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Comment by taybin | Hacker News Reader

I'd like to see that script.

Here is a sample implementation:

    git log --author=rav --numstat --no-merges --pretty=format: |
        awk -e '{ a += $1; b += $2; } END { print a; print b; print a-b; }'

produces this output (sum additions, sum deletions, net line additions):

    112529
    85383
    27146

Ha, nice, there's two options that definitely would've simplified my code (--numstat and --no-merges).

To count by author:

    git log --numstat --no-merges --pretty=format:%an
        | awk '
          author == "" { author = $0; next }
          /^$/ { author = ""; next }
          { added[author] += $1; removed[author] += $2 }
          END { for (author in added) {
            print author, "added", added[author], "removed", removed[author], "sum", added[author]-removed[author]
          } }'
        | sort -n -k 7

That is great! Thank you.

Unfortunately I forgot to grab it off my work laptop when I got laid off. I would've liked to have stuck it up on github...

It wasn't really all that tricky though, it took me a few hours to write. git-log has options for only displaying the status line of diff-stat for each commit, and then displaying the parents of each commit, and the author. You look to see that there's only one parent (so it's not a merge), parse out the X added, Y deleted numbers, and stick them in a dictionary keyed by name.

A lot of the script was just getting statistics like average/min/max/stddev line counts, and printing them nicely.

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