watchr.rb

# use watchr watchr.rb

require 'fileutils'
require 'growl'
 
$cache_dir = File.join('tmp', 'watchr')
FileUtils.mkdir_p($cache_dir) unless File.exist?($cache_dir)
 
def modified?(file)
  cache_file = File.join $cache_dir, file
 
  `diff #{file} #{cache_file} >/dev/null 2>&1`
  if $? != 0
    cache_file_dir = File.dirname cache_file
    FileUtils.mkdir_p(cache_file_dir) unless File.exist?(cache_file_dir)
    FileUtils.cp file, cache_file
    return true
  end
 
  false
end

def report_to_growl(file)
  output = %x(spec #{file} --drb --colour --format progress)
  summary = output.slice(/(\d+)\s+examples?,\s*(\d+)\s+failures?(,\s*(\d+)\s+not implemented)?/)
  puts output
  if summary
     if $~[2].to_i > 0
      Growl.notify_error  "Failed: #{summary}\n#{output}"
     else
      Growl.notify_ok "Passed: #{summary}"
     end
   end
end
 
watch( '^spec/(.*)/(.*)\.rb' ) { |md|
  modified?(md[0]) && report_to_growl(md[0])
}
 
watch( '^app/(.*)/(.*)\.rb' ) { |md|
 modified?(md[0]) && report_to_growl("spec/#{md[1]}/#{md[2]}_spec.rb")
}
 
Signal.trap('INT') {
  FileUtils.rm_r $cache_dir
  abort("\n")
}