diff options
Diffstat (limited to 'lib/rubygems/vendor/molinillo/lib/molinillo/state.rb')
-rw-r--r-- | lib/rubygems/vendor/molinillo/lib/molinillo/state.rb | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/rubygems/vendor/molinillo/lib/molinillo/state.rb b/lib/rubygems/vendor/molinillo/lib/molinillo/state.rb new file mode 100644 index 0000000000..c48ec6af9c --- /dev/null +++ b/lib/rubygems/vendor/molinillo/lib/molinillo/state.rb @@ -0,0 +1,58 @@ +# frozen_string_literal: true + +module Gem::Molinillo + # A state that a {Resolution} can be in + # @attr [String] name the name of the current requirement + # @attr [Array<Object>] requirements currently unsatisfied requirements + # @attr [DependencyGraph] activated the graph of activated dependencies + # @attr [Object] requirement the current requirement + # @attr [Object] possibilities the possibilities to satisfy the current requirement + # @attr [Integer] depth the depth of the resolution + # @attr [Hash] conflicts unresolved conflicts, indexed by dependency name + # @attr [Array<UnwindDetails>] unused_unwind_options unwinds for previous conflicts that weren't explored + ResolutionState = Struct.new( + :name, + :requirements, + :activated, + :requirement, + :possibilities, + :depth, + :conflicts, + :unused_unwind_options + ) + + class ResolutionState + # Returns an empty resolution state + # @return [ResolutionState] an empty state + def self.empty + new(nil, [], DependencyGraph.new, nil, nil, 0, {}, []) + end + end + + # A state that encapsulates a set of {#requirements} with an {Array} of + # possibilities + class DependencyState < ResolutionState + # Removes a possibility from `self` + # @return [PossibilityState] a state with a single possibility, + # the possibility that was removed from `self` + def pop_possibility_state + PossibilityState.new( + name, + requirements.dup, + activated, + requirement, + [possibilities.pop], + depth + 1, + conflicts.dup, + unused_unwind_options.dup + ).tap do |state| + state.activated.tag(state) + end + end + end + + # A state that encapsulates a single possibility to fulfill the given + # {#requirement} + class PossibilityState < ResolutionState + end +end |