Use InputAgent for the keyboard.

lib/util/streamutil.js

@@ -0,0 +1,63 @@
+var Promise = require('bluebird')
+var split = require('split')
+
+module.exports.readAll = function(stream) {
+  var resolver = Promise.defer()
+    , collected = new Buffer(0)
+
+  function errorListener(err) {
+    resolver.reject(err)
+  }
+
+  function endListener() {
+    resolver.resolve(collected)
+  }
+
+  function readableListener() {
+    var chunk;
+    while (chunk = stream.read()) {
+      collected = Buffer.concat([collected, chunk])
+    }
+  }
+
+  stream.on('error', errorListener)
+  stream.on('readable', readableListener)
+  stream.on('end', endListener)
+
+  return resolver.promise.finally(function() {
+    stream.removeListener('error', errorListener)
+    stream.removeListener('readable', readableListener)
+    stream.removeListener('end', endListener)
+  })
+}
+
+
+module.exports.findLine = function(stream, re) {
+  var resolver = Promise.defer()
+    , piped = stream.pipe(split())
+
+  function errorListener(err) {
+    resolver.reject(err)
+  }
+
+  function endListener() {
+    resolver.reject(new Error('No matching line found'))
+  }
+
+  function lineListener(line) {
+    if (re.test(line)) {
+      resolver.resolve(line)
+    }
+  }
+
+  piped.on('error', errorListener)
+  piped.on('data', lineListener)
+  piped.on('end', endListener)
+
+  return resolver.promise.finally(function() {
+    piped.removeListener('error', errorListener)
+    piped.removeListener('data', lineListener)
+    piped.removeListener('end', endListener)
+    stream.unpipe(piped)
+  })
+}