Quick Script to pull versions of all cookbooks from a node

script.rb

require 'json'

# Cookbooks from a folder (like when you do a berks vendor)
# json = Dir.glob('./*/metadata.json').collect do |file|

# Cookbooks from a node cache
json = Dir.glob('/var/chef/cache/cookbooks/*/metadata.json').collect do |file|
  hash = JSON.parse(File.read(file))
  { hash['name'] => hash['version'] }
end.reduce({}, :merge).to_json

puts json