Add a core-convert job

Closes #3414168

scripts/src/ConverterCommand.php

@@ -4,6 +4,7 @@ declare(strict_types = 1);
 
 namespace Drupal\automatic_updates\Development;
 
+use Composer\InstalledVersions;
 use Composer\Script\Event;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
@@ -81,11 +82,12 @@ class ConverterCommand extends Command {
 
   private bool $gitlabci;
 
+  private readonly string $projectRoot;
+
   /**
    * {@inheritdoc}
    */
   protected function configure() {
-    $this->addArgument('core_dir', InputArgument::REQUIRED, 'The path to the root of Drupal Core');
     $this->addArgument('core_branch', InputArgument::OPTIONAL, 'The core merge request branch');
     $this->addArgument('contrib_branch', InputArgument::OPTIONAL, 'The contrib branch to switch to', '3.0.x');
     $this->addOption('package_manager_only', NULL, InputOption::VALUE_NONE, 'Only convert package manager');
@@ -99,7 +101,17 @@ class ConverterCommand extends Command {
    * {@inheritdoc}
    */
   protected function execute(InputInterface $input, OutputInterface $output) {
-    $this->core_dir = realpath($input->getArgument('core_dir'));
+    // Automatically detect the Drupal root; it's the directory that immediately
+    // contains Drupal core.
+    $drupal_root = InstalledVersions::getInstallPath('drupal/core');
+    $drupal_root = realpath($drupal_root);
+    $this->core_dir = dirname($drupal_root);
+
+    // We can ask Composer where the project root is; it may not be the same
+    // as the Drupal root.
+    $root_package = InstalledVersions::getRootPackage();
+    $this->projectRoot = realpath($root_package['install_path']);
+
     $this->core_branch = $input->getArgument('core_branch');
     $this->contrib_branch = $input->getArgument('contrib_branch');
     $this->package_manager_only = $input->getOption('package_manager_only');
@@ -181,12 +193,12 @@ class ConverterCommand extends Command {
       static::executeCommand("composer require $package_name:$version --no-update --working-dir={$this->core_dir}/core");
     }
     // Run composer update for just this packages.
-    static::executeCommand("composer update  " . implode(' ', array_keys($require_section)));
+    static::executeCommand("composer update --working-dir={$this->projectRoot} " . implode(' ', array_keys($require_section)));
 
     $require_dev_section = $this->getContribModuleComposerJsonSection('require-dev');
     foreach ($require_dev_section as $package_name => $version) {
       $version = $core_symfony_version_update($package_name, $version);
-      static::executeCommand("composer require --dev $package_name:$version");
+      static::executeCommand("composer require --dev --working-dir={$this->projectRoot} $package_name:$version");
     }
     $this->doConvert();
     return Command::SUCCESS;