Add convenient Configuration.build{...} method for constructing inl…

…ine.

lib/async/service/configuration.rb

@@ -13,6 +13,15 @@ module Service
 		#
 		# Environments are key-value maps with lazy value resolution. An environment can inherit from a parent environment, which can provide defaults
 		class Configuration
+			def self.build(root: Dir.pwd, &block)
+				configuration = self.new
+
+				loader = Loader.new(configuration, root)
+				loader.instance_eval(&block)
+
+				return configuration
+			end
+
 			def self.load(paths = ARGV)
 				configuration = self.new
 

test/async/service/configuration.rb

@@ -6,6 +6,20 @@
 require 'async/service/configuration'
 
 describe Async::Service::Configuration do
+	with '.build' do
+		it "can create a new configuration" do
+			configuration = subject.build do
+				service 'test' do
+					name 'value'
+				end
+			end
+
+			expect(configuration.environments).to have_attributes(
+				size: be == 1
+			)
+		end
+	end
+
 	with '.for' do
 		it "can create a new configuration" do
 			environment = Async::Service::Environment.new