$ bundle exec cap production deploy
...
00:05 deploy:symlink:linked_dirs
    ...
      20 ln -s /var/www/docs.ruby-lang.org/shared/public/en/trunk /var/www/docs.ruby…
    ✔ 20 rurema@docs-origin.ruby-lang.org 0.121s
      21 ln -s /var/www/docs.ruby-lang.org/shared/public/ja/trunk /var/www/docs.ruby…
    ✔ 21 rurema@docs-origin.ruby-lang.org 0.124s
...

$ ls -l /var/www/docs.ruby-lang.org/current/public/ja/
...
lrwxrwxrwx 1 rurema rurema   51 Jan  1 14:31 latest -> /var/www/docs.ruby-lang.org/shared/public/ja/latest
lrwxrwxrwx 1 rurema rurema   50 Jan  1 14:31 trunk -> /var/www/docs.ruby-lang.org/shared/public/ja/trunk

$ ls -l /var/www/docs.ruby-lang.org/shared/public/ja/
...
lrwxrwxrwx 1 rurema rurema    5 Jan  1 14:37 latest -> 2.5.0
drwxr-xr-x 2 rurema rurema 4096 Aug 15 11:09 trunk