dev de plugin Ant pour Maven 2

**DanielW33** · 27/07/2006, 16h24

suite a une discussion je suis en train d'etudier le developpement d'un plugin Ant pour Maven
en suivant le tutoriel suivant.
Malheureusement pour la premiere partie ("Getting started : Hello World") j'ai deja des probleme :
Apres avoir creer les fichiers "hello.build.xml","hello.mojos.xml" et "pom.xml":
je peux lancer la commande "mvn -U install" --> jusque la pas de probleme, il m'installe bien mon plugin
../.m2\repository\plugins\hello-plugin\1.0-SNAPSHOT\hello-plugin-1.0-SNAPSHOT.jar

Mais ensuite en lancant la commande "mvn org.myproject.plugins:hello-plugin:hello"
j'ai une erreur

Code :

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D:\>mvn org.myproject.plugins:hello-plugin:hello
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
        at org.apache.maven.plugin.descriptor.PluginDescriptor.getMojo(PluginDescriptor.java:259)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1524)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.segmentTaskListByAggregationNeeds(DefaultLifecycleExecutor.java:381)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:135)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
        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: Thu Jul 27 16:21:50 CEST 2006
[INFO] Final Memory: 1M/3M
[INFO] ------------------------------------------------------------------------

**denisC** · 28/07/2006, 09h34

Envoyé par DanielW33

../.m2\repository\plugins\hello-plugin\1.0-SNAPSHOT\hello-plugin-1.0-SNAPSHOT.jar

Tu es sur de ce repertoire? Ca ne me parait pas être le bon? A mon avis, il manque de groupId ce truc....

Envoyé par DanielW33

Mais ensuite en lancant la commande "mvn org.myproject.plugins:hello-plugin:hello"
j'ai une erreur

Et avec un -X ?

**DanielW33** · 28/07/2006, 10h02

les fichiers exemple ( pom.xml , hello.build.xml et hello.mojos.xml) sont un copier-coller du tutorial ils sont placer a la racine D:

ma commande mvn -U install doit, si je ne m'abuse

m'installer le plugin dans mon repository .m2

Code :

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D:\>mvn -U install
[INFO] Scanning for projects...
[INFO] ----------------------------------------------------------------------------
[INFO] Building Hello Plugin
[INFO]    task-segment: [install]
[INFO] ----------------------------------------------------------------------------
[INFO] artifact org.apache.maven.plugins:maven-plugin-plugin: checking for updates from central
[INFO] artifact org.apache.maven.plugins:maven-resources-plugin: checking for updates from central
[INFO] artifact org.apache.maven.plugins:maven-compiler-plugin: checking for updates from central
[INFO] artifact org.apache.maven.plugins:maven-surefire-plugin: checking for updates from central
[INFO] artifact org.apache.maven.plugins:maven-jar-plugin: checking for updates from central
[INFO] artifact org.apache.maven.plugins:maven-install-plugin: checking for updates from central
[WARNING]
        Artifact org.apache.maven:maven-plugin-api:jar:2.0.1:runtime retains local scope 'runtime' overriding broader scope 'compile'
        given by a dependency. If this is not intended, modify or remove the local scope.
 
[WARNING]
        Artifact org.apache.maven:maven-project:jar:2.0.1:runtime retains local scope 'runtime' overriding broader scope 'compile'
        given by a dependency. If this is not intended, modify or remove the local scope.
 
[WARNING]
        Artifact org.apache.maven:maven-plugin-descriptor:jar:2.0:runtime retains local scope 'runtime' overriding broader scope 'compile'
        given by a dependency. If this is not intended, modify or remove the local scope.
 
[WARNING]
        Artifact org.apache.maven:maven-plugin-tools-api:jar:2.0.1:runtime retains local scope 'runtime' overriding broader scope 'compile'
        given by a dependency. If this is not intended, modify or remove the local scope.
 
[INFO] [plugin:descriptor]
[WARNING] Goal prefix is: hello; Maven currently expects it to be hello
[INFO] Using 3 extractors.
[INFO] Applying extractor for language: java
[INFO] Extractor for language: java found 0 mojo descriptors.
[INFO] Applying extractor for language: bsh
[INFO] Extractor for language: bsh found 0 mojo descriptors.
[INFO] Applying extractor for language: ant
[INFO] Extractor for language: ant found 0 mojo descriptors.
[INFO] [resources:resources]
[INFO] Using default encoding to copy filtered resources.
[INFO] [compiler:compile]
[INFO] No sources to compile
[INFO] [resources:testResources]
[INFO] Using default encoding to copy filtered resources.
[INFO] [compiler:testCompile]
[INFO] No sources to compile
[INFO] [surefire:test]
[INFO] No tests to run.
[INFO] [jar:jar]
[INFO] Building jar: D:\target\hello-plugin-1.0-SNAPSHOT.jar
[INFO] [plugin:addPluginArtifactMetadata]
[INFO] [install:install]
[INFO] Installing D:\target\hello-plugin-1.0-SNAPSHOT.jar to C:\Documents and Settings\..\.m2\repository\plugins\hello-plugin\1.0-SNAPSHOT\hello-plugin-1.0-SNAPSHOT.jar
[INFO] [plugin:updateRegistry]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 9 seconds
[INFO] Finished at: Fri Jul 28 09:57:14 CEST 2006
[INFO] Final Memory: 5M/11M
[INFO] ------------------------------------------------------------------------

ensuite , meme avec le param -X le debug ne me precise pas grand chose

Code :

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D:\>mvn -X org.myproject.plugins:hello-plugin:hello
+ Error stacktraces are turned on.
Maven version: 2.0.4
[DEBUG] Building Maven user-level plugin registry from: 'C:\Documents and Settings\dweltz\.m2\plugin-registry.xml'
[DEBUG] Building Maven global-level plugin registry from: 'D:\maven-2.0.4\bin\..\conf\plugin-registry.xml'
[INFO] Scanning for projects...
[DEBUG] hello-plugin: resolved to version 1.0-SNAPSHOT from local repository
[DEBUG] Skipping disabled repository central
[DEBUG] hello-plugin: using locally installed snapshot
[DEBUG] hello-plugin: using locally installed snapshot
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[DEBUG] Trace
java.lang.NullPointerException
        at org.apache.maven.plugin.descriptor.PluginDescriptor.getMojo(PluginDescriptor.java:259)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1524)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.segmentTaskListByAggregationNeeds(DefaultLifecycleExecutor.java:381)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:135)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
        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 Jul 28 09:49:46 CEST 2006
[INFO] Final Memory: 1M/3M
[INFO] ------------------------------------------------------------------------

la meme erreur apparait