deploy-pr-docs.yml

name: Deploy PR docs to GitHub Pages
on:
  workflow_run:
    workflows:
      - 'Build docs from a pull request'
    types:
      - completed

jobs:
  deploy-built-docs:
    name: Deploy built docs to GitHub Pages
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    steps:
      - name: Download the docs artifact 📥
        uses: dawidd6/action-download-artifact@891cccee4b25d3306cf5edafa174ddc1d969871f
        with:
          workflow: build-pr-docs.yml
          commit: ${{ github.event.workflow_run.head_sha }}
          name: docs
          path: ./docs

      - name: Download the PR number artifact 📥
        uses: dawidd6/action-download-artifact@891cccee4b25d3306cf5edafa174ddc1d969871f
        with:
          workflow: build-pr-docs.yml
          name: pr_number

      - name: Add PR number to environment 🌎
        run: echo "PR_NUMBER=$(cat pr_number.txt)" >> $GITHUB_ENV

      - name: Publish 🚀
        uses: peaceiris/actions-gh-pages@bbdfb200618d235585ad98e965f4aafc39b4c501
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: docs
          destination_dir: ${{ env.PR_NUMBER }}
          keep_files: true

      - name: Post the URL on the PR 🖊
        uses: actions/github-script@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script:
            | # yeah, I know it's weird how you get PR comments with `.issues`
            const prComments = (await github.issues.listComments({
              issue_number: ${{ env.PR_NUMBER }},
              owner: context.repo.owner,
              repo: context.repo.repo,
            })).data;
            const docsURL = /Docs available on https:\/\/illright\.github\.io\/attractions\/\d+\//;
            if (prComments.find(
              comment => comment.user.login === 'github-actions[bot]' && docsURL.test(comment.body)
            ) != null) {
              return;
            }
            await github.issues.createComment({
              issue_number: ${{ env.PR_NUMBER }},
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: 'Docs available on https://illright.github.io/attractions/${{ env.PR_NUMBER }}/'
            });