cargo-udeps
Find unused dependencies in Cargo.toml.
While compilation of this tool also works on Rust stable, it needs Rust nightly to actually run.
Installation
GitHub Releases
https://github.com/est31/cargo-udeps/releases
cargo install (crates.io)
cargo install cargo-udeps --locked
cargo install (master)
cargo install --git https://github.com/est31/cargo-udeps --locked
Dedicated packages
Some package managers have packaged cargo-udeps:
- Nix/Nix OS:
cargo-udeps - Arch Linux:
pacman -S cargo-udeps - Homebrew:
brew install cargo-udeps
Usage
cargo +nightly udeps
It either prints out a "unused crates" line listing the crates, or it prints out a line saying that no crates were unused.
Ignoring some of the dependencies
To ignore some of the dependencies, add package.metadata.cargo-udeps.ignore to Cargo.toml.
[package.metadata.cargo-udeps.ignore]
normal = ["if_chain"]
#development = []
#build = []
[dependencies]
if_chain = "1.0.0" # Used only in doc-tests, which `cargo-udeps` cannot check.Known bugs
-
Some unused crates might not be detected. This includes crates used by std and its dependencies as well as crates that are already being used by dependencies of the studied crate.
-
Crates are currently only handled on a per name basis. Two crates with the same name but different versions would be a problem.
Trophy case
This is a list of cases where unused dependencies were found using cargo-udeps. You are welcome to expand it:
- nushell/nushell#519
- servo/pathfinder#236
- https://github.com/oconnor663/shared_child.rs/commit/5929637f5cf1bebc5d608b4d98fd5c8a10626712
- https://github.com/oconnor663/bao/commit/d216ee7c04e3587925dee68cce0b2a1ba44bc1d2
- https://github.com/dabreegster/abstreet/commit/03b685673bebbc95e2bcbd7c85358547bcffe8c3
- rust-lang/crater#446
- https://github.com/kodegenix/kg-tree/commit/0270ec495887cf0ff7580155db4ff12664614ee8
- https://github.com/opereon/opereon/commit/4d29cf174c0b178c1484f698ceb0e654f95a78d0
- https://github.com/djg/audioipc-2/commit/de0fc58cf1e87079027fce06b50eeffa6ae23d54
- casey/just#587
- Garvys/rustfst#76
- yewstack/yew_router#252
- rust-bitcoin/rust-bitcoincore-rpc#169
- hendrikmaus/helm-templexer#85
- https://github.com/itchysats/itchysats/commit/99076ecb907b3bfc5f31ffcdad9716df1869c8f7
Contributing
See CONTRIBUTING.md for details.
License
This tool is distributed under the terms of both the MIT license and the Apache License (Version 2.0), at your option.
See LICENSE for details.
License of your contributions
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.