Example- Slack

Last updated 11th May 2021


The following example activity script will post a message to a Slack channel every time it is triggered.

To use it, paste it as-is into a .js file and then add it as a new script integration. Be sure to specify which events it should trigger on using the --events switch, and if desired which --environments you want.

Second, create a new Slack webhook through your Slack administrative interface. See the Slack documentation for how to do so. At the end you will be given a URL that points to https://hooks.slack.com/....

Third, add that URL to your project as a variable named SLACK_URL.

Now, any activities that meet the events/environment criteria you specified will get reported to Slack.

Once you have it working, you're free to modify the code below as desired. See the Slack messaging documentation for how to format more complex messages.

function getEnvironmentVariables() {
  return activity.payload.deployment.variables.reduce(
    (vars, { name, value }) => ({
      [name]: value,

const ENV_VARIABLES = getEnvironmentVariables();

 * Sends a color-coded formatted message to Slack.
 * You must first configure a Web PaaS variable named "SLACK_URL".
 * That is the group and channel to which the message will be sent.
 * To control what events it will run on, use the --events switch in
 * the Web PaaS CLI.
 * @param {string} title
 *   The title of the message block to send.
 * @param {string} message
 *   The message body to send.
function sendSlackMessage(title, message) {

  if (!url) {
    throw new Error("You must define a SLACK_URL project variable.");

  const messageTitle =
    title + (new Date().getDay() === 5) ? " (On a Friday! :calendar:)" : "";

  const color = activity.result === "success" ? "#66c000" : "#ff0000";

  const body = {
    attachments: [
        title: messageTitle,
        text: message,
        color: color,

  const resp = fetch(url, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
    body: JSON.stringify(body),

  if (!resp.ok) {
    console.log("Sending slack message failed: " + resp.body.text());

sendSlackMessage(activity.text, activity.log);

Common properties you may want to send to Slack (in the last line of the script) include:

  • activity.text: A brief, one-line statement of what happened.
  • activity.log: The complete build and deploy log output, as it would be seen in the Management Console log screen.

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