Add parse cli

cmd/cmd_parse.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/hiddify/libcore/config"
+	"github.com/sagernet/sing-box/log"
+	"github.com/spf13/cobra"
+)
+
+var commandParseOutputPath string
+
+var commandParse = &cobra.Command{
+	Use:   "parse",
+	Short: "Parse configuration",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		err := parse(args[0])
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	commandParse.Flags().StringVarP(&commandParseOutputPath, "output", "o", "", "write result to file path instead of stdout")
+	mainCommand.AddCommand(commandParse)
+}
+
+func parse(path string) error {
+	if workingDir != "" {
+		path = filepath.Join(workingDir, path)
+	}
+	config, err := config.ParseConfig(path, true)
+	if err != nil {
+		return err
+	}
+	if commandParseOutputPath != "" {
+		outputPath, _ := filepath.Abs(filepath.Join(workingDir, commandParseOutputPath))
+		err = os.WriteFile(outputPath, config, 0777)
+		if err != nil {
+			return err
+		}
+		fmt.Println("result successfully written to ", outputPath)
+	} else {
+		os.Stdout.Write(config)
+	}
+	return nil
+}