[Haskell-cafe] Wiki software?

[Gwern Branwen]

On Sat, Nov 21, 2009 at 11:14 AM, Vladimir Ivanov
<vladimir.v.ivanov at gmail.com> wrote:
> I decided to give orchid a try, but failed to install the latest
> version (0.0.8) using cabal.
>
> The reason is that one of the dependencies (filestore) depends on
> parsec-2.0.* and orchid requires parsec3. I installed filestore-0.2
> separately, but nothing changed.
>
> $ cabal install orchid
> Resolving dependencies...
> cabal: cannot configure filestore-0.2. It requires parsec ==2.*
> For the dependency on parsec ==2.* there are these packages: parsec-2.0,
> parsec-2.1.0.0 and parsec-2.1.0.1. However none of them are available.
> parsec-2.0 was excluded because orchid-0.0.8 requires parsec ==3.0.*
> parsec-2.1.0.0 was excluded because orchid-0.0.8 requires parsec ==3.0.*
> parsec-2.1.0.1 was excluded because orchid-0.0.8 requires parsec ==3.0.*
>
> $ ghc-pkg list filestore
> /usr/lib64/ghc-6.10.1/./package.conf:
> ~/.ghc/x86_64-linux-6.10.1/package.conf:
>    filestore-0.2, filestore-0.3.2, filestore-0.3.3
>
> $ ghc-pkg list parsec
> /usr/lib64/ghc-6.10.1/./package.conf:
>    parsec-2.1.0.1, parsec-3.0.0
>
> $ cabal --version
> cabal-install version 0.6.2
> using version 1.6.0.2 of the Cabal library
>
> Have you seen this before?
> I hope I overlooked something trivial... =)
>
> -- vi

Apparently you can build filestore with parsec-3 if you want.
Data/FileStore/Git.hs doesn't seem to use any of the functionality
that changed between 2 & 3. I swapped the dep:

 hunk ./filestore.cabal 35
 -                         parsec >= 2 && < 3, process, time,
datetime, regex-posix, xml, split, Diff
 +                         parsec >= 3, process, time, datetime,
regex-posix, xml, split, Diff

Configured, noticing what parsec was being used:

 Dependency parsec >=3: using parsec-3.0.0

Built & installed successfully.

-- 
gwern