# From https://github.com/direnv/direnv/wiki/Ruby#-chruby
use_chruby() {
  local version
  version="${1}"

  [[ "${version}" == --auto ]] && version="$(read_version_file .ruby-version)"
  [[ -z "${version}" ]] && return

  local chruby

  if has brew; then
    local brew_prefix
    brew_prefix="$(brew --prefix)"

    if [[ -e "${brew_prefix}/opt/chruby/share/chruby/chruby.sh" ]]; then
      chruby="${brew_prefix}/opt/chruby/share/chruby/chruby.sh"
    fi
  fi

  [[ -z "${chruby}" ]] && [[ -e /usr/local/share/chruby/chruby.sh ]] &&
    chruby=/usr/local/share/chruby/chruby.sh

  [[ -z "${chruby}" ]] && return

  source "${chruby}"
  chruby "${version}"
}

# From https://github.com/direnv/direnv/wiki/Find-Up-with-Alternates
find_up_()
{
  (
    while true; do
      for v in "${@}"; do
        if [[ -f "${v}" ]]; then
          echo "${PWD}/${v}"
          return 0
        fi
      done

      if [[ "${PWD}" == / ]] || [[ "${PWD}" == // ]]; then
        return 1
      fi

      cd ..
    done
  )
}

read_version_file()
{
  local file
  file="$(find_up_ "${@}")"

  [[ -z "${file}" ]] && return

  watch_file "${file}"
  ruby -e "puts ARGF.readline" 2> /dev/null "${file}"
}

# From https://github.com/direnv/direnv/wiki/Node#using-nvm
use_nvm() {
  local node_version="$1"

  source "${NVM_DIR}/nvm.sh"

  # This automatically does `nvm use` afterward.
  nvm install "$node_version"
}

# From https://github.com/direnv/direnv/wiki/Python#poetry
layout_poetry() {
  if [[ ! -f pyproject.toml ]]; then
    log_error 'No pyproject.toml found. Use `poetry new` or `poetry init` to create one first.'
    exit 2
  fi

  # Create venv if it doesn't exist
  poetry run true

  export VIRTUAL_ENV="$(poetry env info --path)"
  export POETRY_ACTIVE=1
  PATH_add "$VIRTUAL_ENV/bin"
}