Heroku app releases this year

releases.rb

require "json"
require "time"

#
# usage: releases.rb <app>
#

def get_releases(app)
  # use curl for -n
  JSON.parse(`curl --silent -n -H "Accept: application/vnd.heroku+json; version=3" -H "Range: seq ..; order=desc, max=1000" https://api.heroku.com/apps/#{app}/releases`)
end

app = ARGV[0] || abort("usage: releases.rb <app>")
data = get_releases(app)
num_releases = data.count { |r|
  Time.parse(r["created_at"]).year == Time.now.year
}

puts "#{num_releases} releases in #{Time.now.year}"