la-stack 0.4.1

Fast, stack-allocated linear algebra for fixed dimensions
Documentation 
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name: Codecov
concurrency:
  # Ensure only one Codecov analysis runs per branch/ref
  group: codecov-${{ github.ref_name }}
  cancel-in-progress: true

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

# Least-privilege permissions
permissions:
  contents: read
  checks: write
  pull-requests: write

jobs:
  coverage:
    name: Code Coverage
    runs-on: ubuntu-latest
    env:
      TARPAULIN_VERSION: "0.32.8"
    steps:
      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0 # Needed for Codecov diff analysis

      - name: Install Rust toolchain
        uses: actions-rust-lang/setup-rust-toolchain@2b1f5e9b395427c92ee4e3331786ca3c37afe2d7 # v1.16.0
        with:
          cache: true # toolchain/components are specified in rust-toolchain.toml

      - name: Cache tarpaulin
        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
        with:
          path: ~/.cargo/bin/cargo-tarpaulin
          key: tarpaulin-${{ runner.os }}-${{ env.TARPAULIN_VERSION }}
          restore-keys: |
            tarpaulin-${{ runner.os }}-

      - name: Install tarpaulin
        run: |
          if ! command -v cargo-tarpaulin &> /dev/null; then
            cargo install cargo-tarpaulin --locked --version "${TARPAULIN_VERSION}"
          fi

      - name: Install just
        uses: taiki-e/install-action@055f5df8c3f65ea01cd41e9dc855becd88953486 # v2.75.18
        with:
          tool: just

      - name: Run coverage
        run: |
          mkdir -p coverage
          chmod 755 coverage

          echo "::group::Running coverage"
          # Single source of truth: coverage configuration lives in justfile
          just coverage-ci
          echo "::endgroup::"

          echo "::group::Coverage verification"
          ls -la coverage/ || true

          if [ ! -f coverage/cobertura.xml ]; then
            echo "::error::coverage/cobertura.xml not found. Tarpaulin failed to generate XML output."
            exit 2
          fi
          echo "::notice::Coverage report generated successfully: $(wc -l < coverage/cobertura.xml) lines"
          echo "::endgroup::"
        env:
          RUST_BACKTRACE: 1

      - name: Upload coverage to Codecov
        if: ${{ success() && hashFiles('coverage/cobertura.xml') != '' }}
        uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6.0.0
        with:
          files: coverage/cobertura.xml
          flags: unittests
          name: codecov-umbrella
          fail_ci_if_error: false
        env:
          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

      - name: Archive coverage results
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: coverage-report
          path: coverage/