Debug logs a message with debug level.

Debugf logs a formatted message with debug level.

Error logs a message with error level.

Errorf logs a formatted message with error level.

Fatal logs a message with fatal level and exits the program.

Fatalf logs a formatted message with fatal level and exits the program.

FromContext returns a logger from the given context.

Info logs a message with info level.

Infof logs a formatted message with info level.

Warn logs a message with warn level.

Warnf logs a formatted message with warn level.

WithDebug sets the level of the logger to debug.

WithFixedLogger returns a new context with the given fixed logger.

WithFormat sets the format of the logger (text or json).

WithLogger returns a new context with the given logger.

WithQuiet suppresses output to stderr.

WithWriter sets the file to write logs to.

Write writes a message with free form.