JavaScript code to post Slack Notifications for GoCD Build Status

Makefile

slack_passed:
	BUILD_STATUS=passed node -pe "require('./slack')"
	
slack_failed:
	BUILD_STATUS=failed node -pe "require('./slack')"

slack.js

const https = require('https');
const url = require('url');

function getSlackPayload() {

  let pipelineLink = '<https://' + process.env.GO_SERVER_URL + '/go/tab/pipeline/history/' +
        process.env.GO_PIPELINE_NAME + '|' +
        process.env.GO_PIPELINE_NAME + '>';

  let stageLink = '<https://' + process.env.GO_SERVER_URL + '/go/pipelines/' +
        process.env.GO_PIPELINE_NAME + '/' +
        process.env.GO_PIPELINE_COUNTER + '/' +
        process.env.GO_STAGE_NAME + '/' +
        process.env.GO_STAGE_COUNTER + '|' +
        process.env.GO_STAGE_NAME + '>';

  let buildPassed = (process.env.BUILD_STATUS === 'passed');

  let iconEmoji = (buildPassed ? ':thumbsup:' : ':thumbsdown:');

  let textMessage = [
    process.env.GO_PIPELINE_NAME,
    process.env.GO_PIPELINE_LABEL,
    process.env.GO_STAGE_NAME,
    process.env.GO_STAGE_COUNTER,
    (buildPassed ? 'passed' : 'failed')
  ].join(' / ');

  let notifyFields = [
    { title: 'Pipeline', value: pipelineLink, short: true },
    { title: 'Stage', value: stageLink, short: true },
    { title: 'Label', value: process.env.GO_PIPELINE_LABEL, short: true},
    { title: 'Commit', value: process.env.GO_REVISION, short: true },
    { title: 'Triggered by', value: process.env.GO_TRIGGER_USER, short: true}
  ];

  return {
    channel: process.env.SLACK_CHANNEL || '#eng-gocd-notify',
    text: textMessage,
    color: (buildPassed ? 'good' : 'danger'),
    username: 'GoCD Build Bot',
    icon_emoji: iconEmoji,
    attachments: [
      {
        fallback: process.env.FALLBACK || '',
        fields: notifyFields
      }
    ]
  };

}

function makeRequest(postData) {
  let slackUrl = url.parse(process.env.SLACK_URL);

  let options = {
    headers: {
      'Content-Type': 'application/json',
      'Content-Length': Buffer.byteLength(postData),
      'Accept': 'application/json'
    },
    method: 'POST',
    hostname: slackUrl.host,
    path: slackUrl.path
  };

  let req = https.request(options, (res) => {
    // console.log('statusCode: ', res.statusCode);
    // console.log('headers: ', res.headers);

    res.setEncoding('utf8');

    var body = '';
    res.on('data', (chunk) => {
      body += chunk;
    });

    res.on('end', () => {
      // console.log('Processed HTTPS response from Slack');

      if (res.statusCode === 200) {
        console.log('replied with ' + res.statusCode + ' for ' + slackUrl + ' with ' + body); //eslint-disable-line no-console
      } else {
        console.error('replied with ' + res.statusCode + ' for ' + slackUrl); //eslint-disable-line no-console
      }
    });
  });

  req.write(postData);
  req.end();

  req.on('error', (err) => {
    console.error(err);  //eslint-disable-line no-console
    console.error('request errored for ' + slackUrl);  //eslint-disable-line no-console
  });
}

makeRequest(JSON.stringify(getSlackPayload()));

Then in GoCD tasks, add a task to call

make slack_passed