[RelEng] Specify P2 repository to publish to Maven as job parameter

[HannesWell]

instead of changing the SDK4Mvn.aggr files to just run the publication job subsequently and then changing it again to the next release cycle's I-build repository.
This avoids the described changes and simplifies the release process.

[HannesWell]

@elsazac this makes changes like #3105 unnecessary during the release process. You can just specify the p2-repository to publish by its URL as parameter when triggering the Maven-publish job.
I have also adjusted the documentation and hope this is sufficient.

[HannesWell]

@stephan-herrmann, this also would make it possible to deploy Y-build snapshots in a simple way, as for example requested in #2625 (comment).
Probably the only additionally required change would be specifying the target (snapshot) maven repository, as I assume that Y-build snapshots should go to another Maven-repository.

Would you be in favor of such deployment? And if yes, where should it go? The JDT eclipse-repo?

[stephan-herrmann]

@stephan-herrmann, this also would make it possible to deploy Y-build snapshots in a simple way, as for example requested in #2625 (comment). Probably the only additionally required change would be specifying the target (snapshot) maven repository, as I assume that Y-build snapshots should go to another Maven-repository.

Would you be in favor of such deployment?

I have no strong opinion either way.

IMHO deploying the entire Y-build would be too much. In the comment you quote only ecj was requested.

And if yes, where should it go? The JDT eclipse-repo?

I don't even know of any such JDT eclipse-repo :-/ -- but it might indeed be a good idea to keep Y-build artifacts separate, just in case there's an unintended overlap of versions between master an the beta branch.

[mickaelistria]

I don't even know of any such JDT eclipse-repo :-/

See https://github.com/eclipse-jdt/eclipse.jdt.core/blob/master/pom.xml#L52 , a p2 repo is created for jdt.core if built with -Pp2-repo profile.

[stephan-herrmann]

I don't even know of any such JDT eclipse-repo :-/

See https://github.com/eclipse-jdt/eclipse.jdt.core/blob/master/pom.xml#L52 , a p2 repo is created for jdt.core if built with -Pp2-repo profile.

This seems to answer a different question. @HannesWell asked "where should it go?", but the pom you reference doesn't show a URL where JDT can deploy maven snapshot artifacts for users to consume.