" Ruby
au BufNewFile,BufRead *.rb,*.rbw,*.gem,*.gemspec set filetype=ruby
 
" Ruby on Rails
au BufNewFile,BufRead *.builder,*.rxml,*.rjs set filetype=ruby
 
" Rakefile
au BufNewFile,BufRead [rR]akefile,*.rake set filetype=ruby
 
" Rantfile
au BufNewFile,BufRead [rR]antfile,*.rant set filetype=ruby
 
" IRB config
au BufNewFile,BufRead .irbrc,irbrc set filetype=ruby
 
" Rackup
au BufNewFile,BufRead *.ru set filetype=ruby
 
" Capistrano
au BufNewFile,BufRead Capfile set filetype=ruby
 
" Bundler
au BufNewFile,BufRead Gemfile set filetype=ruby
 
" Autotest
au BufNewFile,BufRead .autotest set filetype=ruby
 
" eRuby
au BufNewFile,BufRead *.erb,*.rhtml set filetype=eruby