aeryn.ts

// For the inspiration for this file, see: https://github.com/danger/peril-settings/blob/fc0015452438c8a1624c0951a600f723f2e60fea/org/aeryn.ts#L18-L39
import { schedule, danger, markdown } from "danger";

// Hey there!
//
// When a PR is closed, this file gets run. The purpose of this file is to
// replicate Aeryn (https://github.com/Moya/Aeryn), which invites new
// contributors to join the organization after their first PR gets merged.
//
// Ignore the next four const lines.
// The inspiration for this is https://github.com/artsy/artsy-danger/blob/f019ee1a3abffabad65014afabe07cb9a12274e7/org/all-prs.ts
const isJest = typeof jest !== "undefined";
// Returns the promise itself, for testing.
const _test = (reason: string, promise: Promise<any>) => promise;
// Schedules the promise for execution via Danger.
const _run = (reason: string, promise: Promise<any>) => schedule(promise);
const wrap: any = isJest ? _test : _run;

export const aeryn = wrap(
  "When a PR is merged, check if the author is in the org",
  async () => {
    const pr = danger.github.pr;
    const username = pr.user.login;
    const api = danger.github.api;

    if (!pr.merged) {
      // Only proceed if the PR was merged (as opposed to closed without merging).
      return;
    }

    if (pr.user.type !== "User") {
      // Ignore PRs from bots.
      return
    }

    const org = "Moya";
    const inviteMarkdown = `
  @${username} Thanks a lot for contributing to Moya! We've invited you to join 
  the Moya GitHub organization – no pressure to accept! If you'd like more 
  information on what that means, check out our [contributor guidelines][c] and
  feel free to reach out to @Moya/core-team with any questions.

  [c]: https://github.com/Moya/Moya/blob/master/Contributing.md
  `;

    try {
      // This throws if the user isn't a member of the org yet. If it doesn't
      // throw, then it means the user was already invited or has already
      // accepted the invitation (we ignore the return value here).
      await api.orgs.checkMembership({ org, username });
    } catch (error) {
      // Search to check if user has had a PR merged before
      const query = `org:moya+author:${username}+type:pr+is:merged`;
      await api.search.issues({ q: query }).then(async res => {
        const mergedPrCount = res.data.total_count;
        if (mergedPrCount === 1) {
          markdown(inviteMarkdown);
          await api.orgs.addOrUpdateMembership({ org, username, role: "member" });
        }
      });
    }
  }
);