[tycho-user] Dependencies of type 'pom' not recognized when creating fea

[martin.nilsson@xxxxxxxxxxx]

Hello

When I try to build features out of
my eclipse-plugins (which also are maven artifacts) I can't have any dependency
references to pom artifacts, i.e. artifacts that only aggregates dependencies
to other maven artifacts.

I have a small example to show my problem:

POM-reference artifact:
<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>my.example</groupId>
  <artifactId>pom-reference</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>pom-reference</name>
  <dependencies>
    <dependency>
      <groupId>com.google.collections</groupId>
      <artifactId>google-collections</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>
</project>

Eclipse-plugin:
<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">
  <modelVersion>4.0.0</modelVersion>
  <groupId>my.example</groupId>
  <artifactId>plug1n</artifactId>
  <packaging>jar</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>plug1n</name>
  <dependencies>
    <dependency>
      <groupId>my.example</groupId>
      <artifactId>pom-reference</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <type>pom</type>
    </dependency>
  </dependencies>
  <build>
    <pluginManagement>
...
    </pluginManagement>
    <plugins>
...
    </plugins>
  </build>
</project>

Eclipse-feature:
<?xml
version="1.0"
encoding="UTF-8"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>my.example</groupId>
  <artifactId>fe4ture</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>eclipse-feature</packaging>
  <dependencies>
    <dependency>
      <groupId>my.example</groupId>
      <artifactId>plug1n</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>
  </dependencies>
  <repositories>
...
  </repositories>
  <pluginRepositories>
...
  </pluginRepositories>
  <build>
    <pluginManagement>
...
    </pluginManagement>
    <plugins>
...
    </plugins>
  </build>
</project>

When building the eclipse feature with
maven I get the following error:

[INFO] Scanning for projects...
[WARNING] No explicit target runtime
environment configuration. Build is platform dependent.
[INFO] Resolving target platform for
project MavenProject: my.example:fe4ture:0.0.1-SNAPSHOT @ C:\Dev\eclipse\ws-modeling-indigo\my.example.feature\pom.xml
[ERROR] Internal error: java.lang.IllegalArgumentException:
Unknown type of packaging pom -> [Help 1]
org.apache.maven.InternalErrorException:
Internal error: java.lang.IllegalArgumentException: Unknown type of packaging
pom
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:168)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: java.lang.IllegalArgumentException:
Unknown type of packaging pom
        at org.eclipse.tycho.p2.impl.publisher.P2GeneratorImpl.getPublisherActions(P2GeneratorImpl.java:178)
        at org.eclipse.tycho.p2.impl.publisher.AbstractMetadataGenerator.generateMetadata(AbstractMetadataGenerator.java:58)
        at org.eclipse.tycho.p2.impl.publisher.P2GeneratorImpl.generateMetadata(P2GeneratorImpl.java:106)
        at org.eclipse.tycho.p2.impl.resolver.P2ResolverImpl.addMavenArtifact(P2ResolverImpl.java:181)
        at org.eclipse.tycho.p2.facade.P2TargetPlatformResolver.doResolvePlatform(P2TargetPlatformResolver.java:252)
        at org.eclipse.tycho.p2.facade.P2TargetPlatformResolver.resolvePlatform(P2TargetPlatformResolver.java:150)
        at org.eclipse.tycho.core.resolver.DefaultTychoDependencyResolver.resolveProject(DefaultTychoDependencyResolver.java:90)
        at org.eclipse.tycho.core.maven.TychoMavenLifecycleParticipant.afterProjectsRead(TychoMavenLifecycleParticipant.java:91)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:273)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        ... 11
more

But if I replace the dependecy to the
pom artifact with a dependency to a jar artifact the build is successful.

My question is if I have missed something
in my configuration of these three projects or if it is as-designed (and
me missing out on some information)?

With best regards,

Martin

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