def ant = new AntBuilder();   // create an antbuilder
def contentJar = "target/site/content.jar"
def contentDir = "target/content.jar/"
println 'unzipping content.jar'
ant.unzip(  src: contentJar, dest:contentDir,  overwrite:"true")
println ' Doing some black magic'
def contentJar2 = "target/site/content2.jar"

File contentXml =  new File(contentDir, "content.xml")
def root = new XmlParser().parseText(contentXml.text)

def feature = root.units.unit.find{ it.@id=="org.eclipse.m2e.wtp.feature.feature.group"}
def version = feature.@version
println "found " + feature.@id + '-' + version

def matchDefinition = "providedCapabilities.exists(pc | pc.namespace == 'org.eclipse.equinox.p2.iu' && (pc.name == 'org.maven.ide.wtp' || pc.name == 'org.eclipse.m2e.wtp' && pc.version > '${version}'))"
println matchDefinition

feature.update.@match = matchDefinition

def writer = new StringWriter()
new XmlNodePrinter(new PrintWriter(writer)).print(root)
contentXml.write(writer.toString())

println 'zipping customized content.jar'
ant.zip(  destFile: contentJar2, baseDir:contentDir)