blob: f7869f8d6072c98c3e9be3387a9a3c19508e13ea [file] [log] [blame]
Michael Rappazzoac6c5612015-10-02 07:55:31 -04001#include "cache.h"
2#include "refs.h"
3#include "strbuf.h"
4#include "worktree.h"
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +07005#include "dir.h"
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 20:01:33 +07006#include "wt-status.h"
Michael Rappazzoac6c5612015-10-02 07:55:31 -04007
Michael Rappazzo51934902015-10-08 13:01:03 -04008void free_worktrees(struct worktree **worktrees)
9{
10 int i = 0;
11
12 for (i = 0; worktrees[i]; i++) {
13 free(worktrees[i]->path);
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +070014 free(worktrees[i]->id);
Michael Rappazzo92718b72015-10-08 13:01:04 -040015 free(worktrees[i]->head_ref);
Nguyễn Thái Ngọc Duy346ef532016-06-13 19:18:23 +070016 free(worktrees[i]->lock_reason);
Michael Rappazzo51934902015-10-08 13:01:03 -040017 free(worktrees[i]);
18 }
19 free (worktrees);
20}
21
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -040022/*
23 * read 'path_to_ref' into 'ref'. Also if is_detached is not NULL,
Li Peng832c0e52016-05-06 20:36:46 +080024 * set is_detached to 1 (0) if the ref is detached (is not detached).
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -040025 *
26 * $GIT_COMMON_DIR/$symref (e.g. HEAD) is practically outside $GIT_DIR so
27 * for linked worktrees, `resolve_ref_unsafe()` won't work (it uses
28 * git_path). Parse the ref ourselves.
29 *
30 * return -1 if the ref is not a proper ref, 0 otherwise (success)
31 */
32static int parse_ref(char *path_to_ref, struct strbuf *ref, int *is_detached)
33{
34 if (is_detached)
35 *is_detached = 0;
36 if (!strbuf_readlink(ref, path_to_ref, 0)) {
37 /* HEAD is symbolic link */
38 if (!starts_with(ref->buf, "refs/") ||
39 check_refname_format(ref->buf, 0))
40 return -1;
41 } else if (strbuf_read_file(ref, path_to_ref, 0) >= 0) {
42 /* textual symref or detached */
43 if (!starts_with(ref->buf, "ref:")) {
44 if (is_detached)
45 *is_detached = 1;
46 } else {
47 strbuf_remove(ref, 0, strlen("ref:"));
48 strbuf_trim(ref);
49 if (check_refname_format(ref->buf, 0))
50 return -1;
51 }
52 } else
53 return -1;
54 return 0;
55}
56
Michael Rappazzo51934902015-10-08 13:01:03 -040057/**
Michael Rappazzo92718b72015-10-08 13:01:04 -040058 * Add the head_sha1 and head_ref (if not detached) to the given worktree
59 */
60static void add_head_info(struct strbuf *head_ref, struct worktree *worktree)
61{
62 if (head_ref->len) {
63 if (worktree->is_detached) {
64 get_sha1_hex(head_ref->buf, worktree->head_sha1);
65 } else {
66 resolve_ref_unsafe(head_ref->buf, 0, worktree->head_sha1, NULL);
67 worktree->head_ref = strbuf_detach(head_ref, NULL);
68 }
69 }
70}
71
72/**
Michael Rappazzo51934902015-10-08 13:01:03 -040073 * get the main worktree
74 */
75static struct worktree *get_main_worktree(void)
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -040076{
Michael Rappazzo51934902015-10-08 13:01:03 -040077 struct worktree *worktree = NULL;
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -040078 struct strbuf path = STRBUF_INIT;
Michael Rappazzo51934902015-10-08 13:01:03 -040079 struct strbuf worktree_path = STRBUF_INIT;
Michael Rappazzo51934902015-10-08 13:01:03 -040080 struct strbuf head_ref = STRBUF_INIT;
Michael Rappazzo92718b72015-10-08 13:01:04 -040081 int is_bare = 0;
82 int is_detached = 0;
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -040083
René Scharfefd2e7da2016-07-09 17:43:59 +020084 strbuf_add_absolute_path(&worktree_path, get_git_common_dir());
Michael Rappazzo92718b72015-10-08 13:01:04 -040085 is_bare = !strbuf_strip_suffix(&worktree_path, "/.git");
86 if (is_bare)
Michael Rappazzo51934902015-10-08 13:01:03 -040087 strbuf_strip_suffix(&worktree_path, "/.");
88
89 strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
90
Michael Rappazzo92718b72015-10-08 13:01:04 -040091 if (parse_ref(path.buf, &head_ref, &is_detached) < 0)
92 goto done;
93
94 worktree = xmalloc(sizeof(struct worktree));
95 worktree->path = strbuf_detach(&worktree_path, NULL);
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +070096 worktree->id = NULL;
Michael Rappazzo92718b72015-10-08 13:01:04 -040097 worktree->is_bare = is_bare;
98 worktree->head_ref = NULL;
99 worktree->is_detached = is_detached;
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700100 worktree->is_current = 0;
Michael Rappazzo92718b72015-10-08 13:01:04 -0400101 add_head_info(&head_ref, worktree);
Nguyễn Thái Ngọc Duy346ef532016-06-13 19:18:23 +0700102 worktree->lock_reason = NULL;
103 worktree->lock_reason_valid = 0;
Michael Rappazzo92718b72015-10-08 13:01:04 -0400104
105done:
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -0400106 strbuf_release(&path);
Michael Rappazzo51934902015-10-08 13:01:03 -0400107 strbuf_release(&worktree_path);
108 strbuf_release(&head_ref);
109 return worktree;
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -0400110}
111
Michael Rappazzo51934902015-10-08 13:01:03 -0400112static struct worktree *get_linked_worktree(const char *id)
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400113{
Michael Rappazzo51934902015-10-08 13:01:03 -0400114 struct worktree *worktree = NULL;
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400115 struct strbuf path = STRBUF_INIT;
Michael Rappazzo51934902015-10-08 13:01:03 -0400116 struct strbuf worktree_path = STRBUF_INIT;
Michael Rappazzo51934902015-10-08 13:01:03 -0400117 struct strbuf head_ref = STRBUF_INIT;
Michael Rappazzo92718b72015-10-08 13:01:04 -0400118 int is_detached = 0;
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400119
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -0400120 if (!id)
121 die("Missing linked worktree name");
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400122
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +0700123 strbuf_git_common_path(&path, "worktrees/%s/gitdir", id);
Michael Rappazzo51934902015-10-08 13:01:03 -0400124 if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0)
125 /* invalid gitdir file */
126 goto done;
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -0400127
Michael Rappazzo51934902015-10-08 13:01:03 -0400128 strbuf_rtrim(&worktree_path);
129 if (!strbuf_strip_suffix(&worktree_path, "/.git")) {
130 strbuf_reset(&worktree_path);
René Scharfefd2e7da2016-07-09 17:43:59 +0200131 strbuf_add_absolute_path(&worktree_path, ".");
Michael Rappazzo51934902015-10-08 13:01:03 -0400132 strbuf_strip_suffix(&worktree_path, "/.");
133 }
134
Michael Rappazzo1ceb7f92015-10-08 13:01:02 -0400135 strbuf_reset(&path);
Michael Rappazzo51934902015-10-08 13:01:03 -0400136 strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400137
Michael Rappazzo92718b72015-10-08 13:01:04 -0400138 if (parse_ref(path.buf, &head_ref, &is_detached) < 0)
139 goto done;
140
141 worktree = xmalloc(sizeof(struct worktree));
142 worktree->path = strbuf_detach(&worktree_path, NULL);
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +0700143 worktree->id = xstrdup(id);
Michael Rappazzo92718b72015-10-08 13:01:04 -0400144 worktree->is_bare = 0;
145 worktree->head_ref = NULL;
146 worktree->is_detached = is_detached;
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700147 worktree->is_current = 0;
Michael Rappazzo92718b72015-10-08 13:01:04 -0400148 add_head_info(&head_ref, worktree);
Nguyễn Thái Ngọc Duy346ef532016-06-13 19:18:23 +0700149 worktree->lock_reason = NULL;
150 worktree->lock_reason_valid = 0;
Michael Rappazzo51934902015-10-08 13:01:03 -0400151
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400152done:
153 strbuf_release(&path);
Michael Rappazzo51934902015-10-08 13:01:03 -0400154 strbuf_release(&worktree_path);
155 strbuf_release(&head_ref);
156 return worktree;
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400157}
158
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700159static void mark_current_worktree(struct worktree **worktrees)
160{
Nguyễn Thái Ngọc Duy360af2d2016-05-22 16:33:52 +0700161 char *git_dir = xstrdup(absolute_path(get_git_dir()));
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700162 int i;
163
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700164 for (i = 0; worktrees[i]; i++) {
165 struct worktree *wt = worktrees[i];
Nguyễn Thái Ngọc Duy360af2d2016-05-22 16:33:52 +0700166 const char *wt_git_dir = get_worktree_git_dir(wt);
167
168 if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) {
169 wt->is_current = 1;
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700170 break;
Nguyễn Thái Ngọc Duy360af2d2016-05-22 16:33:52 +0700171 }
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700172 }
Nguyễn Thái Ngọc Duy360af2d2016-05-22 16:33:52 +0700173 free(git_dir);
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700174}
175
Michael Rappazzo51934902015-10-08 13:01:03 -0400176struct worktree **get_worktrees(void)
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400177{
Michael Rappazzo51934902015-10-08 13:01:03 -0400178 struct worktree **list = NULL;
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400179 struct strbuf path = STRBUF_INIT;
180 DIR *dir;
181 struct dirent *d;
Michael Rappazzo51934902015-10-08 13:01:03 -0400182 int counter = 0, alloc = 2;
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400183
Michael Rappazzo51934902015-10-08 13:01:03 -0400184 list = xmalloc(alloc * sizeof(struct worktree *));
185
186 if ((list[counter] = get_main_worktree()))
187 counter++;
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400188
189 strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
190 dir = opendir(path.buf);
191 strbuf_release(&path);
Michael Rappazzo51934902015-10-08 13:01:03 -0400192 if (dir) {
193 while ((d = readdir(dir)) != NULL) {
194 struct worktree *linked = NULL;
Nguyễn Thái Ngọc Duyafb9e302016-05-22 16:33:54 +0700195 if (is_dot_or_dotdot(d->d_name))
Michael Rappazzo51934902015-10-08 13:01:03 -0400196 continue;
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400197
Nguyễn Thái Ngọc Duyd4cddd62016-01-18 18:21:29 +0700198 if ((linked = get_linked_worktree(d->d_name))) {
199 ALLOC_GROW(list, counter + 1, alloc);
200 list[counter++] = linked;
201 }
Michael Rappazzo51934902015-10-08 13:01:03 -0400202 }
203 closedir(dir);
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400204 }
Michael Rappazzo51934902015-10-08 13:01:03 -0400205 ALLOC_GROW(list, counter + 1, alloc);
206 list[counter] = NULL;
Nguyễn Thái Ngọc Duy750e8a62016-04-22 20:01:28 +0700207
208 mark_current_worktree(list);
Michael Rappazzo51934902015-10-08 13:01:03 -0400209 return list;
210}
211
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +0700212const char *get_worktree_git_dir(const struct worktree *wt)
Michael Rappazzo51934902015-10-08 13:01:03 -0400213{
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +0700214 if (!wt)
215 return get_git_dir();
216 else if (!wt->id)
217 return get_git_common_dir();
218 else
219 return git_common_path("worktrees/%s", wt->id);
220}
221
Nguyễn Thái Ngọc Duy080739b2016-06-13 19:18:26 +0700222static struct worktree *find_worktree_by_suffix(struct worktree **list,
223 const char *suffix)
224{
225 struct worktree *found = NULL;
226 int nr_found = 0, suffixlen;
227
228 suffixlen = strlen(suffix);
229 if (!suffixlen)
230 return NULL;
231
232 for (; *list && nr_found < 2; list++) {
233 const char *path = (*list)->path;
234 int pathlen = strlen(path);
235 int start = pathlen - suffixlen;
236
237 /* suffix must start at directory boundary */
238 if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) &&
239 !fspathcmp(suffix, path + start)) {
240 found = *list;
241 nr_found++;
242 }
243 }
244 return nr_found == 1 ? found : NULL;
245}
246
Nguyễn Thái Ngọc Duy68353142016-06-03 19:19:39 +0700247struct worktree *find_worktree(struct worktree **list,
248 const char *prefix,
249 const char *arg)
250{
Nguyễn Thái Ngọc Duy080739b2016-06-13 19:18:26 +0700251 struct worktree *wt;
Nguyễn Thái Ngọc Duy68353142016-06-03 19:19:39 +0700252 char *path;
253
Nguyễn Thái Ngọc Duy080739b2016-06-13 19:18:26 +0700254 if ((wt = find_worktree_by_suffix(list, arg)))
255 return wt;
256
Nguyễn Thái Ngọc Duy68353142016-06-03 19:19:39 +0700257 arg = prefix_filename(prefix, strlen(prefix), arg);
258 path = xstrdup(real_path(arg));
259 for (; *list; list++)
260 if (!fspathcmp(path, real_path((*list)->path)))
261 break;
262 free(path);
263 return *list;
264}
265
Nguyễn Thái Ngọc Duy984ad9e2016-06-03 19:19:40 +0700266int is_main_worktree(const struct worktree *wt)
267{
268 return !wt->id;
269}
270
Nguyễn Thái Ngọc Duy346ef532016-06-13 19:18:23 +0700271const char *is_worktree_locked(struct worktree *wt)
272{
273 assert(!is_main_worktree(wt));
274
275 if (!wt->lock_reason_valid) {
276 struct strbuf path = STRBUF_INIT;
277
278 strbuf_addstr(&path, worktree_git_path(wt, "locked"));
279 if (file_exists(path.buf)) {
280 struct strbuf lock_reason = STRBUF_INIT;
281 if (strbuf_read_file(&lock_reason, path.buf, 0) < 0)
282 die_errno(_("failed to read '%s'"), path.buf);
283 strbuf_trim(&lock_reason);
284 wt->lock_reason = strbuf_detach(&lock_reason, NULL);
285 } else
286 wt->lock_reason = NULL;
287 wt->lock_reason_valid = 1;
288 strbuf_release(&path);
289 }
290
291 return wt->lock_reason;
292}
293
Nguyễn Thái Ngọc Duy14ace5b2016-04-22 20:01:36 +0700294int is_worktree_being_rebased(const struct worktree *wt,
295 const char *target)
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 20:01:33 +0700296{
297 struct wt_status_state state;
298 int found_rebase;
299
300 memset(&state, 0, sizeof(state));
301 found_rebase = wt_status_check_rebase(wt, &state) &&
302 ((state.rebase_in_progress ||
303 state.rebase_interactive_in_progress) &&
304 state.branch &&
305 starts_with(target, "refs/heads/") &&
306 !strcmp(state.branch, target + strlen("refs/heads/")));
307 free(state.branch);
308 free(state.onto);
309 return found_rebase;
310}
311
Nguyễn Thái Ngọc Duy14ace5b2016-04-22 20:01:36 +0700312int is_worktree_being_bisected(const struct worktree *wt,
313 const char *target)
Nguyễn Thái Ngọc Duy04a3dfb2016-04-22 20:01:35 +0700314{
315 struct wt_status_state state;
316 int found_rebase;
317
318 memset(&state, 0, sizeof(state));
319 found_rebase = wt_status_check_bisect(wt, &state) &&
320 state.branch &&
321 starts_with(target, "refs/heads/") &&
322 !strcmp(state.branch, target + strlen("refs/heads/"));
323 free(state.branch);
324 return found_rebase;
325}
326
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 20:01:33 +0700327/*
328 * note: this function should be able to detect shared symref even if
329 * HEAD is temporarily detached (e.g. in the middle of rebase or
330 * bisect). New commands that do similar things should update this
331 * function as well.
332 */
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 20:01:27 +0700333const struct worktree *find_shared_symref(const char *symref,
334 const char *target)
Michael Rappazzo51934902015-10-08 13:01:03 -0400335{
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 20:01:27 +0700336 const struct worktree *existing = NULL;
Michael Rappazzo51934902015-10-08 13:01:03 -0400337 struct strbuf path = STRBUF_INIT;
338 struct strbuf sb = STRBUF_INIT;
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 20:01:27 +0700339 static struct worktree **worktrees;
Michael Rappazzo51934902015-10-08 13:01:03 -0400340 int i = 0;
341
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 20:01:27 +0700342 if (worktrees)
343 free_worktrees(worktrees);
344 worktrees = get_worktrees();
345
Michael Rappazzo51934902015-10-08 13:01:03 -0400346 for (i = 0; worktrees[i]; i++) {
Nguyễn Thái Ngọc Duyc8717142016-04-22 20:01:32 +0700347 struct worktree *wt = worktrees[i];
Dennis Kaarsemaker171c6462016-10-12 18:41:07 +0200348 if (wt->is_bare)
349 continue;
Nguyễn Thái Ngọc Duyc8717142016-04-22 20:01:32 +0700350
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 20:01:33 +0700351 if (wt->is_detached && !strcmp(symref, "HEAD")) {
352 if (is_worktree_being_rebased(wt, target)) {
353 existing = wt;
354 break;
355 }
Nguyễn Thái Ngọc Duy04a3dfb2016-04-22 20:01:35 +0700356 if (is_worktree_being_bisected(wt, target)) {
357 existing = wt;
358 break;
359 }
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 20:01:33 +0700360 }
361
Michael Rappazzo51934902015-10-08 13:01:03 -0400362 strbuf_reset(&path);
363 strbuf_reset(&sb);
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +0700364 strbuf_addf(&path, "%s/%s",
Nguyễn Thái Ngọc Duyc8717142016-04-22 20:01:32 +0700365 get_worktree_git_dir(wt),
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 20:01:26 +0700366 symref);
Michael Rappazzo51934902015-10-08 13:01:03 -0400367
368 if (parse_ref(path.buf, &sb, NULL)) {
369 continue;
370 }
371
372 if (!strcmp(sb.buf, target)) {
Nguyễn Thái Ngọc Duyc8717142016-04-22 20:01:32 +0700373 existing = wt;
Michael Rappazzo51934902015-10-08 13:01:03 -0400374 break;
375 }
376 }
377
378 strbuf_release(&path);
379 strbuf_release(&sb);
Michael Rappazzoac6c5612015-10-02 07:55:31 -0400380
381 return existing;
382}