preview-book.yml

name: preview-site
on:
  workflow_run:
    workflows:
      - deploy-site
    types:
      - requested
      - completed
jobs:
  deploy:
    runs-on: ubuntu-latest
    defaults:
      run:
        shell: bash
    steps:
      - uses: actions/checkout@v2
      - name: Set message value
        run: |
          echo "comment_message=This pull request is being automatically built with [GitHub Actions](https://github.com/features/actions) and [Netlify](https://www.netlify.com/). To see the status of your deployment, click below." >> $GITHUB_ENV
      - name: Find Pull Request
        uses: actions/github-script@v4
        id: find-pull-request
        with:
          script: |
            let pullRequestNumber = ''
            let pullRequestHeadSHA = ''
            core.info('Finding pull request...')
            const pullRequests = await github.pulls.list({owner: context.repo.owner, repo: context.repo.repo})
            for (let pullRequest of pullRequests.data) {
              if(pullRequest.head.sha === context.payload.workflow_run.head_commit.id) {
                  pullRequestHeadSHA = pullRequest.head.sha
                  pullRequestNumber = pullRequest.number
                  break
              }
            }
            core.setOutput('number', pullRequestNumber)
            core.setOutput('sha', pullRequestHeadSHA)
            if(pullRequestNumber === '') {
              core.info(
                `No pull request associated with git commit SHA: ${context.payload.workflow_run.head_commit.id}`
              )
            }
            else{
              core.info(`Found pull request ${pullRequestNumber}, with head sha: ${pullRequestHeadSHA}`)
            }
      - name: Find Comment
        uses: peter-evans/find-comment@v1
        if: steps.find-pull-request.outputs.number != ''
        id: fc
        with:
          issue-number: '${{ steps.find-pull-request.outputs.number }}'
          comment-author: 'github-actions[bot]'
          body-includes: '${{ env.comment_message }}'
      - name: Create comment
        if: |
          github.event.workflow_run.conclusion != 'success'
          && steps.find-pull-request.outputs.number != ''
          && steps.fc.outputs.comment-id == ''
        uses: peter-evans/create-or-update-comment@v1
        with:
          issue-number: ${{ steps.find-pull-request.outputs.number }}
          body: |
            ${{ env.comment_message }}

            🚧 Deployment in progress for git commit SHA: ${{ steps.find-pull-request.outputs.sha }}
      - name: Update comment
        if: |
          github.event.workflow_run.conclusion != 'success'
          && steps.find-pull-request.outputs.number != ''
          && steps.fc.outputs.comment-id != ''
        uses: peter-evans/create-or-update-comment@v1
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          edit-mode: replace
          body: |
            ${{ env.comment_message }}

            🚧 Deployment in progress for git commit SHA: ${{ steps.find-pull-request.outputs.sha }}
      - name: Download Artifact site
        if: |
          github.event.workflow_run.conclusion == 'success'
          && steps.find-pull-request.outputs.number != ''
          && steps.fc.outputs.comment-id != ''
        uses: dawidd6/action-download-artifact@v2.14.1
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          workflow: deploy.yaml
          run_id: ${{ github.event.workflow_run.id }}
          name: site-zip
      - name: Unzip site
        if:  |
          github.event.workflow_run.conclusion == 'success'
          && steps.find-pull-request.outputs.number != ''
          && steps.fc.outputs.comment-id != ''
        run: |
          rm -rf _build/html
          unzip site.zip
          rm -f site.zip
      # Push the site's HTML to Netlify and get the preview URL
      - name: Deploy to Netlify
        if: |
          github.event.workflow_run.conclusion == 'success'
          && steps.find-pull-request.outputs.number != ''
          && steps.fc.outputs.comment-id != ''
        id: netlify
        uses: nwtgck/actions-netlify@v1.2
        with:
          publish-dir: _build/html
          production-deploy: false
          github-token: ${{ secrets.GITHUB_TOKEN }}
          enable-commit-comment: false
        env:
          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
        timeout-minutes: 5
      - name: Update site Preview comment
        if: |
          github.event.workflow_run.conclusion == 'success'
          && steps.find-pull-request.outputs.number != ''
          && steps.fc.outputs.comment-id != ''
        uses: peter-evans/create-or-update-comment@v1
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          edit-mode: replace
          body: |
            ${{ env.comment_message }}

            🔍 Git commit SHA:  ${{ steps.find-pull-request.outputs.sha }}
            ✅ Deployment Preview URL: ${{ steps.netlify.outputs.deploy-url }}