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[git/spearce.git] / builtin-branch.c
blob14d4b917e5bb929f40efd3fc5e010cec5d3507de
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 GIT_COLOR_RESET,
36 GIT_COLOR_NORMAL, /* PLAIN */
37 GIT_COLOR_RED, /* REMOTE */
38 GIT_COLOR_NORMAL, /* LOCAL */
39 GIT_COLOR_GREEN, /* CURRENT */
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,
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 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 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;
102 struct strbuf bname = STRBUF_INIT;
104 switch (kinds) {
105 case REF_REMOTE_BRANCH:
106 fmt = "refs/remotes/%s";
107 remote = "remote ";
108 force = 1;
109 break;
110 case REF_LOCAL_BRANCH:
111 fmt = "refs/heads/%s";
112 remote = "";
113 break;
114 default:
115 die("cannot use -a with -d");
118 if (!force) {
119 head_rev = lookup_commit_reference(head_sha1);
120 if (!head_rev)
121 die("Couldn't look up commit object for HEAD");
123 for (i = 0; i < argc; i++, strbuf_release(&bname)) {
124 int len = strlen(argv[i]);
126 if (interpret_nth_last_branch(argv[i], &bname) != len)
127 strbuf_add(&bname, argv[i], len);
129 if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
130 error("Cannot delete the branch '%s' "
131 "which you are currently on.", bname.buf);
132 ret = 1;
133 continue;
136 free(name);
138 name = xstrdup(mkpath(fmt, bname.buf));
139 if (!resolve_ref(name, sha1, 1, NULL)) {
140 error("%sbranch '%s' not found.",
141 remote, bname.buf);
142 ret = 1;
143 continue;
146 rev = lookup_commit_reference(sha1);
147 if (!rev) {
148 error("Couldn't look up commit object for '%s'", name);
149 ret = 1;
150 continue;
153 /* This checks whether the merge bases of branch and
154 * HEAD contains branch -- which means that the HEAD
155 * contains everything in both.
158 if (!force &&
159 !in_merge_bases(rev, &head_rev, 1)) {
160 error("The branch '%s' is not an ancestor of "
161 "your current HEAD.\n"
162 "If you are sure you want to delete it, "
163 "run 'git branch -D %s'.", bname.buf, bname.buf);
164 ret = 1;
165 continue;
168 if (delete_ref(name, sha1, 0)) {
169 error("Error deleting %sbranch '%s'", remote,
170 bname.buf);
171 ret = 1;
172 } else {
173 struct strbuf buf = STRBUF_INIT;
174 printf("Deleted %sbranch %s (%s).\n", remote,
175 bname.buf,
176 find_unique_abbrev(sha1, DEFAULT_ABBREV));
177 strbuf_addf(&buf, "branch.%s", bname.buf);
178 if (git_config_rename_section(buf.buf, NULL) < 0)
179 warning("Update of config-file failed");
180 strbuf_release(&buf);
184 free(name);
186 return(ret);
189 struct ref_item {
190 char *name;
191 char *dest;
192 unsigned int kind, len;
193 struct commit *commit;
196 struct ref_list {
197 struct rev_info revs;
198 int index, alloc, maxwidth;
199 struct ref_item *list;
200 struct commit_list *with_commit;
201 int kinds;
204 static char *resolve_symref(const char *src, const char *prefix)
206 unsigned char sha1[20];
207 int flag;
208 const char *dst, *cp;
210 dst = resolve_ref(src, sha1, 0, &flag);
211 if (!(dst && (flag & REF_ISSYMREF)))
212 return NULL;
213 if (prefix && (cp = skip_prefix(dst, prefix)))
214 dst = cp;
215 return xstrdup(dst);
218 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
220 struct ref_list *ref_list = (struct ref_list*)(cb_data);
221 struct ref_item *newitem;
222 struct commit *commit;
223 int kind, i;
224 const char *prefix, *orig_refname = refname;
226 static struct {
227 int kind;
228 const char *prefix;
229 int pfxlen;
230 } ref_kind[] = {
231 { REF_LOCAL_BRANCH, "refs/heads/", 11 },
232 { REF_REMOTE_BRANCH, "refs/remotes/", 13 },
235 /* Detect kind */
236 for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
237 prefix = ref_kind[i].prefix;
238 if (strncmp(refname, prefix, ref_kind[i].pfxlen))
239 continue;
240 kind = ref_kind[i].kind;
241 refname += ref_kind[i].pfxlen;
242 break;
244 if (ARRAY_SIZE(ref_kind) <= i)
245 return 0;
247 commit = lookup_commit_reference_gently(sha1, 1);
248 if (!commit)
249 return error("branch '%s' does not point at a commit", refname);
251 /* Filter with with_commit if specified */
252 if (!is_descendant_of(commit, ref_list->with_commit))
253 return 0;
255 /* Don't add types the caller doesn't want */
256 if ((kind & ref_list->kinds) == 0)
257 return 0;
259 if (merge_filter != NO_FILTER)
260 add_pending_object(&ref_list->revs,
261 (struct object *)commit, refname);
263 /* Resize buffer */
264 if (ref_list->index >= ref_list->alloc) {
265 ref_list->alloc = alloc_nr(ref_list->alloc);
266 ref_list->list = xrealloc(ref_list->list,
267 ref_list->alloc * sizeof(struct ref_item));
270 /* Record the new item */
271 newitem = &(ref_list->list[ref_list->index++]);
272 newitem->name = xstrdup(refname);
273 newitem->kind = kind;
274 newitem->commit = commit;
275 newitem->len = strlen(refname);
276 newitem->dest = resolve_symref(orig_refname, prefix);
277 /* adjust for "remotes/" */
278 if (newitem->kind == REF_REMOTE_BRANCH &&
279 ref_list->kinds != REF_REMOTE_BRANCH)
280 newitem->len += 8;
281 if (newitem->len > ref_list->maxwidth)
282 ref_list->maxwidth = newitem->len;
284 return 0;
287 static void free_ref_list(struct ref_list *ref_list)
289 int i;
291 for (i = 0; i < ref_list->index; i++) {
292 free(ref_list->list[i].name);
293 free(ref_list->list[i].dest);
295 free(ref_list->list);
298 static int ref_cmp(const void *r1, const void *r2)
300 struct ref_item *c1 = (struct ref_item *)(r1);
301 struct ref_item *c2 = (struct ref_item *)(r2);
303 if (c1->kind != c2->kind)
304 return c1->kind - c2->kind;
305 return strcmp(c1->name, c2->name);
308 static void fill_tracking_info(struct strbuf *stat, const char *branch_name)
310 int ours, theirs;
311 struct branch *branch = branch_get(branch_name);
313 if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
314 return;
315 if (!ours)
316 strbuf_addf(stat, "[behind %d] ", theirs);
317 else if (!theirs)
318 strbuf_addf(stat, "[ahead %d] ", ours);
319 else
320 strbuf_addf(stat, "[ahead %d, behind %d] ", ours, theirs);
323 static int matches_merge_filter(struct commit *commit)
325 int is_merged;
327 if (merge_filter == NO_FILTER)
328 return 1;
330 is_merged = !!(commit->object.flags & UNINTERESTING);
331 return (is_merged == (merge_filter == SHOW_MERGED));
334 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
335 int abbrev, int current, char *prefix)
337 char c;
338 int color;
339 struct commit *commit = item->commit;
340 struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
342 if (!matches_merge_filter(commit))
343 return;
345 switch (item->kind) {
346 case REF_LOCAL_BRANCH:
347 color = BRANCH_COLOR_LOCAL;
348 break;
349 case REF_REMOTE_BRANCH:
350 color = BRANCH_COLOR_REMOTE;
351 break;
352 default:
353 color = BRANCH_COLOR_PLAIN;
354 break;
357 c = ' ';
358 if (current) {
359 c = '*';
360 color = BRANCH_COLOR_CURRENT;
363 strbuf_addf(&name, "%s%s", prefix, item->name);
364 if (verbose)
365 strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
366 maxwidth, name.buf,
367 branch_get_color(BRANCH_COLOR_RESET));
368 else
369 strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
370 name.buf, branch_get_color(BRANCH_COLOR_RESET));
372 if (item->dest)
373 strbuf_addf(&out, " -> %s", item->dest);
374 else if (verbose) {
375 struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
376 const char *sub = " **** invalid ref ****";
378 commit = item->commit;
379 if (commit && !parse_commit(commit)) {
380 pretty_print_commit(CMIT_FMT_ONELINE, commit,
381 &subject, 0, NULL, NULL, 0, 0);
382 sub = subject.buf;
385 if (item->kind == REF_LOCAL_BRANCH)
386 fill_tracking_info(&stat, item->name);
388 strbuf_addf(&out, " %s %s%s",
389 find_unique_abbrev(item->commit->object.sha1, abbrev),
390 stat.buf, sub);
391 strbuf_release(&stat);
392 strbuf_release(&subject);
394 printf("%s\n", out.buf);
395 strbuf_release(&name);
396 strbuf_release(&out);
399 static int calc_maxwidth(struct ref_list *refs)
401 int i, w = 0;
402 for (i = 0; i < refs->index; i++) {
403 if (!matches_merge_filter(refs->list[i].commit))
404 continue;
405 if (refs->list[i].len > w)
406 w = refs->list[i].len;
408 return w;
411 static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
413 int i;
414 struct ref_list ref_list;
415 struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
417 memset(&ref_list, 0, sizeof(ref_list));
418 ref_list.kinds = kinds;
419 ref_list.with_commit = with_commit;
420 if (merge_filter != NO_FILTER)
421 init_revisions(&ref_list.revs, NULL);
422 for_each_ref(append_ref, &ref_list);
423 if (merge_filter != NO_FILTER) {
424 struct commit *filter;
425 filter = lookup_commit_reference_gently(merge_filter_ref, 0);
426 filter->object.flags |= UNINTERESTING;
427 add_pending_object(&ref_list.revs,
428 (struct object *) filter, "");
429 ref_list.revs.limited = 1;
430 prepare_revision_walk(&ref_list.revs);
431 if (verbose)
432 ref_list.maxwidth = calc_maxwidth(&ref_list);
435 qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
437 detached = (detached && (kinds & REF_LOCAL_BRANCH));
438 if (detached && head_commit &&
439 is_descendant_of(head_commit, with_commit)) {
440 struct ref_item item;
441 item.name = xstrdup("(no branch)");
442 item.len = strlen(item.name);
443 item.kind = REF_LOCAL_BRANCH;
444 item.dest = NULL;
445 item.commit = head_commit;
446 if (item.len > ref_list.maxwidth)
447 ref_list.maxwidth = item.len;
448 print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1, "");
449 free(item.name);
452 for (i = 0; i < ref_list.index; i++) {
453 int current = !detached &&
454 (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
455 !strcmp(ref_list.list[i].name, head);
456 char *prefix = (kinds != REF_REMOTE_BRANCH &&
457 ref_list.list[i].kind == REF_REMOTE_BRANCH)
458 ? "remotes/" : "";
459 print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
460 abbrev, current, prefix);
463 free_ref_list(&ref_list);
466 static void rename_branch(const char *oldname, const char *newname, int force)
468 struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
469 unsigned char sha1[20];
470 struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
472 if (!oldname)
473 die("cannot rename the current branch while not on any.");
475 strbuf_addf(&oldref, "refs/heads/%s", oldname);
477 if (check_ref_format(oldref.buf))
478 die("Invalid branch name: %s", oldref.buf);
480 strbuf_addf(&newref, "refs/heads/%s", newname);
482 if (check_ref_format(newref.buf))
483 die("Invalid branch name: %s", newref.buf);
485 if (resolve_ref(newref.buf, sha1, 1, NULL) && !force)
486 die("A branch named '%s' already exists.", newname);
488 strbuf_addf(&logmsg, "Branch: renamed %s to %s",
489 oldref.buf, newref.buf);
491 if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
492 die("Branch rename failed");
493 strbuf_release(&logmsg);
495 /* no need to pass logmsg here as HEAD didn't really move */
496 if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
497 die("Branch renamed to %s, but HEAD is not updated!", newname);
499 strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
500 strbuf_release(&oldref);
501 strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
502 strbuf_release(&newref);
503 if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
504 die("Branch is renamed, but update of config-file failed");
505 strbuf_release(&oldsection);
506 strbuf_release(&newsection);
509 static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
511 merge_filter = ((opt->long_name[0] == 'n')
512 ? SHOW_NOT_MERGED
513 : SHOW_MERGED);
514 if (unset)
515 merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
516 if (!arg)
517 arg = "HEAD";
518 if (get_sha1(arg, merge_filter_ref))
519 die("malformed object name %s", arg);
520 return 0;
523 int cmd_branch(int argc, const char **argv, const char *prefix)
525 int delete = 0, rename = 0, force_create = 0;
526 int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
527 int reflog = 0;
528 enum branch_track track;
529 int kinds = REF_LOCAL_BRANCH;
530 struct commit_list *with_commit = NULL;
532 struct option options[] = {
533 OPT_GROUP("Generic options"),
534 OPT__VERBOSE(&verbose),
535 OPT_SET_INT( 0 , "track", &track, "set up tracking mode (see git-pull(1))",
536 BRANCH_TRACK_EXPLICIT),
537 OPT_BOOLEAN( 0 , "color", &branch_use_color, "use colored output"),
538 OPT_SET_INT('r', NULL, &kinds, "act on remote-tracking branches",
539 REF_REMOTE_BRANCH),
541 OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
542 "print only branches that contain the commit",
543 PARSE_OPT_LASTARG_DEFAULT,
544 parse_opt_with_commit, (intptr_t)"HEAD",
547 OPTION_CALLBACK, 0, "with", &with_commit, "commit",
548 "print only branches that contain the commit",
549 PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
550 parse_opt_with_commit, (intptr_t) "HEAD",
552 OPT__ABBREV(&abbrev),
554 OPT_GROUP("Specific git-branch actions:"),
555 OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
556 REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
557 OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
558 OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
559 OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
560 OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
561 OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
562 OPT_BOOLEAN('f', NULL, &force_create, "force creation (when already exists)"),
564 OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
565 "commit", "print only not merged branches",
566 PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
567 opt_parse_merge_filter, (intptr_t) "HEAD",
570 OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
571 "commit", "print only merged branches",
572 PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
573 opt_parse_merge_filter, (intptr_t) "HEAD",
575 OPT_END(),
578 git_config(git_branch_config, NULL);
580 if (branch_use_color == -1)
581 branch_use_color = git_use_color_default;
583 track = git_branch_track;
585 head = resolve_ref("HEAD", head_sha1, 0, NULL);
586 if (!head)
587 die("Failed to resolve HEAD as a valid ref.");
588 head = xstrdup(head);
589 if (!strcmp(head, "HEAD")) {
590 detached = 1;
591 } else {
592 if (prefixcmp(head, "refs/heads/"))
593 die("HEAD not found below refs/heads!");
594 head += 11;
596 hashcpy(merge_filter_ref, head_sha1);
598 argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
599 if (!!delete + !!rename + !!force_create > 1)
600 usage_with_options(builtin_branch_usage, options);
602 if (delete)
603 return delete_branches(argc, argv, delete > 1, kinds);
604 else if (argc == 0)
605 print_ref_list(kinds, detached, verbose, abbrev, with_commit);
606 else if (rename && (argc == 1))
607 rename_branch(head, argv[0], rename > 1);
608 else if (rename && (argc == 2))
609 rename_branch(argv[0], argv[1], rename > 1);
610 else if (argc <= 2)
611 create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
612 force_create, reflog, track);
613 else
614 usage_with_options(builtin_branch_usage, options);
616 return 0;