java maven maven-plugin java-9 maven-checkstyle-plugin

How to exclude module-info.java from checkstyle plugin checks?

After adding module-info.java files to my project my checkstyle plugin start failing with:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check (default-cli) on project email: Failed during checkstyle configuration: NoViableAltException occurred during the analysis of file /home/xxx/IdeaProjects/blynk-server/server/notifications/email/src/main/java/module-info.java. unexpected token: module -> [Help 1]

I tried

<module name="BeforeExecutionExclusionFileFilter">
    <property name="fileNamePattern" value="module\-info\.java$"/>
</module>

However, it failed with:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check (default-cli) on project blynk: Failed during checkstyle configuration: cannot initialize module BeforeExecutionExclusionFileFilter - Unable to instantiate 'BeforeExecutionExclusionFileFilter' class, it is also not possible to instantiate it as com.puppycrawl.tools.checkstyle.checks.annotation.BeforeExecutionExclusionFileFilter

What is the correct way for skipping module-info.java files during checkstyle for maven-checkstyle-plugin?

Solution

Not sure why the Checkstyle filter is not working (this reported bug seems very similar to yours and it was fixed in version 7.3.0, so maybe you need to update Checkstyle).

Anyway the Maven excludes element is also supposed to do this:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-checkstyle-plugin</artifactId>
    <configuration>
        <excludes>**/module-info.java</excludes>
    </configuration>
</plugin>