#!/usr/bin/env bash

set -e

case $# in
  0) ship=zod; target=./s/zod;;
  1) ship=$1; target=./s/$1;;
  2) ship=$1; target=$2;;
  *) echo "Usage: $0 [ship] [target-dir]" >&2
     exit 1;;
esac

if [ -e "$target" ]
then echo "Target directory '$target' already exists." >&2
     exit 1
fi

pkg=$(nix-build nix/ops/boot-ship.nix --arg ship "\"$ship\"" --no-out-link)

mkdir -p "$(dirname "$target")"
cp -r $pkg/ $target
chmod -R u+rw $target