Grails BuildConfig for using logback instead of log4j

BuildConfig.groovy

grails.project.class.dir = "target/classes"
grails.project.test.class.dir = "target/test-classes"
grails.project.test.reports.dir = "target/test-reports"
//grails.project.war.file = "target/${appName}-${appVersion}.war"
grails.project.dependency.resolution = {
    inherits("global") {
        excludes "slf4j-log4j12"
    }
    log "warn" // log level of Ivy resolver, either 'error', 'warn', 'info', 'debug' or 'verbose'
    repositories {
        grailsPlugins()
        grailsHome()
        grailsCentral()
        mavenLocal()
        mavenCentral()
    }
    dependencies {
        // grails 1.3.7 ships with slf4j-api 1.5.8, so the latest version of logback you can use is 0.9.17
        build 'ch.qos.logback:logback-core:0.9.17', 'ch.qos.logback:logback-classic:0.9.17'
        runtime 'ch.qos.logback:logback-core:0.9.17', 'ch.qos.logback:logback-classic:0.9.17', 'org.slf4j:log4j-over-slf4j:1.5.8'
    }
}

// Remove logback-test.xml from the production WAR, so that logback.xml is used instead
grails.war.resources = { stagingDir ->
    delete(file:"${stagingDir}/WEB-INF/classes/logback-test.xml")
}