defmodule Meld.Util do
  @moduledoc """
    Exposes some helpful functions to the rest of the codebase.
  """

  @doc """
    Checks if the ~/.meld directory exists.
  """
  def check_dir_exists(ifnot) do
    if File.exists? path do
      raise ifnot
      exit ""
    end
  end

  @doc """
    Checks if the ~/.meld directory DOESN'T exist.
  """
  def check_dir_not_exists(ifnot) do
    if !File.exists? path do
      raise ifnot
      exit ""
    end
  end

  @doc """
    Creates the ~/.meld directory.
  """
  def create_dir do
    path
    |> File.mkdir_p!
  end

  @doc """
    Returns the full ~/.meld path.
  """
  def path, do: Path.expand "~/.meld"
end