GitHub branch renamer powered by OctoKit

index.ts

import { Octokit } from '@octokit/rest';
import { renameBranch } from 'octokit-plugin-rename-branch';
import { Endpoints } from '@octokit/types';

/*
 * Here's the standard disclaimer about how this worked for me, may not work for you, 
 * and that I am not responsible in the slightest to make it work for you. There's no huge story
 * to go with this, I just decided this is something I wanted to do so I did it.
 */

const PERSONAL_TOKEN = 't0t4lly-r34l-t0k3n';
const USERNAME = 'octocat';
const REPLACEMENT_BRANCH = 'develop';

type listUserReposResponse = Endpoints['GET /repos/:owner/:repo']['response'];

const MyOctokit = Octokit.plugin(renameBranch);
const octokit = new MyOctokit({
  auth: PERSONAL_TOKEN,
});

octokit.repos
  .listForUser({
    username: USERNAME,
    type: 'owner',
  })
  .then(({ data }) => {
    data.forEach((element: listUserReposResponse['data']) => {
      if (element.default_branch === 'master' && !element.fork && !element.archived) {
        console.log(`Changing branch for ${element.name}`);
        octokit.renameBranch({
          owner: USERNAME,
          repo: element.name,
          current_name: element.default_branch,
          name: REPLACEMENT_BRANCH,
        });
      }
    });
  });