Pull request 2303: AGDNS-2505-upd-next

Squashed commit of the following:

commit 586b0eb180afc22d06d673756dd916c17a173361
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Nov 12 19:58:56 2024 +0300

    next: upd more

commit d729aa150f7ac367255830cceca40b8880c51015
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Nov 12 16:53:15 2024 +0300

    next/websvc: upd more

commit 0c64e6cfc66b9212f077b2de7450586fd4d02802
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Mon Nov 11 21:08:51 2024 +0300

    next: upd more

commit 05eec75222360708621c99d3eeac7c8d9f2a5080
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Nov 8 19:20:02 2024 +0300

    next: upd code

internal/next/cmd/log.go

@@ -1,39 +1,39 @@
 package cmd
 
 import (
-	"fmt"
+	"io"
+	"log/slog"
 	"os"
 
-	"github.com/AdguardTeam/AdGuardHome/internal/aghos"
-	"github.com/AdguardTeam/golibs/log"
+	"github.com/AdguardTeam/golibs/logutil/slogutil"
 )
 
-// syslogServiceName is the name of the AdGuard Home service used for writing
-// logs to the system log.
-const syslogServiceName = "AdGuardHome"
-
-// setLog sets up the text logging.
-//
-// TODO(a.garipov): Add parameters from configuration file.
-func setLog(opts *options) (err error) {
+// newBaseLogger constructs a base logger based on the command-line options.
+// opts must not be nil.
+func newBaseLogger(opts *options) (baseLogger *slog.Logger) {
+	var output io.Writer
 	switch opts.confFile {
 	case "stdout":
-		log.SetOutput(os.Stdout)
+		output = os.Stdout
 	case "stderr":
-		log.SetOutput(os.Stderr)
+		output = os.Stderr
 	case "syslog":
-		err = aghos.ConfigureSyslog(syslogServiceName)
-		if err != nil {
-			return fmt.Errorf("initializing syslog: %w", err)
-		}
+		// TODO(a.garipov):  Add a syslog handler to golibs.
 	default:
-		// TODO(a.garipov): Use the path.
+		// TODO(a.garipov):  Use the path.
 	}
 
+	lvl := slog.LevelInfo
 	if opts.verbose {
-		log.SetLevel(log.DEBUG)
-		log.Debug("verbose logging enabled")
+		lvl = slog.LevelDebug
 	}
 
-	return nil
+	return slogutil.New(&slogutil.Config{
+		Output: output,
+		// TODO(a.garipov):  Get from config?
+		Format: slogutil.FormatText,
+		Level:  lvl,
+		// TODO(a.garipov):  Get from config.
+		AddTimestamp: true,
+	})
 }