path: root/core/tests/Drupal/BuildTests/Command/GenerateThemeTest.php

<?php

declare(strict_types=1);

namespace Drupal\BuildTests\Command;

use Drupal\BuildTests\QuickStart\QuickStartTestBase;
use Drupal\Core\Command\GenerateTheme;
use Drupal\Core\Serialization\Yaml;
use Drupal\sqlite\Driver\Database\sqlite\Install\Tasks;
use Symfony\Component\Console\Tester\CommandTester;
use Symfony\Component\Console\Tester\Constraint\CommandIsSuccessful;
use Symfony\Component\Process\PhpExecutableFinder;
use Symfony\Component\Process\Process;

/**
 * Tests the generate-theme commands.
 *
 * @requires extension pdo_sqlite
 *
 * @group Command
 */
class GenerateThemeTest extends QuickStartTestBase {

  /**
   * The PHP executable path.
   *
   * @var string
   */
  protected $php;

  /**
   * {@inheritdoc}
   */
  protected function setUp(): void {
    $sqlite = (new \PDO('sqlite::memory:'))->query('select sqlite_version()')->fetch()[0];
    if (version_compare($sqlite, Tasks::SQLITE_MINIMUM_VERSION) < 0) {
      $this->markTestSkipped();
    }
    parent::setUp();
    $php_executable_finder = new PhpExecutableFinder();
    $this->php = $php_executable_finder->find();
    $this->copyCodebase();
    $this->executeCommand('COMPOSER_DISCARD_CHANGES=true composer install --no-dev --no-interaction');
    chdir($this->getWorkingPath());
  }

  /**
   * Generates PHP process to generate a theme from core's starterkit theme.
   *
   * @return \Symfony\Component\Process\Process
   *   The PHP process
   */
  private function generateThemeFromStarterkit($env = NULL) : Process {
    $install_command = [
      $this->php,
      'core/scripts/drupal',
      'generate-theme',
      'test_custom_theme',
      '--name="Test custom starterkit theme"',
      '--description="Custom theme generated from a starterkit theme"',
    ];
    $process = new Process($install_command, NULL, $env);
    $process->setTimeout(60);
    return $process;
  }

  /**
   * Asserts the theme exists. Returns the parsed *.info.yml file.
   *
   * @param string $theme_path_relative
   *   The core-relative path to the theme.
   *
   * @return array
   *   The parsed *.info.yml file.
   */
  private function assertThemeExists(string $theme_path_relative): array {
    $theme_path_absolute = $this->getWorkspaceDirectory() . "/$theme_path_relative";
    $theme_name = basename($theme_path_relative);
    $info_yml_filename = "$theme_name.info.yml";
    $this->assertFileExists($theme_path_absolute . '/' . $info_yml_filename);
    $info = Yaml::decode(file_get_contents($theme_path_absolute . '/' . $info_yml_filename));
    return $info;
  }

  /**
   * Tests the generate-theme command.
   */
  public function test(): void {
    // Do not rely on \Drupal::VERSION: change the version to a concrete version
    // number, to simulate using a tagged core release.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['version'] = '9.4.0';
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    $process = $this->generateThemeFromStarterkit();
    $result = $process->run();
    $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $result);

    $theme_path_relative = 'themes/test_custom_theme';
    $info = $this->assertThemeExists($theme_path_relative);
    self::assertArrayNotHasKey('hidden', $info);
    self::assertArrayHasKey('generator', $info);
    self::assertEquals('starterkit_theme:9.4.0', $info['generator']);

    // Confirm readme is rewritten.
    $readme_file = $this->getWorkspaceDirectory() . "/$theme_path_relative/README.md";
    $this->assertSame('"Test custom starterkit theme" theme, generated from starterkit_theme. Additional information on generating themes can be found in the [Starterkit documentation](https://www.drupal.org/docs/core-modules-and-themes/core-themes/starterkit-theme).', file_get_contents($readme_file));

    // Ensure that the generated theme can be installed.
    $this->installQuickStart('minimal');
    $this->formLogin($this->adminUsername, $this->adminPassword);
    $this->visit('/admin/appearance');
    $this->getMink()->assertSession()->pageTextContains('Test custom starterkit');
    $this->getMink()->assertSession()->pageTextContains('Custom theme generated from a starterkit theme');
    $this->getMink()->getSession()->getPage()->clickLink('Install "Test custom starterkit theme" theme');
    $this->getMink()->assertSession()->pageTextContains('The "Test custom starterkit theme" theme has been installed.');

    // Ensure that a new theme cannot be generated when the destination
    // directory already exists.
    $theme_path_absolute = $this->getWorkspaceDirectory() . "/$theme_path_relative";
    $this->assertFileExists($theme_path_absolute . '/test_custom_theme.theme');
    unlink($theme_path_absolute . '/test_custom_theme.theme');
    $process = $this->generateThemeFromStarterkit();
    $result = $process->run();
    $this->assertStringContainsString('Theme could not be generated because the destination directory', $process->getErrorOutput());
    $this->assertStringContainsString($theme_path_relative, $process->getErrorOutput());
    $this->assertSame(1, $result);
    $this->assertFileDoesNotExist($theme_path_absolute . '/test_custom_theme.theme');
  }

  /**
   * Tests generating a theme from another Starterkit enabled theme.
   */
  public function testGeneratingFromAnotherTheme(): void {
    // Do not rely on \Drupal::VERSION: change the version to a concrete version
    // number, to simulate using a tagged core release.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['version'] = '9.4.0';
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    $process = $this->generateThemeFromStarterkit();
    $exit_code = $process->run();
    $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $exit_code);

    file_put_contents($this->getWorkspaceDirectory() . '/themes/test_custom_theme/test_custom_theme.starterkit.yml', <<<YAML
delete: []
no_edit: []
no_rename: []
info:
  version: 1.0.0
YAML
    );

    $install_command = [
      $this->php,
      'core/scripts/drupal',
      'generate-theme',
      'generated_from_another_theme',
      '--name="Generated from another theme"',
      '--description="Custom theme generated from a theme other than starterkit_theme"',
      '--starterkit=test_custom_theme',
    ];
    $process = new Process($install_command);
    $exit_code = $process->run();
    $this->assertStringContainsString('Theme generated successfully to themes/generated_from_another_theme', trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $exit_code);

    // Confirm new .theme file.
    $dot_theme_file = $this->getWorkspaceDirectory() . '/themes/generated_from_another_theme/generated_from_another_theme.theme';
    $this->assertStringContainsString('function generated_from_another_theme_preprocess_image_widget(array &$variables): void {', file_get_contents($dot_theme_file));
  }

  /**
   * Tests the generate-theme command on a dev snapshot of Drupal core.
   */
  public function testDevSnapshot(): void {
    // Do not rely on \Drupal::VERSION: change the version to a development
    // snapshot version number, to simulate using a branch snapshot of core.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['version'] = '9.4.0-dev';
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    $process = $this->generateThemeFromStarterkit();
    $result = $process->run();
    $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $result);

    $theme_path_relative = 'themes/test_custom_theme';
    $info = $this->assertThemeExists($theme_path_relative);
    self::assertArrayNotHasKey('hidden', $info);
    self::assertArrayHasKey('generator', $info);
    self::assertMatchesRegularExpression('/^starterkit_theme\:9.4.0-dev#[0-9a-f]+$/', $info['generator']);
  }

  /**
   * Tests the generate-theme command on a theme with a release version number.
   */
  public function testContribStarterkit(): void {
    // Change the version to a concrete version number, to simulate using a
    // contrib theme as the starterkit.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['version'] = '1.20';
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    $process = $this->generateThemeFromStarterkit();
    $result = $process->run();
    $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $result);
    $info = $this->assertThemeExists('themes/test_custom_theme');
    self::assertArrayNotHasKey('hidden', $info);
    self::assertArrayHasKey('generator', $info);
    self::assertEquals('starterkit_theme:1.20', $info['generator']);
  }

  /**
   * Tests the generate-theme command on a theme with a dev version number.
   */
  public function testContribStarterkitDevSnapshot(): void {
    // Change the version to a development snapshot version number, to simulate
    // using a contrib theme as the starterkit.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['core_version_requirement'] = '*';
    $info['version'] = '7.x-dev';
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    // Avoid the core git commit from being considered the source theme's: move
    // it out of core.
    Process::fromShellCommandline('mv core/themes/starterkit_theme themes/', $this->getWorkspaceDirectory())->run();

    $process = $this->generateThemeFromStarterkit();
    $result = $process->run();
    $this->assertStringContainsString("The source theme starterkit_theme has a development version number (7.x-dev). Because it is not a git checkout, a specific commit could not be identified. This makes tracking changes in the source theme difficult. Are you sure you want to continue? (yes/no) [yes]:\n > Theme generated successfully to themes/test_custom_theme", trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $result);
    $info = $this->assertThemeExists('themes/test_custom_theme');
    self::assertArrayNotHasKey('hidden', $info);
    self::assertArrayHasKey('generator', $info);
    self::assertEquals('starterkit_theme:7.x-dev#unknown-commit', $info['generator']);
  }

  /**
   * Tests the generate-theme command on a theme with a dev version without git.
   */
  public function testContribStarterkitDevSnapshotWithGitNotInstalled(): void {
    // Change the version to a development snapshot version number, to simulate
    // using a contrib theme as the starterkit.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['core_version_requirement'] = '*';
    $info['version'] = '7.x-dev';
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    // Avoid the core git commit from being considered the source theme's: move
    // it out of core.
    Process::fromShellCommandline('mv core/themes/starterkit_theme themes/', $this->getWorkspaceDirectory())->run();

    // Confirm that 'git' is available.
    $output = [];
    exec('git --help', $output, $status);
    $this->assertEquals(0, $status);
    // Modify our $PATH so that it begins with a path that contains an
    // executable script named 'git' that always exits with 127, as if git were
    // not found. Note that we run our tests using process isolation, so we do
    // not need to restore the PATH when we are done.
    $unavailableGitPath = $this->getWorkspaceDirectory() . '/bin';
    putenv('PATH=' . $unavailableGitPath . ':' . getenv('PATH'));
    mkdir($unavailableGitPath);
    $bash = <<<SH
#!/bin/bash
exit 127

SH;
    file_put_contents($unavailableGitPath . '/git', $bash);
    chmod($unavailableGitPath . '/git', 0755);
    // Confirm that 'git' is no longer available.
    $process = new Process(['git', '--help']);
    $process->run();
    $this->assertEquals(127, $process->getExitCode(), 'Fake git used by process.');

    $process = $this->generateThemeFromStarterkit([
      'PATH' => getenv('PATH'),
      'COLUMNS' => 80,
    ]);
    $result = $process->run();
    $this->assertEquals("[ERROR] The source theme starterkit_theme has a development version number     \n         (7.x-dev). Determining a specific commit is not possible because git is\n         not installed. Either install git or use a tagged release to generate a\n         theme.", trim($process->getErrorOutput()), $process->getErrorOutput());
    $this->assertSame(1, $result);
    $this->assertFileDoesNotExist($this->getWorkspaceDirectory() . "/themes/test_custom_theme");
  }

  /**
   * Tests the generate-theme command on a theme without a version number.
   */
  public function testCustomStarterkit(): void {
    // Omit the version, to simulate using a custom theme as the starterkit.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    unset($info['version']);
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    $process = $this->generateThemeFromStarterkit();
    $result = $process->run();
    $this->assertStringContainsString("The source theme starterkit_theme does not have a version specified. This makes tracking changes in the source theme difficult. Are you sure you want to continue? (yes/no) [yes]:\n > Theme generated successfully to themes/test_custom_theme", trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $result);
    $info = $this->assertThemeExists('themes/test_custom_theme');
    self::assertArrayNotHasKey('hidden', $info);
    self::assertArrayHasKey('generator', $info);
    self::assertEquals('starterkit_theme:unknown-version', $info['generator']);
  }

  /**
   * Tests themes that do not exist return an error.
   */
  public function testThemeDoesNotExist(): void {
    $install_command = [
      $this->php,
      'core/scripts/drupal',
      'generate-theme',
      'test_custom_theme',
      '--name="Test custom starterkit theme"',
      '--description="Custom theme generated from a starterkit theme"',
      '--starterkit',
      'foobar',
    ];
    $process = new Process($install_command, NULL);
    $process->setTimeout(60);
    $result = $process->run();
    $this->assertStringContainsString('Theme source theme foobar cannot be found.', trim($process->getErrorOutput()));
    $this->assertSame(1, $result);
  }

  /**
   * Tests that only themes with `starterkit` flag can be used.
   */
  public function testStarterKitFlag(): void {
    // Explicitly not a starter theme.
    $install_command = [
      $this->php,
      'core/scripts/drupal',
      'generate-theme',
      'test_custom_theme',
      '--name="Test custom starterkit theme"',
      '--description="Custom theme generated from a starterkit theme"',
      '--starterkit',
      'stark',
    ];
    $process = new Process($install_command, NULL);
    $process->setTimeout(60);
    $result = $process->run();
    $this->assertStringContainsString('Theme source theme stark is not a valid starter kit.', trim($process->getErrorOutput()));
    $this->assertSame(1, $result);

    // Has not defined `starterkit`.
    $install_command = [
      $this->php,
      'core/scripts/drupal',
      'generate-theme',
      'test_custom_theme',
      '--name="Test custom starterkit theme"',
      '--description="Custom theme generated from a starterkit theme"',
      '--starterkit',
      'olivero',
    ];
    $process = new Process($install_command, NULL);
    $process->setTimeout(60);
    $result = $process->run();
    $this->assertStringContainsString('Theme source theme olivero is not a valid starter kit.', trim($process->getErrorOutput()));
    $this->assertSame(1, $result);
  }

  public function testDeleteDirectory(): void {
    $this->writeStarterkitConfig([
      'ignore' => [
        '/src/*',
        '/starterkit_theme.starterkit.yml',
      ],
    ]);

    $tester = $this->runCommand(
      [
        'machine-name' => 'test_custom_theme',
        '--name' => 'Test custom starterkit theme',
        '--description' => 'Custom theme generated from a starterkit theme',
      ]
    );

    $tester->assertCommandIsSuccessful($tester->getErrorOutput());
    $this->assertThemeExists('themes/test_custom_theme');
    $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
    self::assertDirectoryExists($theme_path_absolute);
    self::assertFileDoesNotExist($theme_path_absolute . '/src/StarterKit.php');
    self::assertDirectoryDoesNotExist($theme_path_absolute . '/src');
  }

  public function testNoEditMissingFilesWarning(): void {
    $this->writeStarterkitConfig([
      'no_edit' => [
        '/js/starterkit_theme.js',
      ],
    ]);

    $tester = $this->runCommand(
      [
        'machine-name' => 'test_custom_theme',
        '--name' => 'Test custom starterkit theme',
        '--description' => 'Custom theme generated from a starterkit theme',
      ]
    );

    self::assertThat($tester->getStatusCode(), self::logicalNot(new CommandIsSuccessful()), trim($tester->getDisplay()));
    self::assertEquals('[ERROR] Paths were defined `no_edit` but no files found.', trim($tester->getErrorOutput()));
    $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
    self::assertDirectoryDoesNotExist($theme_path_absolute);
  }

  public function testNoRenameMissingFilesWarning(): void {
    $this->writeStarterkitConfig([
      'no_rename' => [
        '/js/starterkit_theme.js',
      ],
    ]);

    $tester = $this->runCommand(
      [
        'machine-name' => 'test_custom_theme',
        '--name' => 'Test custom starterkit theme',
        '--description' => 'Custom theme generated from a starterkit theme',
      ]
    );

    self::assertThat($tester->getStatusCode(), self::logicalNot(new CommandIsSuccessful()), trim($tester->getDisplay()));
    self::assertEquals('[ERROR] Paths were defined `no_rename` but no files found.', trim($tester->getErrorOutput()));
    $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
    self::assertDirectoryDoesNotExist($theme_path_absolute);
  }

  public function testNoRename(): void {
    $this->writeStarterkitConfig([
      'no_rename' => [
        'js/starterkit_theme.js',
        '**/js/*.js',
        'js/**/*.js',
      ],
    ]);

    mkdir($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js');
    mkdir($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/baz');
    file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/starterkit_theme.js', '');
    file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/starterkit_theme.foo.js', '');
    file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/baz/starterkit_theme.bar.js', '');

    $tester = $this->runCommand(
      [
        'machine-name' => 'test_custom_theme',
        '--name' => 'Test custom starterkit theme',
        '--description' => 'Custom theme generated from a starterkit theme',
      ]
    );

    $tester->assertCommandIsSuccessful($tester->getErrorOutput());
    $this->assertThemeExists('themes/test_custom_theme');
    $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
    self::assertFileExists($theme_path_absolute . '/js/starterkit_theme.js');
    self::assertFileExists($theme_path_absolute . '/js/starterkit_theme.foo.js');
    self::assertFileExists($theme_path_absolute . '/js/baz/starterkit_theme.bar.js');
  }

  public function testNoEdit(): void {
    $this->writeStarterkitConfig([
      'no_edit' => [
        '*no_edit_*',
      ],
    ]);
    $fixture = <<<FIXTURE
# machine_name
starterkit_theme
# label
Starterkit theme
# machine_class_name
StarterkitTheme
# label_class_name
StarterkitTheme
FIXTURE;

    file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/edit_fixture.txt', $fixture);
    file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/no_edit_fixture.txt', $fixture);
    file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/src/StarterkitThemePreRender.php', <<<PHP
<?php

namespace Drupal\starterkit_theme;

use Drupal\Core\Security\TrustedCallbackInterface;

/**
 * Implements trusted prerender callbacks for the Starterkit theme.
 *
 * @internal
 */
class StarterkitThemePreRender implements TrustedCallbackInterface {

}
PHP);

    $tester = $this->runCommand(
      [
        'machine-name' => 'test_custom_theme',
        '--name' => 'Test custom starterkit theme',
        '--description' => 'Custom theme generated from a starterkit theme',
      ]
    );

    $tester->assertCommandIsSuccessful($tester->getErrorOutput());
    $this->assertThemeExists('themes/test_custom_theme');
    $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';

    self::assertFileExists($theme_path_absolute . '/no_edit_fixture.txt');
    self::assertEquals($fixture, file_get_contents($theme_path_absolute . '/no_edit_fixture.txt'));
    self::assertFileExists($theme_path_absolute . '/edit_fixture.txt');
    self::assertEquals(<<<EDITED
# machine_name
test_custom_theme
# label
Test custom starterkit theme
# machine_class_name
TestCustomTheme
# label_class_name
TestCustomTheme
EDITED, file_get_contents($theme_path_absolute . '/edit_fixture.txt'));

    self::assertEquals(<<<EDITED
<?php

namespace Drupal\\test_custom_theme;

use Drupal\Core\Security\TrustedCallbackInterface;

/**
 * Implements trusted prerender callbacks for the Test custom starterkit theme.
 *
 * @internal
 */
class TestCustomThemePreRender implements TrustedCallbackInterface {

}
EDITED, file_get_contents($theme_path_absolute . '/src/TestCustomThemePreRender.php'));
  }

  public function testInfoOverrides(): void {
    // Force `base theme` to be `false.
    $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['base theme'] = FALSE;
    file_put_contents($starterkit_info_yml, Yaml::encode($info));
    $this->writeStarterkitConfig([
      'info' => [
        'libraries' => [
          'core/jquery',
        ],
      ],
    ]);

    $tester = $this->runCommand(
      [
        'machine-name' => 'test_custom_theme',
        '--name' => 'Test custom starterkit theme',
        '--description' => 'Custom theme generated from a starterkit theme',
      ]
    );

    $tester->assertCommandIsSuccessful($tester->getErrorOutput());
    $info = $this->assertThemeExists('themes/test_custom_theme');
    self::assertArrayHasKey('base theme', $info);
    self::assertFalse($info['base theme']);
    self::assertArrayHasKey('libraries', $info);
    self::assertEquals(['core/jquery'], $info['libraries']);
  }

  public function testIncludeDotFiles(): void {
    file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/.gitignore', '*.map');
    $tester = $this->runCommand(
      [
        'machine-name' => 'test_custom_theme',
        '--name' => 'Test custom starterkit theme',
        '--description' => 'Custom theme generated from a starterkit theme',
      ]
    );

    $tester->assertCommandIsSuccessful($tester->getErrorOutput());
    $this->assertThemeExists('themes/test_custom_theme');

    // Verify that the .gitignore file is present in the generated theme.
    $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
    self::assertFileExists($theme_path_absolute . '/.gitignore');
  }

  private function writeStarterkitConfig(array $config): void {
    $starterkit_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.starterkit.yml';
    $starterkit_config = Yaml::decode(file_get_contents($starterkit_yml));
    $starterkit_config = array_replace_recursive($starterkit_config, $config);
    file_put_contents($starterkit_yml, Yaml::encode($starterkit_config));
  }

  private function runCommand(array $input): CommandTester {
    $tester = new CommandTester(new GenerateTheme(NULL, $this->getWorkspaceDirectory()));
    $tester->execute($input, [
      'capture_stderr_separately' => TRUE,
    ]);
    return $tester;
  }

}