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chromium / external / github.com / git / git / refs/tags/v2.14.2 / . / worktree.c
blob: e28ffbeb096a85d67b2e885c48ab096340b5d295 [file] [log] [blame]
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]1#include "cache.h"
Brandon Williamsb3371722017-06-22 18:43:37[diff] [blame]2#include "repository.h"
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]3#include "refs.h"
4#include "strbuf.h"
5#include "worktree.h"
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]6#include "dir.h"
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 13:01:33[diff] [blame]7#include "wt-status.h"
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]8
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]9void free_worktrees(struct worktree **worktrees)
10{
11 int i = 0;
12
13 for (i = 0; worktrees[i]; i++) {
14 free(worktrees[i]->path);
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 13:01:26[diff] [blame]15 free(worktrees[i]->id);
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]16 free(worktrees[i]->head_ref);
Nguyễn Thái Ngọc Duy346ef532016-06-13 12:18:23[diff] [blame]17 free(worktrees[i]->lock_reason);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]18 free(worktrees[i]);
19 }
20 free (worktrees);
21}
22
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]23/**
Nguyễn Thái Ngọc Duyfa099d22017-04-24 10:01:23[diff] [blame]24 * Update head_sha1, head_ref and is_detached of the given worktree
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]25 */
Nguyễn Thái Ngọc Duyfa099d22017-04-24 10:01:23[diff] [blame]26static void add_head_info(struct worktree *wt)
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]27{
Nguyễn Thái Ngọc Duyfa099d22017-04-24 10:01:23[diff] [blame]28 int flags;
29 const char *target;
30
31 target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt),
32 "HEAD",
33 RESOLVE_REF_READING,
34 wt->head_sha1, &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;
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]42}
43
44/**
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]45 * get the main worktree
46 */
47static struct worktree *get_main_worktree(void)
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]48{
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]49 struct worktree *worktree = NULL;
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]50 struct strbuf path = STRBUF_INIT;
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]51 struct strbuf worktree_path = STRBUF_INIT;
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]52 int is_bare = 0;
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]53
René Scharfefd2e7da2016-07-09 15:43:59[diff] [blame]54 strbuf_add_absolute_path(&worktree_path, get_git_common_dir());
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]55 is_bare = !strbuf_strip_suffix(&worktree_path, "/.git");
56 if (is_bare)
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]57 strbuf_strip_suffix(&worktree_path, "/.");
58
59 strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
60
Nguyễn Thái Ngọc Duyf054996d2016-11-22 10:00:44[diff] [blame]61 worktree = xcalloc(1, sizeof(*worktree));
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]62 worktree->path = strbuf_detach(&worktree_path, NULL);
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]63 worktree->is_bare = is_bare;
Nguyễn Thái Ngọc Duyfa099d22017-04-24 10:01:23[diff] [blame]64 add_head_info(worktree);
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]65
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]66 strbuf_release(&path);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]67 strbuf_release(&worktree_path);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]68 return worktree;
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]69}
70
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]71static struct worktree *get_linked_worktree(const char *id)
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]72{
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]73 struct worktree *worktree = NULL;
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]74 struct strbuf path = STRBUF_INIT;
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]75 struct strbuf worktree_path = STRBUF_INIT;
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]76
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]77 if (!id)
78 die("Missing linked worktree name");
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]79
Brandon Williamsb3371722017-06-22 18:43:37[diff] [blame]80 strbuf_git_common_path(&path, the_repository, "worktrees/%s/gitdir", id);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]81 if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0)
82 /* invalid gitdir file */
83 goto done;
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]84
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]85 strbuf_rtrim(&worktree_path);
86 if (!strbuf_strip_suffix(&worktree_path, "/.git")) {
87 strbuf_reset(&worktree_path);
René Scharfefd2e7da2016-07-09 15:43:59[diff] [blame]88 strbuf_add_absolute_path(&worktree_path, ".");
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]89 strbuf_strip_suffix(&worktree_path, "/.");
90 }
91
Michael Rappazzo1ceb7f92015-10-08 17:01:02[diff] [blame]92 strbuf_reset(&path);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]93 strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]94
Nguyễn Thái Ngọc Duyf054996d2016-11-22 10:00:44[diff] [blame]95 worktree = xcalloc(1, sizeof(*worktree));
Michael Rappazzo92718b72015-10-08 17:01:04[diff] [blame]96 worktree->path = strbuf_detach(&worktree_path, NULL);
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 13:01:26[diff] [blame]97 worktree->id = xstrdup(id);
Nguyễn Thái Ngọc Duyfa099d22017-04-24 10:01:23[diff] [blame]98 add_head_info(worktree);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]99
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]100done:
101 strbuf_release(&path);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]102 strbuf_release(&worktree_path);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]103 return worktree;
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]104}
105
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]106static void mark_current_worktree(struct worktree **worktrees)
107{
René Scharfe0aaad412017-01-26 17:54:23[diff] [blame]108 char *git_dir = absolute_pathdup(get_git_dir());
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]109 int i;
110
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]111 for (i = 0; worktrees[i]; i++) {
112 struct worktree *wt = worktrees[i];
Nguyễn Thái Ngọc Duy360af2d2016-05-22 09:33:52[diff] [blame]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;
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]117 break;
Nguyễn Thái Ngọc Duy360af2d2016-05-22 09:33:52[diff] [blame]118 }
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]119 }
Nguyễn Thái Ngọc Duy360af2d2016-05-22 09:33:52[diff] [blame]120 free(git_dir);
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]121}
122
Nguyễn Thái Ngọc Duy4df1d4d2016-11-28 09:36:56[diff] [blame]123static 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
Nguyễn Thái Ngọc Duy4fff1ef2016-11-28 09:36:55[diff] [blame]130struct worktree **get_worktrees(unsigned flags)
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]131{
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]132 struct worktree **list = NULL;
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]133 struct strbuf path = STRBUF_INIT;
134 DIR *dir;
135 struct dirent *d;
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]136 int counter = 0, alloc = 2;
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]137
René Scharfe3f646992017-02-25 10:30:03[diff] [blame]138 ALLOC_ARRAY(list, alloc);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]139
Nguyễn Thái Ngọc Duya2345632016-11-28 09:36:54[diff] [blame]140 list[counter++] = get_main_worktree();
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]141
142 strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
143 dir = opendir(path.buf);
144 strbuf_release(&path);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]145 if (dir) {
146 while ((d = readdir(dir)) != NULL) {
147 struct worktree *linked = NULL;
Nguyễn Thái Ngọc Duyafb9e302016-05-22 09:33:54[diff] [blame]148 if (is_dot_or_dotdot(d->d_name))
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]149 continue;
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]150
Nguyễn Thái Ngọc Duyd4cddd62016-01-18 11:21:29[diff] [blame]151 if ((linked = get_linked_worktree(d->d_name))) {
152 ALLOC_GROW(list, counter + 1, alloc);
153 list[counter++] = linked;
154 }
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]155 }
156 closedir(dir);
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]157 }
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]158 ALLOC_GROW(list, counter + 1, alloc);
159 list[counter] = NULL;
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]160
Nguyễn Thái Ngọc Duy4df1d4d2016-11-28 09:36:56[diff] [blame]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
Nguyễn Thái Ngọc Duy750e8a62016-04-22 13:01:28[diff] [blame]168 mark_current_worktree(list);
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]169 return list;
170}
171
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 13:01:26[diff] [blame]172const char *get_worktree_git_dir(const struct worktree *wt)
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]173{
Nguyễn Thái Ngọc Duy69dfe3b2016-04-22 13:01:26[diff] [blame]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
Nguyễn Thái Ngọc Duy080739b2016-06-13 12:18:26[diff] [blame]182static 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
Nguyễn Thái Ngọc Duy68353142016-06-03 12:19:39[diff] [blame]207struct worktree *find_worktree(struct worktree **list,
208 const char *prefix,
209 const char *arg)
210{
Nguyễn Thái Ngọc Duy080739b2016-06-13 12:18:26[diff] [blame]211 struct worktree *wt;
Nguyễn Thái Ngọc Duy68353142016-06-03 12:19:39[diff] [blame]212 char *path;
Jeff Kinge4da43b2017-03-21 01:28:49[diff] [blame]213 char *to_free = NULL;
Nguyễn Thái Ngọc Duy68353142016-06-03 12:19:39[diff] [blame]214
Nguyễn Thái Ngọc Duy080739b2016-06-13 12:18:26[diff] [blame]215 if ((wt = find_worktree_by_suffix(list, arg)))
216 return wt;
217
Jeff Kinge4da43b2017-03-21 01:28:49[diff] [blame]218 if (prefix)
219 arg = to_free = prefix_filename(prefix, arg);
Johannes Schindelince83ead2017-03-08 15:43:40[diff] [blame]220 path = real_pathdup(arg, 1);
Nguyễn Thái Ngọc Duy68353142016-06-03 12:19:39[diff] [blame]221 for (; *list; list++)
222 if (!fspathcmp(path, real_path((*list)->path)))
223 break;
224 free(path);
Jeff Kinge4da43b2017-03-21 01:28:49[diff] [blame]225 free(to_free);
Nguyễn Thái Ngọc Duy68353142016-06-03 12:19:39[diff] [blame]226 return *list;
227}
228
Nguyễn Thái Ngọc Duy984ad9e2016-06-03 12:19:40[diff] [blame]229int is_main_worktree(const struct worktree *wt)
230{
231 return !wt->id;
232}
233
Nguyễn Thái Ngọc Duy346ef532016-06-13 12:18:23[diff] [blame]234const char *is_worktree_locked(struct worktree *wt)
235{
236 assert(!is_main_worktree(wt));
237
238 if (!wt->lock_reason_valid) {
239 struct strbuf path = STRBUF_INIT;
240
241 strbuf_addstr(&path, worktree_git_path(wt, "locked"));
242 if (file_exists(path.buf)) {
243 struct strbuf lock_reason = STRBUF_INIT;
244 if (strbuf_read_file(&lock_reason, path.buf, 0) < 0)
245 die_errno(_("failed to read '%s'"), path.buf);
246 strbuf_trim(&lock_reason);
247 wt->lock_reason = strbuf_detach(&lock_reason, NULL);
248 } else
249 wt->lock_reason = NULL;
250 wt->lock_reason_valid = 1;
251 strbuf_release(&path);
252 }
253
254 return wt->lock_reason;
255}
256
Nguyễn Thái Ngọc Duy14ace5b2016-04-22 13:01:36[diff] [blame]257int is_worktree_being_rebased(const struct worktree *wt,
258 const char *target)
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 13:01:33[diff] [blame]259{
260 struct wt_status_state state;
261 int found_rebase;
262
263 memset(&state, 0, sizeof(state));
264 found_rebase = wt_status_check_rebase(wt, &state) &&
265 ((state.rebase_in_progress ||
266 state.rebase_interactive_in_progress) &&
267 state.branch &&
268 starts_with(target, "refs/heads/") &&
269 !strcmp(state.branch, target + strlen("refs/heads/")));
270 free(state.branch);
271 free(state.onto);
272 return found_rebase;
273}
274
Nguyễn Thái Ngọc Duy14ace5b2016-04-22 13:01:36[diff] [blame]275int is_worktree_being_bisected(const struct worktree *wt,
276 const char *target)
Nguyễn Thái Ngọc Duy04a3dfb2016-04-22 13:01:35[diff] [blame]277{
278 struct wt_status_state state;
279 int found_rebase;
280
281 memset(&state, 0, sizeof(state));
282 found_rebase = wt_status_check_bisect(wt, &state) &&
283 state.branch &&
284 starts_with(target, "refs/heads/") &&
285 !strcmp(state.branch, target + strlen("refs/heads/"));
286 free(state.branch);
287 return found_rebase;
288}
289
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 13:01:33[diff] [blame]290/*
291 * note: this function should be able to detect shared symref even if
292 * HEAD is temporarily detached (e.g. in the middle of rebase or
293 * bisect). New commands that do similar things should update this
294 * function as well.
295 */
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 13:01:27[diff] [blame]296const struct worktree *find_shared_symref(const char *symref,
297 const char *target)
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]298{
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 13:01:27[diff] [blame]299 const struct worktree *existing = NULL;
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 13:01:27[diff] [blame]300 static struct worktree **worktrees;
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]301 int i = 0;
302
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 13:01:27[diff] [blame]303 if (worktrees)
304 free_worktrees(worktrees);
Nguyễn Thái Ngọc Duy4fff1ef2016-11-28 09:36:55[diff] [blame]305 worktrees = get_worktrees(0);
Nguyễn Thái Ngọc Duyd3b9ac02016-04-22 13:01:27[diff] [blame]306
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]307 for (i = 0; worktrees[i]; i++) {
Nguyễn Thái Ngọc Duyc8717142016-04-22 13:01:32[diff] [blame]308 struct worktree *wt = worktrees[i];
Nguyễn Thái Ngọc Duyfa099d22017-04-24 10:01:23[diff] [blame]309 const char *symref_target;
310 unsigned char sha1[20];
311 struct ref_store *refs;
312 int flags;
313
Dennis Kaarsemaker171c6462016-10-12 16:41:07[diff] [blame]314 if (wt->is_bare)
315 continue;
Nguyễn Thái Ngọc Duyc8717142016-04-22 13:01:32[diff] [blame]316
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 13:01:33[diff] [blame]317 if (wt->is_detached && !strcmp(symref, "HEAD")) {
318 if (is_worktree_being_rebased(wt, target)) {
319 existing = wt;
320 break;
321 }
Nguyễn Thái Ngọc Duy04a3dfb2016-04-22 13:01:35[diff] [blame]322 if (is_worktree_being_bisected(wt, target)) {
323 existing = wt;
324 break;
325 }
Nguyễn Thái Ngọc Duy8d9fdd72016-04-22 13:01:33[diff] [blame]326 }
327
Nguyễn Thái Ngọc Duyfa099d22017-04-24 10:01:23[diff] [blame]328 refs = get_worktree_ref_store(wt);
329 symref_target = refs_resolve_ref_unsafe(refs, symref, 0,
330 sha1, &flags);
331 if ((flags & REF_ISSYMREF) && !strcmp(symref_target, target)) {
Nguyễn Thái Ngọc Duyc8717142016-04-22 13:01:32[diff] [blame]332 existing = wt;
Michael Rappazzo51934902015-10-08 17:01:03[diff] [blame]333 break;
334 }
335 }
336
Michael Rappazzoac6c5612015-10-02 11:55:31[diff] [blame]337 return existing;
338}
Stefan Beller1a248cf2016-12-12 19:04:33[diff] [blame]339
340int submodule_uses_worktrees(const char *path)
341{
342 char *submodule_gitdir;
343 struct strbuf sb = STRBUF_INIT;
344 DIR *dir;
345 struct dirent *d;
Stefan Beller7c4be452016-12-27 17:50:13[diff] [blame]346 int ret = 0;
Stefan Beller1a248cf2016-12-12 19:04:33[diff] [blame]347 struct repository_format format;
348
349 submodule_gitdir = git_pathdup_submodule(path, "%s", "");
350 if (!submodule_gitdir)
351 return 0;
352
353 /* The env would be set for the superproject. */
354 get_common_dir_noenv(&sb, submodule_gitdir);
Johannes Schindelind32de662017-05-04 13:59:19[diff] [blame]355 free(submodule_gitdir);
Stefan Beller1a248cf2016-12-12 19:04:33[diff] [blame]356
357 /*
358 * The check below is only known to be good for repository format
359 * version 0 at the time of writing this code.
360 */
361 strbuf_addstr(&sb, "/config");
362 read_repository_format(&format, sb.buf);
363 if (format.version != 0) {
364 strbuf_release(&sb);
365 return 1;
366 }
367
368 /* Replace config by worktrees. */
369 strbuf_setlen(&sb, sb.len - strlen("config"));
370 strbuf_addstr(&sb, "worktrees");
371
372 /* See if there is any file inside the worktrees directory. */
373 dir = opendir(sb.buf);
374 strbuf_release(&sb);
Stefan Beller1a248cf2016-12-12 19:04:33[diff] [blame]375
376 if (!dir)
377 return 0;
378
379 while ((d = readdir(dir)) != NULL) {
380 if (is_dot_or_dotdot(d->d_name))
381 continue;
382
383 ret = 1;
384 break;
385 }
386 closedir(dir);
387 return ret;
388}