Split List object definition YAML into separate files

split-k8s-yaml

#!/usr/bin/env ruby

require 'yaml'

def kind_to_sub_extension(kind)
  case kind
  when 'ConfigMap'
    'cm'
  when 'DaemonSet'
    'ds'
  when 'Deployment'
    'deploy'
  when 'Service'
    'svc'
  else
    kind.downcase
  end
end

YAML.load(ARGF.read)['items'].each do |item|
  name = item.dig('metadata', 'name')
  kind = item.fetch('kind')
  file = "#{name}.#{kind_to_sub_extension(kind)}.yaml"
  warn "Creating #{file}..."
  open(file, "w") do |f|
    f.write(YAML.dump(item))
  end
end

warn "Finished."