[Nix-dev] Backporting haskell-ng to 14.12

[Raahul Kumar]

One question. Does this backporting work happen a lot? If so, is the stable
branch really helping things if there is a lot of repeated work ?
Aloha,
RK.

On Thu, Jan 8, 2015 at 11:59 PM, Shea Levy <shea at shealevy.com> wrote:

> Ah, actually I see Peter already brought haskell-ng into master via the
> haskellngPackages attribute. So I’ll just backport that, as it won’t touch
> any existing haskellPackages stuff. Never mind!
>
> > On Jan 8, 2015, at 1:07 PM, Shea Levy <shea at shealevy.com> wrote:
> >
> > Hi all,
> >
> > I’d like to make a case for backporting Peter’s haskell-ng work to 14.12
> once it’s merged into master. If I understand correctly, then if a haskell
> package’s version (and the versions of its dependency closure) stay the
> same, the haskell-ng branch will result in what is effectively the same
> package (though there may be minor tweaks that result in a changed
> outpath), and with the compatibility layer in place the old attribute names
> will be the same, with the end result that, modulo binary caches, a NixOS
> configuration that worked before will still work. On the other hand, if we
> don’t backport haskell-ng, then 14.12 users will miss out on the improved
> functionality (such as deep overriding) and we will not be able to backport
> new haskell packages added to master after the switch.
> >
> > Peter, is my understanding correct? And am I right in thinking that
> haskell-ng won’t require bumping haskell packages any major versions from
> what is currently on 14.12?
> >
> > Peter, and everyone else: Thoughts on this?
> >
> > Thanks,
> > Shea
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