Comment 2 for bug 1225113

Presently it isn't the easiest thing, soon it should get easier...

https://bugs.launchpad.net/ubuntu-system-image/+bug/1220907 for reference...

root@ubuntu-phablet:/# system-image-cli -i
current build number: 46
device name: mako
channel: daily-proposed
last update: 2013-09-13 03:15:49

With the bug above, you will in theory be able to get the ubuntufs build number and potentially also the androidfs build number. Presently you can get the ubuntufs build number from /etc/media-info. The only current way to get the androidfs number is from the json file on system-image.ubuntu.com

On cdimage I'm not presently aware of a way to tell that it is a touch build vs a desktop build. This part would require more research, though with the system-images now being the 'preferred method' of running touch, I'm not sure how much effort should be spent on cdimage if it isn't quite easy.