Post GitHub Action deploy workflow progress notifications to Slack.

• Posts summary message at beginning of the deploy workflow, surfacing commit message and author
• Maps GitHub commit author to Slack user by full name, mentioning them in the summary message
• Threads intermediate stage completions, sending unexpected failures back to the channel
• Adds summary message reaction to unsuccessful jobs (useful with Reacji Channeler)
• Updates summary message duration at conclusion of the workflow
• Supports pull_request, push, release, schedule, and workflow_dispatch event types

1. Create a Slack App for your workspace
2. Under OAuth & Permissions, add two Bot Token Scopes:
   1. chat:write to post messages
   2. chat:write.customize to customize messages with GitHub commit author
   3. reactions:write to add summary message error reactions
   4. users:read to map GitHub user to Slack user
3. Install the app to your workspace
4. Copy the app's Bot User OAuth Token from the OAuth & Permissions page
5. Create a GitHub secret with this token, named SLACK_DEPLOY_BOT_TOKEN
6. Invite the bot user into the Slack channel you will post messages to (/invite @bot_user_name)
7. Click the Slack channel name in the header, and copy its Channel ID from the bottom of the dialog

name: Deploy

on:
  push:
    branches:
      - main

# 1. Configure environment variables
env:
  SLACK_DEPLOY_BOT_TOKEN: ${{ secrets.SLACK_DEPLOY_BOT_TOKEN }} # required
  SLACK_DEPLOY_CHANNEL: 'C040YVCUDRR' # required - replace with your Slack Channel ID
  SLACK_DEPLOY_ERROR_REACTION: 'x' # optional emoji name added as non-successful summary message reaction

jobs:
  staging:
    runs-on: ubuntu-latest
    outputs:
      slack_ts: ${{ steps.slack.outputs.ts }}
    steps:
      # 2. Post summary message at the beginning of your workflow
      - name: Post to Slack
        uses: Fieldguide/action-slack-deploy-pipeline@v2
        id: slack

      - name: Deploy to staging
        run: sleep 10 # replace with your deploy steps

      # 3. Post threaded stage updates throughout
      - name: Post to Slack
        uses: Fieldguide/action-slack-deploy-pipeline@v2
        if: always()
        with:
          thread_ts: ${{ steps.slack.outputs.ts }}

  production:
    needs:
      - staging
    runs-on: ubuntu-latest
    steps:
      - name: Deploy to production
        run: sleep 5 # replace with your deploy steps

      # 4. Post last "conclusion" stage
      - name: Post to Slack
        uses: Fieldguide/action-slack-deploy-pipeline@v2
        if: always()
        with:
          thread_ts: ${{ needs.staging.outputs.slack_ts }}
          conclusion: true

1. Configure required SLACK_DEPLOY_BOT_TOKEN and SLACK_DEPLOY_CHANNEL environment variables.
2. Use this action at the beginning of your workflow to post a "Deploying" message in your configured channel.
3. As your workflow progresses, use this action with the thread_ts input to post threaded replies.
4. Denote the last step with the conclusion input to update the initial message's status.