Merge branch 'rs/diff-parseopts-cleanup'
[git/gitster.git] / worktree.c
blobcf5eea8c931a0cea85499aab6d24e5cbd392d839
1 #include "git-compat-util.h"
2 #include "abspath.h"
3 #include "environment.h"
4 #include "gettext.h"
5 #include "path.h"
6 #include "repository.h"
7 #include "refs.h"
8 #include "setup.h"
9 #include "strbuf.h"
10 #include "worktree.h"
11 #include "dir.h"
12 #include "wt-status.h"
13 #include "config.h"
15 void free_worktree(struct worktree *worktree)
17 if (!worktree)
18 return;
19 free(worktree->path);
20 free(worktree->id);
21 free(worktree->head_ref);
22 free(worktree->lock_reason);
23 free(worktree->prune_reason);
24 free(worktree);
27 void free_worktrees(struct worktree **worktrees)
29 int i = 0;
30 for (i = 0; worktrees[i]; i++)
31 free_worktree(worktrees[i]);
32 free (worktrees);
35 /**
36 * Update head_oid, head_ref and is_detached of the given worktree
38 static void add_head_info(struct worktree *wt)
40 int flags;
41 const char *target;
43 target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt),
44 "HEAD",
46 &wt->head_oid, &flags);
47 if (!target)
48 return;
50 if (flags & REF_ISSYMREF)
51 wt->head_ref = xstrdup(target);
52 else
53 wt->is_detached = 1;
56 /**
57 * get the main worktree
59 static struct worktree *get_main_worktree(int skip_reading_head)
61 struct worktree *worktree = NULL;
62 struct strbuf worktree_path = STRBUF_INIT;
64 strbuf_add_real_path(&worktree_path, get_git_common_dir());
65 strbuf_strip_suffix(&worktree_path, "/.git");
67 CALLOC_ARRAY(worktree, 1);
68 worktree->path = strbuf_detach(&worktree_path, NULL);
70 * NEEDSWORK: If this function is called from a secondary worktree and
71 * config.worktree is present, is_bare_repository_cfg will reflect the
72 * contents of config.worktree, not the contents of the main worktree.
73 * This means that worktree->is_bare may be set to 0 even if the main
74 * worktree is configured to be bare.
76 worktree->is_bare = (is_bare_repository_cfg == 1) ||
77 is_bare_repository();
78 if (!skip_reading_head)
79 add_head_info(worktree);
80 return worktree;
83 struct worktree *get_linked_worktree(const char *id,
84 int skip_reading_head)
86 struct worktree *worktree = NULL;
87 struct strbuf path = STRBUF_INIT;
88 struct strbuf worktree_path = STRBUF_INIT;
90 if (!id)
91 die("Missing linked worktree name");
93 strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id);
94 if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0)
95 /* invalid gitdir file */
96 goto done;
97 strbuf_rtrim(&worktree_path);
98 strbuf_strip_suffix(&worktree_path, "/.git");
100 CALLOC_ARRAY(worktree, 1);
101 worktree->path = strbuf_detach(&worktree_path, NULL);
102 worktree->id = xstrdup(id);
103 if (!skip_reading_head)
104 add_head_info(worktree);
106 done:
107 strbuf_release(&path);
108 strbuf_release(&worktree_path);
109 return worktree;
112 static void mark_current_worktree(struct worktree **worktrees)
114 char *git_dir = absolute_pathdup(get_git_dir());
115 int i;
117 for (i = 0; worktrees[i]; i++) {
118 struct worktree *wt = worktrees[i];
119 const char *wt_git_dir = get_worktree_git_dir(wt);
121 if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) {
122 wt->is_current = 1;
123 break;
126 free(git_dir);
130 * NEEDSWORK: This function exists so that we can look up metadata of a
131 * worktree without trying to access any of its internals like the refdb. It
132 * would be preferable to instead have a corruption-tolerant function for
133 * retrieving worktree metadata that could be used when the worktree is known
134 * to not be in a healthy state, e.g. when creating or repairing it.
136 static struct worktree **get_worktrees_internal(int skip_reading_head)
138 struct worktree **list = NULL;
139 struct strbuf path = STRBUF_INIT;
140 DIR *dir;
141 struct dirent *d;
142 int counter = 0, alloc = 2;
144 ALLOC_ARRAY(list, alloc);
146 list[counter++] = get_main_worktree(skip_reading_head);
148 strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
149 dir = opendir(path.buf);
150 strbuf_release(&path);
151 if (dir) {
152 while ((d = readdir_skip_dot_and_dotdot(dir)) != NULL) {
153 struct worktree *linked = NULL;
155 if ((linked = get_linked_worktree(d->d_name, skip_reading_head))) {
156 ALLOC_GROW(list, counter + 1, alloc);
157 list[counter++] = linked;
160 closedir(dir);
162 ALLOC_GROW(list, counter + 1, alloc);
163 list[counter] = NULL;
165 mark_current_worktree(list);
166 return list;
169 struct worktree **get_worktrees(void)
171 return get_worktrees_internal(0);
174 const char *get_worktree_git_dir(const struct worktree *wt)
176 if (!wt)
177 return get_git_dir();
178 else if (!wt->id)
179 return get_git_common_dir();
180 else
181 return git_common_path("worktrees/%s", wt->id);
184 static struct worktree *find_worktree_by_suffix(struct worktree **list,
185 const char *suffix)
187 struct worktree *found = NULL;
188 int nr_found = 0, suffixlen;
190 suffixlen = strlen(suffix);
191 if (!suffixlen)
192 return NULL;
194 for (; *list && nr_found < 2; list++) {
195 const char *path = (*list)->path;
196 int pathlen = strlen(path);
197 int start = pathlen - suffixlen;
199 /* suffix must start at directory boundary */
200 if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) &&
201 !fspathcmp(suffix, path + start)) {
202 found = *list;
203 nr_found++;
206 return nr_found == 1 ? found : NULL;
209 struct worktree *find_worktree(struct worktree **list,
210 const char *prefix,
211 const char *arg)
213 struct worktree *wt;
214 char *to_free = NULL;
216 if ((wt = find_worktree_by_suffix(list, arg)))
217 return wt;
219 if (prefix)
220 arg = to_free = prefix_filename(prefix, arg);
221 wt = find_worktree_by_path(list, arg);
222 free(to_free);
223 return wt;
226 struct worktree *find_worktree_by_path(struct worktree **list, const char *p)
228 struct strbuf wt_path = STRBUF_INIT;
229 char *path = real_pathdup(p, 0);
231 if (!path)
232 return NULL;
233 for (; *list; list++) {
234 if (!strbuf_realpath(&wt_path, (*list)->path, 0))
235 continue;
237 if (!fspathcmp(path, wt_path.buf))
238 break;
240 free(path);
241 strbuf_release(&wt_path);
242 return *list;
245 int is_main_worktree(const struct worktree *wt)
247 return !wt->id;
250 const char *worktree_lock_reason(struct worktree *wt)
252 if (is_main_worktree(wt))
253 return NULL;
255 if (!wt->lock_reason_valid) {
256 struct strbuf path = STRBUF_INIT;
258 strbuf_addstr(&path, worktree_git_path(wt, "locked"));
259 if (file_exists(path.buf)) {
260 struct strbuf lock_reason = STRBUF_INIT;
261 if (strbuf_read_file(&lock_reason, path.buf, 0) < 0)
262 die_errno(_("failed to read '%s'"), path.buf);
263 strbuf_trim(&lock_reason);
264 wt->lock_reason = strbuf_detach(&lock_reason, NULL);
265 } else
266 wt->lock_reason = NULL;
267 wt->lock_reason_valid = 1;
268 strbuf_release(&path);
271 return wt->lock_reason;
274 const char *worktree_prune_reason(struct worktree *wt, timestamp_t expire)
276 struct strbuf reason = STRBUF_INIT;
277 char *path = NULL;
279 if (is_main_worktree(wt))
280 return NULL;
281 if (wt->prune_reason_valid)
282 return wt->prune_reason;
284 if (should_prune_worktree(wt->id, &reason, &path, expire))
285 wt->prune_reason = strbuf_detach(&reason, NULL);
286 wt->prune_reason_valid = 1;
288 strbuf_release(&reason);
289 free(path);
290 return wt->prune_reason;
293 /* convenient wrapper to deal with NULL strbuf */
294 __attribute__((format (printf, 2, 3)))
295 static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...)
297 va_list params;
299 if (!buf)
300 return;
302 va_start(params, fmt);
303 strbuf_vaddf(buf, fmt, params);
304 va_end(params);
307 int validate_worktree(const struct worktree *wt, struct strbuf *errmsg,
308 unsigned flags)
310 struct strbuf wt_path = STRBUF_INIT;
311 struct strbuf realpath = STRBUF_INIT;
312 char *path = NULL;
313 int err, ret = -1;
315 strbuf_addf(&wt_path, "%s/.git", wt->path);
317 if (is_main_worktree(wt)) {
318 if (is_directory(wt_path.buf)) {
319 ret = 0;
320 goto done;
323 * Main worktree using .git file to point to the
324 * repository would make it impossible to know where
325 * the actual worktree is if this function is executed
326 * from another worktree. No .git file support for now.
328 strbuf_addf_gently(errmsg,
329 _("'%s' at main working tree is not the repository directory"),
330 wt_path.buf);
331 goto done;
335 * Make sure "gitdir" file points to a real .git file and that
336 * file points back here.
338 if (!is_absolute_path(wt->path)) {
339 strbuf_addf_gently(errmsg,
340 _("'%s' file does not contain absolute path to the working tree location"),
341 git_common_path("worktrees/%s/gitdir", wt->id));
342 goto done;
345 if (flags & WT_VALIDATE_WORKTREE_MISSING_OK &&
346 !file_exists(wt->path)) {
347 ret = 0;
348 goto done;
351 if (!file_exists(wt_path.buf)) {
352 strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf);
353 goto done;
356 path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err));
357 if (!path) {
358 strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"),
359 wt_path.buf, err);
360 goto done;
363 strbuf_realpath(&realpath, git_common_path("worktrees/%s", wt->id), 1);
364 ret = fspathcmp(path, realpath.buf);
366 if (ret)
367 strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"),
368 wt->path, git_common_path("worktrees/%s", wt->id));
369 done:
370 free(path);
371 strbuf_release(&wt_path);
372 strbuf_release(&realpath);
373 return ret;
376 void update_worktree_location(struct worktree *wt, const char *path_)
378 struct strbuf path = STRBUF_INIT;
380 if (is_main_worktree(wt))
381 BUG("can't relocate main worktree");
383 strbuf_realpath(&path, path_, 1);
384 if (fspathcmp(wt->path, path.buf)) {
385 write_file(git_common_path("worktrees/%s/gitdir", wt->id),
386 "%s/.git", path.buf);
387 free(wt->path);
388 wt->path = strbuf_detach(&path, NULL);
390 strbuf_release(&path);
393 int is_worktree_being_rebased(const struct worktree *wt,
394 const char *target)
396 struct wt_status_state state;
397 int found_rebase;
399 memset(&state, 0, sizeof(state));
400 found_rebase = wt_status_check_rebase(wt, &state) &&
401 (state.rebase_in_progress ||
402 state.rebase_interactive_in_progress) &&
403 state.branch &&
404 skip_prefix(target, "refs/heads/", &target) &&
405 !strcmp(state.branch, target);
406 wt_status_state_free_buffers(&state);
407 return found_rebase;
410 int is_worktree_being_bisected(const struct worktree *wt,
411 const char *target)
413 struct wt_status_state state;
414 int found_bisect;
416 memset(&state, 0, sizeof(state));
417 found_bisect = wt_status_check_bisect(wt, &state) &&
418 state.bisecting_from &&
419 skip_prefix(target, "refs/heads/", &target) &&
420 !strcmp(state.bisecting_from, target);
421 wt_status_state_free_buffers(&state);
422 return found_bisect;
426 * note: this function should be able to detect shared symref even if
427 * HEAD is temporarily detached (e.g. in the middle of rebase or
428 * bisect). New commands that do similar things should update this
429 * function as well.
431 int is_shared_symref(const struct worktree *wt, const char *symref,
432 const char *target)
434 const char *symref_target;
435 struct ref_store *refs;
436 int flags;
438 if (wt->is_bare)
439 return 0;
441 if (wt->is_detached && !strcmp(symref, "HEAD")) {
442 if (is_worktree_being_rebased(wt, target))
443 return 1;
444 if (is_worktree_being_bisected(wt, target))
445 return 1;
448 refs = get_worktree_ref_store(wt);
449 symref_target = refs_resolve_ref_unsafe(refs, symref, 0,
450 NULL, &flags);
451 if ((flags & REF_ISSYMREF) &&
452 symref_target && !strcmp(symref_target, target))
453 return 1;
455 return 0;
458 const struct worktree *find_shared_symref(struct worktree **worktrees,
459 const char *symref,
460 const char *target)
463 for (int i = 0; worktrees[i]; i++)
464 if (is_shared_symref(worktrees[i], symref, target))
465 return worktrees[i];
467 return NULL;
470 int submodule_uses_worktrees(const char *path)
472 char *submodule_gitdir;
473 struct strbuf sb = STRBUF_INIT, err = STRBUF_INIT;
474 DIR *dir;
475 struct dirent *d;
476 int ret = 0;
477 struct repository_format format = REPOSITORY_FORMAT_INIT;
479 submodule_gitdir = git_pathdup_submodule(path, "%s", "");
480 if (!submodule_gitdir)
481 return 0;
483 /* The env would be set for the superproject. */
484 get_common_dir_noenv(&sb, submodule_gitdir);
485 free(submodule_gitdir);
487 strbuf_addstr(&sb, "/config");
488 read_repository_format(&format, sb.buf);
489 if (verify_repository_format(&format, &err)) {
490 strbuf_release(&err);
491 strbuf_release(&sb);
492 clear_repository_format(&format);
493 return 1;
495 clear_repository_format(&format);
496 strbuf_release(&err);
498 /* Replace config by worktrees. */
499 strbuf_setlen(&sb, sb.len - strlen("config"));
500 strbuf_addstr(&sb, "worktrees");
502 /* See if there is any file inside the worktrees directory. */
503 dir = opendir(sb.buf);
504 strbuf_release(&sb);
506 if (!dir)
507 return 0;
509 d = readdir_skip_dot_and_dotdot(dir);
510 if (d)
511 ret = 1;
512 closedir(dir);
513 return ret;
516 void strbuf_worktree_ref(const struct worktree *wt,
517 struct strbuf *sb,
518 const char *refname)
520 if (parse_worktree_ref(refname, NULL, NULL, NULL) ==
521 REF_WORKTREE_CURRENT &&
522 wt && !wt->is_current) {
523 if (is_main_worktree(wt))
524 strbuf_addstr(sb, "main-worktree/");
525 else
526 strbuf_addf(sb, "worktrees/%s/", wt->id);
528 strbuf_addstr(sb, refname);
531 int other_head_refs(each_ref_fn fn, void *cb_data)
533 struct worktree **worktrees, **p;
534 struct strbuf refname = STRBUF_INIT;
535 int ret = 0;
537 worktrees = get_worktrees();
538 for (p = worktrees; *p; p++) {
539 struct worktree *wt = *p;
540 struct object_id oid;
541 int flag;
543 if (wt->is_current)
544 continue;
546 strbuf_reset(&refname);
547 strbuf_worktree_ref(wt, &refname, "HEAD");
548 if (refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
549 refname.buf,
550 RESOLVE_REF_READING,
551 &oid, &flag))
552 ret = fn(refname.buf, &oid, flag, cb_data);
553 if (ret)
554 break;
556 free_worktrees(worktrees);
557 strbuf_release(&refname);
558 return ret;
562 * Repair worktree's /path/to/worktree/.git file if missing, corrupt, or not
563 * pointing at <repo>/worktrees/<id>.
565 static void repair_gitfile(struct worktree *wt,
566 worktree_repair_fn fn, void *cb_data)
568 struct strbuf dotgit = STRBUF_INIT;
569 struct strbuf repo = STRBUF_INIT;
570 char *backlink;
571 const char *repair = NULL;
572 int err;
574 /* missing worktree can't be repaired */
575 if (!file_exists(wt->path))
576 return;
578 if (!is_directory(wt->path)) {
579 fn(1, wt->path, _("not a directory"), cb_data);
580 return;
583 strbuf_realpath(&repo, git_common_path("worktrees/%s", wt->id), 1);
584 strbuf_addf(&dotgit, "%s/.git", wt->path);
585 backlink = xstrdup_or_null(read_gitfile_gently(dotgit.buf, &err));
587 if (err == READ_GITFILE_ERR_NOT_A_FILE)
588 fn(1, wt->path, _(".git is not a file"), cb_data);
589 else if (err)
590 repair = _(".git file broken");
591 else if (fspathcmp(backlink, repo.buf))
592 repair = _(".git file incorrect");
594 if (repair) {
595 fn(0, wt->path, repair, cb_data);
596 write_file(dotgit.buf, "gitdir: %s", repo.buf);
599 free(backlink);
600 strbuf_release(&repo);
601 strbuf_release(&dotgit);
604 static void repair_noop(int iserr UNUSED,
605 const char *path UNUSED,
606 const char *msg UNUSED,
607 void *cb_data UNUSED)
609 /* nothing */
612 void repair_worktrees(worktree_repair_fn fn, void *cb_data)
614 struct worktree **worktrees = get_worktrees_internal(1);
615 struct worktree **wt = worktrees + 1; /* +1 skips main worktree */
617 if (!fn)
618 fn = repair_noop;
619 for (; *wt; wt++)
620 repair_gitfile(*wt, fn, cb_data);
621 free_worktrees(worktrees);
624 static int is_main_worktree_path(const char *path)
626 struct strbuf target = STRBUF_INIT;
627 struct strbuf maindir = STRBUF_INIT;
628 int cmp;
630 strbuf_add_real_path(&target, path);
631 strbuf_strip_suffix(&target, "/.git");
632 strbuf_add_real_path(&maindir, get_git_common_dir());
633 strbuf_strip_suffix(&maindir, "/.git");
634 cmp = fspathcmp(maindir.buf, target.buf);
636 strbuf_release(&maindir);
637 strbuf_release(&target);
638 return !cmp;
642 * If both the main worktree and linked worktree have been moved, then the
643 * gitfile /path/to/worktree/.git won't point into the repository, thus we
644 * won't know which <repo>/worktrees/<id>/gitdir to repair. However, we may
645 * be able to infer the gitdir by manually reading /path/to/worktree/.git,
646 * extracting the <id>, and checking if <repo>/worktrees/<id> exists.
648 static char *infer_backlink(const char *gitfile)
650 struct strbuf actual = STRBUF_INIT;
651 struct strbuf inferred = STRBUF_INIT;
652 const char *id;
654 if (strbuf_read_file(&actual, gitfile, 0) < 0)
655 goto error;
656 if (!starts_with(actual.buf, "gitdir:"))
657 goto error;
658 if (!(id = find_last_dir_sep(actual.buf)))
659 goto error;
660 strbuf_trim(&actual);
661 id++; /* advance past '/' to point at <id> */
662 if (!*id)
663 goto error;
664 strbuf_git_common_path(&inferred, the_repository, "worktrees/%s", id);
665 if (!is_directory(inferred.buf))
666 goto error;
668 strbuf_release(&actual);
669 return strbuf_detach(&inferred, NULL);
671 error:
672 strbuf_release(&actual);
673 strbuf_release(&inferred);
674 return NULL;
678 * Repair <repo>/worktrees/<id>/gitdir if missing, corrupt, or not pointing at
679 * the worktree's path.
681 void repair_worktree_at_path(const char *path,
682 worktree_repair_fn fn, void *cb_data)
684 struct strbuf dotgit = STRBUF_INIT;
685 struct strbuf realdotgit = STRBUF_INIT;
686 struct strbuf gitdir = STRBUF_INIT;
687 struct strbuf olddotgit = STRBUF_INIT;
688 char *backlink = NULL;
689 const char *repair = NULL;
690 int err;
692 if (!fn)
693 fn = repair_noop;
695 if (is_main_worktree_path(path))
696 goto done;
698 strbuf_addf(&dotgit, "%s/.git", path);
699 if (!strbuf_realpath(&realdotgit, dotgit.buf, 0)) {
700 fn(1, path, _("not a valid path"), cb_data);
701 goto done;
704 backlink = xstrdup_or_null(read_gitfile_gently(realdotgit.buf, &err));
705 if (err == READ_GITFILE_ERR_NOT_A_FILE) {
706 fn(1, realdotgit.buf, _("unable to locate repository; .git is not a file"), cb_data);
707 goto done;
708 } else if (err == READ_GITFILE_ERR_NOT_A_REPO) {
709 if (!(backlink = infer_backlink(realdotgit.buf))) {
710 fn(1, realdotgit.buf, _("unable to locate repository; .git file does not reference a repository"), cb_data);
711 goto done;
713 } else if (err) {
714 fn(1, realdotgit.buf, _("unable to locate repository; .git file broken"), cb_data);
715 goto done;
718 strbuf_addf(&gitdir, "%s/gitdir", backlink);
719 if (strbuf_read_file(&olddotgit, gitdir.buf, 0) < 0)
720 repair = _("gitdir unreadable");
721 else {
722 strbuf_rtrim(&olddotgit);
723 if (fspathcmp(olddotgit.buf, realdotgit.buf))
724 repair = _("gitdir incorrect");
727 if (repair) {
728 fn(0, gitdir.buf, repair, cb_data);
729 write_file(gitdir.buf, "%s", realdotgit.buf);
731 done:
732 free(backlink);
733 strbuf_release(&olddotgit);
734 strbuf_release(&gitdir);
735 strbuf_release(&realdotgit);
736 strbuf_release(&dotgit);
739 int should_prune_worktree(const char *id, struct strbuf *reason, char **wtpath, timestamp_t expire)
741 struct stat st;
742 char *path;
743 int fd;
744 size_t len;
745 ssize_t read_result;
747 *wtpath = NULL;
748 if (!is_directory(git_path("worktrees/%s", id))) {
749 strbuf_addstr(reason, _("not a valid directory"));
750 return 1;
752 if (file_exists(git_path("worktrees/%s/locked", id)))
753 return 0;
754 if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
755 strbuf_addstr(reason, _("gitdir file does not exist"));
756 return 1;
758 fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
759 if (fd < 0) {
760 strbuf_addf(reason, _("unable to read gitdir file (%s)"),
761 strerror(errno));
762 return 1;
764 len = xsize_t(st.st_size);
765 path = xmallocz(len);
767 read_result = read_in_full(fd, path, len);
768 if (read_result < 0) {
769 strbuf_addf(reason, _("unable to read gitdir file (%s)"),
770 strerror(errno));
771 close(fd);
772 free(path);
773 return 1;
775 close(fd);
777 if (read_result != len) {
778 strbuf_addf(reason,
779 _("short read (expected %"PRIuMAX" bytes, read %"PRIuMAX")"),
780 (uintmax_t)len, (uintmax_t)read_result);
781 free(path);
782 return 1;
784 while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
785 len--;
786 if (!len) {
787 strbuf_addstr(reason, _("invalid gitdir file"));
788 free(path);
789 return 1;
791 path[len] = '\0';
792 if (!file_exists(path)) {
793 if (stat(git_path("worktrees/%s/index", id), &st) ||
794 st.st_mtime <= expire) {
795 strbuf_addstr(reason, _("gitdir file points to non-existent location"));
796 free(path);
797 return 1;
798 } else {
799 *wtpath = path;
800 return 0;
803 *wtpath = path;
804 return 0;
807 static int move_config_setting(const char *key, const char *value,
808 const char *from_file, const char *to_file)
810 if (git_config_set_in_file_gently(to_file, key, NULL, value))
811 return error(_("unable to set %s in '%s'"), key, to_file);
812 if (git_config_set_in_file_gently(from_file, key, NULL, NULL))
813 return error(_("unable to unset %s in '%s'"), key, from_file);
814 return 0;
817 int init_worktree_config(struct repository *r)
819 int res = 0;
820 int bare = 0;
821 struct config_set cs = { { 0 } };
822 const char *core_worktree;
823 char *common_config_file;
824 char *main_worktree_file;
827 * If the extension is already enabled, then we can skip the
828 * upgrade process.
830 if (r->repository_format_worktree_config)
831 return 0;
832 if ((res = git_config_set_gently("extensions.worktreeConfig", "true")))
833 return error(_("failed to set extensions.worktreeConfig setting"));
835 common_config_file = xstrfmt("%s/config", r->commondir);
836 main_worktree_file = xstrfmt("%s/config.worktree", r->commondir);
838 git_configset_init(&cs);
839 git_configset_add_file(&cs, common_config_file);
842 * If core.bare is true in the common config file, then we need to
843 * move it to the main worktree's config file or it will break all
844 * worktrees. If it is false, then leave it in place because it
845 * _could_ be negating a global core.bare=true.
847 if (!git_configset_get_bool(&cs, "core.bare", &bare) && bare) {
848 if ((res = move_config_setting("core.bare", "true",
849 common_config_file,
850 main_worktree_file)))
851 goto cleanup;
854 * If core.worktree is set, then the main worktree is located
855 * somewhere different than the parent of the common Git dir.
856 * Relocate that value to avoid breaking all worktrees with this
857 * upgrade to worktree config.
859 if (!git_configset_get_value(&cs, "core.worktree", &core_worktree, NULL)) {
860 if ((res = move_config_setting("core.worktree", core_worktree,
861 common_config_file,
862 main_worktree_file)))
863 goto cleanup;
867 * Ensure that we use worktree config for the remaining lifetime
868 * of the current process.
870 r->repository_format_worktree_config = 1;
872 cleanup:
873 git_configset_clear(&cs);
874 free(common_config_file);
875 free(main_worktree_file);
876 return res;