Simplified Ruby tools extension checking

src/ruby/tools/bin/protoc.rb

@@ -30,14 +30,7 @@
 
 require 'rbconfig'
 
-require_relative '../os_check'
-
-protoc_name = case OS.os_name
-              when 'windows'
-                'protoc.exe'
-              else
-                'protoc'
-              end
+protoc_name = 'protoc' + RbConfig::CONFIG['EXEEXT']
 
 protoc_path = File.join(File.dirname(__FILE__),
                         RbConfig::CONFIG['host_cpu'] + '-' + OS.os_name,

src/ruby/tools/bin/protoc_grpc_ruby_plugin.rb

@@ -30,14 +30,7 @@
 
 require 'rbconfig'
 
-require_relative '../os_check'
-
-plugin_name = 'grpc_ruby_plugin' + case OS.os_name
-                                   when 'windows'
-                                     '.exe'
-                                   else
-                                     ''
-                                   end
+plugin_name = 'grpc_ruby_plugin' + RbConfig::CONFIG['EXEEXT']
 
 plugin_path = File.join(File.dirname(__FILE__),
                         RbConfig::CONFIG['host_cpu'] + '-' + OS.os_name,

src/ruby/tools/os_check.rb

@@ -1,45 +0,0 @@
-# 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