[Haskell-beginners] [web-devel] yesod dependency hell

[Michael Snoyman]

When I run into this problem, I've found the simplest solution is to
run a local Yackage server[1] that will keep my modified package. Then
cabal is able to still reinstall the package for you automatically.

[1] http://hackage.haskell.org/package/yackage

On Sun, Jul 24, 2011 at 3:46 PM, Haisheng Wu <freizl at gmail.com> wrote:
> I think I experience similar situation.
> I did some change to yesod-auth-0.4.x (Im using yesod-0.8.x which needs
> yesod-auth-0.4.x) locally but it failed to compile because of dependences.
> Then I change my idea to make change its low level package authenticate.
> authenticate compile successfully but failed to rebuild yesod itself.
>
> Basically I spend more than half day trying to "Apply" my change which is
> only one line added.
> However, till now, I have no lucky.
>
> I'm wondering any best practice of Cabal for such scenario.
> Am I doing something wrong?
>
> I really expect a simple and elegant way.~
> Appreciate your help.
>
> -Haisheng
>
>
> On Thu, Jun 23, 2011 at 6:19 AM, Michael Litchard <michael at schmong.org>
> wrote:
>>
>> The solution seems to be to remove yesod from the build-depends
>> section. I'm having other problems, don't think it's related.
>>
>> On Wed, Jun 22, 2011 at 2:52 PM, Michael Litchard <michael at schmong.org>
>> wrote:
>> > Thomas,
>> >             I tried what you suggested and I still have the exact same
>> > problem.
>> >
>> > On Wed, Jun 22, 2011 at 1:50 PM, Michael Litchard <michael at schmong.org>
>> > wrote:
>> >> My thinking is that this problem comes up anytime someone wants to
>> >> play around with experimental code. As evidenced by the
>> >> yesodwiki.cabal file, I think there's a more straightforward solution.
>> >> I'm just not seeing it.
>> >>
>> >> On Wed, Jun 22, 2011 at 1:46 PM, Thomas Hartman
>> >> <thomashartman1 at googlemail.com> wrote:
>> >>> one idea: move .ghc and .cabal to temp directory.
>> >>>
>> >>> start over with a clean slate.
>> >>>
>> >>> On Wed, Jun 22, 2011 at 1:30 PM, Michael Litchard
>> >>> <michael at schmong.org> wrote:
>> >>>> Configuring Aframe-0.0.1...
>> >>>> Warning: This package indirectly depends on multiple versions of the
>> >>>> same
>> >>>> package. This is highly likely to cause a compile failure.
>> >>>> package yesod-auth-0.4.0.2 requires yesod-form-0.1.0.1
>> >>>> package yesod-0.8.2.1 requires yesod-form-0.1.0.1
>> >>>> package Aframe-0.0.1 requires yesod-form-0.2.0
>> >>>>
>> >>>> I specified in Aframe.cabal yesod-form 0.2.0. The above warning is
>> >>>> what I was looking to avoid. What is the solution to this problem? I
>> >>>> could not find an obvious solution in yesodwiki.cabal, even though I
>> >>>> see it's doing something similar to what I want. How did you deal
>> >>>> with
>> >>>> the above warning message?
>> >>>>
>> >>>> On Wed, Jun 22, 2011 at 12:32 PM, Michael Snoyman
>> >>>> <michael at snoyman.com> wrote:
>> >>>>> Have a look at the yesodwiki[1]; basically, you can't use the yesod
>> >>>>> package itself, only the subpackages. This is by design so that a
>> >>>>> single Yesod release will keep API stability, while users can still
>> >>>>> experiment with newer versions of underlying packages.
>> >>>>>
>> >>>>> Michael
>> >>>>>
>> >>>>> [1]
>> >>>>> https://github.com/snoyberg/yesodwiki/blob/master/yesodwiki.cabal
>> >>>>>
>> >>>>> On Wed, Jun 22, 2011 at 10:29 PM, Michael Litchard
>> >>>>> <michael at schmong.org> wrote:
>> >>>>>> I need to use yesod-form 0.2.0. The problem is that the yesod
>> >>>>>> package,
>> >>>>>> and the yesod-auth package expect yesod-form to be 0.1.0*
>> >>>>>> I tried changing the .cabal files but that breaks in ways that
>> >>>>>> makes
>> >>>>>> me think the fix is not so simple. How do I go about being able to
>> >>>>>> use
>> >>>>>> yesod-form 0.2.0
>> >>>>>>
>> >>>>>> _______________________________________________
>> >>>>>> web-devel mailing list
>> >>>>>> web-devel at haskell.org
>> >>>>>> http://www.haskell.org/mailman/listinfo/web-devel
>> >>>>>>
>> >>>>>
>> >>>>
>> >>>> _______________________________________________
>> >>>> web-devel mailing list
>> >>>> web-devel at haskell.org
>> >>>> http://www.haskell.org/mailman/listinfo/web-devel
>> >>>>
>> >>>
>> >>
>> >
>>
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