Prints a command line graph of when people commit: git log --pretty="format:%ai,%an"| ~/gitty.rb Assembled from an old 37signals post.

gitty_up.rb

#!/usr/bin/ruby

require 'date';
people = {};

ARGF.each_line {
    |l| time, author = l.split(',');
    people[author] ||= Array.new(24, 0);
    hour = DateTime.parse(time).hour;
    people[author][hour] += 1;
};

people.each_pair {
    |name, times| puts name;
    tot = times.inject(0) {
        |sum, t| sum + (t || 0)
    };
    times.each_with_index {
        |t, i| puts i.to_s.rjust(2) + ': ' + '█' * (t.to_f/tot * 100).round
    }
}