nix-config/modules/scripts/onchange.nix

{ withSystem, ... }:

let
  name = "onchange";
in
{
  perSystem =
    { pkgs, ... }:
    with pkgs;
    {
      packages.${name} = writeShellApplication {
        inherit name;

        runtimeInputs = [
          coreutils
          entr
        ];

        text = ''
          PATTERN="$1"
          shift 1

          find . -path "$PATTERN" -type f | entr -cs "$@"
        '';
      };
    };

  flake.modules.homeManager.base =
    { pkgs, ... }:
    {
      home.packages = [
        (withSystem pkgs.system (psArgs: psArgs.config.packages.${name}))
      ];
    };
}