--- /dev/null
+<?php
+
+namespace Drupal\drupalmoduleupgrader\Plugin\DMU\Converter;
+
+use Drupal\Core\StringTranslation\TranslationInterface;
+use Drupal\drupalmoduleupgrader\ConverterBase;
+use Drupal\drupalmoduleupgrader\TargetInterface;
+use Pharborist\Parser;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * @Converter(
+ * id = "grep",
+ * description = @Translation("Searches for and replaces commonly-used code that has changed in Drupal 8.")
+ * )
+ */
+class Grep extends ConverterBase {
+
+ /**
+ * @var string[]
+ */
+ private $targets = [];
+
+ public function __construct(array $configuration, $plugin_id, $plugin_definition, TranslationInterface $translator, LoggerInterface $log) {
+ parent::__construct($configuration, $plugin_id, $plugin_definition, $translator, $log);
+
+ foreach ($configuration['globals'] as $variable => $replacement) {
+ $this->targets['global $' . $variable . ';'] = '$' . $variable . ' = ' . $replacement . ';';
+ $this->targets['$GLOBALS[\'' . $variable . '\']'] = $replacement;
+ $this->targets['$GLOBALS["' . $variable . '"]'] = $replacement;
+ }
+ foreach ($configuration['constants'] as $constant => $replacement) {
+ $this->targets[$constant] = $replacement;
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+ return new static(
+ $container->get('config.factory')->get('drupalmoduleupgrader.grep')->get('definitions'),
+ $plugin_id,
+ $plugin_definition,
+ $container->get('string_translation'),
+ $container->get('logger.factory')->get('drupalmoduleupgrader')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function convert(TargetInterface $target) {
+ foreach ($this->configuration['function_calls'] as $function => $replace_with) {
+ $function_calls = $target->getIndexer('function_call')->get($function);
+ foreach ($function_calls as $function_call) {
+ $rewritten = str_ireplace($function, $replace_with, $function_call->getText());
+ $node = Parser::parseExpression($rewritten);
+ $function_call->replaceWith($node);
+ $target->save($node);
+ }
+ }
+
+ // Flush other open syntax trees to ensure that other plugins don't clobber
+ // our changes later.
+ $target->flush();
+
+ foreach ($target->getFinder() as $file) {
+ // Load in the entire contents of the module. This is criminally inefficient
+ // and wasteful of memory and should eventually be refactored into something
+ // a little more...I dunno, sustainable.
+ /** @var \Symfony\Component\Finder\SplFileInfo $file */
+ $search = array_keys($this->targets);
+ $replace = array_values($this->targets);
+ file_put_contents($file->getPathname(), str_replace($search, $replace, $file->getContents()));
+ }
+ }
+
+}