app-sync/src/gateway-api-webhook.js

import R from "ramda";
import log from "./log";


/**
 * Handles web-hook calls from Github.
 */
export default (apps, manifest) => {
  return {
    post(req, res) {
      // Extract data.
      const data = req.body;
      const branch = (data.ref && R.last(data.ref.split("/"))) || data.repository.default_branch;
      const repo = data.repository.full_name;
      const modified = (data.head_commit && data.head_commit.modified) || [];

      const isManifestMatch = R.any(path => path === manifest.repo.path, modified);
      if (isManifestMatch) {
        manifest.update()
          .catch(err => {
            log.error(`Failed while updating manifest.`);
            log.error((err));
          });
      } else {
        // Match apps that reside within the repo that Github posted.
        const isRepoMatch = (app) => app.repo.name === repo && app.branch === branch;
        const matchingApps = R.filter(isRepoMatch, apps);

        // Update any matching apps.
        if (matchingApps.length > 0) {
          log.info(`Github webhook for '${ repo }:${ branch }' => Checking for updates: ${ matchingApps.map(item => item.id) }`);
          matchingApps.forEach(app => app.update());
        }
      }

      // Finish up.
      res.status(200).send();
    }
  };
};