name: Build gh-pages

on:
    schedule:
        - cron: "0 23 * * *"

jobs:
    get-melt-changed:
        uses: ./.github/workflows/get-melt-changed.yml
    deploy:
        runs-on: ubuntu-latest
        needs: [get-melt-changed]
        if: needs.get-melt-changed.outputs.melt_changed == 'true'
        permissions:
            contents: write # To push a branch
            pull-requests: write # To create a PR from that branch
        steps:
            - uses: actions/checkout@v4
              with:
                  fetch-depth: 0
            - name: Setup Rust
              uses: actions-rs/toolchain@v1
              with:
                  toolchain: stable
                  target: wasm32-unknown-unknown
                  override: true
            - name: Install Trunk
              uses: jetli/trunk-action@v0.4.0
              with:
                  version: "latest"
            - name: Deploy GitHub Pages
              run: |
                  cd demo
                  trunk build --release
                  git worktree add gh-pages
                  git config user.name "Deploy demo from CI"
                  git config user.email ""
                  cd gh-pages
                  # Delete the ref to avoid keeping history.
                  git update-ref -d refs/heads/gh-pages
                  rm -rf *
                  mv ../dist/* .
                  git add .
                  git commit -m "Deploy demo $GITHUB_SHA to gh-pages"
                  git push --force --set-upstream origin gh-pages