on-workflow-end.yaml

name: Notify Slack on workflow completion

on:
  workflow_run:
    workflows:
      - "*"
    branches:
      - main
    types: [completed]

jobs:
  notify-slack:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Get Slack member IDs
        id: get-slack-id
        if: github.event.workflow_run.conclusion != 'success'
        run: |
          SLACK_ID=$(jq -r --arg GITHUB_USER "${{ github.actor }}" '.[$GITHUB_USER] // "Unknown"' .github/slack-users.json)
          echo "slack_id=$SLACK_ID" >> $GITHUB_OUTPUT

      - name: Set job-specific variables
        id: set-variables
        run: |
          if [[ "${{ github.event.workflow_run.conclusion }}" == "success" ]]; then
            echo "status_emoji=:white_check_mark:" >> $GITHUB_OUTPUT
            echo "view_text=View Success" >> $GITHUB_OUTPUT
            echo "footer=Congratulations! 🎉" >> $GITHUB_OUTPUT
          else
            echo "status_emoji=:fire:" >> $GITHUB_OUTPUT
            echo "view_text=View Failure" >> $GITHUB_OUTPUT
            echo "footer=Culprit: <@${{ steps.get-slack-id.outputs.slack_id }}>" >> $GITHUB_OUTPUT
          fi

      - uses: ravsamhq/notify-slack-action@v2
        with:
          status: ${{ github.event.workflow_run.conclusion }}
          notification_title: "${{github.event.workflow_run.name}} - ${{github.event.workflow_run.conclusion}} on ${{github.event.workflow_run.head_branch}} - <${{github.server_url}}/${{github.repository}}/actions/runs/${{github.event.workflow_run.id}}|${{ steps.set-variables.outputs.view_text }}>"
          message_format: "${{ steps.set-variables.outputs.status_emoji }} *${{github.event.workflow_run.name}}* ${{github.event.workflow_run.conclusion}} in <${{github.server_url}}/${{github.repository}}/${{github.event.workflow_run.head_branch}}|${{github.repository}}>"
          footer: ${{ steps.set-variables.outputs.footer }}
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}