Determine current code distribution by author
I thought it would be neat if it were possible to take a Git repository, run some script, and have it generate the number of lines in the code base, and the proportion of each author that contributed to it.
Basically, because I am kind of a competitive coder, I would like a personal metric to see if the number of lines that I've written (in the current HEAD) are greater than my partner(s). It would be a fun statistic to say "I wrote % of the current codebase".
Has anyone ever thought to do this? I've looked for a way, but my shell scripting is not the best, so I couldn't do it alone.
You can use git log, as illustrated in "Which Git commit stats are easy to pull".
Or you can have a look at Git Lookatgit project, which does inspect the number of lines changed, as seen in its gitauthor.rb class.
You probably need gitdm, it can do exactly what you need. We use it for Mahara project to produce contribution statistics.
Just do what README suggests:
A typical command line used to generate the "who write 2.6.x" LWN articles looks like:
git log -p -M v2.6.19..v2.6.20 | gitdm -u -s -a -o results -h results.html
You can also customise it for your own purposes.
You could try to parse the output of git-blame . This command gives the last person that edited each line of a file.
This example is not exactly what you want but I think it gives you the idea:
git blame -e the/file | awk -F '<|>' '{print $2}' | sort | uniq -c
This will print the e-mail addresses of the authors together with the number of lines they modified lastly for a file, for example:
47 foo@bar.com
34712 blah@baz.com
To make it run on the whole repository, you can do something like this:
git ls-files | while read f; do git blame -e $f; done | awk -F '<|>' '{print $2}' | sort | uniq -c
The idea here is to first generate the list of files with git ls-files, and then run the above snippet on each of the files (using the snippet mentioned here). If you're running this on a large codebase, you may want to store intermediate results in temporary files rather than use pipes.
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