dots/pkgs/Fmt/flake.nix

{
  description = "Flake for custom formatting script";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
      in
      {
        packages.default = pkgs.writeShellApplication {
          name = "Fmt";
          runtimeInputs = with pkgs; [
            stylua
            gnugrep
            nixfmt-rfc-style
            nodePackages.prettier
            shfmt
          ];
          text = (
            ''
              #!${pkgs.bash}/bin/bash
            ''
            + builtins.readFile ./fmt.bash
          );
        };
      }
    )
    // {
      overlays.default = final: prev: { Fmt = self.packages.${final.system}.default; };
    };
}