Google Closure Compiler plugin for Grails

Description

This plugin compiles/optimizes your javascript resources with the Google Closure Compiler.

It provides three compilation levels. WHITESPACE_ONLY, SIMPLE_OPTIMIZATIONS and ADVANCED_OPTIMIZATIONS.

N.B. It builds/depends on the Grails Resources Plugin.

Installation

grails install-plugin closure-compiler

Usage

If you use the Grails Resources Plugin correctly the plugin will detect your js files and compile them automatically.

Files ending with .min.js is excluded.

Configuration

The Google Closure compiler have three different compilation levels:

• WHITESPACE_ONLY
• SIMPLE_OPTIMIZATIONS
• ADVANCED_OPTIMIZATIONS

These can be configured with the variable:

grails.resources.mappers.googleclosurecompiler.compilation_level

The default level is SIMPLE_OPTIMIZATIONS See the [Google Closure Compiler Docs] (https://developers.google.com/closure/compiler/docs/compilation_levels) for more information.

You can also add custom compiler configuration by adding them to the configuration:

grails.resources.mappers.googleclosurecompiler.compilation_level = 'SIMPLE_OPTIMIZATIONS'
grails.resources.mappers.googleclosurecompiler.compilerOptions = [
    languageIn: CompilerOptions.LanguageMode.ECMASCRIPT5
]

If you want specify compiler options for a single file, it can be done using the attrs map in the ApplicationResource file:

resource url: 'js/ember.js', attrs: [googlecompiler: [languageIn: CompilerOptions.LanguageMode.ECMASCRIPT5]]

Disable the plugin for certain enviroments:

environments {
    development {
        grails.resources.mappers.googleclosurecompiler.disable = true
    }
}