auto-restart-controller.js

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

let shouldAutoRestart;
const configFilePath = path.join(__dirname, './build/nodeConfig.json');

// Function to update shouldAutoRestart from the config file
const updateAutoRestartStatus = () => {
  try {
    const configFileContent = fs.readFileSync(configFilePath).toString();
    const config = JSON.parse(configFileContent);
    shouldAutoRestart = config.autoRestart;
  } catch (error) {
    console.error(`Error reading or parsing the config file: ${error}`);
  }
};

// Initialize shouldAutoRestart
updateAutoRestartStatus();

// Watch the config file for changes
fs.watch(configFilePath, (eventType, filename) => {
  if (eventType === 'change') {
    console.log(
      `${filename} has been updated. Updating auto-restart status...`
    );
    updateAutoRestartStatus();
  }
});

const startApp = () => {
  const app = fork(path.join(__dirname, '../validator/dist/src/index.js'), {
    cwd: path.join(__dirname, './build'),
  });

  app.on('exit', code => {
    console.log(
      `Child process exited with code ${code}. shouldAutoRestart: `,
      shouldAutoRestart
    );
    if (shouldAutoRestart && code === 0) {
      console.log('Restarting validator');
      startApp();
    } else {
      // Propagate the child process exit code to the main process
      process.exit(code);
    }
  });
};

startApp();