Add api command

cmd/sing-box/cmd_api_mode_list.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+var commandAPIModeList = &cobra.Command{
+	Use:   "list",
+	Short: "List clash modes",
+	Args:  cobra.NoArgs,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return runAPIModeList()
+	},
+}
+
+func init() {
+	commandAPIMode.AddCommand(commandAPIModeList)
+}
+
+func runAPIModeList() error {
+	clientConn, client, err := createAPIClient()
+	if err != nil {
+		return err
+	}
+	defer clientConn.Close()
+	modeStatus, err := client.GetClashModeStatus(globalCtx, &emptypb.Empty{})
+	if err != nil {
+		return err
+	}
+	if len(modeStatus.GetModeList()) == 0 {
+		writeStderrLine("no clash modes")
+		return nil
+	}
+	var output strings.Builder
+	for _, mode := range modeStatus.GetModeList() {
+		output.WriteString(mode)
+		output.WriteString("\n")
+	}
+	os.Stdout.WriteString(output.String())
+	return nil
+}