lnd+rpcserver: initialize new log writer correctly

config.go

@@ -951,27 +951,32 @@ func loadConfig() (*config, error) {
 		normalizeNetwork(activeNetParams.Name))
 
 	// Special show command to list supported subsystems and exit.
-	/*TODO(guggero) fix
 	if cfg.DebugLevel == "show" {
-		fmt.Println("Supported subsystems", supportedSubsystems())
+		fmt.Println("Supported subsystems",
+			logWriter.SupportedSubsystems())
 		os.Exit(0)
-	}*/
+	}
 
 	// Initialize logging at the default logging level.
-	/*TODO(guggero) fix
-	initLogRotator(
+	err = logWriter.InitLogRotator(
 		filepath.Join(cfg.LogDir, defaultLogFilename),
 		cfg.MaxLogFileSize, cfg.MaxLogFiles,
-	)*/
+	)
+	if err != nil {
+		str := "%s: log rotation setup failed: %v"
+		err = fmt.Errorf(str, funcName, err.Error())
+		fmt.Fprintln(os.Stderr, err)
+		return nil, err
+	}
 
 	// Parse, validate, and set debug log level(s).
-	/*TODO(guggero) fix
-	if err := parseAndSetDebugLevels(cfg.DebugLevel); err != nil {
-		err := fmt.Errorf("%s: %v", funcName, err.Error())
+	err = build.ParseAndSetDebugLevels(cfg.DebugLevel, logWriter)
+	if err != nil {
+		err = fmt.Errorf("%s: %v", funcName, err.Error())
 		fmt.Fprintln(os.Stderr, err)
 		fmt.Fprintln(os.Stderr, usageMessage)
 		return nil, err
-	}*/
+	}
 
 	// At least one RPCListener is required. So listen on localhost per
 	// default.

lnd.go

@@ -125,10 +125,10 @@ func Main(lisCfg ListenerCfg) error {
 	cfg = loadedConfig
 	defer func() {
 		ltndLog.Info("Shutdown complete")
-		/* TODO(guggero) fix after refactor
-		if logRotator != nil {
-			logRotator.Close()
-		}*/
+		err := logWriter.Close()
+		if err != nil {
+			ltndLog.Errorf("Could not close log rotator: %v", err)
+		}
 	}()
 
 	// Show version at startup.

rpcserver.go

@@ -12,6 +12,7 @@ import (
 	"net"
 	"net/http"
 	"sort"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -4342,7 +4343,9 @@ func (r *rpcServer) DebugLevel(ctx context.Context,
 	// sub-systems.
 	if req.Show {
 		return &lnrpc.DebugLevelResponse{
-			SubSystems: "", //TODO(guggero) fix strings.Join(supportedSubsystems(), " "),
+			SubSystems: strings.Join(
+				logWriter.SupportedSubsystems(), " ",
+			),
 		}, nil
 	}
 
@@ -4350,11 +4353,10 @@ func (r *rpcServer) DebugLevel(ctx context.Context,
 
 	// Otherwise, we'll attempt to set the logging level using the
 	// specified level spec.
-	/*TODO(guggero) fix
-	if err := parseAndSetDebugLevels(req.LevelSpec); err != nil {
+	err := build.ParseAndSetDebugLevels(req.LevelSpec, logWriter)
+	if err != nil {
 		return nil, err
 	}
-	*/
 
 	return &lnrpc.DebugLevelResponse{}, nil
 }