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[git/platforms.git] / builtin-branch.c
blob56a1971d690e32ca1cb0bc2d66ee05be48bfe565
1 /*
2 * Builtin "git branch"
4 * Copyright (c) 2006 Kristian Høgsberg <krh@redhat.com>
5 * Based on git-branch.sh by Junio C Hamano.
6 */
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"
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
27 #define REF_LOCAL_BRANCH 0x01
28 #define REF_REMOTE_BRANCH 0x02
30 static const char *head;
31 static unsigned char head_sha1[20];
33 static int branch_use_color = -1;
34 static char branch_colors[][COLOR_MAXLEN] = {
35 "\033[m", /* reset */
36 "", /* PLAIN (normal) */
37 "\033[31m", /* REMOTE (red) */
38 "", /* LOCAL (normal) */
39 "\033[32m", /* CURRENT (green) */
41 enum color_branch {
42 COLOR_BRANCH_RESET = 0,
43 COLOR_BRANCH_PLAIN = 1,
44 COLOR_BRANCH_REMOTE = 2,
45 COLOR_BRANCH_LOCAL = 3,
46 COLOR_BRANCH_CURRENT = 4,
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];
56 static int parse_branch_color_slot(const char *var, int ofs)
58 if (!strcasecmp(var+ofs, "plain"))
59 return COLOR_BRANCH_PLAIN;
60 if (!strcasecmp(var+ofs, "reset"))
61 return COLOR_BRANCH_RESET;
62 if (!strcasecmp(var+ofs, "remote"))
63 return COLOR_BRANCH_REMOTE;
64 if (!strcasecmp(var+ofs, "local"))
65 return COLOR_BRANCH_LOCAL;
66 if (!strcasecmp(var+ofs, "current"))
67 return COLOR_BRANCH_CURRENT;
68 die("bad config variable '%s'", var);
71 static int git_branch_config(const char *var, const char *value, void *cb)
73 if (!strcmp(var, "color.branch")) {
74 branch_use_color = git_config_colorbool(var, value, -1);
75 return 0;
77 if (!prefixcmp(var, "color.branch.")) {
78 int slot = parse_branch_color_slot(var, 13);
79 if (!value)
80 return config_error_nonbool(var);
81 color_parse(value, var, branch_colors[slot]);
82 return 0;
84 return git_color_default_config(var, value, cb);
87 static const char *branch_get_color(enum color_branch ix)
89 if (branch_use_color > 0)
90 return branch_colors[ix];
91 return "";
94 static int delete_branches(int argc, const char **argv, int force, int kinds)
96 struct commit *rev, *head_rev = head_rev;
97 unsigned char sha1[20];
98 char *name = NULL;
99 const char *fmt, *remote;
100 int i;
101 int ret = 0;
103 switch (kinds) {
104 case REF_REMOTE_BRANCH:
105 fmt = "refs/remotes/%s";
106 remote = "remote ";
107 force = 1;
108 break;
109 case REF_LOCAL_BRANCH:
110 fmt = "refs/heads/%s";
111 remote = "";
112 break;
113 default:
114 die("cannot use -a with -d");
117 if (!force) {
118 head_rev = lookup_commit_reference(head_sha1);
119 if (!head_rev)
120 die("Couldn't look up commit object for HEAD");
122 for (i = 0; i < argc; i++) {
123 if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
124 error("Cannot delete the branch '%s' "
125 "which you are currently on.", argv[i]);
126 ret = 1;
127 continue;
130 free(name);
132 name = xstrdup(mkpath(fmt, argv[i]));
133 if (!resolve_ref(name, sha1, 1, NULL)) {
134 error("%sbranch '%s' not found.",
135 remote, argv[i]);
136 ret = 1;
137 continue;
140 rev = lookup_commit_reference(sha1);
141 if (!rev) {
142 error("Couldn't look up commit object for '%s'", name);
143 ret = 1;
144 continue;
147 /* This checks whether the merge bases of branch and
148 * HEAD contains branch -- which means that the HEAD
149 * contains everything in both.
152 if (!force &&
153 !in_merge_bases(rev, &head_rev, 1)) {
154 error("The branch '%s' is not an ancestor of "
155 "your current HEAD.\n"
156 "If you are sure you want to delete it, "
157 "run 'git branch -D %s'.", argv[i], argv[i]);
158 ret = 1;
159 continue;
162 if (delete_ref(name, sha1, 0)) {
163 error("Error deleting %sbranch '%s'", remote,
164 argv[i]);
165 ret = 1;
166 } else {
167 struct strbuf buf = STRBUF_INIT;
168 printf("Deleted %sbranch %s (%s).\n", remote, argv[i],
169 find_unique_abbrev(sha1, DEFAULT_ABBREV));
170 strbuf_addf(&buf, "branch.%s", argv[i]);
171 if (git_config_rename_section(buf.buf, NULL) < 0)
172 warning("Update of config-file failed");
173 strbuf_release(&buf);
177 free(name);
179 return(ret);
182 struct ref_item {
183 char *name;
184 unsigned int kind;
185 struct commit *commit;
188 struct ref_list {
189 struct rev_info revs;
190 int index, alloc, maxwidth;
191 struct ref_item *list;
192 struct commit_list *with_commit;
193 int kinds;
196 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
198 struct ref_list *ref_list = (struct ref_list*)(cb_data);
199 struct ref_item *newitem;
200 struct commit *commit;
201 int kind;
202 int len;
204 /* Detect kind */
205 if (!prefixcmp(refname, "refs/heads/")) {
206 kind = REF_LOCAL_BRANCH;
207 refname += 11;
208 } else if (!prefixcmp(refname, "refs/remotes/")) {
209 kind = REF_REMOTE_BRANCH;
210 refname += 13;
211 } else
212 return 0;
214 commit = lookup_commit_reference_gently(sha1, 1);
215 if (!commit)
216 return error("branch '%s' does not point at a commit", refname);
218 /* Filter with with_commit if specified */
219 if (!is_descendant_of(commit, ref_list->with_commit))
220 return 0;
222 /* Don't add types the caller doesn't want */
223 if ((kind & ref_list->kinds) == 0)
224 return 0;
226 if (merge_filter != NO_FILTER)
227 add_pending_object(&ref_list->revs,
228 (struct object *)commit, refname);
230 /* Resize buffer */
231 if (ref_list->index >= ref_list->alloc) {
232 ref_list->alloc = alloc_nr(ref_list->alloc);
233 ref_list->list = xrealloc(ref_list->list,
234 ref_list->alloc * sizeof(struct ref_item));
237 /* Record the new item */
238 newitem = &(ref_list->list[ref_list->index++]);
239 newitem->name = xstrdup(refname);
240 newitem->kind = kind;
241 newitem->commit = commit;
242 len = strlen(newitem->name);
243 if (len > ref_list->maxwidth)
244 ref_list->maxwidth = len;
246 return 0;
249 static void free_ref_list(struct ref_list *ref_list)
251 int i;
253 for (i = 0; i < ref_list->index; i++)
254 free(ref_list->list[i].name);
255 free(ref_list->list);
258 static int ref_cmp(const void *r1, const void *r2)
260 struct ref_item *c1 = (struct ref_item *)(r1);
261 struct ref_item *c2 = (struct ref_item *)(r2);
263 if (c1->kind != c2->kind)
264 return c1->kind - c2->kind;
265 return strcmp(c1->name, c2->name);
268 static void fill_tracking_info(struct strbuf *stat, const char *branch_name)
270 int ours, theirs;
271 struct branch *branch = branch_get(branch_name);
273 if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
274 return;
275 if (!ours)
276 strbuf_addf(stat, "[behind %d] ", theirs);
277 else if (!theirs)
278 strbuf_addf(stat, "[ahead %d] ", ours);
279 else
280 strbuf_addf(stat, "[ahead %d, behind %d] ", ours, theirs);
283 static int matches_merge_filter(struct commit *commit)
285 int is_merged;
287 if (merge_filter == NO_FILTER)
288 return 1;
290 is_merged = !!(commit->object.flags & UNINTERESTING);
291 return (is_merged == (merge_filter == SHOW_MERGED));
294 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
295 int abbrev, int current)
297 char c;
298 int color;
299 struct commit *commit = item->commit;
301 if (!matches_merge_filter(commit))
302 return;
304 switch (item->kind) {
305 case REF_LOCAL_BRANCH:
306 color = COLOR_BRANCH_LOCAL;
307 break;
308 case REF_REMOTE_BRANCH:
309 color = COLOR_BRANCH_REMOTE;
310 break;
311 default:
312 color = COLOR_BRANCH_PLAIN;
313 break;
316 c = ' ';
317 if (current) {
318 c = '*';
319 color = COLOR_BRANCH_CURRENT;
322 if (verbose) {
323 struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
324 const char *sub = " **** invalid ref ****";
326 commit = item->commit;
327 if (commit && !parse_commit(commit)) {
328 pretty_print_commit(CMIT_FMT_ONELINE, commit,
329 &subject, 0, NULL, NULL, 0, 0);
330 sub = subject.buf;
333 if (item->kind == REF_LOCAL_BRANCH)
334 fill_tracking_info(&stat, item->name);
336 printf("%c %s%-*s%s %s %s%s\n", c, branch_get_color(color),
337 maxwidth, item->name,
338 branch_get_color(COLOR_BRANCH_RESET),
339 find_unique_abbrev(item->commit->object.sha1, abbrev),
340 stat.buf, sub);
341 strbuf_release(&stat);
342 strbuf_release(&subject);
343 } else {
344 printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
345 branch_get_color(COLOR_BRANCH_RESET));
349 static int calc_maxwidth(struct ref_list *refs)
351 int i, l, w = 0;
352 for (i = 0; i < refs->index; i++) {
353 if (!matches_merge_filter(refs->list[i].commit))
354 continue;
355 l = strlen(refs->list[i].name);
356 if (l > w)
357 w = l;
359 return w;
362 static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
364 int i;
365 struct ref_list ref_list;
366 struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
368 memset(&ref_list, 0, sizeof(ref_list));
369 ref_list.kinds = kinds;
370 ref_list.with_commit = with_commit;
371 if (merge_filter != NO_FILTER)
372 init_revisions(&ref_list.revs, NULL);
373 for_each_ref(append_ref, &ref_list);
374 if (merge_filter != NO_FILTER) {
375 struct commit *filter;
376 filter = lookup_commit_reference_gently(merge_filter_ref, 0);
377 filter->object.flags |= UNINTERESTING;
378 add_pending_object(&ref_list.revs,
379 (struct object *) filter, "");
380 ref_list.revs.limited = 1;
381 prepare_revision_walk(&ref_list.revs);
382 if (verbose)
383 ref_list.maxwidth = calc_maxwidth(&ref_list);
386 qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
388 detached = (detached && (kinds & REF_LOCAL_BRANCH));
389 if (detached && head_commit &&
390 is_descendant_of(head_commit, with_commit)) {
391 struct ref_item item;
392 item.name = xstrdup("(no branch)");
393 item.kind = REF_LOCAL_BRANCH;
394 item.commit = head_commit;
395 if (strlen(item.name) > ref_list.maxwidth)
396 ref_list.maxwidth = strlen(item.name);
397 print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
398 free(item.name);
401 for (i = 0; i < ref_list.index; i++) {
402 int current = !detached &&
403 (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
404 !strcmp(ref_list.list[i].name, head);
405 print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
406 abbrev, current);
409 free_ref_list(&ref_list);
412 static void rename_branch(const char *oldname, const char *newname, int force)
414 struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
415 unsigned char sha1[20];
416 struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
418 if (!oldname)
419 die("cannot rename the current branch while not on any.");
421 strbuf_addf(&oldref, "refs/heads/%s", oldname);
423 if (check_ref_format(oldref.buf))
424 die("Invalid branch name: %s", oldref.buf);
426 strbuf_addf(&newref, "refs/heads/%s", newname);
428 if (check_ref_format(newref.buf))
429 die("Invalid branch name: %s", newref.buf);
431 if (resolve_ref(newref.buf, sha1, 1, NULL) && !force)
432 die("A branch named '%s' already exists.", newname);
434 strbuf_addf(&logmsg, "Branch: renamed %s to %s",
435 oldref.buf, newref.buf);
437 if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
438 die("Branch rename failed");
439 strbuf_release(&logmsg);
441 /* no need to pass logmsg here as HEAD didn't really move */
442 if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
443 die("Branch renamed to %s, but HEAD is not updated!", newname);
445 strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
446 strbuf_release(&oldref);
447 strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
448 strbuf_release(&newref);
449 if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
450 die("Branch is renamed, but update of config-file failed");
451 strbuf_release(&oldsection);
452 strbuf_release(&newsection);
455 static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
457 merge_filter = ((opt->long_name[0] == 'n')
458 ? SHOW_NOT_MERGED
459 : SHOW_MERGED);
460 if (unset)
461 merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
462 if (!arg)
463 arg = "HEAD";
464 if (get_sha1(arg, merge_filter_ref))
465 die("malformed object name %s", arg);
466 return 0;
469 int cmd_branch(int argc, const char **argv, const char *prefix)
471 int delete = 0, rename = 0, force_create = 0;
472 int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
473 int reflog = 0;
474 enum branch_track track;
475 int kinds = REF_LOCAL_BRANCH;
476 struct commit_list *with_commit = NULL;
478 struct option options[] = {
479 OPT_GROUP("Generic options"),
480 OPT__VERBOSE(&verbose),
481 OPT_SET_INT( 0 , "track", &track, "set up tracking mode (see git-pull(1))",
482 BRANCH_TRACK_EXPLICIT),
483 OPT_BOOLEAN( 0 , "color", &branch_use_color, "use colored output"),
484 OPT_SET_INT('r', NULL, &kinds, "act on remote-tracking branches",
485 REF_REMOTE_BRANCH),
487 OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
488 "print only branches that contain the commit",
489 PARSE_OPT_LASTARG_DEFAULT,
490 parse_opt_with_commit, (intptr_t)"HEAD",
493 OPTION_CALLBACK, 0, "with", &with_commit, "commit",
494 "print only branches that contain the commit",
495 PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
496 parse_opt_with_commit, (intptr_t) "HEAD",
498 OPT__ABBREV(&abbrev),
500 OPT_GROUP("Specific git-branch actions:"),
501 OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
502 REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
503 OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
504 OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
505 OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
506 OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
507 OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
508 OPT_BOOLEAN('f', NULL, &force_create, "force creation (when already exists)"),
510 OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
511 "commit", "print only not merged branches",
512 PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
513 opt_parse_merge_filter, (intptr_t) "HEAD",
516 OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
517 "commit", "print only merged branches",
518 PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
519 opt_parse_merge_filter, (intptr_t) "HEAD",
521 OPT_END(),
524 git_config(git_branch_config, NULL);
526 if (branch_use_color == -1)
527 branch_use_color = git_use_color_default;
529 track = git_branch_track;
531 head = resolve_ref("HEAD", head_sha1, 0, NULL);
532 if (!head)
533 die("Failed to resolve HEAD as a valid ref.");
534 head = xstrdup(head);
535 if (!strcmp(head, "HEAD")) {
536 detached = 1;
537 } else {
538 if (prefixcmp(head, "refs/heads/"))
539 die("HEAD not found below refs/heads!");
540 head += 11;
542 hashcpy(merge_filter_ref, head_sha1);
544 argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
545 if (!!delete + !!rename + !!force_create > 1)
546 usage_with_options(builtin_branch_usage, options);
548 if (delete)
549 return delete_branches(argc, argv, delete > 1, kinds);
550 else if (argc == 0)
551 print_ref_list(kinds, detached, verbose, abbrev, with_commit);
552 else if (rename && (argc == 1))
553 rename_branch(head, argv[0], rename > 1);
554 else if (rename && (argc == 2))
555 rename_branch(argv[0], argv[1], rename > 1);
556 else if (argc <= 2)
557 create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
558 force_create, reflog, track);
559 else
560 usage_with_options(builtin_branch_usage, options);
562 return 0;