Crate krates[][src]

Expand description

Transforms the output of [cargo metadata] into a graph, Krates, where crates are nodes and dependency links are edges.

use krates::{Builder, Cmd, Krates, cm, petgraph};

fn main() -> Result<(), krates::Error> {
    let mut cmd = Cmd::new();
    // Enable all features, works for either an entire workspace or a single crate

    let mut builder = Builder::new();
    // Let's filter out any crates that aren't used by x86_64 windows
    builder.include_targets(std::iter::once(("x86_64-pc-windows-msvc", vec![])));

    let krates: Krates =, |pkg: cm::Package| {
        println!("Crate {} was filtered out",;

    // Print a dot graph of the entire crate graph
    println!("{:?}", petgraph::dot::Dot::new(krates.graph()));



pub use cargo_metadata as cm;
pub use cfg_expr;
pub use petgraph;
pub use semver;
pub use cm::camino;


A builder used to create a Krates graph, either by running a cargo metadata command, or using an already deserialized cargo_metadata::Metadata

An alternative to cargo_metadata::MetadataCommand which allows correct feature usage, as well as ensuring that the command can run successfully regardless of where it is executed and on what.

The default type used for edges in the crate graph.

A crate graph. Each unique crate is a node, and each unique dependency between 2 crates is an edge.

A node in the crate graph.

For when you just want to satisfy OnFilter without doing anything

A package specification. See cargo pkgid for more information on this.

A slice of a UTF-8 path (akin to str).

An owned, mutable UTF-8 path (akin to String).


The dependency kind. A crate can depend on the same crate multiple times with different dependency kinds

Errors that can occur when acquiring metadata to create a graph from

The scope for which a dependency kind will be ignored


A trait that can be applied to the type stored in the graph nodes to give additional features on Krates.

Trait used to report back any crates that are completely ignored in the final crate graph that is built. This occurs when the crate has no dependents any longer due to the applied filters.

Type Definitions

A crate’s unique identifier

A node identifier.