Add Gemfile, handy for CI.

Gemfile

@@ -0,0 +1,20 @@
+source :rubygems
+
+gem 'rack', '= 1.1.0' # 1.2 has issues
+gem 'haml'
+gem 'compass'
+gem 'rack-test'
+gem 'yard', "~> 0.5.3"
+gem 'sinatra-default_charset', '>= 0.2.0'
+gem 'rack-flash', '>= 0.1.1'
+gem 'rspec', '~> 1.3.0'
+gem 'rake', '>= 0.8.7'
+gem 'bundler', '>= 0.9'
+
+# could have used groups, but this is easier. plays nice with hudson.
+if ENV['SINATRA'] == 'sinatra master' then gem 'sinatra', :git => "git://github.com/sinatra/sinatra.git"
+else gem 'sinatra', '>= 1.0'
+end
+
+ext = ENV['EXT'] || 'backports'
+gem(*ext.split(' '))

tasks/spec.task

@@ -1,9 +1,10 @@
-def rspec(pattern, format = nil, more_opts = nil, ruby = RUBY)
+def rspec(pattern, format = nil, more_opts = nil, ruby = RUBY, command = 'spec')
   format ||= ENV["FORMAT"] || :progress
   libs  = Dir.glob("{*,.}/lib").join File::PATH_SEPARATOR
   files = Dir.glob(pattern).map { |f| f.inspect }.join " "
   opts  = ["-b -c --format #{format} --loadby mtime --reverse", *more_opts].compact.join " "
-  sh "#{ruby} -I#{libs} -S spec #{opts} #{files}"
+  command = "bundle exec #{command}" if ENV['BUNDLER']
+  sh "RUBYLIB=#{libs}:#{ENV['RUBYLIB']} #{ruby} -S #{command} #{opts} #{files}"
 end
 
 pattern = "spec/**/*_spec.rb"