pr_deploy.yml

---
name: PR Deploy

on:
  workflow_run:
    workflows:
      - "PR Build"
    types:
      - completed

concurrency:
  group: preview-${{ github.ref }}
  cancel-in-progress: true

jobs:
  deploy-site-preview:
    runs-on: ubuntu-latest
    name: Deploy site preview
    steps:
      - name: Checkout sources
        uses: actions/checkout@v3
        with:
          ssh-key: ${{ secrets.DEPLOY_KEY }}
          ref: gh-pages

      - name: Download site artifacts
        uses: actions/github-script@v6.3.3
        with:
          script: |
            let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
                owner: context.repo.owner,
                repo: context.repo.repo,
                run_id: context.payload.workflow_run.id,
            });
            let matchArtifact = allArtifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "site-artifacts"
            })[0];
            let download = await github.rest.actions.downloadArtifact({
                owner: context.repo.owner,
                repo: context.repo.repo,
                artifact_id: matchArtifact.id,
                archive_format: 'zip',
            });
            let fs = require('fs');
            fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/site-artifacts.zip`, Buffer.from(download.data));

      - name: Unzip site artifacts
        run: unzip site-artifacts.zip

      - name: Grab PR info
        id: pr-info
        run: |
          number=$(cat pr_number)
          echo "number=$number" >> $GITHUB_OUTPUT

      - name: Configure git
        run: |
          git config user.name "${{ github.actor }}"
          git config user.email "${{ github.actor }}@users.noreply.github.com"

      - name: Create preview target
        run: |
          mkdir -p pr-previews/pr-${{ steps.pr-info.outputs.number }}
          cp -rf _site/* pr-previews/pr-${{ steps.pr-info.outputs.number }}

      - name: Remove robots.txt from preview
        run: rm pr-previews/pr-${{ steps.pr-info.outputs.number }}/robots.txt

      - name: Count changed
        id: git_status
        run: |
            changedCount=$(git status pr-previews/pr-${{ steps.pr-info.outputs.number }} --porcelain=v1 --short --untracked-files=all | wc -l)
            echo "changedCount=$changedCount" >> "$GITHUB_OUTPUT"

      - name: Push preview target
        if: steps.git_status.outputs.changedCount > 0
        run: |
          git add pr-previews/pr-${{ steps.pr-info.outputs.number }}
          git commit -m "docs: deployed preview for pr #${{ steps.pr-info.outputs.number }}"
          git push origin gh-pages

      - name: Create a preview link
        if: steps.git_status.outputs.changedCount > 0
        id: pr_preview
        run: |
          cnameFile="CNAME"
          if [ -f "$cnameFile" ]; then
              cname=$(<$cnameFile)
              echo "link=https://$cname/pr-previews/pr-${{ steps.pr-info.outputs.number }}/" >> "$GITHUB_OUTPUT"
          else
              owner="${{ github.event.repository.owner.login }}"
              echo "link=https://$owner.github.io/pr-previews/pr-${{ steps.pr-info.outputs.number }}/" >> "$GITHUB_OUTPUT"
          fi

      - name: Comment with the preview link
        if: steps.git_status.outputs.changedCount > 0
        uses: marocchino/sticky-pull-request-comment@v2.2.0
        with:
          header: site-preview
          number: ${{ steps.pr-info.outputs.number }}
          message: |
            :rocket: Deployed site preview ${{ steps.pr_preview.outputs.link }}

            * will be up and ready in a couple of minutes.