class Gem::Resolver::Molinillo::DependencyGraph::Log

A log for dependency graph actions

Public Class Methods

new() click to toggle source

Initializes an empty log

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 14
def initialize
  @current_action = @first_action = nil
end

Public Instance Methods

add_edge_no_circular(graph, origin, destination, requirement) click to toggle source

@macro action

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 40
def add_edge_no_circular(graph, origin, destination, requirement)
  push_action(graph, AddEdgeNoCircular.new(origin, destination, requirement))
end

add_vertex(graph, name, payload, root) click to toggle source

@macro action

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 30
def add_vertex(graph, name, payload, root)
  push_action(graph, AddVertex.new(name, payload, root))
end

delete_edge(graph, origin_name, destination_name, requirement) click to toggle source

{include:DependencyGraph#delete_edge} @param [Graph] graph the graph to perform the action on @param [String] origin_name @param [String] destination_name @param [Object] requirement @return (see DependencyGraph#delete_edge)

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 50
def delete_edge(graph, origin_name, destination_name, requirement)
  push_action(graph, DeleteEdge.new(origin_name, destination_name, requirement))
end

detach_vertex_named(graph, name) click to toggle source

@macro action

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 35
def detach_vertex_named(graph, name)
  push_action(graph, DetachVertexNamed.new(name))
end

each() { |action| ... } click to toggle source

@!visibility private Enumerates each action in the log @yield [Action]

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 76
def each
  return enum_for unless block_given?
  action = @first_action
  loop do
    break unless action
    yield action
    action = action.next
  end
  self
end

pop!(graph) click to toggle source

Pops the most recent action from the log and undoes the action @param [DependencyGraph] graph @return [Action] the action that was popped off the log

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 62
def pop!(graph)
  return unless action = @current_action
  unless @current_action = action.previous
    @first_action = nil
  end
  action.down(graph)
  action
end

reverse_each() { |action| ... } click to toggle source

@!visibility private Enumerates each action in the log in reverse order @yield [Action]

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 90
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

rewind_to(graph, tag) click to toggle source

@macro action

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 102
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

set_payload(graph, name, payload) click to toggle source

@macro action

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 55
def set_payload(graph, name, payload)
  push_action(graph, SetPayload.new(name, payload))
end

tag(graph, tag) click to toggle source

@macro action

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 25
def tag(graph, tag)
  push_action(graph, Tag.new(tag))
end

Private Instance Methods

push_action(graph, action) click to toggle source

Adds the given action to the log, running the action @param [DependencyGraph] graph @param [Action] action @return The value returned by `action.up`

# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/log.rb, line 116
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