Checking versions in Debian-based systems is a bit of a pain.
This happens to me a couple of times a month: for some reason I need
to know what version of something I'm currently running -- often a
library, like libgtk.
will tell you all about a package -- but only if you know its exact name.
You can't do
aptitude show libgtk or even
aptitude show '*libgtk*' -- you have to know that the
package name is libgtk2.0-0. Why is it libgtk2.0-0? I have no idea,
and it makes no sense to me.
So I always have to do something like
aptitude search libgtk | egrep '^i' to find out what
packages I have installed that matches the name libgtk, find the
package I want, then copy and paste that name after typing
But it turns out it's super easy in Python to query Debian packages using the Python apt package. In fact, this is all the code you need:
import sys import apt cache = apt.cache.Cache() pat = sys.argv for pkgname in cache.keys(): if pat in pkgname: pkg = cache[pkgname] instver = pkg.installed if instver: print pkg.name, instver.versionThen run
aptver libgtkand you're all set.
In practice, I wanted nicer formatting, with columns that lined up, so the actual script is a little longer. I also added a -u flag to show uninstalled packages as well as installed ones. Amusingly, the code to format the columns took about twice as many lines as the code that does the actual work. There doesn't seem to be a standard way of formatting columns in Python, though there are lots of different implementations on the web. Now there's one more -- in my aptver on github.
[ 15:07 May 15, 2013 More linux | permalink to this entry | comments ]