[Haskell-cafe] Simple CSV parser?

[Dmitri O.Kondratiev]

On Fri, Jun 17, 2011 at 2:05 AM, Henning Thielemann <
lemming at henning-thielemann.de> wrote:

>
> On Fri, 17 Jun 2011, Dmitri O.Kondratiev wrote:
>
>  How to make cabal install all the dependencies? I couldn't find this in
>> the docs at:
>> http://www.haskell.org/haskellwiki/Cabal-Install
>>
>
> Usually, 'cabal install' automatically installs all imported packages. But
> it will certainly not do, if a dependency problem cannot be solved by
> downloading packages. In your case it may be, that installed packages are
> compiled with respect to different versions of the same package, say
> 'transformers'.
>
> I found out, that you get more useful cabal messages if you force
> cabal-install to use a specific version of a package.
>
> Say, run
> $ ghc-pkg list transformers
>
> transformers-0.2.2.0
>
> Then call
> $ cabal install spreadsheet --constraint=transformers==0.2.2.0
>
> What does 'cabal' tell you?
>

ghc-pkg list transformers
/Library/Frameworks/GHC.framework/Versions/612/usr/lib/ghc-6.12.3/package.conf.d:

/Users/user/.ghc/i386-darwin-6.12.3/package.conf.d:
    transformers-0.2.2.0

cabal install spreadsheet --constraint=transformers==0.2.2.0
Resolving dependencies...
cabal: cannot configure spreadsheet-0.1. It requires transformers ==0.0.*
For the dependency on transformers ==0.0.* there are these packages:
transformers-0.0.0.0 and transformers-0.0.1.0. However none of them are
available.
transformers-0.0.0.0 was excluded because of the top level dependency
transformers ==0.2.2.0
transformers-0.0.1.0 was excluded because of the top level dependency
transformers ==0.2.2.0

Compilation exited abnormally with code 1 at Fri Jun 17 02:12:30
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