<property
	name	= "dir.from"
	value	= "/PATH/TO/SOURCE/DIRECTORY/"
	/>
<property
	name	= "dir.to"
	value	= "/PATH/TO/TARGET/DIRECTORY/"
	/>


<target
	name	= "collateJS"
	description	= "collects JS files"
	>
	<!-- creates a timestamp - useful when someone reads the file without access to ant -->
	<tstamp>
		<format
			property		= "generated"
			pattern		= "yyyy-MM-dd HH:mm:ss"
			locale		= "en,UK"
			/>
	 </tstamp>

	<!-- clears file and puts a JS style comment on top -->
	<concat
		destfile		= "${dir.to}/concat.js"
		append		= "false"><![CDATA[//generated by ant task collateJS ${generated}

 ]]></concat>

	<!-- does the concatenating -->
	<concat
		destfile		= "${dir.to}/concat.js"
		append		= "true">
		
			<!-- list individual files manually -->
			<filelist 
			    dir	= "${dir.from}"
				>
				<file name="file1.js" />
				<file name="file2.js" />
			</filelist>
		
			<!-- creates a filter -->
			<fileset
				dir	= "${dir.from}"
				>
				<include name="**/yes*"/>
				<exclude name="**/no*"/>
			</fileset>
		</concat>
</target>

Simple file concatenation target using the concat task. The to and from directories are set in properties at the top. The first concat clears the file and writes a JS comment with the date on it, the second uses both a filelist (where you write filenames manually) and a fileset (where you just write a filter) to select the files to include.

ANT: Collate files

file

Other