Rakefile

require 'git'
require 'date'
require 'logger'

START_DATE = Date.parse('23/09/2013')

namespace :hw do

  desc "gets homework"
  task :get do
    puts "updating your fork with latest from the upstream homework repo..."
    g = Git.open('./hw', :logger => STDOUT)
    puts "checking out your master branch now..."
    g.checkout('master')
    puts "removing any untracked files..."
    # maybe this isn't a good idea?
    g.clean({:force => true})
    g.reset('origin/master', {:hard => true})
    g.pull('origin', 'master')
    g.branch(make_branch).checkout
  end

  def make_branch
    date = Date.today
    week_number = ((date - START_DATE).to_i / 7.0).ceil
    "week#{week_number}_day#{date.wday}"
  end

end