class Hiera::Backend::Yaml_backend
Public Class Methods
new(cache=nil)
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# File lib/hiera/backend/yaml_backend.rb, line 4 def initialize(cache=nil) require 'yaml' Hiera.debug("Hiera YAML backend starting") @cache = cache || Filecache.new end
Public Instance Methods
lookup(key, scope, order_override, resolution_type, context)
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# File lib/hiera/backend/yaml_backend.rb, line 11 def lookup(key, scope, order_override, resolution_type, context) answer = nil found = false Hiera.debug("Looking up #{key} in YAML backend") Backend.datasourcefiles(:yaml, scope, "yaml", order_override) do |source, yamlfile| data = @cache.read_file(yamlfile, Hash) do |data| YAML.load(data) || {} end next if data.empty? next unless data.include?(key) found = true # Extra logging that we found the key. This can be outputted # multiple times if the resolution type is array or hash but that # should be expected as the logging will then tell the user ALL the # places where the key is found. Hiera.debug("Found #{key} in #{source}") # for array resolution we just append to the array whatever # we find, we then goes onto the next file and keep adding to # the array # # for priority searches we break after the first found data item new_answer = Backend.parse_answer(data[key], scope, {}, context) case resolution_type.is_a?(Hash) ? :hash : resolution_type when :array raise Exception, "Hiera type mismatch for key '#{key}': expected Array and got #{new_answer.class}" unless new_answer.kind_of? Array or new_answer.kind_of? String answer ||= [] answer << new_answer when :hash raise Exception, "Hiera type mismatch for key '#{key}': expected Hash and got #{new_answer.class}" unless new_answer.kind_of? Hash answer ||= {} answer = Backend.merge_answer(new_answer, answer, resolution_type) else answer = new_answer break end end throw :no_such_key unless found return answer end
Private Instance Methods
file_exists?(path)
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# File lib/hiera/backend/yaml_backend.rb, line 58 def file_exists?(path) File.exist? path end