tadaniels/closure-compiler-plugin

Maven closure compiler plugin that provides closure compiler build integration inside of maven projects

Maven Closure Compiler Plugin

Intro

Within the closure-compiler Google code project (http://code.google.com/p/closure-compiler/), they have added a couple of convenience changes to make it easier to use the closure compiler within a Maven project.

1. The closure compiler can be resolved as a maven dependency:

    <dependency>
      <groupId>com.google.javascript</groupId>
      <artifactId>closure-compiler</artifactId>
      <version>r916</version>
    </dependency>
   

2. The provide an ant task in their source tree within the following class: com.google.javascript.jscomp.ant.CompileTask.java

Unfortunately, to use the compiler within a maven project still requires you to rely on the maven ant plugin to expose the ant task to your project.

This small project has a goal of providing a native maven plugin that can be declared and used in maven projects without the ant wrapper, with the hopeful benefit of making the usage pattern cleaner.

closure-compiler Dependencies

This plugin has a dependency on the r916 version of the closure compiler.

Using Plugin

Add this snippet to your pom.xml:

    <plugins>
      <plugin>
        <groupId>com.google.javascript</groupId>
        <artifactId>closure-compiler-plugin</artifactId>
        <version>1.0.0-SNAPSHOT</version>
      </plugin>
    </plugins>

By default this will

• bind to the package phase.
• look for resources that have a .js as an extension
• look in the src/main/webapp folder for resources
• audit the javascript, not write out compiled files
• use a compilation level of SIMPLE_OPTIMIZATIONS
• use a warning level of DEFAULT

An example of a pom.xml snippet to alter some of those defaults might look as follows:

    <plugins>
      <plugin>
        <groupId>com.google.javascript</groupId>
        <artifactId>closure-compiler-plugin</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>compiler</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <resourceDirectory>${basedir}/src/test/resources</resourceDirectory>
          <jsBuildDirectory>${basedir}/target/compiled-test</jsBuildDirectory>
          <jsFileName>test-js-build-file-min.js</jsFileName>
          <compilationLevel>SIMPLE_OPTIMIZATIONS</compilationLevel>
          <warningLevel>DEFAULT</warningLevel>
          <writeCompiledCode>true</writeCompiledCode>
          <force>true</force>
        </configuration>
      </plugin>
    </plugins>