cmd: parse better

internal/cmd/options.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"log/slog"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -36,16 +37,9 @@ var _ goFlags.Unmarshaler = (*decodableBool)(nil)
 // UnmarshalFlag implements the [goFlags.Unmarshaler] interface for
 // *decodableBool.
 func (b *decodableBool) UnmarshalFlag(text string) (err error) {
-	switch text {
-	case "true":
-		b.value = true
-	case "false":
-		b.value = false
-	default:
-		return fmt.Errorf("invalid boolean value: %s", text)
-	}
+	b.value, err = strconv.ParseBool(text)
 
-	return nil
+	return err
 }
 
 // decodableDuration is a duration that can be unmarshaled from a flags.