How to copy unversioned test resources during release:perform?

My Question is very similar to "Maven doesn't copy untracked resources while releasing". I have test resources which are not under version control. As testing is part of release:perform that fails without those resources.

How can I tell Maven to copy those unversioned test resources into target/checkout/target/test-classes/. I really would prefer not to skip testing. Those test resource won't come into the public vcs as they have credentials for a webservice.

Solution

There seems to be many ways to achieve this. One way is with the maven-resources-plugin and a profile. The release-plugin sets during release:perform the profile release-plugin. You simply have add the maven-resources-plugin into that profile (or a custom profile which is activated by <releaseProfiles>).

<plugin>
    <artifactId>maven-resources-plugin</artifactId>
    <version>2.6</version>
    <executions>
        <execution>
            <id>copy-resources</id>
            <phase>validate</phase>
            <goals>
                <goal>copy-resources</goal>
            </goals>
            <configuration>
                <outputDirectory>${project.build.directory}/test-classes</outputDirectory>
                <resources>
                    <resource>
                        <directory>${basedir}/../../src/test/resources/</directory>
                    </resource>
                </resources>
            </configuration>
        </execution>
    </executions>
</plugin>

With org.sonatype.oss:oss-parent it's a bit different, as that parent disables <useReleaseProfile> but uses sonatype-oss-release.