Streams confusion

dont-end.js

// This doesn't work because I use { end: false } but I need the fd

var fs = require('fs');

var outStream = fs.createWriteStream('out-file.txt');

outStream.once('finish', function() {
  console.log('finish');
  outStream.end();
});

var inStream = fs.createReadStream('file.txt');

inStream.pipe(outStream, { end: false });

end.js

// This works when I remove { end: false } but it closes the fd

var fs = require('fs');

var outStream = fs.createWriteStream('out-file.txt');

outStream.once('finish', function() {
  console.log('finish');
  outStream.end();
});

var inStream = fs.createReadStream('file.txt');

inStream.pipe(outStream);