Make drupal-finder work with multiple autoloaders

composer.json

@@ -25,7 +25,8 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^10.4",
-        "mikey179/vfsstream": "^1.6"
+        "mikey179/vfsstream": "^1.6",
+        "symfony/process": "^6.4"
     },
     "config": {
         "platform": {

src/DrupalFinderComposerRuntime.php

@@ -8,6 +8,7 @@
 namespace DrupalFinder;
 
 use Composer\InstalledVersions;
+use Composer\Autoload\ClassLoader;
 
 class DrupalFinderComposerRuntime
 {
@@ -16,15 +17,20 @@ class DrupalFinderComposerRuntime
      */
     public function getDrupalRoot(): ?string
     {
-      $core = InstalledVersions::getInstallPath('drupal/core');
-      return $core ? realpath(dirname($core)) : null;
+        $core = InstalledVersions::getInstallPath('drupal/core');
+        return $core ? realpath(dirname($core)) : null;
     }
 
     /**
      * Get the path to the Composer root directory.
      */
     public function getComposerRoot(): ?string
     {
+        foreach (InstalledVersions::getAllRawData() as $data) {
+            if (isset($data['versions']['drupal/core'])) {
+                return realpath($data['root']['install_path']);
+            }
+        }
         $root = InstalledVersions::getRootPackage();
         return realpath($root['install_path']);
     }
@@ -34,8 +40,11 @@ public function getComposerRoot(): ?string
      */
     public function getVendorDir(): ?string
     {
-      $reflection = new \ReflectionClass(InstalledVersions::class);
-      return realpath(dirname(dirname($reflection->getFileName())));
+        foreach (ClassLoader::getRegisteredLoaders() as $vendorDir => $loader) {
+            if ($loader->findFile(\Drupal::class)) {
+                return realpath($vendorDir);
+            }
+        }
     }
 
 }

tests/.editorconfig

@@ -0,0 +1,2 @@
+[composer.json]
+indent_size = 2

tests/DrupalFinderComposerRuntimeTest.php

@@ -3,6 +3,8 @@
 namespace DrupalFinder\Tests;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Process\Exception\ProcessFailedException;
+use Symfony\Component\Process\Process;
 
 class DrupalFinderComposerRuntimeTest extends TestCase {
 
@@ -12,11 +14,33 @@ class DrupalFinderComposerRuntimeTest extends TestCase {
    * @runInSeparateProcess
    */
   public function testDefault() {
-    $basePath = realpath( __DIR__ . '/fixtures/default');
+    $basePath = realpath(__DIR__ . '/fixtures/default');
     $this->assertDirectoryExists($basePath . '/vendor', static::installFixtures);
     $this->assertDirectoryExists($basePath . '/web', static::installFixtures);
 
-    $result = json_decode(require $basePath  . '/drupal-finder.php', TRUE);
+    $result = json_decode(require $basePath . '/drupal-finder.php', TRUE);
+    $this->assertSame($result['getComposerRoot'], $basePath);
+    $this->assertSame($result['getVendorDir'], $basePath . '/vendor');
+    $this->assertSame($result['getDrupalRoot'], $basePath . '/web');
+  }
+
+  /**
+   * @runInSeparateProcess
+   */
+  public function testDefaultComposerScript() {
+    $basePath = realpath(__DIR__ . '/fixtures/default');
+    $this->assertDirectoryExists($basePath . '/vendor', static::installFixtures);
+    $this->assertDirectoryExists($basePath . '/web', static::installFixtures);
+
+    $process = new Process(['composer', 'run-script', 'dump-drupal-finder'], $basePath);
+    $process->run();
+
+    // executes after the command finishes
+    if (!$process->isSuccessful()) {
+      throw new ProcessFailedException($process);
+    }
+
+    $result = json_decode($process->getOutput(), TRUE);
     $this->assertSame($result['getComposerRoot'], $basePath);
     $this->assertSame($result['getVendorDir'], $basePath . '/vendor');
     $this->assertSame($result['getDrupalRoot'], $basePath . '/web');
@@ -26,11 +50,11 @@ public function testDefault() {
    * @runInSeparateProcess
    */
   public function testCustomVendor() {
-    $basePath = realpath( __DIR__ . '/fixtures/custom-vendor');
+    $basePath = realpath(__DIR__ . '/fixtures/custom-vendor');
     $this->assertDirectoryExists($basePath . '/foo/bar', static::installFixtures);
     $this->assertDirectoryExists($basePath . '/foo/bar/drupal', static::installFixtures);
 
-    $result = json_decode(require $basePath  . '/drupal-finder.php', TRUE);
+    $result = json_decode(require $basePath . '/drupal-finder.php', TRUE);
     $this->assertSame($result['getComposerRoot'], $basePath);
     $this->assertSame($result['getVendorDir'], $basePath . '/foo/bar');
     $this->assertSame($result['getDrupalRoot'], $basePath . '/foo/bar/drupal');

tests/fixtures/default/TestAsComposerScript.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace DrupalFinder\Tests\Fixtures\Default;
+
+use Composer\Script\Event;
+use DrupalFinder\DrupalFinderComposerRuntime;
+
+class TestAsComposerScript {
+
+  public static function dumpDrupalFinder(Event $event) {
+    $finder = new DrupalFinderComposerRuntime();
+    $event->getIO()->writeRaw(json_encode([
+      'getComposerRoot' => $finder->getComposerRoot(),
+      'getVendorDir' => $finder->getVendorDir(),
+      'getDrupalRoot' => $finder->getDrupalRoot(),
+    ]));
+  }
+
+}

tests/fixtures/default/composer.json

@@ -23,5 +23,13 @@
     }
   },
   "minimum-stability": "dev",
-  "prefer-stable": true
+  "prefer-stable": true,
+  "autoload": {
+    "classmap": [
+      "TestAsComposerScript.php"
+    ]
+  },
+  "scripts": {
+    "dump-drupal-finder": "\\DrupalFinder\\Tests\\Fixtures\\Default\\TestAsComposerScript::dumpDrupalFinder"
+  }
 }