taiki-e/cargo-llvm-cov

Health v2 · maintenance only

Adoption not part of the score

1453 stars · 95 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

cargo-llvm-cov is a Cargo subcommand that wraps rustc's -C instrument-coverage to generate precise LLVM source-based code coverage reports for Rust projects. It supports cargo test, cargo run, and cargo nextest, with output formats suitable for CI services like Codecov.

Use cases

• generate code coverage reports for rust tests
• measure line and branch coverage in a rust crate
• upload rust coverage to codecov in ci
• get coverage for doc tests and proc-macro ui tests
• merge coverage from tests run under different conditions
• exclude files or code from coverage reports

When to choose

• you need accurate source-based coverage for a rust project
• you want fast coverage without extra instrumentation layers
• you need coverage in github actions, gitlab ci, or codecov
• you use nextest or need doc test coverage

When to avoid

• you need coverage for non-rust projects
• you rely on tarpaulin-specific features or workflows
• you need branch coverage on stable rust (requires nightly)

Facets

cli-tool · maturity stable

testing cli developer-tools testing developer-tools rust cli cross-platform code-coverage cargo-subcommand llvm rust codecov command-line

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