zap

type Options struct {
	// Development configures the logger to use a Zap development config
	// (stacktraces on warnings, no sampling), otherwise a Zap production
	// config will be used (stacktraces on errors, sampling).
	Development bool `mapstructure:"zap-devel"`

	// Encoder configures how Zap will encode the output.  Defaults to
	// console when Development is true and JSON otherwise
	Encoder zapcore.Encoder

	// EncoderConfigOptions can modify the EncoderConfig needed to initialize an Encoder.
	// See https://pkg.go.dev/go.uber.org/zap/zapcore#EncoderConfig for the list of options
	// that can be configured.
	// Note that the EncoderConfigOptions are not applied when the Encoder option is already set.
	EncoderConfigOptions []crzap.EncoderConfigOption

	// NewEncoder configures Encoder using the provided EncoderConfigOptions.
	// Note that the NewEncoder function is not used when the Encoder option is already set.
	NewEncoder crzap.NewEncoderFunc `mapstructure:"zap-encoder"`

	// DestWriter controls the destination of the log output.  Defaults to
	// os.Stderr.
	DestWriter io.Writer

	// Level configures the verbosity of the logging.
	// Defaults to Debug when Development is true and Info otherwise.
	// A zap log level should be multiplied by -1 to get the logr verbosity.
	// For example, to get logr verbosity of 3, set this field to zapcore.Level(-3).
	// See https://pkg.go.dev/github.com/go-logr/zapr for how zap level relates to logr verbosity.
	Level zapcore.LevelEnabler `mapstructure:"zap-log-level"`

	// StacktraceLevel is the level at and above which stacktraces will
	// be recorded for all messages. Defaults to Warn when Development
	// is true and Error otherwise.
	// See Level for the relationship of zap log level to logr verbosity.
	StacktraceLevel zapcore.LevelEnabler `mapstructure:"zap-stacktrace-level"`

	// ZapOpts allows passing arbitrary zap.Options to configure on the
	// underlying Zap logger.
	ZapOpts []zap.Option

	// TimeEncoder specifies the encoder for the timestamps in log messages.
	// Defaults to RFC3339TimeEncoder.
	TimeEncoder zapcore.TimeEncoder `mapstructure:"zap-time-encoding"`
}