function Composer::ensureComposerVersion

Ensure that the minimum required version of Composer is running. Throw an exception if Composer is too old.

File

composer/Composer.php, line 34

Class

Composer

Provides static functions for composer script events. See also core/lib/Drupal/Composer/Composer.php, which contains similar scripts needed by projects that include drupal/core. Scripts that are only needed by drupal/drupal go here.

Namespace

Code

public static function ensureComposerVersion() {
    $composerVersion = method_exists(ComposerApp::class, 'getVersion') ? ComposerApp::getVersion() : ComposerApp::VERSION;
    if (Comparator::lessThan($composerVersion, '1.9.0')) {
        throw new \RuntimeException("Drupal core development requires Composer 1.9.0, but Composer {$composerVersion} is installed. Please run 'composer self-update'.");
    }
}