Re: [web-devel] Call for comments: Yesod 0.2

Unfortunately, it really does require 6.12. The issue is that we need to automatically generate a type instance for "Routes". While 6.10 supports type instances, it doesn't include that support in the template haskell. If people are interested, I think it would be possible to make the Routes type instance dependent upon the template-haskell version number, and then users would need to declare it themselves. By the way, I actually just released web-routes-quasi 0.3.0. Michael On Sun, May 23, 2010 at 12:44 AM, Arie Peterson wrote:

On Sat, 22 May 2010 20:42:51 +0300, Michael Snoyman wrote:

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Note: right now it depends on web-routes-quasi 0.3.0, which has not yet been released, so you'll have to pull that from the github repo.

In order to test my proposed solution (see below), I tried building web-routes-quasi 0.3.0 from git, but I get another cabal version conflict failure:

| Resolving dependencies... | cabal: cannot configure template-haskell-2.4.0.1. It requires base >=4.2 && <5 | For the dependency on base >=4.2 && <5 there are these packages: base-4.2.0.0 | and base-4.2.0.1. However none of them are available. | base-4.2.0.0 was excluded because of the top level dependency base -any | base-4.2.0.1 was excluded because of the top level dependency base -any

I assume this means that it needs ghc 6.12 (which I haven't installed yet). Do you really need template-haskell-2.4.*, or would 2.3.* suffice as well? In that case you could relax the version constraint.

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On Sat, May 22, 2010 at 7:32 AM, James Britt wrote:

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james@james06:~/data/vendor/yesod$ runhaskell Setup.lhs configure --user Configuring yesod-0.2.0... Warning: This package indirectly depends on multiple versions of the same package. This is highly likely to cause a compile failure. package http-wget-0.6.2 requires transformers-0.1.4.0 package control-monad-attempt-0.3.0 requires transformers-0.1.4.0 package authenticate-0.6.2 requires transformers-0.1.4.0 package yesod-0.2.0 requires transformers-0.2.1.0 package MonadCatchIO-transformers-0.2.2.0 requires transformers-0.2.1.0

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Suggestions?

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From a quick look at the source of yesod, it /seems/ that it may work with MonadCatchIO-transformers-0.1.* as well. Is there any reason yesod asks for =0.2.2 ? If not, relaxing this version constraint might fix things.

Regards,

Arie

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