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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 path = STRBUF_INIT; | |
51 | struct strbuf worktree_path = STRBUF_INIT; | |
52 | int is_bare = 0; | |
53 | ||
54 | strbuf_add_absolute_path(&worktree_path, get_git_common_dir()); | |
55 | is_bare = !strbuf_strip_suffix(&worktree_path, "/.git"); | |
56 | if (is_bare) | |
57 | strbuf_strip_suffix(&worktree_path, "/."); | |
58 | ||
59 | strbuf_addf(&path, "%s/HEAD", get_git_common_dir()); | |
60 | ||
61 | worktree = xcalloc(1, sizeof(*worktree)); | |
62 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
63 | worktree->is_bare = is_bare; | |
64 | add_head_info(worktree); | |
65 | ||
66 | strbuf_release(&path); | |
67 | strbuf_release(&worktree_path); | |
68 | return worktree; | |
69 | } | |
70 | ||
71 | static struct worktree *get_linked_worktree(const char *id) | |
72 | { | |
73 | struct worktree *worktree = NULL; | |
74 | struct strbuf path = STRBUF_INIT; | |
75 | struct strbuf worktree_path = STRBUF_INIT; | |
76 | ||
77 | if (!id) | |
78 | die("Missing linked worktree name"); | |
79 | ||
80 | strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id); | |
81 | if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0) | |
82 | /* invalid gitdir file */ | |
83 | goto done; | |
84 | ||
85 | strbuf_rtrim(&worktree_path); | |
86 | if (!strbuf_strip_suffix(&worktree_path, "/.git")) { | |
87 | strbuf_reset(&worktree_path); | |
88 | strbuf_add_absolute_path(&worktree_path, "."); | |
89 | strbuf_strip_suffix(&worktree_path, "/."); | |
90 | } | |
91 | ||
92 | strbuf_reset(&path); | |
93 | strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id); | |
94 | ||
95 | worktree = xcalloc(1, sizeof(*worktree)); | |
96 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
97 | worktree->id = xstrdup(id); | |
98 | add_head_info(worktree); | |
99 | ||
100 | done: | |
101 | strbuf_release(&path); | |
102 | strbuf_release(&worktree_path); | |
103 | return worktree; | |
104 | } | |
105 | ||
106 | static void mark_current_worktree(struct worktree **worktrees) | |
107 | { | |
108 | char *git_dir = absolute_pathdup(get_git_dir()); | |
109 | int i; | |
110 | ||
111 | for (i = 0; worktrees[i]; i++) { | |
112 | struct worktree *wt = worktrees[i]; | |
113 | const char *wt_git_dir = get_worktree_git_dir(wt); | |
114 | ||
115 | if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) { | |
116 | wt->is_current = 1; | |
117 | break; | |
118 | } | |
119 | } | |
120 | free(git_dir); | |
121 | } | |
122 | ||
123 | static int compare_worktree(const void *a_, const void *b_) | |
124 | { | |
125 | const struct worktree *const *a = a_; | |
126 | const struct worktree *const *b = b_; | |
127 | return fspathcmp((*a)->path, (*b)->path); | |
128 | } | |
129 | ||
130 | struct worktree **get_worktrees(unsigned flags) | |
131 | { | |
132 | struct worktree **list = NULL; | |
133 | struct strbuf path = STRBUF_INIT; | |
134 | DIR *dir; | |
135 | struct dirent *d; | |
136 | int counter = 0, alloc = 2; | |
137 | ||
138 | ALLOC_ARRAY(list, alloc); | |
139 | ||
140 | list[counter++] = get_main_worktree(); | |
141 | ||
142 | strbuf_addf(&path, "%s/worktrees", get_git_common_dir()); | |
143 | dir = opendir(path.buf); | |
144 | strbuf_release(&path); | |
145 | if (dir) { | |
146 | while ((d = readdir(dir)) != NULL) { | |
147 | struct worktree *linked = NULL; | |
148 | if (is_dot_or_dotdot(d->d_name)) | |
149 | continue; | |
150 | ||
151 | if ((linked = get_linked_worktree(d->d_name))) { | |
152 | ALLOC_GROW(list, counter + 1, alloc); | |
153 | list[counter++] = linked; | |
154 | } | |
155 | } | |
156 | closedir(dir); | |
157 | } | |
158 | ALLOC_GROW(list, counter + 1, alloc); | |
159 | list[counter] = NULL; | |
160 | ||
161 | if (flags & GWT_SORT_LINKED) | |
162 | /* | |
163 | * don't sort the first item (main worktree), which will | |
164 | * always be the first | |
165 | */ | |
166 | QSORT(list + 1, counter - 1, compare_worktree); | |
167 | ||
168 | mark_current_worktree(list); | |
169 | return list; | |
170 | } | |
171 | ||
172 | const char *get_worktree_git_dir(const struct worktree *wt) | |
173 | { | |
174 | if (!wt) | |
175 | return get_git_dir(); | |
176 | else if (!wt->id) | |
177 | return get_git_common_dir(); | |
178 | else | |
179 | return git_common_path("worktrees/%s", wt->id); | |
180 | } | |
181 | ||
182 | static struct worktree *find_worktree_by_suffix(struct worktree **list, | |
183 | const char *suffix) | |
184 | { | |
185 | struct worktree *found = NULL; | |
186 | int nr_found = 0, suffixlen; | |
187 | ||
188 | suffixlen = strlen(suffix); | |
189 | if (!suffixlen) | |
190 | return NULL; | |
191 | ||
192 | for (; *list && nr_found < 2; list++) { | |
193 | const char *path = (*list)->path; | |
194 | int pathlen = strlen(path); | |
195 | int start = pathlen - suffixlen; | |
196 | ||
197 | /* suffix must start at directory boundary */ | |
198 | if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) && | |
199 | !fspathcmp(suffix, path + start)) { | |
200 | found = *list; | |
201 | nr_found++; | |
202 | } | |
203 | } | |
204 | return nr_found == 1 ? found : NULL; | |
205 | } | |
206 | ||
207 | struct worktree *find_worktree(struct worktree **list, | |
208 | const char *prefix, | |
209 | const char *arg) | |
210 | { | |
211 | struct worktree *wt; | |
212 | char *path; | |
213 | char *to_free = NULL; | |
214 | ||
215 | if ((wt = find_worktree_by_suffix(list, arg))) | |
216 | return wt; | |
217 | ||
218 | if (prefix) | |
219 | arg = to_free = prefix_filename(prefix, arg); | |
220 | path = real_pathdup(arg, 0); | |
221 | if (!path) { | |
222 | free(to_free); | |
223 | return NULL; | |
224 | } | |
225 | for (; *list; list++) | |
226 | if (!fspathcmp(path, real_path((*list)->path))) | |
227 | break; | |
228 | free(path); | |
229 | free(to_free); | |
230 | return *list; | |
231 | } | |
232 | ||
233 | int is_main_worktree(const struct worktree *wt) | |
234 | { | |
235 | return !wt->id; | |
236 | } | |
237 | ||
238 | const char *worktree_lock_reason(struct worktree *wt) | |
239 | { | |
240 | assert(!is_main_worktree(wt)); | |
241 | ||
242 | if (!wt->lock_reason_valid) { | |
243 | struct strbuf path = STRBUF_INIT; | |
244 | ||
245 | strbuf_addstr(&path, worktree_git_path(wt, "locked")); | |
246 | if (file_exists(path.buf)) { | |
247 | struct strbuf lock_reason = STRBUF_INIT; | |
248 | if (strbuf_read_file(&lock_reason, path.buf, 0) < 0) | |
249 | die_errno(_("failed to read '%s'"), path.buf); | |
250 | strbuf_trim(&lock_reason); | |
251 | wt->lock_reason = strbuf_detach(&lock_reason, NULL); | |
252 | } else | |
253 | wt->lock_reason = NULL; | |
254 | wt->lock_reason_valid = 1; | |
255 | strbuf_release(&path); | |
256 | } | |
257 | ||
258 | return wt->lock_reason; | |
259 | } | |
260 | ||
261 | /* convenient wrapper to deal with NULL strbuf */ | |
262 | static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...) | |
263 | { | |
264 | va_list params; | |
265 | ||
266 | if (!buf) | |
267 | return; | |
268 | ||
269 | va_start(params, fmt); | |
270 | strbuf_vaddf(buf, fmt, params); | |
271 | va_end(params); | |
272 | } | |
273 | ||
274 | int validate_worktree(const struct worktree *wt, struct strbuf *errmsg, | |
275 | unsigned flags) | |
276 | { | |
277 | struct strbuf wt_path = STRBUF_INIT; | |
278 | char *path = NULL; | |
279 | int err, ret = -1; | |
280 | ||
281 | strbuf_addf(&wt_path, "%s/.git", wt->path); | |
282 | ||
283 | if (is_main_worktree(wt)) { | |
284 | if (is_directory(wt_path.buf)) { | |
285 | ret = 0; | |
286 | goto done; | |
287 | } | |
288 | /* | |
289 | * Main worktree using .git file to point to the | |
290 | * repository would make it impossible to know where | |
291 | * the actual worktree is if this function is executed | |
292 | * from another worktree. No .git file support for now. | |
293 | */ | |
294 | strbuf_addf_gently(errmsg, | |
295 | _("'%s' at main working tree is not the repository directory"), | |
296 | wt_path.buf); | |
297 | goto done; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Make sure "gitdir" file points to a real .git file and that | |
302 | * file points back here. | |
303 | */ | |
304 | if (!is_absolute_path(wt->path)) { | |
305 | strbuf_addf_gently(errmsg, | |
306 | _("'%s' file does not contain absolute path to the working tree location"), | |
307 | git_common_path("worktrees/%s/gitdir", wt->id)); | |
308 | goto done; | |
309 | } | |
310 | ||
311 | if (flags & WT_VALIDATE_WORKTREE_MISSING_OK && | |
312 | !file_exists(wt->path)) { | |
313 | ret = 0; | |
314 | goto done; | |
315 | } | |
316 | ||
317 | if (!file_exists(wt_path.buf)) { | |
318 | strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf); | |
319 | goto done; | |
320 | } | |
321 | ||
322 | path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err)); | |
323 | if (!path) { | |
324 | strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"), | |
325 | wt_path.buf, err); | |
326 | goto done; | |
327 | } | |
328 | ||
329 | ret = fspathcmp(path, real_path(git_common_path("worktrees/%s", wt->id))); | |
330 | ||
331 | if (ret) | |
332 | strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"), | |
333 | wt->path, git_common_path("worktrees/%s", wt->id)); | |
334 | done: | |
335 | free(path); | |
336 | strbuf_release(&wt_path); | |
337 | return ret; | |
338 | } | |
339 | ||
340 | void update_worktree_location(struct worktree *wt, const char *path_) | |
341 | { | |
342 | struct strbuf path = STRBUF_INIT; | |
343 | ||
344 | if (is_main_worktree(wt)) | |
345 | BUG("can't relocate main worktree"); | |
346 | ||
347 | strbuf_realpath(&path, path_, 1); | |
348 | if (fspathcmp(wt->path, path.buf)) { | |
349 | write_file(git_common_path("worktrees/%s/gitdir", wt->id), | |
350 | "%s/.git", path.buf); | |
351 | free(wt->path); | |
352 | wt->path = strbuf_detach(&path, NULL); | |
353 | } | |
354 | strbuf_release(&path); | |
355 | } | |
356 | ||
357 | int is_worktree_being_rebased(const struct worktree *wt, | |
358 | const char *target) | |
359 | { | |
360 | struct wt_status_state state; | |
361 | int found_rebase; | |
362 | ||
363 | memset(&state, 0, sizeof(state)); | |
364 | found_rebase = wt_status_check_rebase(wt, &state) && | |
365 | ((state.rebase_in_progress || | |
366 | state.rebase_interactive_in_progress) && | |
367 | state.branch && | |
368 | starts_with(target, "refs/heads/") && | |
369 | !strcmp(state.branch, target + strlen("refs/heads/"))); | |
370 | free(state.branch); | |
371 | free(state.onto); | |
372 | return found_rebase; | |
373 | } | |
374 | ||
375 | int is_worktree_being_bisected(const struct worktree *wt, | |
376 | const char *target) | |
377 | { | |
378 | struct wt_status_state state; | |
379 | int found_rebase; | |
380 | ||
381 | memset(&state, 0, sizeof(state)); | |
382 | found_rebase = wt_status_check_bisect(wt, &state) && | |
383 | state.branch && | |
384 | starts_with(target, "refs/heads/") && | |
385 | !strcmp(state.branch, target + strlen("refs/heads/")); | |
386 | free(state.branch); | |
387 | return found_rebase; | |
388 | } | |
389 | ||
390 | /* | |
391 | * note: this function should be able to detect shared symref even if | |
392 | * HEAD is temporarily detached (e.g. in the middle of rebase or | |
393 | * bisect). New commands that do similar things should update this | |
394 | * function as well. | |
395 | */ | |
396 | const struct worktree *find_shared_symref(const char *symref, | |
397 | const char *target) | |
398 | { | |
399 | const struct worktree *existing = NULL; | |
400 | static struct worktree **worktrees; | |
401 | int i = 0; | |
402 | ||
403 | if (worktrees) | |
404 | free_worktrees(worktrees); | |
405 | worktrees = get_worktrees(0); | |
406 | ||
407 | for (i = 0; worktrees[i]; i++) { | |
408 | struct worktree *wt = worktrees[i]; | |
409 | const char *symref_target; | |
410 | struct ref_store *refs; | |
411 | int flags; | |
412 | ||
413 | if (wt->is_bare) | |
414 | continue; | |
415 | ||
416 | if (wt->is_detached && !strcmp(symref, "HEAD")) { | |
417 | if (is_worktree_being_rebased(wt, target)) { | |
418 | existing = wt; | |
419 | break; | |
420 | } | |
421 | if (is_worktree_being_bisected(wt, target)) { | |
422 | existing = wt; | |
423 | break; | |
424 | } | |
425 | } | |
426 | ||
427 | refs = get_worktree_ref_store(wt); | |
428 | symref_target = refs_resolve_ref_unsafe(refs, symref, 0, | |
429 | NULL, &flags); | |
430 | if ((flags & REF_ISSYMREF) && | |
431 | symref_target && !strcmp(symref_target, target)) { | |
432 | existing = wt; | |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
437 | return existing; | |
438 | } | |
439 | ||
440 | int submodule_uses_worktrees(const char *path) | |
441 | { | |
442 | char *submodule_gitdir; | |
443 | struct strbuf sb = STRBUF_INIT; | |
444 | DIR *dir; | |
445 | struct dirent *d; | |
446 | int ret = 0; | |
447 | struct repository_format format; | |
448 | ||
449 | submodule_gitdir = git_pathdup_submodule(path, "%s", ""); | |
450 | if (!submodule_gitdir) | |
451 | return 0; | |
452 | ||
453 | /* The env would be set for the superproject. */ | |
454 | get_common_dir_noenv(&sb, submodule_gitdir); | |
455 | free(submodule_gitdir); | |
456 | ||
457 | /* | |
458 | * The check below is only known to be good for repository format | |
459 | * version 0 at the time of writing this code. | |
460 | */ | |
461 | strbuf_addstr(&sb, "/config"); | |
462 | read_repository_format(&format, sb.buf); | |
463 | if (format.version != 0) { | |
464 | strbuf_release(&sb); | |
465 | return 1; | |
466 | } | |
467 | ||
468 | /* Replace config by worktrees. */ | |
469 | strbuf_setlen(&sb, sb.len - strlen("config")); | |
470 | strbuf_addstr(&sb, "worktrees"); | |
471 | ||
472 | /* See if there is any file inside the worktrees directory. */ | |
473 | dir = opendir(sb.buf); | |
474 | strbuf_release(&sb); | |
475 | ||
476 | if (!dir) | |
477 | return 0; | |
478 | ||
479 | while ((d = readdir(dir)) != NULL) { | |
480 | if (is_dot_or_dotdot(d->d_name)) | |
481 | continue; | |
482 | ||
483 | ret = 1; | |
484 | break; | |
485 | } | |
486 | closedir(dir); | |
487 | return ret; | |
488 | } | |
489 | ||
490 | int parse_worktree_ref(const char *worktree_ref, const char **name, | |
491 | int *name_length, const char **ref) | |
492 | { | |
493 | if (skip_prefix(worktree_ref, "main-worktree/", &worktree_ref)) { | |
494 | if (!*worktree_ref) | |
495 | return -1; | |
496 | if (name) | |
497 | *name = NULL; | |
498 | if (name_length) | |
499 | *name_length = 0; | |
500 | if (ref) | |
501 | *ref = worktree_ref; | |
502 | return 0; | |
503 | } | |
504 | if (skip_prefix(worktree_ref, "worktrees/", &worktree_ref)) { | |
505 | const char *slash = strchr(worktree_ref, '/'); | |
506 | ||
507 | if (!slash || slash == worktree_ref || !slash[1]) | |
508 | return -1; | |
509 | if (name) | |
510 | *name = worktree_ref; | |
511 | if (name_length) | |
512 | *name_length = slash - worktree_ref; | |
513 | if (ref) | |
514 | *ref = slash + 1; | |
515 | return 0; | |
516 | } | |
517 | return -1; | |
518 | } | |
519 | ||
520 | void strbuf_worktree_ref(const struct worktree *wt, | |
521 | struct strbuf *sb, | |
522 | const char *refname) | |
523 | { | |
524 | switch (ref_type(refname)) { | |
525 | case REF_TYPE_PSEUDOREF: | |
526 | case REF_TYPE_PER_WORKTREE: | |
527 | if (wt && !wt->is_current) { | |
528 | if (is_main_worktree(wt)) | |
529 | strbuf_addstr(sb, "main-worktree/"); | |
530 | else | |
531 | strbuf_addf(sb, "worktrees/%s/", wt->id); | |
532 | } | |
533 | break; | |
534 | ||
535 | case REF_TYPE_MAIN_PSEUDOREF: | |
536 | case REF_TYPE_OTHER_PSEUDOREF: | |
537 | break; | |
538 | ||
539 | case REF_TYPE_NORMAL: | |
540 | /* | |
541 | * For shared refs, don't prefix worktrees/ or | |
542 | * main-worktree/. It's not necessary and | |
543 | * files-backend.c can't handle it anyway. | |
544 | */ | |
545 | break; | |
546 | } | |
547 | strbuf_addstr(sb, refname); | |
548 | } | |
549 | ||
550 | const char *worktree_ref(const struct worktree *wt, const char *refname) | |
551 | { | |
552 | static struct strbuf sb = STRBUF_INIT; | |
553 | ||
554 | strbuf_reset(&sb); | |
555 | strbuf_worktree_ref(wt, &sb, refname); | |
556 | return sb.buf; | |
557 | } | |
558 | ||
559 | int other_head_refs(each_ref_fn fn, void *cb_data) | |
560 | { | |
561 | struct worktree **worktrees, **p; | |
562 | int ret = 0; | |
563 | ||
564 | worktrees = get_worktrees(0); | |
565 | for (p = worktrees; *p; p++) { | |
566 | struct worktree *wt = *p; | |
567 | struct object_id oid; | |
568 | int flag; | |
569 | ||
570 | if (wt->is_current) | |
571 | continue; | |
572 | ||
573 | if (!refs_read_ref_full(get_main_ref_store(the_repository), | |
574 | worktree_ref(wt, "HEAD"), | |
575 | RESOLVE_REF_READING, | |
576 | &oid, &flag)) | |
577 | ret = fn(worktree_ref(wt, "HEAD"), &oid, flag, cb_data); | |
578 | if (ret) | |
579 | break; | |
580 | } | |
581 | free_worktrees(worktrees); | |
582 | return ret; | |
583 | } |