Clean up source dependency build artefacts

[thumphries]

I have 22GB worth of build artefacts inside dist dirs in source dependencies. Seems like this would be easy to nuke inside mafia clean, i.e. remove lib/source-dep/dist for each source dep.

Any reason not to implement this? @jystic

[erikd-ambiata]

mafia clean cleans the build artifacts from the current project (much like cabal clean does). I think making it also clean all the build artefacts for the required libraries would be a bad idea, especially for anything that uses amazonka.

However i would be 👍 on an extra command option like mafia clean --purge.

[jacobstanley]

I think if you delete those directories it will corrupt your cache? need to verify that.

Ideally we should treat source dependencies the same as hackage ones and build a copy of the source in the global cache, that's the real fix I think.

[thumphries]

I think if you delete those directories it will corrupt your cache?

That's... concerning. Why? Data files?

[thumphries]

I think making it also clean all the build artefacts for the required libraries would be a bad idea, especially for anything that uses amazonka.

AFAIK you don't get any reuse out of those dist dirs, since they get dropped into the global cache and then symlinked back.

[jacobstanley]

That's... concerning. Why? Data files?

Yeah it is, I'm not 100% on that, I just have my suspicions that's it could be a problem