# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 15
def initialize
  @current_action = @first_action = nil
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 41
def add_edge_no_circular(graph, origin, destination, requirement)
  push_action(graph, AddEdgeNoCircular.new(origin, destination, requirement))
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 31
def add_vertex(graph, name, payload, root)
  push_action(graph, AddVertex.new(name, payload, root))
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 51
def delete_edge(graph, origin_name, destination_name, requirement)
  push_action(graph, DeleteEdge.new(origin_name, destination_name, requirement))
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 36
def detach_vertex_named(graph, name)
  push_action(graph, DetachVertexNamed.new(name))
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 77
def each
  return enum_for unless block_given?
  action = @first_action
  loop do
    break unless action
    yield action
    action = action.next
  end
  self
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 63
def pop!(graph)
  return unless action = @current_action
  unless @current_action = action.previous
    @first_action = nil
  end
  action.down(graph)
  action
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 91
def reverse_each
  return enum_for(:reverse_each) unless block_given?
  action = @current_action
  loop do
    break unless action
    yield action
    action = action.previous
  end
  self
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 103
def rewind_to(graph, tag)
  loop do
    action = pop!(graph)
    raise "No tag #{tag.inspect} found" unless action
    break if action.class.action_name == :tag && action.tag == tag
  end
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 56
def set_payload(graph, name, payload)
  push_action(graph, SetPayload.new(name, payload))
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 26
def tag(graph, tag)
  push_action(graph, Tag.new(tag))
end

# File lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/log.rb, line 117
def push_action(graph, action)
  action.previous = @current_action
  @current_action.next = action if @current_action
  @current_action = action
  @first_action ||= action
  action.up(graph)
end