Pipeline race

build.xml

<project name="NettyProject" default="dist" basedir=".">
<property name="build-destination" value="build" />
<property name="input-artifact" value="netty-all-4.0.34.Final-SNAPSHOT.jar" />
<property name="shaded-artifact" value="netty-all-4.0.34.Final-shaded.jar" />
<target name="dist">
    <delete dir="${build-destination}" />
    <get src="https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/jarjar/jarjar-1.4.jar" dest="jarjar-1.4.jar"/>
    <taskdef name="jarjar" classname="com.tonicsystems.jarjar.JarJarTask" classpath="jarjar-1.4.jar"/>
    <jarjar jarfile="${build-destination}/${shaded-artifact}">
          <zipfileset src="${input-artifact}" excludes="META-INF/**"/>
          <rule pattern="io.netty.**" result="org.python.netty.@1"/>
    </jarjar>
    <unzip src="${input-artifact}" dest="${build-destination}" />
    <unzip src="${build-destination}/${shaded-artifact}" dest="${build-destination}" />
    <get src="http://central.maven.org/maven2/org/python/jython-standalone/2.7.1b2/jython-standalone-2.7.1b2.jar" dest="${build-destination}/jython-standalone-2.7.1b2-patched.jar"/>
    <exec dir="${build-destination}" executable="zip">
        <arg line="-r jython-standalone-2.7.1b2-patched.jar io"/>
    </exec>
    <exec dir="${build-destination}" executable="zip">
        <arg line="-r jython-standalone-2.7.1b2-patched.jar org"/>
    </exec>
</target>
</project>