Unable to load maven-model-2.0-all from a plugin
------------------------------------------------
Key: MNG-1436
URL: http://jira.codehaus.org/browse/MNG-1436
Project: Maven 2
Type: Bug
Components: maven-core
Versions: 2.0
Reporter: fabrizio giustina
Priority: Critical
Fix For: 2.0.1
The org.apache.maven:maven-model artifact is available with the "all"
classifier in the maven repo. The "all" version also contains project v3
classes and reader/writer.
Adding a dependency with:
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-model</artifactId>
<version>2.0</version>
<type>jar</type>
<classifier>all</classifier>
</dependency>
let you use project 3 classes in a plugin and install successfully.
However, when running the plugin, the maven-model-2.0-all artifact seems to be
ignored and replaced by the version in m2/lib _also if the classifier is
different_.
This is the debug log from an execution of a plugin that uses this dependency:
[INFO] Searching repository for plugin with prefix: 'maven1'.
[DEBUG] maven-maven1-plugin: using locally installed snapshot
[DEBUG] maven-maven1-plugin: using locally installed snapshot
[DEBUG] org.apache.maven.plugins:maven-maven1-plugin:maven-plugin:2.0-SNAPSHOT
(selected for runtime)
[DEBUG] org.codehaus.plexus:plexus-utils:jar:1.0.4 (selected for runtime)
[DEBUG] Retrieving parent-POM from the repository for project:
org.apache.maven:maven-model:jar:2.0
[DEBUG] org.apache.maven:maven-model:jar:all:2.0 (selected for runtime)
[DEBUG] org.codehaus.plexus:plexus-utils:jar:1.0.4 (selected for runtime)
[DEBUG] dom4j:dom4j:jar:1.4 (selected for runtime)
[DEBUG] Configuring mojo
'org.apache.maven.plugins:maven-maven1-plugin:2.0-SNAPSHOT:convert' -->
[DEBUG] (f) basedir = \testconvert
[DEBUG] -- end configuration --
[INFO] [1:convert]
[WARNING] pom.xml in \testconvert already exists, overwriting
[INFO]
----------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO]
----------------------------------------------------------------------------
[INFO] org/apache/maven/model/v3_0_0/io/xpp3/MavenXpp3Reader
[INFO]
----------------------------------------------------------------------------
[DEBUG] Trace
java.lang.NoClassDefFoundError:
org/apache/maven/model/v3_0_0/io/xpp3/MavenXpp3Reader
At the moment this makes impossible to use pom v.3 in mvn.
Apart from the classifier issue that could be solved in a future m2 release, I
would like to find out a workaroud in order to use v3 poms for a mvn plugin
that could automatically convert maven 1 project.xml to mvn pom.xml for making
migration from maven 1 easier.
The current options I can think at are:
- embedding the org.apache.maven.model.v3_0_0.* classes in the plugin
- releasing maven-model-2.0-all with a different artifactId
(maven-model-all-2.0 or maven-model-v3-2.0)
thoughts?
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