Eager-load ruby client code

_support/release

@@ -4,6 +4,8 @@ require 'erb'
 require_relative 'run.rb'
 GEM_NAME = 'gitaly'
+RUBY_PREFIX = 'ruby/lib'
+RUBY_VERSION_FILE = 'gitaly/version.rb'
 def main(version)
   run!(%w[_support/generate-from-proto])
@@ -11,6 +13,7 @@ def main(version)
   run!(%w[git diff --quiet --exit-code])
   puts 'Testing for staged changes'
   run!(%w[git diff --quiet --cached --exit-code])
+  write_ruby_requires
   write_version_files(version)
   version_msg = "Version #{version}"
   run!(%W[git commit -m #{version_msg}])
@@ -45,11 +48,27 @@ module Gitaly
   VERSION = "#{version}"
 end
 EOT
-  version_rb = 'ruby/lib/gitaly/version.rb'
+  version_rb = File.join(RUBY_PREFIX, RUBY_VERSION_FILE)
   open(version_rb, 'w') { |f| f.write(version_rb_template.result) }
   run!(%W[git add #{version_rb}])
 end
+def write_ruby_requires
+  requires = Dir.chdir(RUBY_PREFIX) { Dir['gitaly/*_services_pb.rb'] }
+  abort "No auto-generated Ruby service files found" if requires.empty?
+  requires.unshift(RUBY_VERSION_FILE)
+  gem_root = File.join(RUBY_PREFIX, 'gitaly.rb')
+  gem_root_template = ERB.new <<EOT
+# This file is generated by _support/release. Do not edit.
+$:.unshift(File.expand_path('../gitaly', __FILE__))
+<% requires.each do |f| %>
+require '<%= f.sub(/\.rb$/, '') %>'
+<% end %>
+EOT
+  open(gem_root, 'w') { |f| f.write(gem_root_template.result(binding)) }
+  run!(%W[git add #{gem_root}])
+end
+
 def error(msg)
   warn "#{$0}: #{msg}"
 end