zerus

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Lightweight tool for creating project-specific and/or general offline crates.io mirrors

Build zerus

Either build from published source in crates.io.

$ cargo install zerus --locked

Or download from github releases.

Usage

Download crates

Use zerus mirror to download .crate files for your project's dependencies.

$ zerus mirror new-mirror ../deku/Cargo.toml ../adsb_deku/Cargo.toml

Mirror individual crates by name (resolves to the latest version) or pinned to a specific version. When --crate is used, --get-feature-gated is implied.

$ zerus mirror new-mirror --crate reqwest --crate serde@1.0.210

Use --get-feature-gated to recursively expand and download all transitive dependencies, regardless of which features are currently enabled. This is useful when building a more complete mirror rather than one tailored to a specific project's current feature set — ensuring crates are available even if features change later.

[!NOTE] The expansion (run by --get-feature-gated and implied by --crate) includes dev and build dependencies of every crate it visits and ignores feature gating, so the result is far larger than what would resolve — even a tiny crate like expands to thousands of crates. To mirror only a project's resolved dependencies, pass its instead of using .