Dpkg::Deps::KnownFacts - list of installed real and virtual packages

Version2.00(dpkg1.20.0) Remove method: $facts->check_package(). Version1.01(dpkg1.16.1) New option: $facts->add_installed_package() now accepts 2 supplementary parameters ($arch and $multiarch). Deprecated method: $facts->check_package() is obsolete, it should not have been part of the public API. Version1.00(dpkg1.15.6) Mark the module as public. 1.22.21 2025-07-14 Dpkg::Deps::KnownFacts(3perl)

This class represents a list of installed packages and a list of virtual packages provided (by the set of installed packages).

$facts = Dpkg::Deps::KnownFacts->new(); Creates a new object. $facts->add_installed_package($package, $version, $arch, $multiarch) Records that the given version of the package is installed. If $version/$arch is undefined we know that the package is installed but we don't know which version/architecture it is. $multiarch is the Multi-Arch field of the package. If $multiarch is undef, it will be equivalent to "Multi-Arch: no". Note that $multiarch is only used if $arch is provided. $facts->add_provided_package($virtual, $relation, $version, $by) Records that the "$by" package provides the $virtual package. $relation and $version correspond to the associated relation given in the Provides field (if present). $facts->evaluate_simple_dep() This method is private and should not be used except from within Dpkg::Deps.

Dpkg::Deps::KnownFacts - list of installed real and virtual packages