A library to detect Conda virtual packages present on a system.
A virtual package represents a package that is injected into the solver to provide system information to packages. This allows packages to add dependencies on specific system features, like the platform version, the machines architecture, or the availability of a Cuda driver with a specific version.
This library provides both a low- and high level API to detect versions of virtual packages for the host system.
To detect all virtual packages for the host system use the [VirtualPackage::current] method
which will return a memoized slice of all detected virtual packages. The VirtualPackage enum
represents all available virtual package types. Using it provides some flexibility to the
user to not care about which exact virtual packages exist but still allows users to override
specific virtual package behavior. Say for instance you just want to detect the capabilities of
the host system but you still want to restrict the targeted linux version. You can convert an
instance of VirtualPackage to GenericVirtualPackage which erases any typing for specific
virtual packages.
Each virtual package is also represented by a struct which can be used to detect the specifics
of one virtual package. For instance the [Linux::current] method returns an instance of
Linux which contains the current Linux version. It also provides conversions to the higher
level API.
Finally at the core of the library are detection functions to perform specific capability
detections that are not tied to anything related to virtual packages. See
[cuda::detect_cuda_version_via_libcuda] as an example.