watcher.js

let fs = require('fs')
let chokidar = require('chokidar')
let colors = require('colors/safe')
let isRunning = require('is-running')

// Define our watching parameters
let basePath = process.cwd()
let pidPath = basePath + '/storage/logs/swoole_http.pid'
let pid = fs.readFileSync(pidPath, 'utf8').split(',')[0];
let ready = false

let logger = (color, message, level = 'log', skipSignal = false) => {
    console[level](colors[color](message))

    if (ready && !skipSignal) {
        sendSignal()
    }
}

let sendSignal = () => {
    // if (!isRunning(pid)) {
    //     ready = false
    //     logger('red', `PID ${pid} is not alive. Close watcher process.`, 'error')
    //     process.exit()
    // }

    process.kill(Number(pid), 'SIGUSR1')
    logger('green', `Reloading process PID ${pid}...`, 'log', true)
}

// if (!isRunning(Number(pid))) {
//     logger('red', `PID ${pid} is not alive.`, 'error')
//     return
// } else {
//     logger('green', `PID ${pid} is alive, start watching process...`)
// }

// Initialize watcher.
// Define your paths here.
let watcher = chokidar.watch([
    basePath + '/app',
    basePath + '/resources',
    basePath + '/routes',
    basePath + '/graphql',
], {
    ignored: /(^|[\/\\])\../,
    persistent: true
})

// Add event listeners.
watcher
    .on('add', path => logger('yellow', `File ${path} has been added.`))
    .on('change', path => logger('yellow', `File ${path} has been changed.`))
    .on('unlink', path => logger('yellow', `File ${path} has been removed.`))
    .on('addDir', path => logger('yellow', `Directory ${path} has been added.`))
    .on('unlinkDir', path => logger('yellow', `Directory ${path} has been removed.`))
    .on('error', error => logger('red', `Watcher error: ${error}`))
    .on('ready', () => {
        logger('green', 'Initial scan is finished. Ready for watching changes...')
        ready = true
    })