How can I untar an artifact in maven?
===

I am a maven newbie. How do I untar an artifact to use to compile my source? 
Do I need to copy the tar file before untarring it? 

I have something like below...

Thanks
John



        <build>
          <plugins>
            <plugin>
              <artifactId>abcId</artifactId>
              <version>1</version>
              <executions>
                <execution>
                  <id>abc untar</id>
                  <phase>process-resources</phase>
                  <goals>
                    <goal>exec</goal>
                  </goals>
                  
                <configuration>
                  <executable>tar</executable>
                  <workingDirectory>???</workingDirectory>
                  <arguments>
                    <argument>xvf abc.tar</argument>
                  </arguments>
                </configuration>
                </execution>
              </executions>
            </plugin>
          </plugins>
        </build>
