import groovy.xml.MarkupBuilder

/**
 * Produces xml file that has no whitespace character.
 *
 * new IndentPrinter(out, "", false) section does all things we need to do.
 *
 * Example output:
 * <products><product><title>product title</title><price>100</price></product></products>
 *
 */
def writeXMLWithoutWhitespaces(String filePath) {
    new File(filePath).withWriter { out ->
        MarkupBuilder xml = new MarkupBuilder(new IndentPrinter(out, "", false))
        xml.products {
            product {
                title("product title")
                price("100")
            }
        }
    }
}