Finding file ending and classifier of release artifacts in groovy using regexp

gistfile1.groovy

def fileNames = '''groovycsv-0.2-javadoc.jar.asc
groovycsv-0.2-javadoc.jar.asc
groovycsv-0.2-sources.jar.asc
groovycsv-0.2.ear.asc'''.split("\n")

def project = new Expando()
project.name = 'groovycsv'
def version='0.2'

def findClassifierPattern = /$project.name-$version(?:-(.+))?\.(\w+\.asc)/

for(filename in fileNames) {
    assert filename ==~ findClassifierPattern
    
    (filename =~ findClassifierPattern).find { full, classifier, fileEnding ->
        println "Full: $full"
        println "Classifier: $classifier"
        println "File ending: $fileEnding"
    }
}