# frozen_string_literal: true
require_relative "spec_group"
module Bundler
class Resolver
#
# This class is a PubGrub compatible "Version" class that takes Bundler
# resolution complexities into account.
#
# Each Resolver::Candidate has a underlying `Gem::Version` plus a set of
# platforms. For example, 1.1.0-x86_64-linux is a different resolution candidate
# from 1.1.0 (generic). This is because different platform variants of the
# same gem version can bring different dependencies, so they need to be
# considered separately.
#
# Some candidates may also keep some information explicitly about the
# package they refer to. These candidates are referred to as "canonical" and
# are used when materializing resolution results back into RubyGems
# specifications that can be installed, written to lockfiles, and so on.
#
class Candidate
include Comparable
attr_reader :version
def initialize(version, group: nil, priority: -1)
@spec_group = group || SpecGroup.new([])
@version = Gem::Version.new(version)
@priority = priority
end
def dependencies
@spec_group.dependencies
end
def to_specs(package, most_specific_locked_platform)
return [] if package.meta?
@spec_group.to_specs(package.force_ruby_platform?, most_specific_locked_platform)
end
def prerelease?
@version.prerelease?
end
def segments
@version.segments
end
def <=>(other)
return unless other.is_a?(self.class)
version_comparison = version <=> other.version
return version_comparison unless version_comparison.zero?
priority <=> other.priority
end
def ==(other)
return unless other.is_a?(self.class)
version == other.version && priority == other.priority
end
def eql?(other)
return unless other.is_a?(self.class)
version.eql?(other.version) && priority.eql?(other.priority)
end
def hash
[@version, @priority].hash
end
def to_s
@version.to_s
end
protected
attr_reader :priority
end
end
end
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