merge multiple rundeck resource provider url contents

dependencies.txt

commons-beanutils-1.8.0.jar
dom4j-1.6.1.jar
jaxen-1.1.jar
log4j-1.2.15.jar
rundeck-core-1.3.0.jar
snakeyaml-1.7.jar

merge.groovy

import com.dtolabs.rundeck.core.common.*;
import java.util.*;
import java.net.URL;

def urls=['file:test/test.xml','file:test/test2.yaml']

//precedence based on order

def mergeprops=['tags']
def mergeattributes=true
def mnodes /*master nodes def*/
urls.each{url->
//download each url to temp file
    try{
    def f=File.createTempFile("resource","temp")
    f.deleteOnExit()
    def nurl = new URL(url);
    def text=nurl.text
    def bw=new BufferedWriter(new OutputStreamWriter(new FileOutputStream(f)))
    bw.write(text)
    bw.flush()
    bw.close()
    
    Nodes tnodes = Nodes.create(f,url.endsWith(".xml")?Nodes.Format.resourcexml:Nodes.Format.resourceyaml)
    if(null==mnodes){
        mnodes=tnodes
    }else{
        //merge nodes into mnodes
        tnodes.listNodes().each{INodeEntry e->
                System.err.println " node: ${e.nodename}"
            if(!mnodes.hasNode(e.nodename)){
                mnodes.putNode(e)
                System.err.println "Add new node: ${e.nodename}"
            }else{
                INodeEntry orig=mnodes.getNode(e.nodename)
                //merge tags
                HashSet tags=new HashSet()
                if(orig.tags){
                    tags.addAll(orig.tags)
                }
                if(e.tags){
                    tags.addAll(e.tags)
                }
                
                HashMap attrs = new HashMap()
                if(orig.attributes){
                    attrs.putAll(orig.attributes)
                }
                if(mergeattributes){
                    attrs.putAll(e.attributes)
                }
                // create updated master node
                NodeEntryImpl node = new NodeEntryImpl()
                ['nodename','hostname','description','osFamily','osVersion','osArch','osName','username'].each{ nprop->
                    node[nprop]=orig[nprop]
                }
                node.tags=tags
                node.attributes=attrs
                mnodes.putNode(node)
                System.err.println "merge node: ${e.nodename}: ${e}"
            }
        }
    }
    }catch(Exception e){
        System.err.println "Error loading from url ${url}: ${e}"
    }
}

System.out.println "Loaded ${urls.size()} URLs: "
def gen=new NodesYamlGenerator(System.out)
gen.addNodes(mnodes.listNodes())
gen.generate()
//System.out.println mnodes.toString()