hubot-slack 4系でAttachmentsを投稿する

3系では、 robot.emit 'slack.attachment' で投稿できたが、4系では投稿できなくなった。

なので、少しやってみた。

slack = require 'hubot-slack'

module.exports = (robot) ->
  robot.respond /test/, (res) ->
    room = res.envelope.room
    timestamp = new Date/1000|0

    # https://api.slack.com/docs/message-attachments
    attachments = [
      {
        fallback: 'デプロイしたよ',
        color: 'good',
        pretext: 'デプロイしたよ',
        fields: [
          {
            title: 'Command',
            value: 'cap staging deploy',
            short: false
          }
          {
            title: 'Stage',
            value: 'staging',
            short: true
          },
          {
            title: 'Status',
            value: '0',
            short: true
          },
          {
            title: 'Output',
            value: '12323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323123231232312323',
            short: false
          }
        ],
        footer: 'hubot',
        footer_icon: 'https://hubot.github.com/assets/images/layout/[e-mail]',
        ts: timestamp
      }
    ]

    options = { as_user: true, link_names: 1, attachments: attachments }

    client = robot.adapter.client
    client.web.chat.postMessage(room, '', options)

要は、 hubot-slack が使っている [slack] (https://github.com/slackhq/node-slack-sdk) を直接呼んでしまえばできた。