merge ucind cluster configuration to the user’s uncloud config

cmd/ucind/main.go

@@ -5,11 +5,14 @@ import (
 	"fmt"
 	"github.com/docker/docker/client"
 	"github.com/spf13/cobra"
+	"os"
+	"strings"
 	"uncloud/cmd/ucind/cluster"
 	"uncloud/internal/ucind"
 )
 
 func main() {
+	var configPath string
 	cmd := &cobra.Command{
 		Use:   "ucind",
 		Short: "A CLI tool for running Uncloud test clusters using Docker.",
@@ -24,13 +27,27 @@ func main() {
 				return fmt.Errorf("create Docker client: %w", err)
 			}
 
-			p := ucind.NewProvisioner(cli)
+			if strings.HasPrefix(configPath, "~/") {
+				home, err := os.UserHomeDir()
+				if err != nil {
+					return fmt.Errorf("get user home directory to resolve %q: %w", configPath, err)
+				}
+				configPath = strings.Replace(configPath, "~", home, 1)
+			}
+			configUpdater := ucind.NewConfigUpdater(configPath)
+
+			p := ucind.NewProvisioner(cli, configUpdater)
 			// Persist the provisioner in the context so it can be used by subcommands.
 			cmd.SetContext(context.WithValue(cmd.Context(), "provisioner", p))
 			return nil
 		},
 	}
 
+	// TODO: allow to override using UNCLOUD_CONFIG env var.
+	cmd.PersistentFlags().StringVar(&configPath, "uncloud-config", "~/.config/uncloud/config.toml",
+		"path to the Uncloud configuration file.")
+	_ = cmd.MarkPersistentFlagFilename("uncloud-config", "toml")
+
 	cmd.AddCommand(
 		cluster.NewRootCommand(),
 	)