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>
32 #include "got_cancel.h"
33 #include "got_error.h"
34 #include "got_reference.h"
36 #include "got_worktree.h"
37 #include "got_repository.h"
38 #include "got_gotconfig.h"
39 #include "got_object.h"
41 #include "got_lib_worktree.h"
42 #include "got_lib_gotconfig.h"
44 static const struct got_error *
45 read_meta_file(char **content, const char *path_got, const char *name)
47 const struct got_error *err = NULL;
55 if (asprintf(&path, "%s/%s", path_got, name) == -1) {
56 err = got_error_from_errno("asprintf");
61 fd = open(path, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
64 err = got_error_path(path, GOT_ERR_WORKTREE_META);
66 err = got_error_from_errno2("open", path);
69 if (flock(fd, LOCK_SH | LOCK_NB) == -1) {
70 err = (errno == EWOULDBLOCK ? got_error(GOT_ERR_WORKTREE_BUSY)
71 : got_error_from_errno2("flock", path));
75 if (fstat(fd, &sb) != 0) {
76 err = got_error_from_errno2("fstat", path);
79 *content = calloc(1, sb.st_size);
80 if (*content == NULL) {
81 err = got_error_from_errno("calloc");
85 n = read(fd, *content, sb.st_size);
86 if (n != sb.st_size) {
87 err = (n == -1 ? got_error_from_errno2("read", path) :
88 got_error_path(path, GOT_ERR_WORKTREE_META));
91 if ((*content)[sb.st_size - 1] != '\n') {
92 err = got_error_path(path, GOT_ERR_WORKTREE_META);
95 (*content)[sb.st_size - 1] = '\0';
98 if (fd != -1 && close(fd) == -1 && err == NULL)
99 err = got_error_from_errno2("close", path_got);
108 static const struct got_error *
109 open_worktree(struct got_worktree **worktree, const char *path)
111 const struct got_error *err = NULL;
113 char *formatstr = NULL;
114 char *uuidstr = NULL;
115 char *path_lock = NULL;
116 char *base_commit_id_str = NULL;
117 int version, fd = -1;
119 struct got_repository *repo = NULL;
120 int *pack_fds = NULL;
121 uint32_t uuid_status;
125 if (asprintf(&path_got, "%s/%s", path, GOT_WORKTREE_GOT_DIR) == -1) {
126 err = got_error_from_errno("asprintf");
131 if (asprintf(&path_lock, "%s/%s", path_got, GOT_WORKTREE_LOCK) == -1) {
132 err = got_error_from_errno("asprintf");
137 fd = open(path_lock, O_RDWR | O_EXLOCK | O_NONBLOCK | O_CLOEXEC);
139 err = (errno == EWOULDBLOCK ? got_error(GOT_ERR_WORKTREE_BUSY)
140 : got_error_from_errno2("open", path_lock));
144 err = read_meta_file(&formatstr, path_got, GOT_WORKTREE_FORMAT);
148 version = strtonum(formatstr, 1, INT_MAX, &errstr);
150 err = got_error_msg(GOT_ERR_WORKTREE_META,
151 "could not parse work tree format version number");
154 if (version != GOT_WORKTREE_FORMAT_VERSION) {
155 err = got_error(GOT_ERR_WORKTREE_VERS);
159 *worktree = calloc(1, sizeof(**worktree));
160 if (*worktree == NULL) {
161 err = got_error_from_errno("calloc");
164 (*worktree)->lockfd = -1;
166 (*worktree)->root_path = realpath(path, NULL);
167 if ((*worktree)->root_path == NULL) {
168 err = got_error_from_errno2("realpath", path);
171 err = read_meta_file(&(*worktree)->repo_path, path_got,
172 GOT_WORKTREE_REPOSITORY);
176 err = read_meta_file(&(*worktree)->path_prefix, path_got,
177 GOT_WORKTREE_PATH_PREFIX);
181 err = read_meta_file(&base_commit_id_str, path_got,
182 GOT_WORKTREE_BASE_COMMIT);
186 err = read_meta_file(&uuidstr, path_got, GOT_WORKTREE_UUID);
189 uuid_from_string(uuidstr, &(*worktree)->uuid, &uuid_status);
190 if (uuid_status != uuid_s_ok) {
191 err = got_error_uuid(uuid_status, "uuid_from_string");
195 err = got_repo_pack_fds_open(&pack_fds);
199 err = got_repo_open(&repo, (*worktree)->repo_path, NULL, pack_fds);
203 err = got_object_resolve_id_str(&(*worktree)->base_commit_id, repo,
208 err = read_meta_file(&(*worktree)->head_ref_name, path_got,
209 GOT_WORKTREE_HEAD_REF);
213 if (asprintf(&(*worktree)->gotconfig_path, "%s/%s/%s",
214 (*worktree)->root_path,
215 GOT_WORKTREE_GOT_DIR, GOT_GOTCONFIG_FILENAME) == -1) {
216 err = got_error_from_errno("asprintf");
220 err = got_gotconfig_read(&(*worktree)->gotconfig,
221 (*worktree)->gotconfig_path);
225 (*worktree)->root_fd = open((*worktree)->root_path,
226 O_DIRECTORY | O_CLOEXEC);
227 if ((*worktree)->root_fd == -1) {
228 err = got_error_from_errno2("open", (*worktree)->root_path);
233 const struct got_error *close_err = got_repo_close(repo);
238 const struct got_error *pack_err =
239 got_repo_pack_fds_close(pack_fds);
245 free(base_commit_id_str);
251 if (*worktree != NULL)
252 got_worktree_close(*worktree);
255 (*worktree)->lockfd = fd;
260 const struct got_error *
261 got_worktree_open(struct got_worktree **worktree, const char *path)
263 const struct got_error *err = NULL;
266 worktree_path = strdup(path);
267 if (worktree_path == NULL)
268 return got_error_from_errno("strdup");
273 err = open_worktree(worktree, worktree_path);
274 if (err && !(err->code == GOT_ERR_ERRNO && errno == ENOENT)) {
282 if (worktree_path[0] == '/' && worktree_path[1] == '\0')
284 err = got_path_dirname(&parent_path, worktree_path);
286 if (err->code != GOT_ERR_BAD_PATH) {
293 worktree_path = parent_path;
297 return got_error(GOT_ERR_NOT_WORKTREE);
300 const struct got_error *
301 got_worktree_close(struct got_worktree *worktree)
303 const struct got_error *err = NULL;
305 if (worktree->lockfd != -1) {
306 if (close(worktree->lockfd) == -1)
307 err = got_error_from_errno2("close",
308 got_worktree_get_root_path(worktree));
310 if (close(worktree->root_fd) == -1 && err == NULL)
311 err = got_error_from_errno2("close",
312 got_worktree_get_root_path(worktree));
313 free(worktree->repo_path);
314 free(worktree->path_prefix);
315 free(worktree->base_commit_id);
316 free(worktree->head_ref_name);
317 free(worktree->root_path);
318 free(worktree->gotconfig_path);
319 got_gotconfig_free(worktree->gotconfig);
325 got_worktree_get_root_path(struct got_worktree *worktree)
327 return worktree->root_path;
331 got_worktree_get_repo_path(struct got_worktree *worktree)
333 return worktree->repo_path;
337 got_worktree_get_path_prefix(struct got_worktree *worktree)
339 return worktree->path_prefix;