I'm in search of a module (or technique) to keep track of the software/release version that a Drupal installation is running. I am not talking about the Drupal version running the site (e.g 7.12) but of the implemented site itself, exactly like any Stack Exchange site does on the footer (currently: rev 2012.4.5.2127).
I need a structured way to keep track of this data (so a plain text block on the footer will not do) because I'll need to access this information from other systems as well.
Currently I've solved it by using a persistent variable that I handle with Drush.
# Set it. drush vset --always-set release "1.0.4" # Get it. drush vget release
Is there another (probably better) way of handling this?