-int write_tree(unsigned char *sha1, int missing_ok, const char *prefix)
-{
- int entries, was_valid, newfd;
-
- /* We can't free this memory, it becomes part of a linked list parsed atexit() */
- struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
-
- newfd = hold_locked_index(lock_file, 1);
-
- entries = read_cache();
- if (entries < 0)
- die("git-write-tree: error reading cache");
-
- if (!active_cache_tree)
- active_cache_tree = cache_tree();
-
- was_valid = cache_tree_fully_valid(active_cache_tree);
-
- if (!was_valid) {
- if (cache_tree_update(active_cache_tree,
- active_cache, active_nr,
- missing_ok, 0) < 0)
- die("git-write-tree: error building trees");
- if (0 <= newfd) {
- if (!write_cache(newfd, active_cache, active_nr)
- && !close(newfd)) {
- commit_lock_file(lock_file);
- newfd = -1;
- }
- }
- /* Not being able to write is fine -- we are only interested
- * in updating the cache-tree part, and if the next caller
- * ends up using the old index with unupdated cache-tree part
- * it misses the work we did here, but that is just a
- * performance penalty and not a big deal.
- */
- }
-
- if (prefix) {
- struct cache_tree *subtree =
- cache_tree_find(active_cache_tree, prefix);
- hashcpy(sha1, subtree->sha1);
- }
- else
- hashcpy(sha1, active_cache_tree->sha1);
-
- if (0 <= newfd)
- close(newfd);
- rollback_lock_file(lock_file);
-
- return 0;
-}
-