Add zlib
[git/pclouds.git] / builtin-branch.c
blob5f5c1823cb27cf1173c87f43bd0d2de95a06bf46
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"
15 static const char builtin_branch_usage[] =
16 "git-branch [-r] (-d | -D) <branchname> | [--track | --no-track] [-l] [-f] <branchname> [<start-point>] | (-m | -M) [<oldbranch>] <newbranch> | [--color | --no-color] [-r | -a] [-v [--abbrev=<length> | --no-abbrev]]";
18 #define REF_UNKNOWN_TYPE 0x00
19 #define REF_LOCAL_BRANCH 0x01
20 #define REF_REMOTE_BRANCH 0x02
21 #define REF_TAG 0x04
23 static const char *head;
24 static unsigned char head_sha1[20];
26 static int branch_track = 1;
28 static int branch_use_color;
29 static char branch_colors[][COLOR_MAXLEN] = {
30 "\033[m", /* reset */
31 "", /* PLAIN (normal) */
32 "\033[31m", /* REMOTE (red) */
33 "", /* LOCAL (normal) */
34 "\033[32m", /* CURRENT (green) */
36 enum color_branch {
37 COLOR_BRANCH_RESET = 0,
38 COLOR_BRANCH_PLAIN = 1,
39 COLOR_BRANCH_REMOTE = 2,
40 COLOR_BRANCH_LOCAL = 3,
41 COLOR_BRANCH_CURRENT = 4,
44 static int parse_branch_color_slot(const char *var, int ofs)
46 if (!strcasecmp(var+ofs, "plain"))
47 return COLOR_BRANCH_PLAIN;
48 if (!strcasecmp(var+ofs, "reset"))
49 return COLOR_BRANCH_RESET;
50 if (!strcasecmp(var+ofs, "remote"))
51 return COLOR_BRANCH_REMOTE;
52 if (!strcasecmp(var+ofs, "local"))
53 return COLOR_BRANCH_LOCAL;
54 if (!strcasecmp(var+ofs, "current"))
55 return COLOR_BRANCH_CURRENT;
56 die("bad config variable '%s'", var);
59 static int git_branch_config(const char *var, const char *value)
61 if (!strcmp(var, "color.branch")) {
62 branch_use_color = git_config_colorbool(var, value);
63 return 0;
65 if (!prefixcmp(var, "color.branch.")) {
66 int slot = parse_branch_color_slot(var, 13);
67 color_parse(value, var, branch_colors[slot]);
68 return 0;
70 if (!strcmp(var, "branch.autosetupmerge"))
71 branch_track = git_config_bool(var, value);
73 return git_default_config(var, value);
76 static const char *branch_get_color(enum color_branch ix)
78 if (branch_use_color)
79 return branch_colors[ix];
80 return "";
83 static int delete_branches(int argc, const char **argv, int force, int kinds)
85 struct commit *rev, *head_rev = head_rev;
86 unsigned char sha1[20];
87 char *name = NULL;
88 const char *fmt, *remote;
89 char section[PATH_MAX];
90 int i;
91 int ret = 0;
93 switch (kinds) {
94 case REF_REMOTE_BRANCH:
95 fmt = "refs/remotes/%s";
96 remote = "remote ";
97 force = 1;
98 break;
99 case REF_LOCAL_BRANCH:
100 fmt = "refs/heads/%s";
101 remote = "";
102 break;
103 default:
104 die("cannot use -a with -d");
107 if (!force) {
108 head_rev = lookup_commit_reference(head_sha1);
109 if (!head_rev)
110 die("Couldn't look up commit object for HEAD");
112 for (i = 0; i < argc; i++) {
113 if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
114 error("Cannot delete the branch '%s' "
115 "which you are currently on.", argv[i]);
116 ret = 1;
117 continue;
120 if (name)
121 free(name);
123 name = xstrdup(mkpath(fmt, argv[i]));
124 if (!resolve_ref(name, sha1, 1, NULL)) {
125 error("%sbranch '%s' not found.",
126 remote, argv[i]);
127 ret = 1;
128 continue;
131 rev = lookup_commit_reference(sha1);
132 if (!rev) {
133 error("Couldn't look up commit object for '%s'", name);
134 ret = 1;
135 continue;
138 /* This checks whether the merge bases of branch and
139 * HEAD contains branch -- which means that the HEAD
140 * contains everything in both.
143 if (!force &&
144 !in_merge_bases(rev, &head_rev, 1)) {
145 error("The branch '%s' is not a strict subset of "
146 "your current HEAD.\n"
147 "If you are sure you want to delete it, "
148 "run 'git branch -D %s'.", argv[i], argv[i]);
149 ret = 1;
150 continue;
153 if (delete_ref(name, sha1)) {
154 error("Error deleting %sbranch '%s'", remote,
155 argv[i]);
156 ret = 1;
157 } else {
158 printf("Deleted %sbranch %s.\n", remote, argv[i]);
159 snprintf(section, sizeof(section), "branch.%s",
160 argv[i]);
161 if (git_config_rename_section(section, NULL) < 0)
162 warning("Update of config-file failed");
166 if (name)
167 free(name);
169 return(ret);
172 struct ref_item {
173 char *name;
174 unsigned int kind;
175 unsigned char sha1[20];
178 struct ref_list {
179 int index, alloc, maxwidth;
180 struct ref_item *list;
181 int kinds;
184 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
186 struct ref_list *ref_list = (struct ref_list*)(cb_data);
187 struct ref_item *newitem;
188 int kind = REF_UNKNOWN_TYPE;
189 int len;
191 /* Detect kind */
192 if (!prefixcmp(refname, "refs/heads/")) {
193 kind = REF_LOCAL_BRANCH;
194 refname += 11;
195 } else if (!prefixcmp(refname, "refs/remotes/")) {
196 kind = REF_REMOTE_BRANCH;
197 refname += 13;
198 } else if (!prefixcmp(refname, "refs/tags/")) {
199 kind = REF_TAG;
200 refname += 10;
203 /* Don't add types the caller doesn't want */
204 if ((kind & ref_list->kinds) == 0)
205 return 0;
207 /* Resize buffer */
208 if (ref_list->index >= ref_list->alloc) {
209 ref_list->alloc = alloc_nr(ref_list->alloc);
210 ref_list->list = xrealloc(ref_list->list,
211 ref_list->alloc * sizeof(struct ref_item));
214 /* Record the new item */
215 newitem = &(ref_list->list[ref_list->index++]);
216 newitem->name = xstrdup(refname);
217 newitem->kind = kind;
218 hashcpy(newitem->sha1, sha1);
219 len = strlen(newitem->name);
220 if (len > ref_list->maxwidth)
221 ref_list->maxwidth = len;
223 return 0;
226 static void free_ref_list(struct ref_list *ref_list)
228 int i;
230 for (i = 0; i < ref_list->index; i++)
231 free(ref_list->list[i].name);
232 free(ref_list->list);
235 static int ref_cmp(const void *r1, const void *r2)
237 struct ref_item *c1 = (struct ref_item *)(r1);
238 struct ref_item *c2 = (struct ref_item *)(r2);
240 if (c1->kind != c2->kind)
241 return c1->kind - c2->kind;
242 return strcmp(c1->name, c2->name);
245 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
246 int abbrev, int current)
248 char c;
249 int color;
250 struct commit *commit;
252 switch (item->kind) {
253 case REF_LOCAL_BRANCH:
254 color = COLOR_BRANCH_LOCAL;
255 break;
256 case REF_REMOTE_BRANCH:
257 color = COLOR_BRANCH_REMOTE;
258 break;
259 default:
260 color = COLOR_BRANCH_PLAIN;
261 break;
264 c = ' ';
265 if (current) {
266 c = '*';
267 color = COLOR_BRANCH_CURRENT;
270 if (verbose) {
271 char *subject = NULL;
272 unsigned long subject_len = 0;
273 const char *sub = " **** invalid ref ****";
275 commit = lookup_commit(item->sha1);
276 if (commit && !parse_commit(commit)) {
277 pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
278 &subject, &subject_len, 0,
279 NULL, NULL, 0);
280 sub = subject;
282 printf("%c %s%-*s%s %s %s\n", c, branch_get_color(color),
283 maxwidth, item->name,
284 branch_get_color(COLOR_BRANCH_RESET),
285 find_unique_abbrev(item->sha1, abbrev), sub);
286 if (subject)
287 free(subject);
288 } else {
289 printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
290 branch_get_color(COLOR_BRANCH_RESET));
294 static void print_ref_list(int kinds, int detached, int verbose, int abbrev)
296 int i;
297 struct ref_list ref_list;
299 memset(&ref_list, 0, sizeof(ref_list));
300 ref_list.kinds = kinds;
301 for_each_ref(append_ref, &ref_list);
303 qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
305 detached = (detached && (kinds & REF_LOCAL_BRANCH));
306 if (detached) {
307 struct ref_item item;
308 item.name = xstrdup("(no branch)");
309 item.kind = REF_LOCAL_BRANCH;
310 hashcpy(item.sha1, head_sha1);
311 if (strlen(item.name) > ref_list.maxwidth)
312 ref_list.maxwidth = strlen(item.name);
313 print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
314 free(item.name);
317 for (i = 0; i < ref_list.index; i++) {
318 int current = !detached &&
319 (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
320 !strcmp(ref_list.list[i].name, head);
321 print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
322 abbrev, current);
325 free_ref_list(&ref_list);
328 struct tracking {
329 struct refspec spec;
330 char *src;
331 const char *remote;
332 int matches;
335 static int find_tracked_branch(struct remote *remote, void *priv)
337 struct tracking *tracking = priv;
339 if (!remote_find_tracking(remote, &tracking->spec)) {
340 if (++tracking->matches == 1) {
341 tracking->src = tracking->spec.src;
342 tracking->remote = remote->name;
343 } else {
344 free(tracking->spec.src);
345 if (tracking->src) {
346 free(tracking->src);
347 tracking->src = NULL;
350 tracking->spec.src = NULL;
353 return 0;
358 * This is called when new_ref is branched off of orig_ref, and tries
359 * to infer the settings for branch.<new_ref>.{remote,merge} from the
360 * config.
362 static int setup_tracking(const char *new_ref, const char *orig_ref)
364 char key[1024];
365 struct tracking tracking;
367 if (strlen(new_ref) > 1024 - 7 - 7 - 1)
368 return error("Tracking not set up: name too long: %s",
369 new_ref);
371 memset(&tracking, 0, sizeof(tracking));
372 tracking.spec.dst = (char *)orig_ref;
373 if (for_each_remote(find_tracked_branch, &tracking) ||
374 !tracking.matches)
375 return 1;
377 if (tracking.matches > 1)
378 return error("Not tracking: ambiguous information for ref %s",
379 orig_ref);
381 if (tracking.matches == 1) {
382 sprintf(key, "branch.%s.remote", new_ref);
383 git_config_set(key, tracking.remote ? tracking.remote : ".");
384 sprintf(key, "branch.%s.merge", new_ref);
385 git_config_set(key, tracking.src);
386 free(tracking.src);
387 printf("Branch %s set up to track remote branch %s.\n",
388 new_ref, orig_ref);
391 return 0;
394 static void create_branch(const char *name, const char *start_name,
395 int force, int reflog, int track)
397 struct ref_lock *lock;
398 struct commit *commit;
399 unsigned char sha1[20];
400 char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20];
401 int forcing = 0;
403 snprintf(ref, sizeof ref, "refs/heads/%s", name);
404 if (check_ref_format(ref))
405 die("'%s' is not a valid branch name.", name);
407 if (resolve_ref(ref, sha1, 1, NULL)) {
408 if (!force)
409 die("A branch named '%s' already exists.", name);
410 else if (!is_bare_repository() && !strcmp(head, name))
411 die("Cannot force update the current branch.");
412 forcing = 1;
415 real_ref = NULL;
416 if (get_sha1(start_name, sha1))
417 die("Not a valid object name: '%s'.", start_name);
419 switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
420 case 0:
421 /* Not branching from any existing branch */
422 real_ref = NULL;
423 break;
424 case 1:
425 /* Unique completion -- good */
426 break;
427 default:
428 die("Ambiguous object name: '%s'.", start_name);
429 break;
432 if ((commit = lookup_commit_reference(sha1)) == NULL)
433 die("Not a valid branch point: '%s'.", start_name);
434 hashcpy(sha1, commit->object.sha1);
436 lock = lock_any_ref_for_update(ref, NULL, 0);
437 if (!lock)
438 die("Failed to lock ref for update: %s.", strerror(errno));
440 if (reflog)
441 log_all_ref_updates = 1;
443 if (forcing)
444 snprintf(msg, sizeof msg, "branch: Reset from %s",
445 start_name);
446 else
447 snprintf(msg, sizeof msg, "branch: Created from %s",
448 start_name);
450 /* When branching off a remote branch, set up so that git-pull
451 automatically merges from there. So far, this is only done for
452 remotes registered via .git/config. */
453 if (real_ref && track)
454 setup_tracking(name, real_ref);
456 if (write_ref_sha1(lock, sha1, msg) < 0)
457 die("Failed to write ref: %s.", strerror(errno));
459 if (real_ref)
460 free(real_ref);
463 static void rename_branch(const char *oldname, const char *newname, int force)
465 char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
466 unsigned char sha1[20];
467 char oldsection[PATH_MAX], newsection[PATH_MAX];
469 if (!oldname)
470 die("cannot rename the current branch while not on any.");
472 if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref))
473 die("Old branchname too long");
475 if (check_ref_format(oldref))
476 die("Invalid branch name: %s", oldref);
478 if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref))
479 die("New branchname too long");
481 if (check_ref_format(newref))
482 die("Invalid branch name: %s", newref);
484 if (resolve_ref(newref, sha1, 1, NULL) && !force)
485 die("A branch named '%s' already exists.", newname);
487 snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s",
488 oldref, newref);
490 if (rename_ref(oldref, newref, logmsg))
491 die("Branch rename failed");
493 /* no need to pass logmsg here as HEAD didn't really move */
494 if (!strcmp(oldname, head) && create_symref("HEAD", newref, NULL))
495 die("Branch renamed to %s, but HEAD is not updated!", newname);
497 snprintf(oldsection, sizeof(oldsection), "branch.%s", oldref + 11);
498 snprintf(newsection, sizeof(newsection), "branch.%s", newref + 11);
499 if (git_config_rename_section(oldsection, newsection) < 0)
500 die("Branch is renamed, but update of config-file failed");
503 int cmd_branch(int argc, const char **argv, const char *prefix)
505 int delete = 0, force_delete = 0, force_create = 0;
506 int rename = 0, force_rename = 0;
507 int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
508 int reflog = 0, track;
509 int kinds = REF_LOCAL_BRANCH;
510 int i;
512 git_config(git_branch_config);
513 track = branch_track;
515 for (i = 1; i < argc; i++) {
516 const char *arg = argv[i];
518 if (arg[0] != '-')
519 break;
520 if (!strcmp(arg, "--")) {
521 i++;
522 break;
524 if (!strcmp(arg, "--track")) {
525 track = 1;
526 continue;
528 if (!strcmp(arg, "--no-track")) {
529 track = 0;
530 continue;
532 if (!strcmp(arg, "-d")) {
533 delete = 1;
534 continue;
536 if (!strcmp(arg, "-D")) {
537 delete = 1;
538 force_delete = 1;
539 continue;
541 if (!strcmp(arg, "-f")) {
542 force_create = 1;
543 continue;
545 if (!strcmp(arg, "-m")) {
546 rename = 1;
547 continue;
549 if (!strcmp(arg, "-M")) {
550 rename = 1;
551 force_rename = 1;
552 continue;
554 if (!strcmp(arg, "-r")) {
555 kinds = REF_REMOTE_BRANCH;
556 continue;
558 if (!strcmp(arg, "-a")) {
559 kinds = REF_REMOTE_BRANCH | REF_LOCAL_BRANCH;
560 continue;
562 if (!strcmp(arg, "-l")) {
563 reflog = 1;
564 continue;
566 if (!prefixcmp(arg, "--no-abbrev")) {
567 abbrev = 0;
568 continue;
570 if (!prefixcmp(arg, "--abbrev=")) {
571 abbrev = strtoul(arg + 9, NULL, 10);
572 if (abbrev < MINIMUM_ABBREV)
573 abbrev = MINIMUM_ABBREV;
574 else if (abbrev > 40)
575 abbrev = 40;
576 continue;
578 if (!strcmp(arg, "-v")) {
579 verbose = 1;
580 continue;
582 if (!strcmp(arg, "--color")) {
583 branch_use_color = 1;
584 continue;
586 if (!strcmp(arg, "--no-color")) {
587 branch_use_color = 0;
588 continue;
590 usage(builtin_branch_usage);
593 if ((delete && rename) || (delete && force_create) ||
594 (rename && force_create))
595 usage(builtin_branch_usage);
597 head = resolve_ref("HEAD", head_sha1, 0, NULL);
598 if (!head)
599 die("Failed to resolve HEAD as a valid ref.");
600 head = xstrdup(head);
601 if (!strcmp(head, "HEAD")) {
602 detached = 1;
604 else {
605 if (prefixcmp(head, "refs/heads/"))
606 die("HEAD not found below refs/heads!");
607 head += 11;
610 if (delete)
611 return delete_branches(argc - i, argv + i, force_delete, kinds);
612 else if (i == argc)
613 print_ref_list(kinds, detached, verbose, abbrev);
614 else if (rename && (i == argc - 1))
615 rename_branch(head, argv[i], force_rename);
616 else if (rename && (i == argc - 2))
617 rename_branch(argv[i], argv[i + 1], force_rename);
618 else if (i == argc - 1 || i == argc - 2)
619 create_branch(argv[i], (i == argc - 2) ? argv[i+1] : head,
620 force_create, reflog, track);
621 else
622 usage(builtin_branch_usage);
624 return 0;