Liran Tal

JSHeroes 2018

twitter.com/liran_tal

$> whoami I 

$> whoami I 

$> whoami I 

$> whoami I 

Making the Terminal

Great Again

my secret       for the terminal

our roots as developers

run deep in the terminal

This is You Today

After this Talk

Terminal Interaction

Terminal Interaction

Node.js Dashboard

src: https://github.com/FormidableLabs/nodejs-dashboard

do you top?

src: https://github.com/MrRio/vtop

seldom peek at

                        ?

package.json
src: https://github.com/paprikka/lana-cli

termophobia

termophobia

/term-o-pho-bi-a/

 

noun
noun: termophobia

extereme or irrational fear of computer terminals

first occurrence back in

1995

Let's Build Something!

CLI Building Blocks

  1. Create exec' module

  2. Parse arguments

  3. Interactivity

  4. Add spark 🌈

Development

CLI Building Blocks

1. Create exec' module

Development

{
  "name": "cli-chucknorris",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "bin": {
    "chucky": "./bin/index.js"
  },
  "dependencies": {},
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC"
}

package.json

#!/usr/bin/env node

magicGoesHere()

./bin/index.js

CLI Building Blocks

2. Parsing Arguments

Development

./myServer [-p | --port] <baseDir>
#!/usr/bin/env node

// you can parse arguments by yourself
console.log(process.argv)
const yargs = require('yargs')

const args = yargs
  .version()
  .help()
  .alias('help', 'h')
  .command('install <moduleName>')
  .option('category')
  .default('category', 'dev')
  .demandOption(['category'])
  .alias('category', 'c')
  .example('chucky --category dev')
  .epilogue('(c) 2018 the wonderful JSHeroes')
  .argv

src: https://github.com/yargs/yargs

CLI Building Blocks

3. Interactivity

Development

src: https://github.com/SBoudrias/Inquirer.js

const inquire = require('inquirer')

return inquire.prompt([
  {
    type: 'confirm',
    name: 'funny',
    message: 'was chuck norris funny?'
  }
])

CLI Building Blocks

4. Spark

Development

src: https://github.com/sindresorhus/ora

src: https://github.com/SamVerschueren/listr

const loader = require('ora')()

loader.start('loading...')
await new Promise(resolve => setTimeout(resolve, 1000))
loader.succeed('ready')


const Listr = require('listr')
const tasks = new Listr([
  {
    title: 'fetch something1',
    task: () => new Promise(resolve => setTimeout(resolve, 1000))
  }
])

return tasks.run()

CLI Building Blocks

Deployment

CLI Building Blocks

  1. Manage Configuration

  2. Node Versions Compat

Deployment

CLI Building Blocks

Deployment

  1. Manage Configuration

CLI Building Blocks

Deployment

  1. Manage Configuration

  2. Node Versions Compat

Building
Interactive UIs

are you docker'ing ?

$ docker ps -a

$ docker run mongodb

$ docker logs 5abc1098feca165

$ docker exec -it b7c61vfs64ad1s /bin/bash

Interact with a Web UI ?!

Terminal Interaction

src: https://github.com/lirantal/dockly

blessed

POWERED BY

src: https://github.com/chjj/blessed

blessed

blessed

blessed

blessed

blessed

blessed

blessed

Let's Build Something!

LicenseWatch

const LicenseWatch = require('licensewatch')

Blessed

const blessed = require('blessed')
const blessedContrib = require('blessed-contrib')

A Blessed Screen

const screen = blessed.screen()

Vertical Bars

var bar = blessedContrib.bar({
  // set widget label
  label: 'Licenses in Dependencies',

  // center the widget on the screen
  top: 'center',
  left: 0,

  // define vertical bar's layout
  barWidth: 4,
  barSpacing: 15,

  // sets maximum value for bar height otherwise
  // it defaults to 1
  maxHeight: 100
})

Fetch Licenses List

const licenses = new LicenseWatch(
  process.cwd() + '/node_modules/**/package.json'
)

licenses.fetch()

Update Licenses Bar

licenses.on('licensesSummary', (licenses) => {

  const titles = Object.keys(licenses)
  const values = Object.values(licenses)

  screen.append(bar)
  bar.setData({
    titles: titles,
    data: values
  })

  screen.render()
})

Our Licenses CLI Tool

blessed-react

POWERED BY blessed

src: https://github.com/Yomguithereal/react-blessed
import React from 'react';
import blessed from 'blessed';
import { render } from 'react-blessed';

// Creating our screen
const screen = blessed.screen()

// Rendering the React app using our screen
const component = render(<App />, screen);

blessed-contrib

POWERED BY blessed

src: https://github.com/yaronn/blessed-contrib

blessed-vuejs

POWERED BY blessed

src: https://github.com/lyonlai/blessed-vue

termophobia

cool just like
react hipsters?

CLI  p0rn?

src: https://github.com/yaronn/blessed-contrib
https://github.com/chjj/blessed

https://github.com/yaronn/blessed-contrib

https://github.com/Yomguithereal/react-blessed

https://github.com/sindresorhus/awesome-nodejs#command-line-utilities

https://github.com/k4m4/terminals-are-sexy

CLI  p0rn?

> echo "\u001b[0m Thank you!"

> logout

connection to 4.69.249.16 closed.

Liran Tal

 

@liran_tal     github.com/lirantal

Making The Terminal Great Again

By Liran Tal

Making The Terminal Great Again

Whether it’s npm, webpack or yeoman generators, developers spend a great deal of their time on the CLI to run, debug and interact with programs. You already know React, and use it to render to the browser or to mobile apps. Now you can harness this knowledge of React and Node.js to build your next shiny terminal UI application. This is your chance to learn the great world of Node.js CLI applications and dive into hands-on coding of a fancy React console app. You will also discover some powerful and fun CLI tools and libraries that make up the ecosystem and can help you with your day to day developer activity.

  • 543

More from Liran Tal