Github Milestones -> Ical

.netrc

machine api.github.com
  login your-username
  password your-40-char-token

ical-of-milestones.rb

# ruby ical-of-milestone.rb "Project Name" user0/repo0 user1/repo1
require 'icalendar'
require 'octokit'

client = Octokit::Client.new :netrc => true
milestones = []
ARGV[1..-1].each do |reponame|
  client.milestones(reponame).each do |m|
    milestones << m
  end
end

cal = Icalendar::Calendar.new
milestones.
  sort_by { |m| m[:due_on] }.
  each do |m|
    cal.event do |e|
      e.url = m[:html_url]
      e.dtstart = e.dtend = e.dtstamp = m[:due_on]
      e.created = m[:created]
      e.last_modified = m[:updated]
      e.uid = "#{m[:id]}"
      e.summary = "#{ARGV[0]} #{m[:title]}"
      e.description = m[:description]
      e.organizer = "MAILTO:#{m[:creator][:login]}@users.noreply.github.com"
    end
  end
cal.publish
puts cal.to_ical