--- /dev/null
+" 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