From f16ccb81bbfd284a4755e85f98b3ea174a195d7d Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.uk>
Date: Sat, 26 Aug 2023 23:08:44 +0100
Subject: [PATCH] fix: `extensions` could be null

Warning: Undefined array key "extensions" in /home/opdavies/Code/github.com/OliverDaviesLtd/build-configs/src/Action/CreateFinalConfigurationData.php on line 44

Warning: Trying to access array offset on value of type null in /home/opdavies/Code/github.com/OliverDaviesLtd/build-configs/src/Action/CreateFinalConfigurationData.php on line 44
---
 src/Action/CreateFinalConfigurationData.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Action/CreateFinalConfigurationData.php b/src/Action/CreateFinalConfigurationData.php
index 8ed5d11..5d274b7 100644
--- a/src/Action/CreateFinalConfigurationData.php
+++ b/src/Action/CreateFinalConfigurationData.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Action;
 
+use Illuminate\Support\Arr;
 use Symfony\Component\Yaml\Yaml;
 
 final class CreateFinalConfigurationData
@@ -41,7 +42,7 @@ final class CreateFinalConfigurationData
         $configurationData['dockerfile']['stages']['build']['packages'] = $basePackages;
 
         $configurationData['dockerfile']['stages']['build']['extensions']['install'] = collect($phpExtensions)
-            ->merge($configurationData['dockerfile']['stages']['build']['extensions']['install'])
+            ->merge(Arr::get($configurationData, 'dockerfile.stages.build.extensions.install'))
             ->unique()
             ->sort()
             ->toArray();