mirror of
https://github.com/inspec/inspec
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103 lines
3.2 KiB
Ruby
103 lines
3.2 KiB
Ruby
# copyright: 2015, Dominik Richter
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require "train"
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require "inspec/config"
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require "inspec/version"
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require "inspec/resource"
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require "inspec/dsl" # for method_missing_resource
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module Inspec
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class Backend
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attr_accessor :backend
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attr_accessor :profile
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# Creates a bunch of predefined resource methods based on the
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# current registry at the time. See #method_missing for what else
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# can happen.
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def self.add_resource_methods # TODO: remove
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Inspec::Resource.registry.each do |id, r|
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define_method id.to_sym do |*args|
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r.new(self, id.to_s, *args)
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end
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end
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end
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# Create the transport backend with aggregated resources.
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#
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# @param [Inspec::Config] config for the transport backend
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# @return [TransportBackend] enriched transport instance
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def self.create(config) # rubocop:disable Metrics/AbcSize
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train_credentials = config.unpack_train_credentials
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transport_name = Train.validate_backend(train_credentials)
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transport = Train.create(transport_name, train_credentials)
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if transport.nil?
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raise "Can't find transport backend '#{transport_name}'."
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end
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connection = transport.connection
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if connection.nil?
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raise "Can't connect to transport backend '#{transport_name}'."
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end
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# Set caching settings. We always want to enable caching for
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# the Mock transport for testing.
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if config[:backend_cache] || config[:backend] == :mock
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Inspec::Log.debug "Option backend_cache is enabled"
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connection.enable_cache(:file)
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connection.enable_cache(:command)
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elsif config[:debug_shell]
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Inspec::Log.debug "Option backend_cache is disabled"
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connection.disable_cache(:file)
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connection.disable_cache(:command)
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else
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Inspec::Log.debug "Option backend_cache is disabled"
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connection.disable_cache(:file)
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connection.disable_cache(:command)
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end
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Inspec::Backend.new(connection)
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rescue Train::ClientError => e
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raise "Client error, can't connect to '#{transport_name}' backend: #{e.message}"
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rescue Train::TransportError => e
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raise "Transport error, can't connect to '#{transport_name}' backend: #{e.message}"
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end
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def initialize(backend)
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self.backend = backend
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self.class.add_resource_methods
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end
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# Provide a shorthand to retrieve the inspec version from within a profile
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#
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# @return [String] inspec version
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def version
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Inspec::VERSION
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end
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# Determine whether the connection/transport is a local connection
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# Useful for resources to modify behavior as necessary, such as using
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# the Ruby stdlib for a better experience.
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def local_transport?
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return false unless defined?(Train::Transports::Local)
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backend.is_a?(Train::Transports::Local::Connection)
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end
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# Ruby internal for printing a nice name for this class
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def to_s
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"Inspec::Backend::Class"
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end
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# Ruby internal for pretty-printing a summary for this class
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def inspect
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"Inspec::Backend::Class @transport=#{backend.class}"
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end
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def method_missing(id, *args, &blk)
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Inspec::DSL.method_missing_resource(self, id, *args)
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rescue LoadError
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super
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end
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end
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end
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