elixir-shell.nix

{ pkgs ? import <nixpkgs> { } }:

pkgs.mkShell {
  packages = [
    pkgs.elixir
    pkgs.exercism
    pkgs.elixir-ls
  ] ++
  # Linux only
  pkgs.lib.optionals pkgs.stdenv.isLinux [
    # for ExUnit notifier
    pkgs.libnotify

    # for package - file_system
    pkgs.inotify-tools
  ];

  shellHook = ''
    # limit mix to current project
    mkdir -p .nix-mix
    export MIX_HOME=$PWD/.nix-mix

    # rewire executables
    export PATH=$MIX_HOME/bin:$PATH
    export PATH=$MIX_HOME/escripts:$PATH

    # limit history to current project
    export ERL_AFLAGS="-kernel shell_history enabled -kernel shell_history_path '\"$PWD/.erlang-history\"'"
  '';

}