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# Support dir for isolating GHC
ghc_support=$TMPDIR/ghc-6.6-nix-support
mkdir -p $ghc_support
# Create isolated package config
packages_db=$ghc_support/package.conf
cp $ghc/lib/ghc-*/package.conf $packages_db
chmod +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
# 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
fi
}
envHooks=(${envHooks[@]} addLibToPackageConf)
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