nl_tokens: streamify ( { index : FetcherIndex } transform : Function ) = > Stream
pl_tokens: function streamify ( opts , <mask> ) { return through2 . obj ( // (vfile: VinylFile, enc: String, cb: Function) ( vfile , enc , cb ) => { var contents = vfile . contents . toString ( enc ) ; var result ; var onSuccess = ( contents ) => { vfile . contents = new Buffer ( contents , enc ) ; // eslint-disable-line node/no-deprecated-api // TODO: drop Node.js 4.x support, use `Buffer.from()` instead cb ( null , vfile ) ; } ; var onError = ( err ) => { cb ( err ) ; } ; try { result = transform ( { contents : contents , fetcher : opts . fetcher , filePath : vfile . path , index : opts . index } ) ; } catch ( err ) { onError ( err ) ; return ; } if ( isPromise ( result ) ) { result . then ( onSuccess ) . catch ( onError ) ; return ; } onSuccess ( result ) ; } ) ; }