[FEATURE] Provide migration for typoscript xhtmlDoctype config

Resolves: #3616

config/v12/typoscript-124.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->import(__DIR__ . '/../config.php');
+    $rectorConfig->rule(\Ssch\TYPO3Rector\Rector\v12\v4\typoscript\MigrateXhtmlDoctypeRector::class);
+};

src/Rector/v12/v4/typoscript/MigrateXhtmlDoctypeRector.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ssch\TYPO3Rector\Rector\v12\v4\typoscript;
+
+use Helmich\TypoScriptParser\Parser\AST\Operator\Assignment;
+use Helmich\TypoScriptParser\Parser\AST\Statement;
+use Ssch\TYPO3Rector\FileProcessor\TypoScript\Rector\AbstractTypoScriptRector;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+
+/**
+ * @changelog https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.4/Deprecation-100461-TypoScriptOptionConfigxhtmlDoctype.html
+ * @see \Ssch\TYPO3Rector\Tests\Rector\v12\v4\typoscript\MigrateXhtmlDoctypeRector\MigrateXhtmlDoctypeRectorTest
+ */
+final class MigrateXhtmlDoctypeRector extends AbstractTypoScriptRector
+{
+    public function enterNode(Statement $statement): void
+    {
+        if (! $statement instanceof Assignment) {
+            return;
+        }
+
+        if ($statement->object->absoluteName !== 'config.xhtmlDoctype') {
+            return;
+        }
+
+        $statement->object->relativeName = str_replace('xhtmlDoctype', 'doctype',$statement->object->relativeName);
+        $statement->object->absoluteName = str_replace('xhtmlDoctype', 'doctype',$statement->object->absoluteName);
+
+        $this->hasChanged = true;
+    }
+
+    /**
+     * @codeCoverageIgnore
+     */
+    public function getRuleDefinition(): RuleDefinition
+    {
+        return new RuleDefinition('Migrate typoscript xhtmlDoctype to doctype', [new CodeSample(
+            <<<'CODE_SAMPLE'
+config.xhtmlDoctype = 1
+CODE_SAMPLE
+            ,
+            <<<'CODE_SAMPLE'
+config.doctype = 1
+CODE_SAMPLE
+        )]);
+    }
+}

tests/Rector/v12/v4/typoscript/MigrateXhtmlDoctypeRector/Fixture/fixture.typoscript.inc

@@ -0,0 +1,11 @@
+config.xhtmlDoctype = 1
+
+config {
+    xhtmlDoctype = 1
+}
+-----
+config.doctype = 1
+
+config {
+    doctype = 1
+}

tests/Rector/v12/v4/typoscript/MigrateXhtmlDoctypeRector/MigrateXhtmlDoctypeRectorTest.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ssch\TYPO3Rector\Tests\Rector\v12\v4\typoscript\MigrateXhtmlDoctypeRector;
+
+use Iterator;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+final class MigrateXhtmlDoctypeRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(string $filePath): void
+    {
+        $this->doTestFile($filePath);
+    }
+
+    /**
+     * @return Iterator<array<string>>
+     */
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture', '*.typoscript.inc');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}

tests/Rector/v12/v4/typoscript/MigrateXhtmlDoctypeRector/config/configured_rule.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Ssch\TYPO3Rector\Rector\v12\v4\typoscript\MigrateXhtmlDoctypeRector;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->import(__DIR__ . '/../../../../../../../config/config_test.php');
+    $rectorConfig->rule(MigrateXhtmlDoctypeRector::class);
+};