Ant task to use the YUI Compressor

build.xml

<?xml version="1.0"?>
<project name="YUI Compressor" default="minify" basedir=".">
	<property name="yuicompressor.lib" value=".ant/yuicompressor-2.4.6.jar" />

	<target name="minify" description="Uses the YUI Compressor engine to combine and minify CSS and JS">
		<!-- Remove the existing combined CSS or JS file that exist -->
		<delete><fileset dir="css" includes="combined.*" /></delete>
		<delete><fileset dir="js" includes="combined.*" /></delete>

		<antcall target="minifycss" />
	</target>
	
	<target name="minifycss">
		<!-- Combine all CSS files except for ones specified for IE or the content editor -->
		<concat destfile="css/combined.css">
			<fileset dir="css" includes="*.css" excludes="ie.css editor.css" />
		</concat>
		
		<!-- Minify the css -->
		<java fork="true" jar="${yuicompressor.lib}" dir="css" output="css/combined.min.css">
			<arg value="combined.css" />
		</java>
	</target>
	
	<target name="minifyjs">
		<!-- Combine all JS files -->
		<concat destfile="js/combined.js">
			<fileset dir="js" includes="*.js" />
		</concat>
		
		<!-- Minify the JS -->
		<java fork="true" jar="${yuicompressor.lib}" dir="js" output="js/combined.min.js">
			<arg value="combined.js" />
		</java>
	</target>
</project>