Retry failed Cloud Function deployments

deployCloudFunctions.js

const { spawn } = require('child_process');
const fs = require('fs');
const path = require('path');

(async () => {
  const content = await fs.readFileSync(path.join(__dirname, '../index.js'), { encoding: 'UTF-8' });
  const REGEX = /exports.(\w+) = require/gm;

  const fnNames = content.split('\n').reduce((acc, line) => {
    const match = REGEX.exec(line);

    if (match) {
      acc.push(`functions:${match[1]}`);
    }

    return acc;
  }, []);

  let failedDeployCommand = '';

  const deploy = (fns) => {
    failedDeployCommand = '';
    const firebaseCommand = spawn('firebase', ['deploy', '--token', process.env.FIREBASE_CLI_TOKEN, '--only', fns]);

    firebaseCommand.stdout.on('data', (data) => {
      if (data.includes('firebase deploy --only')) {
        failedDeployCommand = data.toString();
      }

      console.log(data.toString());
    });

    firebaseCommand.stderr.on('data', (data) => {
      console.log(data.toString());
    });

    firebaseCommand.on('close', () => {
      if (failedDeployCommand) {
        console.log('FailedDeployCommand :>> ', failedDeployCommand);
        const regex = /functions:(\w+)/gm;
        const failedFunctions = failedDeployCommand.match(regex);
        console.log('Retrying deployment for: ', failedFunctions.join(','));

        deploy(failedFunctions.join(','));
      } else {
        console.log('There are no failed functions');
      }
    });

    firebaseCommand.on('error', (err) => {
      console.log('Cloud Function deployment failed.', err.toString());

      process.exit(1);
    });
  };

  deploy(fnNames.join(','));
})();