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 125

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 123

def image
  @image
end

Class Method Details

.seed(image) ⇒ Object 



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# File 'lib/construi/image.rb', line 155

def self.seed(image)
  new image
end

Instance Method Details

#delete ⇒ Object 



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# File 'lib/construi/image.rb', line 151

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

#map ⇒ Object 



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# File 'lib/construi/image.rb', line 134

def map
  update(yield @image)
end

#reduce(iter) ⇒ Object 



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

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 130

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

#update(image) ⇒ Object 



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# File 'lib/construi/image.rb', line 144

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