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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_real_path(&worktree_path, get_git_common_dir()); | |
53 | strbuf_strip_suffix(&worktree_path, "/.git"); | |
54 | ||
55 | worktree = xcalloc(1, sizeof(*worktree)); | |
56 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
57 | /* | |
58 | * NEEDSWORK: If this function is called from a secondary worktree and | |
59 | * config.worktree is present, is_bare_repository_cfg will reflect the | |
60 | * contents of config.worktree, not the contents of the main worktree. | |
61 | * This means that worktree->is_bare may be set to 0 even if the main | |
62 | * worktree is configured to be bare. | |
63 | */ | |
64 | worktree->is_bare = (is_bare_repository_cfg == 1) || | |
65 | is_bare_repository(); | |
66 | add_head_info(worktree); | |
67 | return worktree; | |
68 | } | |
69 | ||
70 | static struct worktree *get_linked_worktree(const char *id) | |
71 | { | |
72 | struct worktree *worktree = NULL; | |
73 | struct strbuf path = STRBUF_INIT; | |
74 | struct strbuf worktree_path = STRBUF_INIT; | |
75 | ||
76 | if (!id) | |
77 | die("Missing linked worktree name"); | |
78 | ||
79 | strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id); | |
80 | if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0) | |
81 | /* invalid gitdir file */ | |
82 | goto done; | |
83 | strbuf_rtrim(&worktree_path); | |
84 | strbuf_strip_suffix(&worktree_path, "/.git"); | |
85 | ||
86 | worktree = xcalloc(1, sizeof(*worktree)); | |
87 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
88 | worktree->id = xstrdup(id); | |
89 | add_head_info(worktree); | |
90 | ||
91 | done: | |
92 | strbuf_release(&path); | |
93 | strbuf_release(&worktree_path); | |
94 | return worktree; | |
95 | } | |
96 | ||
97 | static void mark_current_worktree(struct worktree **worktrees) | |
98 | { | |
99 | char *git_dir = absolute_pathdup(get_git_dir()); | |
100 | int i; | |
101 | ||
102 | for (i = 0; worktrees[i]; i++) { | |
103 | struct worktree *wt = worktrees[i]; | |
104 | const char *wt_git_dir = get_worktree_git_dir(wt); | |
105 | ||
106 | if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) { | |
107 | wt->is_current = 1; | |
108 | break; | |
109 | } | |
110 | } | |
111 | free(git_dir); | |
112 | } | |
113 | ||
114 | struct worktree **get_worktrees(void) | |
115 | { | |
116 | struct worktree **list = NULL; | |
117 | struct strbuf path = STRBUF_INIT; | |
118 | DIR *dir; | |
119 | struct dirent *d; | |
120 | int counter = 0, alloc = 2; | |
121 | ||
122 | ALLOC_ARRAY(list, alloc); | |
123 | ||
124 | list[counter++] = get_main_worktree(); | |
125 | ||
126 | strbuf_addf(&path, "%s/worktrees", get_git_common_dir()); | |
127 | dir = opendir(path.buf); | |
128 | strbuf_release(&path); | |
129 | if (dir) { | |
130 | while ((d = readdir(dir)) != NULL) { | |
131 | struct worktree *linked = NULL; | |
132 | if (is_dot_or_dotdot(d->d_name)) | |
133 | continue; | |
134 | ||
135 | if ((linked = get_linked_worktree(d->d_name))) { | |
136 | ALLOC_GROW(list, counter + 1, alloc); | |
137 | list[counter++] = linked; | |
138 | } | |
139 | } | |
140 | closedir(dir); | |
141 | } | |
142 | ALLOC_GROW(list, counter + 1, alloc); | |
143 | list[counter] = NULL; | |
144 | ||
145 | mark_current_worktree(list); | |
146 | return list; | |
147 | } | |
148 | ||
149 | const char *get_worktree_git_dir(const struct worktree *wt) | |
150 | { | |
151 | if (!wt) | |
152 | return get_git_dir(); | |
153 | else if (!wt->id) | |
154 | return get_git_common_dir(); | |
155 | else | |
156 | return git_common_path("worktrees/%s", wt->id); | |
157 | } | |
158 | ||
159 | static struct worktree *find_worktree_by_suffix(struct worktree **list, | |
160 | const char *suffix) | |
161 | { | |
162 | struct worktree *found = NULL; | |
163 | int nr_found = 0, suffixlen; | |
164 | ||
165 | suffixlen = strlen(suffix); | |
166 | if (!suffixlen) | |
167 | return NULL; | |
168 | ||
169 | for (; *list && nr_found < 2; list++) { | |
170 | const char *path = (*list)->path; | |
171 | int pathlen = strlen(path); | |
172 | int start = pathlen - suffixlen; | |
173 | ||
174 | /* suffix must start at directory boundary */ | |
175 | if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) && | |
176 | !fspathcmp(suffix, path + start)) { | |
177 | found = *list; | |
178 | nr_found++; | |
179 | } | |
180 | } | |
181 | return nr_found == 1 ? found : NULL; | |
182 | } | |
183 | ||
184 | struct worktree *find_worktree(struct worktree **list, | |
185 | const char *prefix, | |
186 | const char *arg) | |
187 | { | |
188 | struct worktree *wt; | |
189 | char *to_free = NULL; | |
190 | ||
191 | if ((wt = find_worktree_by_suffix(list, arg))) | |
192 | return wt; | |
193 | ||
194 | if (prefix) | |
195 | arg = to_free = prefix_filename(prefix, arg); | |
196 | wt = find_worktree_by_path(list, arg); | |
197 | free(to_free); | |
198 | return wt; | |
199 | } | |
200 | ||
201 | struct worktree *find_worktree_by_path(struct worktree **list, const char *p) | |
202 | { | |
203 | struct strbuf wt_path = STRBUF_INIT; | |
204 | char *path = real_pathdup(p, 0); | |
205 | ||
206 | if (!path) | |
207 | return NULL; | |
208 | for (; *list; list++) { | |
209 | if (!strbuf_realpath(&wt_path, (*list)->path, 0)) | |
210 | continue; | |
211 | ||
212 | if (!fspathcmp(path, wt_path.buf)) | |
213 | break; | |
214 | } | |
215 | free(path); | |
216 | strbuf_release(&wt_path); | |
217 | return *list; | |
218 | } | |
219 | ||
220 | int is_main_worktree(const struct worktree *wt) | |
221 | { | |
222 | return !wt->id; | |
223 | } | |
224 | ||
225 | const char *worktree_lock_reason(struct worktree *wt) | |
226 | { | |
227 | assert(!is_main_worktree(wt)); | |
228 | ||
229 | if (!wt->lock_reason_valid) { | |
230 | struct strbuf path = STRBUF_INIT; | |
231 | ||
232 | strbuf_addstr(&path, worktree_git_path(wt, "locked")); | |
233 | if (file_exists(path.buf)) { | |
234 | struct strbuf lock_reason = STRBUF_INIT; | |
235 | if (strbuf_read_file(&lock_reason, path.buf, 0) < 0) | |
236 | die_errno(_("failed to read '%s'"), path.buf); | |
237 | strbuf_trim(&lock_reason); | |
238 | wt->lock_reason = strbuf_detach(&lock_reason, NULL); | |
239 | } else | |
240 | wt->lock_reason = NULL; | |
241 | wt->lock_reason_valid = 1; | |
242 | strbuf_release(&path); | |
243 | } | |
244 | ||
245 | return wt->lock_reason; | |
246 | } | |
247 | ||
248 | /* convenient wrapper to deal with NULL strbuf */ | |
249 | static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...) | |
250 | { | |
251 | va_list params; | |
252 | ||
253 | if (!buf) | |
254 | return; | |
255 | ||
256 | va_start(params, fmt); | |
257 | strbuf_vaddf(buf, fmt, params); | |
258 | va_end(params); | |
259 | } | |
260 | ||
261 | int validate_worktree(const struct worktree *wt, struct strbuf *errmsg, | |
262 | unsigned flags) | |
263 | { | |
264 | struct strbuf wt_path = STRBUF_INIT; | |
265 | struct strbuf realpath = STRBUF_INIT; | |
266 | char *path = NULL; | |
267 | int err, ret = -1; | |
268 | ||
269 | strbuf_addf(&wt_path, "%s/.git", wt->path); | |
270 | ||
271 | if (is_main_worktree(wt)) { | |
272 | if (is_directory(wt_path.buf)) { | |
273 | ret = 0; | |
274 | goto done; | |
275 | } | |
276 | /* | |
277 | * Main worktree using .git file to point to the | |
278 | * repository would make it impossible to know where | |
279 | * the actual worktree is if this function is executed | |
280 | * from another worktree. No .git file support for now. | |
281 | */ | |
282 | strbuf_addf_gently(errmsg, | |
283 | _("'%s' at main working tree is not the repository directory"), | |
284 | wt_path.buf); | |
285 | goto done; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Make sure "gitdir" file points to a real .git file and that | |
290 | * file points back here. | |
291 | */ | |
292 | if (!is_absolute_path(wt->path)) { | |
293 | strbuf_addf_gently(errmsg, | |
294 | _("'%s' file does not contain absolute path to the working tree location"), | |
295 | git_common_path("worktrees/%s/gitdir", wt->id)); | |
296 | goto done; | |
297 | } | |
298 | ||
299 | if (flags & WT_VALIDATE_WORKTREE_MISSING_OK && | |
300 | !file_exists(wt->path)) { | |
301 | ret = 0; | |
302 | goto done; | |
303 | } | |
304 | ||
305 | if (!file_exists(wt_path.buf)) { | |
306 | strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf); | |
307 | goto done; | |
308 | } | |
309 | ||
310 | path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err)); | |
311 | if (!path) { | |
312 | strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"), | |
313 | wt_path.buf, err); | |
314 | goto done; | |
315 | } | |
316 | ||
317 | strbuf_realpath(&realpath, git_common_path("worktrees/%s", wt->id), 1); | |
318 | ret = fspathcmp(path, realpath.buf); | |
319 | ||
320 | if (ret) | |
321 | strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"), | |
322 | wt->path, git_common_path("worktrees/%s", wt->id)); | |
323 | done: | |
324 | free(path); | |
325 | strbuf_release(&wt_path); | |
326 | strbuf_release(&realpath); | |
327 | return ret; | |
328 | } | |
329 | ||
330 | void update_worktree_location(struct worktree *wt, const char *path_) | |
331 | { | |
332 | struct strbuf path = STRBUF_INIT; | |
333 | ||
334 | if (is_main_worktree(wt)) | |
335 | BUG("can't relocate main worktree"); | |
336 | ||
337 | strbuf_realpath(&path, path_, 1); | |
338 | if (fspathcmp(wt->path, path.buf)) { | |
339 | write_file(git_common_path("worktrees/%s/gitdir", wt->id), | |
340 | "%s/.git", path.buf); | |
341 | free(wt->path); | |
342 | wt->path = strbuf_detach(&path, NULL); | |
343 | } | |
344 | strbuf_release(&path); | |
345 | } | |
346 | ||
347 | int is_worktree_being_rebased(const struct worktree *wt, | |
348 | const char *target) | |
349 | { | |
350 | struct wt_status_state state; | |
351 | int found_rebase; | |
352 | ||
353 | memset(&state, 0, sizeof(state)); | |
354 | found_rebase = wt_status_check_rebase(wt, &state) && | |
355 | ((state.rebase_in_progress || | |
356 | state.rebase_interactive_in_progress) && | |
357 | state.branch && | |
358 | starts_with(target, "refs/heads/") && | |
359 | !strcmp(state.branch, target + strlen("refs/heads/"))); | |
360 | free(state.branch); | |
361 | free(state.onto); | |
362 | return found_rebase; | |
363 | } | |
364 | ||
365 | int is_worktree_being_bisected(const struct worktree *wt, | |
366 | const char *target) | |
367 | { | |
368 | struct wt_status_state state; | |
369 | int found_rebase; | |
370 | ||
371 | memset(&state, 0, sizeof(state)); | |
372 | found_rebase = wt_status_check_bisect(wt, &state) && | |
373 | state.branch && | |
374 | starts_with(target, "refs/heads/") && | |
375 | !strcmp(state.branch, target + strlen("refs/heads/")); | |
376 | free(state.branch); | |
377 | return found_rebase; | |
378 | } | |
379 | ||
380 | /* | |
381 | * note: this function should be able to detect shared symref even if | |
382 | * HEAD is temporarily detached (e.g. in the middle of rebase or | |
383 | * bisect). New commands that do similar things should update this | |
384 | * function as well. | |
385 | */ | |
386 | const struct worktree *find_shared_symref(const char *symref, | |
387 | const char *target) | |
388 | { | |
389 | const struct worktree *existing = NULL; | |
390 | static struct worktree **worktrees; | |
391 | int i = 0; | |
392 | ||
393 | if (worktrees) | |
394 | free_worktrees(worktrees); | |
395 | worktrees = get_worktrees(); | |
396 | ||
397 | for (i = 0; worktrees[i]; i++) { | |
398 | struct worktree *wt = worktrees[i]; | |
399 | const char *symref_target; | |
400 | struct ref_store *refs; | |
401 | int flags; | |
402 | ||
403 | if (wt->is_bare) | |
404 | continue; | |
405 | ||
406 | if (wt->is_detached && !strcmp(symref, "HEAD")) { | |
407 | if (is_worktree_being_rebased(wt, target)) { | |
408 | existing = wt; | |
409 | break; | |
410 | } | |
411 | if (is_worktree_being_bisected(wt, target)) { | |
412 | existing = wt; | |
413 | break; | |
414 | } | |
415 | } | |
416 | ||
417 | refs = get_worktree_ref_store(wt); | |
418 | symref_target = refs_resolve_ref_unsafe(refs, symref, 0, | |
419 | NULL, &flags); | |
420 | if ((flags & REF_ISSYMREF) && | |
421 | symref_target && !strcmp(symref_target, target)) { | |
422 | existing = wt; | |
423 | break; | |
424 | } | |
425 | } | |
426 | ||
427 | return existing; | |
428 | } | |
429 | ||
430 | int submodule_uses_worktrees(const char *path) | |
431 | { | |
432 | char *submodule_gitdir; | |
433 | struct strbuf sb = STRBUF_INIT, err = STRBUF_INIT; | |
434 | DIR *dir; | |
435 | struct dirent *d; | |
436 | int ret = 0; | |
437 | struct repository_format format = REPOSITORY_FORMAT_INIT; | |
438 | ||
439 | submodule_gitdir = git_pathdup_submodule(path, "%s", ""); | |
440 | if (!submodule_gitdir) | |
441 | return 0; | |
442 | ||
443 | /* The env would be set for the superproject. */ | |
444 | get_common_dir_noenv(&sb, submodule_gitdir); | |
445 | free(submodule_gitdir); | |
446 | ||
447 | strbuf_addstr(&sb, "/config"); | |
448 | read_repository_format(&format, sb.buf); | |
449 | if (verify_repository_format(&format, &err)) { | |
450 | strbuf_release(&err); | |
451 | strbuf_release(&sb); | |
452 | clear_repository_format(&format); | |
453 | return 1; | |
454 | } | |
455 | clear_repository_format(&format); | |
456 | strbuf_release(&err); | |
457 | ||
458 | /* Replace config by worktrees. */ | |
459 | strbuf_setlen(&sb, sb.len - strlen("config")); | |
460 | strbuf_addstr(&sb, "worktrees"); | |
461 | ||
462 | /* See if there is any file inside the worktrees directory. */ | |
463 | dir = opendir(sb.buf); | |
464 | strbuf_release(&sb); | |
465 | ||
466 | if (!dir) | |
467 | return 0; | |
468 | ||
469 | while ((d = readdir(dir)) != NULL) { | |
470 | if (is_dot_or_dotdot(d->d_name)) | |
471 | continue; | |
472 | ||
473 | ret = 1; | |
474 | break; | |
475 | } | |
476 | closedir(dir); | |
477 | return ret; | |
478 | } | |
479 | ||
480 | int parse_worktree_ref(const char *worktree_ref, const char **name, | |
481 | int *name_length, const char **ref) | |
482 | { | |
483 | if (skip_prefix(worktree_ref, "main-worktree/", &worktree_ref)) { | |
484 | if (!*worktree_ref) | |
485 | return -1; | |
486 | if (name) | |
487 | *name = NULL; | |
488 | if (name_length) | |
489 | *name_length = 0; | |
490 | if (ref) | |
491 | *ref = worktree_ref; | |
492 | return 0; | |
493 | } | |
494 | if (skip_prefix(worktree_ref, "worktrees/", &worktree_ref)) { | |
495 | const char *slash = strchr(worktree_ref, '/'); | |
496 | ||
497 | if (!slash || slash == worktree_ref || !slash[1]) | |
498 | return -1; | |
499 | if (name) | |
500 | *name = worktree_ref; | |
501 | if (name_length) | |
502 | *name_length = slash - worktree_ref; | |
503 | if (ref) | |
504 | *ref = slash + 1; | |
505 | return 0; | |
506 | } | |
507 | return -1; | |
508 | } | |
509 | ||
510 | void strbuf_worktree_ref(const struct worktree *wt, | |
511 | struct strbuf *sb, | |
512 | const char *refname) | |
513 | { | |
514 | switch (ref_type(refname)) { | |
515 | case REF_TYPE_PSEUDOREF: | |
516 | case REF_TYPE_PER_WORKTREE: | |
517 | if (wt && !wt->is_current) { | |
518 | if (is_main_worktree(wt)) | |
519 | strbuf_addstr(sb, "main-worktree/"); | |
520 | else | |
521 | strbuf_addf(sb, "worktrees/%s/", wt->id); | |
522 | } | |
523 | break; | |
524 | ||
525 | case REF_TYPE_MAIN_PSEUDOREF: | |
526 | case REF_TYPE_OTHER_PSEUDOREF: | |
527 | break; | |
528 | ||
529 | case REF_TYPE_NORMAL: | |
530 | /* | |
531 | * For shared refs, don't prefix worktrees/ or | |
532 | * main-worktree/. It's not necessary and | |
533 | * files-backend.c can't handle it anyway. | |
534 | */ | |
535 | break; | |
536 | } | |
537 | strbuf_addstr(sb, refname); | |
538 | } | |
539 | ||
540 | const char *worktree_ref(const struct worktree *wt, const char *refname) | |
541 | { | |
542 | static struct strbuf sb = STRBUF_INIT; | |
543 | ||
544 | strbuf_reset(&sb); | |
545 | strbuf_worktree_ref(wt, &sb, refname); | |
546 | return sb.buf; | |
547 | } | |
548 | ||
549 | int other_head_refs(each_ref_fn fn, void *cb_data) | |
550 | { | |
551 | struct worktree **worktrees, **p; | |
552 | int ret = 0; | |
553 | ||
554 | worktrees = get_worktrees(); | |
555 | for (p = worktrees; *p; p++) { | |
556 | struct worktree *wt = *p; | |
557 | struct object_id oid; | |
558 | int flag; | |
559 | ||
560 | if (wt->is_current) | |
561 | continue; | |
562 | ||
563 | if (!refs_read_ref_full(get_main_ref_store(the_repository), | |
564 | worktree_ref(wt, "HEAD"), | |
565 | RESOLVE_REF_READING, | |
566 | &oid, &flag)) | |
567 | ret = fn(worktree_ref(wt, "HEAD"), &oid, flag, cb_data); | |
568 | if (ret) | |
569 | break; | |
570 | } | |
571 | free_worktrees(worktrees); | |
572 | return ret; | |
573 | } |