CODEWITHSUNDEEP
mavendependenciesmaven-assembly-pluginmulti-module
Jim
Jim

Reputation: 161

how to tell maven assembly on a submodule to include only dependencies this module needs?

I am working on a multi-module maven project with these modules

parent
  |-- restful    // this is a jersey restful service as a WAR
  |-- shared     // some stuff shared by all other modules as a jar
  |-- cl-client  // a commandline client to the restful service, needs assembly

The parent pom.xml uses dependencyManagement to list all dependencies used by all modules

The pom for cl-client includes the assembly plugin, configured to be executed at the package phase:

    <plugin>
      <artifactId>maven-assembly-plugin</artifactId>
      <version>2.4</version>
      <executions>
        <execution>
          <id>distro-assembly</id>
          <phase>package</phase>
          <goals>
            <goal>single</goal>
          </goals>
          <configuration>
            <descriptors>
              <descriptor>src/main/assembly/assembly.xml</descriptor>
            </descriptors>
          </configuration>
        </execution>
      </executions>
    </plugin>

and the assembly.xml is as follows:

<assembly>
  <id>commandlinable</id>
  <formats>
    <format>dir</format>
  </formats>
  <includeBaseDirectory>false</includeBaseDirectory>
  <moduleSets>
    <moduleSet>
      <useAllReactorProjects>true</useAllReactorProjects>
      <includes>
        <include>my:cl-client</include>
      </includes>
      <binaries>
        <outputDirectory>${artifactId}</outputDirectory>
        <unpack>true</unpack>
        <dependencySets>
          <dependencySet>
            <outputDirectory>${artifactId}/lib</outputDirectory>
            <useProjectArtifact>true</useProjectArtifact>
            <unpack>false</unpack>
            <scope>runtime</scope>
          </dependencySet>
        </dependencySets>
      </binaries>
    </moduleSet>
  </moduleSets>
</assembly>

When I run mvn package, the cl-client modules assembles fine and does create the directory that I hoped for, but the only problem is that all dependencies jars are copied in the lib/ directory, even the ones that are only used by the "restful" module such as jersey related jars. I tried to flip the useProjectArtifact flag, but it didn't seem to make any difference.

So I am just wondering if there is anyway I can tell Maven assembly to include only the jars required by the cl-client module. I poured through quite a few online resources on Maven assembly on multi-module projects, but wasn't able to get any clear answers.

Upvotes: 1

Views: 2876

Answers (1)

Duncan Jones
Duncan Jones

Reputation: 69389

Use the mvn dependency:tree command to understand which dependencies exist between your modules. You'll probably discover an artifact has a transitive dependency on jersey, which is why it's being included.

Upvotes: 1

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