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# How to generate a configuration file
To start quickly you can run the init command
```bash
vendor/bin/rector init
```
This will create a `rector.php` if it doesn't already exist in your root directory with some sensitive defaults to start with.
```php
// rector.php
use Rector\Core\Configuration\Option;
use Rector\Php74\Rector\Property\TypedPropertyRector;
use Rector\Set\ValueObject\SetList;
use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
return static function (ContainerConfigurator $containerConfigurator): void {
// here we can define, what sets of rules will be applied
$containerConfigurator->import(SetList::CODE_QUALITY);
// register single rule
$services = $containerConfigurator->services();
$services->set(TypedPropertyRector::class);
};
```
The init command takes an option called `--template-type`.
If some other Rector extension like [rector-nette](https://github.com/rectorphp/rector-nette) or [typo3-rector](https://github.com/sabbelasichon/typo3-rector) provides such a custom template type you can specify it here:
```bash
vendor/bin/rector init --template-type=typo3
```
The rector.php file for TYPO3 contains useful framework specific defaults to start from:
```php
use Ssch\TYPO3Rector\Set\Typo3SetList;
use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
use Rector\PostRector\Rector\NameImportingPostRector;
use Rector\Core\Configuration\Option;
return static function (ContainerConfigurator $containerConfigurator): void {
$containerConfigurator->import(Typo3SetList::TYPO3_76);
$containerConfigurator->import(Typo3SetList::TYPO3_87);
$containerConfigurator->import(Typo3SetList::TYPO3_95);
$containerConfigurator->import(Typo3SetList::TYPO3_104);
$containerConfigurator->import(Typo3SetList::TYPO3_11);
// get parameters
$parameters = $containerConfigurator->parameters();
$parameters->set(Option::SKIP, [
NameImportingPostRector::class => [
'ClassAliasMap.php',
'ext_localconf.php',
'ext_emconf.php',
'ext_tables.php',
__DIR__ . '/**/Configuration/TCA/*',
__DIR__ . '/**/Configuration/RequestMiddlewares.php',
__DIR__ . '/**/Configuration/Commands.php',
__DIR__ . '/**/Configuration/AjaxRoutes.php',
__DIR__ . '/**/Configuration/Extbase/Persistence/Classes.php',
],
]);
};
```
If you just want to use the default template provided by Rector you can omit the --template-type option.
# How to add a template type as a developer
In order to provide a new template type as a developer you should create a custom template class implementing the TemplateResolverInterface:
```php
use Rector\Core\Contract\Template\TemplateResolverInterface;
final class MyCustomTemplate implements TemplateResolverInterface
{
/**
* @var string
*/
private const TYPE = 'custom';
public function provide(): string
{
return __DIR__ . '/path/to/custom/template.php.dist';
}
public function supports(string $type): bool
{
return $type === self::TYPE;
}
public function __toString(): string
{
return self::TYPE;
}
}
```
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