#!/bin/sh

NIXPKGS='<nixpkgs/maintainers/scripts/find-tarballs.nix>'
NIX='<nixpkgs>'

while getopts "f:" arg; do
  case ${arg} in
    f)
      NIXPKGS="${OPTARG}/maintainers/scripts/find-tarballs.nix"
      NIX="${OPTARG}"
      shift
      shift
      ;;
    h)
      echo "$0 [-f path_to_nixpkgs] package1 ..."
      exit 2
      ;;
  esac
done

if [ $# -eq 0 ]
then
    echo "you need to pass packages"
    exit 1
fi

echo "DOWNLOADING SOURCES TO BUILD $@" > /dev/stderr
mkdir -p "distfiles"
nix-instantiate --json --eval --strict "${NIXPKGS}" --arg expr "with import ${NIX}{}; [$*]" # | ./mirror.pl