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Get environment variables

<?xml version="1.0"?> <project name="Template Buildfile" default="compile" basedir=".">   <property name="dir.src" value="src"/>   <property name="dir.build" value="build"/>   <property environment="env"/>      <target name="checkProperties">     <fail unless="env.TOMCAT_HOME">TOMCAT_HOME must be set</fail>     <fail unless="env.JUNIT_HOME">JUNIT_HOME must be set</fail>     <fail unless="env.JBOSS_HOME">JBOSS_HOME must be set</fail>   </target>   <!-- Creates the output directories -->   <target name="prepare" depends="checkProperties">     <mkdir dir="${dir.build}"/>   </target>   <target name="clean"           description="Remove all generated files.">     <delete dir="${dir.build}"/>   </target>   <target name="compile" depends="prepare"           description="Compile all source code.">     <echo>Compile code...</echo>   </target> </project>