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Posted to dev@maven.apache.org by "David J. M. Karlsen" <da...@davidkarlsen.com> on 2007/11/12 19:11:36 UTC

Getting hold of compile classpath in an Ant task

Hi!

I've followed the guide at:
http://maven.apache.org/guides/plugin/guide-ant-plugin-development.html

Unfortunately this guide does not show how to get hold of the 
compile-classpath defined by the maven project model.

After some surfing i stumbled upon maven-ant-tasks which is supposed to 
be capable of this.

Adding this dependency ends up in:

[ERROR] FATAL ERROR
[INFO] 
------------------------------------------------------------------------
[INFO] org.apache.maven.script.ant.AntMojoComponentFactory cannot be 
cast to org.codehaus.plexus.component.factory.Compo
nentFactory
[INFO] 
------------------------------------------------------------------------
[INFO] Trace
java.lang.ClassCastException: 
org.apache.maven.script.ant.AntMojoComponentFactory cannot be cast to 
org.codehaus.plexus.
component.factory.ComponentFactory
         at 
org.codehaus.plexus.component.factory.DefaultComponentFactoryManager.findComponentFactory(DefaultComponentFac
toryManager.java:68)
         at 
org.codehaus.plexus.DefaultPlexusContainer.createComponentInstance(DefaultPlexusContainer.java:1457)
         at 
org.codehaus.plexus.component.manager.AbstractComponentManager.createComponentInstance(AbstractComponentManag
er.java:93)
         at 
org.codehaus.plexus.component.manager.PerLookupComponentManager.getComponent(PerLookupComponentManager.java:4
8)
         at 
org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:331)
         at 
org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:440)
         at 
org.apache.maven.plugin.DefaultPluginManager.getConfiguredMojo(DefaultPluginManager.java:562)
         at 
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:421)
         at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
         at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:48
0)
         at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459)
         at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.jav
a:311)
         at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
         at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
         at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:334)
         at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:125)
         at org.apache.maven.cli.MavenCli.main(MavenCli.java:280)
         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.classworlds.Launcher.launchEnhanced(Launcher.java:315)
         at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
         at 
org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
         at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO] 
------------------------------------------------------------------------
[INFO] Total time: 4 seconds
[INFO] Finished at: Mon Nov 12 18:47:24 CET 2007
[INFO] Final Memory: 12M/22M
[INFO] 
------------------------------------------------------------------------

My questions are:
1) Is maven-plugin-plugin + maven-plugin-tools-ant still the preferred 
way to develop ant-based maven plugins?
2) How can I reference the compile classpath as defined by maven in my 
ant-tasks?
3) If 2 is by using maven-ant-tasks - how? (As it fails as described above).



-- 
David J. M. Karlsen - +47 90 68 22 43
http://www.davidkarlsen.com
http://mp3.davidkarlsen.com

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