[breaking] MPS task interface

[sergej-koscejev]

Changed

• All MPS tasks now implement MpsTask interface which defines common properties. As a result, some tasks were affected (all marked as @Incubating):
  • MpsCheck: pluginRoots type was changed from SetProperty<Directory> to ConfigurableFileCollection because the latter is easier to work with from Gradle. This is a breaking change.
  • MpsExecute: folderMacros are now supported and will be passed to MPS.

Deprecated

• MpsCheck, MpsGenerate, MpsExecute: varMacros (or macros in case of MpsExecute) are now deprecated and will be removed in a later release. Only folder macros (pointing to an existing directory) are supported by MPS, any non-folder macros would not have worked properly anyway.

[sergej-koscejev]

I created a PR instead of pushing the change to v1.x right away because it's potentially breaking and I would like to gather some opinions on it in case I'm unknowingly making a big mistake.

[sergej-koscejev]

Having a common interface makes it easier to configure the common properties for all tasks that launch MPS (migrations, generation, model checking, etc.) using tasks.withType(MpsTask).configureEach { ... }.

[sergej-koscejev]

I have a different idea now, I think we should introduce MpsForkOptions interface for these tasks, similar to JavaForkOptions (and probably extending it).