ci.yml

name: CI

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

env:
  CARGO_TERM_COLOR: always
  RUST_BACKTRACE: 1

permissions:
  contents: read

jobs:
  test:
    name: Test (${{ matrix.name }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: "default features"
            os: ubuntu-latest
            features: ""
          - name: "openblas"
            os: ubuntu-latest
            features: "--features openblas"
          - name: "accelerate"
            os: macos-latest
            features: "--features accelerate"
    steps:
      - uses: actions/checkout@v7

      - name: Install OpenBLAS
        if: matrix.name == 'openblas'
        run: sudo apt-get update && sudo apt-get install -y libopenblas-dev pkg-config

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

      - name: Cache cargo registry and build
        uses: actions/cache@v6
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-${{ matrix.name }}-${{ hashFiles('**/Cargo.lock', '**/Cargo.toml') }}
          restore-keys: |
            ${{ runner.os }}-cargo-${{ matrix.name }}-

      - name: Run tests (${{ matrix.name }})
        run: cargo test ${{ matrix.features }} --verbose

  clippy:
    name: Clippy
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

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

      - name: Cache cargo registry and build
        uses: actions/cache@v6
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-clippy-${{ hashFiles('**/Cargo.lock', '**/Cargo.toml') }}
          restore-keys: |
            ${{ runner.os }}-cargo-clippy-

      - name: Run Clippy (default features)
        run: cargo clippy -- -D warnings

      - name: Run Clippy (openblas backend)
        run: cargo clippy --features openblas -- -D warnings

  fmt:
    name: Format
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

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

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

  docs:
    name: Documentation
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

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

      - name: Cache cargo registry and build
        uses: actions/cache@v6
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-docs-${{ hashFiles('**/Cargo.lock', '**/Cargo.toml') }}
          restore-keys: |
            ${{ runner.os }}-cargo-docs-

      - name: Check documentation
        env:
          RUSTDOCFLAGS: -D warnings
        run: cargo doc --no-deps

  msrv:
    name: Minimum Supported Rust Version
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - name: Install Rust toolchain (MSRV)
        uses: dtolnay/rust-toolchain@1.89

      - name: Cache cargo registry and build
        uses: actions/cache@v6
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-msrv-${{ hashFiles('**/Cargo.lock', '**/Cargo.toml') }}
          restore-keys: |
            ${{ runner.os }}-cargo-msrv-

      - name: Check MSRV compatibility
        run: cargo check

  coverage:
    name: Code Coverage
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

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

      - name: Install cargo-llvm-cov
        uses: taiki-e/install-action@cargo-llvm-cov

      - name: Cache cargo registry and build
        uses: actions/cache@v6
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-cov-${{ hashFiles('**/Cargo.lock', '**/Cargo.toml') }}
          restore-keys: |
            ${{ runner.os }}-cargo-cov-

      - name: Generate coverage report
        run: cargo llvm-cov --lcov --output-path lcov.info

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v7
        with:
          files: lcov.info
          fail_ci_if_error: true
          token: ${{ secrets.CODECOV_TOKEN }}
          slug: paradedb/superkmeans-rs

      - name: Generate coverage summary
        run: |
          # Run coverage and capture the human-readable table.
          COVERAGE_OUTPUT=$(cargo llvm-cov 2>&1)

          # The TOTAL row lists percentages as: Regions Functions Lines (Branches).
          TOTAL_LINE=$(echo "$COVERAGE_OUTPUT" | grep "^TOTAL")
          REGION_COV=$(echo "$TOTAL_LINE" | grep -oE '[0-9]+\.[0-9]+%' | head -1)
          FUNC_COV=$(echo "$TOTAL_LINE" | grep -oE '[0-9]+\.[0-9]+%' | head -2 | tail -1)
          LINE_COV=$(echo "$TOTAL_LINE" | grep -oE '[0-9]+\.[0-9]+%' | head -3 | tail -1)

          echo "## 📊 Code Coverage Summary" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "| Metric | Coverage |" >> $GITHUB_STEP_SUMMARY
          echo "|--------|----------|" >> $GITHUB_STEP_SUMMARY
          echo "| **Lines** | $LINE_COV |" >> $GITHUB_STEP_SUMMARY
          echo "| **Functions** | $FUNC_COV |" >> $GITHUB_STEP_SUMMARY
          echo "| **Regions** | $REGION_COV |" >> $GITHUB_STEP_SUMMARY