ghc/haskell tool registry
Christian.Maeder at dfki.de
Wed Nov 21 11:23:24 EST 2007
Claus Reinke wrote:
>> registry sounds like overkill to me. If really an absolute hardcoded
>> path is needed, I would appreciate if it is stored only in a single
>> place (for ghc, ghci, ghc-pkg and package.conf).
> that was my point: how do you find that 'single place',
> given the wide variety of versions, platforms, packagers,
> installation-specific availability, ..?
> the only half-way portable solution (without a special case for every
> platform) i can think of is a program in PATH.
> we don't always keep all versions of ghc tools in PATH,
> but we need one single tool "to bind them all"..;-)
> as long as that tool can be found in PATH, it can serve
> as a mediator/abstract interface for finding everything else,
> independent of platform.
>> Other tools have a "relocate" script, that only changes that location
>> after unpacking (or move).
> think of 'ghc-tools' as the guardian for your 'single place' and of
> 'ghc-tools relocate' as your relocate script.
I think `ghc-pkg` should play this central role, that must in the PATH
and knows the package.conf location. So ghc (or the ghc wrapper) must
call ghc-pkg for the package.conf file (ghci could simply call ghc, like
runghc does call ghc)
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