flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    systems.url = "github:nix-systems/default";
  };
  outputs = { nixpkgs, systems, ... }:
    let
      forEachSystem = nixpkgs.lib.genAttrs (import systems);
    in
    {
      devShells = forEachSystem (system: {
        default =
          let
            pkgs = import nixpkgs {
              inherit system;
            };
            my-python = pkgs.python3.withPackages (ps: with ps; [
              pip
            ]);
          in
          pkgs.mkShell {
            buildInputs = [
              # JS/TS
              pkgs.nodejs
              # You can set the major version of Node.js to a specific one instead of the default version
              # pkgs.nodejs-19_x

              # You can choose pnpm, yarn, bun, or none (npm).
              # pkgs.nodePackages.pnpm
              # pkgs.yarn
              pkgs.bun

              pkgs.typescript
              pkgs.nodePackages.typescript-language-server

              # Python
              my-python
            ];

            shellHook = ''
              # Tells pip to put packages into $PIP_PREFIX instead of the usual locations.
              # See https://pip.pypa.io/en/stable/user_guide/#environment-variables.
              export PIP_PREFIX=$(${pkgs.coreutils}/bin/pwd)/_build/pip_packages
              export PYTHONPATH="$PIP_PREFIX/${my-python.sitePackages}:$PYTHONPATH"
              export PATH="$PIP_PREFIX/bin:$PATH"
              unset SOURCE_DATE_EPOCH
              pip install -r requirements.txt

              # Install the npm packages
              bun install
            '';
          };
      });
    };
}