The German computer magazine c't has covered Debsources in its most recent edition (c't 16/2013). In that article, they also state:
Debsources integriert auch eine Code-Suche, allerdings werden lediglich die Quellen des Unstable-Zweigs durchsucht, der zirka ein Drittel des Quellcodes von Debsources ausmacht.
This loosely translates to:
Debsources also integrates a code search engine, but it only searches the sources of the unstable tree, which makes up for roughly one third of the sources that Debsources covers.
I suspect the author of the article arrived at this conclusion because Debsources talks about 400 GiB of source code, whereas Debian Code Search talks about 130 GiB of source code.
However, it still struck me as odd and giving the wrong impression. I thought
that packages don’t differ that much between stable, testing and unstable. So I
psql and pounded UDD
until it revealed how many packages are different between stable, testing and
So, in conclusion, Debian Code Search covers 74% of wheezy, testing and unstable. Debsources also covers contrib and non-free, which explains the higher disk usage. In particular, there might be big blobs in non-free that account for a lot of disk space. Also, Debsources keeps sources around for a few weeks whereas Debian Code Search only keeps the most recent snapshot.
SELECT COUNT(*) FROM (SELECT migrations.source, sources.version AS stable_version, testing_version, unstable_version FROM sources LEFT JOIN migrations USING (source) WHERE sources.release = 'wheezy') AS x WHERE regexp_replace(stable_version::text, E'-([0-9.]+)$', '') = regexp_replace(testing_version::text, E'-([0-9.]+)$', '');