# File lib/churn/scm/git_analyzer.rb, line 18
    def generate_history(starting_point)
      get_commit_history.each do |commit|
        `git checkout #{commit}`
        commit_date = `git show -s --format="%ci"`
        commit_date = Time.parse(commit_date)
        next if commit_date < starting_point
        #7776000 == 3.months without adding active support depenancy
        start_date  = (commit_date - 7776000)
        `churn -s "#{start_date}"`
      end
    ensure
      `git checkout master`
    end