They're tracking any open source project that's registered on their website. If you have or know about an open source project that's not on Ohloh, you'll have to register it and specify its repositories (and branches).
Well, then a possible explanation is that people don't submit much projects to their website anymore and thus there are only "old" projects that are getting more and more mature and thus needing less commits.
I couldn't find any figure to back this though.
But I do remember that Ohloh used to be quite popular and I'm sure as hell that it's not anymore.
They're tracking any open source project that's registered on their website. If you have or know about an open source project that's not on Ohloh, you'll have to register it and specify its repositories (and branches).
Ohloh shows scary decline in open-source project additions to Ohloh
They're tracking any open source project that's registered on their website. If you have or know about an open source project that's not on Ohloh, you'll have to register it and specify its repositories (and branches).
Ohloh shows scary decline in open-source project additions to Ohloh
That the most probable explanation, I believe. But did you find a real figure somewhere? I couldn't.
Seems to shadow the recession. I wonder how this compares to closed-source commits.
One theory: programmer utilization at companies has increased with the recession, so there is less time for open-source commits. Another theory: a huge fraction of open-source in recent years is written by programmers paid by companies to work on it. The recession has caused these programmers to be pulled off and put on projects where their time can be billed directly. Third theory, there is more use of distributed v…
Well, in contrast to the second theory, there's the possibility that open source commits and closed source commits look pretty much the same. They're mostly done by people looking to get a paycheck, and without a paycheck the quantity drops. People aren't necessarily being pulled off open source to work on closed source, they're just being laid off (which seems supported by the unemployment stats.)
We at Black Duck noticed it too. So far, looks like the decline is largely because, lately Ohloh - a) hasn't kept up with discovering new projects. b) hasn't paid needed attention to keeping existing projects up to date.
We'll provide more details once transition is over (we just acquired Ohloh from Geeknet).
What about the possibility of the emergence of distributed version control? Perhaps this is causing less actual commits to the actual project, but not necessarily less code being written.