--- /dev/null
+<?php
+
+namespace Drush\Boot;
+
+use Psr\Log\LoggerInterface;
+
+/**
+ * This is a do-nothing 'Boot' class that is used when there
+ * is no site at --root, or when no root is specified.
+ *
+ * The 'empty' boot must be careful to never change state,
+ * in case bootstrap code might later come along and set
+ * a site (e.g. in command completion).
+ */
+class EmptyBoot extends BaseBoot
+{
+
+ public function validRoot($path)
+ {
+ return false;
+ }
+
+ public function bootstrapPhases()
+ {
+ return [
+ DRUSH_BOOTSTRAP_DRUSH => '_drush_bootstrap_drush',
+ ];
+ }
+
+ public function bootstrapInitPhases()
+ {
+ return [DRUSH_BOOTSTRAP_DRUSH];
+ }
+}