Hi,
how do I get a self developed plugin to work?
- I followed
http://maven.apache.org/guides/plugin/guide-java-plugin-development.html
- made a jar
- used "mvn install:install-file ..." to add the jar/plugin to the local
repository. It says "Installing ...", "BUILD SUCESSFULL"
- tried to run the plugin with the fully qualified goal
groupID:artifactID:version:goal (of course subtitued with the actual values)
but I only get an NPE:
---------------------------------------------------------------
D:\tmp>mvn -X -e <groupID>:ClassNamePrinterPlugin:0.8:PrintClassNames
+ Error stacktraces are turned on.
[DEBUG] Building Maven user-level plugin registry from:
'C:\xxx\.m2\plugin-registry.xml'
[DEBUG] Building Maven global-level plugin registry from:
'd:\PROGRA~1\APACHE~1.0\bin\..\conf\plugin-registry.xml'
[INFO] Scanning for projects...
[INFO]
----------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO]
----------------------------------------------------------------------------
[INFO] null
[INFO]
----------------------------------------------------------------------------
[DEBUG] Trace
java.lang.NullPointerException
at
org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292)
at
org.apache.maven.plugin.DefaultPluginManager.verifyVersionedPlugin(DefaultPluginManager.j
ava:198)
at
org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:163)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor
.java:1095)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExe
cutor.java:1356)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.segmentTaskListByAggregationNeeds(Def
aultLifecycleExecutor.java:376)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java
:132)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:316)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:113)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:249)
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:585)
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: < 1 second
[INFO] Finished at: Fri Dec 09 13:47:16 CET 2005
[INFO] Final Memory: 1M/2M
[INFO]
----------------------------------------------------------------------------
D:\tmp>
---------------------------------------------------------------
How can I get more debug info?
What should I look for?
Bernd
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