Identifies the owners of all of a Github organization's private repos based on initial commits.

breakdown_repos.rb

#!/usr/bin/env ruby
# encoding: utf-8
#
# Usage: ruby breakdown_repos.rb > repos.csv
#

require 'github_api'

BASIC_AUTH = 'username:personalaccesstoken'
ORG = 'myOrg'

github = Github.new(basic_auth: BASIC_AUTH, auto_pagination: true)

org_repos = github.repos.list(org: ORG)
private_repos = org_repos.select { |repo| repo[:private] }

user_repos = private_repos.each_with_object(Hash.new { |k, v| k[v] = Array.new }) do |repo, h|
  user = github.repos.commits.list(ORG, repo.name)[-1].commit.author.email
  h[user] << { name: repo.name, created_at: repo.created_at }
end

user_repos.each do |user, repos|
  repos.each do |repo|
    puts [user, *repo.values_at(:name, :created_at)].join(',')
  end
end