Sha256: c55758db6313146167c20e357d818c2fdab39fbf85a38e3a04b4ba8148b880bd
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Size: 1.57 KB
Versions: 15
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Stored size: 1.57 KB
Contents
require 'tsort'
module TwitterCldr
module Resources
class ImportResolver
include TSort
attr_reader :importers
def initialize(importers = Resources.importer_classes_for_ruby_engine)
@importers = importers
end
def import
check_unmet_deps
import_in_order
end
private
def import_in_order
tsort.each { |instance| instance.import }
end
def tsort_each_node(&block)
instances.each(&block)
end
def tsort_each_child(instance, &block)
deps_for(instance).map do |dep_class|
yield instances.find { |ins| ins.class == dep_class }
end
end
def check_unmet_deps
instances.each do |instance|
check_unmet_instance_deps(instance)
end
end
def check_unmet_instance_deps(instance)
unmet_deps = unmet_deps_for(instance)
unless unmet_deps.empty?
list = unmet_deps.map { |d| d.name }.join(', ')
raise "#{instance.class} dependencies are not met: #{list}"
end
end
def instances
@instances ||= importers.map do |importer|
importer.is_a?(Class) ? importer.new : importer
end
end
def unmet_deps_for(instance)
deps_for(instance).reject do |dep_class|
instances.any? { |ins| ins.class == dep_class }
end
end
def deps_for(instance)
if dep_requirement = instance.requirements[:dependency]
dep_requirement.importer_classes
else
[]
end
end
end
end
end
Version data entries
15 entries across 15 versions & 2 rubygems