net: clear assets directory on startup (#1213)

Signed-off-by: Abiola Ibrahim <[email protected]>

environment/vm/lima/limautil/files.go

@@ -19,3 +19,8 @@ const networkFile = "networks.yaml"
 func NetworkFile() string {
 	return filepath.Join(config.LimaDir(), "_config", networkFile)
 }
+
+// NetworkAssetsDirecotry returns the directory for the generated network assets.
+func NetworkAssetsDirectory() string {
+	return filepath.Join(config.LimaDir(), "_networks")
+}

environment/vm/lima/limautil/instance.go

@@ -120,6 +120,23 @@ func Instances(ids ...string) ([]InstanceInfo, error) {
 	return instances, nil
 }
 
+// RunningInstances return Lima instances that are has a running status.
+func RunningInstances() ([]InstanceInfo, error) {
+	allInstances, err := Instances()
+	if err != nil {
+		return nil, err
+	}
+
+	var runningInstances []InstanceInfo
+	for _, instance := range allInstances {
+		if instance.Running() {
+			runningInstances = append(runningInstances, instance)
+		}
+	}
+
+	return runningInstances, nil
+}
+
 func getRuntime(conf config.Config) string {
 	var runtime string
 

environment/vm/lima/network.go

@@ -10,6 +10,7 @@ import (
 	"github.com/abiosoft/colima/embedded"
 	"github.com/abiosoft/colima/environment/vm/lima/limautil"
 	"github.com/abiosoft/colima/util"
+	"github.com/sirupsen/logrus"
 )
 
 func (l *limaVM) writeNetworkFile() error {
@@ -19,6 +20,13 @@ func (l *limaVM) writeNetworkFile() error {
 		return fmt.Errorf("error reading embedded network config file: %w", err)
 	}
 
+	// if there are no running instances, clear network directory
+	if instances, err := limautil.RunningInstances(); err == nil && len(instances) == 0 {
+		if err := os.RemoveAll(limautil.NetworkAssetsDirectory()); err != nil {
+			logrus.Warnln(fmt.Errorf("could not clear network assets directory: %w", err))
+		}
+	}
+
 	if err := os.MkdirAll(filepath.Dir(networkFile), 0755); err != nil {
 		return fmt.Errorf("error creating Lima config directory: %w", err)
 	}