Moved check_reqs.js to src, added jshint to npm test

package.json

@@ -7,17 +7,27 @@
   "description": "launch iOS apps iOS devices from the command line (Xcode 7)",
   "main": "ios-deploy",
   "scripts": {
-    "preinstall": "./check_reqs.js && xcodebuild"
+    "preinstall": "./src/check_reqs.js && xcodebuild"
   },
   "bin": "./build/Release/ios-deploy",
   "repository": {
     "type": "git",
     "url": "https://github.com/phonegap/ios-deploy"
   },
+  "devDependencies": {
+  	"jshint": "2.5.8"
+  },
+  "scripts": {
+  	"test": "npm run jshint",
+	"jshint": "node node_modules/jshint/bin/jshint src"
+  },
   "keywords": [
     "ios-deploy",
     "deploy to iOS device"
   ],
+  "bugs": {
+      "url": "https://github.com/phonegap/ios-deploy/issues"
+   },
   "author": "Greg Hughes",
   "license": "GPLv3"
 }

src/check_reqs.js

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+
+var util = require('util');
+var os = require('os');
+var child_process = require('child_process');
+
+var XCODEBUILD_MIN_VERSION = '6.0';
+var XCODEBUILD_NOT_FOUND_MESSAGE = util.format('Please install Xcode version %s or greater from the Mac App Store.', XCODEBUILD_MIN_VERSION);
+var TOOL = 'xcodebuild';
+
+var xcode_version = child_process.spawn(TOOL, ['-version']),
+	version_string = '';
+
+xcode_version.stdout.on('data', function (data) {
+	version_string += data;
+});
+
+xcode_version.stderr.on('data', function (data) {
+	console.log('stderr: ' + data);
+});
+
+xcode_version.on('error', function (err) {
+	console.log(util.format('Tool %s was not found. %s', TOOL, XCODEBUILD_NOT_FOUND_MESSAGE));
+});
+
+xcode_version.on('close', function (code) {
+	if (code === 0) {
+		var arr = version_string.match(/^Xcode (\d+\.\d+)/);
+		var ver = arr[1];
+
+		if (os.release() >= '15.0.0' && ver < '7.0') {
+			console.log(util.format('You need at least Xcode 7.0 when you are on OS X 10.11 El Capitan (you have version %s)', ver));
+			process.exit(1);
+		}
+
+		if (ver < XCODEBUILD_MIN_VERSION) {
+		    console.log(util.format('%s : %s. (you have version %s)', TOOL, XCODEBUILD_NOT_FOUND_MESSAGE, ver));
+		}
+	}
+	process.exit(code);
+});
+
+
+
+