mqp.js

const chalk = require('chalk');
const fs = require('fs');
const daemon = require('daemon');
const path = require('path');
const update = require('./update');
const tail = require('file-tail');
const updateNotifier = require('update-notifier');
const pkg = require('./package.json');

const notifier = updateNotifier({
  pkg,
  updateCheckInterval: 0,
});
if (notifier.update) {
  console.log(`Update available ${chalk.dim(notifier.update.current)}${chalk.reset(' → ')}${chalk.green(notifier.update.latest)}`);
}

function getRunningPid(callback) {
  fs.readFile(`${__dirname}/pidfile`, {
    encoding: 'utf-8',
  }, (err, pid) => {
    if (err) {
      return callback(err);
    }

    try {
      process.kill(parseInt(pid, 10), 0);
      callback(null, parseInt(pid, 10));
    } catch (e) {
      callback(e);
    }
  });
}

switch (process.argv[2]) {
  case 'start':
    getRunningPid((err, pid) => {
      if (!err) {
        console.log('Musiqpad is already running!');
      } else {
        console.log('\nStarting musiqpad');
        console.log(`  "${chalk.yellow.bold('npm stop')}" to stop the musiqpad server`);
        console.log(`  "${chalk.yellow.bold('npm run log')}" to view server output`);
        console.log(`  "${chalk.yellow.bold('npm restart')}" to restart musiqpad`);

        // Spawn a new musiqpad daemon process, might need some more settings but I'm waiting for the new config storage for that.
        daemon.daemon(`${__dirname}/start.js`, '--daemon', {
          stdout: fs.openSync(path.join(process.cwd(), 'log.txt'), 'a'),
          stderr: fs.openSync(path.join(process.cwd(), 'log.txt'), 'a'),
        });
      }
    });

    break;
  case 'stop':
    getRunningPid((err, pid) => {
      if (!err) {
        process.kill(pid, 'SIGTERM');
        console.log('Stopping musiqpad!');
      } else {
        console.log('Musiqpad is already stopped.');
      }
    });

    break;
  case 'restart':
    getRunningPid((err, pid) => {
      if (!err) {
        process.kill(pid, 'SIGTERM');
        console.log('\nRestarting musiqpad');
        daemon.daemon(`${__dirname}/start.js`, '--daemon', {
          stdout: fs.openSync(path.join(process.cwd(), 'log.txt'), 'a'),
          stderr: fs.openSync(path.join(process.cwd(), 'log.txt'), 'a'),
        });
      } else {
        console.log('musiqpad could not be restarted, as a running instance could not be found.');
      }
    });

    break;
  case 'log': {
    console.log('Type Ctrl-C to exit');
    const ft = tail.startTailing('./log.txt');
    ft.on('line', line => {
      console.log(line);
    });
    break;
  }
  case 'update':
    getRunningPid((err, pid) => {
      if (!err) {
        process.kill(pid, 'SIGTERM');
        console.log('Stopping musiqpad!');
      }

      update();
    });

    break;
  default:
    console.log('Welcome to musiqpad!');
    console.log('Usage: npm run {start|stop|restart|log|update}');
    // TODO: Add infos for each cmd
    break;
}