Module: Chef::Util::DSC::LocalConfigurationManager::Parser

Defined in:
lib/chef/util/dsc/lcm_output_parser.rb

Class Method Summary collapse

Class Method Details

.parse(lcm_output, test_dsc_configuration) ⇒ Object

Parses the output from LCM and returns a list of Chef::Util::DSC::ResourceInfo objects that describe how the resources affected the system

Example for WhatIfParser: parse <<-EOF What if: [Machine]: LCM: [Start Set ] What if: [Machine]: LCM: [Start Resource ] [[File]FileToNotBeThere] What if: [Machine]: LCM: [Start Set ] [[File]FileToNotBeThere] What if: [C:\ShouldNotExist.txt] removed What if: [Machine]: LCM: [End Set ] [[File]FileToNotBeThere] in 0.1 seconds What if: [Machine]: LCM: [End Resource ] [[File]FileToNotBeThere] What if: [Machine]: LCM: [End Set ] EOF

would return

[ Chef::Util::DSC::ResourceInfo.new( '[[File]FileToNotBeThere]', true, [ '[[File]FileToNotBeThere]', '[C:\Shouldnotexist.txt]', '[[File]FileToNotBeThere] in 0.1 seconds' ] ) ]

Example for TestDSCParser: parse <<-EOF InDesiredState : False ResourcesInDesiredState : ResourcesNotInDesiredState: [Environment]texteditor ReturnValue : 0 PSComputerName : . EOF

would return

[ Chef::Util::DSC::ResourceInfo.new( '[Environment]texteditor', true, [ ] ) ]


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# File 'lib/chef/util/dsc/lcm_output_parser.rb', line 77

def self.parse(lcm_output, test_dsc_configuration)
  test_dsc_configuration ? test_dsc_parser(lcm_output) : what_if_parser(lcm_output)
end

.test_dsc_parser(lcm_output) ⇒ Object


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# File 'lib/chef/util/dsc/lcm_output_parser.rb', line 81

def self.test_dsc_parser(lcm_output)
  lcm_output ||= ""
  current_resource = {}

  resources = []
  lcm_output.lines.each do |line|
    op_action , op_value = line.strip.split(":")
    op_action&.strip!
    case op_action
    when "InDesiredState"
      current_resource[:skipped] = op_value.strip == "True" ? true : false
    when "ResourcesInDesiredState"
      current_resource[:name] = op_value.strip if op_value
    when "ResourcesNotInDesiredState"
      current_resource[:name] = op_value.strip if op_value
    when "ReturnValue"
      current_resource[:context] = nil
    end
  end
  if current_resource[:name]
    resources.push(current_resource)
  end

  if resources.length > 0
    build_resource_info(resources)
  else
    raise Chef::Exceptions::LCMParser, "Could not parse:\n#{lcm_output}"
  end
end

.what_if_parser(lcm_output) ⇒ Object


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# File 'lib/chef/util/dsc/lcm_output_parser.rb', line 111

def self.what_if_parser(lcm_output)
  lcm_output ||= ""
  current_resource = {}

  resources = []
  lcm_output.lines.each do |line|
    op_action, op_type, info = parse_line(line)

    case op_action
    when :start
      case op_type
      when :set
        if current_resource[:name]
          current_resource[:context] = :logging
          current_resource[:logs] = [info]
        end
      when :resource
        if current_resource[:name]
          resources.push(current_resource)
        end
        current_resource = { name: info }
      else
        Chef::Log.trace("Ignoring op_action #{op_action}: Read line #{line}")
      end
    when :end
      # Make sure we log the last line
      if current_resource[:context] == :logging && info.include?(current_resource[:name])
        current_resource[:logs].push(info)
      end
      current_resource[:context] = nil
    when :skip
      current_resource[:skipped] = true
    when :info
      if current_resource[:context] == :logging
        current_resource[:logs].push(info)
      end
    end
  end

  if current_resource[:name]
    resources.push(current_resource)
  end

  if resources.length > 0
    build_resource_info(resources)
  else
    raise Chef::Exceptions::LCMParser, "Could not parse:\n#{lcm_output}"
  end
end