build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="crm-demo" default="deploy">

  <property file="build.properties" />
  <property name="target.dir" value="target" />

  <condition property="mvn.executable" value="mvn.bat" else="mvn">
    <os family="windows" />
  </condition>

  <target name="package.mvn">
    <exec executable="${mvn.executable}" dir="." failonerror="true">
      <env key="MAVEN_OPTS" value="-Xmx1024m -Xms512m" />
      <arg line="clean package" />
    </exec>
  </target>

  <target name="deploy" depends="package.mvn">
    <copy file="${target.dir}/${ant.project.name}.war" todir="${deploy.dir}" />
  </target>

</project>