From 3d632a4441fa612a6f85ca0c43b355545caf1cb6 Mon Sep 17 00:00:00 2001
From: Nico Stapelbroek <nstapelbroek@gmail.com>
Date: Sun, 25 Nov 2018 16:45:49 +0100
Subject: [PATCH] Add support for empty values in the persistEnv method

---
 app/Console/Commands/InstallCommand.php | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/app/Console/Commands/InstallCommand.php b/app/Console/Commands/InstallCommand.php
index 1ece3958..6ecc26ce 100644
--- a/app/Console/Commands/InstallCommand.php
+++ b/app/Console/Commands/InstallCommand.php
@@ -389,11 +389,12 @@ class InstallCommand extends Command
             $envKey = strtoupper($key);
             $envValue = env($envKey) ?: 'null';
 
-            file_put_contents($path, str_replace(
-                "{$envKey}={$envValue}",
-                "{$envKey}={$value}",
-                file_get_contents($path)
-            ));
+            $envFileContents = file_get_contents($path);
+            $envFileContents = str_replace("{$envKey}={$envValue}", "{$envKey}={$value}", $envFileContents, $count);
+            if ($count < 1 && $envValue === 'null') {
+                $envFileContents = str_replace("{$envKey}=", "{$envKey}={$value}", $envFileContents);
+            }
+            file_put_contents($path, $envFileContents);
         } catch (InvalidPathException $e) {
             throw $e;
         }