Sounds simple and the codehaus page for the plugin makes it look even simpler. But when I ran mvn jetty:run, which should have rebuilt the entire app for me before deploying to jetty, I received this error:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project cellers: No such compiler 'groovy-eclipse-compiler'. -> [Help 1]
What bullshit. That's what you're thinking, right?
But what I missed is that when changing/adding compilers, which is effectively what you're doing here, the new compiler needs to be a dependency of the maven-compiler-plugin.
<build>
<finalName>cellers</finalName>
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>8.0.4.v20111024</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.6.0-01</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>