cryptkeeper/flake.nix at master · barricklab/cryptkeeper · GitHub

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{
  description = "CryptKeeper Dev Template";

  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1";

  outputs = inputs:
    let
      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
      forEachSupportedSystem = f: inputs.nixpkgs.lib.genAttrs supportedSystems (system: f {
        pkgs = import inputs.nixpkgs { inherit system; config.allowUnfree = true; };
      });
      version = "3.13";
    in
    {
      devShells = forEachSupportedSystem ({ pkgs }:
        let
          concatMajorMinor = v:
            pkgs.lib.pipe v [
              pkgs.lib.versions.splitVersion
              (pkgs.lib.sublist 0 2)
              pkgs.lib.concatStrings
            ];

          python = pkgs."python${concatMajorMinor version}";
        in
        {
          default = pkgs.mkShell {

            nativeBuildInputs = [
              pkgs.stdenv.cc.cc.lib
            ];

            venvDir = ".venv";

            postShellHook = ''
              venvVersionWarn() {
              	local venvVersion
              	venvVersion="$("$venvDir/bin/python" -c 'import platform; print(platform.python_version())')"

              	[[ "$venvVersion" == "${python.version}" ]] && return

              	cat <<EOF
              Warning: Python version mismatch: [$venvVersion (venv)] != [${python.version}]
                       Delete '$venvDir' and reload to rebuild for version ${python.version}
              EOF
              }
              venvVersionWarn

              export LD_LIBRARY_PATH=${pkgs.zlib}/lib:${pkgs.stdenv.cc.cc.lib}/lib:$LD_LIBRARY_PATH
            '';

            packages = [
              python.pkgs.venvShellHook

              pkgs.gcc
              pkgs.libffi
              pkgs.zlib
              pkgs.stdenv.cc.cc.lib

              (pkgs.callPackage ./nix/transtermhp.nix {})
              pkgs.viennarna

              pkgs.ruff
            ];

          };
        });
    };
}