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assertisinstalled.js 534 B

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  1. /**
  2. * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md.
  4. */
  5. /* eslint-env node */
  6. 'use strict';
  7. module.exports = function assertIsInstalled( packageName ) {
  8. try {
  9. require( packageName + '/package.json' );
  10. } catch ( err ) {
  11. console.error( `Error: Cannot find package '${ packageName }'.\n` );
  12. console.error( 'You need to install optional dependencies.' );
  13. console.error( 'Run: \'npm run install-optional-dependencies\'.' );
  14. process.exit( 1 );
  15. }
  16. };