Function cargo_edit::get_latest_dependency

pub fn get_latest_dependency(
    crate_name: &str,
    flag_allow_prerelease: bool,
    rust_version: Option<RustVersion>,
    index: &mut AnyIndexCache,
) -> CargoResult<Dependency>

Query latest version from a registry index

The registry argument must be specified for crates from alternative registries.

The latest version will be returned as a Dependency. This will fail, when

• there is no Internet connection and offline is false.
• summaries in registry index with an incorrect format.
• a crate with the given name does not exist on the registry.