add clean command

pkg/cmd/clean.go

@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"github.com/ryota-sakamoto/kubernetes-on-multipass/pkg/provisioner"
+	"github.com/spf13/cobra"
+)
+
+var cleanCmd = &cobra.Command{
+	Use:   "clean",
+	Short: "Clean up a cluster",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return provisioner.Clean(cmd.Flag("cluster-name").Value.String())
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(cleanCmd)
+	cleanCmd.Flags().StringP("cluster-name", "", "kubernetes", "Cluster name")
+}

pkg/multipass/multipass.go

@@ -62,6 +62,24 @@ func LaunchInstance(config InstanceConfig, cloudinit string) error {
 	return err
 }
 
+func DeleteInstance(name string) error {
+	_, err := exec.Command("multipass", "delete", name).Output()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func Purge() error {
+	_, err := exec.Command("multipass", "purge").Output()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func Exec(name string, command string) (string, error) {
 	args := []string{"exec", name, "--"}
 	args = append(args, strings.Fields(command)...)

pkg/provisioner/cluster.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log/slog"
 	"os"
+	"strings"
 
 	"github.com/goccy/go-yaml"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -148,3 +149,27 @@ func GenerateKubeconfig(name string) error {
 
 	return nil
 }
+
+func Clean(clusterName string) error {
+	slog.Debug("clean", slog.String("clusterName", clusterName))
+
+	instances, err := multipass.ListInstances()
+	if err != nil {
+		return fmt.Errorf("failed to list instances: %w", err)
+	}
+
+	for _, instance := range instances.List {
+		if !strings.HasPrefix(instance.Name, clusterName) {
+			continue
+		}
+
+		slog.Debug("delete instance", slog.String("name", instance.Name))
+		err := multipass.DeleteInstance(instance.Name)
+		if err != nil {
+			return fmt.Errorf("failed to delete instance: %w", err)
+		}
+	}
+
+	slog.Debug("purge instances")
+	return multipass.Purge()
+}