On 2015-01-22 at 12:40:05 +0100, Boespflug, Mathieu wrote: [...]
It sounds to me like Alexander's patch, plus the solution alluded by Joachim above for "invisible" packages that don't clash with ones registered in the ghc-pkg db, would allow us to avoid having any of the following packages leaking into all sandboxes for all users of GHC 7.10 and following:
* haskeline * transformers * xhtml * terminfo
Perhaps others. That would be a big win.
Btw, there's an alternative hack that could be used. Since the remaining use of haskeline/terminfo/transformers would then be mostly in GHCi (if haven't missed anything), which is luckily not a library, we don't actually need those packages to be turned into DSOs. We could do something similiar to what `haddock` inside the GHC tree does w/ e.g. its attoparsec dependency: just embed those 4 packages into the ghci executable as if they weren't separate packages. Cheers, hvr