Function isCircleciPushBranch

build-system/common/ci.js:57–59

* Used to filter CircleCI PR branches created directly on the amphtml repo * (e.g.) PRs created from the GitHub web UI. Must match `push_builds_only` * in .circleci/config.yml. * @param {string} branchName * @return {boolean}

(branchName)

 * @return {boolean}
 */
function isCircleciPushBranch(branchName) {
  return branchName == 'main' || /^amp-release-.*$/.test(branchName);
}

/**
 * Returns true if this is a PR build.