Add option to check directories

composer.json

@@ -7,6 +7,7 @@
         "symfony/yaml":                   "^4 | ^5",
         "symfony/console":                "^4 | ^5",
         "symfony/filesystem":             "^4 | ^5",
+        "symfony/finder":                 "^4 | ^5",
         "dflydev/dot-access-data":        "^1.1.0"
     },
     "license": "MIT",

src/Command/LintCommand.php

@@ -6,6 +6,7 @@
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Finder\Finder;
 use Symfony\Component\Yaml\Yaml;
 
 /**
@@ -23,11 +24,11 @@ protected function configure()
         $this
             ->setName('lint')
             ->setDescription('Validates that a given YAML file has valid syntax.')
-            ->addUsage("path/to/file.yml")
+            ->addUsage('path/to/file.yml')
             ->addArgument(
-                'filename',
+                'path',
                 InputArgument::REQUIRED,
-                "The filename of the YAML file"
+                'The path or directory of the YAML file'
             );
     }
 
@@ -39,15 +40,37 @@ protected function configure()
      */
     protected function execute(InputInterface $input, OutputInterface $output)
     {
-        $filename = $input->getArgument('filename');
-        $yaml_parsed = $this->loadYamlFile($filename);
+        $path = $input->getArgument('path');
+        $yaml_parsed = $this->loadYamlFile($path);
         if (!$yaml_parsed) {
             // Exit with a status of 1.
             return 1;
         }
 
+        if (is_dir($path)) {
+            $finder = new Finder();
+            $finder->files()->in($path);
+            foreach ($finder as $file) {
+                $yaml_parsed = $this->loadYamlFile($file->getRealPath());
+                if (!$yaml_parsed) {
+                    // Exit with a status of 1.
+                    return 1;
+                }
+            }
+        } else {
+            $yaml_parsed = $this->loadYamlFile($path);
+            if (!$yaml_parsed) {
+                // Exit with a status of 1.
+                return 1;
+            }
+        }
+
         if (OutputInterface::VERBOSITY_VERBOSE === $output->getVerbosity()) {
-            $output->writeln("<info>The file $filename contains valid YAML.</info>");
+            if (is_dir($path)) {
+                $output->writeln("<info>The directory $path contains valid YAML.</info>");
+            } else {
+                $output->writeln("<info>The file $path contains valid YAML.</info>");
+            }
         }
 
         return 0;

tests/phpunit/LintCommandTest.php

@@ -24,7 +24,7 @@ public function testLint($file, $expected_output, $expected_exit_code)
         $commandTester = new CommandTester($command);
         $commandTester->execute(array(
             'command'  => $command->getName(),
-            'filename' => $file
+            'path' => $file
         ), ['verbosity' => Output::VERBOSITY_VERBOSE]);
 
         $output = $commandTester->getDisplay();