func initLogging()

in main.go [100:146]
39 lines of code
6 McCabe index (conditional complexity)

func initLogging(level string) {
	var logger *zap.Logger
	var err error
	errorPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl >= zapcore.ErrorLevel
	})

	minLogLevel := zapcore.InfoLevel
	switch strings.ToUpper(level) {
	case "DEBUG":
		minLogLevel = zapcore.DebugLevel
	case "INFO":
		minLogLevel = zapcore.InfoLevel
	case "WARN":
		minLogLevel = zapcore.WarnLevel
	case "ERROR":
		minLogLevel = zapcore.ErrorLevel
	}

	infoPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl < zapcore.ErrorLevel && lvl >= minLogLevel
	})

	consoleErrors := zapcore.Lock(os.Stderr)
	consoleInfo := zapcore.Lock(os.Stdout)

	encoderConf := zap.NewDevelopmentEncoderConfig()
	encoderConf.EncodeLevel = zapcore.CapitalColorLevelEncoder
	consoleEncoder := zapcore.NewConsoleEncoder(encoderConf)

	core := zapcore.NewTee(
		zapcore.NewCore(consoleEncoder, consoleErrors, errorPriority),
		zapcore.NewCore(consoleEncoder, consoleInfo, infoPriority),
	)

	stackTraceEnabler := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl > zapcore.ErrorLevel
	})
	logger = zap.New(core, zap.AddStacktrace(stackTraceEnabler))

	if err != nil {
		zap.S().Fatalw("Failed to create logger", "error", err)
	}

	zap.ReplaceGlobals(logger.Named("crd-ref-docs"))
	zap.RedirectStdLog(logger.Named("stdlog"))
}