simpleironlooper.rb

require 'rubygems'
require 'spec'
require 'spec/autorun'
@watches = []

def watch(matcher, &block)
  @watches << Matcher.new(matcher, &block)
end
def do_a_loop(sender, arg)
  puts "found a #{arg.change_type} with #{arg.name}"
  @watches.each {|w| w.do_if_matched arg.name }
end
def start_watching
  watcher =  System::IO::FileSystemWatcher.new
  watcher.path = "."
  watcher.include_subdirectories = true
  watcher.notify_filter = System::IO::NotifyFilters.last_write | System::IO::NotifyFilters.file_name | System::IO::NotifyFilters.directory_name

#  watcher.changed do |s,a|
#    do_a_loop s, a
#  end
  watcher.created do |s,a|
    do_a_loop s, a
  end
#  watcher.deleted do |s,a|
#    do_a_loop s, a
#  end
#  watcher.renamed do |s,a|
#    do_a_loop s, a
#  end
  watcher.enable_raising_events = true
  puts "pres 'q' to quit."
  while "q" != System::Console.read
  end
end
class Matcher
  def initialize(matcher, &block)
    @matcher = Regexp.compile(matcher)
    @block = block
  end
  def do_if_matched(arg)
    matches = @matcher.match arg
    if not matches.nil?
      if matches.size == 1
        @block.call arg
      else
        @block.call matches[1]
      end
    end
  end
end

watch( 'lib\\\\(.*)\\.rb' ) do |md|
  puts "Running specs because of #{md}"
  puts "spec spec\\#{md}_spec.rb"
  system "spec spec\\#{md}_spec.rb"
end
watch( 'spec\\\\(.*)_spec.rb') do |md|
  puts "Running specs because of specs"
  system("spec spec\\#{md}_spec.rb")
end

start_watching()