How to merge 2 groovy config files that are in the form of groovy scripts?

I want to combine 2 groovy config files. Is there a way to write to the groovy config file? Suppose I create a temp config file that only contains changes (add / modify) and then add it or modify the target config file (not sure if there is a config script in groovy to change existing entries in the groovy config file.)

Or is there another way? Please, help

Example target groovy config file

config {
    name="agnis"
    master {
        name="Altis"
        bitMode = 64
    }
    slave {
        name="Geo"
        bitMode = 64            
    }
}

datastore{
    host="localhost"
    port=12808
    dbname="gcsapp"
    users_collection="users"    
}

defaultBookmarks{
    track_url="http://apps1.alto.com/Scripts/Texcel/track.out"
    vmware_url="https://example.com/ControlPanel/Configurations/AllConfigurations.aspx"
}

      

        
        
        
      

    

Example temp config file that contains only changes

config {
    master {
        name="Ajanta"
        bitMode = 32
    }
    slave {
        name="Galileo"
        bitMode = 32            
    }
}

      

        
        
        
      

    

Working code

private boolean mergeFiles(def sourceFile, def targetFile) {
    try {
        def srcConfig = new ConfigSlurper().parse(new File(sourceFile).toURI().toURL())
        def tgtConfig = new ConfigSlurper().parse(new File(targetFile).toURI().toURL())
        ConfigObject mergedConfig = (ConfigObject) tgtConfig.merge(srcConfig)

        def stringWriter = new StringWriter()
        mergedConfig.writeTo(stringWriter)

        def file = new File(targetFile)
        file.write(stringWriter.toString())
    } catch(Exception e) {
        println e.printStackTrace()
        return false
    }       
    return true
}