Maven: Extract dependency resources before test - maven

Question

I have a multimodule Maven project. One subproject hosts XSL/XML resource files. The other project hosts Java code that needs to use these files in its unit tests.
In the dependency's jar, the resources lie in the folder xml-resources.
I found this example and tried to change it for my needs:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>resource-dependencies</id>
<phase>process-test-resources</phase>
<goals>
<goal>unpack-dependencies</goal>
</goals>
<configuration>
<classifier>xml-resources</classifier>
<outputDirectory>${project.build.directory}/classes/xml-resources</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
This doesn't do anything when I run the process-test-resources phase. Am am sure that there are some errors in there - I do not see where I can specify the dependency the resources should be taken from, and <classifier> does not seem to actually specify the source where the resources should be copied from.
I'm lost here, can somebody tell me how to do this right?

Answer 1

Try something like this
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>resource-dependencies</id>
<phase>process-test-resources</phase>
<goals>
<goal>unpack-dependencies</goal>
</goals>
<configuration>
<includeArtifactIds>my-artifact-id</includeArtifactIds>
<includes>foobar.txt, loremipsum.xml</includes>
<outputDirectory>${project.build.directory}/classes/xml-resources</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
Have a look at the unpack-dependencies parameters for detailed explanation or further information.