Squashed 'third_party/git/' content from commit cb71568594
git-subtree-dir: third_party/git git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7
This commit is contained in:
Vincent Ambo
commit
1b593e1ea4
3629 changed files with 1139935 additions and 0 deletions
538
entry.c
Normal file
538
entry.c
Normal file
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@ -0,0 +1,538 @@
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#include "cache.h"
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#include "blob.h"
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#include "object-store.h"
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#include "dir.h"
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#include "streaming.h"
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#include "submodule.h"
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#include "progress.h"
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#include "fsmonitor.h"
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static void create_directories(const char *path, int path_len,
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const struct checkout *state)
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{
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char *buf = xmallocz(path_len);
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int len = 0;
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while (len < path_len) {
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do {
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buf[len] = path[len];
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len++;
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} while (len < path_len && path[len] != '/');
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if (len >= path_len)
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break;
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buf[len] = 0;
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/*
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* For 'checkout-index --prefix=<dir>', <dir> is
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* allowed to be a symlink to an existing directory,
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* and we set 'state->base_dir_len' below, such that
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* we test the path components of the prefix with the
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* stat() function instead of the lstat() function.
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*/
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if (has_dirs_only_path(buf, len, state->base_dir_len))
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continue; /* ok, it is already a directory. */
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/*
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* If this mkdir() would fail, it could be that there
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* is already a symlink or something else exists
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* there, therefore we then try to unlink it and try
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* one more time to create the directory.
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*/
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if (mkdir(buf, 0777)) {
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if (errno == EEXIST && state->force &&
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!unlink_or_warn(buf) && !mkdir(buf, 0777))
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continue;
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die_errno("cannot create directory at '%s'", buf);
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}
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}
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free(buf);
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}
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static void remove_subtree(struct strbuf *path)
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{
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DIR *dir = opendir(path->buf);
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struct dirent *de;
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int origlen = path->len;
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if (!dir)
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die_errno("cannot opendir '%s'", path->buf);
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while ((de = readdir(dir)) != NULL) {
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struct stat st;
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if (is_dot_or_dotdot(de->d_name))
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continue;
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strbuf_addch(path, '/');
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strbuf_addstr(path, de->d_name);
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if (lstat(path->buf, &st))
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die_errno("cannot lstat '%s'", path->buf);
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if (S_ISDIR(st.st_mode))
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remove_subtree(path);
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else if (unlink(path->buf))
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die_errno("cannot unlink '%s'", path->buf);
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strbuf_setlen(path, origlen);
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}
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closedir(dir);
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if (rmdir(path->buf))
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die_errno("cannot rmdir '%s'", path->buf);
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}
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static int create_file(const char *path, unsigned int mode)
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{
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mode = (mode & 0100) ? 0777 : 0666;
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return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
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}
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static void *read_blob_entry(const struct cache_entry *ce, unsigned long *size)
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{
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enum object_type type;
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void *blob_data = read_object_file(&ce->oid, &type, size);
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if (blob_data) {
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if (type == OBJ_BLOB)
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return blob_data;
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free(blob_data);
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}
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return NULL;
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}
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static int open_output_fd(char *path, const struct cache_entry *ce, int to_tempfile)
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{
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int symlink = (ce->ce_mode & S_IFMT) != S_IFREG;
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if (to_tempfile) {
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xsnprintf(path, TEMPORARY_FILENAME_LENGTH, "%s",
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symlink ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX");
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return mkstemp(path);
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} else {
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return create_file(path, !symlink ? ce->ce_mode : 0666);
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}
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}
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static int fstat_output(int fd, const struct checkout *state, struct stat *st)
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{
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/* use fstat() only when path == ce->name */
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if (fstat_is_reliable() &&
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state->refresh_cache && !state->base_dir_len) {
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fstat(fd, st);
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return 1;
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}
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return 0;
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}
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static int streaming_write_entry(const struct cache_entry *ce, char *path,
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struct stream_filter *filter,
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const struct checkout *state, int to_tempfile,
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int *fstat_done, struct stat *statbuf)
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{
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int result = 0;
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int fd;
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fd = open_output_fd(path, ce, to_tempfile);
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if (fd < 0)
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return -1;
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result |= stream_blob_to_fd(fd, &ce->oid, filter, 1);
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*fstat_done = fstat_output(fd, state, statbuf);
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result |= close(fd);
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if (result)
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unlink(path);
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return result;
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}
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void enable_delayed_checkout(struct checkout *state)
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{
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if (!state->delayed_checkout) {
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state->delayed_checkout = xmalloc(sizeof(*state->delayed_checkout));
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||||
state->delayed_checkout->state = CE_CAN_DELAY;
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string_list_init(&state->delayed_checkout->filters, 0);
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string_list_init(&state->delayed_checkout->paths, 0);
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}
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}
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static int remove_available_paths(struct string_list_item *item, void *cb_data)
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{
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struct string_list *available_paths = cb_data;
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struct string_list_item *available;
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available = string_list_lookup(available_paths, item->string);
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if (available)
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available->util = (void *)item->string;
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return !available;
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||||
}
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int finish_delayed_checkout(struct checkout *state, int *nr_checkouts)
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{
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||||
int errs = 0;
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unsigned delayed_object_count;
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off_t filtered_bytes = 0;
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struct string_list_item *filter, *path;
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||||
struct progress *progress;
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||||
struct delayed_checkout *dco = state->delayed_checkout;
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if (!state->delayed_checkout)
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return errs;
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dco->state = CE_RETRY;
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delayed_object_count = dco->paths.nr;
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progress = start_delayed_progress(_("Filtering content"), delayed_object_count);
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while (dco->filters.nr > 0) {
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for_each_string_list_item(filter, &dco->filters) {
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struct string_list available_paths = STRING_LIST_INIT_NODUP;
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display_progress(progress, delayed_object_count - dco->paths.nr);
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if (!async_query_available_blobs(filter->string, &available_paths)) {
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/* Filter reported an error */
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errs = 1;
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filter->string = "";
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continue;
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||||
}
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||||
if (available_paths.nr <= 0) {
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/*
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* Filter responded with no entries. That means
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* the filter is done and we can remove the
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* filter from the list (see
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* "string_list_remove_empty_items" call below).
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*/
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filter->string = "";
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continue;
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||||
}
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||||
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||||
/*
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||||
* In dco->paths we store a list of all delayed paths.
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* The filter just send us a list of available paths.
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* Remove them from the list.
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*/
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filter_string_list(&dco->paths, 0,
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&remove_available_paths, &available_paths);
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for_each_string_list_item(path, &available_paths) {
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struct cache_entry* ce;
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if (!path->util) {
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error("external filter '%s' signaled that '%s' "
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"is now available although it has not been "
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"delayed earlier",
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filter->string, path->string);
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errs |= 1;
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/*
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* Do not ask the filter for available blobs,
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* again, as the filter is likely buggy.
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*/
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filter->string = "";
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continue;
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}
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ce = index_file_exists(state->istate, path->string,
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strlen(path->string), 0);
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if (ce) {
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errs |= checkout_entry(ce, state, NULL, nr_checkouts);
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filtered_bytes += ce->ce_stat_data.sd_size;
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display_throughput(progress, filtered_bytes);
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} else
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errs = 1;
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}
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}
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string_list_remove_empty_items(&dco->filters, 0);
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}
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stop_progress(&progress);
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string_list_clear(&dco->filters, 0);
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/* At this point we should not have any delayed paths anymore. */
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errs |= dco->paths.nr;
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for_each_string_list_item(path, &dco->paths) {
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error("'%s' was not filtered properly", path->string);
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}
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string_list_clear(&dco->paths, 0);
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free(dco);
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state->delayed_checkout = NULL;
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return errs;
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}
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static int write_entry(struct cache_entry *ce,
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char *path, const struct checkout *state, int to_tempfile)
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{
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unsigned int ce_mode_s_ifmt = ce->ce_mode & S_IFMT;
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struct delayed_checkout *dco = state->delayed_checkout;
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int fd, ret, fstat_done = 0;
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char *new_blob;
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struct strbuf buf = STRBUF_INIT;
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unsigned long size;
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ssize_t wrote;
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size_t newsize = 0;
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struct stat st;
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const struct submodule *sub;
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if (ce_mode_s_ifmt == S_IFREG) {
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struct stream_filter *filter = get_stream_filter(state->istate, ce->name,
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&ce->oid);
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if (filter &&
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!streaming_write_entry(ce, path, filter,
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state, to_tempfile,
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&fstat_done, &st))
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goto finish;
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}
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switch (ce_mode_s_ifmt) {
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case S_IFLNK:
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new_blob = read_blob_entry(ce, &size);
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if (!new_blob)
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return error("unable to read sha1 file of %s (%s)",
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path, oid_to_hex(&ce->oid));
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/*
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* We can't make a real symlink; write out a regular file entry
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* with the symlink destination as its contents.
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*/
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if (!has_symlinks || to_tempfile)
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goto write_file_entry;
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ret = symlink(new_blob, path);
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free(new_blob);
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||||
if (ret)
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||||
return error_errno("unable to create symlink %s", path);
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break;
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||||
|
||||
case S_IFREG:
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||||
/*
|
||||
* We do not send the blob in case of a retry, so do not
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||||
* bother reading it at all.
|
||||
*/
|
||||
if (dco && dco->state == CE_RETRY) {
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||||
new_blob = NULL;
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||||
size = 0;
|
||||
} else {
|
||||
new_blob = read_blob_entry(ce, &size);
|
||||
if (!new_blob)
|
||||
return error("unable to read sha1 file of %s (%s)",
|
||||
path, oid_to_hex(&ce->oid));
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert from git internal format to working tree format
|
||||
*/
|
||||
if (dco && dco->state != CE_NO_DELAY) {
|
||||
ret = async_convert_to_working_tree(state->istate, ce->name, new_blob,
|
||||
size, &buf, dco);
|
||||
if (ret && string_list_has_string(&dco->paths, ce->name)) {
|
||||
free(new_blob);
|
||||
goto delayed;
|
||||
}
|
||||
} else
|
||||
ret = convert_to_working_tree(state->istate, ce->name, new_blob, size, &buf);
|
||||
|
||||
if (ret) {
|
||||
free(new_blob);
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||||
new_blob = strbuf_detach(&buf, &newsize);
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||||
size = newsize;
|
||||
}
|
||||
/*
|
||||
* No "else" here as errors from convert are OK at this
|
||||
* point. If the error would have been fatal (e.g.
|
||||
* filter is required), then we would have died already.
|
||||
*/
|
||||
|
||||
write_file_entry:
|
||||
fd = open_output_fd(path, ce, to_tempfile);
|
||||
if (fd < 0) {
|
||||
free(new_blob);
|
||||
return error_errno("unable to create file %s", path);
|
||||
}
|
||||
|
||||
wrote = write_in_full(fd, new_blob, size);
|
||||
if (!to_tempfile)
|
||||
fstat_done = fstat_output(fd, state, &st);
|
||||
close(fd);
|
||||
free(new_blob);
|
||||
if (wrote < 0)
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||||
return error("unable to write file %s", path);
|
||||
break;
|
||||
|
||||
case S_IFGITLINK:
|
||||
if (to_tempfile)
|
||||
return error("cannot create temporary submodule %s", path);
|
||||
if (mkdir(path, 0777) < 0)
|
||||
return error("cannot create submodule directory %s", path);
|
||||
sub = submodule_from_ce(ce);
|
||||
if (sub)
|
||||
return submodule_move_head(ce->name,
|
||||
NULL, oid_to_hex(&ce->oid),
|
||||
state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
|
||||
break;
|
||||
|
||||
default:
|
||||
return error("unknown file mode for %s in index", path);
|
||||
}
|
||||
|
||||
finish:
|
||||
if (state->refresh_cache) {
|
||||
assert(state->istate);
|
||||
if (!fstat_done)
|
||||
if (lstat(ce->name, &st) < 0)
|
||||
return error_errno("unable to stat just-written file %s",
|
||||
ce->name);
|
||||
fill_stat_cache_info(state->istate, ce, &st);
|
||||
ce->ce_flags |= CE_UPDATE_IN_BASE;
|
||||
mark_fsmonitor_invalid(state->istate, ce);
|
||||
state->istate->cache_changed |= CE_ENTRY_CHANGED;
|
||||
}
|
||||
delayed:
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* This is like 'lstat()', except it refuses to follow symlinks
|
||||
* in the path, after skipping "skiplen".
|
||||
*/
|
||||
static int check_path(const char *path, int len, struct stat *st, int skiplen)
|
||||
{
|
||||
const char *slash = path + len;
|
||||
|
||||
while (path < slash && *slash != '/')
|
||||
slash--;
|
||||
if (!has_dirs_only_path(path, slash - path, skiplen)) {
|
||||
errno = ENOENT;
|
||||
return -1;
|
||||
}
|
||||
return lstat(path, st);
|
||||
}
|
||||
|
||||
static void mark_colliding_entries(const struct checkout *state,
|
||||
struct cache_entry *ce, struct stat *st)
|
||||
{
|
||||
int i, trust_ino = check_stat;
|
||||
|
||||
#if defined(GIT_WINDOWS_NATIVE) || defined(__CYGWIN__)
|
||||
trust_ino = 0;
|
||||
#endif
|
||||
|
||||
ce->ce_flags |= CE_MATCHED;
|
||||
|
||||
for (i = 0; i < state->istate->cache_nr; i++) {
|
||||
struct cache_entry *dup = state->istate->cache[i];
|
||||
|
||||
if (dup == ce)
|
||||
break;
|
||||
|
||||
if (dup->ce_flags & (CE_MATCHED | CE_VALID | CE_SKIP_WORKTREE))
|
||||
continue;
|
||||
|
||||
if ((trust_ino && !match_stat_data(&dup->ce_stat_data, st)) ||
|
||||
(!trust_ino && !fspathcmp(ce->name, dup->name))) {
|
||||
dup->ce_flags |= CE_MATCHED;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Write the contents from ce out to the working tree.
|
||||
*
|
||||
* When topath[] is not NULL, instead of writing to the working tree
|
||||
* file named by ce, a temporary file is created by this function and
|
||||
* its name is returned in topath[], which must be able to hold at
|
||||
* least TEMPORARY_FILENAME_LENGTH bytes long.
|
||||
*/
|
||||
int checkout_entry(struct cache_entry *ce, const struct checkout *state,
|
||||
char *topath, int *nr_checkouts)
|
||||
{
|
||||
static struct strbuf path = STRBUF_INIT;
|
||||
struct stat st;
|
||||
|
||||
if (ce->ce_flags & CE_WT_REMOVE) {
|
||||
if (topath)
|
||||
/*
|
||||
* No content and thus no path to create, so we have
|
||||
* no pathname to return.
|
||||
*/
|
||||
BUG("Can't remove entry to a path");
|
||||
unlink_entry(ce);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (topath)
|
||||
return write_entry(ce, topath, state, 1);
|
||||
|
||||
strbuf_reset(&path);
|
||||
strbuf_add(&path, state->base_dir, state->base_dir_len);
|
||||
strbuf_add(&path, ce->name, ce_namelen(ce));
|
||||
|
||||
if (!check_path(path.buf, path.len, &st, state->base_dir_len)) {
|
||||
const struct submodule *sub;
|
||||
unsigned changed = ie_match_stat(state->istate, ce, &st,
|
||||
CE_MATCH_IGNORE_VALID | CE_MATCH_IGNORE_SKIP_WORKTREE);
|
||||
/*
|
||||
* Needs to be checked before !changed returns early,
|
||||
* as the possibly empty directory was not changed
|
||||
*/
|
||||
sub = submodule_from_ce(ce);
|
||||
if (sub) {
|
||||
int err;
|
||||
if (!is_submodule_populated_gently(ce->name, &err)) {
|
||||
struct stat sb;
|
||||
if (lstat(ce->name, &sb))
|
||||
die(_("could not stat file '%s'"), ce->name);
|
||||
if (!(st.st_mode & S_IFDIR))
|
||||
unlink_or_warn(ce->name);
|
||||
|
||||
return submodule_move_head(ce->name,
|
||||
NULL, oid_to_hex(&ce->oid), 0);
|
||||
} else
|
||||
return submodule_move_head(ce->name,
|
||||
"HEAD", oid_to_hex(&ce->oid),
|
||||
state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
|
||||
}
|
||||
|
||||
if (!changed)
|
||||
return 0;
|
||||
if (!state->force) {
|
||||
if (!state->quiet)
|
||||
fprintf(stderr,
|
||||
"%s already exists, no checkout\n",
|
||||
path.buf);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (state->clone)
|
||||
mark_colliding_entries(state, ce, &st);
|
||||
|
||||
/*
|
||||
* We unlink the old file, to get the new one with the
|
||||
* right permissions (including umask, which is nasty
|
||||
* to emulate by hand - much easier to let the system
|
||||
* just do the right thing)
|
||||
*/
|
||||
if (S_ISDIR(st.st_mode)) {
|
||||
/* If it is a gitlink, leave it alone! */
|
||||
if (S_ISGITLINK(ce->ce_mode))
|
||||
return 0;
|
||||
if (!state->force)
|
||||
return error("%s is a directory", path.buf);
|
||||
remove_subtree(&path);
|
||||
} else if (unlink(path.buf))
|
||||
return error_errno("unable to unlink old '%s'", path.buf);
|
||||
} else if (state->not_new)
|
||||
return 0;
|
||||
|
||||
create_directories(path.buf, path.len, state);
|
||||
if (nr_checkouts)
|
||||
(*nr_checkouts)++;
|
||||
return write_entry(ce, path.buf, state, 0);
|
||||
}
|
||||
|
||||
void unlink_entry(const struct cache_entry *ce)
|
||||
{
|
||||
const struct submodule *sub = submodule_from_ce(ce);
|
||||
if (sub) {
|
||||
/* state.force is set at the caller. */
|
||||
submodule_move_head(ce->name, "HEAD", NULL,
|
||||
SUBMODULE_MOVE_HEAD_FORCE);
|
||||
}
|
||||
if (!check_leading_path(ce->name, ce_namelen(ce)))
|
||||
return;
|
||||
if (remove_or_warn(ce->ce_mode, ce->name))
|
||||
return;
|
||||
schedule_dir_for_removal(ce->name, ce_namelen(ce));
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue