Please use denko instead. It's identical other than the name, and being up to date. I've reset the master branch of this repo to match the last Rubygems release. - @vickash
Dino lets you start programming your Arduino with Ruby in minutes.
gem install dino
Use the included command line tool to create a folder with the Arduino sketch you want to use and optionally configure it.
# If connecting via serial, USB or ser2net, this is all you should need:
dino generate-sketch serial
# If usng the ethernet shield, you'll want to specify unique MAC and IP addresses:
dino generate-sketch ethernet --mac XX:XX:XX:XX:XX:XX --ip XXX.XXX.XXX.XXX
# For more options:
dino help
Note: Current Ethernet shields come with a sticker indicating the MAC address you should use with them. For older shields without a dedicated MAC address, inventing a random one should work, but don't use the same one for multiple boards. Valid IP addresses depend on the configuration of your network.
.ino
file in the sketch folder you just generated.ruby example/led/led.rb