laravel5/vendor/sebastian/recursion-context/build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="recursion-context" default="setup">
 <target name="setup" depends="clean,composer"/>

 <target name="clean" description="Cleanup build artifacts">
  <delete dir="${basedir}/vendor"/>
  <delete file="${basedir}/composer.lock"/>
 </target>

 <target name="composer" depends="clean" description="Install dependencies with Composer">
  <exec executable="composer" taskname="composer">
   <arg value="update"/>
   <arg value="--no-interaction"/>
   <arg value="--no-progress"/>
   <arg value="--no-ansi"/>
   <arg value="--no-suggest"/>
   <arg value="--optimize-autoloader"/>
   <arg value="--prefer-stable"/>
  </exec>
 </target>
</project>