pages.yml

name: Deploy Trace Viewer Demo

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

permissions:
  contents: write

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

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: dtolnay/rust-toolchain@stable

      - uses: Swatinem/rust-cache@v2

      - name: Build demo trace
        run: cargo run --example realistic_workload
        timeout-minutes: 5

      - name: Assemble site
        run: |
          mkdir -p _site
          cp dial9-tokio-telemetry/trace_viewer.html _site/trace_viewer.html
          cp realistic_trace.bin _site/demo.bin
          cp demo/index.html _site/index.html

      - name: Deploy (main)
        if: github.ref == 'refs/heads/main'
        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./_site

      - name: Deploy (PR preview)
        if: github.event_name == 'pull_request'
        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./_site
          destination_dir: pr/${{ github.event.number }}

      - name: Comment PR with preview link
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            const url = `https://${context.repo.owner}.github.io/${context.repo.repo}/pr/${context.issue.number}/`;
            const body = `🔍 **Trace Viewer Preview:** ${url}`;
            const { data: comments } = await github.rest.issues.listComments({
              ...context.repo, issue_number: context.issue.number
            });
            const existing = comments.find(c => c.body.includes('Trace Viewer Preview'));
            if (existing) {
              await github.rest.issues.updateComment({ ...context.repo, comment_id: existing.id, body });
            } else {
              await github.rest.issues.createComment({ ...context.repo, issue_number: context.issue.number, body });
            }