Replace zap logger with slog

[rbdr/mobius] / cmd / mobius-hotline-server / main.go

diff --git a/cmd/mobius-hotline-server/main.go b/cmd/mobius-hotline-server/main.go
index 2bda39bf3a1bbfeebd8963bc5b7ab1df43989da3..c027d187c55e3555b9d2820ddcb52253b1ed5196 100644 (file)
--- a/cmd/mobius-hotline-server/main.go
+++ b/cmd/mobius-hotline-server/main.go
@@ -7,11 +7,10 @@ import (
        "flag"
        "fmt"
        "github.com/jhalter/mobius/hotline"
-       "go.uber.org/zap"
-       "go.uber.org/zap/zapcore"
        "gopkg.in/natefinch/lumberjack.v2"
        "io"
        "log"
+       "log/slog"
        "net/http"
        "os"
        "path/filepath"
@@ -21,9 +20,13 @@ import (
 //go:embed mobius/config
 var cfgTemplate embed.FS
 
-const (
-       defaultPort = 5500
-)
+const defaultPort = 5500
+
+var logLevels = map[string]slog.Level{
+       "debug": slog.LevelDebug,
+       "info":  slog.LevelInfo,
+       "error": slog.LevelError,
+}
 
 func main() {
        ctx, cancel := context.WithCancel(context.Background())
@@ -60,46 +63,44 @@ func main() {
                os.Exit(0)
        }
 
-       zapLvl, ok := zapLogLevel[*logLevel]
-       if !ok {
-               fmt.Printf("Invalid log level %s.  Must be debug, info, warn, or error.\n", *logLevel)
-               os.Exit(0)
-       }
-
-       cores := []zapcore.Core{
-               newStdoutCore(zapLvl),
-       }
-
-       if *logFile != "" {
-               cores = append(cores, newLogFileCore(*logFile, zapLvl))
-       }
-
-       l := zap.New(zapcore.NewTee(cores...))
-       defer func() { _ = l.Sync() }()
-       logger := l.Sugar()
+       slogger := slog.New(
+               slog.NewTextHandler(
+                       io.MultiWriter(os.Stdout, &lumberjack.Logger{
+                               Filename:   *logFile,
+                               MaxSize:    100, // MB
+                               MaxBackups: 3,
+                               MaxAge:     365, // days
+                       }),
+                       &slog.HandlerOptions{Level: logLevels[*logLevel]},
+               ),
+       )
 
        if *init {
                if _, err := os.Stat(filepath.Join(*configDir, "/config.yaml")); os.IsNotExist(err) {
                        if err := os.MkdirAll(*configDir, 0750); err != nil {
-                               logger.Fatal(err)
+                               slogger.Error(fmt.Sprintf("error creating config dir: %s", err))
+                               os.Exit(1)
                        }
 
                        if err := copyDir("mobius/config", *configDir); err != nil {
-                               logger.Fatal(err)
+                               slogger.Error(fmt.Sprintf("error copying config dir: %s", err))
+                               os.Exit(1)
                        }
-                       logger.Infow("Config dir initialized at " + *configDir)
+                       slogger.Info("Config dir initialized at " + *configDir)
                } else {
-                       logger.Infow("Existing config dir found.  Skipping initialization.")
+                       slogger.Info("Existing config dir found.  Skipping initialization.")
                }
        }
 
        if _, err := os.Stat(*configDir); os.IsNotExist(err) {
-               logger.Fatalw("Configuration directory not found.  Correct the path or re-run with -init to generate initial config.", "path", configDir)
+               slogger.Error(fmt.Sprintf("Configuration directory not found.  Correct the path or re-run with -init to generate initial config."))
+               os.Exit(1)
        }
 
-       srv, err := hotline.NewServer(*configDir, *netInterface, *basePort, logger, &hotline.OSFileStore{})
+       srv, err := hotline.NewServer(*configDir, *netInterface, *basePort, slogger, &hotline.OSFileStore{})
        if err != nil {
-               logger.Fatal(err)
+               slogger.Error(fmt.Sprintf("Error starting server: %s", err))
+               os.Exit(1)
        }
 
        sh := statHandler{hlServer: srv}
@@ -116,7 +117,7 @@ func main() {
        }
 
        // Serve Hotline requests until program exit
-       logger.Fatal(srv.ListenAndServe(ctx, cancel))
+       log.Fatal(srv.ListenAndServe(ctx, cancel))
 }
 
 type statHandler struct {
@@ -132,43 +133,6 @@ func (sh *statHandler) RenderStats(w http.ResponseWriter, _ *http.Request) {
        _, _ = io.WriteString(w, string(u))
 }
 
-func newStdoutCore(level zapcore.Level) zapcore.Core {
-       encoderCfg := zap.NewProductionEncoderConfig()
-       encoderCfg.TimeKey = "timestamp"
-       encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder
-
-       return zapcore.NewCore(
-               zapcore.NewConsoleEncoder(encoderCfg),
-               zapcore.Lock(os.Stdout),
-               level,
-       )
-}
-
-func newLogFileCore(path string, level zapcore.Level) zapcore.Core {
-       encoderCfg := zap.NewProductionEncoderConfig()
-       encoderCfg.TimeKey = "timestamp"
-       encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder
-       writer := zapcore.AddSync(&lumberjack.Logger{
-               Filename:   path,
-               MaxSize:    100, // MB
-               MaxBackups: 3,
-               MaxAge:     365, // days
-       })
-
-       return zapcore.NewCore(
-               zapcore.NewConsoleEncoder(encoderCfg),
-               writer,
-               level,
-       )
-}
-
-var zapLogLevel = map[string]zapcore.Level{
-       "debug": zap.DebugLevel,
-       "info":  zap.InfoLevel,
-       "warn":  zap.WarnLevel,
-       "error": zap.ErrorLevel,
-}
-
 func defaultConfigPath() (cfgPath string) {
        switch runtime.GOOS {
        case "windows":