renovate/lib/workers/branch/check-existing.ts

import { logger } from '../../logger';
import { RenovateConfig } from '../../config';
import { platform } from '../../platform';

/** TODO: Proper return type */
export async function prAlreadyExisted(
  config: RenovateConfig
): Promise<any | null> {
  logger.trace({ config }, 'prAlreadyExisted');
  if (config.recreateClosed) {
    logger.debug('recreateClosed is true');
    return null;
  }
  logger.debug('recreateClosed is false');
  // Return if same PR already existed
  const pr = await platform.findPr(config.branchName, config.prTitle, '!open');
  if (pr) {
    logger.debug('Found closed PR with current title');
    const prDetails = await platform.getPr(pr.number);
    // istanbul ignore if
    if (prDetails.state === 'open') {
      logger.debug('PR reopened');
      throw new Error('repository-changed');
    }
    return pr;
  }
  logger.debug('prAlreadyExisted=false');
  return null;
}