.bashrc

ghc-pkg-clean() {
  _have ghc-pkg || return 1

  while read -r pkg; do
    echo "attempting to unregister $pkg..."
    ghc-pkg $* unregister $pkg
  done <(ghc-pkg $* check |& sed '/^There are problems in package \([^:]*\):$/!d; s//\1/')
}

ghc-pkg-reset() {
  read -p 'Are you sure (y/n)? ' ans

  if [[ "$ans" =~ y*|Y* ]]; then
    rm -rf "$HOME/.cabal/packages"/*/*
    rm -rf "$HOME/.cabal/bin"/*
    rm -rf "$HOME/.ghc"
  fi
}