Function update_one

cache-tree.c:257–473

}

static int update_one(struct cache_tree *it,
		      struct cache_entry **cache,
		      int entries,
		      const char *base,
		      int baselen,
		      int *skip_count,
		      int flags)
{
	struct strbuf buffer;
	int missing_ok = flags & WRITE_TREE_MISSING_OK;
	int dryrun = flags & WRITE_TREE_DRY_RUN;
	int repair = flags & WRITE_TREE_REPAIR;
	int to_invalidate = 0;
	int i;

	assert(!(dryrun && repair));

	*skip_count = 0;

	/*
	 * If the first entry of this region is a sparse directory
	 * entry corresponding exactly to 'base', then this cache_tree
	 * struct is a "leaf" in the data structure, pointing to the
	 * tree OID specified in the entry.
	 */
	if (entries > 0) {
		const struct cache_entry *ce = cache[0];

		if (S_ISSPARSEDIR(ce->ce_mode) &&
		    ce->ce_namelen == baselen &&
		    !strncmp(ce->name, base, baselen)) {
			it->entry_count = 1;
			oidcpy(&it->oid, &ce->oid);
			return 1;
		}
	}

	if (0 <= it->entry_count &&
	    odb_has_object(the_repository->objects, &it->oid,
			   ODB_HAS_OBJECT_RECHECK_PACKED | ODB_HAS_OBJECT_FETCH_PROMISOR))
		return it->entry_count;

	/*
	 * We first scan for subtrees and update them; we start by
	 * marking existing subtrees -- the ones that are unmarked
	 * should not be in the result.
	 */
	for (i = 0; i < it->subtree_nr; i++)
		it->down[i]->used = 0;

	/*
	 * Find the subtrees and update them.
	 */
	i = 0;
	while (i < entries) {
		const struct cache_entry *ce = cache[i];
		struct cache_tree_sub *sub;
		const char *path, *slash;