RAT-514: WIP Gradle Plugin against 0.17

[snazy]

No description provided.

[snazy]

This is an initial draft against the 0.17 release tag as there's no 0.18 branch yet.
It seems to work.

I've included the HTML template included in #568.

The code is very much the same (except for all the things that are not in Java 8).

[snazy]

At least tests pass locally :)

[Claudenw]

Needs documentation generation.

[Claudenw]

Add a method to RatTool public Map<String, GradleOption> gradleOptions() to return a sorted map of CLI option name to GradleOption (see mvnOptions, antOptions, cliOptions).

This will make the options available for documentation.

[Claudenw]

Add a section to this pom to generate the site documentaiton.

See rat-plugin initial site generation

The result should generate markdown documentation for this component including a list of options similar to the maven and ant lists.

[ottlinger]

@snazy I'd prefer to have this PR against master ..... before merging it we should clarify the roadmap for an upcoming release. To my mind the architecture discussions will mean a very long development time.
RAT0.17 took 2 years and people were complaining about long release cycles.

@Claudenw Not sure how fast we can transform RAT to become ready for modular clients?! Personally I'd try to avoid having multiple long running branches with contrary concepts being implemented, while downstream clients would prefer faster releases and bugfixes.

WDYT?

[snazy]

prefer to have this PR against master

Agree. #568 is there for master.

before merging it we should clarify the roadmap for an upcoming release.

+1