Details
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Type:
Bug
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Status:
Open
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Priority:
Blocker
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Resolution: Unresolved
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Affects Version/s: None
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Fix Version/s: None
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Component/s: marmalade-core
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Labels:None
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Environment:- Maven 2 compiled and installed from revision 179977
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Number of attachments :
Description
When "m2 install" is invoked on the "Hello" Plugin example from Maven 2 website, an Exception as follows is thrown:
[Attachment: Marmalade plugin script]
-----------------------------------------------
java.lang.NullPointerException
at org.codehaus.marmalade.metamodel.AbstractMarmaladeTagLibrary.createTag(AbstractMarmaladeTagLibrary.java:59)
at org.codehaus.marmalade.metamodel.MarmaladeTagBuilder.build(MarmaladeTagBuilder.java:67)
at org.codehaus.marmalade.metamodel.MarmaladeTagBuilder.build(MarmaladeTagBuilder.java:83)
at org.codehaus.marmalade.metamodel.MarmaladeTagBuilder.build(MarmaladeTagBuilder.java:83)
at org.codehaus.marmalade.metamodel.ScriptBuilder.build(ScriptBuilder.java:51)
at org.codehaus.marmalade.launch.MarmaladeLauncher.buildScript(MarmaladeLauncher.java:264)
at org.codehaus.marmalade.launch.MarmaladeLauncher.getMarmaladeScript(MarmaladeLauncher.java:313)
at org.apache.maven.tools.plugin.extractor.marmalade.MarmaladeMojoDescriptorExtractor.extractMojoDescriptors(Marma
ladeMojoDescriptorExtractor.java:89)
at org.apache.maven.tools.plugin.extractor.AbstractScriptedMojoDescriptorExtractor.execute(AbstractScriptedMojoDes
criptorExtractor.java:30)
at org.apache.maven.tools.plugin.scanner.DefaultMojoScanner.populatePluginDescriptor(DefaultMojoScanner.java:69)
at org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:93)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:415)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.processGoals(DefaultLifecycleExecutor.java:170)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:91)
at org.apache.maven.DefaultMaven.processProject(DefaultMaven.java:248)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:167)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:246)
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:303)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:243)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:416)
at org.codehaus.classworlds.Launcher.main(Launcher.java:363)
Hi there,
the mentioned problem is caused by the <id> tag. If removed, the plugin can be installed successfully.
There are a couple of other problems with the hello world plugin. I have gathered some hints from users@maven.apache.org and posting them below for the sake of completeness.
HTH,
Tanju
You need to do the following:
<dependencies>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>2.0-alpha-3</version>
</dependency>
<dependency>
<groupId>marmalade</groupId>
<artifactId>marmalade-core</artifactId>
<version>1.0-alpha-4</version>
</dependency>
<dependency>
<groupId>marmalade</groupId>
<artifactId>marmalade-el-commons</artifactId>
<version>1.0-alpha-3</version>
</dependency>
<dependency>
<groupId>marmalade</groupId>
<artifactId>marmalade-tags-io</artifactId>
<version>1.0-alpha-3</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-script-marmalade</artifactId>
<version>2.0-alpha-3</version>
</dependency>
</dependencies>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-hello-plugin</artifactId>
<version>1.0-SNAPSHOT</version>
</plugin>