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

24 Jul 2011


      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  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 
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 
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 
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
 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
 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
 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
>  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@haskell.org
>> http://www.haskell.org/mailman/listinfo/web-devel
>>
>
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