Slack用の最低限のbotkit

index.js

// obtain from:
// Botkitで最小構成のSlack Bot https://qiita.com/nobukatsu/items/88917a2348628244bc42
// howdyai/botkit https://github.com/howdyai/botkit

const botkit = require('botkit')
const controller = botkit.slackbot({ debug: true })

controller.hears('hello', ['direct_message', 'direct_mention'], (bot, message) => {
  bot.reply(message, 'Hello yourself!')
})

controller
  .spawn({
    token: process.env.SLACK_TOKEN
  })
  .startRTM(function(err) {
    if (err) {
      throw new Error(err)
    }
  })