feat: add zap logger

go.mod

@@ -28,7 +28,7 @@ require (
 	go.opentelemetry.io/otel/sdk/metric v1.26.0
 	go.uber.org/goleak v1.3.0
 	go.uber.org/multierr v1.11.0
-	go.uber.org/zap v1.26.0
+	go.uber.org/zap v1.27.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 

main.go

@@ -4,8 +4,20 @@ import (
 	"log"
 
 	"github.com/EinStack/glide/pkg/cmd"
+	"github.com/EinStack/glide/pkg/telemetry"
+	"go.uber.org/zap"
 )
 
+func init() {
+	config := telemetry.DefaultLogConfig()
+	config.Level = zap.DebugLevel
+	config.Encoding = "console"
+	err := telemetry.InitializeGlobalLogger(config)
+	if err != nil {
+		log.Fatalf("Failed to initialize logger: %v", err)
+	}
+}
+
 //	@title			Glide
 //	@version		0.0.1
 //	@description	API documentation for Glide, an open-source lightweight high-performance model gateway
@@ -24,9 +36,10 @@ import (
 // @BasePath	/
 // @schemes	http
 func main() {
+	logger := telemetry.GetLogger()
 	cli := cmd.NewCLI()
 
 	if err := cli.Execute(); err != nil {
-		log.Fatalf("💥Glide has finished with error: %v", err)
+		logger.Fatal("💥Glide has finished with error", zap.Error(err))
 	}
 }

pkg/cmd/cli.go

@@ -1,9 +1,9 @@
 package cmd
 
 import (
-	"log"
-
+	"github.com/EinStack/glide/pkg/telemetry"
 	"github.com/EinStack/glide/pkg/version"
+	"go.uber.org/zap"
 
 	"github.com/EinStack/glide/pkg/config"
 
@@ -15,6 +15,7 @@ import (
 var (
 	dotEnvFile string
 	cfgFile    string
+	logger     = telemetry.GetLogger()
 )
 
 const Description = `
@@ -49,9 +50,9 @@ func NewCLI() *cobra.Command {
 			err := configProvider.LoadDotEnv(dotEnvFile)
 
 			if err != nil {
-				log.Println("⚠️failed to load dotenv file: ", err) // don't have an inited logger at this moment
+				logger.Warn("⚠️failed to load dotenv file: ", zap.Error(err)) // don't have an inited logger at this moment
 			} else {
-				log.Printf("🔧dot env file is loaded (%v)", dotEnvFile)
+				logger.Info("🔧dot env file is loaded", zap.Any("dotenv", dotEnvFile))
 			}
 
 			_, err = configProvider.Load(cfgFile)

pkg/telemetry/logging.go

@@ -1,6 +1,8 @@
 package telemetry
 
 import (
+	"sync"
+
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
@@ -70,3 +72,38 @@ func NewLogger(cfg *LogConfig) (*zap.Logger, error) {
 
 	return logger, nil
 }
+
+var (
+	globalLogger *zap.Logger
+	loggerMutex  sync.Mutex
+)
+
+// To initialize & check looger only once
+func InitializeGlobalLogger(cfg *LogConfig) error {
+	loggerMutex.Lock()
+	defer loggerMutex.Unlock()
+
+	if globalLogger != nil {
+		return nil
+	}
+
+	logger, err := NewLogger(cfg)
+	if err != nil {
+		return err
+	}
+
+	globalLogger = logger
+	return nil
+}
+
+func GetLogger() *zap.Logger {
+	loggerMutex.Lock()
+	defer loggerMutex.Unlock()
+
+	if globalLogger == nil {
+		cfg := DefaultLogConfig()
+		globalLogger, _ = NewLogger(cfg)
+	}
+
+	return globalLogger
+}