rust.yml

name: Rust CI

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

env:
  CARGO_TERM_COLOR: always
  COVERAGE_THRESHOLD: "80"

jobs:
  lint:
    name: Format & Clippy
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install Rust (rustfmt + clippy)
        uses: dtolnay/rust-toolchain@stable
        with:
          toolchain: stable
          components: rustfmt, clippy
          targets: wasm32-unknown-unknown

      - name: Cache cargo registry and build output
        uses: Swatinem/rust-cache@v2

      - name: Check formatting
        run: cargo fmt --all -- --check

      - name: Clippy (deny warnings)
        run: cargo clippy --all-targets --all-features -- -D warnings

  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          toolchain: stable
          components: llvm-tools-preview
          targets: wasm32-unknown-unknown

      - name: Cache cargo registry and build output
        uses: Swatinem/rust-cache@v2

      - name: Install cargo-llvm-cov
        uses: taiki-e/install-action@cargo-llvm-cov
          
      - name: Build
        run: cargo build --verbose
        
      - name: Run tests
        run: cargo test --verbose

      - name: Enforce code coverage threshold
        run: |
          cargo llvm-cov clean --workspace
          cargo llvm-cov --workspace \
            --all-targets \
            --locked \
            --fail-under-lines "$COVERAGE_THRESHOLD" \
            --summary-only

      - name: Set up Python
        uses: actions/setup-python@v7
        with:
          python-version: '3.x'

      - name: Run Storage Layout Collision Check
        run: python scripts/storage-layout-check.py