3 #include "object-store.h"
11 static void create_directories(const char *path, int path_len,
12 const struct checkout *state)
14 char *buf = xmallocz(path_len);
17 while (len < path_len) {
21 } while (len < path_len && path[len] != '/');
27 * For 'checkout-index --prefix=<dir>', <dir> is
28 * allowed to be a symlink to an existing directory,
29 * and we set 'state->base_dir_len' below, such that
30 * we test the path components of the prefix with the
31 * stat() function instead of the lstat() function.
33 if (has_dirs_only_path(buf, len, state->base_dir_len))
34 continue; /* ok, it is already a directory. */
37 * If this mkdir() would fail, it could be that there
38 * is already a symlink or something else exists
39 * there, therefore we then try to unlink it and try
40 * one more time to create the directory.
42 if (mkdir(buf, 0777)) {
43 if (errno == EEXIST && state->force &&
44 !unlink_or_warn(buf) && !mkdir(buf, 0777))
46 die_errno("cannot create directory at '%s'", buf);
52 static void remove_subtree(struct strbuf *path)
54 DIR *dir = opendir(path->buf);
56 int origlen = path->len;
59 die_errno("cannot opendir '%s'", path->buf);
60 while ((de = readdir(dir)) != NULL) {
63 if (is_dot_or_dotdot(de->d_name))
66 strbuf_addch(path, '/');
67 strbuf_addstr(path, de->d_name);
68 if (lstat(path->buf, &st))
69 die_errno("cannot lstat '%s'", path->buf);
70 if (S_ISDIR(st.st_mode))
72 else if (unlink(path->buf))
73 die_errno("cannot unlink '%s'", path->buf);
74 strbuf_setlen(path, origlen);
78 die_errno("cannot rmdir '%s'", path->buf);
81 static int create_file(const char *path, unsigned int mode)
83 mode = (mode & 0100) ? 0777 : 0666;
84 return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
87 void *read_blob_entry(const struct cache_entry *ce, unsigned long *size)
89 enum object_type type;
90 void *blob_data = read_object_file(&ce->oid, &type, size);
100 static int open_output_fd(char *path, const struct cache_entry *ce, int to_tempfile)
102 int symlink = (ce->ce_mode & S_IFMT) != S_IFREG;
104 xsnprintf(path, TEMPORARY_FILENAME_LENGTH, "%s",
105 symlink ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX");
106 return mkstemp(path);
108 return create_file(path, !symlink ? ce->ce_mode : 0666);
112 int fstat_checkout_output(int fd, const struct checkout *state, struct stat *st)
114 /* use fstat() only when path == ce->name */
115 if (fstat_is_reliable() &&
116 state->refresh_cache && !state->base_dir_len) {
117 return !fstat(fd, st);
122 static int streaming_write_entry(const struct cache_entry *ce, char *path,
123 struct stream_filter *filter,
124 const struct checkout *state, int to_tempfile,
125 int *fstat_done, struct stat *statbuf)
130 fd = open_output_fd(path, ce, to_tempfile);
134 result |= stream_blob_to_fd(fd, &ce->oid, filter, 1);
135 *fstat_done = fstat_checkout_output(fd, state, statbuf);
143 void enable_delayed_checkout(struct checkout *state)
145 if (!state->delayed_checkout) {
146 state->delayed_checkout = xmalloc(sizeof(*state->delayed_checkout));
147 state->delayed_checkout->state = CE_CAN_DELAY;
148 string_list_init(&state->delayed_checkout->filters, 0);
149 string_list_init(&state->delayed_checkout->paths, 0);
153 static int remove_available_paths(struct string_list_item *item, void *cb_data)
155 struct string_list *available_paths = cb_data;
156 struct string_list_item *available;
158 available = string_list_lookup(available_paths, item->string);
160 available->util = (void *)item->string;
164 int finish_delayed_checkout(struct checkout *state, int *nr_checkouts)
167 unsigned delayed_object_count;
168 off_t filtered_bytes = 0;
169 struct string_list_item *filter, *path;
170 struct progress *progress;
171 struct delayed_checkout *dco = state->delayed_checkout;
173 if (!state->delayed_checkout)
176 dco->state = CE_RETRY;
177 delayed_object_count = dco->paths.nr;
178 progress = start_delayed_progress(_("Filtering content"), delayed_object_count);
179 while (dco->filters.nr > 0) {
180 for_each_string_list_item(filter, &dco->filters) {
181 struct string_list available_paths = STRING_LIST_INIT_NODUP;
182 display_progress(progress, delayed_object_count - dco->paths.nr);
184 if (!async_query_available_blobs(filter->string, &available_paths)) {
185 /* Filter reported an error */
190 if (available_paths.nr <= 0) {
192 * Filter responded with no entries. That means
193 * the filter is done and we can remove the
194 * filter from the list (see
195 * "string_list_remove_empty_items" call below).
202 * In dco->paths we store a list of all delayed paths.
203 * The filter just send us a list of available paths.
204 * Remove them from the list.
206 filter_string_list(&dco->paths, 0,
207 &remove_available_paths, &available_paths);
209 for_each_string_list_item(path, &available_paths) {
210 struct cache_entry* ce;
213 error("external filter '%s' signaled that '%s' "
214 "is now available although it has not been "
216 filter->string, path->string);
220 * Do not ask the filter for available blobs,
221 * again, as the filter is likely buggy.
226 ce = index_file_exists(state->istate, path->string,
227 strlen(path->string), 0);
229 errs |= checkout_entry(ce, state, NULL, nr_checkouts);
230 filtered_bytes += ce->ce_stat_data.sd_size;
231 display_throughput(progress, filtered_bytes);
236 string_list_remove_empty_items(&dco->filters, 0);
238 stop_progress(&progress);
239 string_list_clear(&dco->filters, 0);
241 /* At this point we should not have any delayed paths anymore. */
242 errs |= dco->paths.nr;
243 for_each_string_list_item(path, &dco->paths) {
244 error("'%s' was not filtered properly", path->string);
246 string_list_clear(&dco->paths, 0);
249 state->delayed_checkout = NULL;
254 void update_ce_after_write(const struct checkout *state, struct cache_entry *ce,
257 if (state->refresh_cache) {
258 assert(state->istate);
259 fill_stat_cache_info(state->istate, ce, st);
260 ce->ce_flags |= CE_UPDATE_IN_BASE;
261 mark_fsmonitor_invalid(state->istate, ce);
262 state->istate->cache_changed |= CE_ENTRY_CHANGED;
266 /* Note: ca is used (and required) iff the entry refers to a regular file. */
267 static int write_entry(struct cache_entry *ce, char *path, struct conv_attrs *ca,
268 const struct checkout *state, int to_tempfile)
270 unsigned int ce_mode_s_ifmt = ce->ce_mode & S_IFMT;
271 struct delayed_checkout *dco = state->delayed_checkout;
272 int fd, ret, fstat_done = 0;
274 struct strbuf buf = STRBUF_INIT;
279 const struct submodule *sub;
280 struct checkout_metadata meta;
282 clone_checkout_metadata(&meta, &state->meta, &ce->oid);
284 if (ce_mode_s_ifmt == S_IFREG) {
285 struct stream_filter *filter = get_stream_filter_ca(ca, &ce->oid);
287 !streaming_write_entry(ce, path, filter,
293 switch (ce_mode_s_ifmt) {
295 new_blob = read_blob_entry(ce, &size);
297 return error("unable to read sha1 file of %s (%s)",
298 ce->name, oid_to_hex(&ce->oid));
301 * We can't make a real symlink; write out a regular file entry
302 * with the symlink destination as its contents.
304 if (!has_symlinks || to_tempfile)
305 goto write_file_entry;
307 ret = symlink(new_blob, path);
310 return error_errno("unable to create symlink %s", path);
315 * We do not send the blob in case of a retry, so do not
316 * bother reading it at all.
318 if (dco && dco->state == CE_RETRY) {
322 new_blob = read_blob_entry(ce, &size);
324 return error("unable to read sha1 file of %s (%s)",
325 ce->name, oid_to_hex(&ce->oid));
329 * Convert from git internal format to working tree format
331 if (dco && dco->state != CE_NO_DELAY) {
332 ret = async_convert_to_working_tree_ca(ca, ce->name,
335 if (ret && string_list_has_string(&dco->paths, ce->name)) {
340 ret = convert_to_working_tree_ca(ca, ce->name, new_blob,
346 new_blob = strbuf_detach(&buf, &newsize);
350 * No "else" here as errors from convert are OK at this
351 * point. If the error would have been fatal (e.g.
352 * filter is required), then we would have died already.
356 fd = open_output_fd(path, ce, to_tempfile);
359 return error_errno("unable to create file %s", path);
362 wrote = write_in_full(fd, new_blob, size);
364 fstat_done = fstat_checkout_output(fd, state, &st);
368 return error("unable to write file %s", path);
373 return error("cannot create temporary submodule %s", ce->name);
374 if (mkdir(path, 0777) < 0)
375 return error("cannot create submodule directory %s", path);
376 sub = submodule_from_ce(ce);
378 return submodule_move_head(ce->name,
379 NULL, oid_to_hex(&ce->oid),
380 state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
384 return error("unknown file mode for %s in index", ce->name);
388 if (state->refresh_cache) {
389 if (!fstat_done && lstat(ce->name, &st) < 0)
390 return error_errno("unable to stat just-written file %s",
392 update_ce_after_write(state, ce , &st);
399 * This is like 'lstat()', except it refuses to follow symlinks
400 * in the path, after skipping "skiplen".
402 static int check_path(const char *path, int len, struct stat *st, int skiplen)
404 const char *slash = path + len;
406 while (path < slash && *slash != '/')
408 if (!has_dirs_only_path(path, slash - path, skiplen)) {
412 return lstat(path, st);
415 static void mark_colliding_entries(const struct checkout *state,
416 struct cache_entry *ce, struct stat *st)
418 int i, trust_ino = check_stat;
420 #if defined(GIT_WINDOWS_NATIVE) || defined(__CYGWIN__)
424 ce->ce_flags |= CE_MATCHED;
426 for (i = 0; i < state->istate->cache_nr; i++) {
427 struct cache_entry *dup = state->istate->cache[i];
432 if (dup->ce_flags & (CE_MATCHED | CE_VALID | CE_SKIP_WORKTREE))
435 if ((trust_ino && !match_stat_data(&dup->ce_stat_data, st)) ||
436 (!trust_ino && !fspathcmp(ce->name, dup->name))) {
437 dup->ce_flags |= CE_MATCHED;
443 int checkout_entry_ca(struct cache_entry *ce, struct conv_attrs *ca,
444 const struct checkout *state, char *topath,
447 static struct strbuf path = STRBUF_INIT;
449 struct conv_attrs ca_buf;
451 if (ce->ce_flags & CE_WT_REMOVE) {
454 * No content and thus no path to create, so we have
455 * no pathname to return.
457 BUG("Can't remove entry to a path");
463 if (S_ISREG(ce->ce_mode) && !ca) {
464 convert_attrs(state->istate, &ca_buf, ce->name);
467 return write_entry(ce, topath, ca, state, 1);
471 strbuf_add(&path, state->base_dir, state->base_dir_len);
472 strbuf_add(&path, ce->name, ce_namelen(ce));
474 if (!check_path(path.buf, path.len, &st, state->base_dir_len)) {
475 const struct submodule *sub;
476 unsigned changed = ie_match_stat(state->istate, ce, &st,
477 CE_MATCH_IGNORE_VALID | CE_MATCH_IGNORE_SKIP_WORKTREE);
479 * Needs to be checked before !changed returns early,
480 * as the possibly empty directory was not changed
482 sub = submodule_from_ce(ce);
485 if (!is_submodule_populated_gently(ce->name, &err)) {
487 if (lstat(ce->name, &sb))
488 die(_("could not stat file '%s'"), ce->name);
489 if (!(st.st_mode & S_IFDIR))
490 unlink_or_warn(ce->name);
492 return submodule_move_head(ce->name,
493 NULL, oid_to_hex(&ce->oid), 0);
495 return submodule_move_head(ce->name,
496 "HEAD", oid_to_hex(&ce->oid),
497 state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
505 "%s already exists, no checkout\n",
511 mark_colliding_entries(state, ce, &st);
514 * We unlink the old file, to get the new one with the
515 * right permissions (including umask, which is nasty
516 * to emulate by hand - much easier to let the system
517 * just do the right thing)
519 if (S_ISDIR(st.st_mode)) {
520 /* If it is a gitlink, leave it alone! */
521 if (S_ISGITLINK(ce->ce_mode))
523 remove_subtree(&path);
524 } else if (unlink(path.buf))
525 return error_errno("unable to unlink old '%s'", path.buf);
526 } else if (state->not_new)
529 create_directories(path.buf, path.len, state);
534 if (S_ISREG(ce->ce_mode) && !ca) {
535 convert_attrs(state->istate, &ca_buf, ce->name);
539 return write_entry(ce, path.buf, ca, state, 0);
542 void unlink_entry(const struct cache_entry *ce)
544 const struct submodule *sub = submodule_from_ce(ce);
546 /* state.force is set at the caller. */
547 submodule_move_head(ce->name, "HEAD", NULL,
548 SUBMODULE_MOVE_HEAD_FORCE);
550 if (check_leading_path(ce->name, ce_namelen(ce), 1) >= 0)
552 if (remove_or_warn(ce->ce_mode, ce->name))
554 schedule_dir_for_removal(ce->name, ce_namelen(ce));