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sydnix/modules/home/haskell/ghc-with-packages.sh
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feat(haskell): ghc-with-packages
2026-05-01 15:08:53 -06:00

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declare -a default_ghc_packages=(pretty-simple lens)
ghc-with-packages () {
declare -a packages=()
local GHC_COMMAND=${GHC_COMMAND:-"ghc"}
packages+=$default_ghc_packages
local exit=0 stop_args
while [[ ! -z "$1" && -z "$stop_args" ]]; do
local opt="$1"
shift 1
case "$opt" in
"--")
stop_args=1
;;
"-p")
while [[ ! -z "$1" && "$1" != -* ]]; do
packages+=("$1")
shift 1
done
;;
*|"-h")
exit=1
;;
esac
done
local pretty_simple
for p in "$packages"; do
if [[ "$p" = "pretty-simple" ]]; then
pretty_simple="-interactive-print=Text.Pretty.Simple.pPrint"
fi
done
if [[ "$exit" -eq 0 ]]; then
# echo "packages: ${packages[@]}"
# echo "args: $*"
local pkgs="${packages[@]}"
nix-shell \
-p "haskellPackages.ghcWithPackages (p: with p; [ $pkgs ])" \
--run "$GHC_COMMAND $pretty_simple $*"
else
echo >&2 "Usage: ghci-with-packages [-p packages…] [-- ghci-options]"
return $exit
fi
}
export -f ghc-with-packages
ghci-with-packages () {
GHC_COMMAND=ghci ghc-with-packages "$@"
}
export -f ghci-with-packages