Set the paths from which Rails will automatically load source files, and the load_once paths.

Source Code

# File initializer.rb, line 120
def set_autoload_paths
  Dependencies.load_paths = configuration.load_paths.uniq
  Dependencies.load_once_paths = configuration.load_once_paths.uniq

  extra = Dependencies.load_once_paths - Dependencies.load_paths
  unless extra.empty?
    abort "load_once_paths must be a subset of the load_paths.\nExtra items in load_once_paths: \#{extra * ','}\n"
  end

  # Freeze the arrays so future modifications will fail rather than do nothing mysteriously
  configuration.load_once_paths.freeze
end