Reuse Dependencies.scala in docs/build.sbt

[ignasi35]

The sbt build for docs uses the root build.sbt but it uses it's own set of versions for the depending libraries.

docs/build.sbt should use project/Dependencies.scala as much as possible.

Alternatively, docs approach should be reconsidered so instead of being a super-project (separate sbt that imports root/build.sbt) it is part of root or ... (other options)

[octonato]

+1 for making is part of root, but I have no idea why it was made like that.

One of the advantages of having it under root is that contributors can immediately spot when something get broken inside the docs. It's kind of hidden as it is currently configured.

[erip]

If I'm understanding correctly, the proposal here is to remove docs/build.sbt and merge it into the root build.sbt while reusing the Dependencies.scala values as much as possible.

Is this correct?

Update: doing some initial work on this and I got an OutOfMemoryError when sbt was fetching dependencies. 😮

[TimMoore]

That's the basic idea, @erip, but I think there are some unknown complexities in making this work. For one thing, I know that parts of the docs build rely on the Lagom sbt plugin, and my understanding is that you can't build and then use an sbt plugin in the same build.

The OutOfMemoryError might just mean that you need to increase the maximum heap size. It's a big beast 😄

[erip]

I'll bang away at it. I have some very strawman commits in the pipeline currently, but it'll require a more thorough attempt... 😄

[erip]

@TimMoore You seem to be correct here. It seems like in the interim, the issue as-is can be solved fairly trivially by just reusing the root dependencies versions.

It seems like a natural commit to create xVersions for all common dependencies.