Modernize code.

.github/workflows/test-coverage.yaml

@@ -36,6 +36,8 @@ jobs:
 
     - uses: actions/upload-artifact@v4
       with:
+        include-hidden-files: true
+        if-no-files-found: error
         name: coverage-${{matrix.os}}-${{matrix.ruby}}
         path: .covered.db
 

.rubocop.yml

@@ -47,3 +47,7 @@ Layout/EmptyLinesAroundModuleBody:
 
 Style/FrozenStringLiteralComment:
   Enabled: true
+
+Style/StringLiterals:
+  Enabled: true
+  EnforcedStyle: double_quotes

async-container.gemspec

@@ -10,8 +10,8 @@ Gem::Specification.new do |spec|
 	spec.authors = ["Samuel Williams", "Olle Jonsson", "Anton Sozontov", "Juan Antonio Martín Lucas", "Yuji Yaginuma"]
 	spec.license = "MIT"
 
-	spec.cert_chain  = ['release.cert']
-	spec.signing_key = File.expand_path('~/.gem/release.pem')
+	spec.cert_chain  = ["release.cert"]
+	spec.signing_key = File.expand_path("~/.gem/release.pem")
 
 	spec.homepage = "https://github.com/socketry/async-container"
 
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
 		"source_code_uri" => "https://github.com/socketry/async-container.git",
 	}
 
-	spec.files = Dir.glob(['{lib}/**/*', '*.md'], File::FNM_DOTMATCH, base: __dir__)
+	spec.files = Dir.glob(["{lib}/**/*", "*.md"], File::FNM_DOTMATCH, base: __dir__)
 
 	spec.required_ruby_version = ">= 3.1"
 

config/sus.rb

@@ -3,7 +3,7 @@
 # Released under the MIT License.
 # Copyright, 2022, by Samuel Williams.
 
-require 'covered/sus'
+require "covered/sus"
 include Covered::Sus
 
-ENV['CONSOLE_LEVEL'] ||= 'fatal'
+ENV["CONSOLE_LEVEL"] ||= "fatal"

examples/benchmark/scalability.rb

@@ -6,8 +6,8 @@
 # gem install async-container
 gem "async-container"
 
-require 'async/clock'
-require_relative '../../lib/async/container'
+require "async/clock"
+require_relative "../../lib/async/container"
 
 def fibonacci(n)
 	if n < 2
@@ -17,7 +17,7 @@ def fibonacci(n)
 	end
 end
 
-require 'sqlite3'
+require "sqlite3"
 
 def work(*)
 	512.times do

examples/channel.rb

@@ -4,7 +4,7 @@
 # Copyright, 2020-2022, by Samuel Williams.
 # Copyright, 2020, by Olle Jonsson.
 
-require 'json'
+require "json"
 
 class Channel
 	def initialize

examples/container.rb

@@ -6,7 +6,7 @@
 # Copyright, 2019, by Yuji Yaginuma.
 # Copyright, 2022, by Anton Sozontov.
 
-require '../lib/async/container'
+require "../lib/async/container"
 
 Console.logger.debug!
 

examples/controller.rb

@@ -5,7 +5,7 @@
 # Copyright, 2022, by Anton Sozontov.
 # Copyright, 2024, by Samuel Williams.
 
-require '../lib/async/container/controller'
+require "../lib/async/container/controller"
 
 class Controller < Async::Container::Controller
 	def setup(container)

examples/fan-out/pipe.rb

@@ -4,7 +4,7 @@
 # Released under the MIT License.
 # Copyright, 2020-2024, by Samuel Williams.
 
-require 'async/container'
+require "async/container"
 
 container = Async::Container.new
 input, output = IO.pipe

examples/grace/server.rb

@@ -4,8 +4,8 @@
 # Released under the MIT License.
 # Copyright, 2024, by Samuel Williams.
 
-require '../../lib/async/container'
-require 'io/endpoint/host_endpoint'
+require "../../lib/async/container"
+require "io/endpoint/host_endpoint"
 
 Console.logger.debug!
 

examples/http/client.rb

@@ -4,9 +4,9 @@
 # Released under the MIT License.
 # Copyright, 2022-2024, by Samuel Williams.
 
-require 'async'
-require 'async/http/endpoint'
-require 'async/http/client'
+require "async"
+require "async/http/endpoint"
+require "async/http/client"
 
 endpoint = Async::HTTP::Endpoint.parse("http://localhost:9292")
 

examples/http/server.rb

@@ -4,10 +4,10 @@
 # Released under the MIT License.
 # Copyright, 2022-2024, by Samuel Williams.
 
-require 'async/container'
+require "async/container"
 
-require 'async/http/endpoint'
-require 'async/http/server'
+require "async/http/endpoint"
+require "async/http/server"
 
 container = Async::Container::Forked.new
 

examples/queue/server.rb

@@ -4,11 +4,11 @@
 # Released under the MIT License.
 # Copyright, 2020-2024, by Samuel Williams.
 
-require 'async'
-require 'async/container'
-require 'io/endpoint'
-require 'io/endpoint/unix_endpoint'
-require 'msgpack'
+require "async"
+require "async/container"
+require "io/endpoint"
+require "io/endpoint/unix_endpoint"
+require "msgpack"
 
 class Wrapper < MessagePack::Factory
 	def initialize
@@ -29,7 +29,7 @@ def initialize
 	end
 end
 
-endpoint = IO::Endpoint.unix('test.ipc')
+endpoint = IO::Endpoint.unix("test.ipc")
 bound_endpoint = endpoint.bound
 
 wrapper = Wrapper.new

examples/test.rb

@@ -3,9 +3,9 @@
 # Released under the MIT License.
 # Copyright, 2020-2022, by Samuel Williams.
 
-require_relative 'group'
-require_relative 'thread'
-require_relative 'process'
+require_relative "group"
+require_relative "thread"
+require_relative "process"
 
 group = Async::Container::Group.new
 

fixtures/async/container/a_container.rb

@@ -48,7 +48,7 @@ module Container
 				expect(input.read).to be == "true"
 			end
 
-			with '#sleep' do
+			with "#sleep" do
 				it "can sleep for a short time" do
 					container.spawn do
 						sleep(0.01)
@@ -63,8 +63,8 @@ module Container
 				end
 			end
 
-			with '#stop' do
-				it 'can stop the child process' do
+			with "#stop" do
+				it "can stop the child process" do
 					container.spawn do
 						sleep(1)
 					end
@@ -77,7 +77,7 @@ module Container
 				end
 			end
 
-			with '#ready' do
+			with "#ready" do
 				it "can notify the ready pipe in an asynchronous context" do
 					container.run do |instance|
 						Async do

gems.rb

@@ -3,7 +3,7 @@
 # Released under the MIT License.
 # Copyright, 2017-2024, by Samuel Williams.
 
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
 gemspec
 

gems/async-head.rb

@@ -3,8 +3,8 @@
 # Released under the MIT License.
 # Copyright, 2021-2024, by Samuel Williams.
 
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
 eval_gemfile "../gems.rb"
 
-gem 'async', git: "https://github.com/socketry/async"
+gem "async", git: "https://github.com/socketry/async"

gems/async-v1.rb

@@ -3,8 +3,8 @@
 # Released under the MIT License.
 # Copyright, 2021-2024, by Samuel Williams.
 
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
 eval_gemfile "../gems.rb"
 
-gem 'async', '~> 1.0'
+gem "async", "~> 1.0"

lib/async/container.rb

@@ -3,7 +3,7 @@
 # Released under the MIT License.
 # Copyright, 2017-2022, by Samuel Williams.
 
-require_relative 'container/controller'
+require_relative "container/controller"
 
 module Async
 	module Container

lib/async/container/best.rb

@@ -3,9 +3,9 @@
 # Released under the MIT License.
 # Copyright, 2019-2022, by Samuel Williams.
 
-require_relative 'forked'
-require_relative 'threaded'
-require_relative 'hybrid'
+require_relative "forked"
+require_relative "threaded"
+require_relative "hybrid"
 
 module Async
 	module Container

lib/async/container/channel.rb

@@ -3,7 +3,7 @@
 # Released under the MIT License.
 # Copyright, 2020-2022, by Samuel Williams.
 
-require 'json'
+require "json"
 
 module Async
 	module Container

lib/async/container/controller.rb

@@ -3,11 +3,11 @@
 # Released under the MIT License.
 # Copyright, 2018-2024, by Samuel Williams.
 
-require_relative 'error'
-require_relative 'best'
+require_relative "error"
+require_relative "best"
 
-require_relative 'statistics'
-require_relative 'notify'
+require_relative "statistics"
+require_relative "notify"
 
 module Async
 	module Container

lib/async/container/error.rb

@@ -12,15 +12,15 @@ class Error < StandardError
 
 		# Similar to {Interrupt}, but represents `SIGTERM`.
 		class Terminate < SignalException
-			SIGTERM = Signal.list['TERM']
+			SIGTERM = Signal.list["TERM"]
 
 			def initialize
 				super(SIGTERM)
 			end
 		end
 
 		class Hangup < SignalException
-			SIGHUP = Signal.list['HUP']
+			SIGHUP = Signal.list["HUP"]
 
 			def initialize
 				super(SIGHUP)

lib/async/container/forked.rb

@@ -3,8 +3,8 @@
 # Released under the MIT License.
 # Copyright, 2017-2022, by Samuel Williams.
 
-require_relative 'generic'
-require_relative 'process'
+require_relative "generic"
+require_relative "process"
 
 module Async
 	module Container

lib/async/container/generic.rb

@@ -3,18 +3,18 @@
 # Released under the MIT License.
 # Copyright, 2019-2024, by Samuel Williams.
 
-require 'async'
+require "async"
 
-require 'etc'
+require "etc"
 
-require_relative 'group'
-require_relative 'keyed'
-require_relative 'statistics'
+require_relative "group"
+require_relative "keyed"
+require_relative "statistics"
 
 module Async
 	module Container
 		# An environment variable key to override {.processor_count}.
-		ASYNC_CONTAINER_PROCESSOR_COUNT = 'ASYNC_CONTAINER_PROCESSOR_COUNT'
+		ASYNC_CONTAINER_PROCESSOR_COUNT = "ASYNC_CONTAINER_PROCESSOR_COUNT"
 
 		# The processor count which may be used for the default number of container threads/processes. You can override the value provided by the system by specifying the `ASYNC_CONTAINER_PROCESSOR_COUNT` environment variable.
 		# @returns [Integer] The number of hardware processors which can run threads/processes simultaneously.

lib/async/container/group.rb

@@ -3,10 +3,10 @@
 # Released under the MIT License.
 # Copyright, 2018-2024, by Samuel Williams.
 
-require 'fiber'
-require 'async/clock'
+require "fiber"
+require "async/clock"
 
-require_relative 'error'
+require_relative "error"
 
 module Async
 	module Container

lib/async/container/hybrid.rb

@@ -4,8 +4,8 @@
 # Copyright, 2019-2022, by Samuel Williams.
 # Copyright, 2022, by Anton Sozontov.
 
-require_relative 'forked'
-require_relative 'threaded'
+require_relative "forked"
+require_relative "threaded"
 
 module Async
 	module Container

lib/async/container/notify.rb

@@ -3,9 +3,9 @@
 # Released under the MIT License.
 # Copyright, 2020-2022, by Samuel Williams.
 
-require_relative 'notify/pipe'
-require_relative 'notify/socket'
-require_relative 'notify/console'
+require_relative "notify/pipe"
+require_relative "notify/socket"
+require_relative "notify/console"
 
 module Async
 	module Container

lib/async/container/notify/console.rb

@@ -3,9 +3,9 @@
 # Released under the MIT License.
 # Copyright, 2020-2024, by Samuel Williams.
 
-require_relative 'client'
+require_relative "client"
 
-require 'console/logger'
+require "console/logger"
 
 module Async
 	module Container