<!-- Attach Demo Source Files -->

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-assembly-plugin</artifactId>

<!-- this works for assembly build, but breaks from top-level -->

<configuration>

<filters>

<filter>src/main/assembly/filter.properties</filter>

</filters>

</configuration>

<executions>

<execution>

<phase>verify</phase>

<goals>

<goal>attached</goal>

</goals>

<configuration>

<descriptors>

<descriptor>src/main/assembly/sources.xml</descriptor>

</descriptors>

</configuration>

</execution>

</executions>

</plugin>