name: Notify about production deployment

# **What it does**: Posts a comment on the PR whose merge got into production.
# **Why we have it**: So that the PR author can be informed when their merged PR is in production.
# **Who does it impact**: Writers

on:
  workflow_dispatch:
  workflow_run:
    # Note, we could do this after the "Purge Fastly" finished
    workflows: ['Azure Production - Build and Deploy']
    types:
      - completed

permissions:
  contents: read
  pull-requests: write

jobs:
  find-pr-and-post-comment:
    if: ${{ github.repository == 'github/docs-internal' }}
    runs-on: ubuntu-latest
    steps:
      - name: Check out repo
        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8

      - uses: ./.github/actions/node-npm-setup

      # The "Purge Fastly" action takes about 6 minutes to purge all
      # languages. First does the language agnostic URLs, then English,
      # then all the other languages.
      # So it takes about ~30 seconds until it has sent the purge for
      # all English docs.
      - name: Sleep a little to give Fastly Purge a chance
        run: sleep 30

      - name: Find last PR
        id: get-number
        timeout-minutes: 3
        env:
          GITHUB_TOKEN: ${{ secrets.DOCUBOT_REPO_PAT }}
        run: .github/actions-scripts/find-past-built-pr.js

      - name: Find content directory changes comment
        if: ${{ steps.get-number.outputs.number != '' }}
        uses: peter-evans/find-comment@f4499a714d59013c74a08789b48abe4b704364a0
        id: findComment
        with:
          issue-number: ${{ steps.get-number.outputs.number }}
          comment-author: 'github-actions[bot]'
          body-includes: '<!-- GONE_TO_PRODUCTION -->'

      - name: Update comment
        if: ${{ steps.get-number.outputs.number != '' }}
        uses: peter-evans/create-or-update-comment@3383acd359705b10cb1eeef05c0e88c056ea4666
        with:
          comment-id: ${{ steps.findComment.outputs.comment-id }}
          issue-number: ${{ steps.get-number.outputs.number }}
          body: |
            <!-- GONE_TO_PRODUCTION -->
            🚀 **This pull request has gone into production!**

            The SHA of https://docs.github.com/_build matches the merge commit in this PR.

            If you don't see updates when expected, try adding a random query string to the URL like `?bla=1234` and see if that helps.
            If that shows the expected content, it would indicate that the CDN is "overly caching" the page still. It will eventually update, but it can take a while.
          edit-mode: replace