Send Slack Notification Action

Send a notification to Slack in one action. This action can be used to send customized notifications to Slack channels with information about the GitHub workflow run and job failures.

By default, it will send a notification with the following information with links where available:

• Custom title and message
• Head commit message
• Event type
• Triggering user
• Ref (Branch or Tag)
• Workflow run
• Commit hash
• Commit author

If a job within the workflow run fails, the action will reply to the original message with a list of failed jobs:

Authentication

To use this action, you need to provide a Slack bot token with the necessary permissions to post messages to the specified channel(s).

Inputs

Input	Description	Required
title	Title of the notification	Yes
message	Message body	Yes
channel_id	Comma separated list of channel IDs to send the notification to	Yes
slack_bot_token	Slack bot token	Yes

Tip

For Citizens Advice repositories there is an organisation-wide secret SLACK_BOT_TOKEN which you can use in private repositories for slack_bot_token input.

Outputs

Output	Description
message_ts	Slack message timestamp

Example usage

name: Deploy
on:
  push:
    branches:
      - main

jobs:
  deploy:
    name: Run Deployment
    runs-on: ubuntu-latest
    steps:
      - name: Deploy Environment
        run: deploy_environment()

  notify:
    name: Send Slack Notification
    runs-on: ubuntu-latest
    needs: deploy
    steps:
      - name: Notify Slack
        uses: citizensadvice/message-slack-action@v1
        with:
          title: 'Deployment Success'
          message: 'The deployment has succeeded'
          channel_id: 'C0123456789'
          slack_bot_token: ${{ secrets.SLACK_BOT_TOKEN }}
          github_token: ${{ secrets.GITHUB_TOKEN }}

  notify-failure:
    name: Notify Slack on Failure
    runs-on: ubuntu-latest
    needs: deploy
    if: failure()
    steps:
      - name: Notify Slack
        uses: citizensadvice/message-slack-action@v1
        with:
          title: 'Deployment Failed'
          message: 'The deployment has failed. Please check the details below.'
          failure: 'true'
          channel_id: 'C0123456789'
          slack_bot_token: ${{ secrets.SLACK_BOT_TOKEN }}
          github_token: ${{ secrets.GITHUB_TOKEN }}

Releases

The release v1 will be updated to point to a new tag when bug fixes are made. This is done with:

git tag -f v1 && git push --tags --force

New releases will be create if the interfaces are changed.