focal (3) Dpkg::Deps::KnownFacts.3perl.gz

NAME

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

DESCRIPTION

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

METHODS

       $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).

       ($check, $param) = $facts->check_package($package)
           $check is one when the package is found. For a real package, $param contains the version. For a
           virtual package, $param contains an array reference containing the list of packages that provide it
           (each package is listed as [ $provider, $relation, $version ]).

           This function is obsolete and should not be used. Dpkg::Deps::KnownFacts is only meant to be filled
           with data and then passed to Dpkg::Deps methods where appropriate, but it should not be directly
           queried.

       $facts->evaluate_simple_dep()
           This method is private and should not be used except from within Dpkg::Deps.

CHANGES

   Version 1.01 (dpkg 1.16.1)
       New option: Dpkg::Deps::KnownFacts->add_installed_package() now accepts 2 supplementary parameters ($arch
       and $multiarch).

       Deprecated method: Dpkg::Deps::KnownFacts->check_package() is obsolete, it should not have been part of
       the public API.

   Version 1.00 (dpkg 1.15.6)
       Mark the module as public.