lib/vcr/tasks/vcr.rake
namespace :vcr do
desc "Migrate cassettes from the VCR 1.x format to the VCR 2.x format."
task :migrate_cassettes do
dir = ENV.fetch('DIR') { raise "You must pass the cassette library directory as DIR=<directory>" }
require 'vcr/cassette/migrator'
VCR::Cassette::Migrator.new(dir).migrate!
end
end