octopush/internal/logger/zap.go

package logger

import (
	"os"

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

func New() (*zap.Logger, error) {
	highPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl >= zapcore.ErrorLevel
	})
	lowPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl < zapcore.ErrorLevel // && lvl > zapcore.DebugLevel
	})

	config := zap.NewDevelopmentEncoderConfig()
	config.EncodeTime = nil
	config.EncodeLevel = zapcore.CapitalColorLevelEncoder
	consoleEncoder := zapcore.NewConsoleEncoder(config)
	consoleDebugging := zapcore.Lock(os.Stdout)
	consoleErrors := zapcore.Lock(os.Stderr)

	core := zapcore.NewTee(
		zapcore.NewCore(consoleEncoder, consoleErrors, highPriority),
		zapcore.NewCore(consoleEncoder, consoleDebugging, lowPriority),
	)

	logger := zap.New(core)

	return logger, nil
}