cargo-unused-workspace-deps

Check for Unused Workspace Dependencies

Rust lets you list dependencies common to multiple crates in a workspace in the workspace-level Cargo.toml file, and then each crate can include them via including <dep>.workspace = true in the crate-level Cargo.toml file.

In large projects, it's easy to remove the last use of a dependency from a crate without noticing, and thus accumulate unused dependencies in that list. Enter cargo-unused-workspace-dependencies! This tool can check for any dependencies which aren't in use and, optionally, remove them from the workspace.