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Dpkg::Deps::KnownFacts(3perl) libdpkg-perl Dpkg::Deps::KnownFacts(3perl)

📖 NAME

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

🚀 Quick Reference

Use Case	Command	Description
Create a new KnownFacts object	$facts = Dpkg::Deps::KnownFacts->new();	Creates a new object to track installed/provided packages
Add an installed package	$facts->add_installed_package($package, $version, $arch, $multiarch);	Record that a specific version/architecture is installed
Add a provided virtual package	$facts->add_provided_package($virtual, $relation, $version, $by);	Record that a package provides a virtual package
Evaluate simple dependency	$facts->evaluate_simple_dep();	Private method used internally by Dpkg::Deps

📝 DESCRIPTION

This class 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).

• $facts->evaluate_simple_dep()

  This method is private and should not be used except from within Dpkg::Deps.

📜 CHANGES

🔖 Version 2.00 (dpkg 1.20.0)

• Remove method: $facts->check_package().

🔖 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check_package() is obsolete, it should not have been part of the public API.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.

1.21.1 2025-09-09 Dpkg::Deps::KnownFacts(3perl)

📖 NAME 🚀 Quick Reference 📝 DESCRIPTION 🛠️ METHODS 📜 CHANGES