script.js

// PARAMETERS
const TOKEN = ""; // GitHub Token `repo_deployments` authorized
const REPO = "your-repo"; // e.g. "my-repository"
const USER_OR_ORG = "your-name"; // e.g. "your-name"

// GLOBAL VARS
const URL = `https://api.github.com/repos/${USER_OR_ORG}/${REPO}/deployments`;
const AUTH_HEADER = `token ${TOKEN}`;

// UTILITY FUNCTIONS
const getAllDeployments = () =>
  fetch(`${URL}`, { headers: { authorization: AUTH_HEADER } }).then(val => val.json());

const makeDeploymentInactive = id =>
  fetch(`${URL}/${id}/statuses`, {
    method: "POST",
    body: JSON.stringify({ state: "inactive" }),
    headers: {
      "Content-Type": "application/json",
      Accept: "application/vnd.github.ant-man-preview+json",
      authorization: AUTH_HEADER
    }
  }).then(() => id);

const deleteDeployment = id =>
  fetch(`${URL}/${id}`, {
    method: "DELETE",
    headers: { authorization: AUTH_HEADER }
  }).then(() => id);

// MAIN
getAllDeployments()
  .catch(console.error)
  .then(res => {
    console.log(`${res.length} enviroments found`);
    return res;
  })
  .then(val => val.map(({ id }) => id))
  .then(ids => Promise.all(ids.map(id => makeDeploymentInactive(id))))
  .then(res => {
    console.log(`${res.length} enviroments marked as "inactive"`);
    return res;
  })
  .then(ids => Promise.all(ids.map(id => deleteDeployment(id))))
  .then(res => {
    console.log(`${res.length} enviroments deleted`);
    return res;
  })
  .then(finalResult => {
    const appDiv = document.getElementById("app");
    appDiv.innerHTML = `
      <h1>CLEANUP RESULT</h1>
      <br>
      Removed enviroments: ${finalResult.length}
      <br>
      <br>Ids:<br>
      ${JSON.stringify(finalResult)}
      <br><br><br><br><br><br>
        <p>(Open up the console)</p>
    `;
});