Class: Kybus::AWS::LayerManager

Inherits:
Object
  • Object
show all
Defined in:
lib/kybus/aws/layer_manager.rb

Instance Method Summary collapse

Constructor Details

#initialize(lambda_client, function_name) ⇒ LayerManager

Returns a new instance of LayerManager.



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# File 'lib/kybus/aws/layer_manager.rb', line 17

def initialize(lambda_client, function_name)
  @lambda_client = lambda_client
  @function_name = function_name
end

Instance Method Details

#create_layer(zip_file, layer_name, zipfile_hash) ⇒ Object 



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# File 'lib/kybus/aws/layer_manager.rb', line 34

def create_layer(zip_file, layer_name, zipfile_hash)
  response = @lambda_client.publish_layer_version(
    layer_name:,
    content: { zip_file: File.read(zip_file) },
    description: zipfile_hash,
    compatible_runtimes: ['ruby3.3']
  )
  puts "Layer '#{layer_name}' created: #{response.layer_version_arn}"
  response.layer_version_arn
end

#create_or_update_layer(zip_file, layer_name, checksum_file) ⇒ Object 



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# File 'lib/kybus/aws/layer_manager.rb', line 22

def create_or_update_layer(zip_file, layer_name, checksum_file)
  layer_exists = layer_version_exists?(layer_name)
  zipfile_hash = calculate_md5(checksum_file)

  if !layer_exists || layer_exists.description != zipfile_hash
    create_layer(zip_file, layer_name, zipfile_hash)
  else
    puts "Layer unmodified: #{layer_name}"
    layer_exists.layer_version_arn
  end
end

#get_layer_arn(layer_name) ⇒ Object 



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# File 'lib/kybus/aws/layer_manager.rb', line 52

def get_layer_arn(layer_name)
  layer_version = layer_version_exists?(layer_name)
  layer_version&.layer_version_arn
end

#layer_version_exists?(layer_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kybus/aws/layer_manager.rb', line 45

def layer_version_exists?(layer_name)
  response = @lambda_client.list_layer_versions(layer_name:, max_items: 1)
  response.layer_versions.first
rescue Aws::Lambda::Errors::ResourceNotFoundException
  nil
end