Example helper for creating a new zap.Logger instance that logs to stderr without the caller/stacktrace.

zaplog.go

package zaplog

import (
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
)

// https://github.com/uber-go/zap/blob/master/config.go#L40-L127
// For testing use https://godoc.org/go.uber.org/zap#NewNop

// Usage:
// 	zaplogger, err := zaplog.NewProductionZapLogger()
// 	if err != nil {
// 		log.Fatal(err)
// 	}
// 	defer zaplogger.Sync()
// 	logger := zaplogger.Sugar()

// NewProductionZapLogger instance
func NewProductionZapLogger() (*zap.Logger, error) {
	cfg := zap.Config{
		Level:            zap.NewAtomicLevelAt(zapcore.DebugLevel),
		Encoding:         "json",
		OutputPaths:      []string{"stderr"},
		ErrorOutputPaths: []string{"stderr"},
		EncoderConfig: zapcore.EncoderConfig{
			MessageKey: "msg",

			TimeKey:    "ts",
			EncodeTime: zapcore.ISO8601TimeEncoder,

			LevelKey:    "level",
			EncodeLevel: zapcore.CapitalLevelEncoder,
		},
		DisableStacktrace: true,
		DisableCaller:     true,
	}

	logger, err := cfg.Build()
	if err != nil {
		return nil, err
	}

	return logger, nil
}