Class: Kuby::Docker::LayerStack

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/kuby/docker/layer_stack.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LayerStack

Returns a new instance of LayerStack.



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# File 'lib/kuby/docker/layer_stack.rb', line 8

def initialize
  @stack = []
  @layers = {}
end

Instance Attribute Details

#layers ⇒ Object (readonly)

Returns the value of attribute layers.



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# File 'lib/kuby/docker/layer_stack.rb', line 6

def layers
  @layers
end

#stack ⇒ Object (readonly)

Returns the value of attribute stack.



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# File 'lib/kuby/docker/layer_stack.rb', line 6

def stack
  @stack
end

Instance Method Details

#delete(name) ⇒ Object 



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# File 'lib/kuby/docker/layer_stack.rb', line 36

def delete(name)
  stack.delete(name)
  layers.delete(name)
end

#each ⇒ Object 



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# File 'lib/kuby/docker/layer_stack.rb', line 13

def each
  return to_enum(__method__) unless block_given?
  @stack.each { |name| yield layers[name] }
end

#insert(name, layer, options = {}) ⇒ Object 



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# File 'lib/kuby/docker/layer_stack.rb', line 23

def insert(name, layer, options = {})
  existing_name = options[:before] || options[:after]
  idx = stack.index(existing_name)

  unless idx
    raise ArgumentError, "Could not find existing layer '#{existing_name}'"
  end

  idx += 1 if options[:after]
  stack.insert(idx, name)
  layers[name] = layer
end

#use(name, layer) ⇒ Object 



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# File 'lib/kuby/docker/layer_stack.rb', line 18

def use(name, layer)
  stack << name
  layers[name] = layer
end