Reversed premature removal of a file

src/ruby/tools/bin/protoc.rb

@@ -30,6 +30,8 @@
 
 require 'rbconfig'
 
+require_relative '../os_check'
+
 protoc_name = 'protoc' + RbConfig::CONFIG['EXEEXT']
 
 protoc_path = File.join(File.dirname(__FILE__),

src/ruby/tools/bin/protoc_grpc_ruby_plugin.rb

@@ -30,6 +30,8 @@
 
 require 'rbconfig'
 
+require_relative '../os_check'
+
 plugin_name = 'grpc_ruby_plugin' + RbConfig::CONFIG['EXEEXT']
 
 plugin_path = File.join(File.dirname(__FILE__),

src/ruby/tools/os_check.rb

@@ -0,0 +1,45 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# This is based on http://stackoverflow.com/a/171011/159388 by Aaron Hinni
+
+require 'rbconfig'
+
+module OS
+  def OS.os_name
+    case RbConfig::CONFIG['host_os']
+    when /cygwin|mswin|mingw|bccwin|wince|emx/
+      'windows'
+    when /darwin/
+      'macos'
+    else
+      'linux'
+    end
+  end
+end