Job DSL reuse - See: http://herbert.cc/blog/jenkins-job-dsl-refactoring/

job-dsl-reuse-1.groovy

job('test') {
  steps{           
    maven {
      mavenInstallation('3.3.9')       
      goals('fuu:bar')
    }      
    maven {
      mavenInstallation('3.3.9')       
      goals('compile')
    }
  }
}

job-dsl-reuse-2.groovy

job('test') {
  steps{           
    addMavenGoal delegate, 'maven-3.3.9', 'fuu:bar'
    addMavenGoal delegate, 'maven-3.3.9', 'compile'
  }
}

def addMavenGoal(context, mavenVersion, goal) { 
  context.with {
    maven {
      mavenInstallation(mavenVersion)
      goals(goal)
    }
  }
}

job-dsl-reuse-3.groovy

def maven = 'maven-3.3.9'

job('test') {
  steps{           
    addMavenGoal delegate, maven, 'fuu:bar'
    addMavenGoal delegate, maven, 'compile'
  }
}

def addMavenGoal(context, mavenVersion, goal) { 
  context.with {
    maven {
      mavenInstallation(mavenVersion)
      goals(goal)
    }
  }
}