class Bundler::Definition

def converge_sources
  changes = false
  # Get the Rubygems source from the Gemfile.lock
  locked_gem = @locked_sources.find { |s| s.kind_of?(Source::Rubygems) }
  # Get the Rubygems source from the Gemfile
  actual_gem = @sources.find { |s| s.kind_of?(Source::Rubygems) }
  # If there is a Rubygems source in both
  if locked_gem && actual_gem
    # Merge the remotes from the Gemfile into the Gemfile.lock
    changes = changes | locked_gem.replace_remotes(actual_gem)
  end
  # Replace the sources from the Gemfile with the sources from the Gemfile.lock,
  # if they exist in the Gemfile.lock and are `==`. If you can't find an equivalent
  # source in the Gemfile.lock, use the one from the Gemfile.
  @sources.map! do |source|
    @locked_sources.find { |s| s == source } || source
  end
  changes = changes | (Set.new(@sources) != Set.new(@locked_sources))
  @sources.each do |source|
    # If the source is unlockable and the current command allows an unlock of
    # the source (for example, you are doing a `bundle update <foo>` of a git-pinned
    # gem), unlock it. For git sources, this means to unlock the revision, which
    # will cause the `ref` used to be the most recent for the branch (or master) if
    # an explicit `ref` is not used.
    if source.respond_to?(:unlock!) && @unlock[:sources].include?(source.name)
      source.unlock!
      changes = true
    end
  end
  changes
end