{ pkgs
, lib
, gitHostCommitUrl ? "https://github.com/jakehamilton/config/commit"
, ...
}:

let
  inherit (lib.plusultra) override-meta;

  new-meta = with lib; {
    description = "A helper show the current git revision of the system configuration.";
    license = licenses.asl20;
    maintainers = with maintainers; [ jakehamilton ];
  };

  package =
    pkgs.writeShellScriptBin "nixos-revision" ''
      HAS_HELP=false
      HAS_OPEN=false

      while [[ $# -gt 0 ]]; do
      	case $1 in
      		-h|--help)
      			HAS_HELP=true
      			shift
      			;;
      		-o|--open)
      			HAS_OPEN=true
      			shift
      			;;
      		*)
      			shift
      			;;
      	esac
      done

      if [ $HAS_HELP == true ]; then
      	HELP_MSG="
      nixos-revision

      USAGE

        nixos-revision [options]

      OPTIONS

        -h, --help              Show this help message
        -o, --open              Open the revision on GitHub

      EXAMPLES

        $ # Print the current revision
        $ nixos-revision

        $ # Open the current revision on GitHub
        $ nixos-revision --open
      "
      	echo "$HELP_MSG"
        exit 0
      fi

      REVISION=$(nixos-version --json | ${pkgs.jq}/bin/jq -r .configurationRevision)

      if [ $HAS_OPEN == true ]; then
        GITHUB_URL="${gitHostCommitUrl}/$REVISION"
        echo "Opening URL: $GITHUB_URL"
        ${pkgs.xdg-utils}/bin/xdg-open $GITHUB_URL
      else
        echo $REVISION
      fi
    '';
in
override-meta new-meta package