Test migration of OCFL

ocfl-migrate.rb

# TODO: There is one problem with this approach
#         We have no way to differentiate the cocina.json/public/mods files from purl from the files from stacks.
#         It may be possible that one of the stacks files could have a name collision (e.g. if the name was "public")
require 'ocfl'
require 'druid-tools'
DRUIDS = %w[
bd072pn1284
]
OCFL_ROOT = '/stacks/ocfl-experiment-jcoyne'

def migrate_druid(druid)
  puts "DRUID #{druid}"
  stacks = DruidTools::PurlDruid.new("druid:#{druid}", '/stacks')
  purl = DruidTools::PurlDruid.new("druid:#{druid}", '/purl/document_cache')
  object_root = DruidTools::PurlDruid.new("druid:#{druid}", OCFL_ROOT).path
  builder = OCFL::Object::DirectoryBuilder.new(object_root:, id: "https://purl.stanford.edu/#{druid}")
  Dir.foreach(purl.path) do |file|
    next if ['.', '..'].include?(file)
    builder.copy_file(File.join(purl.path, file), destination_path: 'metadata/')
  end
  builder.copy_recursive(stacks.path, destination_path: 'data') if Dir.exist?(stacks.path)
  directory = builder.save
  puts directory.object_root.to_s
end

DRUIDS.each do |druid|
  migrate_druid(druid)
end