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Contents
module Kuby
module Docker
class LayerStack
include Enumerable
attr_reader :stack, :layers
def initialize
@stack = []
@layers = {}
end
def each
return to_enum(__method__) unless block_given?
@stack.each { |name| yield layers[name] }
end
def use(name, layer = nil, &block)
stack << name
if layer
layers[name] = layer
elsif block_given?
layers[name] = InlineLayer.new(block)
else
raise "Must either pass a layer object or a block to `#{__method__}'"
end
end
def insert(name, layer = nil, options = {}, &block)
# this is truly gross but it's the only way I can think of to be able
# to call insert these two ways:
#
# insert :foo, FooLayer.new, before: :bundler_phase
# insert :foo, before: :bundler_phase do
# ...
# end
if layer.is_a?(Hash)
insert(name, nil, options.merge(layer), &block)
return
end
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)
if layer
layers[name] = layer
elsif block_given?
layers[name] = InlineLayer.new(block)
else
raise "Must either pass a layer object or a block to `#{__method__}'"
end
end
def delete(name)
stack.delete(name)
layers.delete(name)
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems