2 * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include <sys/queue.h>
31 #include "got_cancel.h"
32 #include "got_error.h"
33 #include "got_reference.h"
35 #include "got_worktree.h"
36 #include "got_repository.h"
37 #include "got_gotconfig.h"
38 #include "got_object.h"
40 #include "got_lib_worktree.h"
41 #include "got_lib_gotconfig.h"
43 static const struct got_error *
44 read_meta_file(char **content, const char *path_got, const char *name)
46 const struct got_error *err = NULL;
54 if (asprintf(&path, "%s/%s", path_got, name) == -1) {
55 err = got_error_from_errno("asprintf");
60 fd = open(path, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
63 err = got_error_path(path, GOT_ERR_WORKTREE_META);
65 err = got_error_from_errno2("open", path);
68 if (flock(fd, LOCK_SH | LOCK_NB) == -1) {
69 err = (errno == EWOULDBLOCK ? got_error(GOT_ERR_WORKTREE_BUSY)
70 : got_error_from_errno2("flock", path));
74 if (fstat(fd, &sb) != 0) {
75 err = got_error_from_errno2("fstat", path);
78 *content = calloc(1, sb.st_size);
79 if (*content == NULL) {
80 err = got_error_from_errno("calloc");
84 n = read(fd, *content, sb.st_size);
85 if (n != sb.st_size) {
86 err = (n == -1 ? got_error_from_errno2("read", path) :
87 got_error_path(path, GOT_ERR_WORKTREE_META));
90 if ((*content)[sb.st_size - 1] != '\n') {
91 err = got_error_path(path, GOT_ERR_WORKTREE_META);
94 (*content)[sb.st_size - 1] = '\0';
97 if (fd != -1 && close(fd) == -1 && err == NULL)
98 err = got_error_from_errno2("close", path_got);
107 static const struct got_error *
108 open_worktree(struct got_worktree **worktree, const char *path)
110 const struct got_error *err = NULL;
112 char *formatstr = NULL;
113 char *uuidstr = NULL;
114 char *path_lock = NULL;
115 char *base_commit_id_str = NULL;
116 int version, fd = -1;
118 struct got_repository *repo = NULL;
119 uint32_t uuid_status;
123 if (asprintf(&path_got, "%s/%s", path, GOT_WORKTREE_GOT_DIR) == -1) {
124 err = got_error_from_errno("asprintf");
129 if (asprintf(&path_lock, "%s/%s", path_got, GOT_WORKTREE_LOCK) == -1) {
130 err = got_error_from_errno("asprintf");
135 fd = open(path_lock, O_RDWR | O_EXLOCK | O_NONBLOCK | O_CLOEXEC);
137 err = (errno == EWOULDBLOCK ? got_error(GOT_ERR_WORKTREE_BUSY)
138 : got_error_from_errno2("open", path_lock));
142 err = read_meta_file(&formatstr, path_got, GOT_WORKTREE_FORMAT);
146 version = strtonum(formatstr, 1, INT_MAX, &errstr);
148 err = got_error_msg(GOT_ERR_WORKTREE_META,
149 "could not parse work tree format version number");
152 if (version != GOT_WORKTREE_FORMAT_VERSION) {
153 err = got_error(GOT_ERR_WORKTREE_VERS);
157 *worktree = calloc(1, sizeof(**worktree));
158 if (*worktree == NULL) {
159 err = got_error_from_errno("calloc");
162 (*worktree)->lockfd = -1;
164 (*worktree)->root_path = realpath(path, NULL);
165 if ((*worktree)->root_path == NULL) {
166 err = got_error_from_errno2("realpath", path);
169 err = read_meta_file(&(*worktree)->repo_path, path_got,
170 GOT_WORKTREE_REPOSITORY);
174 err = read_meta_file(&(*worktree)->path_prefix, path_got,
175 GOT_WORKTREE_PATH_PREFIX);
179 err = read_meta_file(&base_commit_id_str, path_got,
180 GOT_WORKTREE_BASE_COMMIT);
184 err = read_meta_file(&uuidstr, path_got, GOT_WORKTREE_UUID);
187 uuid_from_string(uuidstr, &(*worktree)->uuid, &uuid_status);
188 if (uuid_status != uuid_s_ok) {
189 err = got_error_uuid(uuid_status, "uuid_from_string");
193 err = got_repo_open(&repo, (*worktree)->repo_path, NULL);
197 err = got_object_resolve_id_str(&(*worktree)->base_commit_id, repo,
202 err = read_meta_file(&(*worktree)->head_ref_name, path_got,
203 GOT_WORKTREE_HEAD_REF);
207 if (asprintf(&(*worktree)->gotconfig_path, "%s/%s/%s",
208 (*worktree)->root_path,
209 GOT_WORKTREE_GOT_DIR, GOT_GOTCONFIG_FILENAME) == -1) {
210 err = got_error_from_errno("asprintf");
214 err = got_gotconfig_read(&(*worktree)->gotconfig,
215 (*worktree)->gotconfig_path);
217 (*worktree)->root_fd = open((*worktree)->root_path,
218 O_DIRECTORY | O_CLOEXEC);
219 if ((*worktree)->root_fd == -1) {
220 err = got_error_from_errno2("open", (*worktree)->root_path);
225 const struct got_error *close_err = got_repo_close(repo);
231 free(base_commit_id_str);
237 if (*worktree != NULL)
238 got_worktree_close(*worktree);
241 (*worktree)->lockfd = fd;
246 const struct got_error *
247 got_worktree_open(struct got_worktree **worktree, const char *path)
249 const struct got_error *err = NULL;
252 worktree_path = strdup(path);
253 if (worktree_path == NULL)
254 return got_error_from_errno("strdup");
259 err = open_worktree(worktree, worktree_path);
260 if (err && !(err->code == GOT_ERR_ERRNO && errno == ENOENT)) {
268 if (worktree_path[0] == '/' && worktree_path[1] == '\0')
270 err = got_path_dirname(&parent_path, worktree_path);
272 if (err->code != GOT_ERR_BAD_PATH) {
279 worktree_path = parent_path;
283 return got_error(GOT_ERR_NOT_WORKTREE);
286 const struct got_error *
287 got_worktree_close(struct got_worktree *worktree)
289 const struct got_error *err = NULL;
291 if (worktree->lockfd != -1) {
292 if (close(worktree->lockfd) == -1)
293 err = got_error_from_errno2("close",
294 got_worktree_get_root_path(worktree));
296 if (close(worktree->root_fd) == -1 && err == NULL)
297 err = got_error_from_errno2("close",
298 got_worktree_get_root_path(worktree));
299 free(worktree->repo_path);
300 free(worktree->path_prefix);
301 free(worktree->base_commit_id);
302 free(worktree->head_ref_name);
303 free(worktree->root_path);
304 free(worktree->gotconfig_path);
305 got_gotconfig_free(worktree->gotconfig);
311 got_worktree_get_root_path(struct got_worktree *worktree)
313 return worktree->root_path;
317 got_worktree_get_repo_path(struct got_worktree *worktree)
319 return worktree->repo_path;
323 got_worktree_get_path_prefix(struct got_worktree *worktree)
325 return worktree->path_prefix;