Create the `data` part of a kubernetes opaque secret from an ENV file

env2yaml64.rb

require "base64"
require "dotenv"
require "yaml"

if ARGV.empty?
  puts "Usage: #{__FILE__} <env file>"
  exit 1
end

file = ARGV[0]
env = Dotenv.parse(file)
puts env.map { |key, value| [key, Base64.encode64(value).strip] }.to_h.to_yaml