Add a new team to all Github repos in an organization

add-team-to-repos.js

/*
 * Adds a team to all the repos in a Github organization. This is a tedious
 * process in the UI. 
 *
 * Instructions:
 *
 * 1. Copy this file somewhere on your computer, e.g. ~/addteamrepos.js
 * 2. Fill in the uppercase variables below with the right values
 * 3. Run this file: `$ node ~/addteamrepos.js`
 */

const GITHUB_ORG = 'YOUR_GITHUB_ORG_NAME'; /* Name of the github organization the team is under and the repos are in */
const GITHUB_ACCESS_TOKEN = 'YOUR_GITHUB_ACCESS_TOKEN'; /* Create an access token here: https://github.com/settings/tokens */
const TEAM_NAME = 'GITHUB_TEAM_NAME'; /* Github team name */
const TEAM_PERMISSION = 'CHOSEN_PERMISSION'; /* 'pull' or 'push' or 'admin' */

const { exec } = require('child_process');

function execPromise(command) {
  return new Promise((resolve, reject) => {
    exec(command, (err, stdout, stderr) => {
      if (err) {
        return reject(err);
      }
      resolve([stdout, stderr]);
    });
  });
}

async function fetchReposPage(org, page) {
  const [response] = await execPromise(
    `curl -i -H "Authorization: token ${GITHUB_ACCESS_TOKEN}" https://api.github.com/orgs/${org}/repos?page=${page}`
  );
  const nextPageRe = /link\: \<.+page\=([0-9]*)\>\; rel\=\"next\"/gi;
  const nextPageMatch = nextPageRe.exec(response);
  const nextPage = nextPageMatch ? nextPageMatch[1] : null;
  const repos = JSON.parse(response.slice(response.indexOf('[')));
  return [repos, nextPage];
}

async function getTeamId(org, team) {
  const [response] = await execPromise(
    `curl -H "Authorization: token ${GITHUB_ACCESS_TOKEN}" https://api.github.com/orgs/${org}/teams/${team}`
  );
  const teamDetails = JSON.parse(response);
  if (!teamDetails.id) { return null; }
  return teamDetails.id;
}

async function fetchRepos(org) {
  let repos = [];
  let page = 1;
  while (page) {
    let [currentRepos, nextPage] =  await fetchReposPage(org, page);
    repos = [...repos, ...currentRepos];
    page = nextPage;
  }
  return repos;
}

async function addTeamToRepo(teamId, org, repo, permission) {
  const [out,err] = await execPromise(
    `curl -X PUT -H "Authorization: token ${GITHUB_ACCESS_TOKEN}" -d '{"permission":"${permission}"}' https://api.github.com/teams/${teamId}/repos/${org}/${repo}`
  );
  console.log(`...  Added team "${teamId}" to repo "${org}/${repo}" with permission "${permission}"`);
}

(async () => {
  /* Fetch all repos names for org */
  console.log(`Fetching repos from organization "${GITHUB_ORG}"`);
  const repos = await fetchRepos(GITHUB_ORG);
  const repoNames = repos.map(r => r.name);
  console.log(`... Found ${repoNames.length} repos`)
  
  console.log(`Fetching id for team "${TEAM_NAME}" in organization "${GITHUB_ORG}"`);
  const teamId = await getTeamId(GITHUB_ORG, TEAM_NAME);
  if (teamId == null) {
	console.error(`... Could not find team "${TEAM_NAME}" in organization "${GITHUB_ORG}"`);
	process.exit(1);
  }

  console.log(`... Found ID ${teamId} for team "${TEAM_NAME}"`)

  /* Add team to each repo */
  console.log(`Adding team "${TEAM_NAME}" to ${repoNames.length} repos with permission "${TEAM_PERMISSION}"`);
  for (let repo of repoNames) {
    await addTeamToRepo(teamId, GITHUB_ORG, repo, TEAM_PERMISSION);
  }
})();