I’m a big fan of SVN, and I know it’s in very common use throughout the development community, so I thought I’d give a shout out to an interesting project that extracts some fascinating SVN stats and draws lots of pretty pictures - StatSVN

We’ve now added a StatSVN task to our build scripts, and the figures it kicks out are just great - once you start looking, you can lose yourself in there for ages….

To give some random samples:

• As of three days ago, there were 75130 lines of code in the Sonar trunk, of which Craig has contributed 33.6%, myself 32.1% and Jan 22.2%. As Jan has mostly been working on the Ruby On Rails interface, and Craig and I have mostly been writing the Java backend, what does this say about the relative expressive efficiency and productivity of each language?
• Craig took “Developer Of The Month” for February, with 5286 lines, taking over from me in January with 7546 lines.
• Over 80% of my changes are additions, with under 20% being updates. Craig is more or less the same, with a few percent more modifications - probably due to fixing my occasional “EVIL” quick hacks…
• By far and away the most commits overall get done between 4pm and 5pm, but personally, I do three times as many commits between 2pm and 3pm than any other hour. Probably because I keep saying to myself got to finish this before I go to lunch…
• Jan has not done a single commit before 12 noon However, he’s the only person to have committed between 1am and 2am!
• I do a huge number of commits on a Monday (400+), followed by successively fewer every day until Friday (~60). Does this mean I’m fresher and more enthusiastic after the weekend, or is it that when I start the week, I go for the easiest tasks first, and ramp up towards the more difficult tasks as I go on? On the other hand, overall the most commits are done on a Friday, followed by Tuesday

You can also measure some metrics around files, rather than developers:

• Overall, across all file types, we have an average of around 40 lines of code per file
• 58.7% of the files in the repository are .java, but they contribute 73.3% of the total lines of code
• On average, each .rhtml template is just 26.6 lines of code
• The most amended file in the whole repository is the Rakefile!

I could go on for hours….but it’s nearly 2pm and I need to commit some code, dammit! So install StatSVN on your repository and have a play yourself. It’s fun.