deploy_docs.yml

name: Deploy Docs

on:
  workflow_run:
    workflows:
      - Build Docs
    types:
      - completed
jobs:
  deploy:
    name: Deploy Docs
    runs-on: ubuntu-latest
    steps:
      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
      
      - name: Get GitHub Pages Data
        uses: actions/github-script@v3
        id: pages-data
        with:
          script: |
            const result = await github.request('GET /repos/{owner}/{repo}/pages', {
              owner: context.repo.owner,
              repo: context.repo.repo
            })
            return result.data

      - name: Lock workflow
        uses: softprops/turnstyle@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          poll-interval-seconds: 10

      - name: Checkout docs branch
        uses: actions/checkout@v2
        with:
          ref: refs/heads/${{ fromJSON(steps.pages-data.outputs.result).source.branch }}

      - name: Download artifact
        uses: dawidd6/action-download-artifact@v2
        with:
          workflow: ${{ github.event.workflow_run.name }}
          run_id: ${{ github.event.workflow_run.id }}
          name: docs

      - name: Update versions
        run: python update_versions.py

      - name: Get SHA & ref
        run: |
          echo "GITHUB_SHA_SHORT=$(echo ${{ github.event.workflow_run.head_sha }} | cut -c 1-7)" >> $GITHUB_ENV
          echo "REF=$(cat ref.txt)" >> $GITHUB_ENV
          rm -f ref.txt

      - name: Deploy docs
        run: |
          git config user.name github-actions[bot]
          git config user.email 41898282+github-actions[bot]@users.noreply.github.com
          git add -A
          if ! git diff-index --quiet HEAD --; then
            echo "Deploying changes"
            git status
            git commit -m "Deploy docs from ${{ github.event.workflow_run.head_branch }} @ ${{ env.GITHUB_SHA_SHORT }}"
            git push -f
          else
            echo "No changes to deploy"
            exit 0
          fi

      - name: Find Comment
        if: ${{ contains(github.event.workflow_run.event, 'pull_request') }}
        uses: peter-evans/find-comment@v1
        id: fc
        with:
          issue-number: ${{ github.event.workflow_run.pull_requests[0].number }}
          comment-author: 'github-actions[bot]'
          body-includes: Docs preview for commit

      - name: Create comment
        if: ${{ contains(github.event.workflow_run.event, 'pull_request') && steps.fc.outputs.comment-id == 0}}
        uses: peter-evans/create-or-update-comment@v1
        with:
          issue-number: ${{ github.event.workflow_run.pull_requests[0].number }}
          edit-mode: replace
          body: |
            📝 Docs preview for commit ${{ env.GITHUB_SHA_SHORT }} at: ${{ fromJSON(steps.pages-data.outputs.result).html_url }}${{ env.REF }}/

      - name: Update comment
        if: ${{ contains(github.event.workflow_run.event, 'pull_request') && steps.fc.outputs.comment-id != 0 }}
        uses: peter-evans/create-or-update-comment@v1
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          edit-mode: replace
          body: |
            📝 Docs preview for commit ${{ env.GITHUB_SHA_SHORT }} at: ${{ fromJSON(steps.pages-data.outputs.result).html_url }}${{ env.REF }}/