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module Gitlab
module Ci
class Config
module Extendable
class Entry
attr_reader :key
def initialize(key, context, parent = nil)
@key = key
@context = context
@parent = parent
raise StandardError, 'Invalid entry key!' unless @context.key?(@key)
end
def extensible?
value.is_a?(Hash) && value.key?(:extends)
end
def value
@value ||= @context.fetch(@key)
end
def base_hash!
@base ||= Extendable::Entry
.new(extends_key, @context, self)
.extend!
end
def extends_key
value.fetch(:extends).to_s.to_sym if extensible?
end
def path
Array(@parent&.path).compact.push(key)
end
def extend!
return value unless extensible?
if unknown_extension?
raise Extendable::Collection::InvalidExtensionError,
'Unknown extension!'
end
if invalid_base?
raise Extendable::Collection::InvalidExtensionError,
'Invalid base hash!'
end
if circular_dependency?
raise Extendable::Collection::CircularDependencyError
end
@context[key] = base_hash!.deep_merge(value)
end
private
def circular_dependency?
path.count(key) > 1
end
def unknown_extension?
!@context.key?(key)
end
def invalid_base?
!@context[extends_key].is_a?(Hash)
end
end
end
end
end
end
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