Choose a directory to download both brackets-shell and brackets git respositories. The following script will setup the repositories and download required dependencies.
wget https://gist.github.com/jasonsanjose/5514813/raw/6215f3b73ff41f51e20bc94a9faa3e453402ce06/setup.sh; chmod +x setup.sh; bash setup.sh; rm setup.sh
I just tested this in 15.04 and 12.04 and noticed that the script is missing
unzip
from the dev dependencies.