void deleteOthers(List<String> pathList) {
	def prefixes = []
	for(path in pathList) {
		def currentPrefix = path;
		while(true) {
			def prefixEnd = currentPrefix.lastIndexOf("/")
			if(prefixEnd > 0) {
				currentPrefix = currentPrefix.substring(0, prefixEnd);
				prefixes.add(currentPrefix)
			} else {
				break;
			}
		}
	}
	prefixes.unique()
	
	def patterns = []
	for(path in prefixes) {
		patterns.add([
			pattern: '/' + path,
			type: 'EXCLUDE'
		])
	}
	for(path in pathList) {
		patterns.add([
			pattern: '/' + path,
			type: 'EXCLUDE'
		])
		patterns.add([
			pattern: '/' + path + '/**',
			type: 'EXCLUDE'
		])
	}
	patterns.add([
		pattern: '/**/*',
		type: 'INCLUDE'
	])
	
	
	cleanWs deleteDirs: true, patterns: patterns
	return
}

def keep = [
	'foo',
	'foo2',
	'bar/foo',
	'bar/foo2',
	'bar/foo3/bla'
]
for(path in keep) {
	dir(path) {
		writeFile file:'expected', text:''   
	}
}
writeFile file:'unexpected', text:''
writeFile file:'bar/unexpected', text:''
writeFile file:'bar/foo3/unexpected', text:''
deleteOthers(keep)

**