Allow to run Laravel under custom vendor location

src/HandlerResolver.php

@@ -72,13 +72,7 @@ private function laravel(): Application
             return $this->laravel;
         }
 
-        $bootstrapFile = getcwd() . '/bootstrap/app.php';
-
-        if (! file_exists($bootstrapFile)) {
-            throw new RuntimeException(
-                "Unable to locate `{$bootstrapFile}`: Bref tried to load that file to retrieve the Laravel app"
-            );
-        }
+        $bootstrapFile = $this->resolveBootstrapLocation();
 
         $this->laravel = require $bootstrapFile;
 
@@ -96,4 +90,23 @@ private function laravel(): Application
 
         return $this->laravel;
     }
+
+    private function resolveBootstrapLocation(): string
+    {
+        $bootstrapFile = getcwd() . '/bootstrap/app.php';
+
+        if (file_exists($bootstrapFile)) {
+            return $bootstrapFile;
+        }
+
+        // Going up 4 directories will get us from `vendor/brefphp/laravel-bridge/src`
+        // to the Laravel root folder so we can navigate to `bootstrap/app.php`
+        if (file_exists(__DIR__ . '/../../../../bootstrap/app.php')) {
+            return realpath(__DIR__ . '/../../../../bootstrap/app.php');
+        }
+
+        throw new RuntimeException(
+            "Unable to locate `{$bootstrapFile}`: Bref tried to load that file to retrieve the Laravel app"
+        );
+    }
 }

src/bref-init.php

@@ -7,6 +7,8 @@
 use Bref\LaravelBridge\StorageDirectories;
 
 Bref::beforeStartup(static function () {
+    $laravelHome = resolveBootstrapLocation();
+
     if (! defined('STDERR')) {
         define('STDERR', fopen('php://stderr', 'wb'));
     }
@@ -26,7 +28,7 @@
         return;
     }
 
-    $defaultConfigCachePath = $_SERVER['LAMBDA_TASK_ROOT'] . '/bootstrap/cache/config.php';
+    $defaultConfigCachePath = $laravelHome . '/bootstrap/cache/config.php';
 
     if (file_exists($defaultConfigCachePath)) {
         return;
@@ -43,8 +45,20 @@
         fwrite(STDERR, "Running 'php artisan config:cache' to cache the Laravel configuration\n");
 
         // 1>&2 redirects the output to STDERR to avoid messing up HTTP responses with FPM
-        passthru('php artisan config:cache 1>&2');
+        passthru("php {$laravelHome}artisan config:cache 1>&2");
     }
 });
 
 Bref::setContainer(static fn() => new HandlerResolver);
+
+function resolveBootstrapLocation(): string
+{
+    $laravelHome = $_SERVER['LAMBDA_TASK_ROOT'] . '/bootstrap/cache/config.php';
+
+    if (file_exists($laravelHome)) {
+        return $_SERVER['LAMBDA_TASK_ROOT'];
+    }
+
+    // Going up 4 directories will get us from `vendor/brefphp/laravel-bridge/src` to the Laravel root folder
+    return realpath(__DIR__ . '/../../../../');
+}