Class: Hiera::Backend::Yaml_backend

Inherits:
Object
  • Object
show all
Defined in:
lib/hiera/backend/yaml_backend.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Yaml_backend

Returns a new instance of Yaml_backend.



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# File 'lib/hiera/backend/yaml_backend.rb', line 4

def initialize
    require 'yaml'

    Hiera.debug("Hiera YAML backend starting")
end

Instance Method Details

#lookup(key, scope, order_override, resolution_type) ⇒ Object 



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# File 'lib/hiera/backend/yaml_backend.rb', line 10

def lookup(key, scope, order_override, resolution_type)
    answer = Backend.empty_answer(resolution_type)

    Hiera.debug("Looking up #{key} in YAML backend")

    Backend.datasources(scope, order_override) do |source|
        Hiera.debug("Looking for data source #{source}")

        yamlfile = Backend.datafile(:yaml, scope, source, "yaml") || next

        data = YAML.load_file(yamlfile)

        next if ! data
        next if data.empty?
        next unless data.include?(key)

        # 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)
        case resolution_type
        when :array
            raise Exception, "Hiera type mismatch: expected Array and got #{new_answer.class}" unless new_answer.kind_of? Array or new_answer.kind_of? String
            answer << new_answer
        when :hash
            raise Exception, "Hiera type mismatch: expected Hash and got #{new_answer.class}" unless new_answer.kind_of? Hash
            answer = new_answer.merge answer
        else
            answer = new_answer
            break
        end
    end

    return answer
end