[Haskell-cafe] upgrading regex in GHC 6.8.2

Alex Jacobson alex at alexjacobson.com
Fri Dec 21 01:08:38 EST 2007

Searchpath already does recursive module chasing accross the internet.
If your module is available at a url in an unpacked module hierarchy or 
in a tgz file or if it is exposed in a darcs/svn/cvs etc repo, 
searchpath can retrieve it and put it on your local import path.

The main limitations on using searchpath are that the packages you need 
may not yet have been added to the searchpath directory and it does not 
currently run cabal so if the module you import need some interesting 
build process you will need to handle them manually.

The directory issue could be solved if someone were to write a small 
patch to hackage so that it exposes the database in the correct format. 
  The cabal issue I think requires only a small modification to the 
searchpath code but I don't know cabal well enough to do it....


Duncan Coutts wrote:
> On Fri, 2007-12-21 at 13:58 +1030, Michael Mounteney wrote:
>> Hello, I have an application that uses/used Text.Regex and have just updated 
>> GHC from 6.6.1 to 6.8.2 and it seems that Text.Regex is gone, so I'm trying 
>> to install the replacement from Hackage.
>> First of all, the procedure is quite tedious as one has to install the 
>> hierarchy of dependencies manually but apparently there are moves to automate 
>> this process.
> Yes. You can try cabal-install now if you like:
> http://haskell.org/cabal/code.html
> though be prepared to report bugs and limitations:
> http://hackage.haskell.org/trac/hackage
> That said, I use it all the time now. It's much quicker than manually
> downloading and configuring everything.
>> The procedure stalled on regex-base-0.92.
> None of the 0.9x versions have been updated for the base-3 library that
> comes with ghc-6.8 now. Instead try using:
> regex-base-
> regex-posix-
> regex-compat-
> These versions work with ghc-6.8 and earlier.
> These would be the "latest" versions if it were not for the 0.9x series.
> We need some way to tell hackage or cabal-install that the latest
> version is not necessarily the best or recommended version.
> Duncan
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