Maven – How to suppress maven assembly plugin skipping files that are already added? Or allow overwrite

Meanwhile, I found 2 ways of doing what I wanted.

The maven-build-helper-plugin allows to add additional entries to the list of artifacts that should be deployed:

    <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>build-helper-maven-plugin</artifactId>
         <version>1.3</version>
         <executions>
           <execution>
             <id>attach-distribution</id>
             <phase>package</phase>
             <goals>
               <goal>attach-artifact</goal>
             </goals>
             <configuration>
               <artifacts>
                 <artifact>
                   <file>target/${pom.artifactId}-${pom.version}.tar.gz</file>
                   <type>tar.gz</type>
                 </artifact>
               </artifacts>
             </configuration>
           </execution>
         </executions>
       </plugin>

The other is as simple as it gets and someone on the maven-user mailinglist pointed this out. Simple use the assembly:single goal instead of asssembly:assembly. This way the generated artifact is uploaded to the repository during the deploy phase.

    <execution>
        <id>dist-assembly</id>
        <phase>package</phase>
        <goals>
            <goal>single</goal> <!-- that's all :) -->
        </goals>
    </execution>

The info messages are coming from the Plexus Archiver. There is an open bug report on this issue:

http://jira.codehaus.org/browse/PLXCOMP-129