Minify Maven Plugin

Usage

This document is intended to provide instructions for using the Minify Maven Plugin.
In order for this discussion to be useful, it's critical to cover two topics:

Configuring your project's pom.xml to run the plugin during the project's build cycle
Invoking the plugin from the command-line

Configure Minify Maven Plugin

By tying the goals of the plugin to a phase in the build cycle, the specified goals will run each time that phase of the build cycle is executed. Doing this can make it easier to add the plugin to your project, because it eliminates the need to run the plugin standalone.

To bind the minify goal of the Minify Maven Plugin to a phase in the build cycle, you will need to add the execution tag with the goal set to minify. Optionally, you can bind the plugin to a different build phase by using the phase option. For instance, using package in the phase option will force the minify goal to run each time this phase of the build cycle occurs.

For a complete list of the available configuration options see minify:minify goal overview page.

Merge order

The following rules for file order are applied when input CSS files are merged and minified into a single output file:

Input files defined in cssSourceFiles are merged before files defined in cssSourceIncludes.
Input files defined in cssSourceIncludes are sorted by filename before merging (see Using include/exclude patterns).
If a file is configured both in cssSourceFiles and cssSourceIncludes then only the one defined in cssSourceFiles will be processed.

The same rules for JavaScript files are applied for tags jsSourceFile and jsSourceIncludes respectively.

<project>
  <!-- ... -->
  <build>
    <plugins>
      <!-- ... -->
      <plugin>
        <groupId>com.samaxes.maven</groupId>
        <artifactId>minify-maven-plugin</artifactId>
        <version>1.7.6</version>
        <executions>
          <execution>
            <id>default-minify</id>
            <phase>package</phase><!-- When omitted defaults to 'process-resources' -->
            <configuration>
              <charset>UTF-8</charset>
              <cssSourceDir>css</cssSourceDir>
              <cssSourceFiles>
                <cssSourceFile>file-1.css</cssSourceFile>
                <!-- ... -->
                <cssSourceFile>file-n.css</cssSourceFile>
              </cssSourceFiles>
              <cssFinalFile>style.css</cssFinalFile>
              <jsSourceDir>js</jsSourceDir>
              <jsSourceFiles>
                <jsSourceFile>file-1.js</jsSourceFile>
                <!-- ... -->
                <jsSourceFile>file-n.js</jsSourceFile>
              </jsSourceFiles>
              <jsFinalFile>script.js</jsFinalFile>
              <jsEngine>CLOSURE</jsEngine>
            </configuration>
            <goals>
              <goal>minify</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <!-- ... -->
    </plugins>
  </build>
  <!-- ... -->
</project>

Invoke from the command-line

Create the project archive containing the new files.

mvn package