Class: Chef::GuardInterpreter::ResourceGuardInterpreter

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

Instance Method Summary collapse

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 24

def initialize(parent_resource, command, opts)
  @command = command
  @opts = 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 38

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

  @opts.each do |attribute, value|
    @resource.send(attribute, value)
  end

  # 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
    @resource.code @command
  else
    @resource.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 attribute 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)
    @resource.class.send(:get_default_attributes).each do |attribute, value|
      @resource.send(attribute, value)
    end
  end

  begin
    # Coerce to an array to be safe. This could happen with a legacy
    # resource or something overriding the default_action code in a
    # subclass.
    Array(@resource.action).each { |action_to_run| @resource.run_action(action_to_run) }
    @resource.updated
  rescue Mixlib::ShellOut::ShellCommandFailed
    nil
  end
end

#output ⇒ Object

This class used to inherit from DefaultGuardInterpreter and it responds to #output, so leave this in for potential backwards compatibility.



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# File 'lib/chef/guard_interpreter/resource_guard_interpreter.rb', line 34

def output
  nil
end