question: private void copyAppConfigFiles ( File appBuildDir , File appConfigDir ) throws IOException { File [ ] files = appConfigDir . listFiles ( ) ; if ( files != null ) { appBuildDir . mkdirs ( ) ; for ( File file : files ) { File outFile = new File ( appBuildDir , file . getName ( ) ) ; if ( file . isDirectory ( ) ) { copyAppConfigFiles ( outFile , file ) ; } else { Files . copy ( file , outFile ) ; } } } }
target:  Copies any local configuration files into the app directory