SilverStripeInstaller.php

<?php

namespace Composer\Installers;

use Composer\Package\PackageInterface;
class SilverStripeInstaller extends BaseInstaller {
    
    /** @var array<string, string> */
    protected $locations = array(
        'module' => '{$name}/',
        'theme' => 'themes/{$name}/',
    );
    
    /**
     * Return the install path based on package type.
     *
     * Relies on built-in BaseInstaller behaviour with one exception: silverstripe/framework
     * must be installed to 'sapphire' and not 'framework' if the version is <3.0.0
     */
    public function getInstallPath(PackageInterface $package, string $frameworkType = '') : string {
        if ($package->getName() == 'silverstripe/framework' && preg_match('/^\\d+\\.\\d+\\.\\d+/', $package->getVersion()) && version_compare($package->getVersion(), '2.999.999') < 0) {
            return $this->templatePath($this->locations['module'], array(
                'name' => 'sapphire',
            ));
        }
        return parent::getInstallPath($package, $frameworkType);
    }

}