Log in to a docker repository in AWS ECR using the current profile

aws-docker-login.rb

#!/usr/bin/env ruby

# frozen_string_literal: true

require 'json'
require 'base64'
require 'open3'

puts 'Getting authorization token...'
out, status = Open3.capture2 'aws', 'ecr', 'get-authorization-token'
exit status.exitstatus unless status.success?

token_info = JSON.parse(out)['authorizationData'][0]
username, password = Base64.decode64(token_info['authorizationToken']).split(':', 2)
endpoint = token_info['proxyEndpoint']

puts "Authenticating as #{username} to #{endpoint}..."
out, status = Open3.capture2e 'docker', 'login', '-u', username, '--password-stdin', endpoint, stdin_data: password
puts out
exit status.exitstatus