ci-notify-slack.yml

name: PR Slack Notification

on:
  pull_request:
    types: [review_requested]

jobs:
  notify-slack:
    name: Notify Slack
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Get requested team reviewers
        id: get-reviewers
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            return "requested_team" in context.payload ? context.payload.requested_team.name : ""
      - name: Lookup Slack channel
        id: lookup
        if: steps.get-reviewers.outputs.result != '""'
        run: |
          TEAM=${{ steps.get-reviewers.outputs.result }}
          CHANNEL=$(jq -r --arg team "$TEAM" '.[$team]' .github/workflows/team-channels.json)
          echo "channel=${CHANNEL}" >> $GITHUB_OUTPUT
          echo "message=${MESSAGE}" >> $GITHUB_OUTPUT
        env:
          MESSAGE: ":github: <${{ github.event.pull_request.html_url }}|${{ github.event.pull_request.title }}>"
      - name: Post to a Slack channel
        if: steps.get-reviewers.outputs.result != '""' && steps.lookup.outputs.channel != 'null'
        id: slack
        uses: slackapi/slack-github-action@6c661ce58804a1a20f6dc5fbee7f0381b469e001 # v1.25.0
        with:
          channel-id: ${{ steps.lookup.outputs.channel }}
          slack-message: "${{ steps.lookup.outputs.message }}"
        env:
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_API_TOKEN }}