Trait PackageRegistry 

pub trait PackageRegistry {
    type Error: StdError + Send + Sync + 'static;

    // Required method
    async fn package_exists(
        &self,
        package: &str,
        version: &str,
    ) -> Result<bool, Self::Error>;

    // Provided method
    fn base_url(&self) -> Option<&Url> { ... }
}

Remote services whose existence checks make retries safe.

Required Associated Types

type Error: StdError + Send + Sync + 'static

The failure of a registry lookup.

Required Methods

async fn package_exists( &self, package: &str, version: &str, ) -> Result<bool, Self::Error>

Whether version of package is already in the registry.

Provided Methods

fn base_url(&self) -> Option<&Url>

The registry base URL with a trailing slash, when the registry has one that packages can be published to.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T: PackageRegistry + ?Sized> PackageRegistry for &T

type Error = <T as PackageRegistry>::Error

async fn package_exists( &self, package: &str, version: &str, ) -> Result<bool, Self::Error>

fn base_url(&self) -> Option<&Url>

Implementors

impl PackageRegistry for CargoRegistry

type Error = RegistryError

impl PackageRegistry for NpmRegistry

type Error = RegistryError