'/dev/null' has to be 'NUL' on Windows

[Awem]

I'm using Rails 4.1.0.rc2 on Windows (Ruby 2.0p195) with spring-1.1.2. After installation I tried:

bundle exec spring binstub --all

This raises an exception:

C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/spring-1.1.2/lib/spring/env.rb:19:in `initialize': No such file or directory - /dev/null (Errno::ENOENT)

Replacing line 19 in env.rb with the following line fixes the issue and everything runs fine:

@log_file     = File.open(ENV["SPRING_LOG"] || "NUL", "a")

However, this might not work on other OS.

[jonleighton]

Note that Spring does not support Windows in general since Process.fork is not supported on that platform.