rust.yml

name: Rust

on:
  push:
  pull_request:

env:
  CARGO_TERM_COLOR: always

jobs:
  build:

    runs-on: ubuntu-latest

    # Force the cc crate to pick clang-19 so build.rs / cli/build.rs detect
    # a clang-like compiler and compile src/stack_interp.c with preserve_none
    # + musttail honored. Two reasons clang-19 specifically:
    #   1. The `clang` meta-package on ubuntu-latest currently installs
    #      clang 18.0-59~exp2 (a pre-1.0 snapshot from Debian experimental).
    #      preserve_none was added in upstream Clang 19 — Clang 18 silently
    #      ignores `__attribute__((preserve_none))` with a warning, falling
    #      back to System V cc, which makes musttail dispatch corrupt
    #      register state mid-loop and crashes iir_filter.lyte before its
    #      assert(true) ever runs.
    #   2. Ubuntu 24.04's stable clang-N packages cap at 18; clang-19+ has
    #      to come from apt.llvm.org.
    # Without clang at all, cc-rs picks gcc, is_like_clang() returns false,
    # has_stack_interp is never set, and the stack backend is stubbed out.
    env:
      CC: clang-19

    steps:
    - uses: actions/checkout@v5
    - name: Install clang-19 from apt.llvm.org
      run: |
        wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/llvm.gpg
        echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-19 main" | sudo tee /etc/apt/sources.list.d/llvm.list
        sudo apt-get update
        sudo apt-get install -y clang-19
    - name: Build
      run: cargo build --workspace --verbose
    - name: Run tests
      run: cargo test --workspace --verbose
    - name: Install Lua and LuaJIT
      run: |
        sudo apt-get install -y lua5.4 luajit
        sudo ln -sf /usr/bin/lua5.4 /usr/local/bin/lua
    - name: Run benchmarks
      run: |
        ./benchmark/run.sh 3 | tee benchmark_output.txt
    - name: Post benchmark results to job summary
      if: always()
      run: |
        echo '## Benchmark Results (Ubuntu x86_64)' >> $GITHUB_STEP_SUMMARY
        echo '```' >> $GITHUB_STEP_SUMMARY
        cat benchmark_output.txt >> $GITHUB_STEP_SUMMARY
        echo '```' >> $GITHUB_STEP_SUMMARY

  build-macos:

    runs-on: macos-latest

    steps:
    - uses: actions/checkout@v5
    - name: Install arm64 LLVM 18 and libffi
      run: brew install llvm@18 libffi
    - name: Build
      run: cargo build --workspace --verbose
    - name: Run tests
      run: cargo test --workspace --verbose
    - name: Build with LLVM
      env:
        LLVM_SYS_180_PREFIX: /opt/homebrew/opt/llvm@18
        LIBRARY_PATH: /opt/homebrew/opt/llvm@18/lib
      run: cargo build -p lyte -p lyte-cli --features llvm --verbose
    - name: Run tests with LLVM
      env:
        LLVM_SYS_180_PREFIX: /opt/homebrew/opt/llvm@18
        LIBRARY_PATH: /opt/homebrew/opt/llvm@18/lib
      run: cargo test -p lyte -p lyte-cli --features llvm --verbose
    - name: Run freeverb FFI benchmark
      env:
        LLVM_SYS_180_PREFIX: /opt/homebrew/opt/llvm@18
        LIBRARY_PATH: /opt/homebrew/opt/llvm@18/lib
      run: |
        ./benchmark/run-freeverb.sh 3 10000 | tee freeverb_output.txt
    - name: Post freeverb results to job summary
      if: always()
      run: |
        echo '## Freeverb FFI Benchmark (macOS ARM64, LLVM)' >> $GITHUB_STEP_SUMMARY
        echo '```' >> $GITHUB_STEP_SUMMARY
        cat freeverb_output.txt >> $GITHUB_STEP_SUMMARY
        echo '```' >> $GITHUB_STEP_SUMMARY
    - name: Install x86_64 Homebrew
      # The xcframework's macOS x86_64 slice is built with cross-compiled
      # LLVM, which requires a native x86_64 llvm-config + libs. Install
      # an independent Homebrew under /usr/local via Rosetta so it can
      # coexist with the arm64 Homebrew at /opt/homebrew.
      run: |
        NONINTERACTIVE=1 arch -x86_64 /bin/bash -c \
          "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
    - name: Install x86_64 LLVM 18 and libffi
      run: arch -x86_64 /usr/local/bin/brew install llvm@18 libffi
    - name: Build xcframework
      run: ./build-xcframework.sh
    - name: Install Lua and LuaJIT
      run: brew install lua luajit
    - name: Run benchmarks
      run: |
        ./benchmark/run.sh 3 | tee benchmark_output.txt
    - name: Post benchmark results to job summary
      if: always()
      run: |
        echo '## Benchmark Results (macOS ARM64)' >> $GITHUB_STEP_SUMMARY
        echo '```' >> $GITHUB_STEP_SUMMARY
        cat benchmark_output.txt >> $GITHUB_STEP_SUMMARY
        echo '```' >> $GITHUB_STEP_SUMMARY

  fuzz:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v5
    - name: Install nightly toolchain
      run: rustup toolchain install nightly --profile minimal
    - name: Install cargo-fuzz
      run: cargo +nightly install cargo-fuzz
    - name: Fuzz lexer (30s)
      run: cargo +nightly fuzz run lexer -- -max_total_time=30
    - name: Fuzz parser (30s)
      run: cargo +nightly fuzz run parser -- -max_total_time=30
    - name: Fuzz checker (30s)
      run: cargo +nightly fuzz run checker -- -max_total_time=30
    - name: Fuzz compile_jit (30s)
      run: cargo +nightly fuzz run compile_jit -- -max_total_time=30
    - name: Fuzz compile_vm (30s)
      run: cargo +nightly fuzz run compile_vm -- -max_total_time=30
    - name: Differential fuzz JIT vs VM (30s)
      run: cargo +nightly fuzz run differential -- -max_total_time=30
    - name: List fuzz artifacts on failure
      if: failure()
      run: find fuzz/artifacts -type f -print
    - name: Upload fuzz artifacts on failure
      if: failure()
      uses: actions/upload-artifact@v4
      with:
        name: fuzz-artifacts-ubuntu
        path: fuzz/artifacts/
        if-no-files-found: ignore
        retention-days: 14

  build-llvm:

    runs-on: ubuntu-latest

    env:
      LLVM_SYS_180_PREFIX: /usr/lib/llvm-18
      LIBRARY_PATH: /usr/lib/llvm-18/lib

    steps:
    - uses: actions/checkout@v5
    - name: Install LLVM 18
      run: |
        wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
        sudo add-apt-repository "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-18 main"
        sudo apt-get update
        sudo apt-get install -y llvm-18-dev libpolly-18-dev libzstd-dev
    - name: Build with LLVM
      run: cargo build -p lyte -p lyte-cli --features llvm --verbose
    - name: Run tests with LLVM
      run: cargo test -p lyte -p lyte-cli --features llvm --verbose
    - name: Install nightly toolchain
      run: rustup toolchain install nightly --profile minimal
    - name: Install cargo-fuzz
      run: cargo +nightly install cargo-fuzz
    - name: Differential fuzz JIT vs VM vs LLVM (30s)
      run: cargo +nightly fuzz run differential --features llvm -- -max_total_time=30
    - name: List fuzz artifacts on failure
      if: failure()
      run: find fuzz/artifacts -type f -print
    - name: Upload fuzz artifacts on failure
      if: failure()
      uses: actions/upload-artifact@v4
      with:
        name: fuzz-artifacts-llvm
        path: fuzz/artifacts/
        if-no-files-found: ignore
        retention-days: 14
    - name: LLVM backend stress test (10 runs)
      run: |
        for i in $(seq 1 10); do
          echo -n "Run $i: "
          ./target/debug/lyte tests/cases/slices/empty_string.lyte --backend llvm
        done