incus-migrate: Support using the local server

Closes #660

Signed-off-by: Stéphane Graber <stgraber@stgraber.org>

cmd/incus-migrate/main_migrate.go

@@ -113,6 +113,19 @@ func (c *cmdMigrateData) Render() string {
 }
 
 func (c *cmdMigrate) askServer() (incus.InstanceServer, string, error) {
+	// Detect local server.
+	local, err := c.connectLocal()
+	if err == nil {
+		useLocal, err := c.global.asker.AskBool("The local Incus server is the target [default=yes]: ", "yes")
+		if err != nil {
+			return nil, "", err
+		}
+
+		if useLocal {
+			return local, "", nil
+		}
+	}
+
 	// Server address
 	serverURL, err := c.global.asker.AskString("Please provide Incus server URL: ", "", nil)
 	if err != nil {

cmd/incus-migrate/utils.go

@@ -143,6 +143,13 @@ func transferRootfs(ctx context.Context, dst incus.InstanceServer, op incus.Oper
 	return nil
 }
 
+func (m *cmdMigrate) connectLocal() (incus.InstanceServer, error) {
+	args := incus.ConnectionArgs{}
+	args.UserAgent = fmt.Sprintf("LXC-MIGRATE %s", version.Version)
+
+	return incus.ConnectIncusUnix("", &args)
+}
+
 func (m *cmdMigrate) connectTarget(url string, certPath string, keyPath string, authType string, token string) (incus.InstanceServer, string, error) {
 	args := incus.ConnectionArgs{
 		AuthType: authType,