actions-playground/gen-service-version.js

const child_process = require("child_process");

const services = ["bar-service", "foo-service"];

function latestCommitInDirectory(dirname) {
  return String(
    child_process.execSync(`git log --pretty=format:%H -n 1 -- ${dirname}`)
  );
}

const serviceVersions = {};

const currentCommit = latestCommitInDirectory(".");

for (const service of services) {
  serviceVersions[service] = latestCommitInDirectory(service);
}

console.log(currentCommit);
console.log(serviceVersions);

Object.entries(serviceVersions).forEach(([name, version]) => {
  const skip = version === currentCommit ? "run" : "skip";

  console.log(`::set-output name=${name}::${skip}`);
});