2 7d69d862 2021-11-15 stsp * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 7d69d862 2021-11-15 stsp * Permission to use, copy, modify, and distribute this software for any
5 7d69d862 2021-11-15 stsp * purpose with or without fee is hereby granted, provided that the above
6 7d69d862 2021-11-15 stsp * copyright notice and this permission notice appear in all copies.
8 7d69d862 2021-11-15 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 7d69d862 2021-11-15 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 7d69d862 2021-11-15 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 7d69d862 2021-11-15 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 7d69d862 2021-11-15 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 7d69d862 2021-11-15 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 7d69d862 2021-11-15 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 7d69d862 2021-11-15 stsp #include <sys/stat.h>
18 7d69d862 2021-11-15 stsp #include <sys/queue.h>
20 7d69d862 2021-11-15 stsp #include <errno.h>
21 7d69d862 2021-11-15 stsp #include <fcntl.h>
22 7d69d862 2021-11-15 stsp #include <limits.h>
23 d7b5a0e8 2022-04-20 stsp #include <sha1.h>
24 5822e79e 2023-02-23 op #include <sha2.h>
25 7d69d862 2021-11-15 stsp #include <stddef.h>
26 7d69d862 2021-11-15 stsp #include <stdio.h>
27 7d69d862 2021-11-15 stsp #include <stdlib.h>
28 7d69d862 2021-11-15 stsp #include <string.h>
29 7d69d862 2021-11-15 stsp #include <unistd.h>
30 7d69d862 2021-11-15 stsp #include <uuid.h>
32 7d69d862 2021-11-15 stsp #include "got_cancel.h"
33 7d69d862 2021-11-15 stsp #include "got_error.h"
34 7d69d862 2021-11-15 stsp #include "got_reference.h"
35 7d69d862 2021-11-15 stsp #include "got_path.h"
36 7d69d862 2021-11-15 stsp #include "got_worktree.h"
37 7d69d862 2021-11-15 stsp #include "got_repository.h"
38 7d69d862 2021-11-15 stsp #include "got_gotconfig.h"
39 7d69d862 2021-11-15 stsp #include "got_object.h"
41 7d69d862 2021-11-15 stsp #include "got_lib_worktree.h"
42 7d69d862 2021-11-15 stsp #include "got_lib_gotconfig.h"
44 7d69d862 2021-11-15 stsp static const struct got_error *
45 7d69d862 2021-11-15 stsp read_meta_file(char **content, const char *path_got, const char *name)
47 7d69d862 2021-11-15 stsp const struct got_error *err = NULL;
49 7d69d862 2021-11-15 stsp int fd = -1;
51 7d69d862 2021-11-15 stsp struct stat sb;
53 7d69d862 2021-11-15 stsp *content = NULL;
55 7d69d862 2021-11-15 stsp if (asprintf(&path, "%s/%s", path_got, name) == -1) {
56 7d69d862 2021-11-15 stsp err = got_error_from_errno("asprintf");
57 7d69d862 2021-11-15 stsp path = NULL;
61 8bd0cdad 2021-12-31 stsp fd = open(path, O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
62 7d69d862 2021-11-15 stsp if (fd == -1) {
63 7d69d862 2021-11-15 stsp if (errno == ENOENT)
64 7d69d862 2021-11-15 stsp err = got_error_path(path, GOT_ERR_WORKTREE_META);
66 7d69d862 2021-11-15 stsp err = got_error_from_errno2("open", path);
69 7d69d862 2021-11-15 stsp if (flock(fd, LOCK_SH | LOCK_NB) == -1) {
70 7d69d862 2021-11-15 stsp err = (errno == EWOULDBLOCK ? got_error(GOT_ERR_WORKTREE_BUSY)
71 7d69d862 2021-11-15 stsp : got_error_from_errno2("flock", path));
75 7d69d862 2021-11-15 stsp if (fstat(fd, &sb) != 0) {
76 7d69d862 2021-11-15 stsp err = got_error_from_errno2("fstat", path);
79 7d69d862 2021-11-15 stsp *content = calloc(1, sb.st_size);
80 7d69d862 2021-11-15 stsp if (*content == NULL) {
81 7d69d862 2021-11-15 stsp err = got_error_from_errno("calloc");
85 7d69d862 2021-11-15 stsp n = read(fd, *content, sb.st_size);
86 7d69d862 2021-11-15 stsp if (n != sb.st_size) {
87 7d69d862 2021-11-15 stsp err = (n == -1 ? got_error_from_errno2("read", path) :
88 7d69d862 2021-11-15 stsp got_error_path(path, GOT_ERR_WORKTREE_META));
91 7d69d862 2021-11-15 stsp if ((*content)[sb.st_size - 1] != '\n') {
92 7d69d862 2021-11-15 stsp err = got_error_path(path, GOT_ERR_WORKTREE_META);
95 7d69d862 2021-11-15 stsp (*content)[sb.st_size - 1] = '\0';
98 7d69d862 2021-11-15 stsp if (fd != -1 && close(fd) == -1 && err == NULL)
99 7d69d862 2021-11-15 stsp err = got_error_from_errno2("close", path_got);
100 7d69d862 2021-11-15 stsp free(path);
102 7d69d862 2021-11-15 stsp free(*content);
103 7d69d862 2021-11-15 stsp *content = NULL;
105 7d69d862 2021-11-15 stsp return err;
108 7d69d862 2021-11-15 stsp static const struct got_error *
109 7d69d862 2021-11-15 stsp open_worktree(struct got_worktree **worktree, const char *path)
111 7d69d862 2021-11-15 stsp const struct got_error *err = NULL;
112 7d69d862 2021-11-15 stsp char *path_got;
113 7d69d862 2021-11-15 stsp char *formatstr = NULL;
114 7d69d862 2021-11-15 stsp char *uuidstr = NULL;
115 7d69d862 2021-11-15 stsp char *path_lock = NULL;
116 7d69d862 2021-11-15 stsp char *base_commit_id_str = NULL;
117 7d69d862 2021-11-15 stsp int version, fd = -1;
118 7d69d862 2021-11-15 stsp const char *errstr;
119 7d69d862 2021-11-15 stsp struct got_repository *repo = NULL;
120 5a950d09 2022-06-15 stsp int *pack_fds = NULL;
121 7d69d862 2021-11-15 stsp uint32_t uuid_status;
123 7d69d862 2021-11-15 stsp *worktree = NULL;
125 7d69d862 2021-11-15 stsp if (asprintf(&path_got, "%s/%s", path, GOT_WORKTREE_GOT_DIR) == -1) {
126 7d69d862 2021-11-15 stsp err = got_error_from_errno("asprintf");
127 7d69d862 2021-11-15 stsp path_got = NULL;
131 7d69d862 2021-11-15 stsp if (asprintf(&path_lock, "%s/%s", path_got, GOT_WORKTREE_LOCK) == -1) {
132 7d69d862 2021-11-15 stsp err = got_error_from_errno("asprintf");
133 7d69d862 2021-11-15 stsp path_lock = NULL;
137 8bd0cdad 2021-12-31 stsp fd = open(path_lock, O_RDWR | O_EXLOCK | O_NONBLOCK | O_CLOEXEC);
138 7d69d862 2021-11-15 stsp if (fd == -1) {
139 7d69d862 2021-11-15 stsp err = (errno == EWOULDBLOCK ? got_error(GOT_ERR_WORKTREE_BUSY)
140 7d69d862 2021-11-15 stsp : got_error_from_errno2("open", path_lock));
144 7d69d862 2021-11-15 stsp err = read_meta_file(&formatstr, path_got, GOT_WORKTREE_FORMAT);
148 7d69d862 2021-11-15 stsp version = strtonum(formatstr, 1, INT_MAX, &errstr);
149 7d69d862 2021-11-15 stsp if (errstr) {
150 7d69d862 2021-11-15 stsp err = got_error_msg(GOT_ERR_WORKTREE_META,
151 7d69d862 2021-11-15 stsp "could not parse work tree format version number");
154 7d69d862 2021-11-15 stsp if (version != GOT_WORKTREE_FORMAT_VERSION) {
155 7d69d862 2021-11-15 stsp err = got_error(GOT_ERR_WORKTREE_VERS);
159 7d69d862 2021-11-15 stsp *worktree = calloc(1, sizeof(**worktree));
160 7d69d862 2021-11-15 stsp if (*worktree == NULL) {
161 7d69d862 2021-11-15 stsp err = got_error_from_errno("calloc");
164 7d69d862 2021-11-15 stsp (*worktree)->lockfd = -1;
166 7d69d862 2021-11-15 stsp (*worktree)->root_path = realpath(path, NULL);
167 7d69d862 2021-11-15 stsp if ((*worktree)->root_path == NULL) {
168 7d69d862 2021-11-15 stsp err = got_error_from_errno2("realpath", path);
171 7d69d862 2021-11-15 stsp err = read_meta_file(&(*worktree)->repo_path, path_got,
172 7d69d862 2021-11-15 stsp GOT_WORKTREE_REPOSITORY);
176 7d69d862 2021-11-15 stsp err = read_meta_file(&(*worktree)->path_prefix, path_got,
177 7d69d862 2021-11-15 stsp GOT_WORKTREE_PATH_PREFIX);
181 7d69d862 2021-11-15 stsp err = read_meta_file(&base_commit_id_str, path_got,
182 7d69d862 2021-11-15 stsp GOT_WORKTREE_BASE_COMMIT);
186 7d69d862 2021-11-15 stsp err = read_meta_file(&uuidstr, path_got, GOT_WORKTREE_UUID);
189 7d69d862 2021-11-15 stsp uuid_from_string(uuidstr, &(*worktree)->uuid, &uuid_status);
190 7d69d862 2021-11-15 stsp if (uuid_status != uuid_s_ok) {
191 7d69d862 2021-11-15 stsp err = got_error_uuid(uuid_status, "uuid_from_string");
195 5a950d09 2022-06-15 stsp err = got_repo_pack_fds_open(&pack_fds);
199 5a950d09 2022-06-15 stsp err = got_repo_open(&repo, (*worktree)->repo_path, NULL, pack_fds);
201 0ae84acc 2022-06-15 tracey goto done;
203 7d69d862 2021-11-15 stsp err = got_object_resolve_id_str(&(*worktree)->base_commit_id, repo,
204 7d69d862 2021-11-15 stsp base_commit_id_str);
208 7d69d862 2021-11-15 stsp err = read_meta_file(&(*worktree)->head_ref_name, path_got,
209 7d69d862 2021-11-15 stsp GOT_WORKTREE_HEAD_REF);
213 7d69d862 2021-11-15 stsp if (asprintf(&(*worktree)->gotconfig_path, "%s/%s/%s",
214 7d69d862 2021-11-15 stsp (*worktree)->root_path,
215 7d69d862 2021-11-15 stsp GOT_WORKTREE_GOT_DIR, GOT_GOTCONFIG_FILENAME) == -1) {
216 7d69d862 2021-11-15 stsp err = got_error_from_errno("asprintf");
220 7d69d862 2021-11-15 stsp err = got_gotconfig_read(&(*worktree)->gotconfig,
221 7d69d862 2021-11-15 stsp (*worktree)->gotconfig_path);
225 8bd0cdad 2021-12-31 stsp (*worktree)->root_fd = open((*worktree)->root_path,
226 8bd0cdad 2021-12-31 stsp O_DIRECTORY | O_CLOEXEC);
227 7d69d862 2021-11-15 stsp if ((*worktree)->root_fd == -1) {
228 7d69d862 2021-11-15 stsp err = got_error_from_errno2("open", (*worktree)->root_path);
232 7d69d862 2021-11-15 stsp if (repo) {
233 7d69d862 2021-11-15 stsp const struct got_error *close_err = got_repo_close(repo);
234 7d69d862 2021-11-15 stsp if (err == NULL)
235 7d69d862 2021-11-15 stsp err = close_err;
237 5a950d09 2022-06-15 stsp if (pack_fds) {
238 5a950d09 2022-06-15 stsp const struct got_error *pack_err =
239 5a950d09 2022-06-15 stsp got_repo_pack_fds_close(pack_fds);
240 5a950d09 2022-06-15 stsp if (err == NULL)
241 5a950d09 2022-06-15 stsp err = pack_err;
243 7d69d862 2021-11-15 stsp free(path_got);
244 7d69d862 2021-11-15 stsp free(path_lock);
245 7d69d862 2021-11-15 stsp free(base_commit_id_str);
246 7d69d862 2021-11-15 stsp free(uuidstr);
247 7d69d862 2021-11-15 stsp free(formatstr);
249 7d69d862 2021-11-15 stsp if (fd != -1)
251 7d69d862 2021-11-15 stsp if (*worktree != NULL)
252 7d69d862 2021-11-15 stsp got_worktree_close(*worktree);
253 7d69d862 2021-11-15 stsp *worktree = NULL;
255 7d69d862 2021-11-15 stsp (*worktree)->lockfd = fd;
257 7d69d862 2021-11-15 stsp return err;
260 7d69d862 2021-11-15 stsp const struct got_error *
261 7d69d862 2021-11-15 stsp got_worktree_open(struct got_worktree **worktree, const char *path)
263 7d69d862 2021-11-15 stsp const struct got_error *err = NULL;
264 7d69d862 2021-11-15 stsp char *worktree_path;
266 7d69d862 2021-11-15 stsp worktree_path = strdup(path);
267 7d69d862 2021-11-15 stsp if (worktree_path == NULL)
268 7d69d862 2021-11-15 stsp return got_error_from_errno("strdup");
271 7d69d862 2021-11-15 stsp char *parent_path;
273 7d69d862 2021-11-15 stsp err = open_worktree(worktree, worktree_path);
274 7d69d862 2021-11-15 stsp if (err && !(err->code == GOT_ERR_ERRNO && errno == ENOENT)) {
275 7d69d862 2021-11-15 stsp free(worktree_path);
276 7d69d862 2021-11-15 stsp return err;
278 7d69d862 2021-11-15 stsp if (*worktree) {
279 7d69d862 2021-11-15 stsp free(worktree_path);
280 7d69d862 2021-11-15 stsp return NULL;
282 7d69d862 2021-11-15 stsp if (worktree_path[0] == '/' && worktree_path[1] == '\0')
284 7d69d862 2021-11-15 stsp err = got_path_dirname(&parent_path, worktree_path);
286 7d69d862 2021-11-15 stsp if (err->code != GOT_ERR_BAD_PATH) {
287 7d69d862 2021-11-15 stsp free(worktree_path);
288 7d69d862 2021-11-15 stsp return err;
292 7d69d862 2021-11-15 stsp free(worktree_path);
293 7d69d862 2021-11-15 stsp worktree_path = parent_path;
296 7d69d862 2021-11-15 stsp free(worktree_path);
297 7d69d862 2021-11-15 stsp return got_error(GOT_ERR_NOT_WORKTREE);
300 7d69d862 2021-11-15 stsp const struct got_error *
301 7d69d862 2021-11-15 stsp got_worktree_close(struct got_worktree *worktree)
303 7d69d862 2021-11-15 stsp const struct got_error *err = NULL;
305 7d69d862 2021-11-15 stsp if (worktree->lockfd != -1) {
306 7d69d862 2021-11-15 stsp if (close(worktree->lockfd) == -1)
307 7d69d862 2021-11-15 stsp err = got_error_from_errno2("close",
308 7d69d862 2021-11-15 stsp got_worktree_get_root_path(worktree));
310 7d69d862 2021-11-15 stsp if (close(worktree->root_fd) == -1 && err == NULL)
311 7d69d862 2021-11-15 stsp err = got_error_from_errno2("close",
312 7d69d862 2021-11-15 stsp got_worktree_get_root_path(worktree));
313 7d69d862 2021-11-15 stsp free(worktree->repo_path);
314 7d69d862 2021-11-15 stsp free(worktree->path_prefix);
315 7d69d862 2021-11-15 stsp free(worktree->base_commit_id);
316 7d69d862 2021-11-15 stsp free(worktree->head_ref_name);
317 7d69d862 2021-11-15 stsp free(worktree->root_path);
318 7d69d862 2021-11-15 stsp free(worktree->gotconfig_path);
319 7d69d862 2021-11-15 stsp got_gotconfig_free(worktree->gotconfig);
320 7d69d862 2021-11-15 stsp free(worktree);
321 7d69d862 2021-11-15 stsp return err;
324 7d69d862 2021-11-15 stsp const char *
325 7d69d862 2021-11-15 stsp got_worktree_get_root_path(struct got_worktree *worktree)
327 7d69d862 2021-11-15 stsp return worktree->root_path;
330 7d69d862 2021-11-15 stsp const char *
331 7d69d862 2021-11-15 stsp got_worktree_get_repo_path(struct got_worktree *worktree)
333 7d69d862 2021-11-15 stsp return worktree->repo_path;
336 7d69d862 2021-11-15 stsp const char *
337 7d69d862 2021-11-15 stsp got_worktree_get_path_prefix(struct got_worktree *worktree)
339 7d69d862 2021-11-15 stsp return worktree->path_prefix;