From 9c3d1b0bc67706649a9a435612ca473ff1b0a303 Mon Sep 17 00:00:00 2001
From: Jan Nedbal <janedbal@gmail.com>
Date: Thu, 14 Mar 2024 10:40:04 +0100
Subject: [PATCH] Use only vendor of given composer.json

---
 bin/composer-dependency-analyser | 42 +++++++++++++++++---------------
 src/ComposerJson.php             |  8 ++++++
 2 files changed, 31 insertions(+), 19 deletions(-)

diff --git a/bin/composer-dependency-analyser b/bin/composer-dependency-analyser
index 42c9793..309af29 100755
--- a/bin/composer-dependency-analyser
+++ b/bin/composer-dependency-analyser
@@ -39,15 +39,11 @@ Ignore options:
 
 EOD;
 
-$autoloadFiles = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
-];
-
-foreach ($autoloadFiles as $autoloadFile) {
-    if (file_exists($autoloadFile)) {
-        require_once $autoloadFile;
-        break;
+// preload own classes (do not rely on presence in composer's autoloader)
+foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator(__DIR__ . '/../src')) as $entry) {
+    /** @var DirectoryIterator $entry */
+    if ($entry->isFile() && $entry->getExtension() === 'php') {
+        require_once $entry->getPathname();
     }
 }
 
@@ -82,6 +78,24 @@ if (isset($providedOptions['help'])) {
     exit;
 }
 
+$composerJsonPath = isset($providedOptions['composer-json'])
+    ? ($cwd . "/" . $providedOptions['composer-json'])
+    : ($cwd . "/composer.json");
+
+try {
+    $composerJson = new ComposerJson($composerJsonPath);
+} catch (OurRuntimeException $e) {
+    $exit($e->getMessage());
+}
+
+// load vendor that belongs to given composer.json
+$autoloadFile = dirname($composerJsonPath) . '/' . $composerJson->vendorDir . '/autoload.php';
+if (is_file($autoloadFile)) {
+    require_once $autoloadFile;
+} else {
+    $exit("Cannot find composer's autoload file, expected at '$autoloadFile'");
+}
+
 if (isset($providedOptions['config'])) {
     $configPath = $cwd . "/" . $providedOptions['config'];
 
@@ -130,16 +144,6 @@ if ($ignoreProdOnlyInDev) {
     $config->ignoreErrors([ErrorType::PROD_DEPENDENCY_ONLY_IN_DEV]);
 }
 
-$composerJsonPath = isset($providedOptions['composer-json'])
-    ? ($cwd . "/" . $providedOptions['composer-json'])
-    : ($cwd . "/composer.json");
-
-try {
-    $composerJson = new ComposerJson($composerJsonPath);
-} catch (OurRuntimeException $e) {
-    $exit($e->getMessage());
-}
-
 $loaders = ClassLoader::getRegisteredLoaders();
 if (count($loaders) > 1) {
     $printer->printLine("\nDetected multiple class loaders:");
diff --git a/src/ComposerJson.php b/src/ComposerJson.php
index d808f73..fc6406e 100644
--- a/src/ComposerJson.php
+++ b/src/ComposerJson.php
@@ -26,6 +26,12 @@
 class ComposerJson
 {
 
+    /**
+     * @readonly
+     * @var string
+     */
+    public $vendorDir;
+
     /**
      * Package => isDev
      *
@@ -51,6 +57,7 @@ public function __construct(string $composerJsonPath)
         $basePath = dirname($composerJsonPath);
 
         $composerJsonData = $this->parseComposerJson($composerJsonPath);
+        $this->vendorDir = $composerJsonData['vendor-dir'] ?? 'vendor';
 
         $requiredPackages = $composerJsonData['require'] ?? [];
         $requiredDevPackages = $composerJsonData['require-dev'] ?? [];
@@ -140,6 +147,7 @@ private function realpath(string $path): string
      * @return array{
      *     require?: array<string, string>,
      *     require-dev?: array<string, string>,
+     *     vendor-dir?: string,
      *     autoload?: array{
      *          psr-0?: array<string, string|string[]>,
      *          psr-4?: array<string, string|string[]>,