Get Docker image metadata from ECR - ruby version

get_image_data_from_ecr.rb

require 'aws-sdk'
REPO_NAME = 'mdsol/mauth/distro'
REGION = 'us-east-1'
ecr = Aws::ECR::Client.new(region: REGION)

# get list of image tags in the repo
resp = ecr.list_images(repository_name: REPO_NAME)
tags = resp.image_ids.map{|id| id.image_tag}

# get manifests for all tags at once
resp = ecr.batch_get_image(repository_name: REPO_NAME,
  image_ids: tags.map{|t| {image_tag: t}})

# The manifest is encoded as JSON in the JSON response -  :-/
manifest = JSON.parse(resp.images.first.image_manifest)
# ... and THEN, each layer's metadata is encoded within THAT!   >-{
image_metadata = JSON.parse(manifest['history'].first['v1Compatibility'])
labels         = image_metadata['config']['Labels']
image_command  = (
  image_metadata['config']['Entrypoint'] +
  image_metadata['config']['Cmd']
).join(' ')