fix legacy lvls (#1175)

* fix legacy lvls

* fix simulator logger

cmd/simulator/main/main.go

@@ -11,8 +11,8 @@ import (
 
 	"github.com/ava-labs/subnet-evm/cmd/simulator/config"
 	"github.com/ava-labs/subnet-evm/cmd/simulator/load"
-	"github.com/ava-labs/subnet-evm/utils"
-	"github.com/ethereum/go-ethereum/log"
+	"github.com/ava-labs/subnet-evm/log"
+	gethlog "github.com/ethereum/go-ethereum/log"
 	"github.com/spf13/pflag"
 )
 
@@ -38,12 +38,13 @@ func main() {
 		os.Exit(0)
 	}
 
-	logLevel, err := utils.LvlFromString(v.GetString(config.LogLevelKey))
+	logLevel, err := log.LvlFromString(v.GetString(config.LogLevelKey))
 	if err != nil {
 		fmt.Printf("couldn't parse log level: %s\n", err)
 		os.Exit(1)
 	}
-	log.SetDefault(log.NewLogger(log.NewTerminalHandlerWithLevel(os.Stderr, logLevel, true)))
+	gethLogger := gethlog.NewLogger(log.NewTerminalHandlerWithLevel(os.Stderr, logLevel, true))
+	gethlog.SetDefault(gethLogger)
 
 	config, err := config.BuildConfig(v)
 	if err != nil {

log/logger.go

@@ -2,9 +2,11 @@ package log
 
 import (
 	"context"
+	"fmt"
 	"math"
 	"os"
 	"runtime"
+	"strings"
 	"time"
 
 	"golang.org/x/exp/slog"
@@ -36,6 +38,27 @@ const (
 	LvlDebug = LevelDebug
 )
 
+// LvlFromString returns the appropriate Lvl from a string name.
+// Useful for parsing command line args and configuration files.
+func LvlFromString(lvlString string) (slog.Level, error) {
+	switch strings.ToLower(lvlString) {
+	case "trace", "trce":
+		return LevelTrace, nil
+	case "debug", "dbug":
+		return LevelDebug, nil
+	case "info":
+		return LevelInfo, nil
+	case "warn":
+		return LevelWarn, nil
+	case "error", "eror":
+		return LevelError, nil
+	case "crit":
+		return LevelCrit, nil
+	default:
+		return LvlDebug, fmt.Errorf("unknown level: %v", lvlString)
+	}
+}
+
 // convert from old Geth verbosity level constants
 // to levels defined by slog
 func FromLegacyLevel(lvl int) slog.Level {

plugin/evm/log.go

@@ -11,7 +11,6 @@ import (
 	"strings"
 
 	"github.com/ava-labs/subnet-evm/log"
-	"github.com/ava-labs/subnet-evm/utils"
 	gethlog "github.com/ethereum/go-ethereum/log"
 	"golang.org/x/exp/slog"
 )
@@ -62,7 +61,7 @@ func InitLogger(alias string, level string, jsonFormat bool, writer io.Writer) (
 // SetLogLevel sets the log level of initialized log handler.
 func (s *SubnetEVMLogger) SetLogLevel(level string) error {
 	// Set log level
-	logLevel, err := utils.LvlFromString(level)
+	logLevel, err := log.LvlFromString(level)
 	if err != nil {
 		return err
 	}