app.portBindings and newManifest.tcpPorts may be null

src/docker.js

@@ -0,0 +1,42 @@
+'use strict';
+
+var Docker = require('dockerode'),
+    fs = require('fs'),
+    os = require('os'),
+    path = require('path'),
+    url = require('url');
+
+exports = module.exports = (function () {
+    var docker;
+    var options = connectOptions(); // the real docker
+
+    if (process.env.NODE_ENV === 'test') {
+        // test code runs a docker proxy on this port
+        docker = new Docker({ host: 'http://localhost', port: 5687 });
+    } else {
+        docker = new Docker(options);
+    }
+
+    // proxy code uses this to route to the real docker
+    docker.options = options;
+
+    return docker;
+})();
+
+function connectOptions() {
+    if (os.platform() === 'linux') return { socketPath: '/var/run/docker.sock' };
+
+    // boot2docker configuration
+    var DOCKER_CERT_PATH = process.env.DOCKER_CERT_PATH || path.join(process.env.HOME, '.boot2docker/certs/boot2docker-vm');
+    var DOCKER_HOST = process.env.DOCKER_HOST || 'tcp://192.168.59.103:2376';
+
+    return {
+        protocol: 'https',
+        host: url.parse(DOCKER_HOST).hostname,
+        port: url.parse(DOCKER_HOST).port,
+        ca: fs.readFileSync(path.join(DOCKER_CERT_PATH, 'ca.pem')),
+        cert: fs.readFileSync(path.join(DOCKER_CERT_PATH, 'cert.pem')),
+        key: fs.readFileSync(path.join(DOCKER_CERT_PATH, 'key.pem'))
+    };
+}
+