Critical logs a message using CRITICAL as log level.

Criticalf logs a message using CRITICAL as log level.

Debug logs a message using DEBUG as log level.

Debugf logs a message using DEBUG as log level.

Error logs a message using ERROR as log level.

Errorf logs a message using ERROR as log level.

Fatal is similar to Critical followed by a call to os.Exit(1).

Fatalf is similar to Criticalf followed by a call to os.Exit(1).

Info logs a message using INFO as log level.

Infof logs a message using INFO as log level.

Init logging system which will create a log file or append one.

Instance returns a Logger instance.

Notice logs a message using NOTICE as log level.

Noticef logs a message using NOTICE as log level.

Panic is similar to Critical followed by a call to panic().

Panicf is similar to Criticalf followed by a call to panic().

Warning logs a message using WARNING as log level.

Warningf logs a message using WARNING as log level.