Overwriting resources during maven war overlay

As I've gathered, maven-war-plugin never overwrites files which already exist in the target of an overlay. For example, if I have a war A which has a dependency on a war B, both of which conta开发者_Go百科in some resource located at src/main/resources/some.xml, the resulting A.war will contain the some.xml from the A project.

How do I instruct the maven-war-plugin to favor the resources from the dependency (B) over the original ones (A)?

See http://maven.apache.org/plugins/maven-war-plugin/overlays.html:

"For instance if the index.jsp file of the overlay my-webapp must be set in the webapp but other files can be controlled the regular way, define two overlay configurations for my-webapp"

    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <version>2.3</version>
    <configuration>
      <overlays>
        <overlay>
          <id>my-webapp-index.jsp</id>
          <groupId>com.example.projects</groupId>
          <artifactId>my-webapp</artifactId>
          <includes>
            <include>index.jsp</include>
          </includes>
        </overlay>
        <overlay>
          <!-- empty groupId/artifactId represents the current build -->
        </overlay>
         ...
      </overlays>
    </configuration>

Guess that's not the final desicion, but a point to start at.

You can use maven-resources plugin to copy a file to the desired location. Before or after a war has been built.