app.portBindings and newManifest.tcpPorts may be null

src/vbox.js

@@ -0,0 +1,40 @@
+'use strict';
+
+// we can possibly remove this entire file and make our tests
+// smarter to just use the host interface provided by boot2docker
+// https://github.com/boot2docker/boot2docker#container-port-redirection
+// https://github.com/boot2docker/boot2docker/pull/93
+// https://github.com/docker/docker/issues/4007
+
+exports = module.exports = {
+    forwardFromHostToVirtualBox: forwardFromHostToVirtualBox,
+    unforwardFromHostToVirtualBox: unforwardFromHostToVirtualBox
+};
+
+var assert = require('assert'),
+    child_process = require('child_process'),
+    debug = require('debug')('box:vbox'),
+    os = require('os');
+
+
+function forwardFromHostToVirtualBox(rulename, port) {
+    assert.strictEqual(typeof rulename, 'string');
+    assert.strictEqual(typeof port, 'number');
+
+    if (os.platform() === 'darwin') {
+        debug('Setting up VirtualBox port forwarding for '+ rulename + ' at ' + port);
+        child_process.exec(
+            'VBoxManage controlvm boot2docker-vm natpf1 delete ' + rulename + ';' +
+            'VBoxManage controlvm boot2docker-vm natpf1 ' + rulename + ',tcp,127.0.0.1,' + port + ',,' + port);
+    }
+}
+
+function unforwardFromHostToVirtualBox(rulename) {
+    assert.strictEqual(typeof rulename, 'string');
+
+    if (os.platform() === 'darwin') {
+        debug('Removing VirtualBox port forwarding for '+ rulename);
+        child_process.exec('VBoxManage controlvm boot2docker-vm natpf1 delete ' + rulename);
+    }
+}
+