{ pkgs, lib, ... }:

{
  # https://devenv.sh/packages/
  packages = [
  	   pkgs.bash
	   pkgs.elixir
	   pkgs.erlang
	   pkgs.postgresql
	   pkgs.hex
	   pkgs.rebar3
  ] ++ lib.optionals pkgs.stdenv.isLinux [ pkgs.inotify-tools pkgs.libnotify ];


  env = {
      PGHOST = "localhost";
      PGPORT = "5432";
      PGUSER= "postgres";
      PGPASSWORD = "postgres";
      ERL_AFLAGS = "-kernel shell_history enabled";
      MIX_REBAR3 = "${pkgs.rebar3.outPath}/bin/rebar3";
  };

  enterShell = ''
      export MIX_HOME="$PWD/.nix-mix"
      export HEX_HOME="$PWD/.nix-hex"
      mkdir -p "$MIX_HOME"
      mkdir -p "$HEX_HOME"
      export ESBUILD_PATH=${pkgs.esbuild}/bin/esbuild
      [[ "$PATH" =~ "$MIX_HOME/bin" ]] || export PATH="$MIX_HOME/bin:$PATH"
      [[ "$PATH" =~ "$HEX_HOME/bin" ]] || export PATH="$HEX_HOME/bin:$PATH"
  '';


  # https://devenv.sh/languages/
  languages.elixir.enable = true;
  # languages.nix.enable = true;

  # https://devenv.sh/pre-commit-hooks/
  # pre-commit.hooks.shellcheck.enable = true;

  # https://devenv.sh/processes/
  # processes.ping.exec = "ping example.com";

  # See full reference at https://devenv.sh/reference/options/
}