ci.yml

name: AIC Build, Test, Deploy

permissions: {}

on:
  pull_request:
  workflow_dispatch:
  push:
    branches:
      # Test everything that goes on on main.
      - main
      # The special branch “ci” is used for testing CI behaviors even without a PR.
      - ci
      # next/* branches are used for testing with future versions of dependencies,
      # usually by way of `[patch]`ing a dependency, thus won’t have outstanding PRs.
      - "next/*"

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
  # Collect backtrace on panic.
  RUST_BACKTRACE: 1
  # Tell `anyhow` *not* to collect backtraces for errors.
  # <https://users.rust-lang.org/t/anyhow-backtraces/107437>
  RUST_LIB_BACKTRACE: 0

jobs:
  build:
    strategy:
      fail-fast: false
      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@v1.3.1
      if: ${{ matrix.os == 'ubuntu' }}
      with:
        large-packages: false # slow
        swap-storage: false

    - run: df -h .

    - uses: actions/checkout@v4

    - run: df -h .

    - name: Set Rust toolchain
      # The rust-toolchain.toml file specifies the targets and components we need,
      # but we may want to override the toolchain.
      if: ${{ matrix.toolchain != 'stable' }}
      run: |
          sed -i.origstable "s/stable/${{ matrix.toolchain }}/" rust-toolchain.toml
          rustup show  # triggers installation of selected 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 libudev-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`
      # libudev-dev: needed for gamepad input via `gilrs`

    - run: df -h .

    # Load cache before doing any Rust builds
    - uses: Swatinem/rust-cache@v2.7.3
      with:
        # This is not necessary for keying, but makes the GHA cache viewing page more helpful.
        prefix-key: "v1-rust-${{ matrix.os }}-${{ matrix.toolchain }}-${{ matrix.depversions }}"
        # Override the default job-id-based key explicitly so that our dependent jobs can
        # reuse this cache.
        shared-key: "build"
        workspaces: |
          ./
          all-is-cubes-wasm/

    - 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 tools
      # Note: Swatinem/rust-cache will cache these installed binaries, so we don't have to worry
      # about caching the builds of them.
      # cargo-mutants is not used in this step but it will be cached for later use.
      run: |
        cargo install --locked wasm-pack@0.13.0 cargo-about@0.6.1
        # Not locked so that we can have a newer `syn` than is in the lockfile
        cargo install cargo-mutants@24.9.0


    - run: df -h .

    - name: Compile 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 tests
      run: cargo xtask --scope=only-normal test --timings

    - run: df -h .

    # Save the test-renderers results so we can download and view them
    - name: Save test-renderers output
      if: ${{ always() }}
      uses: actions/upload-artifact@v4
      with:
        name: test-renderers-output ${{ matrix.os }} ${{ matrix.toolchain }} ${{ matrix.depversions }}
        path: |
          target/test-renderers-output/

    - run: df -h .

    # 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@v4
      with:
        name: cargo-timings build ${{ 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-pages-artifact@v3
      with:
        path: all-is-cubes-wasm/dist

    - run: df -h .

  deploy:
    needs: build
    runs-on: ubuntu-latest
    permissions:
      pages: write
      id-token: write
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
  
    # 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:
    # This action uses the artifact previously uploaded by actions/upload-pages-artifact
    - name: Deploy to GitHub Pages
      id: deployment
      uses: actions/deploy-pages@v4

  # Run `xtask lint`.
  #
  # This job is separate from the main "build" job so that:
  # * Lint results are delivered quickly by running them in parallel with other jobs.
  # * We build with `-Dwarnings` so the failures aren't silent, but don't want this to
  #   cause *re*building in the main build job and its cache.
  lint:
    strategy:
      fail-fast: false
      matrix:
        toolchain: ["stable", "nightly", "beta"]

    runs-on: ubuntu-latest
    continue-on-error: false

    env:
      RUSTFLAGS: '-Dwarnings'

    steps:
    - uses: actions/checkout@v4

    - name: Set Rust toolchain
      # The rust-toolchain.toml file specifies the targets and components we need,
      # but we may want to override the toolchain.
      if: ${{ matrix.toolchain != 'stable' }}
      run: |
          sed -i.origstable "s/stable/${{ matrix.toolchain }}/" rust-toolchain.toml
          rustup show  # triggers installation of selected toolchain

    - 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 libudev-dev

    - run: df -h .

    - uses: Swatinem/rust-cache@v2.7.3
      with:
        # We cannot reuse the cache from the `build` job, because `RUSTFLAGS=-Dwarnings`
        # would invalidate all cached artifacts anyway.
        prefix-key: "v1-rust-${{ matrix.toolchain }}"
        shared-key: "lint"
        # Job's likely to fail and yet have useful cache material.
        cache-on-failure: true
        workspaces: |
          ./
          all-is-cubes-wasm/

    - name: Install tools
      run: |
        cargo install --locked wasm-pack@0.13.0

    - run: df -h .

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

    # Kludge: Avoid dependency on `cargo-about` by making the generated license info file look fresh.
    - name: Skip license generation
      run: touch all-is-cubes-wasm/static/third-party-licenses.html

    - name: Lint
      run: cargo xtask --scope=only-normal lint --timings
    
    - run: df -h .

    - name: Save cargo --timings output
      if: ${{ always() }}
      uses: actions/upload-artifact@v4
      with:
        name: cargo-timings lint ${{ matrix.toolchain }}
        path: |
          target/cargo-timings/cargo-timing-*.html

  # Run `xtask test-more` to look for broken `features`.
  features:
    # Don't spend time on this if the normal builds failed.
    # Also, we reuse the cache from it.
    needs: build
    runs-on: ubuntu-latest
    continue-on-error: false

    steps:
    # Free some disk space so our largest builds can complete reliably.
    - uses: jlumbroso/free-disk-space@v1.3.1
      with:
        large-packages: false # slow
        swap-storage: false

    - uses: actions/checkout@v4

    - 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 libudev-dev

    # Load cache before doing any Rust builds
    - uses: Swatinem/rust-cache@v2.7.3
      with:
        # Reuse the cache from the normal `build` job instead of creating an independent one,
        # to reduce redundant work and save disk space — but don't *write* to that cache, so
        # we don't bloat it or conflict.
        prefix-key: "v1-rust-ubuntu-stable-locked"
        shared-key: "build"
        save-if: false
        workspaces: |
          ./
          all-is-cubes-wasm/

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

    - name: Install tools
      # These should already be installed but we might have a cache miss, so don't fail in that case.
      run: |
        cargo install --locked wasm-pack@0.13.0 cargo-about@0.6.1

    - run: df -h .

    # Run tests in `test-more` mode which exercises each library's features.
    - name: Run exhaustive tests
      run: cargo xtask --scope=only-normal test-more --timings

    - run: df -h .

    # 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@v4
      with:
        name: cargo-timings features
        path: |
          target/cargo-timings/cargo-timing-*.html

  deny:
    runs-on: ubuntu-latest
    
    # next/* branches are expected to have git dependencies or otherwise break cargo-deny rules,
    # so don't run cargo-deny on them. We still want to do so in pull requests, but that doesn't
    # need a special rule because according to the GitHub docs, this will not be the branch name:
    # “For pull requests, the format is `<pr_number>/merge`.”
    # -- <https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/accessing-contextual-information-about-workflow-runs#github-context>
    if: ${{ !startsWith(github.ref, 'refs/heads/next/') }}
    
    steps:
    - uses: actions/checkout@v4

    - uses: EmbarkStudios/cargo-deny-action@v2.0.1
      with:
        # disables default --all-features
        arguments:
        command-arguments: --config=tools/deny.toml 

  # Run mutation testing against the changed code
  # Based on example from https://mutants.rs/pr-diff.html
  incremental-mutants:
    runs-on: ubuntu-latest
    # Running on push would require more work to determine the base revision
    if: github.event_name == 'pull_request'
    steps:
      - uses: actions/checkout@v4
        with:
          # Needed to ensure `main` branch is needed
          fetch-depth: 0

      # Load cache before doing any Rust builds
      # Note: we aren't depending on the build job so this cache might be stale, but the
      # shorter time-to-useful-results seems worth it.
      - uses: Swatinem/rust-cache@v2.7.3
        with:
          # Reuse the cache from the normal `build` job instead of creating an independent one,
          # to reduce redundant work and save disk space — but don't *write* to that cache, so
          # we don't bloat it.
          prefix-key: "v1-rust-ubuntu-stable-locked"
          shared-key: "build"
          save-if: false
          workspaces: |
            ./
            all-is-cubes-wasm/

      # Install cargo-mutants
      # This should usually be already installed, but is present in case of cache miss
      # Not locked so that we can have a newer `syn` than is in the lockfile
      - run: cargo install cargo-mutants@24.9.0

      - name: Relative diff
        run: |
          git branch -av
          git diff origin/${{ github.base_ref }}.. | tee git.diff
      
      - name: Mutants
        # See mutants.yml for notes on the package selection
        run: cargo mutants --in-diff git.diff --package all-is-cubes -- --all-features

      - uses: actions/upload-artifact@v4
        if: ${{ always() }}
        with:
          name: mutants-incremental.out
          path: mutants.out

  miri:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v4

    - uses: Swatinem/rust-cache@v2.7.3

    - name: Install Rust toolchain
      run: |
        rustup toolchain install nightly --component miri
    
    - name: Run Miri tests, std
      # `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:: --features std
    
    - name: Run Miri tests, no_std
      run: |
        cargo +nightly miri test --no-default-features -p all-is-cubes universe::

  no_std:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v4

    # The build is faster *without* this cache.
    # - uses: Swatinem/rust-cache@v2.7.3

    - name: Install Rust toolchain
      run: |
        rustup toolchain install stable --profile minimal
        rustup target add thumbv7em-none-eabihf

    # TODO: move this command into xtask so it centrally tracks package info like "no_std compatible"

    - name: no_std lint
      run: |
        cargo clippy --target=thumbv7em-none-eabihf --no-default-features -p all-is-cubes -p all-is-cubes-render -p all-is-cubes-ui -p all-is-cubes-mesh

    - name: no_std build
      # This is `cargo build`, not `cargo check`, because `cargo check` won't detect problems like
      # use of undefined linker symbols. Not sure if that matters.
      run: |
        cargo build --target=thumbv7em-none-eabihf --no-default-features -p all-is-cubes -p all-is-cubes-render -p all-is-cubes-ui -p all-is-cubes-mesh

  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@v4

    # Cache both the main workspace (for xtask builds) and the fuzzing workspace
    - uses: Swatinem/rust-cache@v2.7.3
      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@v4
      with:
        # Failed runs are useful to cache since they expand the corpus
        save-always: true
        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@v4
      with:
        name: fuzz-artifacts
        path: fuzz/artifacts