Initial Drupal 11 with DDEV setup

vendor/grasmash/yaml-cli/src/Command/LintCommand.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Grasmash\YamlCli\Command;
+
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Class CreateProjectCommand
+ *
+ * @package Grasmash\YamlCli\Command
+ */
+class LintCommand extends CommandBase
+{
+
+    /**
+     * {inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setName('lint')
+            ->setDescription('Validates that a given YAML file has valid syntax.')
+            ->addUsage("path/to/file.yml")
+            ->addArgument(
+                'filename',
+                InputArgument::REQUIRED,
+                "The filename of the YAML file"
+            );
+    }
+
+    /**
+     * @param \Symfony\Component\Console\Input\InputInterface $input
+     * @param \Symfony\Component\Console\Output\OutputInterface $output
+     *
+     * @return int 0 if everything went fine, or an exit code
+     */
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $filename = $input->getArgument('filename');
+        $yaml_parsed = $this->loadYamlFile($filename);
+        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>");
+        }
+
+        return 0;
+    }
+}