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Running OpenRewrite on a multi-module Maven project

If you have a Maven project with multiple modules, you may run into errors finding and running the OpenRewrite Maven plugin.

There is currently an open issue to better support multi-module Maven projects that you can +1 on if you'd like.

In the meantime, one way to work around this is to add a profile on the parent POM:

pom.xml
<profile>
  <id>openrewrite</id>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>5.47.0</version>
        <configuration>
          <activeRecipes>
            <recipe>org.openrewrite.staticanalysis.CodeCleanup</recipe>
          </activeRecipes>
          <failOnDryRunResults>true</failOnDryRunResults>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-static-analysis</artifactId>
            <version>1.22.0</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</profile>

You can then run OpenRewrite from any submodule using this command: mvn -Popenrewrite rewrite:run.

There's no need to set the configLocation for the default location of rewrite.yml. The default value is ${maven.multiModuleProjectDirectory}/rewrite.yml, which works in multi module projects. More information about the various configuration options can be found in the mojo docs