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composed_set.rb

# frozen_string_literal: true
##
# A ComposedSet allows multiple sets to be queried like a single set.
#
# To create a composed set with any number of sets use:
#
#   Gem::Resolver.compose_sets set1, set2
#
# This method will eliminate nesting of composed sets.

class Gem::Resolver::ComposedSet < Gem::Resolver::Set

attr_reader :sets # :nodoc:

##
  # Creates a new ComposedSet containing +sets+.  Use
  # Gem::Resolver::compose_sets instead.

def initialize *sets
    super()

@sets = sets
  end

##
  # When +allow_prerelease+ is set to +true+ prereleases gems are allowed to
  # match dependencies.

def prerelease= allow_prerelease
    super

sets.each do |set|
      set.prerelease = allow_prerelease
    end
  end

##
  # Sets the remote network access for all composed sets.

def remote= remote
    super

@sets.each { |set| set.remote = remote }
  end

def errors
    @errors + @sets.map { |set| set.errors }.flatten
  end

##
  # Finds all specs matching +req+ in all sets.

def find_all req
    @sets.map do |s|
      s.find_all req
    end.flatten
  end

##
  # Prefetches +reqs+ in all sets.

def prefetch reqs
    @sets.each { |s| s.prefetch(reqs) }
  end

end

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