Music Hoard

Code Coverage

Pre-requisites

rustup component add llvm-tools-preview
cargo install grcov

Generating Code Coverage

env CARGO_TARGET_DIR=codecov \
    cargo clean
env RUSTFLAGS="-C instrument-coverage" \
    LLVM_PROFILE_FILE="codecov/debug/profraw/musichoard-%p-%m.profraw" \
    CARGO_TARGET_DIR=codecov \
    cargo test
grcov codecov/debug/profraw \
      --binary-path ./codecov/debug/ \
      --output-types html \
      --source-dir . \
      --ignore-not-existing \
      --ignore "tests/*" \
      --ignore "src/main.rs" \
      --excl-start "mod tests \{|GRCOV_EXCL_START" \
      --excl-stop "GRCOV_EXCL_STOP" \
      --output-path ./codecov/debug/coverage/
xdg-open codecov/debug/coverage/index.html

Note that some changes may not be visible until codecov/debug/coverage is removed and the grcov command is rerun.

For most cases cargo clean can be replaced with rm -rf ./codecov/debug/{coverage,profraw}.