shell.nix

let
  sources = import ./nix/sources.nix;
  rustPlatform = import ./nix/rust.nix { inherit sources; };
  pkgs = import sources.nixpkgs { overlays = [ (import sources.rust-overlay) ]; };
in
  with pkgs;

  pkgs.mkShell {
    buildInputs = [
      rustPlatform.rust.cargo
      git
      stdenv.cc.cc.lib
      (python38.withPackages(ps: with ps; [ virtualenv tox setuptools ]))
      (python39.withPackages(ps: with ps; [ virtualenv setuptools ]))
      (python37.withPackages(ps: with ps; [ virtualenv setuptools ]))
      py-spy
      heaptrack
      cargo-watch
      cargo-limit
      wasmtime
      wasm-pack
    ];

    shellHook = ''
       # workaround for https://github.com/NixOS/nixpkgs/blob/48dfc9fa97d762bce28cc8372a2dd3805d14c633/doc/languages-frameworks/python.section.md#python-setuppy-bdist_wheel-cannot-create-whl
       export SOURCE_DATE_EPOCH=315532800 # 1980
       export LD_LIBRARY_PATH="${stdenv.cc.cc.lib}/lib64:$LD_LIBRARY_PATH";
    '';
  }