369
370         if (c1->kind != c2->kind)
371                 return c1->kind - c2->kind;
372         return strcmp(c1->name, c2->name);
373 }
374
375 static void fill_tracking_info(struct strbuf *stat, const char *branch_name,
376                 int show_upstream_ref)
377 {
378         int ours, theirs;
379         struct branch *branch = branch_get(branch_name);
380
381         if (!stat_tracking_info(branch, &ours, &theirs)) {
382                 if (branch && branch->merge && branch->merge[0]->dst &&
383                     show_upstream_ref)
384                         strbuf_addf(stat, "[%s] ",
385                             shorten_unambiguous_ref(branch->merge[0]->dst, 0));
386                 return;
387         }
388
389         strbuf_addch(stat, '[');
390         if (show_upstream_ref)
391                 strbuf_addf(stat, "%s: ",
392                         shorten_unambiguous_ref(branch->merge[0]->dst, 0));
393         if (!ours)
394                 strbuf_addf(stat, _("behind %d] "), theirs);
395         else if (!theirs)
396                 strbuf_addf(stat, _("ahead %d] "), ours);
397         else
398                 strbuf_addf(stat, _("ahead %d, behind %d] "), ours, theirs);
399 }
400
401 static int matches_merge_filter(struct commit *commit)
402 {
403         int is_merged;
404
405         if (merge_filter == NO_FILTER)
406                 return 1;
407
408         is_merged = !!(commit->object.flags & UNINTERESTING);
409         return (is_merged == (merge_filter == SHOW_MERGED));
410 }
411
412 static void add_verbose_info(struct strbuf *out, struct ref_item *item,
413                              int verbose, int abbrev)
414 {
415         struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
416         const char *sub = " **** invalid ref ****";
417         struct commit *commit = item->commit;
418
419         if (commit && !parse_commit(commit)) {
420                 pp_commit_easy(CMIT_FMT_ONELINE, commit, &subject);
421                 sub = subject.buf;
422         }
423
424         if (item->kind == REF_LOCAL_BRANCH)
425                 fill_tracking_info(&stat, item->name, verbose > 1);
426
427         strbuf_addf(out, " %s %s%s",
428                 find_unique_abbrev(item->commit->object.sha1, abbrev),
429                 stat.buf, sub);
430         strbuf_release(&stat);
431         strbuf_release(&subject);
432 }
433
434 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
435                            int abbrev, int current, char *prefix)
436 {
437         char c;
438         int color;
439         struct commit *commit = item->commit;
440         struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
441
442         if (!matches_merge_filter(commit))
443                 return;
444
445         switch (item->kind) {
446         case REF_LOCAL_BRANCH:
447                 color = BRANCH_COLOR_LOCAL;
448                 break;
449         case REF_REMOTE_BRANCH:
450                 color = BRANCH_COLOR_REMOTE;
451                 break;
452         default:
453                 color = BRANCH_COLOR_PLAIN;
454                 break;
455         }
456
457         c = ' ';
458         if (current) {
459                 c = '*';
460                 color = BRANCH_COLOR_CURRENT;
461         }
462
463         strbuf_addf(&name, "%s%s", prefix, item->name);
464         if (verbose)
465                 strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
466                             maxwidth, name.buf,
467                             branch_get_color(BRANCH_COLOR_RESET));
468         else
469                 strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
470                             name.buf, branch_get_color(BRANCH_COLOR_RESET));
471
472         if (item->dest)
473                 strbuf_addf(&out, " -> %s", item->dest);
474         else if (verbose)
475                 /* " f7c0c00 [ahead 58, behind 197] vcs-svn: drop obj_pool.h" */
476                 add_verbose_info(&out, item, verbose, abbrev);
477         printf("%s\n", out.buf);
478         strbuf_release(&name);
479         strbuf_release(&out);
480 }
481
482 static int calc_maxwidth(struct ref_list *refs)
483 {
484         int i, w = 0;
485         for (i = 0; i < refs->index; i++) {
486                 if (!matches_merge_filter(refs->list[i].commit))
487                         continue;
488                 if (refs->list[i].len > w)
489                         w = refs->list[i].len;
490         }
491         return w;
492 }
493
494
495 static void show_detached(struct ref_list *ref_list)
496 {
497         struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
498
499         if (head_commit && is_descendant_of(head_commit, ref_list->with_commit)) {
500                 struct ref_item item;
501                 item.name = xstrdup(_("(no branch)"));
502                 item.len = strlen(item.name);
503                 item.kind = REF_LOCAL_BRANCH;
504                 item.dest = NULL;
505                 item.commit = head_commit;
506                 if (item.len > ref_list->maxwidth)
507                         ref_list->maxwidth = item.len;
508                 print_ref_item(&item, ref_list->maxwidth, ref_list->verbose, ref_list->abbrev, 1, "");
509                 free(item.name);
510         }
511 }
512
513 static int print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit, const char **pattern)
514 {
515         int i;
516         struct append_ref_cb cb;
517         struct ref_list ref_list;
518
519         memset(&ref_list, 0, sizeof(ref_list));
520         ref_list.kinds = kinds;
521         ref_list.verbose = verbose;
522         ref_list.abbrev = abbrev;
523         ref_list.with_commit = with_commit;
524         if (merge_filter != NO_FILTER)
525                 init_revisions(&ref_list.revs, NULL);
526         cb.ref_list = &ref_list;
527         cb.pattern = pattern;
528         cb.ret = 0;
529         for_each_rawref(append_ref, &cb);
530         if (merge_filter != NO_FILTER) {
531                 struct commit *filter;
532                 filter = lookup_commit_reference_gently(merge_filter_ref, 0);
533                 filter->object.flags |= UNINTERESTING;
534                 add_pending_object(&ref_list.revs,
535                                    (struct object *) filter, "");
536                 ref_list.revs.limited = 1;
537                 prepare_revision_walk(&ref_list.revs);
538                 if (verbose)
539                         ref_list.maxwidth = calc_maxwidth(&ref_list);
540         }
541
542         qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
543
544         detached = (detached && (kinds & REF_LOCAL_BRANCH));
545         if (detached && match_patterns(pattern, "HEAD"))
546                 show_detached(&ref_list);
547
548         for (i = 0; i < ref_list.index; i++) {
549                 int current = !detached &&
550                         (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
551                         !strcmp(ref_list.list[i].name, head);
552                 char *prefix = (kinds != REF_REMOTE_BRANCH &&
553                                 ref_list.list[i].kind == REF_REMOTE_BRANCH)
554                                 ? "remotes/" : "";
555                 print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
556                                abbrev, current, prefix);
557         }
558
559         free_ref_list(&ref_list);
560
561         if (cb.ret)
562                 error(_("some refs could not be read"));
563
564         return cb.ret;
565 }
566
567 static void rename_branch(const char *oldname, const char *newname, int force)
568 {
569         struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
570         struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
571         int recovery = 0;
572         int clobber_head_ok;
573
574         if (!oldname)
575                 die(_("cannot rename the current branch while not on any."));
576
577         if (strbuf_check_branch_ref(&oldref, oldname)) {
578                 /*
579                  * Bad name --- this could be an attempt to rename a
580                  * ref that we used to allow to be created by accident.
581                  */
582                 if (ref_exists(oldref.buf))
583                         recovery = 1;
584                 else
585                         die(_("Invalid branch name: '%s'"), oldname);
586         }
587
588         /*
589          * A command like "git branch -M currentbranch currentbranch" cannot
590          * cause the worktree to become inconsistent with HEAD, so allow it.
591          */
592         clobber_head_ok = !strcmp(oldname, newname);
593
594         validate_new_branchname(newname, &newref, force, clobber_head_ok);
595
596         strbuf_addf(&logmsg, "Branch: renamed %s to %s",
597                  oldref.buf, newref.buf);
598
599         if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
600                 die(_("Branch rename failed"));
601         strbuf_release(&logmsg);
602
603         if (recovery)
604                 warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
605
606         /* no need to pass logmsg here as HEAD didn't really move */
607         if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
608                 die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
609
610         strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
611         strbuf_release(&oldref);
612         strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
613         strbuf_release(&newref);
614         if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
615                 die(_("Branch is renamed, but update of config-file failed"));
616         strbuf_release(&oldsection);
617         strbuf_release(&newsection);
618 }
619
620 static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
621 {
622         merge_filter = ((opt->long_name[0] == 'n')
623                         ? SHOW_NOT_MERGED
624                         : SHOW_MERGED);
625         if (unset)
626                 merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
627         if (!arg)
628                 arg = "HEAD";
629         if (get_sha1(arg, merge_filter_ref))
630                 die(_("malformed object name %s"), arg);
631         return 0;
632 }
633
634 static const char edit_description[] = "BRANCH_DESCRIPTION";
635
636 static int edit_branch_description(const char *branch_name)
637 {
638         FILE *fp;
639         int status;
640         struct strbuf buf = STRBUF_INIT;
641         struct strbuf name = STRBUF_INIT;
642
643         read_branch_desc(&buf, branch_name);
644         if (!buf.len || buf.buf[buf.len-1] != '\n')
645                 strbuf_addch(&buf, '\n');
646         strbuf_addf(&buf,
647                     "# Please edit the description for the branch\n"
648                     "#   %s\n"
649                     "# Lines starting with '#' will be stripped.\n",
650                     branch_name);
651         fp = fopen(git_path(edit_description), "w");
652         if ((fwrite(buf.buf, 1, buf.len, fp) < buf.len) || fclose(fp)) {
653                 strbuf_release(&buf);
654                 return error(_("could not write branch description template: %s\n"),
655                              strerror(errno));
656         }
657         strbuf_reset(&buf);
658         if (launch_editor(git_path(edit_description), &buf, NULL)) {
659                 strbuf_release(&buf);
660                 return -1;
661         }
662         stripspace(&buf, 1);
663
664         strbuf_addf(&name, "branch.%s.description", branch_name);
665         status = git_config_set(name.buf, buf.buf);
666         strbuf_release(&name);
667         strbuf_release(&buf);
668
669         return status;
670 }
671
672 int cmd_branch(int argc, const char **argv, const char *prefix)
673 {
674         int delete = 0, rename = 0, force_create = 0, list = 0;
675         int verbose = 0, abbrev = -1, detached = 0;
676         int reflog = 0, edit_description = 0;
677         enum branch_track track;
678         int kinds = REF_LOCAL_BRANCH;
679         struct commit_list *with_commit = NULL;
680
681         struct option options[] = {
682                 OPT_GROUP("Generic options"),
683                 OPT__VERBOSE(&verbose,
684                         "show hash and subject, give twice for upstream branch"),
685                 OPT_SET_INT('t', "track",  &track, "set up tracking mode (see git-pull(1))",
686                         BRANCH_TRACK_EXPLICIT),
687                 OPT_SET_INT( 0, "set-upstream",  &track, "change upstream info",
688                         BRANCH_TRACK_OVERRIDE),
689                 OPT__COLOR(&branch_use_color, "use colored output"),
690                 OPT_SET_INT('r', "remotes",     &kinds, "act on remote-tracking branches",
691                         REF_REMOTE_BRANCH),
692                 {
693                         OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
694                         "print only branches that contain the commit",
695                         PARSE_OPT_LASTARG_DEFAULT,
696                         parse_opt_with_commit, (intptr_t)"HEAD",
697                 },
698                 {
699                         OPTION_CALLBACK, 0, "with", &with_commit, "commit",
700                         "print only branches that contain the commit",
701                         PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
702                         parse_opt_with_commit, (intptr_t) "HEAD",
703                 },
704                 OPT__ABBREV(&abbrev),
705
706                 OPT_GROUP("Specific git-branch actions:"),
707                 OPT_SET_INT('a', "all", &kinds, "list both remote-tracking and local branches",
708                         REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
709                 OPT_BIT('d', "delete", &delete, "delete fully merged branch", 1),
710                 OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
711                 OPT_BIT('m', "move", &rename, "move/rename a branch and its reflog", 1),
712                 OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
713                 OPT_BOOLEAN(0, "list", &list, "list branch names"),
714                 OPT_BOOLEAN('l', "create-reflog", &reflog, "create the branch's reflog"),
715                 OPT_BOOLEAN(0, "edit-description", &edit_description,
716                             "edit the description for the branch"),
717                 OPT__FORCE(&force_create, "force creation (when already exists)"),
718                 {
719                         OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
720                         "commit", "print only not merged branches",
721                         PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
722                         opt_parse_merge_filter, (intptr_t) "HEAD",
723                 },
724                 {
725                         OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
726                         "commit", "print only merged branches",
727                         PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
728                         opt_parse_merge_filter, (intptr_t) "HEAD",
729                 },
730                 OPT_END(),
731         };
732
733         if (argc == 2 && !strcmp(argv[1], "-h"))
734                 usage_with_options(builtin_branch_usage, options);
735
736         git_config(git_branch_config, NULL);
737
738         track = git_branch_track;
739
740         head = resolve_refdup("HEAD", head_sha1, 0, NULL);
741         if (!head)
742                 die(_("Failed to resolve HEAD as a valid ref."));
743         if (!strcmp(head, "HEAD")) {
744                 detached = 1;
745         } else {
746                 if (prefixcmp(head, "refs/heads/"))
747                         die(_("HEAD not found below refs/heads!"));
748                 head += 11;
749         }
750         hashcpy(merge_filter_ref, head_sha1);
751
752         argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
753                              0);
754
755         if (!delete && !rename && !edit_description && argc == 0)
756                 list = 1;
757
758         if (!!delete + !!rename + !!force_create + !!list > 1)
759                 usage_with_options(builtin_branch_usage, options);
760
761         if (abbrev == -1)
762                 abbrev = DEFAULT_ABBREV;
763
764         if (delete)
765                 return delete_branches(argc, argv, delete > 1, kinds);
766         else if (list)
767                 return print_ref_list(kinds, detached, verbose, abbrev,
768                                       with_commit, argv);
769         else if (edit_description) {
770                 const char *branch_name;
771                 struct strbuf branch_ref = STRBUF_INIT;
772
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
782                 strbuf_addf(&branch_ref, "refs/heads/%s", branch_name);
783                 if (!ref_exists(branch_ref.buf)) {
784                         strbuf_release(&branch_ref);
785
786                         if (!argc)
787                                 return error("No commit on branch '%s' yet.",
788                                              branch_name);
789                         else
790                                 return error("No such branch '%s'.", branch_name);
791                 }
792                 strbuf_release(&branch_ref);
793
794                 if (edit_branch_description(branch_name))
795                         return 1;
796         } else if (rename) {
797                 if (argc == 1)
798                         rename_branch(head, argv[0], rename > 1);
799                 else if (argc == 2)
800                         rename_branch(argv[0], argv[1], rename > 1);
801                 else
802                         usage_with_options(builtin_branch_usage, options);
803         } else if (argc > 0 && argc <= 2) {
804                 if (kinds != REF_LOCAL_BRANCH)
805                         die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
806                 create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
807                               force_create, reflog, 0, track);
808         } else
809                 usage_with_options(builtin_branch_usage, options);
810
811         return 0;
812 }