grep: remove redundant REG_NEWLINE when compiling fixed regex
[git.git] / worktree.c
blob2801c6d52bdaa1fb83a0069c8d2217ea129fd6bf
1 #include "cache.h"
2 #include "refs.h"
3 #include "strbuf.h"
4 #include "worktree.h"
5 #include "dir.h"
6 #include "wt-status.h"
8 void free_worktrees(struct worktree **worktrees)
10 int i = 0;
12 for (i = 0; worktrees[i]; i++) {
13 free(worktrees[i]->path);
14 free(worktrees[i]->id);
15 free(worktrees[i]->head_ref);
16 free(worktrees[i]->lock_reason);
17 free(worktrees[i]);
19 free (worktrees);
22 /**
23 * Update head_sha1, head_ref and is_detached of the given worktree
25 static void add_head_info(struct worktree *wt)
27 int flags;
28 const char *target;
30 target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt),
31 "HEAD",
32 RESOLVE_REF_READING,
33 wt->head_sha1, &flags);
34 if (!target)
35 return;
37 if (flags & REF_ISSYMREF)
38 wt->head_ref = xstrdup(target);
39 else
40 wt->is_detached = 1;
43 /**
44 * get the main worktree
46 static struct worktree *get_main_worktree(void)
48 struct worktree *worktree = NULL;
49 struct strbuf path = STRBUF_INIT;
50 struct strbuf worktree_path = STRBUF_INIT;
51 int is_bare = 0;
53 strbuf_add_absolute_path(&worktree_path, get_git_common_dir());
54 is_bare = !strbuf_strip_suffix(&worktree_path, "/.git");
55 if (is_bare)
56 strbuf_strip_suffix(&worktree_path, "/.");
58 strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
60 worktree = xcalloc(1, sizeof(*worktree));
61 worktree->path = strbuf_detach(&worktree_path, NULL);
62 worktree->is_bare = is_bare;
63 add_head_info(worktree);
65 strbuf_release(&path);
66 strbuf_release(&worktree_path);
67 return worktree;
70 static struct worktree *get_linked_worktree(const char *id)
72 struct worktree *worktree = NULL;
73 struct strbuf path = STRBUF_INIT;
74 struct strbuf worktree_path = STRBUF_INIT;
76 if (!id)
77 die("Missing linked worktree name");
79 strbuf_git_common_path(&path, "worktrees/%s/gitdir", id);
80 if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0)
81 /* invalid gitdir file */
82 goto done;
84 strbuf_rtrim(&worktree_path);
85 if (!strbuf_strip_suffix(&worktree_path, "/.git")) {
86 strbuf_reset(&worktree_path);
87 strbuf_add_absolute_path(&worktree_path, ".");
88 strbuf_strip_suffix(&worktree_path, "/.");
91 strbuf_reset(&path);
92 strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
94 worktree = xcalloc(1, sizeof(*worktree));
95 worktree->path = strbuf_detach(&worktree_path, NULL);
96 worktree->id = xstrdup(id);
97 add_head_info(worktree);
99 done:
100 strbuf_release(&path);
101 strbuf_release(&worktree_path);
102 return worktree;
105 static void mark_current_worktree(struct worktree **worktrees)
107 char *git_dir = absolute_pathdup(get_git_dir());
108 int i;
110 for (i = 0; worktrees[i]; i++) {
111 struct worktree *wt = worktrees[i];
112 const char *wt_git_dir = get_worktree_git_dir(wt);
114 if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) {
115 wt->is_current = 1;
116 break;
119 free(git_dir);
122 static int compare_worktree(const void *a_, const void *b_)
124 const struct worktree *const *a = a_;
125 const struct worktree *const *b = b_;
126 return fspathcmp((*a)->path, (*b)->path);
129 struct worktree **get_worktrees(unsigned flags)
131 struct worktree **list = NULL;
132 struct strbuf path = STRBUF_INIT;
133 DIR *dir;
134 struct dirent *d;
135 int counter = 0, alloc = 2;
137 ALLOC_ARRAY(list, alloc);
139 list[counter++] = get_main_worktree();
141 strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
142 dir = opendir(path.buf);
143 strbuf_release(&path);
144 if (dir) {
145 while ((d = readdir(dir)) != NULL) {
146 struct worktree *linked = NULL;
147 if (is_dot_or_dotdot(d->d_name))
148 continue;
150 if ((linked = get_linked_worktree(d->d_name))) {
151 ALLOC_GROW(list, counter + 1, alloc);
152 list[counter++] = linked;
155 closedir(dir);
157 ALLOC_GROW(list, counter + 1, alloc);
158 list[counter] = NULL;
160 if (flags & GWT_SORT_LINKED)
162 * don't sort the first item (main worktree), which will
163 * always be the first
165 QSORT(list + 1, counter - 1, compare_worktree);
167 mark_current_worktree(list);
168 return list;
171 const char *get_worktree_git_dir(const struct worktree *wt)
173 if (!wt)
174 return get_git_dir();
175 else if (!wt->id)
176 return get_git_common_dir();
177 else
178 return git_common_path("worktrees/%s", wt->id);
181 static struct worktree *find_worktree_by_suffix(struct worktree **list,
182 const char *suffix)
184 struct worktree *found = NULL;
185 int nr_found = 0, suffixlen;
187 suffixlen = strlen(suffix);
188 if (!suffixlen)
189 return NULL;
191 for (; *list && nr_found < 2; list++) {
192 const char *path = (*list)->path;
193 int pathlen = strlen(path);
194 int start = pathlen - suffixlen;
196 /* suffix must start at directory boundary */
197 if ((!start || (start > 0 && is_dir_sep(path[start - 1]))) &&
198 !fspathcmp(suffix, path + start)) {
199 found = *list;
200 nr_found++;
203 return nr_found == 1 ? found : NULL;
206 struct worktree *find_worktree(struct worktree **list,
207 const char *prefix,
208 const char *arg)
210 struct worktree *wt;
211 char *path;
212 char *to_free = NULL;
214 if ((wt = find_worktree_by_suffix(list, arg)))
215 return wt;
217 if (prefix)
218 arg = to_free = prefix_filename(prefix, arg);
219 path = real_pathdup(arg, 1);
220 for (; *list; list++)
221 if (!fspathcmp(path, real_path((*list)->path)))
222 break;
223 free(path);
224 free(to_free);
225 return *list;
228 int is_main_worktree(const struct worktree *wt)
230 return !wt->id;
233 const char *is_worktree_locked(struct worktree *wt)
235 assert(!is_main_worktree(wt));
237 if (!wt->lock_reason_valid) {
238 struct strbuf path = STRBUF_INIT;
240 strbuf_addstr(&path, worktree_git_path(wt, "locked"));
241 if (file_exists(path.buf)) {
242 struct strbuf lock_reason = STRBUF_INIT;
243 if (strbuf_read_file(&lock_reason, path.buf, 0) < 0)
244 die_errno(_("failed to read '%s'"), path.buf);
245 strbuf_trim(&lock_reason);
246 wt->lock_reason = strbuf_detach(&lock_reason, NULL);
247 } else
248 wt->lock_reason = NULL;
249 wt->lock_reason_valid = 1;
250 strbuf_release(&path);
253 return wt->lock_reason;
256 int is_worktree_being_rebased(const struct worktree *wt,
257 const char *target)
259 struct wt_status_state state;
260 int found_rebase;
262 memset(&state, 0, sizeof(state));
263 found_rebase = wt_status_check_rebase(wt, &state) &&
264 ((state.rebase_in_progress ||
265 state.rebase_interactive_in_progress) &&
266 state.branch &&
267 starts_with(target, "refs/heads/") &&
268 !strcmp(state.branch, target + strlen("refs/heads/")));
269 free(state.branch);
270 free(state.onto);
271 return found_rebase;
274 int is_worktree_being_bisected(const struct worktree *wt,
275 const char *target)
277 struct wt_status_state state;
278 int found_rebase;
280 memset(&state, 0, sizeof(state));
281 found_rebase = wt_status_check_bisect(wt, &state) &&
282 state.branch &&
283 starts_with(target, "refs/heads/") &&
284 !strcmp(state.branch, target + strlen("refs/heads/"));
285 free(state.branch);
286 return found_rebase;
290 * note: this function should be able to detect shared symref even if
291 * HEAD is temporarily detached (e.g. in the middle of rebase or
292 * bisect). New commands that do similar things should update this
293 * function as well.
295 const struct worktree *find_shared_symref(const char *symref,
296 const char *target)
298 const struct worktree *existing = NULL;
299 static struct worktree **worktrees;
300 int i = 0;
302 if (worktrees)
303 free_worktrees(worktrees);
304 worktrees = get_worktrees(0);
306 for (i = 0; worktrees[i]; i++) {
307 struct worktree *wt = worktrees[i];
308 const char *symref_target;
309 unsigned char sha1[20];
310 struct ref_store *refs;
311 int flags;
313 if (wt->is_bare)
314 continue;
316 if (wt->is_detached && !strcmp(symref, "HEAD")) {
317 if (is_worktree_being_rebased(wt, target)) {
318 existing = wt;
319 break;
321 if (is_worktree_being_bisected(wt, target)) {
322 existing = wt;
323 break;
327 refs = get_worktree_ref_store(wt);
328 symref_target = refs_resolve_ref_unsafe(refs, symref, 0,
329 sha1, &flags);
330 if ((flags & REF_ISSYMREF) && !strcmp(symref_target, target)) {
331 existing = wt;
332 break;
336 return existing;
339 int submodule_uses_worktrees(const char *path)
341 char *submodule_gitdir;
342 struct strbuf sb = STRBUF_INIT;
343 DIR *dir;
344 struct dirent *d;
345 int ret = 0;
346 struct repository_format format;
348 submodule_gitdir = git_pathdup_submodule(path, "%s", "");
349 if (!submodule_gitdir)
350 return 0;
352 /* The env would be set for the superproject. */
353 get_common_dir_noenv(&sb, submodule_gitdir);
354 free(submodule_gitdir);
357 * The check below is only known to be good for repository format
358 * version 0 at the time of writing this code.
360 strbuf_addstr(&sb, "/config");
361 read_repository_format(&format, sb.buf);
362 if (format.version != 0) {
363 strbuf_release(&sb);
364 return 1;
367 /* Replace config by worktrees. */
368 strbuf_setlen(&sb, sb.len - strlen("config"));
369 strbuf_addstr(&sb, "worktrees");
371 /* See if there is any file inside the worktrees directory. */
372 dir = opendir(sb.buf);
373 strbuf_release(&sb);
375 if (!dir)
376 return 0;
378 while ((d = readdir(dir)) != NULL) {
379 if (is_dot_or_dotdot(d->d_name))
380 continue;
382 ret = 1;
383 break;
385 closedir(dir);
386 return ret;