3 #include "object-store.h"
10 #include "parallel-checkout.h"
12 static void create_directories(const char *path, int path_len,
13 const struct checkout *state)
15 char *buf = xmallocz(path_len);
18 while (len < path_len) {
22 } while (len < path_len && path[len] != '/');
28 * For 'checkout-index --prefix=<dir>', <dir> is
29 * allowed to be a symlink to an existing directory,
30 * and we set 'state->base_dir_len' below, such that
31 * we test the path components of the prefix with the
32 * stat() function instead of the lstat() function.
34 if (has_dirs_only_path(buf, len, state->base_dir_len))
35 continue; /* ok, it is already a directory. */
38 * If this mkdir() would fail, it could be that there
39 * is already a symlink or something else exists
40 * there, therefore we then try to unlink it and try
41 * one more time to create the directory.
43 if (mkdir(buf, 0777)) {
44 if (errno == EEXIST && state->force &&
45 !unlink_or_warn(buf) && !mkdir(buf, 0777))
47 die_errno("cannot create directory at '%s'", buf);
53 static void remove_subtree(struct strbuf *path)
55 DIR *dir = opendir(path->buf);
57 int origlen = path->len;
60 die_errno("cannot opendir '%s'", path->buf);
61 while ((de = readdir_skip_dot_and_dotdot(dir)) != NULL) {
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);
68 if (S_ISDIR(st.st_mode))
70 else if (unlink(path->buf))
71 die_errno("cannot unlink '%s'", path->buf);
72 strbuf_setlen(path, origlen);
76 die_errno("cannot rmdir '%s'", path->buf);
79 static int create_file(const char *path, unsigned int mode)
81 mode = (mode & 0100) ? 0777 : 0666;
82 return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
85 void *read_blob_entry(const struct cache_entry *ce, unsigned long *size)
87 enum object_type type;
88 void *blob_data = read_object_file(&ce->oid, &type, size);
98 static int open_output_fd(char *path, const struct cache_entry *ce, int to_tempfile)
100 int symlink = (ce->ce_mode & S_IFMT) != S_IFREG;
102 xsnprintf(path, TEMPORARY_FILENAME_LENGTH, "%s",
103 symlink ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX");
104 return mkstemp(path);
106 return create_file(path, !symlink ? ce->ce_mode : 0666);
110 int fstat_checkout_output(int fd, const struct checkout *state, struct stat *st)
112 /* use fstat() only when path == ce->name */
113 if (fstat_is_reliable() &&
114 state->refresh_cache && !state->base_dir_len) {
115 return !fstat(fd, st);
120 static int streaming_write_entry(const struct cache_entry *ce, char *path,
121 struct stream_filter *filter,
122 const struct checkout *state, int to_tempfile,
123 int *fstat_done, struct stat *statbuf)
128 fd = open_output_fd(path, ce, to_tempfile);
132 result |= stream_blob_to_fd(fd, &ce->oid, filter, 1);
133 *fstat_done = fstat_checkout_output(fd, state, statbuf);
141 void enable_delayed_checkout(struct checkout *state)
143 if (!state->delayed_checkout) {
144 state->delayed_checkout = xmalloc(sizeof(*state->delayed_checkout));
145 state->delayed_checkout->state = CE_CAN_DELAY;
146 string_list_init(&state->delayed_checkout->filters, 0);
147 string_list_init(&state->delayed_checkout->paths, 0);
151 static int remove_available_paths(struct string_list_item *item, void *cb_data)
153 struct string_list *available_paths = cb_data;
154 struct string_list_item *available;
156 available = string_list_lookup(available_paths, item->string);
158 available->util = (void *)item->string;
162 int finish_delayed_checkout(struct checkout *state, int *nr_checkouts)
165 unsigned delayed_object_count;
166 off_t filtered_bytes = 0;
167 struct string_list_item *filter, *path;
168 struct progress *progress;
169 struct delayed_checkout *dco = state->delayed_checkout;
171 if (!state->delayed_checkout)
174 dco->state = CE_RETRY;
175 delayed_object_count = dco->paths.nr;
176 progress = start_delayed_progress(_("Filtering content"), delayed_object_count);
177 while (dco->filters.nr > 0) {
178 for_each_string_list_item(filter, &dco->filters) {
179 struct string_list available_paths = STRING_LIST_INIT_NODUP;
180 display_progress(progress, delayed_object_count - dco->paths.nr);
182 if (!async_query_available_blobs(filter->string, &available_paths)) {
183 /* Filter reported an error */
188 if (available_paths.nr <= 0) {
190 * Filter responded with no entries. That means
191 * the filter is done and we can remove the
192 * filter from the list (see
193 * "string_list_remove_empty_items" call below).
200 * In dco->paths we store a list of all delayed paths.
201 * The filter just send us a list of available paths.
202 * Remove them from the list.
204 filter_string_list(&dco->paths, 0,
205 &remove_available_paths, &available_paths);
207 for_each_string_list_item(path, &available_paths) {
208 struct cache_entry* ce;
211 error("external filter '%s' signaled that '%s' "
212 "is now available although it has not been "
214 filter->string, path->string);
218 * Do not ask the filter for available blobs,
219 * again, as the filter is likely buggy.
224 ce = index_file_exists(state->istate, path->string,
225 strlen(path->string), 0);
227 errs |= checkout_entry(ce, state, NULL, nr_checkouts);
228 filtered_bytes += ce->ce_stat_data.sd_size;
229 display_throughput(progress, filtered_bytes);
234 string_list_remove_empty_items(&dco->filters, 0);
236 stop_progress(&progress);
237 string_list_clear(&dco->filters, 0);
239 /* At this point we should not have any delayed paths anymore. */
240 errs |= dco->paths.nr;
241 for_each_string_list_item(path, &dco->paths) {
242 error("'%s' was not filtered properly", path->string);
244 string_list_clear(&dco->paths, 0);
247 state->delayed_checkout = NULL;
252 void update_ce_after_write(const struct checkout *state, struct cache_entry *ce,
255 if (state->refresh_cache) {
256 assert(state->istate);
257 fill_stat_cache_info(state->istate, ce, st);
258 ce->ce_flags |= CE_UPDATE_IN_BASE;
259 mark_fsmonitor_invalid(state->istate, ce);
260 state->istate->cache_changed |= CE_ENTRY_CHANGED;
264 /* Note: ca is used (and required) iff the entry refers to a regular file. */
265 static int write_entry(struct cache_entry *ce, char *path, struct conv_attrs *ca,
266 const struct checkout *state, int to_tempfile)
268 unsigned int ce_mode_s_ifmt = ce->ce_mode & S_IFMT;
269 struct delayed_checkout *dco = state->delayed_checkout;
270 int fd, ret, fstat_done = 0;
272 struct strbuf buf = STRBUF_INIT;
277 const struct submodule *sub;
278 struct checkout_metadata meta;
280 clone_checkout_metadata(&meta, &state->meta, &ce->oid);
282 if (ce_mode_s_ifmt == S_IFREG) {
283 struct stream_filter *filter = get_stream_filter_ca(ca, &ce->oid);
285 !streaming_write_entry(ce, path, filter,
291 switch (ce_mode_s_ifmt) {
293 new_blob = read_blob_entry(ce, &size);
295 return error("unable to read sha1 file of %s (%s)",
296 ce->name, oid_to_hex(&ce->oid));
299 * We can't make a real symlink; write out a regular file entry
300 * with the symlink destination as its contents.
302 if (!has_symlinks || to_tempfile)
303 goto write_file_entry;
305 ret = symlink(new_blob, path);
308 return error_errno("unable to create symlink %s", path);
313 * We do not send the blob in case of a retry, so do not
314 * bother reading it at all.
316 if (dco && dco->state == CE_RETRY) {
320 new_blob = read_blob_entry(ce, &size);
322 return error("unable to read sha1 file of %s (%s)",
323 ce->name, oid_to_hex(&ce->oid));
327 * Convert from git internal format to working tree format
329 if (dco && dco->state != CE_NO_DELAY) {
330 ret = async_convert_to_working_tree_ca(ca, ce->name,
333 if (ret && string_list_has_string(&dco->paths, ce->name)) {
338 ret = convert_to_working_tree_ca(ca, ce->name, new_blob,
344 new_blob = strbuf_detach(&buf, &newsize);
348 * No "else" here as errors from convert are OK at this
349 * point. If the error would have been fatal (e.g.
350 * filter is required), then we would have died already.
354 fd = open_output_fd(path, ce, to_tempfile);
357 return error_errno("unable to create file %s", path);
360 wrote = write_in_full(fd, new_blob, size);
362 fstat_done = fstat_checkout_output(fd, state, &st);
366 return error("unable to write file %s", path);
371 return error("cannot create temporary submodule %s", ce->name);
372 if (mkdir(path, 0777) < 0)
373 return error("cannot create submodule directory %s", path);
374 sub = submodule_from_ce(ce);
376 return submodule_move_head(ce->name,
377 NULL, oid_to_hex(&ce->oid),
378 state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
382 return error("unknown file mode for %s in index", ce->name);
386 if (state->refresh_cache) {
387 if (!fstat_done && lstat(ce->name, &st) < 0)
388 return error_errno("unable to stat just-written file %s",
390 update_ce_after_write(state, ce , &st);
397 * This is like 'lstat()', except it refuses to follow symlinks
398 * in the path, after skipping "skiplen".
400 static int check_path(const char *path, int len, struct stat *st, int skiplen)
402 const char *slash = path + len;
404 while (path < slash && *slash != '/')
406 if (!has_dirs_only_path(path, slash - path, skiplen)) {
410 return lstat(path, st);
413 static void mark_colliding_entries(const struct checkout *state,
414 struct cache_entry *ce, struct stat *st)
416 int i, trust_ino = check_stat;
418 #if defined(GIT_WINDOWS_NATIVE) || defined(__CYGWIN__)
422 ce->ce_flags |= CE_MATCHED;
424 /* TODO: audit for interaction with sparse-index. */
425 ensure_full_index(state->istate);
426 for (i = 0; i < state->istate->cache_nr; i++) {
427 struct cache_entry *dup = state->istate->cache[i];
431 * Parallel checkout doesn't create the files in index
432 * order. So the other side of the collision may appear
433 * after the given cache_entry in the array.
435 if (parallel_checkout_status() == PC_RUNNING)
441 if (dup->ce_flags & (CE_MATCHED | CE_VALID | CE_SKIP_WORKTREE))
444 if ((trust_ino && !match_stat_data(&dup->ce_stat_data, st)) ||
445 (!trust_ino && !fspathcmp(ce->name, dup->name))) {
446 dup->ce_flags |= CE_MATCHED;
452 int checkout_entry_ca(struct cache_entry *ce, struct conv_attrs *ca,
453 const struct checkout *state, char *topath,
456 static struct strbuf path = STRBUF_INIT;
458 struct conv_attrs ca_buf;
460 if (ce->ce_flags & CE_WT_REMOVE) {
463 * No content and thus no path to create, so we have
464 * no pathname to return.
466 BUG("Can't remove entry to a path");
472 if (S_ISREG(ce->ce_mode) && !ca) {
473 convert_attrs(state->istate, &ca_buf, ce->name);
476 return write_entry(ce, topath, ca, state, 1);
480 strbuf_add(&path, state->base_dir, state->base_dir_len);
481 strbuf_add(&path, ce->name, ce_namelen(ce));
483 if (!check_path(path.buf, path.len, &st, state->base_dir_len)) {
484 const struct submodule *sub;
485 unsigned changed = ie_match_stat(state->istate, ce, &st,
486 CE_MATCH_IGNORE_VALID | CE_MATCH_IGNORE_SKIP_WORKTREE);
488 * Needs to be checked before !changed returns early,
489 * as the possibly empty directory was not changed
491 sub = submodule_from_ce(ce);
494 if (!is_submodule_populated_gently(ce->name, &err)) {
496 if (lstat(ce->name, &sb))
497 die(_("could not stat file '%s'"), ce->name);
498 if (!(st.st_mode & S_IFDIR))
499 unlink_or_warn(ce->name);
501 return submodule_move_head(ce->name,
502 NULL, oid_to_hex(&ce->oid), 0);
504 return submodule_move_head(ce->name,
505 "HEAD", oid_to_hex(&ce->oid),
506 state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
514 "%s already exists, no checkout\n",
520 mark_colliding_entries(state, ce, &st);
523 * We unlink the old file, to get the new one with the
524 * right permissions (including umask, which is nasty
525 * to emulate by hand - much easier to let the system
526 * just do the right thing)
528 if (S_ISDIR(st.st_mode)) {
529 /* If it is a gitlink, leave it alone! */
530 if (S_ISGITLINK(ce->ce_mode))
532 remove_subtree(&path);
533 } else if (unlink(path.buf))
534 return error_errno("unable to unlink old '%s'", path.buf);
535 } else if (state->not_new)
538 create_directories(path.buf, path.len, state);
543 if (S_ISREG(ce->ce_mode) && !ca) {
544 convert_attrs(state->istate, &ca_buf, ce->name);
548 if (!enqueue_checkout(ce, ca))
551 return write_entry(ce, path.buf, ca, state, 0);
554 void unlink_entry(const struct cache_entry *ce)
556 const struct submodule *sub = submodule_from_ce(ce);
558 /* state.force is set at the caller. */
559 submodule_move_head(ce->name, "HEAD", NULL,
560 SUBMODULE_MOVE_HEAD_FORCE);
562 if (check_leading_path(ce->name, ce_namelen(ce), 1) >= 0)
564 if (remove_or_warn(ce->ce_mode, ce->name))
566 schedule_dir_for_removal(ce->name, ce_namelen(ce));