Class: Construi::IntermediateImage

Inherits:
Object
  • Object
show all
Defined in:
lib/construi/image.rb

Overview

An image that represents an intermediatae state of an image. Useful for performing operations where each opertion is performed on the result of the last.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(image) ⇒ IntermediateImage

Returns a new instance of IntermediateImage.



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# File 'lib/construi/image.rb', line 119

def initialize(image)
  @image = image
  @first = true
end

Instance Attribute Details

#image ⇒ Object (readonly)

Returns the value of attribute image.



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# File 'lib/construi/image.rb', line 117

def image
  @image
end

Class Method Details

.seed(image) ⇒ Object 



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# File 'lib/construi/image.rb', line 149

def self.seed(image)
  new image
end

Instance Method Details

#delete ⇒ Object 



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# File 'lib/construi/image.rb', line 145

def delete
  @image.delete unless @image.tagged?
end

#map ⇒ Object 



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# File 'lib/construi/image.rb', line 128

def map
  update(yield @image)
end

#reduce(iter) ⇒ Object 



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# File 'lib/construi/image.rb', line 132

def reduce(iter)
  iter.reduce(self) do |intermediate_image, item|
    intermediate_image.map { |i| yield i, item }
  end
end

#run(cmd, options = {}) ⇒ Object 



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# File 'lib/construi/image.rb', line 124

def run(cmd, options = {})
  map { |i| i.run cmd, options }
end

#update(image) ⇒ Object 



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# File 'lib/construi/image.rb', line 138

def update(image)
  delete unless @first
  @first = false
  @image = image
  self
end