cargo-llvm-cov

What cargo-llvm-cov is

cargo-llvm-cov is a Cargo subcommand that wraps rustc’s LLVM source-based coverage instrumentation. It generates line and region coverage reports and works with cargo test, cargo run and cargo nextest through a Cargo-compatible command-line interface. It supports proc-macro UI tests; doc-test coverage is optional and requires nightly features. Branch coverage is also optional and currently requires nightly Rust. Reports can be generated as text, HTML, JSON, LCOV, Cobertura XML or Codecov Custom Coverage format. The project provides CI examples for Codecov uploads with GitHub Actions and Cobertura output with GitLab CI, and LCOV reports can be displayed in VS Code using Coverage Gutters. With compatible Clang and LLVM tools configured, it can include coverage for C and C++ code linked to a Rust library or binary. The free, open-source project is available under either Apache-2.0 or MIT. It supports Linux, macOS and Windows. Installing it currently requires rustc 1.87 or newer; running it requires Cargo 1.60 or newer. Branch and doc-test coverage are unstable and have known limitations.