[11.x] Improves Application::configure method (#49552)

* Improves application builder

* [11.x] Infers base path from composer instead (#49553)

* Uses composer instead of `debug_backtrace`

* Removes non used import

src/Illuminate/Foundation/Application.php

@@ -3,6 +3,7 @@
 namespace Illuminate\Foundation;
 
 use Closure;
+use Composer\Autoload\ClassLoader;
 use Illuminate\Container\Container;
 use Illuminate\Contracts\Console\Kernel as ConsoleKernelContract;
 use Illuminate\Contracts\Foundation\Application as ApplicationContract;
@@ -224,16 +225,30 @@ 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,
+            default => static::inferBaseDirectory(),
+        };
 
         return (new Configuration\ApplicationBuilder(new static($baseDirectory)))
             ->withKernels()
             ->withEvents()
             ->withCommands();
     }
 
+    /**
+     * Infer the application's base directory from the environment.
+     *
+     * @return string
+     */
+    public static function inferBaseDirectory()
+    {
+        return match (true) {
+            isset($_ENV['APP_BASE_PATH']) => $_ENV['APP_BASE_PATH'],
+            default => dirname(array_keys(ClassLoader::getRegisteredLoaders())[0]),
+        };
+    }
+
     /**
      * Get the version number of the application.
      *

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 testBaseDirectoryWithComposer()
+    {
+        $app = Application::configure()->create();
+
+        $this->assertSame(dirname(__DIR__, 2), $app->basePath());
+    }
+}