Getting groovy, maven, and eclipse to play nice together? - eclipse

Question

So we have some unit tests written in groovy. We have the Groovy Eclipse plugin going, we have gmaven going, but the problem is that the maven eclipse plugin doesn't automatically add the src/test/groovy directory as a source directory. So, I enlisted the build-helper plugin to add a source directory, but then the problem becomes the source directory - in eclipse, the filters will include **/*.java and exclude everything else, which leads to the groovy eclipse plugin being confused. I've managed to jury-rig the problem by using the build helper to add-test-resource with the right .groovy file filter. Obviously the problem here is that is not usable if we decided to use groovy classes in the projects - the .groovy classes would be included in the .jar files.
How do I fix this?

Answer 1

I dumped gmaven in favor of the groovy-compiler-plugin, which does the groovy compiler weaving for you. With gmaven I wound up with too many weird compiler errors where stubs were missing, etc. You still need the builder-helper, and the Groovy Eclipse plugin helps in linking the source to the compiled classes, but this has worked flawlessly between working within eclipse and at the command line.
<properties>
<groovy.version>1.8.0</groovy.version>
<groovy.provider>1.7</groovy.provider>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>add-source</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>src/main/groovy</source>
</sources>
</configuration>
</execution>
<execution>
<id>add-test-source</id>
<phase>generate-test-sources</phase>
<goals>
<goal>add-test-source</goal>
</goals>
<configuration>
<sources>
<source>src/test/groovy</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.1</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
<verbose>true</verbose>
<source>1.6</source>
<target>1.6</target>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>1.8.0-03</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.5.1</version>
<exclusions>
<exclusion>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</plugin>
</plugins>
</pluginManagement>
</build>

Answer 2

We have created m2eclipse integration for Groovy-Eclipse. First, you must install m2eclipse:
http://m2eclipse.sonatype.org/sites/m2e
Then you can install the Groovy-Eclipse integration, which you can get here:
http://dist.codehaus.org/groovy/distributions/greclipse/snapshot/e3.6/
or here for Galileo:
http://dist.codehaus.org/groovy/distributions/greclipse/snapshot/e3.5/
Note that the m2eclipse integration is still beta and we appreciate feedback from users to see how well it works for them.

Answer 3

I happened to check out the maven eclipse plugin page and it turns out this type of problem is already solved:
http://maven.apache.org/plugins/maven-eclipse-plugin/examples/specifying-source-path-inclusions-and-exclusions.html
I ended up just using the build-helper-plugin to specify additional sources and added .groovy files to the source includes for the eclipse plugin.