Using the comitup repository.
Here is how to add comitup to apt repository resources for your system, letting you install and
automatically upgrade with standard tools.
First, add one of this reference to the comitup PPA to your /etc/apt/sources.list file (as root):
deb http://davesteele.github.io/comitup/repo comitup main
Add the repository key to your apt key ring:
$ wget https://davesteele.github.io/key-366150CE.pub.txt
$ sudo apt-key add key-366150CE.pub.txt
Install the packages with :
$ sudo apt-get update
$ sudo apt-get install comitup
The packages will be updated with every 'apt-get upgrade'.
Note that additional steps may be needed.