Packaging custom javadoc doclet with maven - maven

Question

I've written my own java doclet and want to package it into a single jar file to use it later on.
I'm currently using maven with these settings to generate it:
<build>
<finalName>Doclet</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.1</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>de.test.tools.doclet.Doclet</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<!-- Maven Assembly Plugin -->
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<id>make-my-jar-with-dependencies</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>de.test.tools.doclet.Doclet</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>
Problem:
Everything is properly packaged into the jar but my sources are missing.
If I try to do a simple mvn package it tells me that the sun package doesn't exist.
error: package com.sun.javadoc does not exist
I think the last part is the main reason behind why I can't find my sources in the jar and thus my question is how I can tell maven to ignore those imports.

Answer 1

The problem is that maven cannot find package com.sun.javadoc which is in the tools.jar in the /lib folder of the java installation dir.
Eclipse was able to execute it because I added it to the classpath there but maven had no idea where he can get the resources from. So adding the following system dependency solved the problem for me:
<dependency>
<scope>system</scope>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>YOUR_JAVA_VERSION</version>
<systemPath>${java.home}/../lib/tools.jar</systemPath>
</dependency>
Replace the version with your version and make sure java home is known in your environment.
Note: This dependency doesn't work on MacOS. See: JDK tools.jar as maven dependency - Summary: Use Profiles for each OS to be able to specify the correct path.
I only need to support Linux + Windows so it is the best solution for me.