This is a simple Ruby script that losslessly optimizes JPG, GIF and JPG files in a given directory, recursively.
The required tools are gifsicle, jpegtran, and pngcrush.
To run:
?> ruby optimize.rb dir/
A similar Rake task is included, but it only scans the ./public/images folder at this time.
?> rake optimize
or
?> bundle exec rake optimize
These scripts have only been tested under MacOS X.