From a7c74eac78c0b4bdfd165e832234d803ed1faba3 Mon Sep 17 00:00:00 2001
From: Axel Rutz <axel.rutz@machbarmacher.net>
Date: Tue, 8 Oct 2019 00:18:28 +0200
Subject: [PATCH] Allow alias without root, closes drush-ops/drush#4059

---
 src/SiteAliasTrait.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SiteAliasTrait.php b/src/SiteAliasTrait.php
index 7b79fb8..4b5c14d 100644
--- a/src/SiteAliasTrait.php
+++ b/src/SiteAliasTrait.php
@@ -27,7 +27,7 @@ public function hasRoot()
     public function root()
     {
         if (!$this->hasRoot()) {
-            throw new \Exception('Site alias ' . $this->name . ' does not specify a root.');
+            return NULL;
         }
         $root = $this->get('root');
         if ($this->isLocal()) {