Maven assembly plugin - multiple descriptors?

Question

The goal is to create a single ZIP file, but split the configuration of the Maven Assembly plugin into a general and more specific descriptor.

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>3.0.0</version>
    <configuration>
        <descriptors>
            <descriptor>${project.basedir}/../src/assembly/rest-executables.xml</descriptor>
            <descriptor>${project.basedir}/../../src/assembly/deliverables.xml</descriptor>
        </descriptors>
    </configuration>
    <executions>
        <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
                <goal>single</goal>
            </goals>
        </execution>
    </executions>
</plugin>

However, when the two custom descriptors have unique IDs, two ZIP files are created - each with the expected contents. When the IDs are identical, only the last descriptor is executed (or it overwrites the previous contents).

Is what I'm attempting not possible or am I missing an option somewhere like 'append to existing ZIP' rather than 'always create new ZIP'?

Would component descriptors work for your use case? It allows splitting config into multiple files, then using the components in one or more descriptors. — user944849
Cause you are using things like /../.. etc. which looks like you have the descriptors somewhere else than the current project needs them.... — khmarbaise

Mike Mike · Accepted Answer · 2020-01-09T15:07:00

I was able to reproduce the issue and fixed it by for removing inner descriptor tags

<configuration>
    <descriptors>${project.basedir}/../src/assembly/rest-executables.xml,${project.basedir}/../../src/assembly/deliverables.xml</descriptors>
</configuration>

It started to produce artifacts as expected. After reverting inner elements back I was not able to reproduce the issue.

Maven assembly plugin - multiple descriptors?

1 Answers