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

Answer 1

                org.apache.maven.plugins
                maven-compiler-plugin
                3.5.1
                
                    1.7
                    1.7
                    groovy-eclipse-compiler                    
                

      
        org.codehaus.groovy
        groovy-eclipse-compiler
        2.8.0-01
      
      
        org.codehaus.groovy
        groovy-eclipse-batch
        2.1.5-03
      
             
               

See this article, it helped me to compile both java and groovy

Groovy Java compile together