Making the RubyGem work (bundle & rake install) with Windows - ruby for different platforms!

Ruby file .rb:
Detecting operating systems on Ruby, the backslashes are for regex:
    Linux: /linux/
    Windows: /win32/
    Mac OS: /darwin/
So a ruby file would have these things to distinguish different code for different platforms:

case RUBY_PLATFORM
  when /i386-mingw32/ # OR /win32/ matching Gemfile.lock under PLATFORMS
    require_files :win32
  when /linux/
    require_files :linux

else
    raise "Unsupported platform #{RUBY_PLATFORM}"
end

Gemfile:
Gem Bundler's Gemfile has special syntax (documentation, and examples).

Here is an example to write Windows-only gem:

### windows specific gems ###
 gem 'win32-process', :platforms => [:mswin, :mingw]
 gem 'win32console', :platforms => [:mswin, :mingw]

or 

### windows specific gems ###
platforms :mswin, :mingw do
    gem  'win32console', '1.3.0'
    gem  'wind32-process'
end

The symbols ":mswin" and ":mingw" are special platforms groups.

gem "rspec", :group => :test
gem "wirble", :groups => [:development, :test]

Unfortunately, there is no ":linux", so it'll be a non-platform group, which means the command should be "bundle install --without linux" when running on Windows.

Yay! Can:

bundle install --without linux
rake install

commit 8b8573dcc87e673cca042e2d68569fffd586e872
try if Windows rake will work after making system/getifaddrs only for linux


====
Next step:
- downgrade to 1.8.7 ruby
- make sockets work  (google, more wireshark digging)
- How to list devices, look at: fad-win32.c.
(change :linux to :ruby to avoid "--without linux" on Windows, i.e. does :ruby work as platform thingy not just a group?)
===
IRC: freenode ruby chat
#RubyOnRails
#bundler
#ruby-lang

==
This pipe server Windomit ws gem be helpful?