CI Build Slack Notifier

Script is meant to be used with CI (continuous integration) server like Jenkins to notify about build state by sending messages to Slack. It is written as a simple alternative to offical Slack plugin for Jenkins. However, because this project is a simple Node.js script, it can be used with different continuous integration server than Jenkins. Moreover, it can be used without the CI server at all. In that case, it gets info from last GIT commit.

Notifier get build info and current commit from environment variables or last commit from GIT history, combine them with custom message and color and then send message to your Slack webhook. You can see the output below.

If you don't want to use Slack, you can show combined info in console, see options below.

Supported CIs

See package env-ci on npm.

Install

Install Node.js environment

This is Node script, so you must have installed Node.js environment. Use one of the options below to install Node.js:

• Use Node Version Manager (recommended)
• Use official Node.js distribution

You should be able to check node version with node --version now.

Install CI Build Notifier

Probably you need to install this script globally this way:

$ npm install -g ci-build-notifier

Usage

Now you can send messages by running the command ci-build-notifier with right options listed in table below.

Options

Shorthand	Option	Description
-g	--git-path	GIT root path
-u	--username	Bot username (optional, "Build notifier" if not set)
-i	--icon	Bot icon (optional, Jenkins icon if not set)
-t	--text	Message text
-a	--node-app-path	Node.js application path as a source for version (optional)
-v	--app-version	Set version manually (optional)
	--last-commit	Use last commit from GIT history instead of current commit from CI
-c	--color	Message hex color (optional)
	--use-console	Use console output instead of Slack
-s	--slack-webhook	Slack webhook URL (used only if --use-console is not set)

Run standalone

ci-build-notifier -a "./app" -g "./" -s "https://hooks.slack.com/services/XXXXXXXXX/YYYYYYYYY/ZZZZZZZZZZZZZZZZZZZZZZZZ" -c "#AAAAAA" -t "Build started"

Webhook URL is Slack Incoming Webhook, you can read more and create one here.

Run in Jenkins pipeline

pipeline {
  agent any
  stages {
    stage('Send start notification to Slack') {
      steps {
        sh 'ci-build-notifier -a "$WORKSPACE/app" -g "$WORKSPACE" -s "https://hooks.slack.com/services/XXXXXXXXX/YYYYYYYYY/ZZZZZZZZZZZZZZZZZZZZZZZZ" -c "#AAAAAA" -t "Build started"'
      }
    }
  }
}

Note: Jenkins set environment variable $WORKSPACE to the current build directory.

Build

If you want to modify and build changes, then you must recompile from TypeScript sources with command:

$ npm run build

Pull requests are welcome!

Thanks to

Authors of used libraries, especially author of env-ci.

Author

Lukas Novak

Freelance full-stack software developer based in Olomouc, Czech Republic. I focus on mobile apps with Kotlin and application servers in Node.js. As a hobby, I experiment with voice assistants and build my smart home. See my personal web page (in Czech) or blog on Medium