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📛 NAME

Dpkg::Deps::Simple – represents a single dependency statement

🚀 Quick Reference

Use Case	Command	Description
Create a new dependency object	Dpkg::Deps::Simple->new([$dep[, %opts]])	Create a new dependency, optionally from a string or with options like host_arch, build_arch, build_dep, tests_dep
Parse a dependency string	$dep->parse_string($dep_string)	Parse a dependency string and set internal properties
Check if dependency implies another	$dep->implies($other_dep)	Returns 1 if true, 0 if false, undef if no implication
Simplify for architecture	$dep->reduce_arch($arch)	Trim dependency to only relevant architecture
Evaluate dependency against facts	$dep->get_evaluation($facts)	Evaluate truth given installed packages and virtual packages
Output dependency string	$dep->output([$fh]) or "$dep"	Return string representation, optionally print to filehandle

📖 DESCRIPTION

This class represents a single dependency statement. It has several interesting properties:

• 📦 package – The package name (can be undef if the dependency has not been initialized or if simplification led to removal).
• 🔗 relation – The relational operator: =, <<, <=, >= or >>. Can be undefined if no version restriction.
• 🔢 version – The version.
• 🏛️ arches – List of architectures where this dependency is applicable. Undefined when no restriction, otherwise an array ref. Can contain exclusion list (prefixed with !).
• 🔧 archqual – The arch qualifier (e.g., any in python:any (>= 2.6)). Can be undef.
• 📋 restrictions – The restrictions formula. Undefined when none, otherwise an array ref.

⚙️ METHODS

• $dep = Dpkg::Deps::Simple->new([$dep[, %opts]]) – Creates a new object. Options: host_arch, build_arch, build_dep (default 0), tests_dep (default 0).
• $dep->reset() – Clears any dependency information so that $dep->is_empty() returns true.
• $dep->parse_string($dep_string) – Parses the dependency string and modifies internal properties.
• $dep->parse($fh, $desc) – Parse a dependency line from a filehandle.
• $dep->load($filename) – Parse a dependency line from a file.
• $dep->output([$fh]) / "$dep" – Returns a string representing the dependency. If $fh is set, prints to filehandle.
• $dep->save($filename) – Save the dependency into a file.
• $dep->implies($other_dep) – Returns 1 when $dep implies $other_dep, 0 when implies NOT, undef when no implication.
• $dep->get_deps() – Returns a list of sub‑dependencies (for this object, returns itself).
• $dep->sort() – No‑op for this object.
• $dep->arch_is_concerned($arch) – True if dependency applies to the given architecture.
• $dep->reduce_arch($arch) – Simplifies dependency to contain only information relevant to the given architecture. May leave object empty.
• $dep->has_arch_restriction() – Returns the package name if dependency applies only to a subset of architectures.
• $dep->profile_is_concerned() – True if dependency applies to the given profile.
• $dep->reduce_profiles() – Simplifies dependency to contain only information relevant to the given profile. May leave object empty.
• $dep->get_evaluation($facts) – Evaluates dependency given a Dpkg::Deps::KnownFacts object. Returns 1 (true), 0 (false), undef (inconclusive).
• $dep->simplify_deps($facts, @assumed_deps) – Simplifies dependency as much as possible given facts and assumed true dependencies.
• $dep->is_empty() – True if dependency is empty / not yet initialized.
• $dep->merge_union($other_dep) – True if $dep could be modified to represent the union of both dependencies; otherwise false.

🆕 CHANGES

📅 Version 1.02 (dpkg 1.17.10)

• New methods: $dep->profile_is_concerned() and $dep->reduce_profiles().

📅 Version 1.01 (dpkg 1.16.1)

• New method: $dep->reset().
• New property: recognizes the arch qualifier any and stores it in the archqual property.

📅 Version 1.00 (dpkg 1.15.6)

• Mark the module as public.

📛 NAME 🚀 Quick Reference 📖 DESCRIPTION ⚙️ METHODS 🆕 CHANGES