Safe Haskell	None
Language	Haskell2010

Control.Monad.Logger.Extras

Description

Synopsis

runLoggerLoggingT :: LoggingT m a -> Logger -> m a
type LogF = Loc -> LogSource -> LogLevel -> LogStr -> IO ()
newtype Logger = Logger {
- unLogger :: LogF
}
logToStderr :: Logger
logToStdout :: Logger
logToNowhere :: Logger
logToSyslog :: String -> Logger
colorize :: Logger -> Logger
colorizeWith :: [(LogLevel, Color)] -> Logger -> Logger
defaultColors :: [(LogLevel, Color)]
mapLogStrBS :: ToLogStr msg => (ByteString -> msg) -> LogStr -> LogStr
wrapSGRCode :: [SGR] -> ByteString -> ByteString
wrapSGRColor :: Color -> ByteString -> ByteString
test :: IO ()

Documentation

runLoggerLoggingT :: LoggingT m a -> Logger -> m a Source #

Run a LoggingT action using the provided Logger

type LogF = Loc -> LogSource -> LogLevel -> LogStr -> IO () Source #

Type synonym for a logging action. See defaultLogStr for the default formatting of this data.

newtype Logger Source #

A composable logging action.

Constructors

Logger
Fields unLogger :: LogF

Instances

Semigroup Logger Source #
Instance details Defined in Control.Monad.Logger.Extras Methods (<>) :: Logger -> Logger -> Logger # sconcat :: NonEmpty Logger -> Logger # stimes :: Integral b => b -> Logger -> Logger #
Monoid Logger Source #
Instance details Defined in Control.Monad.Logger.Extras Methods mempty :: Logger # mappend :: Logger -> Logger -> Logger # mconcat :: [Logger] -> Logger #

logToStderr :: Logger Source #

Composable stderr logging action.

logToStdout :: Logger Source #

Composable stdout logging action.

logToNowhere :: Logger Source #

This logger doesn't perform any logging action.

logToSyslog :: String -> Logger Source #

Log messages to a posix system log. The string argument is a tag that can be used to identify log messages produced by this logger. You can, for instance, run journalctl --user -t mytag to see log messages tagged with "mytag".

colorize :: Logger -> Logger Source #

Add colors to your log output based on LogLevel. Colors can be customized by using colorizeWith instead.

colorizeWith :: [(LogLevel, Color)] -> Logger -> Logger Source #

Add a custom set of colors to your log output. See defaultColors for an example.

defaultColors :: [(LogLevel, Color)] Source #

The default color mapping used by colorize.

mapLogStrBS :: ToLogStr msg => (ByteString -> msg) -> LogStr -> LogStr Source #

Map a function over a log string.

wrapSGRCode :: [SGR] -> ByteString -> ByteString Source #

Apply SGR codes to a string to modify its display attributes, resetting SGR codes afterward.

wrapSGRColor :: Color -> ByteString -> ByteString Source #

Apply an SGR color code to a string, unsetting the color after the string.

test :: IO () Source #

A handy test