add machine list command and corresponding RPC endpoint

cmd/uncloud/machine/list.go

@@ -0,0 +1,24 @@
+package machine
+
+import (
+	"github.com/spf13/cobra"
+	"uncloud/internal/cli"
+)
+
+func NewListCommand() *cobra.Command {
+	opts := addOptions{}
+	cmd := &cobra.Command{
+		Use:     "list",
+		Aliases: []string{"ls"},
+		Short:   "List machines in a cluster",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return uncli.ListMachines(cmd.Context(), opts.cluster)
+		},
+	}
+	cmd.Flags().StringVarP(
+		&opts.cluster, "cluster", "c", "",
+		"Name of the cluster (default is the current cluster)",
+	)
+	return cmd
+}

cmd/uncloud/machine/root.go

@@ -12,6 +12,7 @@ func NewRootCommand() *cobra.Command {
 	cmd.AddCommand(
 		NewAddCommand(),
 		NewInitCommand(),
+		NewListCommand(),
 		NewTokenCommand(),
 	)
 	return cmd