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Re: [m2e-dev] resolving implicit dependency in project configurator

I have not looked at Fred's answer, but here is an alternative take ;-)

1. This is actually tricky. "Proper" implementation has to resolve
dependencies in the context of a project, which will take into account
project-specific repositories, dependencyManagement and other aspects of
maven dependency resolution logic. The easiest way to do this is to
inject <dependency> element into MavenProject model and let standard
m2e/maven dependency resolver do its thing. There is prototype support
for doing this from m2e extensions, but it is not used by any extension
I know of. If you are willing to risk it, have a look at
ILifecycleMapping2 and DefaultMavenDependencyResolver. It should be
possible to subclass/wrap DefaultMavenDependencyResolver and
inject implicit dependencies before delegating to the default
implementation. As usual, if this does not work, I am willing to
consider quality patches.

2. As explain in [1], lifecycle mapping metadata provided by m2e
extensions takes preference over metadata provided by maven plugins. In
other words, m2e will use mapping metadata provided by your extension
and ignore the plugin's.

[1] http://wiki.eclipse.org/M2E_plugin_execution_not_covered

--
Regards,
Igor

On 12-05-31 12:31 PM, Andrew Eisenberg wrote:
Some more, related questions.

1. It turns out that not only do I need to add a single dependency,
but I also need to add some transitive dependencies.  What is the
recommended way to track down transitive dependencies

2. The plugin that I am writing the configurator for already has a
lifecycle-mapping-metadata.xml included.  It has this action:
                         <action>
                                 <execute>

<runOnIncremental>true</runOnIncremental>

<runOnConfiguration>false</runOnConfiguration>
                                 </execute>
                         </action>
Now, the configurator needs to do more than just execute the plugin.
I first need to configure a few natures, add a few things to the
classpath, etc.  And then I need to execute the plugin.  What is the
recommended way of doing this?

thanks for your help.

Andrew

On Wed, May 30, 2012 at 3:16 PM, Andrew Eisenberg<andrew@xxxxxxxxxxxx> wrote:
Yep.  This works.  Very nice.

On Wed, May 30, 2012 at 1:16 PM, Andrew Eisenberg<andrew@xxxxxxxxxxxx> wrote:
Thanks.  I'll give this a try.

On Wed, May 30, 2012 at 12:25 PM, Igor Fedorenko<igor@xxxxxxxxxxxxxx> wrote:
IMaven#resolve can be used to resolve an artifact from specified Maven
repositories. This call will download the artifact if necessary. There
is currently no proper way to force re-resolution of the artifact if
it's available in maven local repository, but you may be able to use
ArtifactRepository.setReleaseUpdatePolicy and/or .setSnapshotUpdatePolicy.

--
Regards,
Igor


On 12-05-30 1:39 PM, Andrew Eisenberg wrote:

Hi all,

I am creating a project configurator for a maven plugin and maven
extension.  The extension (among other things) adds an implicit
dependency to the project.  I would like to replicate this
functionality inside of the project configurator.  I know the
artifact, group, and version of the dependency.  My question is: how
to I resolve that to get a jar file in the local repo?  Furthermore,
if the artifact has not been downloaded yet, how do I force it to be
so?

thanks,
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