Sync with maint
[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 #include "string-list.h"
19 #include "column.h"
20 #include "utf8.h"
21 #include "wt-status.h"
22 #include "ref-filter.h"
23 #include "worktree.h"
24
25 static const char * const builtin_branch_usage[] = {
26         N_("git branch [<options>] [-r | -a] [--merged | --no-merged]"),
27         N_("git branch [<options>] [-l] [-f] <branch-name> [<start-point>]"),
28         N_("git branch [<options>] [-r] (-d | -D) <branch-name>..."),
29         N_("git branch [<options>] (-m | -M) [<old-branch>] <new-branch>"),
30         N_("git branch [<options>] [-r | -a] [--points-at]"),
31         NULL
32 };
33
34 static const char *head;
35 static unsigned char head_sha1[20];
36
37 static int branch_use_color = -1;
38 static char branch_colors[][COLOR_MAXLEN] = {
39         GIT_COLOR_RESET,
40         GIT_COLOR_NORMAL,       /* PLAIN */
41         GIT_COLOR_RED,          /* REMOTE */
42         GIT_COLOR_NORMAL,       /* LOCAL */
43         GIT_COLOR_GREEN,        /* CURRENT */
44         GIT_COLOR_BLUE,         /* UPSTREAM */
45 };
46 enum color_branch {
47         BRANCH_COLOR_RESET = 0,
48         BRANCH_COLOR_PLAIN = 1,
49         BRANCH_COLOR_REMOTE = 2,
50         BRANCH_COLOR_LOCAL = 3,
51         BRANCH_COLOR_CURRENT = 4,
52         BRANCH_COLOR_UPSTREAM = 5
53 };
54
55 static struct string_list output = STRING_LIST_INIT_DUP;
56 static unsigned int colopts;
57
58 static int parse_branch_color_slot(const char *slot)
59 {
60         if (!strcasecmp(slot, "plain"))
61                 return BRANCH_COLOR_PLAIN;
62         if (!strcasecmp(slot, "reset"))
63                 return BRANCH_COLOR_RESET;
64         if (!strcasecmp(slot, "remote"))
65                 return BRANCH_COLOR_REMOTE;
66         if (!strcasecmp(slot, "local"))
67                 return BRANCH_COLOR_LOCAL;
68         if (!strcasecmp(slot, "current"))
69                 return BRANCH_COLOR_CURRENT;
70         if (!strcasecmp(slot, "upstream"))
71                 return BRANCH_COLOR_UPSTREAM;
72         return -1;
73 }
74
75 static int git_branch_config(const char *var, const char *value, void *cb)
76 {
77         const char *slot_name;
78
79         if (starts_with(var, "column."))
80                 return git_column_config(var, value, "branch", &colopts);
81         if (!strcmp(var, "color.branch")) {
82                 branch_use_color = git_config_colorbool(var, value);
83                 return 0;
84         }
85         if (skip_prefix(var, "color.branch.", &slot_name)) {
86                 int slot = parse_branch_color_slot(slot_name);
87                 if (slot < 0)
88                         return 0;
89                 if (!value)
90                         return config_error_nonbool(var);
91                 return color_parse(value, branch_colors[slot]);
92         }
93         return git_color_default_config(var, value, cb);
94 }
95
96 static const char *branch_get_color(enum color_branch ix)
97 {
98         if (want_color(branch_use_color))
99                 return branch_colors[ix];
100         return "";
101 }
102
103 static int branch_merged(int kind, const char *name,
104                          struct commit *rev, struct commit *head_rev)
105 {
106         /*
107          * This checks whether the merge bases of branch and HEAD (or
108          * the other branch this branch builds upon) contains the
109          * branch, which means that the branch has already been merged
110          * safely to HEAD (or the other branch).
111          */
112         struct commit *reference_rev = NULL;
113         const char *reference_name = NULL;
114         void *reference_name_to_free = NULL;
115         int merged;
116
117         if (kind == FILTER_REFS_BRANCHES) {
118                 struct branch *branch = branch_get(name);
119                 const char *upstream = branch_get_upstream(branch, NULL);
120                 unsigned char sha1[20];
121
122                 if (upstream &&
123                     (reference_name = reference_name_to_free =
124                      resolve_refdup(upstream, RESOLVE_REF_READING,
125                                     sha1, NULL)) != NULL)
126                         reference_rev = lookup_commit_reference(sha1);
127         }
128         if (!reference_rev)
129                 reference_rev = head_rev;
130
131         merged = in_merge_bases(rev, reference_rev);
132
133         /*
134          * After the safety valve is fully redefined to "check with
135          * upstream, if any, otherwise with HEAD", we should just
136          * return the result of the in_merge_bases() above without
137          * any of the following code, but during the transition period,
138          * a gentle reminder is in order.
139          */
140         if ((head_rev != reference_rev) &&
141             in_merge_bases(rev, head_rev) != merged) {
142                 if (merged)
143                         warning(_("deleting branch '%s' that has been merged to\n"
144                                 "         '%s', but not yet merged to HEAD."),
145                                 name, reference_name);
146                 else
147                         warning(_("not deleting branch '%s' that is not yet merged to\n"
148                                 "         '%s', even though it is merged to HEAD."),
149                                 name, reference_name);
150         }
151         free(reference_name_to_free);
152         return merged;
153 }
154
155 static int check_branch_commit(const char *branchname, const char *refname,
156                                const unsigned char *sha1, struct commit *head_rev,
157                                int kinds, int force)
158 {
159         struct commit *rev = lookup_commit_reference(sha1);
160         if (!rev) {
161                 error(_("Couldn't look up commit object for '%s'"), refname);
162                 return -1;
163         }
164         if (!force && !branch_merged(kinds, branchname, rev, head_rev)) {
165                 error(_("The branch '%s' is not fully merged.\n"
166                       "If you are sure you want to delete it, "
167                       "run 'git branch -D %s'."), branchname, branchname);
168                 return -1;
169         }
170         return 0;
171 }
172
173 static void delete_branch_config(const char *branchname)
174 {
175         struct strbuf buf = STRBUF_INIT;
176         strbuf_addf(&buf, "branch.%s", branchname);
177         if (git_config_rename_section(buf.buf, NULL) < 0)
178                 warning(_("Update of config-file failed"));
179         strbuf_release(&buf);
180 }
181
182 static int delete_branches(int argc, const char **argv, int force, int kinds,
183                            int quiet)
184 {
185         struct commit *head_rev = NULL;
186         unsigned char sha1[20];
187         char *name = NULL;
188         const char *fmt;
189         int i;
190         int ret = 0;
191         int remote_branch = 0;
192         struct strbuf bname = STRBUF_INIT;
193
194         switch (kinds) {
195         case FILTER_REFS_REMOTES:
196                 fmt = "refs/remotes/%s";
197                 /* For subsequent UI messages */
198                 remote_branch = 1;
199
200                 force = 1;
201                 break;
202         case FILTER_REFS_BRANCHES:
203                 fmt = "refs/heads/%s";
204                 break;
205         default:
206                 die(_("cannot use -a with -d"));
207         }
208
209         if (!force) {
210                 head_rev = lookup_commit_reference(head_sha1);
211                 if (!head_rev)
212                         die(_("Couldn't look up commit object for HEAD"));
213         }
214         for (i = 0; i < argc; i++, strbuf_release(&bname)) {
215                 char *target = NULL;
216                 int flags = 0;
217
218                 strbuf_branchname(&bname, argv[i]);
219                 free(name);
220                 name = mkpathdup(fmt, bname.buf);
221
222                 if (kinds == FILTER_REFS_BRANCHES) {
223                         const struct worktree *wt =
224                                 find_shared_symref("HEAD", name);
225                         if (wt) {
226                                 error(_("Cannot delete branch '%s' "
227                                         "checked out at '%s'"),
228                                       bname.buf, wt->path);
229                                 ret = 1;
230                                 continue;
231                         }
232                 }
233
234                 target = resolve_refdup(name,
235                                         RESOLVE_REF_READING
236                                         | RESOLVE_REF_NO_RECURSE
237                                         | RESOLVE_REF_ALLOW_BAD_NAME,
238                                         sha1, &flags);
239                 if (!target) {
240                         error(remote_branch
241                               ? _("remote-tracking branch '%s' not found.")
242                               : _("branch '%s' not found."), bname.buf);
243                         ret = 1;
244                         continue;
245                 }
246
247                 if (!(flags & (REF_ISSYMREF|REF_ISBROKEN)) &&
248                     check_branch_commit(bname.buf, name, sha1, head_rev, kinds,
249                                         force)) {
250                         ret = 1;
251                         goto next;
252                 }
253
254                 if (delete_ref(name, is_null_sha1(sha1) ? NULL : sha1,
255                                REF_NODEREF)) {
256                         error(remote_branch
257                               ? _("Error deleting remote-tracking branch '%s'")
258                               : _("Error deleting branch '%s'"),
259                               bname.buf);
260                         ret = 1;
261                         goto next;
262                 }
263                 if (!quiet) {
264                         printf(remote_branch
265                                ? _("Deleted remote-tracking branch %s (was %s).\n")
266                                : _("Deleted branch %s (was %s).\n"),
267                                bname.buf,
268                                (flags & REF_ISBROKEN) ? "broken"
269                                : (flags & REF_ISSYMREF) ? target
270                                : find_unique_abbrev(sha1, DEFAULT_ABBREV));
271                 }
272                 delete_branch_config(bname.buf);
273
274         next:
275                 free(target);
276         }
277
278         free(name);
279
280         return(ret);
281 }
282
283 static void fill_tracking_info(struct strbuf *stat, const char *branch_name,
284                 int show_upstream_ref)
285 {
286         int ours, theirs;
287         char *ref = NULL;
288         struct branch *branch = branch_get(branch_name);
289         const char *upstream;
290         struct strbuf fancy = STRBUF_INIT;
291         int upstream_is_gone = 0;
292         int added_decoration = 1;
293
294         if (stat_tracking_info(branch, &ours, &theirs, &upstream) < 0) {
295                 if (!upstream)
296                         return;
297                 upstream_is_gone = 1;
298         }
299
300         if (show_upstream_ref) {
301                 ref = shorten_unambiguous_ref(upstream, 0);
302                 if (want_color(branch_use_color))
303                         strbuf_addf(&fancy, "%s%s%s",
304                                         branch_get_color(BRANCH_COLOR_UPSTREAM),
305                                         ref, branch_get_color(BRANCH_COLOR_RESET));
306                 else
307                         strbuf_addstr(&fancy, ref);
308         }
309
310         if (upstream_is_gone) {
311                 if (show_upstream_ref)
312                         strbuf_addf(stat, _("[%s: gone]"), fancy.buf);
313                 else
314                         added_decoration = 0;
315         } else if (!ours && !theirs) {
316                 if (show_upstream_ref)
317                         strbuf_addf(stat, _("[%s]"), fancy.buf);
318                 else
319                         added_decoration = 0;
320         } else if (!ours) {
321                 if (show_upstream_ref)
322                         strbuf_addf(stat, _("[%s: behind %d]"), fancy.buf, theirs);
323                 else
324                         strbuf_addf(stat, _("[behind %d]"), theirs);
325
326         } else if (!theirs) {
327                 if (show_upstream_ref)
328                         strbuf_addf(stat, _("[%s: ahead %d]"), fancy.buf, ours);
329                 else
330                         strbuf_addf(stat, _("[ahead %d]"), ours);
331         } else {
332                 if (show_upstream_ref)
333                         strbuf_addf(stat, _("[%s: ahead %d, behind %d]"),
334                                     fancy.buf, ours, theirs);
335                 else
336                         strbuf_addf(stat, _("[ahead %d, behind %d]"),
337                                     ours, theirs);
338         }
339         strbuf_release(&fancy);
340         if (added_decoration)
341                 strbuf_addch(stat, ' ');
342         free(ref);
343 }
344
345 static void add_verbose_info(struct strbuf *out, struct ref_array_item *item,
346                              struct ref_filter *filter, const char *refname)
347 {
348         struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
349         const char *sub = _(" **** invalid ref ****");
350         struct commit *commit = item->commit;
351
352         if (!parse_commit(commit)) {
353                 pp_commit_easy(CMIT_FMT_ONELINE, commit, &subject);
354                 sub = subject.buf;
355         }
356
357         if (item->kind == FILTER_REFS_BRANCHES)
358                 fill_tracking_info(&stat, refname, filter->verbose > 1);
359
360         strbuf_addf(out, " %s %s%s",
361                 find_unique_abbrev(item->commit->object.oid.hash, filter->abbrev),
362                 stat.buf, sub);
363         strbuf_release(&stat);
364         strbuf_release(&subject);
365 }
366
367 static char *get_head_description(void)
368 {
369         struct strbuf desc = STRBUF_INIT;
370         struct wt_status_state state;
371         memset(&state, 0, sizeof(state));
372         wt_status_get_state(&state, 1);
373         if (state.rebase_in_progress ||
374             state.rebase_interactive_in_progress)
375                 strbuf_addf(&desc, _("(no branch, rebasing %s)"),
376                             state.branch);
377         else if (state.bisect_in_progress)
378                 strbuf_addf(&desc, _("(no branch, bisect started on %s)"),
379                             state.branch);
380         else if (state.detached_from) {
381                 if (state.detached_at)
382                         /* TRANSLATORS: make sure this matches
383                            "HEAD detached at " in wt-status.c */
384                         strbuf_addf(&desc, _("(HEAD detached at %s)"),
385                                 state.detached_from);
386                 else
387                         /* TRANSLATORS: make sure this matches
388                            "HEAD detached from " in wt-status.c */
389                         strbuf_addf(&desc, _("(HEAD detached from %s)"),
390                                 state.detached_from);
391         }
392         else
393                 strbuf_addstr(&desc, _("(no branch)"));
394         free(state.branch);
395         free(state.onto);
396         free(state.detached_from);
397         return strbuf_detach(&desc, NULL);
398 }
399
400 static void format_and_print_ref_item(struct ref_array_item *item, int maxwidth,
401                                       struct ref_filter *filter, const char *remote_prefix)
402 {
403         char c;
404         int current = 0;
405         int color;
406         struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
407         const char *prefix_to_show = "";
408         const char *prefix_to_skip = NULL;
409         const char *desc = item->refname;
410         char *to_free = NULL;
411
412         switch (item->kind) {
413         case FILTER_REFS_BRANCHES:
414                 prefix_to_skip = "refs/heads/";
415                 skip_prefix(desc, prefix_to_skip, &desc);
416                 if (!filter->detached && !strcmp(desc, head))
417                         current = 1;
418                 else
419                         color = BRANCH_COLOR_LOCAL;
420                 break;
421         case FILTER_REFS_REMOTES:
422                 prefix_to_skip = "refs/remotes/";
423                 skip_prefix(desc, prefix_to_skip, &desc);
424                 color = BRANCH_COLOR_REMOTE;
425                 prefix_to_show = remote_prefix;
426                 break;
427         case FILTER_REFS_DETACHED_HEAD:
428                 desc = to_free = get_head_description();
429                 current = 1;
430                 break;
431         default:
432                 color = BRANCH_COLOR_PLAIN;
433                 break;
434         }
435
436         c = ' ';
437         if (current) {
438                 c = '*';
439                 color = BRANCH_COLOR_CURRENT;
440         }
441
442         strbuf_addf(&name, "%s%s", prefix_to_show, desc);
443         if (filter->verbose) {
444                 int utf8_compensation = strlen(name.buf) - utf8_strwidth(name.buf);
445                 strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
446                             maxwidth + utf8_compensation, name.buf,
447                             branch_get_color(BRANCH_COLOR_RESET));
448         } else
449                 strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
450                             name.buf, branch_get_color(BRANCH_COLOR_RESET));
451
452         if (item->symref) {
453                 const char *symref = item->symref;
454                 if (prefix_to_skip)
455                         skip_prefix(symref, prefix_to_skip, &symref);
456                 strbuf_addf(&out, " -> %s", symref);
457         }
458         else if (filter->verbose)
459                 /* " f7c0c00 [ahead 58, behind 197] vcs-svn: drop obj_pool.h" */
460                 add_verbose_info(&out, item, filter, desc);
461         if (column_active(colopts)) {
462                 assert(!filter->verbose && "--column and --verbose are incompatible");
463                 string_list_append(&output, out.buf);
464         } else {
465                 printf("%s\n", out.buf);
466         }
467         strbuf_release(&name);
468         strbuf_release(&out);
469         free(to_free);
470 }
471
472 static int calc_maxwidth(struct ref_array *refs, int remote_bonus)
473 {
474         int i, max = 0;
475         for (i = 0; i < refs->nr; i++) {
476                 struct ref_array_item *it = refs->items[i];
477                 const char *desc = it->refname;
478                 int w;
479
480                 skip_prefix(it->refname, "refs/heads/", &desc);
481                 skip_prefix(it->refname, "refs/remotes/", &desc);
482                 w = utf8_strwidth(desc);
483
484                 if (it->kind == FILTER_REFS_REMOTES)
485                         w += remote_bonus;
486                 if (w > max)
487                         max = w;
488         }
489         return max;
490 }
491
492 static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sorting)
493 {
494         int i;
495         struct ref_array array;
496         int maxwidth = 0;
497         const char *remote_prefix = "";
498
499         /*
500          * If we are listing more than just remote branches,
501          * then remote branches will have a "remotes/" prefix.
502          * We need to account for this in the width.
503          */
504         if (filter->kind != FILTER_REFS_REMOTES)
505                 remote_prefix = "remotes/";
506
507         memset(&array, 0, sizeof(array));
508
509         verify_ref_format("%(refname)%(symref)");
510         filter_refs(&array, filter, filter->kind | FILTER_REFS_INCLUDE_BROKEN);
511
512         if (filter->verbose)
513                 maxwidth = calc_maxwidth(&array, strlen(remote_prefix));
514
515         ref_array_sort(sorting, &array);
516
517         for (i = 0; i < array.nr; i++)
518                 format_and_print_ref_item(array.items[i], maxwidth, filter, remote_prefix);
519
520         ref_array_clear(&array);
521 }
522
523 static void reject_rebase_or_bisect_branch(const char *target)
524 {
525         struct worktree **worktrees = get_worktrees(0);
526         int i;
527
528         for (i = 0; worktrees[i]; i++) {
529                 struct worktree *wt = worktrees[i];
530
531                 if (!wt->is_detached)
532                         continue;
533
534                 if (is_worktree_being_rebased(wt, target))
535                         die(_("Branch %s is being rebased at %s"),
536                             target, wt->path);
537
538                 if (is_worktree_being_bisected(wt, target))
539                         die(_("Branch %s is being bisected at %s"),
540                             target, wt->path);
541         }
542
543         free_worktrees(worktrees);
544 }
545
546 static void rename_branch(const char *oldname, const char *newname, int force)
547 {
548         struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
549         struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
550         int recovery = 0;
551         int clobber_head_ok;
552
553         if (!oldname)
554                 die(_("cannot rename the current branch while not on any."));
555
556         if (strbuf_check_branch_ref(&oldref, oldname)) {
557                 /*
558                  * Bad name --- this could be an attempt to rename a
559                  * ref that we used to allow to be created by accident.
560                  */
561                 if (ref_exists(oldref.buf))
562                         recovery = 1;
563                 else
564                         die(_("Invalid branch name: '%s'"), oldname);
565         }
566
567         /*
568          * A command like "git branch -M currentbranch currentbranch" cannot
569          * cause the worktree to become inconsistent with HEAD, so allow it.
570          */
571         clobber_head_ok = !strcmp(oldname, newname);
572
573         validate_new_branchname(newname, &newref, force, clobber_head_ok);
574
575         reject_rebase_or_bisect_branch(oldref.buf);
576
577         strbuf_addf(&logmsg, "Branch: renamed %s to %s",
578                  oldref.buf, newref.buf);
579
580         if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
581                 die(_("Branch rename failed"));
582         strbuf_release(&logmsg);
583
584         if (recovery)
585                 warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
586
587         if (replace_each_worktree_head_symref(oldref.buf, newref.buf))
588                 die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
589
590         strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
591         strbuf_release(&oldref);
592         strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
593         strbuf_release(&newref);
594         if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
595                 die(_("Branch is renamed, but update of config-file failed"));
596         strbuf_release(&oldsection);
597         strbuf_release(&newsection);
598 }
599
600 static const char edit_description[] = "BRANCH_DESCRIPTION";
601
602 static int edit_branch_description(const char *branch_name)
603 {
604         struct strbuf buf = STRBUF_INIT;
605         struct strbuf name = STRBUF_INIT;
606
607         read_branch_desc(&buf, branch_name);
608         if (!buf.len || buf.buf[buf.len-1] != '\n')
609                 strbuf_addch(&buf, '\n');
610         strbuf_commented_addf(&buf,
611                     _("Please edit the description for the branch\n"
612                       "  %s\n"
613                       "Lines starting with '%c' will be stripped.\n"),
614                     branch_name, comment_line_char);
615         write_file_buf(git_path(edit_description), buf.buf, buf.len);
616         strbuf_reset(&buf);
617         if (launch_editor(git_path(edit_description), &buf, NULL)) {
618                 strbuf_release(&buf);
619                 return -1;
620         }
621         strbuf_stripspace(&buf, 1);
622
623         strbuf_addf(&name, "branch.%s.description", branch_name);
624         git_config_set(name.buf, buf.len ? buf.buf : NULL);
625         strbuf_release(&name);
626         strbuf_release(&buf);
627
628         return 0;
629 }
630
631 int cmd_branch(int argc, const char **argv, const char *prefix)
632 {
633         int delete = 0, rename = 0, force = 0, list = 0;
634         int reflog = 0, edit_description = 0;
635         int quiet = 0, unset_upstream = 0;
636         const char *new_upstream = NULL;
637         enum branch_track track;
638         struct ref_filter filter;
639         int icase = 0;
640         static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
641
642         struct option options[] = {
643                 OPT_GROUP(N_("Generic options")),
644                 OPT__VERBOSE(&filter.verbose,
645                         N_("show hash and subject, give twice for upstream branch")),
646                 OPT__QUIET(&quiet, N_("suppress informational messages")),
647                 OPT_SET_INT('t', "track",  &track, N_("set up tracking mode (see git-pull(1))"),
648                         BRANCH_TRACK_EXPLICIT),
649                 OPT_SET_INT( 0, "set-upstream",  &track, N_("change upstream info"),
650                         BRANCH_TRACK_OVERRIDE),
651                 OPT_STRING('u', "set-upstream-to", &new_upstream, N_("upstream"), N_("change the upstream info")),
652                 OPT_BOOL(0, "unset-upstream", &unset_upstream, N_("Unset the upstream info")),
653                 OPT__COLOR(&branch_use_color, N_("use colored output")),
654                 OPT_SET_INT('r', "remotes",     &filter.kind, N_("act on remote-tracking branches"),
655                         FILTER_REFS_REMOTES),
656                 OPT_CONTAINS(&filter.with_commit, N_("print only branches that contain the commit")),
657                 OPT_WITH(&filter.with_commit, N_("print only branches that contain the commit")),
658                 OPT__ABBREV(&filter.abbrev),
659
660                 OPT_GROUP(N_("Specific git-branch actions:")),
661                 OPT_SET_INT('a', "all", &filter.kind, N_("list both remote-tracking and local branches"),
662                         FILTER_REFS_REMOTES | FILTER_REFS_BRANCHES),
663                 OPT_BIT('d', "delete", &delete, N_("delete fully merged branch"), 1),
664                 OPT_BIT('D', NULL, &delete, N_("delete branch (even if not merged)"), 2),
665                 OPT_BIT('m', "move", &rename, N_("move/rename a branch and its reflog"), 1),
666                 OPT_BIT('M', NULL, &rename, N_("move/rename a branch, even if target exists"), 2),
667                 OPT_BOOL(0, "list", &list, N_("list branch names")),
668                 OPT_BOOL('l', "create-reflog", &reflog, N_("create the branch's reflog")),
669                 OPT_BOOL(0, "edit-description", &edit_description,
670                          N_("edit the description for the branch")),
671                 OPT__FORCE(&force, N_("force creation, move/rename, deletion")),
672                 OPT_MERGED(&filter, N_("print only branches that are merged")),
673                 OPT_NO_MERGED(&filter, N_("print only branches that are not merged")),
674                 OPT_COLUMN(0, "column", &colopts, N_("list branches in columns")),
675                 OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
676                              N_("field name to sort on"), &parse_opt_ref_sorting),
677                 {
678                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
679                         N_("print only branches of the object"), 0, parse_opt_object_name
680                 },
681                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
682                 OPT_END(),
683         };
684
685         memset(&filter, 0, sizeof(filter));
686         filter.kind = FILTER_REFS_BRANCHES;
687         filter.abbrev = -1;
688
689         if (argc == 2 && !strcmp(argv[1], "-h"))
690                 usage_with_options(builtin_branch_usage, options);
691
692         git_config(git_branch_config, NULL);
693
694         track = git_branch_track;
695
696         head = resolve_refdup("HEAD", 0, head_sha1, NULL);
697         if (!head)
698                 die(_("Failed to resolve HEAD as a valid ref."));
699         if (!strcmp(head, "HEAD"))
700                 filter.detached = 1;
701         else if (!skip_prefix(head, "refs/heads/", &head))
702                 die(_("HEAD not found below refs/heads!"));
703
704         argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
705                              0);
706
707         if (!delete && !rename && !edit_description && !new_upstream && !unset_upstream && argc == 0)
708                 list = 1;
709
710         if (filter.with_commit || filter.merge != REF_FILTER_MERGED_NONE || filter.points_at.nr)
711                 list = 1;
712
713         if (!!delete + !!rename + !!new_upstream +
714             list + unset_upstream > 1)
715                 usage_with_options(builtin_branch_usage, options);
716
717         if (filter.abbrev == -1)
718                 filter.abbrev = DEFAULT_ABBREV;
719         filter.ignore_case = icase;
720
721         finalize_colopts(&colopts, -1);
722         if (filter.verbose) {
723                 if (explicitly_enable_column(colopts))
724                         die(_("--column and --verbose are incompatible"));
725                 colopts = 0;
726         }
727
728         if (force) {
729                 delete *= 2;
730                 rename *= 2;
731         }
732
733         if (delete) {
734                 if (!argc)
735                         die(_("branch name required"));
736                 return delete_branches(argc, argv, delete > 1, filter.kind, quiet);
737         } else if (list) {
738                 /*  git branch --local also shows HEAD when it is detached */
739                 if ((filter.kind & FILTER_REFS_BRANCHES) && filter.detached)
740                         filter.kind |= FILTER_REFS_DETACHED_HEAD;
741                 filter.name_patterns = argv;
742                 /*
743                  * If no sorting parameter is given then we default to sorting
744                  * by 'refname'. This would give us an alphabetically sorted
745                  * array with the 'HEAD' ref at the beginning followed by
746                  * local branches 'refs/heads/...' and finally remote-tacking
747                  * branches 'refs/remotes/...'.
748                  */
749                 if (!sorting)
750                         sorting = ref_default_sorting();
751                 sorting->ignore_case = icase;
752                 print_ref_list(&filter, sorting);
753                 print_columns(&output, colopts, NULL);
754                 string_list_clear(&output, 0);
755                 return 0;
756         }
757         else if (edit_description) {
758                 const char *branch_name;
759                 struct strbuf branch_ref = STRBUF_INIT;
760
761                 if (!argc) {
762                         if (filter.detached)
763                                 die(_("Cannot give description to detached HEAD"));
764                         branch_name = head;
765                 } else if (argc == 1)
766                         branch_name = argv[0];
767                 else
768                         die(_("cannot edit description of more than one branch"));
769
770                 strbuf_addf(&branch_ref, "refs/heads/%s", branch_name);
771                 if (!ref_exists(branch_ref.buf)) {
772                         strbuf_release(&branch_ref);
773
774                         if (!argc)
775                                 return error(_("No commit on branch '%s' yet."),
776                                              branch_name);
777                         else
778                                 return error(_("No branch named '%s'."),
779                                              branch_name);
780                 }
781                 strbuf_release(&branch_ref);
782
783                 if (edit_branch_description(branch_name))
784                         return 1;
785         } else if (rename) {
786                 if (!argc)
787                         die(_("branch name required"));
788                 else if (argc == 1)
789                         rename_branch(head, argv[0], rename > 1);
790                 else if (argc == 2)
791                         rename_branch(argv[0], argv[1], rename > 1);
792                 else
793                         die(_("too many branches for a rename operation"));
794         } else if (new_upstream) {
795                 struct branch *branch = branch_get(argv[0]);
796
797                 if (argc > 1)
798                         die(_("too many branches to set new upstream"));
799
800                 if (!branch) {
801                         if (!argc || !strcmp(argv[0], "HEAD"))
802                                 die(_("could not set upstream of HEAD to %s when "
803                                       "it does not point to any branch."),
804                                     new_upstream);
805                         die(_("no such branch '%s'"), argv[0]);
806                 }
807
808                 if (!ref_exists(branch->refname))
809                         die(_("branch '%s' does not exist"), branch->name);
810
811                 /*
812                  * create_branch takes care of setting up the tracking
813                  * info and making sure new_upstream is correct
814                  */
815                 create_branch(branch->name, new_upstream, 0, 0, 0, quiet, BRANCH_TRACK_OVERRIDE);
816         } else if (unset_upstream) {
817                 struct branch *branch = branch_get(argv[0]);
818                 struct strbuf buf = STRBUF_INIT;
819
820                 if (argc > 1)
821                         die(_("too many branches to unset upstream"));
822
823                 if (!branch) {
824                         if (!argc || !strcmp(argv[0], "HEAD"))
825                                 die(_("could not unset upstream of HEAD when "
826                                       "it does not point to any branch."));
827                         die(_("no such branch '%s'"), argv[0]);
828                 }
829
830                 if (!branch_has_merge_config(branch))
831                         die(_("Branch '%s' has no upstream information"), branch->name);
832
833                 strbuf_addf(&buf, "branch.%s.remote", branch->name);
834                 git_config_set_multivar(buf.buf, NULL, NULL, 1);
835                 strbuf_reset(&buf);
836                 strbuf_addf(&buf, "branch.%s.merge", branch->name);
837                 git_config_set_multivar(buf.buf, NULL, NULL, 1);
838                 strbuf_release(&buf);
839         } else if (argc > 0 && argc <= 2) {
840                 struct branch *branch = branch_get(argv[0]);
841                 int branch_existed = 0, remote_tracking = 0;
842                 struct strbuf buf = STRBUF_INIT;
843
844                 if (!strcmp(argv[0], "HEAD"))
845                         die(_("it does not make sense to create 'HEAD' manually"));
846
847                 if (!branch)
848                         die(_("no such branch '%s'"), argv[0]);
849
850                 if (filter.kind != FILTER_REFS_BRANCHES)
851                         die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
852
853                 if (track == BRANCH_TRACK_OVERRIDE)
854                         fprintf(stderr, _("The --set-upstream flag is deprecated and will be removed. Consider using --track or --set-upstream-to\n"));
855
856                 strbuf_addf(&buf, "refs/remotes/%s", branch->name);
857                 remote_tracking = ref_exists(buf.buf);
858                 strbuf_release(&buf);
859
860                 branch_existed = ref_exists(branch->refname);
861                 create_branch(argv[0], (argc == 2) ? argv[1] : head,
862                               force, reflog, 0, quiet, track);
863
864                 /*
865                  * We only show the instructions if the user gave us
866                  * one branch which doesn't exist locally, but is the
867                  * name of a remote-tracking branch.
868                  */
869                 if (argc == 1 && track == BRANCH_TRACK_OVERRIDE &&
870                     !branch_existed && remote_tracking) {
871                         fprintf(stderr, _("\nIf you wanted to make '%s' track '%s', do this:\n\n"), head, branch->name);
872                         fprintf(stderr, "    git branch -d %s\n", branch->name);
873                         fprintf(stderr, "    git branch --set-upstream-to %s\n", branch->name);
874                 }
875
876         } else
877                 usage_with_options(builtin_branch_usage, options);
878
879         return 0;
880 }