Re: [tycho-dev] Invoke maven project extension before TychoMavenLifecycl

[Jeff MAURY <jeffmaury@xxxxxxxxxxxxx>]

Please not that the use of Plexus for discovery does not guarantee an order of execution following the declaration in the POM.

Regards
Jeff

On Wed, Mar 7, 2012 at 8:36 AM, Tom Bujok <tom.bujok@xxxxxxxxx> wrote:

Hi guys,

In this thread I described why it is impossible to invoke any processing logic before TychoMavenLifecycleParticipant:
http://dev.eclipse.org/mhonarc/lists/tycho-user/msg02103.html
It is also connected to this problem: http://www.mail-archive.com/users@xxxxxxxxxxxxxxxx/msg123753.html

Such limitation breaks the maven processing principle - since normally the order of plugins' in the pom.xml file defines in which order they are executed. Right now with tycho - there is now way to invoke anything before the tycho project setup finishes.  In order to add some more flexibility to a tycho build I think it would be perfect if there was some kind of a callback mechanism included in the TychoMavenLifecycleParticipant.

let's say that we could have such interface:

public interface TychoLifecycleParticipant {

       void beforeProjectSetup(MavenSession session);
       void afterProjectSetup(MavenSession session);

}

and then in the TychoMavenLifecycleParticipant we could add:

public class TychoMavenLifecycleParticipant extends AbstractMavenLifecycleParticipant {
   @Override
   public void afterProjectsRead(MavenSession session) throws MavenExecutionException {
       Collection<TychoLifecycleParticipant> tychoParticipants = plexus.lookupList(TychoMavenLifecycleParticipant.class);

       for (TychoLifecycleParticipant p : tychoParticipants) {
               p. beforeProjectSetup(session);
        }

       (…)

       for (TychoLifecycleParticipant p : tychoParticipants) {
               p. afterProjectSetup(session);
        }
   }
}


Do you agree with that and would you accept such patch?

Cheers,
Tom Bujok
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Jeff MAURY

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