postgres settings fact

gistfile1.pp

def pg_setting(setting)
  Facter.add("pg_" + setting) do
    setcode do
      if File.exists? "/usr/bin/psql"
        setting = Facter::Util::Resolution.exec("sudo -u postgres psql -U postgres -d postgres -qtAXc \"select current_setting('#{setting}')\"")
      end
    end
  end
end

settings = [
  'archive_command',
  'archive_mode',
  'cpu_tuple_cost',
  'datestyle',
  'effective_cache_size',
  'effective_io_concurrency',
  'log_line_prefix',
  'logging_collector',
  'maintenance_work_mem',
  'max_connections',
  'random_page_cost',
  'shared_buffers',
  'timezone',
  'track_activity_query_size',
  'work_mem',
  'data_directory',
  'server_version'
]

settings.each do |setting|
  pg_setting(setting)
end