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Contents
module Lono::Output
class Template
extend Memoist
def initialize(blueprint, template)
@blueprint, @template = blueprint, template
end
def required_parameters
parameters.select { |logical_id, p| p["Default"].nil? }
end
def optional_parameters
parameters.reject { |logical_id, p| p["Default"].nil? }
end
def parameters
list = data["Parameters"] || []
# Not using sort_parameter_group because structure is different
list.sort_by do |name, data|
optional = !data["Default"].nil?
[optional, name].join('-')
end.to_h
end
def parameter_groups
interface = data.dig("Metadata", "AWS::CloudFormation::Interface")
return unless interface
pgs = interface["ParameterGroups"]
pgs.inject({}) do |result, pg|
label = pg["Label"]["default"]
parameters = sort_parameter_group(pg["Parameters"])
result.merge(label => parameters)
end
end
def data
template_path = "#{Lono.config.output_path}/#{@blueprint}/templates/#{@template}.yml"
check_template_exists!(template_path)
YAML.load(IO.read(template_path))
end
memoize :data
private
def sort_parameter_group(list)
list.sort_by do |name|
raw_parameters = data["Parameters"] || []
param = raw_parameters[name]
optional = !param["Default"].nil?
[optional, name].join('-')
end
end
# Check if the template exists and print friendly error message. Exits if it
# does not exist.
def check_template_exists!(template_path)
return if File.exist?(template_path)
puts "The template #{template_path} does not exist. Are you sure you use the right template name? The template name does not require the extension.".color(:red)
exit 1
end
end
end
Version data entries
24 entries across 24 versions & 1 rubygems