Skip virtual packages

src/Cleanup.php

@@ -154,7 +154,11 @@ public function cleanupInstalledJson(): void
             if (!isset($package['autoload'])) {
                 continue;
             }
-            $packageDir = $this->workingDir . $this->vendorDirectory . ltrim($package['install-path'], '.');
+            $packageDir = $this->workingDir . $this->vendorDirectory . ltrim($package['install-path'], '.' . DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
+            if (!is_dir($packageDir)) {
+                // pcre, xdebug-handler.
+                continue;
+            }
             $autoload_key = $package['autoload'];
             foreach ($autoload_key as $type => $autoload) {
                 switch ($type) {

tests/Issues/StraussIssue101Test.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * Was over-eagerly deleteing autoload keys.
+ *
+ * @see https://github.com/BrianHenryIE/strauss/issues/101#issuecomment-2078702245
+ */
+
+namespace BrianHenryIE\Strauss\Tests\Issues;
+
+use BrianHenryIE\Strauss\Tests\Integration\Util\IntegrationTestCase;
+
+/**
+ * @package BrianHenryIE\Strauss\Tests\Issues
+ * @coversNothing
+ */
+class StraussIssue101Test extends IntegrationTestCase
+{
+    public function test_does_not_delete_autoload_keys()
+    {
+        $composerJsonString = <<<'EOD'
+{
+    "require-dev": {
+        "phpmd/phpmd": "2.15.0"
+    },
+    "scripts": {
+        "phpmd": "./vendor/bin/phpmd src/ text phpmd-ruleset.xml"
+    },
+    "extra": {
+        "strauss": {
+            "namespace_prefix": "Ademti\\Test\\Dependencies",
+            "classmap_prefix": "Ademti_Test_Dependencies",
+            "constant_prefix": "A_T_D_",
+            "delete_vendor_packages": true,
+            "delete_vendor_files": true
+        }
+    }
+}
+EOD;
+
+        chdir($this->testsWorkingDir);
+
+        file_put_contents($this->testsWorkingDir . '/composer.json', $composerJsonString);
+
+        exec('composer install');
+
+        $result = $this->runStrauss();
+
+        exec('composer dump-autoload', $output, $result_code);
+        self::assertEquals(0, $result_code);
+
+        $installed_json_string = file_get_contents($this->testsWorkingDir . '/vendor/composer/installed.json');
+        $installed_json = json_decode($installed_json_string, true);
+
+        $autoload = array();
+        foreach ($installed_json['packages'] as $package) {
+            if ($package['name'] === 'phpmd/phpmd') {
+                $autoload = $package['autoload'];
+                break;
+            }
+        }
+
+        self::assertArrayHasKey('psr-0', $autoload);
+    }
+}