raw-to-jpg is a Python script which converts CR2 images to JPG.
A requirements.txt file is included, however, additional setup is required because the PIP version of rawkit requires libraw 0.19.0 to work. As a workaround, clone the latest version of rawkit from github (https://github.com/photoshell/rawkit) and copy/paste the libraw directory into the virtual env.
python raw-to-jpg.py <file>