preview.yml

name: Preview

on:
  pull_request_target:

jobs:
  preview:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - uses: actions/checkout@v4
      - uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { owner, repo } = context.repo;
            const { number } = context.issue;
            const pr = await github.rest.pulls.get({
              owner,
              repo,
              pull_number: number,
            });
            const { merge_commit_sha } = pr.data;
            const head_sha = pr.data.head.sha;
            const link = `https://stackblitz.com/github/mlflow/mlflow-website/tree/${merge_commit_sha}/website`;
            const marker = "<!-- PREVIEW -->";
            const body = `
            ${marker}

            ## Preview for ${head_sha}

            - For faster build, the doc pages are not included in the preview.
            - Redirects are disabled in the preview.

            <a href="${link}" target="_blank">
              <img
                alt="Open in StackBlitz"
                src="https://developer.stackblitz.com/img/open_in_stackblitz.svg"
              />
            </a>
            `;
            const comments = await github.paginate(github.rest.issues.listComments, {
              owner,
              repo,
              issue_number: number,
            });
            const comment = comments.find(({ body }) => body.includes(marker));
            if (comment) {
              await github.rest.issues.updateComment({
                comment_id: comment.id,
                owner,
                repo,
                body,
              });
            } else {
              await github.rest.issues.createComment({
                issue_number: number,
                owner,
                repo,
                body,
              });
            }