Ruby gem dependency graph outdegree sampler

sample_outdegree

#!/usr/bin/env ruby

require 'rubygems'
require 'open-uri'

sample_size = 1000

specs = Marshal.load(Gem.gunzip(File.read("latest_specs.4.8.gz")))
sample = specs.sample(sample_size)

total_dependencies = sample.map do |sample|
  begin
    compressed = open("http://rubygems.org/quick/Marshal.4.8/#{sample[0]}-#{sample[1].to_s}.gemspec.rz").read
    inflated = Gem.inflate(compressed)
    unmarshalled = Marshal.load(inflated)
    count =   unmarshalled.dependencies.count
    puts "#{sample[0]} version #{sample[1].to_s} has #{count} dependencies"
    count
  rescue
    0
  end
end.inject(:+)

p "AVERAGE: #{total_dependencies.to_f / sample_size}"