Class: Chef::GuardInterpreter::ResourceGuardInterpreter

Inherits:
DefaultGuardInterpreter show all
Defined in:
lib/chef/guard_interpreter/resource_guard_interpreter.rb

Instance Method Summary collapse

Methods included from Mixin::ShellOut

apply_default_env, maybe_add_timeout, #shell_out, #shell_out!

Constructor Details

#initialize(parent_resource, command, opts) ⇒ ResourceGuardInterpreter

Returns a new instance of ResourceGuardInterpreter.



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# File 'lib/chef/guard_interpreter/resource_guard_interpreter.rb', line 25

def initialize(parent_resource, command, opts)
  super(command, opts)
  @parent_resource = parent_resource
  @resource = get_interpreter_resource(parent_resource)
end

Instance Method Details

#evaluate ⇒ Object 



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# File 'lib/chef/guard_interpreter/resource_guard_interpreter.rb', line 31

def evaluate
  # Add attributes inherited from the parent class
  # to the resource
  merge_inherited_attributes

  # Only execute and script resources and use guard attributes.
  # The command to be executed on them are passed via different attributes.
  # Script resources use code attribute and execute resources use
  # command property. Moreover script resources are also execute
  # resources. Here we make sure @command is assigned to the right
  # attribute by checking the type of the resources.
  # We need to make sure we check for Script first because any resource
  # that can get to here is an Execute resource.
  if @resource.is_a? Chef::Resource::Script
    block_attributes = @command_opts.merge({ code: @command })
  else
    block_attributes = @command_opts.merge({ command: @command })
  end

  # Handles cases like powershell_script where default
  # attributes are different when used in a guard vs. not. For
  # powershell_script in particular, this will go away when
  # the one attribue that causes this changes its default to be
  # the same after some period to prepare for deprecation
  if @resource.class.respond_to?(:get_default_attributes)
    block_attributes = @resource.class.send(:get_default_attributes, @command_opts).merge(block_attributes)
  end

  resource_block = block_from_attributes(block_attributes)
  evaluate_action(nil, &resource_block)
end