strict_environment_mode logic

gistfile1.txt

if !strict_environment_mode
  # do like today
else
  if environment was not specified and use_cached_catalog == false
    # do like today
  elif environment was specified and use_cached_catalog == true
    if environment != catalog.environment
      raise
    end
  else # we have only one source of environment, woot
    # use that, skipping node request, and failing if catalog convergence doesn't happen
  end
end