Dependencies In Same Reactor - tycho

Question

I have a very simple Tycho reactor with two modules: one is a standard Maven project with this addition to make it a bundle:
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<executions>
<execution>
<id>default-bundle</id>
<phase>package</phase>
<goals>
<goal>bundle</goal>
</goals>
<configuration>
<instructions>
<Export-Package>org.acme.jar</Export-Package>
</instructions>
<manifestLocation>META-INF</manifestLocation>
</configuration>
</execution>
</executions>
</plugin>
The second is a Tycho project that has a dependency to the above JAR in the MANIFEST.MF.
If I start the build, I get the following exception:
[ERROR] Cannot resolve project dependencies:
[ERROR] Software being installed: plugin 0.0.1.qualifier
[ERROR] Missing requirement: plugin 0.0.1.qualifier requires 'bundle org.acme.jar 0.0.1' but it could not be found
Which is really weird, because the bundle is in the same reactor.
But no worries, I can just add the Maven dependency, too:
<!-- parent pom.xml -->
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>target-platform-configuration</artifactId>
<version>0.26.0</version>
<configuration>
<pomDependencies>consider</pomDependencies>
</configuration>
</plugin>
<!-- plug-in pom.xml -->
<dependencies>
<dependency>
<groupId>org.acme</groupId>
<artifactId>jar</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
Still I get the same exception, which is weird because the documentation claims: Maven resolves the GAV dependencies according to the normal Maven rules.
That's just not true. Evidently org.acme.jar doesn't get resolved. Or maybe Tycho fails to see that it's a bundle.
The JAR module is an API project used for server side components, and we want to drop SWT / Tycho in the long run, so it's not an option to make org.acme.jar an Eclipse plug-in.
How do I define dependencies in the same reactor for Tycho?

Answer 1

I’m afraid that what you ask for is currently not possible. The Tycho Wiki documents this limitation in the dependency on pom-first artifacts HOW-TO.
That being said, if you really want your whole build (maven-bundle-plugin and Tycho parts) to run with a single mvn clean install, then using the maven-invoker-plugin at the end of the “plain Maven” build to fork a “Tycho build” should work. It’s a rather cumbersome workaround, however (example on Github).