redmine.rb

# Usage: $ REDMINE_API_KEY=1234567890 ruby planio.rb

require 'json'
require 'open-uri'
require 'statsd-ruby'

def parse_api_json(relative_path)
  include OpenURI

  # TODO: check the relative path is a json endpoint
  open("https://ncr.plan.io#{relative_path}",
       'X-Redmine-API-Key' => ENV['REDMINE_API_KEY']) do |f|
    json = f.read
    json == '' ? {} : JSON.parse(json)
  end
end

statsd = Statsd.new '127.0.0.1', 8125

raise 'Environment variable REDMINE_API_KEY not defined' if ENV['REDMINE_API_KEY'].nil?

loop do
  total_count = parse_api_json('/issues.json?offset=0&limit=1')['total_count']
  statsd.gauge('dev.planio.open_issues', total_count)

  print '.'

  sleep 60
end