#!/usr/bin/env nix-shell
#!nix-shell --pure -i bash -p nix cacert git getopt

# shellcheck shell=bash

if [ ! -d .git ]; then
    echo "This script needs to be run from the root directory of nixpkgs. Exiting."
    exit 1
fi

pkg_dir="$(dirname "$0")"

src="$(nix-build . --no-out-link -A coreboot-toolchain.i386.src)"
urls=$("${src}/util/crossgcc/buildgcc" -u)

tmp=$(mktemp)
echo '{ fetchurl }: [' >"$tmp"

for url in $urls; do
    name="$(basename "$url")"
    hash="$(nix-prefetch-url "$url")"

    cat <<EOF >>"$tmp"
  {
    name = "$name";
    archive = fetchurl {
      sha256 = "$hash";
      url = "$url";
    };
  }
EOF
done

echo ']' >>"$tmp"

sed -i -e 's/https\:\/\/ftpmirror\.gnu\.org/mirror\:\/\/gnu/g' "$tmp"

mv "$tmp" "${pkg_dir}/sources.nix"