cargo-llvm-cov

Cargo subcommand for precise LLVM source-based code coverage in Rust projects.

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A Cargo subcommand that produces LLVM source-based code coverage for Rust projects by wrapping rustc's instrument-coverage flag to emit line, region, and optional branch data and working with cargo test, cargo run, and cargo nextest. It addresses the manual configuration of rustc flags and toolchains required for accurate coverage (including proc-macros and UI tests) and is aimed at Rust developers and teams enforcing coverage in local or self-hosted CI; it is open-source under Apache-2.0.

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