index.js

const https = require("https");
const options = {
  hostname: "api.github.com",
  path: `/repos/${process.env.GITHUB_REPOSITORY}/actions/runs/${process.env.GITHUB_RUN_ID}/cancel`,
  headers: {
    Authorization: `token ${process.env.INPUT_TOKEN}`,
    "Content-Type": "application/json",
    "User-Agent": "actions/cancel-action",
  },
  method: "POST",
};

const req = https.request(options, (res) => {
  res.on("data", (data) => {
    if (res.statusCode != 202) {
      let parsed = JSON.parse(data);
      console.log(`Error: ${parsed.message}`);
      process.exit(1);
    } else {
      console.log("Cancelled successfully.");
      process.exit(0);
    }
  });
});

req.on("error", (error) => {
  console.log(`HTTP Error: ${error}`);
  process.exit(1);
});

req.end();

console.log(`::warning::Cancelled the workflow run from job ${process.env.GITHUB_JOB}`);