Allow support for non-default vendor-dir by using official Composer API

Author: JoshuaBehrens

src/mate/bin/mate.php

@@ -23,7 +23,12 @@
 foreach ($autoloadPaths as $autoloadPath) {
     if (file_exists($autoloadPath)) {
         require_once $autoloadPath;
-        $root = dirname(realpath($autoloadPath), 2);
+        if (method_exists(InstalledVersions::class, 'getInstallPath')) {
+            $root = Composer\InstalledVersions::getInstallPath('__root__');
+        } else {
+            $root = dirname(realpath($autoloadPath), 2);
+        }
+
         break;
     }
 }

src/mate/src/Discovery/ComposerExtensionDiscovery.php

@@ -11,6 +11,7 @@
 
 namespace Symfony\AI\Mate\Discovery;
 
+use Composer\InstalledVersions;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -161,64 +162,13 @@ private function getInstalledPackages(): array
             return $this->installedPackages;
         }
 
-        $installedJsonPath = $this->rootDir.'/vendor/composer/installed.json';
-        if (!file_exists($installedJsonPath)) {
-            $this->logger->warning('Composer installed.json not found', ['path' => $installedJsonPath]);
-
-            return $this->installedPackages = [];
+        if (method_exists(InstalledVersions::class, 'getAllRawData')) {
+            $packages = InstalledVersions::getAllRawData();
+        } else {
+            $packages = $this->getPackagesWithoutComposer();
         }
 
-        $content = file_get_contents($installedJsonPath);
-        if (false === $content) {
-            $this->logger->warning('Could not read installed.json', [
-                'path' => $installedJsonPath,
-                'error' => error_get_last()['message'] ?? 'Unknown error',
-            ]);
-
-            return $this->installedPackages = [];
-        }
-
-        try {
-            $data = json_decode($content, true, 512, \JSON_THROW_ON_ERROR);
-        } catch (\JsonException $e) {
-            $this->logger->error('Invalid JSON in installed.json', ['error' => $e->getMessage()]);
-
-            return $this->installedPackages = [];
-        }
-
-        if (!\is_array($data)) {
-            return $this->installedPackages = [];
-        }
-
-        // Handle both formats: {"packages": [...]} and direct array
-        $packages = $data['packages'] ?? $data;
-        if (!\is_array($packages)) {
-            return $this->installedPackages = [];
-        }
-
-        $indexed = [];
-        foreach ($packages as $package) {
-            if (!\is_array($package) || !isset($package['name']) || !\is_string($package['name'])) {
-                continue;
-            }
-
-            /** @var array{
-             *     name: string,
-             *     extra: array<string, mixed>,
-             * } $validPackage */
-            $validPackage = [
-                'name' => $package['name'],
-                'extra' => [],
-            ];
-
-            if (isset($package['extra']) && \is_array($package['extra'])) {
-                /** @var array<string, mixed> $extra */
-                $extra = $package['extra'];
-                $validPackage['extra'] = $extra;
-            }
-
-            $indexed[$package['name']] = $validPackage;
-        }
+        $indexed = $this->indexPackagesByName($packages);
 
         return $this->installedPackages = $indexed;
     }
@@ -420,4 +370,75 @@ private function extractAiMateConfigString(array $composer, string $key): ?strin
 
         return $value;
     }
+
+    private function getPackagesWithoutComposer(): array
+    {
+        $installedJsonPath = $this->rootDir.'/vendor/composer/installed.json';
+
+        if (!file_exists($installedJsonPath)) {
+            $this->logger->warning('Composer installed.json not found', ['path' => $installedJsonPath]);
+
+            return [];
+        }
+
+        $content = file_get_contents($installedJsonPath);
+        if (false === $content) {
+            $this->logger->warning('Could not read installed.json', [
+                'path' => $installedJsonPath,
+                'error' => error_get_last()['message'] ?? 'Unknown error',
+            ]);
+
+            return [];
+        }
+
+        try {
+            $data = json_decode($content, true, 512, \JSON_THROW_ON_ERROR);
+        } catch (\JsonException $e) {
+            $this->logger->error('Invalid JSON in installed.json', ['error' => $e->getMessage()]);
+
+            return [];
+        }
+
+        if (!\is_array($data)) {
+            return [];
+        }
+
+        // Handle both formats: {"packages": [...]} and direct array
+        $packages = $data['packages'] ?? $data;
+
+        if (!\is_array($packages)) {
+            return [];
+        }
+
+        return $packages;
+    }
+
+    private function indexPackagesByName(array $packages): array
+    {
+        $indexed = [];
+        foreach ($packages as $package) {
+            if (!\is_array($package) || !isset($package['name']) || !\is_string($package['name'])) {
+                continue;
+            }
+
+            /** @var array{
+             *     name: string,
+             *     extra: array<string, mixed>,
+             * } $validPackage
+             */
+            $validPackage = [
+                'name' => $package['name'],
+                'extra' => [],
+            ];
+
+            if (isset($package['extra']) && \is_array($package['extra'])) {
+                /** @var array<string, mixed> $extra */
+                $extra = $package['extra'];
+                $validPackage['extra'] = $extra;
+            }
+
+            $indexed[$package['name']] = $validPackage;
+        }
+        return $indexed;
+    }
 }