gistfile1.rbx

WIN32 = %r/djgpp|(cyg|ms|bcc)win|mingw/ =~ RUBY_PLATFORM unless defined? WIN32

DEV_NULL = WIN32 ? 'NUL:' : '/dev/null'

def quiet( &block )
  io = [STDOUT.dup, STDERR.dup]
  STDOUT.reopen DEV_NULL
  STDERR.reopen DEV_NULL
  block.call
ensure
  STDOUT.reopen io.first
  STDERR.reopen io.last
  $stdout, $stderr = STDOUT, STDERR
end

DIFF = if WIN32 then 'diff.exe'
       else
         if quiet {system "gdiff", __FILE__, __FILE__} then 'gdiff'
         else 'diff' end
       end unless defined? DIFF

SUDO = if WIN32 then ''
       else
         if quiet {system 'which sudo'} then 'sudo'
         else '' end
       end

puts "foo" # this does not print under JRuby