Closure Maven Plugin

The Closure Maven Plugin makes it easy to write web applications in Maven by integrating Closure CSS, JavaScript, Template, and Protocol Buffers compilation.

Goals Overview

closure:generate-sources compiles .css, .js, .proto, and .soy files generating .class and .js files and resources that are bundled into the output JAR.

Usage

<plugin>
  <groupId>com.google.closure</groupId>
  <artifactId>closure-maven-plugin</artifactId>
  <version>1.2.0</version>
  <executions>
    <execution>
      <goals>
        <goal>generate-closure-sources</goal>
      </goals>
    </execution>
  </executions>
  <configuration>
    <!-- See Configuration -->
  </configuration>
</plugin>

processes web sources. Specifically, it

  • looks for .css and .gss files under src/site/css and, for every file that ends with -main.css,gss creates a compiled stylesheet.
  • looks for .proto files under src/main/proto and generates .java and .js files for each message type.
  • looks for .soy files under src/main/soy and generates Java classes and .js files for each template.
  • looks for .js files under src/main/js, and for each goog.module('...') declaration, generates a compiled JS file. Closure library and generated JS files are automatically linked in.

Outputs

By default, non-java outputs are collected in the target/classes/closure directory, so they are available as resources. The Soy Juice module works with this layout to enable Soy rendering from Java code, and the generated WebFiles Java class contains constants for each output.

  • target/classes/closure/js contains one JS file for each JS module.
  • target/classes/closure/css contains one CSS file for each main CSS or GSS source, and also contains the CSS rename map in JSON format.
  • target/classes/closure/proto contains the full descriptor set.

Configuration

See Configuration for an exhaustive list of configuration options.

Examples