* GHC setup hook: don't generate wrappers around ghc etc., instead

set GHC_PACKAGE_PATH.
* Let Cabal generate a package configuration file
  ($out/nix-support/ghc-package.conf) instead of a registration
  script.

svn path=/nixpkgs/trunk/; revision=15127

pkgs/development/compilers/ghc/setup-hook.sh

@@ -1,40 +1,15 @@
-# Support dir for isolating GHC
-ghc_support=$TMPDIR/ghc-6.8-nix-support
-ensureDir $ghc_support
-
 # Create isolated package config
-packages_db=$ghc_support/package.conf
+packages_db=$TMPDIR/.package.conf
 cp @ghc@/lib/ghc-*/package.conf $packages_db
-chmod +w $packages_db
+chmod u+w $packages_db
 
-# Generate wrappers for GHC that use the isolated package config
-makeWrapper() {
-  wrapperName="$1"
-  wrapper="$ghc_support/$wrapperName"
-  shift #the other arguments are passed to the source app
-  echo '#!'"$SHELL" > "$wrapper"
-  echo "exec \"@ghc@/bin/$wrapperName\" $@" '"$@"' >> "$wrapper"
-  chmod +x "$wrapper"
-}
-
-makeWrapper "ghc"         "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "ghci"        "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "runghc"      "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "runhaskell"  "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "ghc-pkg"     "--global-conf $packages_db"
-
-# Add wrappers to search path
-export _PATH=$ghc_support:$_PATH
+export GHC_PACKAGE_PATH=$packages_db
 
 # Env hook to add packages to the package config
-addLibToPackageConf ()
-{
-    local regscript=$1/nix-support/register-ghclib.sh
-    if test -f $regscript; then
-        local oldpath=$PATH
-        export PATH=$ghc_support:$PATH
-        sh $regscript $package_db
-        export PATH=$oldpath
+addLibToPackageConf () {
+    local confFile=$1/nix-support/ghc-package.conf
+    if test -f $confFile; then
+        @ghc@/bin/ghc-pkg register $confFile
     fi
 }