#!/usr/bin/env bash

set -eu -o pipefail

if [[ $# -lt 1 ]]; then
    echo "$0: version" >&2
    exit 1
fi


VERSION=$1

declare -A SYSTEMS HASHES
SYSTEMS=(
    [i686-linux]=linux-ia32
    [x86_64-linux]=linux-x64
    [armv7l-linux]=linux-armv7l
    [aarch64-linux]=linux-arm64
    [x86_64-darwin]=darwin-x64
)

hashfile="$(nix-prefetch-url --print-path "https://github.com/electron/electron/releases/download/v${VERSION}/SHASUMS256.txt" 2>/dev/null | tail -n1)"

echo "Entry similar to the following goes in default.nix:"
echo
echo "  electron_${VERSION%%.*} = mkElectron \"${VERSION}\" {"

for S in "${!SYSTEMS[@]}"; do
  hash="$(grep " *electron-v${VERSION}-${SYSTEMS[$S]}.zip$" "$hashfile"|cut -f1 -d' ')"
  echo "    $S = \"$hash\";"
done

echo "  };"