gistfile1.txt

#!/usr/bin/env ruby

require 'time'

begin
  require 'rubygems'
  require 'gruff'
rescue LoadError
  $stderr.puts "git-statgraph requires RubyGems and the rmagick and gruff gems"
  exit 1
end

# stats = {
#   timestamp => [
#     { author => '[email protected]', diffstat => '...' }
#   ],
#
#   timestamp => [ ... ],
#   ...
stats = {}

# small helper method to turn the diffstat into a LOC delta
def parse_diffstat( line )
  ins, del = line.match( /(\d+) insertions.*?(\d+) deletions/ )[1,2]
  return ins.to_i - del.to_i
end

puts "Parsing commit logs..."
IO.popen( 'git log --shortstat --pretty=format:"%aE%%%ad"' ) do |io|
  io.each_line do |line|
    next if line.strip.empty?

    if line =~ /%/ # committer line
      components = line.split( /%/,2 )
      @author = components.first
      @date   = Time.parse( components.last )

    else # stat line
      stats[ @date ] ||= []
      stats[ @date ] <<  { :author => @author, :diffstat => parse_diffstat(line) }
    end

  end
end


sorted_dates  = stats.keys.sort
initial_state = stats[ sorted_dates.first ].pop[ :diffstat ]
current_state = initial_state
states = []


sorted_dates.each_with_index do |date, idx|
  states << current_state

  stats[date].each do |diffstat|
    current_state += diffstat[:diffstat]
  end
end

labels = {}
skip_factor = sorted_dates.size / 10
10.times do |idx|
  offset = idx * skip_factor
  labels[ offset ] = sorted_dates[ offset ].strftime("%m/%y")
end

puts "Generating graph..."
g = Gruff::Line.new( 2500 )
g.title = "#{File.basename Dir.getwd} Size"
g.data "LOC", states
g.labels = labels

g.write('my_fruity_graph.png')



# vim: set ft=ruby