resolve

# File lib/bundler/definition.rb, line 245
    def resolve
      @resolve ||= begin
        last_resolve = converge_locked_specs
        resolve =
          if Bundler.frozen_bundle?
            Bundler.ui.debug "Frozen, using resolution from the lockfile"
            last_resolve
          elsif !unlocking? && nothing_changed?
            Bundler.ui.debug("Found no changes, using resolution from the lockfile")
            last_resolve
          else
            # Run a resolve against the locally available gems
            Bundler.ui.debug("Found changes from the lockfile, re-resolving dependencies because #{change_reason}")
            last_resolve.merge Resolver.resolve(expanded_dependencies, index, source_requirements, last_resolve, gem_version_promoter, additional_base_requirements_for_resolve, platforms)
          end

        # filter out gems that _can_ be installed on multiple platforms, but don't need
        # to be
        resolve.for(expand_dependencies(dependencies, true), [], false, false, false)
      end
    end