class Gem::Molinillo::Resolver::Resolution::UnwindDetails

We compare UnwindDetails when choosing which state to unwind to. If two options have the same state_index we prefer the one most removed from a requirement that caused the conflict. Both options would unwind to the same state, but a ‘grandparent` option will filter out fewer of its possibilities after doing so - where a state is both a `parent` and a `grandparent` to requirements that have caused a conflict this is the correct behaviour. @param [UnwindDetail] other UnwindDetail to be compared @return [Integer] integer specifying ordering

# File rubygems/vendor/molinillo/lib/molinillo/resolution.rb, line 83
def <=>(other)
  if state_index > other.state_index
    1
  elsif state_index == other.state_index
    reversed_requirement_tree_index <=> other.reversed_requirement_tree_index
  else
    -1
  end
end

@return [Array] array of all the requirements that led to the need for

this unwind

# File rubygems/vendor/molinillo/lib/molinillo/resolution.rb, line 126
def all_requirements
  @all_requirements ||= requirement_trees.flatten(1)
end

@return [Integer] index of state requirement in reversed requirement tree

(the conflicting requirement itself will be at position 0)

# File rubygems/vendor/molinillo/lib/molinillo/resolution.rb, line 95
def reversed_requirement_tree_index
  @reversed_requirement_tree_index ||=
    if state_requirement
      requirement_tree.reverse.index(state_requirement)
    else
      999_999
    end
end

@return [Array] array of sub-dependencies to avoid when choosing a

new possibility for the state we've unwound to. Only relevant for
non-primary unwinds

# File rubygems/vendor/molinillo/lib/molinillo/resolution.rb, line 116
def sub_dependencies_to_avoid
  @requirements_to_avoid ||=
    requirement_trees.map do |tree|
      index = tree.index(state_requirement)
      tree[index + 1] if index
    end.compact
end

@return [Boolean] where the requirement of the state we’re unwinding

to directly caused the conflict. Note: in this case, it is
impossible for the state we're unwinding to be a parent of
any of the other conflicting requirements (or we would have
circularity)

# File rubygems/vendor/molinillo/lib/molinillo/resolution.rb, line 109
def unwinding_to_primary_requirement?
  requirement_tree.last == state_requirement
end