Use checkstyle configuration from plugin when generating eclipse files from maven - eclipse

Question

I have a common artifact where I store build-tools configuration files, e.g. checkstyle, pmd etc.
I can access the files and everything works as expected when I run from the console. The configuration files are included in my project and the reports are generated as expected when I run mvn site from the console.
However, files that are required by eclipse and should be included when mvn eclipse:eclipse is run are not to be found. I got an error telling me that the files cannot be found.
This is the important part of my POM.xml file:
<build>
<extensions>
<extension>
<groupId>com.foo</groupId>
<artifactId>build-tools</artifactId>
<version>1.0</version>
</extension>
</extensions>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<additionalBuildcommands>
<buildcommand>net.sf.eclipsecs.core.CheckstyleBuilder</buildcommand>
</additionalBuildcommands>
<additionalProjectnatures>
<projectnature>net.sf.eclipsecs.core.CheckstyleNature</projectnature>
</additionalProjectnatures>
<additionalConfig>
<file>
<name>.checkstyle</name>
<location>${basedir}/eclipse-checkstyle.xml</location>
</file>
</additionalConfig>
</configuration>
</plugin>
</plugins>
</build>
So my question is how to get maven to understand that these files, which is located in my build-tools artifact, to be included when I run the eclipse:eclipse command?
EDIT: It is the eclipse-checkstyle.xml that cannot be found.

Answer 1

You should add the jar holding the relevant sources as a dependency of the plugin, not an extention:
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
...
</configuration>
<dependencies>
<dependency>
<groupId>com.foo</groupId>
<artifactId>build-tools</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
</plugin>
</plugins>