Sha256: 1ab702360d1d2bfe231a299b50ccf934bcf570dcbba6e0e8adae004e16b5927f
Contents?: true
Size: 1.83 KB
Versions: 25
Compression:
Stored size: 1.83 KB
Contents
require 'tsort'
module TwitterCldr
module Resources
class ImportResolver
include TSort
attr_reader :importers, :options
def initialize(importers = Resources.importer_classes_for_ruby_engine, options = {})
@importers = importers
@options = options
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|
dep = instances.find { |ins| ins.class == dep_class }
yield dep if dep
unless options[:allow_missing_dependencies]
raise "Could not find dependency #{dep_class.name}"
end
end
end
def check_unmet_deps
instances.each do |instance|
check_unmet_instance_deps(instance)
end
end
def check_unmet_instance_deps(instance)
return if options[:allow_missing_dependencies]
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
25 entries across 25 versions & 1 rubygems