chore: switch to slog for logging (#242)

Fixes #214

cmd/bluefin/main.go

@@ -17,20 +17,21 @@ package main
 import (
 	"flag"
 	"fmt"
+	"log/slog"
 	"os"
 
 	_ "go.uber.org/automaxprocs"
 
 	"github.com/blinklabs-io/bluefin/internal/config"
 	"github.com/blinklabs-io/bluefin/internal/indexer"
-	"github.com/blinklabs-io/bluefin/internal/logging"
 	"github.com/blinklabs-io/bluefin/internal/storage"
 	"github.com/blinklabs-io/bluefin/internal/version"
 	"github.com/blinklabs-io/bluefin/internal/wallet"
 )
 
 var cmdlineFlags struct {
 	configFile string
+	debug      bool
 }
 
 func main() {
@@ -40,6 +41,12 @@ func main() {
 		"",
 		"path to config file to load",
 	)
+	flag.BoolVar(
+		&cmdlineFlags.debug,
+		"debug",
+		false,
+		"enable debug logging",
+	)
 	flag.Parse()
 
 	// Load config
@@ -49,36 +56,48 @@ func main() {
 		os.Exit(1)
 	}
 
-	// Configure logging
-	logging.Setup()
-	logger := logging.GetLogger()
-	// Sync logger on exit
-	defer func() {
-		if err := logger.Sync(); err != nil {
-			// We don't actually care about the error here, but we have to do something
-			// to appease the linter
-			return
-		}
-	}()
+	// Configure logger
+	logLevel := slog.LevelInfo
+	if cmdlineFlags.debug {
+		logLevel = slog.LevelDebug
+	}
+	logger := slog.New(
+		slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+			Level: logLevel,
+		}),
+	)
+	slog.SetDefault(logger)
 
-	logger.Infof("bluefin %s started", version.GetVersionString())
+	slog.Info(
+		fmt.Sprintf("bluefin %s started", version.GetVersionString()),
+	)
 	// Load storage
 	if err := storage.GetStorage().Load(); err != nil {
-		logger.Fatalf("failed to load storage: %s", err)
+		slog.Error(
+			fmt.Sprintf("failed to load storage: %s", err),
+		)
+		os.Exit(1)
 	}
 
 	// Setup wallet
 	wallet.Setup()
 	bursa := wallet.GetWallet()
-	logger.Infof("loaded mnemonic for address: %s", bursa.PaymentAddress)
+	slog.Info(
+		fmt.Sprintf("loaded mnemonic for address: %s", bursa.PaymentAddress),
+	)
 
 	// Fake Tx
 	//tx.SendTx([]byte("foo"))
 
 	// Start indexer
-	logger.Infof("starting indexer on %s", cfg.Network)
+	slog.Info(
+		fmt.Sprintf("starting indexer on %s", cfg.Network),
+	)
 	if err := indexer.GetIndexer().Start(); err != nil {
-		logger.Fatalf("failed to start indexer: %s", err)
+		slog.Error(
+			fmt.Sprintf("failed to start indexer: %s", err),
+		)
+		os.Exit(1)
 	}
 
 	// Wait forever

go.mod

@@ -13,7 +13,6 @@ require (
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/minio/sha256-simd v1.0.1
 	go.uber.org/automaxprocs v1.5.3
-	go.uber.org/zap v1.27.0
 	golang.org/x/crypto v0.25.0
 	gopkg.in/yaml.v2 v2.4.0
 )
@@ -62,6 +61,7 @@ require (
 	github.com/x448/float16 v0.8.4 // indirect
 	go.opencensus.io v0.22.5 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/exp v0.0.0-20240404231335-c0f41cb1a7a0 // indirect
 	golang.org/x/net v0.25.0 // indirect
 	golang.org/x/sys v0.22.0 // indirect

internal/config/config.go

@@ -31,7 +31,6 @@ type Config struct {
 	Submit       SubmitConfig  `yaml:"submit"`
 	Wallet       WalletConfig  `yaml:"wallet"`
 	Miner        MinerConfig   `yaml:"miner"`
-	Logging      LoggingConfig `yaml:"logging"`
 	Metrics      MetricsConfig `yaml:"metrics"`
 	Debug        DebugConfig   `yaml:"debug"`
 	Profile      string        `yaml:"profile" envconfig:"PROFILE"`
@@ -68,11 +67,6 @@ type MinerConfig struct {
 	Message          string `yaml:"message" envconfig:"MINER_MESSAGE"`
 }
 
-type LoggingConfig struct {
-	Healthchecks bool   `yaml:"healthchecks" envconfig:"LOGGING_HEALTHCHECKS"`
-	Level        string `yaml:"level"        envconfig:"LOGGING_LEVEL"`
-}
-
 type MetricsConfig struct {
 	ListenAddress string `yaml:"address" envconfig:"METRICS_LISTEN_ADDRESS"`
 	ListenPort    uint   `yaml:"port"    envconfig:"METRICS_LISTEN_PORT"`
@@ -85,10 +79,6 @@ type DebugConfig struct {
 
 // Singleton config instance with default values
 var globalConfig = &Config{
-	Logging: LoggingConfig{
-		Level:        "info",
-		Healthchecks: false,
-	},
 	Debug: DebugConfig{
 		ListenAddress: "localhost",
 		ListenPort:    0,