WIP: Modularized Maven Core / Plugins (JPMS)

[khmarbaise]

Goals

• The idea is to modularized the Maven Core as well all core plugins
• Setting clear boundaries which packages/classes will be exposed and which will not
• Plugins can only use exposed packages/interfaces

Non-Goals

• XXX

Questions

• What about extensions?

[gnodet]

I think that's one big reason why we now have a clean API in Maven 4.
Basically, everything inside org.apache.maven.api package coming from org.apache.maven:maven-api-xxx artifacts is the API. Anything else is not.

[rmannibucau]

think jpms would be too restrictive cause some plugins will then break but it can be enabled with the mvn 4 API and recent changes

[desruisseaux]

JPMS could be experimented in branch. The clean separation in Maven 4 should make that easier. Whether the experiment would be merged to master or not would be discussed after we can see how it works.