root/lang/ruby/coderepos_stat/coderepos-stat.rb

#!/usr/bin/env ruby
#
# Author:: MIZOGUCHI Coji <mizoguchi.coji at gmail.com>
# License:: Distribute under the same terms as Ruby
#
# $Id$
#
require 'cgi'

stat = {}
Dir.glob("data/*/*.yaml").sort.each do |f|
  date = File.basename(File.dirname(f))
  stat[date] ||= 0
  stat[date] += 1
end

cgi = CGI.new
size = '200x150'
if cgi.has_key? 'size'
  m = /(\d+)x(\d+)/.match(cgi['size'])
  size = '%sx%s' % [m[1], m[2]] if m and m.size == 3
end

sorted_keys = stat.keys.sort
sorted_label = sorted_keys.map{|k| "#{k[4..5]}-#{k[6..7]}"}
sorted_data = sorted_keys.map{|k| stat[k]}
max = sorted_data.max
sorted_data = sorted_data.map{|e| (e * 100 / max)}

params = Array.new
params << "chs=#{CGI.escape(size)}"
params << "cht=lc"
params << "chxt=x,y"
params << "chxl=0:|#{sorted_label.join('|')}|1:||#{max}"
params << "chd=t:#{sorted_data.join(',')}"
params << "chtt=CodeRepos%20commits/day"

puts "Location: http://chart.apis.google.com/chart?#{params.join('&')}"
puts