Auto incrementing build

_Events.groovy

eventCompileStart = { 
	def buildNumber = metadata.'app.buildNumber'
	if(!buildNumber) {
		buildNumber = 1
	} else {
		buildNumber = Integer.valueOf(buildNumber) + 1
	}
	metadata.'app.buildNumber' = buildNumber.toString()
	metadata.'app.buildDate' = new Date().format("MM/dd/yyyy HH:mm:ss")
	metadata.'app.buildProfile' = grailsEnv
	metadata.persist()
}

eventCreateWarStart = { fileName, stagingDir ->
	def metadata = grails.util.Metadata.current
	def appVersion = metadata.'app.version'
	def buildNumber = metadata.'app.buildNumber'
	def appName = metadata.'app.name'
	fileName = "${appName}-${appVersion}-${buildNumber}.war"
}

application.properties

#Grails Metadata file
#Fri Oct 14 10:17:22 EDT 2011
app.buildDate=10/14/2011 10\:17\:22
app.buildNumber=27
app.buildProfile=production
app.grails.version=1.3.7
app.name=MemberOutreachSurvey
app.servlet.version=2.4
app.version=0.1
plugins.csv=0.1
plugins.gwt=0.5.2
plugins.hibernate=1.3.7
plugins.rest=0.5
plugins.tomcat=1.3.6
plugins.xfire=0.8.1