Cloud Functions pubsub to slack

index.js

const IncomingWebhook = require('@slack/client').IncomingWebhook;
const url = 'Webhook URL'
const defaults = {
  username: 'webhookbot',
  iconEmoji: ':ghost:',
  channel: '#general'
}
const webhook = new IncomingWebhook(url, defaults);

exports.subscribe = function subscribe(event, callback) {
  const pubsubMessage = event.data;
  const data = JSON.parse(new Buffer(pubsubMessage.data, 'base64').toString());
  const message = {
    text: data.logName
  }
  console.log(message);

  webhook.send(message, (err, res) => {
    console.log(res);
    callback(err);
  });
};

package.json

{
  "name": "pubsub2slack",
  "version": "0.0.1",
  "dependencies": {
    "@slack/client": "3.14.2"
  }
}