Make it work on modules of a project

Imagine that I have a project with several modules. I'd like to run jdiff in one of the modules. This module doesn't have a different release cycle than the project and thus doesn't have a trunk, branches and tags SCM urls. Only the project has.

The <scm> of this module is:

  <scm>
    <connection>scm:svn:svn://svn.codehaus.org/cargo/cargo/trunk/core/api/container</connection>
    <url>http://svn.cargo.codehaus.org/</url>
  </scm>

The reporting section is

  <reporting>
    <plugins>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>jdiff-maven-plugin</artifactId>
        <configuration>
          <oldTag>0.8</oldTag>
        </configuration>
      </plugin>
    </plugins>
  </reporting>

When I execute the jdiff plugin it tries to checkout from svn://svn.codehaus.org/cargo/cargo/trunk/core/api/tags/0.8 which doesn't exist. The correct SVN url should be: svn://svn.codehaus.org/cargo/cargo/tags/0.8/core/api/container/.

I can't figure a way to make the jdiff plugin use this url, even if I use svnTagBase.

One solution would be to look for "trunk" and replace it with "tags/$

" and also offer a generic solution by proposing a <scmTemplateUrl> where the tag would be represented by some token (say @TAG@). Users would be able to write:

<scmTemplateUrl>svn://svn.codehaus.org/cargo/cargo/tags/@TAG@/core/api/container/</scmTemplateUrl>

Thanks