DiagnoseExtension

conf/config.neon

@@ -2098,6 +2098,10 @@ services:
 			php8Parser: @php8Parser
 		autowired: false
 
+	phpstanDiagnoseExtension:
+		class: PHPStan\Diagnose\PHPStanDiagnoseExtension
+		autowired: false
+
 	# Error formatters
 
 	-

src/Command/AnalyseCommand.php

@@ -10,6 +10,8 @@
 use PHPStan\Command\Symfony\SymfonyOutput;
 use PHPStan\Command\Symfony\SymfonyStyle;
 use PHPStan\DependencyInjection\Container;
+use PHPStan\Diagnose\DiagnoseExtension;
+use PHPStan\Diagnose\PHPStanDiagnoseExtension;
 use PHPStan\File\CouldNotWriteFileException;
 use PHPStan\File\FileReader;
 use PHPStan\File\FileWriter;
@@ -225,14 +227,19 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 		try {
 			[$files, $onlyFiles] = $inceptionResult->getFiles();
 		} catch (PathNotFoundException $e) {
+			$this->runDiagnoseExtensions($container, $inceptionResult->getErrorOutput());
 			$inceptionResult->getErrorOutput()->writeLineFormatted(sprintf('<error>%s</error>', $e->getMessage()));
 			return 1;
 		} catch (InceptionNotSuccessfulException) {
+			$this->runDiagnoseExtensions($container, $inceptionResult->getErrorOutput());
 			return 1;
 		}
 
 		if (count($files) === 0) {
 			$bleedingEdge = (bool) $container->getParameter('featureToggles')['zeroFiles'];
+
+			$this->runDiagnoseExtensions($container, $inceptionResult->getErrorOutput());
+
 			if (!$bleedingEdge) {
 				$inceptionResult->getErrorOutput()->getStyle()->note('No files found to analyse.');
 				$inceptionResult->getErrorOutput()->getStyle()->warning('This will cause a non-zero exit code in PHPStan 2.0.');
@@ -422,6 +429,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 		}
 
 		if ($generateBaselineFile !== null) {
+			$this->runDiagnoseExtensions($container, $inceptionResult->getErrorOutput());
 			if (count($internalErrorsTuples) > 0) {
 				foreach ($internalErrorsTuples as [$internalError]) {
 					$inceptionResult->getStdOutput()->writeLineFormatted($internalError->getMessage());
@@ -459,6 +467,8 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
 			$exitCode = $errorFormatter->formatErrors($analysisResult, $inceptionResult->getStdOutput());
 
+			$this->runDiagnoseExtensions($container, $inceptionResult->getErrorOutput());
+
 			$errorOutput->writeLineFormatted('⚠️  Result is incomplete because of severe errors. ⚠️');
 			$errorOutput->writeLineFormatted('   Fix these errors first and then re-run PHPStan');
 			$errorOutput->writeLineFormatted('   to get all reported errors.');
@@ -525,6 +535,8 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 			}
 		}
 
+		$this->runDiagnoseExtensions($container, $inceptionResult->getErrorOutput());
+
 		return $inceptionResult->handleReturn(
 			$exitCode,
 			$analysisResult->getPeakMemoryUsageBytes(),
@@ -647,4 +659,22 @@ private function runFixer(InceptionResult $inceptionResult, Container $container
 		);
 	}
 
+	private function runDiagnoseExtensions(Container $container, Output $errorOutput): void
+	{
+		if (!$errorOutput->isDebug()) {
+			return;
+		}
+
+		/** @var PHPStanDiagnoseExtension $phpstanDiagnoseExtension */
+		$phpstanDiagnoseExtension = $container->getService('phpstanDiagnoseExtension');
+
+		// not using tag for this extension to make sure it's always first
+		$phpstanDiagnoseExtension->print($errorOutput);
+
+		/** @var DiagnoseExtension $extension */
+		foreach ($container->getServicesByTag(DiagnoseExtension::EXTENSION_TAG) as $extension) {
+			$extension->print($errorOutput);
+		}
+	}
+
 }

src/DependencyInjection/ConditionalTagsExtension.php

@@ -11,6 +11,7 @@
 use PHPStan\DependencyInjection\Type\LazyDynamicThrowTypeExtensionProvider;
 use PHPStan\DependencyInjection\Type\LazyParameterClosureTypeExtensionProvider;
 use PHPStan\DependencyInjection\Type\LazyParameterOutTypeExtensionProvider;
+use PHPStan\Diagnose\DiagnoseExtension;
 use PHPStan\Parser\RichParser;
 use PHPStan\PhpDoc\StubFilesExtension;
 use PHPStan\PhpDoc\TypeNodeResolverExtension;
@@ -57,6 +58,7 @@ public function getConfigSchema(): Nette\Schema\Schema
 			LazyParameterOutTypeExtensionProvider::FUNCTION_TAG => $bool,
 			LazyParameterOutTypeExtensionProvider::METHOD_TAG => $bool,
 			LazyParameterOutTypeExtensionProvider::STATIC_METHOD_TAG => $bool,
+			DiagnoseExtension::EXTENSION_TAG => $bool,
 		])->min(1));
 	}
 

src/Diagnose/DiagnoseExtension.php

@@ -0,0 +1,31 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Diagnose;
+
+use PHPStan\Command\Output;
+
+/**
+ * DiagnoseExtension can output any diagnostic information to stderr after analysis.
+ *
+ * PHPStan displays this information when running the "analyse" command with "-vvv" CLI option.
+ *
+ * To register it in the configuration file use the `phpstan.diagnoseExtension` service tag:
+ *
+ * ```
+ * services:
+ * 	-
+ *		class: App\PHPStan\MyExtension
+ *		tags:
+ *			- phpstan.diagnoseExtension
+ * ```
+ *
+ * @api
+ */
+interface DiagnoseExtension
+{
+
+	public const EXTENSION_TAG = 'phpstan.diagnoseExtension';
+
+	public function print(Output $errorOutput): void;
+
+}

src/Diagnose/PHPStanDiagnoseExtension.php

@@ -0,0 +1,28 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Diagnose;
+
+use PHPStan\Command\Output;
+use PHPStan\Internal\ComposerHelper;
+use PHPStan\Php\PhpVersion;
+use function sprintf;
+use const PHP_VERSION_ID;
+
+class PHPStanDiagnoseExtension implements DiagnoseExtension
+{
+
+	public function print(Output $errorOutput): void
+	{
+		$phpRuntimeVersion = new PhpVersion(PHP_VERSION_ID);
+		$errorOutput->writeLineFormatted(sprintf(
+			'<info>PHP runtime version:</info> %s',
+			$phpRuntimeVersion->getVersionString(),
+		));
+		$errorOutput->writeLineFormatted(sprintf(
+			'<info>PHPStan version:</info> %s',
+			ComposerHelper::getPhpStanVersion(),
+		));
+		$errorOutput->writeLineFormatted('');
+	}
+
+}