Add a configuration generator

Command:

    browserstack-runner init [preset]

Right now only one preset is present: default

Author: Rohan Jain

README.md

@@ -16,7 +16,13 @@ For development,
 ## Configuration
 To run browser tests on BrowserStack infrastructure, you need to
 create a `browserstack.json` file in project's root directory (the
-directory from which tests are run).
+directory from which tests are run), by running this command:
+
+    browserstack-runner init [preset]
+
+If nothing is provided as `preset` **default** is used.
+
+> Currently only one preset is present: **default**
 
 ### Parameters
 

bin/cli.js

@@ -0,0 +1,10 @@
+#! /usr/bin/env node
+
+var executable = process.argv[2] || 'runner';
+
+try {
+  require('./' + executable + '.js');
+} catch (e) {
+  console.log(e);
+  console.log('Invalid command.');
+}

bin/init.js

@@ -0,0 +1,19 @@
+#! /usr/bin/env node
+
+var fs = require('fs');
+var preset = process.argv[3] || 'default';
+var browsers = require('../presets/' + preset + '.json');
+
+var config = {
+  username: 'BROWSERSTACK_USERNAME',
+  key: 'BROWSERSTACK_KEY',
+  test_path: 'path/to/test/runner',
+  browsers: browsers
+}
+
+var configString = JSON.stringify(config, null, 4);
+
+fs.writeFile('browserstack.json', configString, function (err, written, buffer) {
+  console.log('Generated `browserstack.json` using preset "%s" having %d browsers.',
+              preset, browsers.length);
+});

browserstack.sample.json

@@ -1,7 +1,7 @@
 {
   "name": "browserstack-runner",
   "description": "A command line interface to run browser tests over BrowserStack",
-  "version": "0.0.5",
+  "version": "0.0.6",
   "homepage": "https://github.com/browserstack/browserstack-runner",
   "repository": {
     "type": "git",
@@ -11,6 +11,6 @@
     "browserstack": "git://github.com/browserstack/node-browserstack.git"
   },
   "bin": {
-    "browserstack-runner": "bin/runner.js"
+    "browserstack-runner": "bin/cli.js"
   }
 }

package.json

@@ -0,0 +1,37 @@
+[{
+  "browser": "firefox",
+  "browser_version": "latest",
+  "os": "OS X",
+  "os_version": "Snow Leopard",
+  "device": null
+},{
+  "browser": "chrome",
+  "browser_version": "latest",
+  "os": "OS X",
+  "os_version": "Snow Leopard",
+  "device": null
+}, {
+  "browser": "firefox",
+  "browser_version": "latest",
+  "os": "Windows",
+  "os_version": "7",
+  "device": null
+}, {
+  "browser": "chrome",
+  "browser_version": "latest",
+  "os": "Windows",
+  "os_version": "7",
+  "device": null
+}, {
+  "browser": "ie",
+  "browser_version": "latest",
+  "os": "Windows",
+  "os_version": "7",
+  "device": null
+}, {
+  "browser": "ie",
+  "browser_version": "latest",
+  "os": "Windows",
+  "os_version": "8",
+  "device": null
+}]