Sublime Text from Command Line
From build 3065 (Release Date: 29 August 2014) onwards Sublime text includes a ligne de commande helper, nameley subl.exe. It is at sublime’s installation folder: copy it in to a folder included in the system path.
Par exemple, in my case I copied it
from C:\Program Files\Sublime Text 3
to C:\Windows\System32
You may then use in your terminal/console subl as a command to open whatever file, such as in your example:
subl file.rb
Or you may as well modify your system PATH variable to include sublime’s instalation folder, but I believe that is much more involved.