feat: dirty files check

src/Command/AnalyseCommand.php

@@ -109,6 +109,7 @@ protected function configure(): void
 				new InputOption('watch', mode: InputOption::VALUE_NONE, description: 'Launch PHPStan Pro'),
 				new InputOption('pro', mode: InputOption::VALUE_NONE, description: 'Launch PHPStan Pro'),
 				new InputOption('fail-without-result-cache', mode: InputOption::VALUE_NONE, description: 'Return non-zero exit code when result cache is not used'),
+				new InputOption('dirty', mode: InputOption::VALUE_NONE, description: 'Only analyze files that have uncommitted changes'),
 			]);
 	}
 
@@ -147,6 +148,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 		$pro = (bool) $input->getOption('watch') || (bool) $input->getOption('pro');
 		$fix = (bool) $input->getOption('fix');
 		$failWithoutResultCache = (bool) $input->getOption('fail-without-result-cache');
+		$dirty = (bool) $input->getOption('dirty');
 
 		/** @var string|false|null $generateBaselineFile */
 		$generateBaselineFile = $input->getOption('generate-baseline');
@@ -190,6 +192,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 				$tmpFile,
 				$insteadOfFile,
 				true,
+				$dirty,
 			);
 		} catch (InceptionNotSuccessfulException $e) {
 			return 1;

src/Command/ClearResultCacheCommand.php

@@ -88,6 +88,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 				null,
 				null,
 				true,
+				false,
 			);
 		} catch (InceptionNotSuccessfulException) {
 			return 1;

src/Command/CommandHelper.php

@@ -95,6 +95,7 @@ public static function begin(
 		?string $singleReflectionFile,
 		?string $singleReflectionInsteadOfFile,
 		bool $cleanupContainerCache,
+		bool $dirty,
 	): InceptionResult
 	{
 		$stdOutput = new SymfonyOutput($output, new SymfonyStyle(new ErrorsConsoleStyle($input, $output)));
@@ -239,7 +240,13 @@ public static function begin(
 			$defaultLevelUsed = true;
 		}
 
-		$paths = array_map(static fn (string $path): string => $currentWorkingDirectoryFileHelper->normalizePath($currentWorkingDirectoryFileHelper->absolutizePath($path)), $paths);
+		if ($dirty) {
+			$dirtyPathsHelper = new DirtyFilesHelper();
+			$paths = array_map(static fn (string $path): string => $currentWorkingDirectoryFileHelper
+				->normalizePath($currentWorkingDirectoryFileHelper->absolutizePath($path)), $dirtyPathsHelper->getGitDirtyFiles());
+		} else {
+			$paths = array_map(static fn (string $path): string => $currentWorkingDirectoryFileHelper->normalizePath($currentWorkingDirectoryFileHelper->absolutizePath($path)), $paths);
+		}
 
 		$analysedPathsFromConfig = [];
 		$containerFactory = new ContainerFactory($currentWorkingDirectory);

src/Command/DiagnoseCommand.php

@@ -87,6 +87,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 				null,
 				null,
 				false,
+				false,
 			);
 		} catch (InceptionNotSuccessfulException) {
 			return 1;

src/Command/DirtyFilesHelper.php

@@ -0,0 +1,43 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Command;
+
+final class DirtyFilesHelper
+{
+	private function getGitRepoRoot(): ?string
+	{
+		exec('git rev-parse --show-toplevel 2>&1', $output, $returnVar);
+		if ($returnVar !== 0) {
+			return null;
+		}
+
+		return trim($output[0]);
+	}
+
+	/**
+	 * @return string[]
+	 */
+	public function getGitDirtyFiles(): array
+	{
+		$repoPath = $this->getGitRepoRoot();
+		if ($repoPath === null) {
+			return [];
+		}
+
+		$cmd = 'cd ' . escapeshellarg($repoPath) . ' && git status --porcelain';
+
+		exec($cmd, $output, $returnVar);
+		if ($returnVar !== 0) {
+			return [];
+		}
+
+		$dirtyFiles = [];
+
+		foreach ($output as $line) {
+			$filePath = substr($line, 3);
+			$dirtyFiles[] = $filePath;
+		}
+
+		return $dirtyFiles;
+	}
+}

src/Command/DumpParametersCommand.php

@@ -89,6 +89,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 				null,
 				null,
 				false,
+				false,
 			);
 		} catch (InceptionNotSuccessfulException) {
 			return 1;

src/Command/FixerWorkerCommand.php

@@ -114,6 +114,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 				null,
 				null,
 				false,
+				false,
 			);
 		} catch (InceptionNotSuccessfulException) {
 			return 1;

src/Command/WorkerCommand.php

@@ -118,6 +118,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 				$tmpFile,
 				$insteadOfFile,
 				false,
+				false,
 			);
 		} catch (InceptionNotSuccessfulException $e) {
 			return 1;

tests/PHPStan/Command/CommandHelperTest.php

@@ -128,6 +128,7 @@ public function testBegin(
 				null,
 				null,
 				false,
+				false,
 			);
 			if ($expectException) {
 				$this->fail();
@@ -309,6 +310,7 @@ public function testResolveParameters(
 			null,
 			null,
 			false,
+			false,
 		);
 		$parameters = $result->getContainer()->getParameters();
 		foreach ($expectedParameters as $name => $expectedValue) {