Add validator spec via code generation

.phpcs.xml.dist

@@ -7,12 +7,7 @@
 		<exclude name="PSR12.Properties.ConstantVisibility.NotFound" />
 	</rule>
 
-	<!-- Include sniffs for PHP cross-version compatibility. -->
-	<config name="testVersion" value="5.6-"/>
-	<rule ref="PHPCompatibilityWP">
-		<exclude-pattern>bin/*</exclude-pattern>
-	</rule>
-
+	<arg value="p"/>
 	<arg value="s"/>
 	<arg name="extensions" value="php"/>
 
@@ -25,14 +20,23 @@
 	<arg name="basepath" value="./"/>
 
 	<!-- Check up to 20 files simultaneously. -->
-	<arg name="parallel" value="20"/>
+	<arg name="parallel" value="1"/>
 
-    <!-- Executable scripts are meant to have side-effects. -->
-    <rule ref="PSR1.Files.SideEffects">
-        <exclude-pattern>bin/*</exclude-pattern>
-    </rule>
+	<!-- Executable scripts are meant to have side-effects. -->
+	<rule ref="PSR1.Files.SideEffects">
+		<exclude-pattern>bin/*</exclude-pattern>
+	</rule>
 
+	<!-- Line length can not easily be controlled in generated code. -->
 	<rule ref="Generic.Files.LineLength.TooLong">
+		<exclude-pattern>src/Validator/ErrorCode.php</exclude-pattern>
+		<exclude-pattern>src/Validator/Spec.php</exclude-pattern>
+		<exclude-pattern>src/Validator/Spec/*</exclude-pattern>
 		<exclude-pattern>tests/*</exclude-pattern>
 	</rule>
+
+	<!-- Class names that conflict with PHP reserved keywords need to be sufixed. -->
+	<rule ref="Squiz.Classes.ValidClassName.NotCamelCaps">
+		<exclude-pattern>src/Validator/Spec/Tag/*_.php</exclude-pattern>
+	</rule>
 </ruleset>

bin/generate-validator-spec.php

@@ -0,0 +1,50 @@
+#!/usr/bin/env php
+<?php
+
+use AmpProject\Tooling\Validator\SpecGenerator;
+
+require dirname(__DIR__) . '/vendor/autoload.php';
+
+if (! class_exists('Nette\PhpGenerator\ClassType')) {
+    echo "ERROR: The optional package nette/php-generator is needed for code generation.\n";
+    echo "Install the package via the following Composer command:\n";
+    echo "composer require --dev nette/php-generator:^3.5\n";
+    exit -1;
+}
+
+$specGenerator = new SpecGenerator();
+$destination   = !empty($argv[1]) ? $argv[1] : dirname(__DIR__) . '/src/Validator';
+
+function recursivelyRemoveDirectory($directory)
+{
+    if (is_dir($directory)) {
+        $objects = scandir($directory);
+
+        foreach ($objects as $object) {
+            if ($object !== '.' && $object !== '..') {
+                $filePath = "{$directory}/{$object}";
+
+                if (is_dir($filePath) && ! is_link($filePath)) {
+                    recursivelyRemoveDirectory($filePath);
+                } else {
+                    unlink($filePath);
+                }
+            }
+        }
+
+        rmdir($directory);
+    }
+}
+
+try {
+    recursivelyRemoveDirectory($destination);
+
+    $specGenerator->generate(
+        json_decode(file_get_contents('https://cdn.ampproject.org/v0/validator.json'), true),
+        'AmpProject\Validator',
+        $destination
+    );
+} catch (Exception $exception) {
+    echo 'ERROR: ' . $exception->getMessage();
+    exit -1;
+}