Struct OverlayPackageSet 

pub struct OverlayPackageSet {
    pub base: Box<dyn PackageSet>,
    pub top: Box<dyn PackageSet>,
    pub label: String,
}

Fields

base: Box<dyn PackageSet>

top: Box<dyn PackageSet>

label: String

Implementations

impl OverlayPackageSet

pub fn new(base: Box<dyn PackageSet>, top: Box<dyn PackageSet>) -> Self

Trait Implementations

impl PackageSet for OverlayPackageSet

fn get(&self, name: &str) -> Result<PackageLookup, PackageSetError>

Retrieve the derivation for a named package. None if not present.

fn names(&self) -> Vec<String>

Short list of package names this set knows about. May be a finite enumeration (LispPackageSet) or a caller-provided seed (NixpkgsBridge doesn’t enumerate nixpkgs by default — too large).

fn label(&self) -> &str

Optional provenance label for logging / error messages.