strider/dist-lib/cli/lib/resilient.js

Brilliant continuous deployment platform

'use strict';
const cluster = require('cluster');
const chokidar = require('chokidar');
const touch = require('touch');
module.exports = function (deps) {
    const flag = deps.restartFile();
    return {
        restart: function () {
            touch.sync(flag);
            console.log('touched ' + flag);
        },
        spawn: function (work, noCluster) {
            if (noCluster)
                return work();
            if (cluster.isMaster) {
                const watcher = chokidar.watch(flag);
                cluster.on('online', function (worker) {
                    console.log(worker.process.pid + ' forked');
                    watcher.removeAllListeners().on('change', function () {
                        console.log('restart flag touched');
                        worker.kill();
                    });
                });
                cluster.on('exit', function (worker, code, signal) {
                    console.log(worker.process.pid + ' died', code, signal);
                    cluster.fork();
                });
                cluster.fork();
            }
            else {
                work();
            }
        },
    };
};
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