Tycho copy-dependencies do not include plugin dependencies - maven

Question

For one plugin in my tycho reactor I would like to copy a "pure-maven" dependency and its transitive ones in a folder named "lib/".
Currently if I use the copy-dependencies goal from maven-dependency-plugin, my dependency is correctly copied but the "plugin-dependencies" resolved by tycho are also copied, and I don't want those.
Any suggestion to achieve this goal ? I'm currently using the following code snippet
<dependencies>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20140107</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>${maven.groupid}</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>process-resources</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>lib</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
Any suggestions are welcome.

Answer 1

Following this discussion on Eclipse forums it seems that we can tell maven to only include dependencies coming from the current pom.xml file using a combination of excludeScope and includeScope tags.
This updated XML snippet does the job as expected
<dependencies>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20140107</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>${maven.groupid}</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>process-resources</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>lib</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
<!-- The lines below are aimed at telling maven NOT TO COPY tycho dependencies. Do not remove those! -->
<!-- See: https://dev.eclipse.org/mhonarc/lists/tycho-user/msg05080.html -->
<excludeScope>system</excludeScope>
<includeScope>runtime</includeScope>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>