coverage.yml

---
name: Coverage

# yamllint disable-line rule:truthy
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

env:
  CARGO_TERM_COLOR: always
  RUSTFLAGS: "-C instrument-coverage"
  # yamllint disable-line rule:line-length
  RUSTDOCFLAGS: "-C instrument-coverage -Z unstable-options --persist-doctests target/debug/doctestbins"
  LLVM_PROFILE_FILE: "profile-%m.profraw"

jobs:
  coverage:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: dtolnay/rust-toolchain@nightly
        with:
          components: llvm-tools-preview
      - uses: Swatinem/rust-cache@v2
      - uses: ./.github/actions/install-linuxbrew
      - uses: ./.github/actions/install-sdl2
      - name: Install Coverage Tools
        run: |
          cargo install rustfilt cargo-binutils
          brew install jq
      - name: Run Tests
        run: cargo test --features "serde"
        # source: https://doc.rust-lang.org/rustc/instrument-coverage.html
      - name: Merge Coverage
        run: rust-profdata merge -sparse profile-*.profraw -o coverage.profdata
      - name: Collect Coverage
        run: |
          rust-cov export \
            $( \
              for file in \
                $( \
                  cargo test --features "serde" --no-run --message-format=json \
                    | jq -r "select(.profile.test == true) | .filenames[]" \
                    | grep -v dsym - \
                ) \
                target/debug/doctestbins/*/rust_out; \
              do \
                [[ -x $file ]] && printf "%s %s " -object "$file"; \
              done \
            ) \
            --format lcov \
            --Xdemangler=rustfilt \
            --ignore-filename-regex=/.cargo/registry \
            --ignore-filename-regex=/target/debug \
            --ignore-filename-regex=/tests \
            --instr-profile=coverage.profdata > coverage.txt
      - name: Upload Coverage
        uses: codecov/codecov-action@v3
        with:
          files: ./coverage.txt
          verbose: true
          fail_ci_if_error: true