Hi,
there's still some work left to do but after a rather long journey we're
finally approaching a point where Maven 3.x stabilizes and can be used
as a drop-in replacement for Maven 2.x. In an attempt to hunt down
regressions/incompatibilities and to provide users an overview of known
issues when upgrading to Maven 3.x, I created some wiki page [0] that
lists plugins and their status regarding interop with Maven 3.
This plugin matrix is derived from the integration tests of the
respective plugin. That leads me to the point of this mail: We could
need some help here. Some of plugins at Mojo have little to no
integration tests that could be used to check interop with Maven 3.x.
The important difference between integration tests and simple unit tests
here is the possibility to run the tests with an alternative Maven
version, say the Maven version that runs the main build.
This kind of testing can be realized by using the maven-invoker-plugin
[1] or by using traditional JUnit-based tests that employ the
maven-verifier to fork Maven. The first approach is IMHO the easier way
and is demonstrated by many of the Apache plugins, e.g. the
maven-clean-plugin [2]. The second approach is more powerful and shown
by the maven-remote-resources-plugin [3] or the maven-surefire-plugin [4].
So, if anybody out there has some spare time left and is interested in
helping with a smooth birth of Maven 3, please join forces and help to
create some basic ITs for the Mojo plugins that would enable us to
detect problems early. I'm happy to help in case of questions regarding
the general test setup arise.
For those of you that want to try the current state of 3.x by
themselves, the CI spits out ready-made distros [5] built from SVN's trunk.
Thanks in advance,
Benjamin
[0]
http://cwiki.apache.org/confluence/display/MAVEN/Maven+3.x+Compatibility+Notes
[1] http://maven.apache.org/plugins/maven-invoker-plugin/
[2]
http://svn.apache.org/repos/asf/maven/plugins/trunk/maven-clean-plugin/src/it
[3]
http://svn.apache.org/repos/asf/maven/plugins/trunk/maven-remote-resources-plugin/src/test/java/org/apache/maven/plugin/resources/remote/it
[4]
http://svn.apache.org/repos/asf/maven/surefire/trunk/surefire-integration-tests
[5]
https://grid.sonatype.org/ci/job/maven-3.0.x-bootstrap/jdk=1.5,label=ubuntu/ws/trunk/apache-maven/target/
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