name: Deploy Docs

on:
  push:
    branches:
      - 'main'

env:
  CARGO_TERM_COLOR: always
  RUSTDOCFLAGS: --html-in-header header.html

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable

      - name: Install alsa and udev
        run: sudo apt-get update; sudo apt-get install --no-install-recommends libasound2-dev libudev-dev libwayland-dev libxkbcommon-dev

      #  This does the following:
      #   - Replaces the docs icon with one that clearly denotes it's not the released package on crates.io
      #   - Adds a meta tag that forces Google not to index any page on the site.
      - name: Pre-docs-build
        run: |
          sed -i.bak "s/icon.png/icon-docs-dev.png/" src/lib.rs
          echo "<meta name=\"robots\" content=\"noindex\">" > header.html

      - name: Build docs
        run: cargo doc --all-features --no-deps -p bevy

      #  This adds the following:
      #   - A top level redirect to the bevy crate documentation
      #   - A CNAME file for redirecting the docs domain to the API reference
      #   - A robots.txt file to forbid any crawling of the site (to defer to the docs.rs site on search engines).
      #   - A .nojekyll file to disable Jekyll GitHub Pages builds.
      - name: Finalize documentation
        run: |
          echo "<meta http-equiv=\"refresh\" content=\"0; url=bevy/index.html\">" > target/doc/index.html
          echo "dev-docs.bevyengine.org" > target/doc/CNAME
          echo "User-Agent: *\nDisallow: /" > target/doc/robots.txt
          touch target/doc/.nojekyll

      - name: Deploy
        uses: JamesIves/github-pages-deploy-action@v4
        with:
          branch: gh-pages
          folder: target/doc
          single-commit: true
          force: true