nl_tokens: / * Rename filepath using transformer
pl_tokens: function rename ( filepath , transformer ) { var result ; /*
          Return a file object
      
          {
            dirname
            basename
            extname
            origin
          }
        */ var fileObj = parse ( filepath ) ; if ( ! transformer ) { result = stringify ( fileObj ) ; debug ( 'transform to %s with no transformer' , result ) ; return result ; } /*
          transformed object
      
          {
            dirname
            prefix
            basename
            suffix
            extname
          }
        */ var transformed = util . isFunction ( transformer ) ? transformer ( fileObj ) : transformer ; // rename it when transformer is string as a filepath if ( util . isString ( transformed ) ) { <mask> = transformed || stringify ( fileObj ) ; debug ( 'transform from %j to `%s` with %j' , fileObj , result , transformed ) ; return result ; } if ( ! util . isObject ( transformed ) ) { throw new Error ( 'transformer should be string, function or object.' ) ; } result = transform ( fileObj , transformed ) ; debug ( 'transform from %j to `%s` with %j' , fileObj , result , transformed ) ; return result ; }