pr-emojis-in-slack

A GitHub Action that adds emoji reactions to Slack messages when PRs are reviewed, approved, merged, or closed.

Setup

1. Create a Slack app Oauth Bot Token scopes: reactions:read, reactions:write, channels:history, groups:history
2. Install the app to your workspace and note the Bot User ID and OAuth Token
3. Add the Bot User OAuth Token (xoxb-...) as a repository secret named SLACK_BOT_TOKEN
4. Add SLACK_CHANNEL_ID and SLACK_BOT_USER_ID as repository variables (Settings > Secrets and variables > Actions > Variables)
5. Create .github/workflows/pr-emojis.yml:

name: PR Emojis in Slack

on:
  pull_request_review:
    types: [submitted]
  pull_request:
    types: [opened, synchronize, closed]
  issue_comment:
    types: [created]

jobs:
  pr-emojis:
    runs-on: ubuntu-latest
    steps:
      - name: Run pr-emojis-in-slack
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          SLACK_CHANNEL_ID: ${{ vars.SLACK_CHANNEL_ID }}
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
          SLACK_BOT_USER_ID: ${{ vars.SLACK_BOT_USER_ID }}
        run: |
          curl -fsSL https://github.com/AdeptMind/pr-emojis-in-slack/releases/download/v1.1.1/pr-emojis-in-slack -o pr-emojis-in-slack
          chmod +x pr-emojis-in-slack
          ./pr-emojis-in-slack

Environment Variables

Variable	Required	Default	Description
GITHUB_TOKEN	Yes		GitHub token for API access — provided automatically by GitHub Actions
SLACK_BOT_TOKEN	Yes		Slack Bot User OAuth Token (xoxb-...)
SLACK_CHANNEL_ID	Yes		Slack channel to monitor
SLACK_BOT_USER_ID	Yes		Slack bot user ID
EMOJI_MONITORING	No	sparkles	Emoji added when PR is being monitored
EMOJI_REVIEW_STARTED	No	eyes	Emoji for review started
EMOJI_APPROVED	No	white_check_mark	Emoji for approval
EMOJI_CHANGES_REQUESTED	No	warning	Emoji for changes requested
EMOJI_COMMENTED	No	speech_balloon	Emoji for comments
EMOJI_MERGED	No	rocket	Emoji for merged PR
EMOJI_CLOSED	No	no_entry_sign	Emoji for closed PR
NUMBER_OF_APPROVALS_REQUIRED	No	1	Approvals needed for approved emoji