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# frozen_string_literal: true
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module Bundler
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class Resolver
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class Strategy
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def initialize(source)
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@source = source
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@package_priority_cache = {}
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end
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def next_package_and_version(unsatisfied)
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package, range = next_term_to_try_from(unsatisfied)
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[package, most_preferred_version_of(package, range).first]
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end
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private
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def next_term_to_try_from(unsatisfied)
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unsatisfied.min_by do |package, range|
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@package_priority_cache[[package, range]] ||= begin
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matching_versions = @source.versions_for(package, range)
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higher_versions = @source.versions_for(package, range.upper_invert)
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[matching_versions.count <= 1 ? 0 : 1, higher_versions.count]
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end
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end
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end
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def most_preferred_version_of(package, range)
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versions = @source.versions_for(package, range)
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# Conditional avoids (among other things) calling
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# sort_versions_by_preferred with the root package
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if versions.size > 1
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@source.sort_versions_by_preferred(package, versions)
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else
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versions
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end
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end
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end
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end
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end
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