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Commit | Line | Data |
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12dccc16 | 1 | #include "cache.h" |
8e440259 | 2 | #include "blob.h" |
8ca12c0d | 3 | #include "dir.h" |
dd8e9121 | 4 | #include "streaming.h" |
6d14eac3 | 5 | #include "submodule.h" |
52f1d62e | 6 | #include "progress.h" |
883e248b | 7 | #include "fsmonitor.h" |
12dccc16 | 8 | |
81a9aa60 KB |
9 | static void create_directories(const char *path, int path_len, |
10 | const struct checkout *state) | |
12dccc16 | 11 | { |
3733e694 | 12 | char *buf = xmallocz(path_len); |
81a9aa60 KB |
13 | int len = 0; |
14 | ||
15 | while (len < path_len) { | |
16 | do { | |
17 | buf[len] = path[len]; | |
18 | len++; | |
19 | } while (len < path_len && path[len] != '/'); | |
20 | if (len >= path_len) | |
21 | break; | |
12dccc16 | 22 | buf[len] = 0; |
fa2e71c9 | 23 | |
bad4a54f KB |
24 | /* |
25 | * For 'checkout-index --prefix=<dir>', <dir> is | |
26 | * allowed to be a symlink to an existing directory, | |
27 | * and we set 'state->base_dir_len' below, such that | |
28 | * we test the path components of the prefix with the | |
29 | * stat() function instead of the lstat() function. | |
30 | */ | |
57199892 | 31 | if (has_dirs_only_path(buf, len, state->base_dir_len)) |
fa2e71c9 JH |
32 | continue; /* ok, it is already a directory. */ |
33 | ||
34 | /* | |
bad4a54f KB |
35 | * If this mkdir() would fail, it could be that there |
36 | * is already a symlink or something else exists | |
37 | * there, therefore we then try to unlink it and try | |
38 | * one more time to create the directory. | |
fa2e71c9 | 39 | */ |
f312de01 | 40 | if (mkdir(buf, 0777)) { |
fa2e71c9 | 41 | if (errno == EEXIST && state->force && |
691f1a28 | 42 | !unlink_or_warn(buf) && !mkdir(buf, 0777)) |
fa2e71c9 | 43 | continue; |
0721c314 | 44 | die_errno("cannot create directory at '%s'", buf); |
12dccc16 LT |
45 | } |
46 | } | |
47 | free(buf); | |
48 | } | |
49 | ||
2f29e0c6 | 50 | static void remove_subtree(struct strbuf *path) |
12dccc16 | 51 | { |
2f29e0c6 | 52 | DIR *dir = opendir(path->buf); |
12dccc16 | 53 | struct dirent *de; |
2f29e0c6 | 54 | int origlen = path->len; |
a6080a0a | 55 | |
12dccc16 | 56 | if (!dir) |
2f29e0c6 | 57 | die_errno("cannot opendir '%s'", path->buf); |
12dccc16 LT |
58 | while ((de = readdir(dir)) != NULL) { |
59 | struct stat st; | |
2f29e0c6 | 60 | |
8ca12c0d | 61 | if (is_dot_or_dotdot(de->d_name)) |
12dccc16 | 62 | continue; |
2f29e0c6 MH |
63 | |
64 | strbuf_addch(path, '/'); | |
65 | strbuf_addstr(path, de->d_name); | |
66 | if (lstat(path->buf, &st)) | |
67 | die_errno("cannot lstat '%s'", path->buf); | |
12dccc16 | 68 | if (S_ISDIR(st.st_mode)) |
2f29e0c6 MH |
69 | remove_subtree(path); |
70 | else if (unlink(path->buf)) | |
71 | die_errno("cannot unlink '%s'", path->buf); | |
72 | strbuf_setlen(path, origlen); | |
12dccc16 LT |
73 | } |
74 | closedir(dir); | |
2f29e0c6 MH |
75 | if (rmdir(path->buf)) |
76 | die_errno("cannot rmdir '%s'", path->buf); | |
12dccc16 LT |
77 | } |
78 | ||
d48a72f3 | 79 | static int create_file(const char *path, unsigned int mode) |
12dccc16 | 80 | { |
12dccc16 | 81 | mode = (mode & 0100) ? 0777 : 0666; |
781411ed | 82 | return open(path, O_WRONLY | O_CREAT | O_EXCL, mode); |
12dccc16 LT |
83 | } |
84 | ||
9c5e6c80 | 85 | static void *read_blob_entry(const struct cache_entry *ce, unsigned long *size) |
f0807e62 LT |
86 | { |
87 | enum object_type type; | |
b4f5aca4 | 88 | void *blob_data = read_object_file(&ce->oid, &type, size); |
f0807e62 | 89 | |
d8f71807 | 90 | if (blob_data) { |
f0807e62 | 91 | if (type == OBJ_BLOB) |
d8f71807 BW |
92 | return blob_data; |
93 | free(blob_data); | |
f0807e62 LT |
94 | } |
95 | return NULL; | |
96 | } | |
97 | ||
9c5e6c80 | 98 | static int open_output_fd(char *path, const struct cache_entry *ce, int to_tempfile) |
fd5db55d JH |
99 | { |
100 | int symlink = (ce->ce_mode & S_IFMT) != S_IFREG; | |
101 | if (to_tempfile) { | |
330c8e26 JK |
102 | xsnprintf(path, TEMPORARY_FILENAME_LENGTH, "%s", |
103 | symlink ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX"); | |
fd5db55d JH |
104 | return mkstemp(path); |
105 | } else { | |
106 | return create_file(path, !symlink ? ce->ce_mode : 0666); | |
107 | } | |
108 | } | |
109 | ||
110 | static int fstat_output(int fd, const struct checkout *state, struct stat *st) | |
111 | { | |
112 | /* use fstat() only when path == ce->name */ | |
113 | if (fstat_is_reliable() && | |
114 | state->refresh_cache && !state->base_dir_len) { | |
115 | fstat(fd, st); | |
116 | return 1; | |
117 | } | |
118 | return 0; | |
119 | } | |
120 | ||
9c5e6c80 | 121 | static int streaming_write_entry(const struct cache_entry *ce, char *path, |
b6691092 | 122 | struct stream_filter *filter, |
dd8e9121 JH |
123 | const struct checkout *state, int to_tempfile, |
124 | int *fstat_done, struct stat *statbuf) | |
125 | { | |
d9c31e14 | 126 | int result = 0; |
47a02ff2 | 127 | int fd; |
dd8e9121 JH |
128 | |
129 | fd = open_output_fd(path, ce, to_tempfile); | |
d9c31e14 JK |
130 | if (fd < 0) |
131 | return -1; | |
132 | ||
7eda0e4f | 133 | result |= stream_blob_to_fd(fd, &ce->oid, filter, 1); |
d9c31e14 JK |
134 | *fstat_done = fstat_output(fd, state, statbuf); |
135 | result |= close(fd); | |
136 | ||
137 | if (result) | |
dd8e9121 JH |
138 | unlink(path); |
139 | return result; | |
140 | } | |
141 | ||
2841e8f8 LS |
142 | void enable_delayed_checkout(struct checkout *state) |
143 | { | |
144 | if (!state->delayed_checkout) { | |
145 | state->delayed_checkout = xmalloc(sizeof(*state->delayed_checkout)); | |
146 | state->delayed_checkout->state = CE_CAN_DELAY; | |
147 | string_list_init(&state->delayed_checkout->filters, 0); | |
148 | string_list_init(&state->delayed_checkout->paths, 0); | |
149 | } | |
150 | } | |
151 | ||
152 | static int remove_available_paths(struct string_list_item *item, void *cb_data) | |
153 | { | |
154 | struct string_list *available_paths = cb_data; | |
155 | struct string_list_item *available; | |
156 | ||
157 | available = string_list_lookup(available_paths, item->string); | |
158 | if (available) | |
159 | available->util = (void *)item->string; | |
160 | return !available; | |
161 | } | |
162 | ||
163 | int finish_delayed_checkout(struct checkout *state) | |
164 | { | |
165 | int errs = 0; | |
52f1d62e LS |
166 | unsigned delayed_object_count; |
167 | off_t filtered_bytes = 0; | |
2841e8f8 | 168 | struct string_list_item *filter, *path; |
52f1d62e | 169 | struct progress *progress; |
2841e8f8 LS |
170 | struct delayed_checkout *dco = state->delayed_checkout; |
171 | ||
172 | if (!state->delayed_checkout) | |
173 | return errs; | |
174 | ||
175 | dco->state = CE_RETRY; | |
52f1d62e | 176 | delayed_object_count = dco->paths.nr; |
7fbbd3ec | 177 | progress = start_delayed_progress(_("Filtering content"), delayed_object_count); |
2841e8f8 LS |
178 | while (dco->filters.nr > 0) { |
179 | for_each_string_list_item(filter, &dco->filters) { | |
180 | struct string_list available_paths = STRING_LIST_INIT_NODUP; | |
52f1d62e | 181 | display_progress(progress, delayed_object_count - dco->paths.nr); |
2841e8f8 LS |
182 | |
183 | if (!async_query_available_blobs(filter->string, &available_paths)) { | |
184 | /* Filter reported an error */ | |
185 | errs = 1; | |
186 | filter->string = ""; | |
187 | continue; | |
188 | } | |
189 | if (available_paths.nr <= 0) { | |
190 | /* | |
191 | * Filter responded with no entries. That means | |
192 | * the filter is done and we can remove the | |
193 | * filter from the list (see | |
194 | * "string_list_remove_empty_items" call below). | |
195 | */ | |
196 | filter->string = ""; | |
197 | continue; | |
198 | } | |
199 | ||
200 | /* | |
201 | * In dco->paths we store a list of all delayed paths. | |
202 | * The filter just send us a list of available paths. | |
203 | * Remove them from the list. | |
204 | */ | |
205 | filter_string_list(&dco->paths, 0, | |
206 | &remove_available_paths, &available_paths); | |
207 | ||
208 | for_each_string_list_item(path, &available_paths) { | |
209 | struct cache_entry* ce; | |
210 | ||
211 | if (!path->util) { | |
212 | error("external filter '%s' signaled that '%s' " | |
213 | "is now available although it has not been " | |
214 | "delayed earlier", | |
215 | filter->string, path->string); | |
216 | errs |= 1; | |
217 | ||
218 | /* | |
219 | * Do not ask the filter for available blobs, | |
220 | * again, as the filter is likely buggy. | |
221 | */ | |
222 | filter->string = ""; | |
223 | continue; | |
224 | } | |
225 | ce = index_file_exists(state->istate, path->string, | |
226 | strlen(path->string), 0); | |
52f1d62e LS |
227 | if (ce) { |
228 | errs |= checkout_entry(ce, state, NULL); | |
229 | filtered_bytes += ce->ce_stat_data.sd_size; | |
230 | display_throughput(progress, filtered_bytes); | |
231 | } else | |
232 | errs = 1; | |
2841e8f8 LS |
233 | } |
234 | } | |
235 | string_list_remove_empty_items(&dco->filters, 0); | |
236 | } | |
52f1d62e | 237 | stop_progress(&progress); |
2841e8f8 LS |
238 | string_list_clear(&dco->filters, 0); |
239 | ||
240 | /* At this point we should not have any delayed paths anymore. */ | |
241 | errs |= dco->paths.nr; | |
242 | for_each_string_list_item(path, &dco->paths) { | |
243 | error("'%s' was not filtered properly", path->string); | |
244 | } | |
245 | string_list_clear(&dco->paths, 0); | |
246 | ||
247 | free(dco); | |
248 | state->delayed_checkout = NULL; | |
249 | ||
250 | return errs; | |
251 | } | |
252 | ||
9c5e6c80 NTND |
253 | static int write_entry(struct cache_entry *ce, |
254 | char *path, const struct checkout *state, int to_tempfile) | |
12dccc16 | 255 | { |
4857c761 | 256 | unsigned int ce_mode_s_ifmt = ce->ce_mode & S_IFMT; |
c602d3a9 | 257 | struct delayed_checkout *dco = state->delayed_checkout; |
e4c72923 | 258 | int fd, ret, fstat_done = 0; |
d8f71807 | 259 | char *new_blob; |
4857c761 KB |
260 | struct strbuf buf = STRBUF_INIT; |
261 | unsigned long size; | |
564bde9a JK |
262 | ssize_t wrote; |
263 | size_t newsize = 0; | |
e4c72923 | 264 | struct stat st; |
6d14eac3 | 265 | const struct submodule *sub; |
4857c761 | 266 | |
b6691092 | 267 | if (ce_mode_s_ifmt == S_IFREG) { |
99d1a986 | 268 | struct stream_filter *filter = get_stream_filter(ce->name, |
1a750441 | 269 | &ce->oid); |
b6691092 JH |
270 | if (filter && |
271 | !streaming_write_entry(ce, path, filter, | |
272 | state, to_tempfile, | |
273 | &fstat_done, &st)) | |
274 | goto finish; | |
275 | } | |
dd8e9121 | 276 | |
4857c761 | 277 | switch (ce_mode_s_ifmt) { |
4857c761 | 278 | case S_IFLNK: |
d8f71807 BW |
279 | new_blob = read_blob_entry(ce, &size); |
280 | if (!new_blob) | |
d43e9073 | 281 | return error("unable to read sha1 file of %s (%s)", |
7cbbf9d6 | 282 | path, oid_to_hex(&ce->oid)); |
1a9d7e9b | 283 | |
7cbbf9d6 JK |
284 | /* |
285 | * We can't make a real symlink; write out a regular file entry | |
286 | * with the symlink destination as its contents. | |
287 | */ | |
288 | if (!has_symlinks || to_tempfile) | |
289 | goto write_file_entry; | |
290 | ||
d8f71807 BW |
291 | ret = symlink(new_blob, path); |
292 | free(new_blob); | |
7cbbf9d6 JK |
293 | if (ret) |
294 | return error_errno("unable to create symlink %s", path); | |
295 | break; | |
296 | ||
297 | case S_IFREG: | |
c602d3a9 JK |
298 | /* |
299 | * We do not send the blob in case of a retry, so do not | |
300 | * bother reading it at all. | |
301 | */ | |
7cbbf9d6 | 302 | if (dco && dco->state == CE_RETRY) { |
d8f71807 | 303 | new_blob = NULL; |
c602d3a9 JK |
304 | size = 0; |
305 | } else { | |
d8f71807 BW |
306 | new_blob = read_blob_entry(ce, &size); |
307 | if (!new_blob) | |
c602d3a9 JK |
308 | return error("unable to read sha1 file of %s (%s)", |
309 | path, oid_to_hex(&ce->oid)); | |
4857c761 KB |
310 | } |
311 | ||
1a9d7e9b JH |
312 | /* |
313 | * Convert from git internal format to working tree format | |
314 | */ | |
7cbbf9d6 | 315 | if (dco && dco->state != CE_NO_DELAY) { |
d8f71807 | 316 | ret = async_convert_to_working_tree(ce->name, new_blob, |
7cbbf9d6 JK |
317 | size, &buf, dco); |
318 | if (ret && string_list_has_string(&dco->paths, ce->name)) { | |
d8f71807 | 319 | free(new_blob); |
7cbbf9d6 | 320 | goto delayed; |
2841e8f8 | 321 | } |
7cbbf9d6 | 322 | } else |
d8f71807 | 323 | ret = convert_to_working_tree(ce->name, new_blob, size, &buf); |
7cbbf9d6 JK |
324 | |
325 | if (ret) { | |
d8f71807 BW |
326 | free(new_blob); |
327 | new_blob = strbuf_detach(&buf, &newsize); | |
7cbbf9d6 | 328 | size = newsize; |
1a9d7e9b | 329 | } |
7cbbf9d6 JK |
330 | /* |
331 | * No "else" here as errors from convert are OK at this | |
332 | * point. If the error would have been fatal (e.g. | |
333 | * filter is required), then we would have died already. | |
334 | */ | |
1a9d7e9b | 335 | |
7cbbf9d6 | 336 | write_file_entry: |
fd5db55d | 337 | fd = open_output_fd(path, ce, to_tempfile); |
12dccc16 | 338 | if (fd < 0) { |
d8f71807 | 339 | free(new_blob); |
e1ebb3c2 | 340 | return error_errno("unable to create file %s", path); |
12dccc16 | 341 | } |
6c510bee | 342 | |
d8f71807 | 343 | wrote = write_in_full(fd, new_blob, size); |
fd5db55d JH |
344 | if (!to_tempfile) |
345 | fstat_done = fstat_output(fd, state, &st); | |
12dccc16 | 346 | close(fd); |
d8f71807 | 347 | free(new_blob); |
564bde9a | 348 | if (wrote < 0) |
d43e9073 | 349 | return error("unable to write file %s", path); |
12dccc16 | 350 | break; |
7cbbf9d6 | 351 | |
302b9282 | 352 | case S_IFGITLINK: |
f0807e62 | 353 | if (to_tempfile) |
42063f95 | 354 | return error("cannot create temporary submodule %s", path); |
f0807e62 | 355 | if (mkdir(path, 0777) < 0) |
42063f95 | 356 | return error("cannot create submodule directory %s", path); |
6d14eac3 SB |
357 | sub = submodule_from_ce(ce); |
358 | if (sub) | |
359 | return submodule_move_head(ce->name, | |
cd279e2e SB |
360 | NULL, oid_to_hex(&ce->oid), |
361 | state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0); | |
f0807e62 | 362 | break; |
7cbbf9d6 | 363 | |
12dccc16 | 364 | default: |
d43e9073 | 365 | return error("unknown file mode for %s in index", path); |
12dccc16 LT |
366 | } |
367 | ||
dd8e9121 | 368 | finish: |
6ee67f26 | 369 | if (state->refresh_cache) { |
d4a2024a | 370 | assert(state->istate); |
e4c72923 | 371 | if (!fstat_done) |
11179eb3 LS |
372 | if (lstat(ce->name, &st) < 0) |
373 | return error_errno("unable to stat just-written file %s", | |
374 | ce->name); | |
12dccc16 | 375 | fill_stat_cache_info(ce, &st); |
078a58e8 | 376 | ce->ce_flags |= CE_UPDATE_IN_BASE; |
883e248b | 377 | mark_fsmonitor_invalid(state->istate, ce); |
d4a2024a | 378 | state->istate->cache_changed |= CE_ENTRY_CHANGED; |
12dccc16 | 379 | } |
03b95333 | 380 | delayed: |
12dccc16 LT |
381 | return 0; |
382 | } | |
383 | ||
b6986d8a LT |
384 | /* |
385 | * This is like 'lstat()', except it refuses to follow symlinks | |
da02ca50 | 386 | * in the path, after skipping "skiplen". |
b6986d8a | 387 | */ |
61b97df7 | 388 | static int check_path(const char *path, int len, struct stat *st, int skiplen) |
b6986d8a | 389 | { |
da02ca50 JH |
390 | const char *slash = path + len; |
391 | ||
392 | while (path < slash && *slash != '/') | |
393 | slash--; | |
394 | if (!has_dirs_only_path(path, slash - path, skiplen)) { | |
b6986d8a LT |
395 | errno = ENOENT; |
396 | return -1; | |
397 | } | |
398 | return lstat(path, st); | |
399 | } | |
400 | ||
af2a651d JH |
401 | /* |
402 | * Write the contents from ce out to the working tree. | |
403 | * | |
404 | * When topath[] is not NULL, instead of writing to the working tree | |
405 | * file named by ce, a temporary file is created by this function and | |
406 | * its name is returned in topath[], which must be able to hold at | |
407 | * least TEMPORARY_FILENAME_LENGTH bytes long. | |
408 | */ | |
9c5e6c80 NTND |
409 | int checkout_entry(struct cache_entry *ce, |
410 | const struct checkout *state, char *topath) | |
12dccc16 | 411 | { |
f63272a3 | 412 | static struct strbuf path = STRBUF_INIT; |
de84f99c | 413 | struct stat st; |
12dccc16 | 414 | |
de84f99c SP |
415 | if (topath) |
416 | return write_entry(ce, topath, state, 1); | |
417 | ||
f63272a3 MH |
418 | strbuf_reset(&path); |
419 | strbuf_add(&path, state->base_dir, state->base_dir_len); | |
420 | strbuf_add(&path, ce->name, ce_namelen(ce)); | |
12dccc16 | 421 | |
f63272a3 | 422 | if (!check_path(path.buf, path.len, &st, state->base_dir_len)) { |
6d14eac3 | 423 | const struct submodule *sub; |
56cac48c | 424 | unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE); |
6d14eac3 SB |
425 | /* |
426 | * Needs to be checked before !changed returns early, | |
427 | * as the possibly empty directory was not changed | |
428 | */ | |
429 | sub = submodule_from_ce(ce); | |
430 | if (sub) { | |
431 | int err; | |
432 | if (!is_submodule_populated_gently(ce->name, &err)) { | |
433 | struct stat sb; | |
434 | if (lstat(ce->name, &sb)) | |
435 | die(_("could not stat file '%s'"), ce->name); | |
436 | if (!(st.st_mode & S_IFDIR)) | |
437 | unlink_or_warn(ce->name); | |
438 | ||
439 | return submodule_move_head(ce->name, | |
cd279e2e | 440 | NULL, oid_to_hex(&ce->oid), 0); |
6d14eac3 SB |
441 | } else |
442 | return submodule_move_head(ce->name, | |
443 | "HEAD", oid_to_hex(&ce->oid), | |
cd279e2e | 444 | state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0); |
6d14eac3 SB |
445 | } |
446 | ||
12dccc16 LT |
447 | if (!changed) |
448 | return 0; | |
449 | if (!state->force) { | |
450 | if (!state->quiet) | |
f63272a3 MH |
451 | fprintf(stderr, |
452 | "%s already exists, no checkout\n", | |
453 | path.buf); | |
4b12dae6 | 454 | return -1; |
12dccc16 LT |
455 | } |
456 | ||
457 | /* | |
458 | * We unlink the old file, to get the new one with the | |
459 | * right permissions (including umask, which is nasty | |
460 | * to emulate by hand - much easier to let the system | |
461 | * just do the right thing) | |
462 | */ | |
d48a72f3 | 463 | if (S_ISDIR(st.st_mode)) { |
f0807e62 | 464 | /* If it is a gitlink, leave it alone! */ |
7a51ed66 | 465 | if (S_ISGITLINK(ce->ce_mode)) |
f0807e62 | 466 | return 0; |
d48a72f3 | 467 | if (!state->force) |
f63272a3 | 468 | return error("%s is a directory", path.buf); |
2f29e0c6 | 469 | remove_subtree(&path); |
f63272a3 | 470 | } else if (unlink(path.buf)) |
e1ebb3c2 | 471 | return error_errno("unable to unlink old '%s'", path.buf); |
de84f99c | 472 | } else if (state->not_new) |
12dccc16 | 473 | return 0; |
f63272a3 MH |
474 | |
475 | create_directories(path.buf, path.len, state); | |
476 | return write_entry(ce, path.buf, state, 0); | |
12dccc16 | 477 | } |