[Haskell-cafe] GHC API + Cabal API + Cabal version checks: is there a way out?

[Yuri de Wit]

Alejandro,

that is correct, as I see it. Duncan has very good points there but it
seems to me that we need a concrete proposal so we can propose solutions to
the problem. The fact is that the current situation is a middle of the
ground that doesn't help Cabal nor Ghc.




On Fri, Sep 6, 2013 at 10:54 AM, Alejandro Serrano Mena
<trupill at gmail.com>wrote:

> I'm willing to help in the process, if some directions were given to me on
> how to tackle this problem.
>
> In any case, for me is seems fine to have a dependency from cabal to ghc,
> the only problem is the converse: ghc depending on cabal. Is this right?
>
>
> 2013/9/6 Herbert Valerio Riedel <hvr at gnu.org>
>
>> On 2013-09-06 at 15:13:58 +0200, Yuri de Wit wrote:
>> > I spent some time looking into the touch points between ghc and cabal in
>> > the past, and the first oddity i saw was a direct dependency from ghc to
>> > the cabal sources. After taking a closer look it seems that ghc shares
>> some
>> > common, low level modules with cabal that didnt seem to justify the
>> whole
>> > dependency.
>> >
>> > The right solution, imho, is to review these dependencies and move the
>> low
>> > level ones out into a separate package that is shared by both ghc and
>> cabal
>> > and that will rarely change. The direct side effect of this is that ghc
>> > would not be tied directly to a specific cabal version and you would
>> > not have to deal with this issue.
>>
>> [...]
>>
>> fyi, a similiar/related discussion took place few months ago on ghc-devs:
>>
>>  http://www.haskell.org/pipermail/ghc-devs/2013-March/000800.html
>>
>> hth,
>>   hvr
>>
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