build.xml

<project name="jQuery" default="jquery" basedir=".">

	<loadfile property="version" srcfile="version.txt" />
    <property description="Folder for jquery and min target" name="dist" value="./dist" />

    <property name="JQ" value="${dist}/jquery.js" />
    <property name="JQ_MIN" value="${dist}/jquery.min.js" />
	
	<loadfile property="sizzle-exports" srcfile="src/sizzle-jquery.js" />
	
	<available property="qunit" file="test/qunit" />
	<available property="sizzle" file="src/sizzle" />
	
	<target name="qunit-clone" unless="qunit">
		<exec executable="git" outputproperty="git-qunit" >  
			<arg line="clone git://github.com/jquery/qunit.git test/qunit"/>  
		</exec>
		<echo message="git clone qunit: ${git-qunit}" />
	</target>
	<target name="qunit-pull" if="qunit">
		<exec executable="git" outputproperty="git-qunit" dir="test/qunit" >  
			<arg line="pull origin master"/>  
		</exec> 
		<echo message="git pull sizzle: ${git-qunit}" />
	</target>
	<target name="sizzle-clone" unless="sizzle">
		<exec executable="git" outputproperty="git-sizzle" >  
			<arg line="clone git://github.com/jeresig/sizzle.git src/sizzle"/>  
		</exec> 
		<echo message="git clone sizzle: ${git-sizzle}" />
	</target>
	<target name="sizzle-pull" if="sizzle">
		<exec executable="git" outputproperty="git-sizzle" dir="src/sizzle" >  
			<arg line="pull origin master"/>  
		</exec> 
		<echo message="git pull sizzle: ${git-sizzle}" />
	</target>

    <target name="jquery" depends="qunit-clone,qunit-pull,sizzle-clone,sizzle-pull" description="Main jquery build, concatenates source files and replaces @VERSION">
        <echo message="Building ${JQ}" />
    	<copy file="src/sizzle/sizzle.js" tofile="src/selector.js" overwrite="true" />
    	<replaceregexp match="// EXPOSE" replace="${sizzle-exports}" file="src/selector.js" />
        <mkdir dir="${dist}" />
        <concat destfile="${JQ}">
            <fileset file="src/intro.js" />
            <fileset file="src/core.js" />
            <fileset file="src/support.js" />
            <fileset file="src/data.js" />
            <fileset file="src/queue.js" />
            <fileset file="src/event.js" />
            <fileset file="src/selector.js" />
            <fileset file="src/traversing.js" />
            <fileset file="src/attributes.js" />
            <fileset file="src/manipulation.js" />
            <fileset file="src/css.js" />
            <fileset file="src/ajax.js" />
            <fileset file="src/effects.js" />
            <fileset file="src/offset.js" />
            <fileset file="src/dimensions.js" />
            <fileset file="src/outro.js" />
        </concat>
    	<replaceregexp match="@VERSION" replace="${version}" flags="g" byline="true" file="${JQ}" />
		<replaceregexp match="Date: " replace="Date: ${date}" file="${JQ}" />
        <echo message="${JQ} built." />
    </target>

    <target name="min" depends="jquery" description="Remove all comments and whitespace, no compression, great in combination with GZip">
        <echo message="Building ${JQ_MIN}" />
		<apply executable="java" parallel="false" verbose="true" dest="${dist}">
			<fileset dir="${dist}">
				<include name="jquery.js" />
			</fileset>
			<arg line="-jar" />
			<arg path="build/yuicompressor-2.4.2.jar" />
			<arg value="--charset" />
			<arg value="ANSI" />
			<arg value="-o" />
			<targetfile />
			<mapper type="glob" from="jquery.js" to="jquery.min.js" />
		</apply>
        <echo message="${JQ_MIN} built." />
    </target>

    <target name="clean">
        <delete dir="${dist}" />
    </target>

	<target name="openAjaxMetadata">
		<property name="target" value="openAjaxMetadata-jquery-${version}.xml" />
		<delete file="dist/jquery-*.xml" />
		<get src="http://www.exfer.net/jquery/createjQueryXMLDocs.py?version=1.3" dest="${target}" />
		<xslt includes="${target}" excludes="build.xml" destdir="./dist" style="build/style.xsl" extension=".xml" />
		<delete file="${target}" />
	</target>

</project>