.envrc

#!/bin/bash

# Add possibility to run a custom envrc that completely overrides the behavior of this envrc.
CUSTOM_ENVRC=.customenvrc
if [ -f "$CUSTOM_ENVRC" ]; then
  echo "Using .customenvrc file"
  source_env $CUSTOM_ENVRC
else
  # Decrease logging output
  # shellcheck disable=SC2034 # unused variable is still read by direnv.
  DIRENV_LOG_FORMAT=
  # Install nix-direnv, which has an improved implementation of `use nix` that
  # caches the Nix environment. Note that this URL is cached locally, so it
  # doesn't fetch the script every time.
  if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
    source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
  fi

  nix_direnv_watch_file nix/sources.json nix/haskell-dependencies.nix
  dotenv

  use nix default.nix --argstr environment shell
fi