src/ant/integration-test-build-pw.xml

<project basedir="."  default="build" name="build">
  <property environment="env"/>
   <property file=".build"/>  
   <!-- reading from the file properties: password_encrypted or password -->
   <property file="${source.property.path}"/>
   <property name="meta.pw" value="${env.meta.pw}"/>

   <target name="testjava">
      <echo>Ant Java/JVM  version: ${java.version}</echo> 
    </target>
   
   <target name="decrypt">
      <echo message="executing java -jar target/${jarname}.jar string dec &quot;${meta.pw}&quot; &quot;${password_encrypted}&quot;."/>
      <java jar="target/${jarname}.jar" fork="true" failonerror="true" maxmemory="128m" dir="${build.path}/../" outputproperty="decoded.pw" inputstring="">
         <arg value="string"/>
         <arg value="dec"/>
         <arg value="${meta.pw}"/>
         <arg value="${password_encrypted}"/>
         <classpath>
            <pathelement location="target/${jarname}.jar"/>
            <pathelement path="${java.class.path}"/>
        </classpath>
      </java>
    </target>
    
     <target name="encrypt">
      <echo message="executing java -jar target/${jarname}.jar string enc &quot;${meta.pw}&quot; &quot;${password}&quot;"/>
      <java jar="target/${jarname}.jar" fork="true" failonerror="true" maxmemory="128m" dir="${build.path}/../" outputproperty="encoded.pw" inputstring="">
         <arg value="string"/>
         <arg value="enc"/>
         <arg value="${meta.pw}"/>
         <arg value="${password}"/>
         <classpath>
            <pathelement location="target/${jarname}.jar"/>
            <pathelement path="${java.class.path}"/>
        </classpath>
      </java>
    </target>
  
   <target name="update">
       <echo message="updating password in property file: ${target.property.path}."/>
       <propertyfile file="${target.property.path}" >
          <entry  key="password" value="${decoded.pw}"/>
        </propertyfile>
    </target>
    
    <target name="init-update">
       <echo message="updating password_encrypted in property file: ${target.property.path}."/>
       <propertyfile file="${target.property.path}" >
          <entry  key="password_encrypted" value="${encoded.pw}"/>
        </propertyfile>
    </target>
  
  <target name="clean">
   <echo message="cleaning up key password in property file: ${target.property.path}."/>
       <propertyfile file="${target.property.path}" >
          <entry  key="password" value=""/>
        </propertyfile>
  </target>
  
    <!-- decrypt to --> 
   <target name="build" depends="testjava, decrypt, update">
  </target>
  
    <!-- encrypt to password_encrypted -->
    <target name="init" depends="testjava, encrypt, init-update">
  </target>
  
 </project>