what is the path to a particular module?

Peter Hercek phercek at gmail.com
Sat Aug 15 12:16:16 EDT 2009

On Fri, 14 Aug 2009 14:50:48 -0400, S. Alexander Jacobson wrote:
> Is there a way from GHCi to discover the path to a particular module
> that you have imported or loaded?

It may not be what you wanted but in the worst case you can use ghc-pkg 
list to see all the package names then for each name you can do ghc-pkg 
describe to see there it is installed and what modules it does expose.

All the information is in <ghc-install-dir>/package.conf which just seems 
to be a list of InstalledPackageInfo (Distribution.InstalledPackageInfo). 
So it should be possible to write a function you want easily. 
Surprisingly when I tried to read the list of InstalledPackageInfo from 
my package.conf it failed despite ghc-pkg working well. I did not 
investigate why. Maybe there is a better way.


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