SFTP support

src/Plugin/file_sync/FTPDirectorySync.php

@@ -97,6 +97,15 @@ class FTPDirectorySync extends OperationPluginBase {
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
     $form = parent::buildConfigurationForm($form, $form_state);
     $settings = $this->getEntity()->getPluginSettings();
+    $form['connection'] = [
+      '#type' => 'radios',
+      '#title' => $this->t('Connection type'),
+      '#default_value' => $settings['connection'] ?? 'ftp',
+      '#options' => [
+        'ftp' => $this->t('FTP'),
+        'sftp' => $this->t('SFTP'),
+      ],
+    ];
     $form['username'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Username'),
@@ -144,7 +153,7 @@ class FTPDirectorySync extends OperationPluginBase {
     $form['passive'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Passive'),
-      '#description' => $this->t('Use passive FTP connection.'),
+      '#description' => $this->t('Use passive FTP connection (not supported by SFTP).'),
       '#default_value' => $settings['passive'] ?? 1,
     ];
     $form['log'] = [