Move preloaded modules to separate file

Cargo.toml

@@ -9,6 +9,7 @@ edition = "2018"
 assets = [
 	["github-fast-env/github-fast-envd.rb", "usr/bin/github-fast-envd", "755"],
 	["github-fast-env/github-fast-env.rb", "usr/bin/github-fast-env", "755"],
+	["github-fast-env/preload.rb", "usr/lib/github-fast-env/", "755"],
 	["github-fast-env/systemd/github-fast-envd.service", "usr/lib/systemd/system/", "644"],
 	["ghe-fast-tools/ghe-fast-console.rb", "usr/lib/ghe-fast-tools/", "644"],
 	["ghe-fast-tools/bin/ghe-fast-console.rb", "usr/bin/ghe-fast-console", "755"],

github-fast-env/github-fast-envd.rb

@@ -4,10 +4,6 @@ require "base64"
 require "io/console"
 require "socket"
 
-require "/data/github/current/config/environment"
-require "irb"
-require "irb/completion"
-
 class ClientError < StandardError
 	def initialize(message)
 		super(message)
@@ -154,6 +150,8 @@ def set_up_pseudoterminal(control_socket, pseudoterminal_path)
 	control_socket.puts "ready"
 end
 
+load "/usr/lib/github-fast-env/preload.rb"
+
 while true
 	control_socket = control_server.accept
 	$original_stderr.puts "- new connection"

github-fast-env/preload.rb

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+
+require "/data/github/current/config/environment"
+require "irb"
+require "irb/completion"