git-svn: add fetch --parent option
[git/mingw.git] / builtin-branch.c
blobca81d725cbac618b7dbb351dc4fb8d3a7f8fef1b
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 strbuf_branchname(&bname, argv[i]);
125 if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
126 error("Cannot delete the branch '%s' "
127 "which you are currently on.", bname.buf);
128 ret = 1;
129 continue;
132 free(name);
134 name = xstrdup(mkpath(fmt, bname.buf));
135 if (!resolve_ref(name, sha1, 1, NULL)) {
136 error("%sbranch '%s' not found.",
137 remote, bname.buf);
138 ret = 1;
139 continue;
142 rev = lookup_commit_reference(sha1);
143 if (!rev) {
144 error("Couldn't look up commit object for '%s'", name);
145 ret = 1;
146 continue;
149 /* This checks whether the merge bases of branch and
150 * HEAD contains branch -- which means that the HEAD
151 * contains everything in both.
154 if (!force &&
155 !in_merge_bases(rev, &head_rev, 1)) {
156 error("The branch '%s' is not an ancestor of "
157 "your current HEAD.\n"
158 "If you are sure you want to delete it, "
159 "run 'git branch -D %s'.", bname.buf, bname.buf);
160 ret = 1;
161 continue;
164 if (delete_ref(name, sha1, 0)) {
165 error("Error deleting %sbranch '%s'", remote,
166 bname.buf);
167 ret = 1;
168 } else {
169 struct strbuf buf = STRBUF_INIT;
170 printf("Deleted %sbranch %s (was %s).\n", remote,
171 bname.buf,
172 find_unique_abbrev(sha1, DEFAULT_ABBREV));
173 strbuf_addf(&buf, "branch.%s", bname.buf);
174 if (git_config_rename_section(buf.buf, NULL) < 0)
175 warning("Update of config-file failed");
176 strbuf_release(&buf);
180 free(name);
182 return(ret);
185 struct ref_item {
186 char *name;
187 char *dest;
188 unsigned int kind, len;
189 struct commit *commit;
192 struct ref_list {
193 struct rev_info revs;
194 int index, alloc, maxwidth;
195 struct ref_item *list;
196 struct commit_list *with_commit;
197 int kinds;
200 static char *resolve_symref(const char *src, const char *prefix)
202 unsigned char sha1[20];
203 int flag;
204 const char *dst, *cp;
206 dst = resolve_ref(src, sha1, 0, &flag);
207 if (!(dst && (flag & REF_ISSYMREF)))
208 return NULL;
209 if (prefix && (cp = skip_prefix(dst, prefix)))
210 dst = cp;
211 return xstrdup(dst);
214 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
216 struct ref_list *ref_list = (struct ref_list*)(cb_data);
217 struct ref_item *newitem;
218 struct commit *commit;
219 int kind, i;
220 const char *prefix, *orig_refname = refname;
222 static struct {
223 int kind;
224 const char *prefix;
225 int pfxlen;
226 } ref_kind[] = {
227 { REF_LOCAL_BRANCH, "refs/heads/", 11 },
228 { REF_REMOTE_BRANCH, "refs/remotes/", 13 },
231 /* Detect kind */
232 for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
233 prefix = ref_kind[i].prefix;
234 if (strncmp(refname, prefix, ref_kind[i].pfxlen))
235 continue;
236 kind = ref_kind[i].kind;
237 refname += ref_kind[i].pfxlen;
238 break;
240 if (ARRAY_SIZE(ref_kind) <= i)
241 return 0;
243 commit = lookup_commit_reference_gently(sha1, 1);
244 if (!commit)
245 return error("branch '%s' does not point at a commit", refname);
247 /* Filter with with_commit if specified */
248 if (!is_descendant_of(commit, ref_list->with_commit))
249 return 0;
251 /* Don't add types the caller doesn't want */
252 if ((kind & ref_list->kinds) == 0)
253 return 0;
255 if (merge_filter != NO_FILTER)
256 add_pending_object(&ref_list->revs,
257 (struct object *)commit, refname);
259 /* Resize buffer */
260 if (ref_list->index >= ref_list->alloc) {
261 ref_list->alloc = alloc_nr(ref_list->alloc);
262 ref_list->list = xrealloc(ref_list->list,
263 ref_list->alloc * sizeof(struct ref_item));
266 /* Record the new item */
267 newitem = &(ref_list->list[ref_list->index++]);
268 newitem->name = xstrdup(refname);
269 newitem->kind = kind;
270 newitem->commit = commit;
271 newitem->len = strlen(refname);
272 newitem->dest = resolve_symref(orig_refname, prefix);
273 /* adjust for "remotes/" */
274 if (newitem->kind == REF_REMOTE_BRANCH &&
275 ref_list->kinds != REF_REMOTE_BRANCH)
276 newitem->len += 8;
277 if (newitem->len > ref_list->maxwidth)
278 ref_list->maxwidth = newitem->len;
280 return 0;
283 static void free_ref_list(struct ref_list *ref_list)
285 int i;
287 for (i = 0; i < ref_list->index; i++) {
288 free(ref_list->list[i].name);
289 free(ref_list->list[i].dest);
291 free(ref_list->list);
294 static int ref_cmp(const void *r1, const void *r2)
296 struct ref_item *c1 = (struct ref_item *)(r1);
297 struct ref_item *c2 = (struct ref_item *)(r2);
299 if (c1->kind != c2->kind)
300 return c1->kind - c2->kind;
301 return strcmp(c1->name, c2->name);
304 static void fill_tracking_info(struct strbuf *stat, const char *branch_name)
306 int ours, theirs;
307 struct branch *branch = branch_get(branch_name);
309 if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
310 return;
311 if (!ours)
312 strbuf_addf(stat, "[behind %d] ", theirs);
313 else if (!theirs)
314 strbuf_addf(stat, "[ahead %d] ", ours);
315 else
316 strbuf_addf(stat, "[ahead %d, behind %d] ", ours, theirs);
319 static int matches_merge_filter(struct commit *commit)
321 int is_merged;
323 if (merge_filter == NO_FILTER)
324 return 1;
326 is_merged = !!(commit->object.flags & UNINTERESTING);
327 return (is_merged == (merge_filter == SHOW_MERGED));
330 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
331 int abbrev, int current, char *prefix)
333 char c;
334 int color;
335 struct commit *commit = item->commit;
336 struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
338 if (!matches_merge_filter(commit))
339 return;
341 switch (item->kind) {
342 case REF_LOCAL_BRANCH:
343 color = BRANCH_COLOR_LOCAL;
344 break;
345 case REF_REMOTE_BRANCH:
346 color = BRANCH_COLOR_REMOTE;
347 break;
348 default:
349 color = BRANCH_COLOR_PLAIN;
350 break;
353 c = ' ';
354 if (current) {
355 c = '*';
356 color = BRANCH_COLOR_CURRENT;
359 strbuf_addf(&name, "%s%s", prefix, item->name);
360 if (verbose)
361 strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
362 maxwidth, name.buf,
363 branch_get_color(BRANCH_COLOR_RESET));
364 else
365 strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
366 name.buf, branch_get_color(BRANCH_COLOR_RESET));
368 if (item->dest)
369 strbuf_addf(&out, " -> %s", item->dest);
370 else if (verbose) {
371 struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
372 const char *sub = " **** invalid ref ****";
374 commit = item->commit;
375 if (commit && !parse_commit(commit)) {
376 pretty_print_commit(CMIT_FMT_ONELINE, commit,
377 &subject, 0, NULL, NULL, 0, 0);
378 sub = subject.buf;
381 if (item->kind == REF_LOCAL_BRANCH)
382 fill_tracking_info(&stat, item->name);
384 strbuf_addf(&out, " %s %s%s",
385 find_unique_abbrev(item->commit->object.sha1, abbrev),
386 stat.buf, sub);
387 strbuf_release(&stat);
388 strbuf_release(&subject);
390 printf("%s\n", out.buf);
391 strbuf_release(&name);
392 strbuf_release(&out);
395 static int calc_maxwidth(struct ref_list *refs)
397 int i, w = 0;
398 for (i = 0; i < refs->index; i++) {
399 if (!matches_merge_filter(refs->list[i].commit))
400 continue;
401 if (refs->list[i].len > w)
402 w = refs->list[i].len;
404 return w;
407 static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
409 int i;
410 struct ref_list ref_list;
411 struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
413 memset(&ref_list, 0, sizeof(ref_list));
414 ref_list.kinds = kinds;
415 ref_list.with_commit = with_commit;
416 if (merge_filter != NO_FILTER)
417 init_revisions(&ref_list.revs, NULL);
418 for_each_ref(append_ref, &ref_list);
419 if (merge_filter != NO_FILTER) {
420 struct commit *filter;
421 filter = lookup_commit_reference_gently(merge_filter_ref, 0);
422 filter->object.flags |= UNINTERESTING;
423 add_pending_object(&ref_list.revs,
424 (struct object *) filter, "");
425 ref_list.revs.limited = 1;
426 prepare_revision_walk(&ref_list.revs);
427 if (verbose)
428 ref_list.maxwidth = calc_maxwidth(&ref_list);
431 qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
433 detached = (detached && (kinds & REF_LOCAL_BRANCH));
434 if (detached && head_commit &&
435 is_descendant_of(head_commit, with_commit)) {
436 struct ref_item item;
437 item.name = xstrdup("(no branch)");
438 item.len = strlen(item.name);
439 item.kind = REF_LOCAL_BRANCH;
440 item.dest = NULL;
441 item.commit = head_commit;
442 if (item.len > ref_list.maxwidth)
443 ref_list.maxwidth = item.len;
444 print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1, "");
445 free(item.name);
448 for (i = 0; i < ref_list.index; i++) {
449 int current = !detached &&
450 (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
451 !strcmp(ref_list.list[i].name, head);
452 char *prefix = (kinds != REF_REMOTE_BRANCH &&
453 ref_list.list[i].kind == REF_REMOTE_BRANCH)
454 ? "remotes/" : "";
455 print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
456 abbrev, current, prefix);
459 free_ref_list(&ref_list);
462 static void rename_branch(const char *oldname, const char *newname, int force)
464 struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
465 unsigned char sha1[20];
466 struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
467 int recovery = 0;
469 if (!oldname)
470 die("cannot rename the current branch while not on any.");
472 if (strbuf_check_branch_ref(&oldref, oldname)) {
474 * Bad name --- this could be an attempt to rename a
475 * ref that we used to allow to be created by accident.
477 if (resolve_ref(oldref.buf, sha1, 1, NULL))
478 recovery = 1;
479 else
480 die("Invalid branch name: '%s'", oldname);
483 if (strbuf_check_branch_ref(&newref, newname))
484 die("Invalid branch name: '%s'", newname);
486 if (resolve_ref(newref.buf, sha1, 1, NULL) && !force)
487 die("A branch named '%s' already exists.", newref.buf + 11);
489 strbuf_addf(&logmsg, "Branch: renamed %s to %s",
490 oldref.buf, newref.buf);
492 if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
493 die("Branch rename failed");
494 strbuf_release(&logmsg);
496 if (recovery)
497 warning("Renamed a misnamed branch '%s' away", oldref.buf + 11);
499 /* no need to pass logmsg here as HEAD didn't really move */
500 if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
501 die("Branch renamed to %s, but HEAD is not updated!", newname);
503 strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
504 strbuf_release(&oldref);
505 strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
506 strbuf_release(&newref);
507 if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
508 die("Branch is renamed, but update of config-file failed");
509 strbuf_release(&oldsection);
510 strbuf_release(&newsection);
513 static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
515 merge_filter = ((opt->long_name[0] == 'n')
516 ? SHOW_NOT_MERGED
517 : SHOW_MERGED);
518 if (unset)
519 merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
520 if (!arg)
521 arg = "HEAD";
522 if (get_sha1(arg, merge_filter_ref))
523 die("malformed object name %s", arg);
524 return 0;
527 int cmd_branch(int argc, const char **argv, const char *prefix)
529 int delete = 0, rename = 0, force_create = 0;
530 int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
531 int reflog = 0;
532 enum branch_track track;
533 int kinds = REF_LOCAL_BRANCH;
534 struct commit_list *with_commit = NULL;
536 struct option options[] = {
537 OPT_GROUP("Generic options"),
538 OPT__VERBOSE(&verbose),
539 OPT_SET_INT( 0 , "track", &track, "set up tracking mode (see git-pull(1))",
540 BRANCH_TRACK_EXPLICIT),
541 OPT_BOOLEAN( 0 , "color", &branch_use_color, "use colored output"),
542 OPT_SET_INT('r', NULL, &kinds, "act on remote-tracking branches",
543 REF_REMOTE_BRANCH),
545 OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
546 "print only branches that contain the commit",
547 PARSE_OPT_LASTARG_DEFAULT,
548 parse_opt_with_commit, (intptr_t)"HEAD",
551 OPTION_CALLBACK, 0, "with", &with_commit, "commit",
552 "print only branches that contain the commit",
553 PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
554 parse_opt_with_commit, (intptr_t) "HEAD",
556 OPT__ABBREV(&abbrev),
558 OPT_GROUP("Specific git-branch actions:"),
559 OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
560 REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
561 OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
562 OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
563 OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
564 OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
565 OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
566 OPT_BOOLEAN('f', NULL, &force_create, "force creation (when already exists)"),
568 OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
569 "commit", "print only not merged branches",
570 PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
571 opt_parse_merge_filter, (intptr_t) "HEAD",
574 OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
575 "commit", "print only merged branches",
576 PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
577 opt_parse_merge_filter, (intptr_t) "HEAD",
579 OPT_END(),
582 git_config(git_branch_config, NULL);
584 if (branch_use_color == -1)
585 branch_use_color = git_use_color_default;
587 track = git_branch_track;
589 head = resolve_ref("HEAD", head_sha1, 0, NULL);
590 if (!head)
591 die("Failed to resolve HEAD as a valid ref.");
592 head = xstrdup(head);
593 if (!strcmp(head, "HEAD")) {
594 detached = 1;
595 } else {
596 if (prefixcmp(head, "refs/heads/"))
597 die("HEAD not found below refs/heads!");
598 head += 11;
600 hashcpy(merge_filter_ref, head_sha1);
602 argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
603 if (!!delete + !!rename + !!force_create > 1)
604 usage_with_options(builtin_branch_usage, options);
606 if (delete)
607 return delete_branches(argc, argv, delete > 1, kinds);
608 else if (argc == 0)
609 print_ref_list(kinds, detached, verbose, abbrev, with_commit);
610 else if (rename && (argc == 1))
611 rename_branch(head, argv[0], rename > 1);
612 else if (rename && (argc == 2))
613 rename_branch(argv[0], argv[1], rename > 1);
614 else if (argc <= 2)
615 create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
616 force_create, reflog, track);
617 else
618 usage_with_options(builtin_branch_usage, options);
620 return 0;