Add Drush command for configuring PHPStan

Author: mglaman

composer.json

@@ -20,7 +20,7 @@
         "behat/mink": "^1.8",
         "composer/installers": "^1.9",
         "drupal/core-recommended": "^8.8@alpha || ^9.0",
-        "drush/drush": "^9.6 || ^10.0",
+        "drush/drush": "^9.6 || ^10.0 || ^11.0",
         "phpstan/extension-installer": "^1.1",
         "phpstan/phpstan-deprecation-rules": "^1.0",
         "phpstan/phpstan-strict-rules": "^1.0",

src/Drush/Commands/PhpstanDrupalDrushCommands.php

@@ -0,0 +1,58 @@
+<?php declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Drush\Commands;
+
+use Drush\Commands\DrushCommands;
+
+final class PhpstanDrupalDrushCommands extends DrushCommands
+{
+
+    /**
+     * @command phpstan-drupal:setup
+     * @option file
+     * @bootstrap full
+     */
+    public function setup($options = ['file' => null]): void
+    {
+        $parameters = [
+            'level' => 2,
+            'paths' => [
+                // @todo use drupal-finder for docroot
+                'web/modules/custom',
+                'web/themes/custom',
+                'web/profiles/custom',
+            ],
+            // @todo can we have this override _everything_ phpstan-drupal provides? or is it a merge.
+            'entityMapping' => [
+            ],
+        ];
+
+        $entity_type_manager = \Drupal::entityTypeManager();
+        foreach ($entity_type_manager->getDefinitions() as $definition) {
+            $parameters['entityMapping'][$definition->id()] = [
+                'class' => $definition->getClass(),
+                'storage' => $definition->getStorageClass(),
+            ];
+        }
+
+        // @todo this is just silly, reinventing NEON encoder so it's not a Drupal dependency.
+        $output = <<<NEON
+parameters:
+
+NEON;
+;
+        foreach ($parameters as $key => $value) {
+            $output .= "$key:";
+            if (is_array($value)) {
+                $output .= "\n\t";
+            }
+        }
+
+        if ($options['file'] !== null) {
+            file_put_contents($options['file'], $output);
+        } else {
+            $this->io()->writeln($output);
+        }
+    }
+
+}