ci.yml

name: AIC Build, Test, Deploy

permissions: {}

on:
  pull_request:
  workflow_dispatch:
  push:
    branches:
      - main
      - ci

env:
  CARGO_TERM_COLOR: always
  # Disable incremental compilation because we aren't caching incremental compilation
  # artifacts, so they won't be useful for anything (other than maybe the exhaustive
  # builds with different features).
  CARGO_INCREMENTAL: 0
  RUST_BACKTRACE: 1

jobs:
  build:
    strategy:
      matrix:
        # This matrix doesn't do any actual Cartesian products, but instead has a
        # basic configuration (Linux, stable Rust, using lockfile) and also tries
        # changing one of those parameters but not the others.
        include:
          # This is the configuration we use for the wasm build and exhaustive tests.
          - os: ubuntu
            toolchain: stable
            depversions: locked
            primary: true
          # Additional configurations to try:

          # Windows
          - os: windows
            toolchain: stable
            depversions: locked
            primary: false
          
          # macOS
          - os: macos
            toolchain: stable
            depversions: locked
            primary: false
          
          # Nightly Rust
          # We test on this so that we can report new compiler bugs fast.
          # However, by the same premise, it breaks often.
          - os: ubuntu
            toolchain: nightly
            depversions: locked
            primary: false
          
          # Beta Rust (future stable release)
          # We test on this so that we can report compiler bugs that made it out of
          # nightly and their fixes should be backported, and so that we have signal
          # that is less unstable than nightly.
          - os: ubuntu
            toolchain: beta
            depversions: locked
            primary: false
          
          # Dependencies updated
          - os: ubuntu
            toolchain: stable
            depversions: latest
            primary: false
          
          # Dependencies reverted to minimal-versions
          - os: ubuntu
            toolchain: stable
            depversions: minimal
            primary: false


    runs-on: ${{ matrix.os }}-latest
    continue-on-error: ${{ !matrix.primary }}

    steps:
    # Free some disk space so our largest builds can complete reliably.
    - uses: jlumbroso/free-disk-space@v1.2.0
      if: ${{ matrix.os == 'ubuntu' }}
      with:
        large-packages: false # slow
        swap-storage: false

    - run: df -h .

    - uses: actions/checkout@v3.1.0

    - run: df -h .

    - name: Install Rust toolchain
      # Install exactly what we need: compiler, Cargo, clippy, rustfmt
      run: |
          rustup toolchain install "${{ matrix.toolchain }}" --profile=minimal --component=clippy --component=rustfmt
          rustup target add --toolchain="${{ matrix.toolchain }}" wasm32-unknown-unknown
          rustup override set "${{ matrix.toolchain }}"

    - name: Install nightly for -Z direct-minimal-versions
      if: ${{ matrix.depversions == 'minimal' }}
      run: rustup toolchain install nightly --profile=minimal 

    - name: Install native libraries
      if: ${{ runner.os == 'Linux' }}
      run: |
          sudo apt update
          sudo apt-get -y install libxrandr-dev xorg-dev libx11-xcb-dev libwayland-dev libasound2-dev
      # libxrandr-dev xorg-dev libx11-xcb-dev libwayland-dev: needed for windowing
      # Note that `libwayland-dev` provides the library called `wayland-client`
      # libasound2-dev: needed for audio via `kira`

    - run: df -h .

    # Load cache before doing any Rust builds
    - uses: Swatinem/rust-cache@v2.0.2

    - run: df -h .

    # break this out as a separate non-silenced build step
    - name: Compile xtask
      run: cargo build --package xtask

    - name: Update dependencies
      run: |
        cargo xtask update "${{ matrix.depversions }}"
        cargo tree --all-features

    - run: df -h .

    - name: Install wasm-pack
      run: cargo install wasm-pack@0.11.1
      # Use workspace target dir for cargo install's build, so that the build will be cached.
      env:
        CARGO_TARGET_DIR: target/

    - name: Install cargo-about
      run: cargo install cargo-about@0.5.6
      # Use workspace target dir for cargo install's build, so that the build will be cached.
      env:
        CARGO_TARGET_DIR: target/

    - run: df -h .

    # Run tests in `test-more` mode in the "primary" matrix configuration, and
    # run them in the faster mode (which does not try disabling/enabling
    # features) for all other variations.
    # This is because the exhaustive tests are intended to catch bugs in our own
    # code (a miswritten `cfg` or similar), and the testing against nightly and
    # latest versions is intended to catch bugs in *our dependencies*; and the
    # two are sufficiently unlikely to interact that it doesn't seem worth
    # spending the CI latency to do both.
    - name: Compile basic tests
      # compile is broken out so we have visibility into compile vs. run times
      run: cargo xtask --scope=only-normal test --timings --no-run
    - name: Run basic tests
      if: ${{ !matrix.primary }}
      run: cargo xtask --scope=only-normal test --timings

    - run: df -h .

    - name: Run exhaustive tests
      if: ${{ matrix.primary }}
      run: cargo xtask --scope=only-normal test-more --timings
    
    # Save the test-renderers results so we can download and view them
    - name: Save test-renderers output
      if: ${{ always() }}
      uses: actions/upload-artifact@v3
      with:
        name: test-renderers-output ${{ matrix.os }} ${{ matrix.toolchain }} ${{ matrix.depversions }}
        path: |
          target/test-renderers-output/

    - run: df -h .

    # Run clippy and docs to get warnings.
    - name: Lint
      run: cargo xtask --scope=only-normal lint --timings
    
    # Save timing reports so we can download and view them
    # (for understanding build performance in CI)
    - name: Save cargo --timings output
      if: ${{ always() }}
      uses: actions/upload-artifact@v3
      with:
        name: cargo-timings ${{ matrix.os }} ${{ matrix.toolchain }} ${{ matrix.depversions }}
        path: |
          target/cargo-timings/cargo-timing-*.html

    # Save wasm build so that we can optionally deploy it without rebuilding
    # (but only for the stablest matrix version)
    - name: Save wasm dist artifact
      if: ${{ matrix.primary }}
      uses: actions/upload-artifact@v3
      with:
        name: wasm-dist
        path: all-is-cubes-wasm/dist

    - run: df -h .

  deploy:
    needs: build
    runs-on: ubuntu-latest
    permissions:
      contents: write

    # Do this only if we are pushing to main, not to pull requests.
    # (Or if we're on a special 'pages-alt' branch, so we can experiment with
    # deployment before pushing to main.)
    #
    # Caution: GitHub's parsing is weird around multiline expressions so just don't.
    # https://github.community/t/how-to-write-multi-line-condition-in-if/128477
    if: ${{ github.event_name == 'push' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/pages-alt') }}

    steps:
    - name: Download wasm dist artifact
      uses: actions/download-artifact@v2
      with:
        name: wasm-dist
        path: dist-for-deploy
    - name: Deploy to GitHub Pages
      uses: crazy-max/ghaction-github-pages@v2
      with:
        target_branch: gh-pages
        build_dir: dist-for-deploy
        keep_history: false
        jekyll: false
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  miri:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v3.1.0

    - uses: Swatinem/rust-cache@v2.0.2
    
    - name: Install Rust toolchain
      run: |
        rustup toolchain install nightly --component miri
    
    - name: Run Miri tests
      # `universe::owning_guard` is the only module that contains nontrivial unsafe code,
      # and the tests in `universe` are those most worth running to exercise it.
      run: |
        cargo +nightly miri test --no-default-features -p all-is-cubes universe::
    
  fuzz:
    # Don't spend time on fuzzing if the build failed indicating the code is bad other ways
    needs: build
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v3.1.0

    # Cache both the main workspace (for xtask builds) and the fuzzing workspace
    - uses: Swatinem/rust-cache@v2.0.2
      with:
        workspaces: |
          .
          fuzz

    - name: Install Rust toolchain
      run: |
          rustup toolchain install nightly --profile=minimal --component=clippy --component=rustfmt
          rustup override set nightly

    - name: Install cargo-fuzz
      run: cargo install cargo-fuzz

    - name: Cache fuzzer corpus
      uses: actions/cache@v3
      with:
        key: fuzz-corpus
        path: |
          fuzz/corpus

    - name: Lint
      # We run lint because otherwise the fuzz code won't get linted.
      run: cargo xtask --scope=only-fuzz lint

    - name: Fuzz
      # Note: The specified timeout value is per-fuzz-target; as of this writing
      # there are 6 fuzz targets and so the total time will be 720 seconds = 12 minutes.
      run: cargo xtask --scope=only-fuzz fuzz 120

    # Save the fuzz artifacts so we can repro elsewhere
    - name: Save fuzz artifacts
      if: ${{ failure() }}
      uses: actions/upload-artifact@v3
      with:
        name: fuzz-artifacts
        path: fuzz/artifacts