Maven : OSGI, bundles and multi-modules projects - maven-2

Question

I'm currently developing an OSGi based application (using Equinox) by trying to mavenize a web tutorial I've found on OSGi+Equinox. In this project, there are bundles depending on other bundles (quote-service depends on quote).
The compile phase does succeed, but the package phase does not. Maven complains the following :
[INFO] [bundle:bundle]
[ERROR] Error building bundle de.vogella.osgi:quote-service:bundle:0.0.1 : Unresolved references to [de.vogella.osgi.quote] by class(es) on the Bundle-Classpath[Jar:dot]: [de/vogella/osgi/quoteservice/Activator.class, de/vogella/osgi/quoteservice/QuoteService.class]
[ERROR] Error(s) found in bundle configuration
I do understand the problem, but do not see how to make it work.
This is the quote's pom :
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd">
<parent>
<artifactId>osgi-first-app</artifactId>
<groupId>de.vogella.osgi</groupId>
<version>0.0.1</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>de.vogella.osgi</groupId>
<artifactId>quote</artifactId>
<packaging>bundle</packaging>
<name>Quote Bundle</name>
<version>0.0.1</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>1.4.3</version>
<extensions>true</extensions>
<configuration>
<instructions>
<_include>src/main/resources/META-INF/MANIFEST.MF</_include>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
and the quote's bundle manifest :
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Quote Plug-in
Bundle-SymbolicName: de.vogella.osgi.quote
Bundle-Activator: de.vogella.osgi.quote.Activator
Bundle-ActivationPolicy: lazy
Bundle-RequiredExecutionEnvironment: J2SE-1.5
Import-Package: org.osgi.framework;version="1.3.0"
Export-Package: de.vogella.osgi.quote
Then the quote-service's pom :
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd">
<parent>
<artifactId>osgi-first-app</artifactId>
<groupId>de.vogella.osgi</groupId>
<version>0.0.1</version>
</parent>
<dependencies>
<dependency>
<groupId>de.vogella.osgi</groupId>
<artifactId>quote</artifactId>
<version>0.0.1</version>
<type>bundle</type>
</dependency>
</dependencies>
<modelVersion>4.0.0</modelVersion>
<groupId>de.vogella.osgi</groupId>
<artifactId>quote-service</artifactId>
<packaging>bundle</packaging>
<name>Quote Service Bundle</name>
<version>0.0.1</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>1.4.3</version>
<extensions>true</extensions>
<configuration>
<instructions>
<_include>src/main/resources/META-INF/MANIFEST.MF</_include>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
And finally the quote-service's manifest :
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Quoteservice Plug-in
Bundle-SymbolicName: de.vogella.osgi.quoteservice
Bundle-Activator: de.vogella.osgi.quoteservice.Activator
Bundle-ActivationPolicy: lazy
Bundle-RequiredExecutionEnvironment: J2SE-1.5
Import-Package: org.osgi.framework;version="1.3.0", \
de.vogella.osgi.quote;version="0.0.1"
Is there something wrong ? Thank you in advance !

Answer 1

The answer is quite simple : I removed the already defined manifest, and used bnd entries in the bundle plugin instructions. That works !

Answer 2

Tycho is designed to handle these types of problems.

Answer 3

I wrote a tool called auto-builder: http://code.google.com/p/auto-builder. It introspects PDE-based projects and generates Ant build files; it supports transitive closure over dependencies and all that jazz.
I posted a write-up: http://empty-set.net/?p=9. I wrote it because the Maven tools I played with, when integrated with PDE, didn’t “just work.” Basically, I wanted to do coding in PDE and have a Hudson-based CI without any fuss in between.
Generating Ant files is nice because it gives you all the benefits of a declarative build tool, but it leaves you with a procedural description of what it is doing.
I am looking for more PDE-based projects to test it on. There are a couple RFC-0112 Bundle repositories around, and I have some code for downloading dependencies. If anyone is interested, then I could integrate dependencies download with auto-builder.