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1 | #include "cache.h" | |
2 | #include "repository.h" | |
3 | #include "refs.h" | |
4 | #include "strbuf.h" | |
5 | #include "worktree.h" | |
6 | #include "dir.h" | |
7 | #include "wt-status.h" | |
8 | ||
9 | void free_worktrees(struct worktree **worktrees) | |
10 | { | |
11 | int i = 0; | |
12 | ||
13 | for (i = 0; worktrees[i]; i++) { | |
14 | free(worktrees[i]->path); | |
15 | free(worktrees[i]->id); | |
16 | free(worktrees[i]->head_ref); | |
17 | free(worktrees[i]->lock_reason); | |
18 | free(worktrees[i]); | |
19 | } | |
20 | free (worktrees); | |
21 | } | |
22 | ||
23 | /** | |
24 | * Update head_sha1, head_ref and is_detached of the given worktree | |
25 | */ | |
26 | static void add_head_info(struct worktree *wt) | |
27 | { | |
28 | int flags; | |
29 | const char *target; | |
30 | ||
31 | target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt), | |
32 | "HEAD", | |
33 | 0, | |
34 | &wt->head_oid, &flags); | |
35 | if (!target) | |
36 | return; | |
37 | ||
38 | if (flags & REF_ISSYMREF) | |
39 | wt->head_ref = xstrdup(target); | |
40 | else | |
41 | wt->is_detached = 1; | |
42 | } | |
43 | ||
44 | /** | |
45 | * get the main worktree | |
46 | */ | |
47 | static struct worktree *get_main_worktree(void) | |
48 | { | |
49 | struct worktree *worktree = NULL; | |
50 | struct strbuf worktree_path = STRBUF_INIT; | |
51 | ||
52 | strbuf_add_absolute_path(&worktree_path, get_git_common_dir()); | |
53 | strbuf_strip_suffix(&worktree_path, "/."); | |
54 | if (!strbuf_strip_suffix(&worktree_path, "/.git")) | |
55 | strbuf_strip_suffix(&worktree_path, "/."); | |
56 | ||
57 | worktree = xcalloc(1, sizeof(*worktree)); | |
58 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
59 | /* | |
60 | * NEEDSWORK: If this function is called from a secondary worktree and | |
61 | * config.worktree is present, is_bare_repository_cfg will reflect the | |
62 | * contents of config.worktree, not the contents of the main worktree. | |
63 | * This means that worktree->is_bare may be set to 0 even if the main | |
64 | * worktree is configured to be bare. | |
65 | */ | |
66 | worktree->is_bare = (is_bare_repository_cfg == 1) || | |
67 | is_bare_repository(); | |
68 | add_head_info(worktree); | |
69 | ||
70 | strbuf_release(&worktree_path); | |
71 | return worktree; | |
72 | } | |
73 | ||
74 | static struct worktree *get_linked_worktree(const char *id) | |
75 | { | |
76 | struct worktree *worktree = NULL; | |
77 | struct strbuf path = STRBUF_INIT; | |
78 | struct strbuf worktree_path = STRBUF_INIT; | |
79 | ||
80 | if (!id) | |
81 | die("Missing linked worktree name"); | |
82 | ||
83 | strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id); | |
84 | if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0) | |
85 | /* invalid gitdir file */ | |
86 | goto done; | |
87 | ||
88 | strbuf_rtrim(&worktree_path); | |
89 | if (!strbuf_strip_suffix(&worktree_path, "/.git")) { | |
90 | strbuf_reset(&worktree_path); | |
91 | strbuf_add_absolute_path(&worktree_path, "."); | |
92 | strbuf_strip_suffix(&worktree_path, "/."); | |
93 | } | |
94 | ||
95 | strbuf_reset(&path); | |
96 | strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id); | |
97 | ||
98 | worktree = xcalloc(1, sizeof(*worktree)); | |
99 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
100 | worktree->id = xstrdup(id); | |
101 | add_head_info(worktree); | |
102 | ||
103 | done: | |
104 | strbuf_release(&path); | |
105 | strbuf_release(&worktree_path); | |
106 | return worktree; | |
107 | } | |
108 | ||
109 | static void mark_current_worktree(struct worktree **worktrees) | |
110 | { | |
111 | char *git_dir = absolute_pathdup(get_git_dir()); | |
112 | int i; | |
113 | ||
114 | for (i = 0; worktrees[i]; i++) { | |
115 | struct worktree *wt = worktrees[i]; | |
116 | const char *wt_git_dir = get_worktree_git_dir(wt); | |
117 | ||
118 | if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) { | |
119 | wt->is_current = 1; | |
120 | break; | |
121 | } | |
122 | } | |
123 | free(git_dir); | |
124 | } | |
125 | ||
126 | static int compare_worktree(const void *a_, const void *b_) | |
127 | { | |
128 | const struct worktree *const *a = a_; | |
129 | const struct worktree *const *b = b_; | |
130 | return fspathcmp((*a)->path, (*b)->path); | |
131 | } | |
132 | ||
133 | struct worktree **get_worktrees(unsigned flags) | |
134 | { | |
135 | struct worktree **list = NULL; | |
136 | struct strbuf path = STRBUF_INIT; | |
137 | DIR *dir; | |
138 | struct dirent *d; | |
139 | int counter = 0, alloc = 2; | |
140 | ||
141 | ALLOC_ARRAY(list, alloc); | |
142 | ||
143 | list[counter++] = get_main_worktree(); | |
144 | ||
145 | strbuf_addf(&path, "%s/worktrees", get_git_common_dir()); | |
146 | dir = opendir(path.buf); | |
147 | strbuf_release(&path); | |
148 | if (dir) { | |
149 | while ((d = readdir(dir)) != NULL) { | |
150 | struct worktree *linked = NULL; | |
151 | if (is_dot_or_dotdot(d->d_name)) | |
152 | continue; | |
153 | ||
154 | if ((linked = get_linked_worktree(d->d_name))) { | |
155 | ALLOC_GROW(list, counter + 1, alloc); | |
156 | list[counter++] = linked; | |
157 | } | |
158 | } | |
159 | closedir(dir); | |
160 | } | |
161 | ALLOC_GROW(list, counter + 1, alloc); | |
162 | list[counter] = NULL; | |
163 | ||
164 | if (flags & GWT_SORT_LINKED) | |
165 | /* | |
166 | * don't sort the first item (main worktree), which will | |
167 | * always be the first | |
168 | */ | |
169 | QSORT(list + 1, counter - 1, compare_worktree); | |
170 | ||
171 | mark_current_worktree(list); | |
172 | return list; | |
173 | } | |
174 | ||
175 | const char *get_worktree_git_dir(const struct worktree *wt) | |
176 | { | |
177 | if (!wt) | |
178 | return get_git_dir(); | |
179 | else if (!wt->id) | |
180 | return get_git_common_dir(); | |
181 | else | |
182 | return git_common_path("worktrees/%s", wt->id); | |
183 | } | |
184 | ||
185 | static struct worktree *find_worktree_by_suffix(struct worktree **list, | |
186 | const char *suffix) | |
187 | { | |
188 | struct worktree *found = NULL; | |
189 | int nr_found = 0, suffixlen; | |
190 | ||
191 | suffixlen = strlen(suffix); | |
192 | if (!suffixlen) | |
193 | return NULL; | |
194 | ||
195 | for (; *list && nr_found < 2; list++) { | |
196 | const char *path = (*list)->path; | |
197 | int pathlen = strlen(path); | |
198 | int start = pathlen - suffixlen; | |
199 | ||
200 | /* suffix must start at directory boundary */ | |
201 | if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) && | |
202 | !fspathcmp(suffix, path + start)) { | |
203 | found = *list; | |
204 | nr_found++; | |
205 | } | |
206 | } | |
207 | return nr_found == 1 ? found : NULL; | |
208 | } | |
209 | ||
210 | struct worktree *find_worktree(struct worktree **list, | |
211 | const char *prefix, | |
212 | const char *arg) | |
213 | { | |
214 | struct worktree *wt; | |
215 | char *to_free = NULL; | |
216 | ||
217 | if ((wt = find_worktree_by_suffix(list, arg))) | |
218 | return wt; | |
219 | ||
220 | if (prefix) | |
221 | arg = to_free = prefix_filename(prefix, arg); | |
222 | wt = find_worktree_by_path(list, arg); | |
223 | free(to_free); | |
224 | return wt; | |
225 | } | |
226 | ||
227 | struct worktree *find_worktree_by_path(struct worktree **list, const char *p) | |
228 | { | |
229 | struct strbuf wt_path = STRBUF_INIT; | |
230 | char *path = real_pathdup(p, 0); | |
231 | ||
232 | if (!path) | |
233 | return NULL; | |
234 | for (; *list; list++) { | |
235 | if (!strbuf_realpath(&wt_path, (*list)->path, 0)) | |
236 | continue; | |
237 | ||
238 | if (!fspathcmp(path, wt_path.buf)) | |
239 | break; | |
240 | } | |
241 | free(path); | |
242 | strbuf_release(&wt_path); | |
243 | return *list; | |
244 | } | |
245 | ||
246 | int is_main_worktree(const struct worktree *wt) | |
247 | { | |
248 | return !wt->id; | |
249 | } | |
250 | ||
251 | const char *worktree_lock_reason(struct worktree *wt) | |
252 | { | |
253 | assert(!is_main_worktree(wt)); | |
254 | ||
255 | if (!wt->lock_reason_valid) { | |
256 | struct strbuf path = STRBUF_INIT; | |
257 | ||
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); | |
269 | } | |
270 | ||
271 | return wt->lock_reason; | |
272 | } | |
273 | ||
274 | /* convenient wrapper to deal with NULL strbuf */ | |
275 | static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...) | |
276 | { | |
277 | va_list params; | |
278 | ||
279 | if (!buf) | |
280 | return; | |
281 | ||
282 | va_start(params, fmt); | |
283 | strbuf_vaddf(buf, fmt, params); | |
284 | va_end(params); | |
285 | } | |
286 | ||
287 | int validate_worktree(const struct worktree *wt, struct strbuf *errmsg, | |
288 | unsigned flags) | |
289 | { | |
290 | struct strbuf wt_path = STRBUF_INIT; | |
291 | struct strbuf realpath = STRBUF_INIT; | |
292 | char *path = NULL; | |
293 | int err, ret = -1; | |
294 | ||
295 | strbuf_addf(&wt_path, "%s/.git", wt->path); | |
296 | ||
297 | if (is_main_worktree(wt)) { | |
298 | if (is_directory(wt_path.buf)) { | |
299 | ret = 0; | |
300 | goto done; | |
301 | } | |
302 | /* | |
303 | * Main worktree using .git file to point to the | |
304 | * repository would make it impossible to know where | |
305 | * the actual worktree is if this function is executed | |
306 | * from another worktree. No .git file support for now. | |
307 | */ | |
308 | strbuf_addf_gently(errmsg, | |
309 | _("'%s' at main working tree is not the repository directory"), | |
310 | wt_path.buf); | |
311 | goto done; | |
312 | } | |
313 | ||
314 | /* | |
315 | * Make sure "gitdir" file points to a real .git file and that | |
316 | * file points back here. | |
317 | */ | |
318 | if (!is_absolute_path(wt->path)) { | |
319 | strbuf_addf_gently(errmsg, | |
320 | _("'%s' file does not contain absolute path to the working tree location"), | |
321 | git_common_path("worktrees/%s/gitdir", wt->id)); | |
322 | goto done; | |
323 | } | |
324 | ||
325 | if (flags & WT_VALIDATE_WORKTREE_MISSING_OK && | |
326 | !file_exists(wt->path)) { | |
327 | ret = 0; | |
328 | goto done; | |
329 | } | |
330 | ||
331 | if (!file_exists(wt_path.buf)) { | |
332 | strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf); | |
333 | goto done; | |
334 | } | |
335 | ||
336 | path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err)); | |
337 | if (!path) { | |
338 | strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"), | |
339 | wt_path.buf, err); | |
340 | goto done; | |
341 | } | |
342 | ||
343 | strbuf_realpath(&realpath, git_common_path("worktrees/%s", wt->id), 1); | |
344 | ret = fspathcmp(path, realpath.buf); | |
345 | ||
346 | if (ret) | |
347 | strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"), | |
348 | wt->path, git_common_path("worktrees/%s", wt->id)); | |
349 | done: | |
350 | free(path); | |
351 | strbuf_release(&wt_path); | |
352 | strbuf_release(&realpath); | |
353 | return ret; | |
354 | } | |
355 | ||
356 | void update_worktree_location(struct worktree *wt, const char *path_) | |
357 | { | |
358 | struct strbuf path = STRBUF_INIT; | |
359 | ||
360 | if (is_main_worktree(wt)) | |
361 | BUG("can't relocate main worktree"); | |
362 | ||
363 | strbuf_realpath(&path, path_, 1); | |
364 | if (fspathcmp(wt->path, path.buf)) { | |
365 | write_file(git_common_path("worktrees/%s/gitdir", wt->id), | |
366 | "%s/.git", path.buf); | |
367 | free(wt->path); | |
368 | wt->path = strbuf_detach(&path, NULL); | |
369 | } | |
370 | strbuf_release(&path); | |
371 | } | |
372 | ||
373 | int is_worktree_being_rebased(const struct worktree *wt, | |
374 | const char *target) | |
375 | { | |
376 | struct wt_status_state state; | |
377 | int found_rebase; | |
378 | ||
379 | memset(&state, 0, sizeof(state)); | |
380 | found_rebase = wt_status_check_rebase(wt, &state) && | |
381 | ((state.rebase_in_progress || | |
382 | state.rebase_interactive_in_progress) && | |
383 | state.branch && | |
384 | starts_with(target, "refs/heads/") && | |
385 | !strcmp(state.branch, target + strlen("refs/heads/"))); | |
386 | free(state.branch); | |
387 | free(state.onto); | |
388 | return found_rebase; | |
389 | } | |
390 | ||
391 | int is_worktree_being_bisected(const struct worktree *wt, | |
392 | const char *target) | |
393 | { | |
394 | struct wt_status_state state; | |
395 | int found_rebase; | |
396 | ||
397 | memset(&state, 0, sizeof(state)); | |
398 | found_rebase = wt_status_check_bisect(wt, &state) && | |
399 | state.branch && | |
400 | starts_with(target, "refs/heads/") && | |
401 | !strcmp(state.branch, target + strlen("refs/heads/")); | |
402 | free(state.branch); | |
403 | return found_rebase; | |
404 | } | |
405 | ||
406 | /* | |
407 | * note: this function should be able to detect shared symref even if | |
408 | * HEAD is temporarily detached (e.g. in the middle of rebase or | |
409 | * bisect). New commands that do similar things should update this | |
410 | * function as well. | |
411 | */ | |
412 | const struct worktree *find_shared_symref(const char *symref, | |
413 | const char *target) | |
414 | { | |
415 | const struct worktree *existing = NULL; | |
416 | static struct worktree **worktrees; | |
417 | int i = 0; | |
418 | ||
419 | if (worktrees) | |
420 | free_worktrees(worktrees); | |
421 | worktrees = get_worktrees(0); | |
422 | ||
423 | for (i = 0; worktrees[i]; i++) { | |
424 | struct worktree *wt = worktrees[i]; | |
425 | const char *symref_target; | |
426 | struct ref_store *refs; | |
427 | int flags; | |
428 | ||
429 | if (wt->is_bare) | |
430 | continue; | |
431 | ||
432 | if (wt->is_detached && !strcmp(symref, "HEAD")) { | |
433 | if (is_worktree_being_rebased(wt, target)) { | |
434 | existing = wt; | |
435 | break; | |
436 | } | |
437 | if (is_worktree_being_bisected(wt, target)) { | |
438 | existing = wt; | |
439 | break; | |
440 | } | |
441 | } | |
442 | ||
443 | refs = get_worktree_ref_store(wt); | |
444 | symref_target = refs_resolve_ref_unsafe(refs, symref, 0, | |
445 | NULL, &flags); | |
446 | if ((flags & REF_ISSYMREF) && | |
447 | symref_target && !strcmp(symref_target, target)) { | |
448 | existing = wt; | |
449 | break; | |
450 | } | |
451 | } | |
452 | ||
453 | return existing; | |
454 | } | |
455 | ||
456 | int submodule_uses_worktrees(const char *path) | |
457 | { | |
458 | char *submodule_gitdir; | |
459 | struct strbuf sb = STRBUF_INIT, err = STRBUF_INIT; | |
460 | DIR *dir; | |
461 | struct dirent *d; | |
462 | int ret = 0; | |
463 | struct repository_format format = REPOSITORY_FORMAT_INIT; | |
464 | ||
465 | submodule_gitdir = git_pathdup_submodule(path, "%s", ""); | |
466 | if (!submodule_gitdir) | |
467 | return 0; | |
468 | ||
469 | /* The env would be set for the superproject. */ | |
470 | get_common_dir_noenv(&sb, submodule_gitdir); | |
471 | free(submodule_gitdir); | |
472 | ||
473 | strbuf_addstr(&sb, "/config"); | |
474 | read_repository_format(&format, sb.buf); | |
475 | if (verify_repository_format(&format, &err)) { | |
476 | strbuf_release(&err); | |
477 | strbuf_release(&sb); | |
478 | clear_repository_format(&format); | |
479 | return 1; | |
480 | } | |
481 | clear_repository_format(&format); | |
482 | strbuf_release(&err); | |
483 | ||
484 | /* Replace config by worktrees. */ | |
485 | strbuf_setlen(&sb, sb.len - strlen("config")); | |
486 | strbuf_addstr(&sb, "worktrees"); | |
487 | ||
488 | /* See if there is any file inside the worktrees directory. */ | |
489 | dir = opendir(sb.buf); | |
490 | strbuf_release(&sb); | |
491 | ||
492 | if (!dir) | |
493 | return 0; | |
494 | ||
495 | while ((d = readdir(dir)) != NULL) { | |
496 | if (is_dot_or_dotdot(d->d_name)) | |
497 | continue; | |
498 | ||
499 | ret = 1; | |
500 | break; | |
501 | } | |
502 | closedir(dir); | |
503 | return ret; | |
504 | } | |
505 | ||
506 | int parse_worktree_ref(const char *worktree_ref, const char **name, | |
507 | int *name_length, const char **ref) | |
508 | { | |
509 | if (skip_prefix(worktree_ref, "main-worktree/", &worktree_ref)) { | |
510 | if (!*worktree_ref) | |
511 | return -1; | |
512 | if (name) | |
513 | *name = NULL; | |
514 | if (name_length) | |
515 | *name_length = 0; | |
516 | if (ref) | |
517 | *ref = worktree_ref; | |
518 | return 0; | |
519 | } | |
520 | if (skip_prefix(worktree_ref, "worktrees/", &worktree_ref)) { | |
521 | const char *slash = strchr(worktree_ref, '/'); | |
522 | ||
523 | if (!slash || slash == worktree_ref || !slash[1]) | |
524 | return -1; | |
525 | if (name) | |
526 | *name = worktree_ref; | |
527 | if (name_length) | |
528 | *name_length = slash - worktree_ref; | |
529 | if (ref) | |
530 | *ref = slash + 1; | |
531 | return 0; | |
532 | } | |
533 | return -1; | |
534 | } | |
535 | ||
536 | void strbuf_worktree_ref(const struct worktree *wt, | |
537 | struct strbuf *sb, | |
538 | const char *refname) | |
539 | { | |
540 | switch (ref_type(refname)) { | |
541 | case REF_TYPE_PSEUDOREF: | |
542 | case REF_TYPE_PER_WORKTREE: | |
543 | if (wt && !wt->is_current) { | |
544 | if (is_main_worktree(wt)) | |
545 | strbuf_addstr(sb, "main-worktree/"); | |
546 | else | |
547 | strbuf_addf(sb, "worktrees/%s/", wt->id); | |
548 | } | |
549 | break; | |
550 | ||
551 | case REF_TYPE_MAIN_PSEUDOREF: | |
552 | case REF_TYPE_OTHER_PSEUDOREF: | |
553 | break; | |
554 | ||
555 | case REF_TYPE_NORMAL: | |
556 | /* | |
557 | * For shared refs, don't prefix worktrees/ or | |
558 | * main-worktree/. It's not necessary and | |
559 | * files-backend.c can't handle it anyway. | |
560 | */ | |
561 | break; | |
562 | } | |
563 | strbuf_addstr(sb, refname); | |
564 | } | |
565 | ||
566 | const char *worktree_ref(const struct worktree *wt, const char *refname) | |
567 | { | |
568 | static struct strbuf sb = STRBUF_INIT; | |
569 | ||
570 | strbuf_reset(&sb); | |
571 | strbuf_worktree_ref(wt, &sb, refname); | |
572 | return sb.buf; | |
573 | } | |
574 | ||
575 | int other_head_refs(each_ref_fn fn, void *cb_data) | |
576 | { | |
577 | struct worktree **worktrees, **p; | |
578 | int ret = 0; | |
579 | ||
580 | worktrees = get_worktrees(0); | |
581 | for (p = worktrees; *p; p++) { | |
582 | struct worktree *wt = *p; | |
583 | struct object_id oid; | |
584 | int flag; | |
585 | ||
586 | if (wt->is_current) | |
587 | continue; | |
588 | ||
589 | if (!refs_read_ref_full(get_main_ref_store(the_repository), | |
590 | worktree_ref(wt, "HEAD"), | |
591 | RESOLVE_REF_READING, | |
592 | &oid, &flag)) | |
593 | ret = fn(worktree_ref(wt, "HEAD"), &oid, flag, cb_data); | |
594 | if (ret) | |
595 | break; | |
596 | } | |
597 | free_worktrees(worktrees); | |
598 | return ret; | |
599 | } |