nl_tokens: 获得文件的哈希（递归哈希）
pl_tokens: function ( filePath , hashMap , dependencyMap , cache ) { var me = this ; var recursiveHashMap = me . recursiveHashMap ; var hash = recursiveHashMap [ filePath ] ; if ( ! cache || ! hash ) { hash = getRecursiveHash ( filePath , hashMap , dependencyMap ) ; } if ( <mask> ) { recursiveHashMap [ filePath ] = hash ; } return hash ; }