--- /dev/null
+<?php
+
+use Symfony\Component\Yaml\Dumper;
+
+/**
+ * Output formatter 'yaml'
+ *
+ * @param $data
+ * The $data parameter is rendered in yaml
+ * @param $metadata
+ *
+ * Code:
+ *
+ */
+class drush_outputformat_yaml extends drush_outputformat {
+ function format($input, $metadata) {
+ $dumper = new Dumper();
+ // Set Yaml\Dumper's default indentation for nested nodes/collections to
+ // 2 spaces for consistency with Drupal coding standards.
+ $dumper->setIndentation(2);
+ // The level where you switch to inline YAML is set to PHP_INT_MAX to
+ // ensure this does not occur.
+ $output = $dumper->dump($input, PHP_INT_MAX, NULL, NULL, TRUE);
+ return $output;
+ }
+}