nl_tokens: 分析文件的依赖
pl_tokens: function ( options ) { var me = this ; var filter = options && options . filter ; return me . custom ( function ( file , callback ) { if ( ! filter || ! filter ( file ) ) { var iterator = getIterator ( file ) ; if ( iterator ) { iterator ( file , me , { process : function ( file , dependencies ) { if ( dependencies . length > 0 ) { me . dependencyMap [ <mask> . path ] = uniqueDependencies ( dependencies ) . map ( function ( dependency ) { return dependency . absolute ; } ) ; } } } ) ; } } callback ( ) ; } ) ; }