#!/usr/bin/env nix-shell
#!nix-shell -i bash -p curl cacert nix

set -euo pipefail
cd "$(dirname "${BASH_SOURCE[0]}")"

# Discover latest upstream version (same logic as nixpkgs' genericUpdater).
echo "Fetching latest FileBot version from filebot.net..."
version=$(curl -fsSL https://www.filebot.net \
  | sed -rne 's,^.*FileBot_([0-9]+\.[0-9]+\.[0-9]+)-portable\.tar\.xz.*,\1,p' \
  | sort -uV | tail -n1)

# Allow pinning: ./update.sh --version 5.2.0
if [ "${1:-}" = "--version" ] && [ -n "${2:-}" ]; then
  version="$2"
fi

if [ -z "${version:-}" ]; then
  echo "Error: could not determine FileBot version" >&2
  exit 1
fi
echo "Version: $version"

url="https://get.filebot.net/filebot/FileBot_${version}/FileBot_${version}-portable.tar.xz"
hash=$(nix-prefetch-url --type sha256 "$url")
sri_hash=$(nix-hash --type sha256 --to-sri "$hash")
echo "SRI hash: $sri_hash"

sed -i "s|hash = \"sha256-[A-Za-z0-9+/=]\{43,\}=\";|hash = \"$sri_hash\";|" default.nix

echo "Updated utils/pkgs/filebot/default.nix -> $sri_hash"