Updated

node_modules/bun/lib/bun.js

@@ -0,0 +1,92 @@
+var stream = require("readable-stream");
+
+var BunWrapper = function BunWrapper(options) {
+  options = options || {};
+
+  if (Array.isArray(options)) {
+    options = {streams: options};
+  }
+
+  options.objectMode = true;
+
+  stream.Duplex.call(this, options);
+
+  var self = this;
+
+  // grab a copy of the streams array
+  this._streams = (options.streams || []).slice();
+
+  // we need at least one stream to do things
+  if (this._streams.length === 0) {
+    this._streams.push(new stream.PassThrough({objectMode: true}));
+  }
+
+  // default: true
+  this._bubbleErrors = (typeof options.bubbleErrors === "undefined") || !!options.bubbleErrors;
+
+  // error bubbling! yay!
+  if (this._bubbleErrors) {
+    for (var i=0;i<this._streams.length;++i) {
+      this._streams[i].on("error", function(e) {
+        return self.emit("error", e);
+      });
+    }
+  }
+
+  // 0 -> 1, 1 -> 2, ..., n-1 -> n
+  for (var i=0;i<this._streams.length-1;++i) {
+    this._streams[i].pipe(this._streams[i+1]);
+  }
+
+  // these might actually be the same. that's ok.
+  this._first = this._streams[0];
+  this._last  = this._streams[this._streams.length-1];
+
+  // .on("data") is supported again in 0.11 and has always worked in 0.10
+  this._last.on("data", function(e) {
+    if (!self.push(e)) {
+      self._last.pause();
+    }
+  });
+
+  // this is the readable side of our pipe ending
+  this._last.on("end", function() {
+    self.push(null);
+  });
+
+  // and here's the writable side finishing
+  this._first.on("finish", function() {
+    self.end();
+  });
+
+  // proxy through the .end() action
+  this.on("finish", function() {
+    self._first.end();
+  });
+};
+BunWrapper.prototype = Object.create(stream.Duplex.prototype, {constructor: {value: BunWrapper}});
+
+BunWrapper.prototype._write = function _write(input, encoding, done) {
+  this._first.write(input, done);
+};
+
+BunWrapper.prototype._read = function _read(n) {
+  this._last.resume();
+};
+
+// factory function
+var bun = module.exports = function bun(options, streams) {
+  if (Array.isArray(options)) {
+    var tmp = streams;
+    streams = options;
+    options = tmp;
+  }
+
+  options = options || {};
+
+  options.streams = options.streams || streams;
+
+  return new BunWrapper(options);
+};
+
+bun.BunWrapper = BunWrapper;