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.\" ========================================================================
.\"
.IX Title "Dpkg::Deps::KnownFacts 3perl"
.TH Dpkg::Deps::KnownFacts 3perl "2023-05-11" "1.21.22" "libdpkg-perl"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Dpkg::Deps::KnownFacts \- list of installed real and virtual packages
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This class represents a list of installed packages and a list of virtual
packages provided (by the set of installed packages).
.SH "METHODS"
.IX Header "METHODS"
.ie n .IP "$facts = Dpkg::Deps::KnownFacts\->\fBnew()\fR;" 4
.el .IP "\f(CW$facts\fR = Dpkg::Deps::KnownFacts\->\fBnew()\fR;" 4
.IX Item "$facts = Dpkg::Deps::KnownFacts->new();"
Creates a new object.
.ie n .IP "$facts\->add_installed_package($package, $version, $arch, $multiarch)" 4
.el .IP "\f(CW$facts\fR\->add_installed_package($package, \f(CW$version\fR, \f(CW$arch\fR, \f(CW$multiarch\fR)" 4
.IX Item "$facts->add_installed_package($package, $version, $arch, $multiarch)"
Records that the given version of the package is installed. If
\&\f(CW$version\fR/$arch is undefined we know that the package is installed but we
don't know which version/architecture it is. \f(CW$multiarch\fR is the Multi-Arch
field of the package. If \f(CW$multiarch\fR is undef, it will be equivalent to
\&\*(L"Multi-Arch: no\*(R".
.Sp
Note that \f(CW$multiarch\fR is only used if \f(CW$arch\fR is provided.
.ie n .IP "$facts\->add_provided_package($virtual, $relation, $version, $by)" 4
.el .IP "\f(CW$facts\fR\->add_provided_package($virtual, \f(CW$relation\fR, \f(CW$version\fR, \f(CW$by\fR)" 4
.IX Item "$facts->add_provided_package($virtual, $relation, $version, $by)"
Records that the \*(L"$by\*(R" package provides the \f(CW$virtual\fR package. \f(CW$relation\fR
and \f(CW$version\fR correspond to the associated relation given in the Provides
field (if present).
.ie n .IP "$facts\->\fBevaluate_simple_dep()\fR" 4
.el .IP "\f(CW$facts\fR\->\fBevaluate_simple_dep()\fR" 4
.IX Item "$facts->evaluate_simple_dep()"
This method is private and should not be used except from within Dpkg::Deps.
.SH "CHANGES"
.IX Header "CHANGES"
.SS "Version 2.00 (dpkg 1.20.0)"
.IX Subsection "Version 2.00 (dpkg 1.20.0)"
Remove method: \f(CW$facts\fR\->\fBcheck_package()\fR.
.SS "Version 1.01 (dpkg 1.16.1)"
.IX Subsection "Version 1.01 (dpkg 1.16.1)"
New option: Dpkg::Deps::KnownFacts\->\fBadd_installed_package()\fR now accepts 2
supplementary parameters ($arch and \f(CW$multiarch\fR).
.PP
Deprecated method: Dpkg::Deps::KnownFacts\->\fBcheck_package()\fR is obsolete,
it should not have been part of the public \s-1API.\s0
.SS "Version 1.00 (dpkg 1.15.6)"
.IX Subsection "Version 1.00 (dpkg 1.15.6)"
Mark the module as public.