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Overview

This bundle eases development with the Google Closure Tools by providing some useful command line tools.

Installation

Checkout a copy of the code:

git submodule add https://github.com/schmittjoh/JMSGoogleClosureBundle.git src/JMS/GoogleClosureBundle

Then register the bundle with your kernel:

// in AppKernel::registerBundles()
$bundles = array(
    // ...
    new JMS\GoogleClosureBundle\JMSGoogleClosureBundle(),
    // ...
);

You also need to download the plovr.jar file from:

http://code.google.com/p/plovr/downloads/list

Plovr is a lightweight wrapper around the Google Closure Tools (Compiler, Library, and Templates).

Configuration

Below is the default configuration, you only need to change it if you want to place plovr somewhere else:

jms_google_closure:
    plovr:
        jar_path: %kernel.root_dir%/vendor/plovr/plovr.jar

Usage

Running plovr during development

Plovr by default listens on port 9810, and will automatically compile your application when a request comes in. To start plovr, you first have to create a plovr configuration file. Plovr configuration files are simple Javascript object literals. It’s important that you place this file somewhere below Resources/config/plovr/ in your bundle:

// Resources/config/plovr/compile.js
{
    "id": "some-unique-id",
    "paths": ["@MyBundle/Resources/public/javascript/"],
    "mode": "ADVANCED",
    "level": "VERBOSE",
    // this is the entry point to your application
    "inputs": "@MyBundle/Resources/public/javascript/app.js",

    "pretty-print": true,
    "debug": true
}

After you have set-up the configuration file, you can run Plovr by running:

php app/console plovr:start @MyBundle/compile.js

Your Javascript source code will now be compiled upon request, and is available at:

http://localhost:9810/compile?id=some-unique-id

Compiling for production

When you go to production, you only want to compile the Javascript once, and probably want the Google Closure Compiler to be a bit more aggressive when optimizing your code, therefore it’s typically better to set-up a separate configuration file:

// Resources/config/plovr/build.js
{
    "id": "some-unique-id",
    "paths": ["@MyBundle/Resources/public/javascript/"],
    "mode": "ADVANCED",
    "level": "VERBOSE",
    // this is the entry point to your application
    "inputs": "@MyBundle/Resources/public/javascript/app.js",

    // this allows you to overwrite Javascript "constants" at compile-time
    "define": {
      "goog.DEBUG": false
    },

    // "@MyBundle" will be expanded to the location of your bundle automatically
    "output-file": "@MyBundle/Resources/public/javascript/build/app.js",

    // This allows you to apply some nice copyright at the top of the compiled file.
    // It's also a good idea to wrap the generated code in a closure.
    "output-wrapper": "/**\n * Portions of this code are from the Google Closure Library,\n * received from the Closure Authors under the Apache 2.0 license.\n *\n * All other code is (C) 2011 XYZ\n * All rights reserved.\n */\n(function() {%output%})();",

    "debug": false
}

You can then compile your Javascript application using the following command:

php app/console plovr:build @MyBundle/build.js