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

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.

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Thomas, I tried what you suggested and I still have the exact same

On Wed, Jun 22, 2011 at 2:52 PM, Michael Litchard wrote: problem.

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On Wed, Jun 22, 2011 at 1:50 PM, Michael Litchard

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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:

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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:

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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@snoyman.com> wrote:

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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@schmong.org> wrote: > I need to use yesod-form 0.2.0. The problem is that the yesod

wrote: package,

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> 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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