Maven compile mixed Java + Groovy 1.7 project, using gmaven-plugin

Question

As per the top two answers in: maven dependencies groovy. I'm trying to compile a mixed Java 6 + Groovy project with Maven, using the GMaven-plugin from org.codehaus.gmaven. Up until yesterday we were using the old 1.6.0 version of Groovy (never changed it after we finally got it working), but since 1.7.0 is now stable I thought we'd switch to that.

If only things were that simple.. The problems I'm now encountering seem to be two fold:

• Groovy 1.6 is somehow still picked up as the default. (as show in the stacktrace below)
• groovy:generateStubs stops with a build error: Unexpected node: Node[7:1,64,ANNOTATIONS]

Does anyone know how to solve the above two problems, or can provide a working pom to compile Java 6 code intermixed with Groovy 1.7 code with Maven?

There's a lot of confusing / contradicting / outdated documentation on compiling old versions of Groovy using gmaven / groovy.maven / groovy.maven.gmaven that's really not helping things right now..

For reference, here's part of my pom.xml & the Maven -e output:

<dependencies>
    <dependency>
        <groupId>org.codehaus.groovy</groupId>
        <artifactId>groovy-all</artifactId>
        <version>1.7.0</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.gmaven</groupId>
            <artifactId>gmaven-plugin</artifactId>
            <version>1.2</version>
            <dependencies>
                <dependency>
                    <groupId>org.codehaus.gmaven.runtime</groupId>
                    <artifactId>gmaven-runtime-1.7</artifactId>
                    <version>1.2</version>
                </dependency>
                <dependency>
                    <groupId>org.codehaus.groovy</groupId>
                    <artifactId>groovy-all</artifactId>
                    <version>1.7.0</version>
                </dependency>
            </dependencies>
            <executions>
                <execution>
                    <goals>
                        <goal>generateStubs</goal>
                        <goal>compile</goal>
                        <goal>generateTestStubs</goal>
                        <goal>testCompile</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

Stacktrace:

[INFO] ------------------------------------------------------------------------
[INFO] Building Client
[INFO]    task-segment: [clean, package]
[INFO] ------------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] [groovy:generateStubs {execution: default}]
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Unexpected node: Node[7:1,64,ANNOTATIONS]

[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Unexpected node: Node[7:1,64,ANNOTATIONS]
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
        at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: Unexpected node: Node[7:1,64,ANNOTATIONS]
        at org.codehaus.gmaven.plugin.MojoSupport.execute(MojoSupport.java:85)
        at org.codehaus.gmaven.plugin.stubgen.AbstractGenerateStubsMojo.execute(AbstractGenerateStubsMojo.java:60)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
        ... 17 more
Caused by: org.codehaus.gmaven.runtime.support.stubgen.UnexpectedNodeException: Unexpected node: Node[7:1,64,ANNOTATIONS]
        at org.codehaus.gmaven.runtime.support.stubgen.parser.NodeSupport.ensure(NodeSupport.java:96)
        at org.codehaus.gmaven.runtime.support.stubgen.model.ModelFactorySupport.identifier(ModelFactorySupport.java:896)
        at org.codehaus.gmaven.runtime.support.stubgen.model.ModelFactorySupport.importDef(ModelFactorySupport.java:185)
        at org.codehaus.gmaven.runtime.support.stubgen.model.ModelFactorySupport.process(ModelFactorySupport.java:122)
        at org.codehaus.gmaven.runtime.support.stubgen.model.ModelFactorySupport.create(ModelFactorySupport.java:90)
        at org.codehaus.gmaven.runtime.support.stubgen.model.ModelFactorySupport.create(ModelFactorySupport.java:61)
        at org.codehaus.gmaven.runtime.v1_6.StubCompilerFeature$StubCompilerImpl.render(StubCompilerFeature.java:101)
        at org.codehaus.gmaven.runtime.v1_6.StubCompilerFeature$StubCompilerImpl.compile(StubCompilerFeature.java:90)
        at org.codehaus.gmaven.plugin.stubgen.AbstractGenerateStubsMojo.compile(AbstractGenerateStubsMojo.java:160)
        at org.codehaus.gmaven.plugin.stubgen.AbstractGenerateStubsMojo.process(AbstractGenerateStubsMojo.java:131)
        at org.codehaus.gmaven.plugin.ComponentMojoSupport.doExecute(ComponentMojoSupport.java:60)
        at org.codehaus.gmaven.plugin.MojoSupport.execute(MojoSupport.java:69)
        ... 20 more

Solution 1

I had the same problem. I was missing the providerSelection configuration setting for 1.7.

Try this configuration and it should work for you.

  <plugin>
      <groupId>org.codehaus.gmaven</groupId>
      <artifactId>gmaven-plugin</artifactId>
      <version>1.2</version>
      <configuration> 
        <providerSelection>1.7</providerSelection> 
      </configuration> 
      <dependencies>
          <dependency>
            <groupId>org.codehaus.gmaven.runtime</groupId>
            <artifactId>gmaven-runtime-1.7</artifactId>
            <version>1.2</version>
            <exclusions>
              <exclusion>
                <groupId>org.codehaus.groovy</groupId>
                <artifactId>groovy-all</artifactId>
              </exclusion>
            </exclusions>
          </dependency>
          <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>1.7.0</version>
          </dependency>
      </dependencies>
      <executions>
          <execution>
              <goals>
                  <goal>generateStubs</goal>
                  <goal>compile</goal>
                  <goal>generateTestStubs</goal>
                  <goal>testCompile</goal>
              </goals>
          </execution>
      </executions>
  </plugin>

Solution 2

That works for me as well with one small addition:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.5</source>
                <target>1.5</target>
            </configuration>
        </plugin>

Maybe there is a way to make this the default?