Env inits environment names for flags.

Name sets application name.

Path sets configuration pathes.

Run executes the Run() method on the selected command, which must exist.

Version sets application version.

DebugLevel defines debug log level.

Disabled disables the logger.

ErrorLevel defines error log level.

FatalLevel defines fatal log level.

InfoLevel defines info log level.

NoLevel defines an absent log level.

PanicLevel defines panic log level.

TraceLevel defines trace log level.

WarnLevel defines warn log level.