Everywhere that GHC/Haskell Platform installs

Question

Assume I want to completely reinstall GHC/HP. I want to (as much for superstition as anything) delete anything and everything from previous installs. What do I actually need to delete (and where)?

Edit: I'm on OSX, but I'm more curious if this information is available in general, for all systems.

Edit2: So far we have:

OSX:
/Library/Frameworks/GHC.framework/
~/.cabal/
/usr/bin/ -- symlinks

I'll add to that (based on "prefix" defined here: http://www.vex.net/~trebla/haskell/sicp.xhtml#storage):
prefix/lib/
prefix/share/
prefix/bin/
prefix/share/doc/
/usr (/local) /lib/[ghc-version]
/usr (/local) /share/doc/ghc/html/libraries/ -- documentation
/usr (/local) /share/doc/ghc/
/usr (/local) /bin
/var/lib/[ghc-version]
/etc/[ghc-version]
~/.ghc/

Edit 3:
OS X:
~/Library/Haskell

Linux:
??

Windows:
??

Answer 1

Had to remove Haskell Platform on OS X recently. Most are cleaned up via Uninstaller:

sudo /Library/Frameworks/GHC.framework/Versions/Current/Tools/Uninstaller 

These have to be cleaned up manually:

rm -r ~/.cabal rm -r ~/.ghc rm -r ~/Library/Haskell 

Alternatively, as documented in

/Library/Haskell/doc/start.html 

there is now a custom uninstall command with options,

/Library/Haskell/bin/uninstall-hs 

In general, one can document the files created by any activity (installer, ...) by bracketing the activity in a work directory with

echo >timestamp [activity] sudo find -x / -newer timestamp -print >snapshot.txt 

Answer 2

If you've installed a Haskell Platform since about 2012 on OS X, just run

uninstall-hs 

and carefully read what it outputs. You'll need to run it again with the options it offers you. Run

uninstall-hs --help 

for more options.

---

Below is my original answer, which will still work, but doesn't offer as many options and is a bit "ham fisted":

Warning: This script is extreme. It will remove even your custom config files for GHC and Cabal, and executables you've built that are still in ~/Library/Haskell or ~/.cabal. Use caution; review what it is about to do; have backups; caveat scriptor!

#!/bin/bash set -x  sudo rm -rf /Library/Frameworks/GHC.framework sudo rm -rf /Library/Frameworks/HaskellPlatform.framework sudo rm -rf /Library/Haskell rm -rf ~/.cabal rm -rf ~/.ghc rm -rf ~/Library/Haskell find /usr/bin /usr/local/bin -type l | \   xargs -If sh -c '/bin/echo -n f /; readlink f' | \   egrep '//Library/(Haskell|Frameworks/(GHC|HaskellPlatform).framework)' | \   cut -f 1 -d ' ' > /tmp/hs-bin-links sudo rm -f `cat /tmp/hs-bin-links` 

You may want to add lines to save off and restore your config files like:

mv ~/.cabal/config /tmp/cabal-config 2>/dev/null || true mv ~/.ghc/gchi.conf /tmp/ghci-config 2>/dev/null || true 

and

mkdir ~/.cabal mkdir ~/.ghc cp /tmp/cabal-config ~/.cabal/config 2>/dev/null || true cp /tmp/ghci-config ~/.ghc/gchi.conf 2>/dev/null || true 

Bracket the rm lines with these. Though you may or may not want your old ~/.cabal/config if you are upgrading to newer stuff.

Note that this only deals with the current user's home directory. If you have multiple user accounts that all use Haskell, then the other accounts will need cleaning as well. (Repeat the lines involving ~.)