Detect large .php baseline file in analysed paths and warn about poss…

…ible PHPStan slowdown

conf/config.neon

@@ -424,6 +424,7 @@ parametersSchema:
 	additionalConfigFiles: arrayOf(string())
 	generateBaselineFile: schema(string(), nullable())
 	analysedPaths: listOf(string())
+	allConfigFiles: listOf(string())
 	composerAutoloaderProjectPaths: listOf(string())
 	analysedPathsFromConfig: listOf(string())
 	usedLevel: string()

src/Command/AnalyseCommand.php

@@ -14,6 +14,8 @@
 use PHPStan\File\FileWriter;
 use PHPStan\File\ParentDirectoryRelativePathHelper;
 use PHPStan\File\PathNotFoundException;
+use PHPStan\File\RelativePathHelper;
+use PHPStan\Internal\BytesHelper;
 use PHPStan\ShouldNotHappenException;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
@@ -23,9 +25,11 @@
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Output\StreamOutput;
 use Throwable;
+use function array_intersect;
 use function array_map;
 use function count;
 use function dirname;
+use function filesize;
 use function fopen;
 use function get_class;
 use function implode;
@@ -225,6 +229,26 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 			return $inceptionResult->handleReturn(0, null);
 		}
 
+		$analysedConfigFiles = array_intersect($files, $container->getParameter('allConfigFiles'));
+		foreach ($analysedConfigFiles as $analysedConfigFile) {
+			$fileSize = @filesize($analysedConfigFile);
+			if ($fileSize === false) {
+				continue;
+			}
+
+			if ($fileSize <= 512 * 1024) {
+				continue;
+			}
+
+			/** @var RelativePathHelper $relativePathHelper */
+			$relativePathHelper = $container->getService('relativePathHelper');
+			$inceptionResult->getErrorOutput()->getStyle()->warning(sprintf(
+				'Configuration file %s (%s) is too big and might slow down PHPStan. Consider adding it to excludePaths.',
+				$relativePathHelper->getRelativePath($analysedConfigFile),
+				BytesHelper::bytes($fileSize),
+			));
+		}
+
 		$application = $container->getByType(AnalyseApplication::class);
 
 		$debug = $input->getOption('debug');

src/DependencyInjection/ContainerFactory.php

@@ -114,6 +114,7 @@ public function create(
 			'cliArgumentsVariablesRegistered' => ini_get('register_argc_argv') === '1',
 			'tmpDir' => $tempDirectory,
 			'additionalConfigFiles' => $additionalConfigFiles,
+			'allConfigFiles' => $allConfigFiles,
 			'composerAutoloaderProjectPaths' => $composerAutoloaderProjectPaths,
 			'generateBaselineFile' => $generateBaselineFile,
 			'usedLevel' => $usedLevel,