pr-notifier.yml

name: Post PR to Slack

on:
  pull_request:
    types:
      - opened
      - converted_to_draft
      - ready_for_review
      - reopened
      - closed

  pull_request_review:
    types:
      - submitted

env:
  CONFIG: |
    {
      "opened": {
        "icon": "${{ github.event.pull_request.draft && '📝' || '🆕' }}",
        "status": "${{ github.event.pull_request.draft && 'opened as draft' || 'opened' }}"
      },
      "converted_to_draft": {
        "icon": "📝",
        "status": "converted to draft"
      },
      "ready_for_review": {
        "icon": "👀",
        "status": "ready for review"
      },
      "reopened": {
        "icon": "🔄",
        "status": "reopened"
      },
      "submitted": {
        "icon": "${{ github.event.review.state == 'approved' && '✅' || '💬' }}",
        "status": "${{ github.event.review.state == 'approved' && 'code review approved' || 'code review comments' }}"
      },
      "closed": {
        "icon": "${{ github.event.pull_request.merged && '🚀' || '🗑️' }}",
        "status": "${{ github.event.pull_request.merged && 'merged' || 'closed' }}"
      }
    }

jobs:
  notify:
    name: Slack notify
    runs-on: ubuntu-24.04
    if: ${{ !contains(github.event.pull_request.head.ref || github.head_ref || github.ref, 'dependabot/') }}

    steps:
      - name: Build Slack JSON
        uses: actions/github-script@v7
        id: payload
        if: github.event.action != 'submitted' || github.event.review.state == 'approved'

        env:
          ACTION_ICON: ${{ fromJSON(env.CONFIG)[github.event.action].icon }}
          ACTION_STATUS: ${{ fromJSON(env.CONFIG)[github.event.action].status }}

        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const title = ${{ toJson(github.event.pull_request.title) }}
            const username = ${{ toJson(github.event.pull_request.user.login) }}
            const profileUrl = ${{ toJson(github.event.pull_request.user.html_url) }}

            const { pull_request } = context.payload
            const { owner, repo } = context.repo

            // Format as Slack mrkdwn
            const titleFormatted = `<${pull_request.html_url}|*${title}* #${pull_request.number}>`
            const profileFormatted = `<${profileUrl}|@${username}>`

            // Payload output is JSON encoded
            return {
              channel: '${{ vars.SLACK_CHANNEL_ID }}',
              blocks: [
                {
                  type: 'section',
                  text: {
                    type: 'mrkdwn',
                    text: `${owner}/*${repo}*: ${titleFormatted} by ${profileFormatted} ${{ env.ACTION_ICON }} ${{ env.ACTION_STATUS }}`
                  }
                }
              ],
              unfurl_links: false,
              unfurl_media: false
            }

      - name: Post to Slack
        uses: slackapi/slack-github-action@v2.0.0
        if: github.event.action != 'submitted' || github.event.review.state == 'approved'

        with:
          method: chat.postMessage
          token: ${{ secrets.SLACK_BOT_TOKEN }}
          payload: ${{ steps.payload.outputs.result }}