Brew cask upgrade utility for Mac OS brew package manager

The script checks for new versions of installed programs and installs them if there any. The main advantage is that a program is uninstalled before upgrade. It ensures performing necessary cleanup steps that are described in uninstallation script of the program.

To use script, just put brew-cask-upgrade into /usr/local/bin and execute sudo chmod +x /usr/local/bin/brew-cask-upgrade. Then simply run brew-cask-upgrade in the shell. No additional packages are needed.

Use brew-cask-upgrade -h to get additional info.

The script is tested in Python 2.7/3.4-3.6.