Improves application builder

src/Illuminate/Foundation/Application.php

@@ -224,9 +224,11 @@ public function __construct($basePath = null)
      */
     public static function configure(string $baseDirectory = null)
     {
-        $baseDirectory = $ENV['APP_BASE_PATH'] ?? ($baseDirectory ?: dirname(dirname(
-            debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1)[0]['file']
-        )));
+        $baseDirectory = match (true) {
+            is_string($baseDirectory) => $baseDirectory,
+            isset($_ENV['APP_BASE_PATH']) => $_ENV['APP_BASE_PATH'],
+            default => dirname(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1)[0]['file'], 2),
+        };
 
         return (new Configuration\ApplicationBuilder(new static($baseDirectory)))
             ->withKernels()

tests/Foundation/FoundationApplicationBuilderTest.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Illuminate\Tests\Foundation;
+
+use Illuminate\Foundation\Application;
+use Mockery as m;
+use PHPUnit\Framework\TestCase;
+
+class FoundationApplicationBuilderTest extends TestCase
+{
+    protected function tearDown(): void
+    {
+        m::close();
+
+        unset($_ENV['APP_BASE_PATH']);
+
+        parent::tearDown();
+    }
+
+    public function testBaseDirectoryWithArg()
+    {
+        $_ENV['APP_BASE_PATH'] = __DIR__.'/as-env';
+
+        $app = Application::configure(__DIR__.'/as-arg')->create();
+
+        $this->assertSame(__DIR__.'/as-arg', $app->basePath());
+    }
+
+    public function testBaseDirectoryWithEnv()
+    {
+        $_ENV['APP_BASE_PATH'] = __DIR__.'/as-env';
+
+        $app = Application::configure()->create();
+
+        $this->assertSame(__DIR__.'/as-env', $app->basePath());
+    }
+
+    public function testBaseDirectoryWithDebugBacktrace()
+    {
+        $app = Application::configure()->create();
+
+        $this->assertSame(dirname(__DIR__), $app->basePath());
+    }
+}