added yamltool sort

cmd/yamltool/merge.go

@@ -2,10 +2,11 @@ package main
 
 import (
 	"fmt"
-	"github.com/goccy/go-yaml"
-	"github.com/spf13/cobra"
 	"os"
 	"reflect"
+
+	"github.com/goccy/go-yaml"
+	"github.com/spf13/cobra"
 )
 
 type MyMap yaml.MapSlice
@@ -54,7 +55,11 @@ func mergeMap(yaml1 yaml.MapSlice, yaml2 yaml.MapSlice) yaml.MapSlice {
 func merge(cmd *cobra.Command, args []string) error {
 	res := make(yaml.MapSlice, 0)
 	for _, arg := range args {
-		config, err := parse(read(arg))
+		data, err := read(arg)
+		if err != nil {
+			return err
+		}
+		config, err := parse(data)
 		if err != nil {
 			return fmt.Errorf("%s: %w", arg, err)
 		}