tidy up requires

It's really ugly to have to keep repeating File.dirname(__FILE__),
so we use a temporary variable, even in the case of a single require.
This minimises long "requires" lines and "requires" statements with
needing line-breaks, and should make search-and-replace a bit easier
if we later want to migrate to __dir__ (Ruby >= 2.0) or require_relative.

  http://stackoverflow.com/questions/4333286/ruby-require-vs-require-relative-best-practice-to-workaround-running-in-both

I've deliberately rejected the pattern:

  require File.expand_path('../relative/path', __FILE__)

because it relies on inconsistent semantics and inconsistent
documentation in File.expand_path:

  http://stackoverflow.com/questions/4333286/ruby-require-vs-require-relative-best-practice-to-workaround-running-in-both#comment34147297_4333552

libraries/chef/mixin/pacemaker.rb

@@ -1,2 +1,3 @@
-require File.expand_path('pacemaker/standard_cib_object.rb', File.dirname(__FILE__))
-require File.expand_path('pacemaker/runnable_resource.rb',   File.dirname(__FILE__))
+this_dir = File.dirname(__FILE__)
+require File.expand_path('pacemaker/standard_cib_object.rb', this_dir)
+require File.expand_path('pacemaker/runnable_resource.rb',   this_dir)

libraries/chef/mixin/pacemaker/runnable_resource.rb

@@ -1,4 +1,4 @@
-require ::File.expand_path('standard_cib_object', ::File.dirname(__FILE__))
+require ::File.expand_path('standard_cib_object', File.dirname(__FILE__))
 
 # Common code used by Pacemaker LWRP providers for resources supporting
 # the :run action.

libraries/chef/mixin/pacemaker/standard_cib_object.rb

@@ -1,5 +1,5 @@
 require ::File.expand_path('../../../pacemaker/cib_object',
-                           ::File.dirname(__FILE__))
+                           File.dirname(__FILE__))
 
 # Common code used by Pacemaker LWRP providers
 

libraries/pacemaker/resource/clone.rb

@@ -1,5 +1,6 @@
-require File.expand_path('../resource', File.dirname(__FILE__))
-require File.expand_path('../mixins/resource_meta', File.dirname(__FILE__))
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../resource', this_dir)
+require File.expand_path('../mixins/resource_meta', this_dir)
 
 class Pacemaker::Resource::Clone < Pacemaker::Resource
   TYPE = 'clone'

libraries/pacemaker/resource/group.rb

@@ -1,5 +1,6 @@
-require File.expand_path('../resource', File.dirname(__FILE__))
-require File.expand_path('../mixins/resource_meta', File.dirname(__FILE__))
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../resource', this_dir)
+require File.expand_path('../mixins/resource_meta', this_dir)
 
 class Pacemaker::Resource::Group < Pacemaker::Resource
   TYPE = 'group'

libraries/pacemaker/resource/primitive.rb

@@ -1,6 +1,8 @@
 require 'shellwords'
-require File.expand_path('../resource', File.dirname(__FILE__))
-require File.expand_path('../mixins/resource_meta', File.dirname(__FILE__))
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../resource', this_dir)
+require File.expand_path('../mixins/resource_meta', this_dir)
 
 class Pacemaker::Resource::Primitive < Pacemaker::Resource
   TYPE = 'primitive'

providers/clone.rb

@@ -17,9 +17,9 @@
 # limitations under the License.
 #
 
-require ::File.expand_path('../libraries/pacemaker', ::File.dirname(__FILE__))
-require ::File.expand_path('../libraries/chef/mixin/pacemaker',
-                           ::File.dirname(__FILE__))
+this_dir = ::File.dirname(__FILE__)
+require ::File.expand_path('../libraries/pacemaker', this_dir)
+require ::File.expand_path('../libraries/chef/mixin/pacemaker', this_dir)
 
 include Chef::Mixin::Pacemaker::RunnableResource
 

providers/colocation.rb

@@ -17,9 +17,9 @@
 # limitations under the License.
 #
 
-require ::File.expand_path('../libraries/pacemaker', ::File.dirname(__FILE__))
-require ::File.expand_path('../libraries/chef/mixin/pacemaker',
-                           ::File.dirname(__FILE__))
+this_dir = ::File.dirname(__FILE__)
+require ::File.expand_path('../libraries/pacemaker', this_dir)
+require ::File.expand_path('../libraries/chef/mixin/pacemaker', this_dir)
 
 include Chef::Mixin::Pacemaker::StandardCIBObject
 

providers/group.rb

@@ -16,9 +16,9 @@
 # limitations under the License.
 #
 
-require ::File.expand_path('../libraries/pacemaker', ::File.dirname(__FILE__))
-require ::File.expand_path('../libraries/chef/mixin/pacemaker',
-                           ::File.dirname(__FILE__))
+this_dir = ::File.dirname(__FILE__)
+require ::File.expand_path('../libraries/pacemaker', this_dir)
+require ::File.expand_path('../libraries/chef/mixin/pacemaker', this_dir)
 
 include Chef::Mixin::Pacemaker::RunnableResource
 

providers/location.rb

@@ -17,9 +17,9 @@
 # limitations under the License.
 #
 
-require ::File.expand_path('../libraries/pacemaker', ::File.dirname(__FILE__))
-require ::File.expand_path('../libraries/chef/mixin/pacemaker',
-                           ::File.dirname(__FILE__))
+this_dir = ::File.dirname(__FILE__)
+require ::File.expand_path('../libraries/pacemaker', this_dir)
+require ::File.expand_path('../libraries/chef/mixin/pacemaker', this_dir)
 
 include Chef::Mixin::Pacemaker::StandardCIBObject
 

providers/ms.rb

@@ -17,9 +17,9 @@
 # limitations under the License.
 #
 
-require ::File.expand_path('../libraries/pacemaker', ::File.dirname(__FILE__))
-require ::File.expand_path('../libraries/chef/mixin/pacemaker',
-                           ::File.dirname(__FILE__))
+this_dir = ::File.dirname(__FILE__)
+require ::File.expand_path('../libraries/pacemaker', this_dir)
+require ::File.expand_path('../libraries/chef/mixin/pacemaker', this_dir)
 
 include Chef::Mixin::Pacemaker::RunnableResource
 

providers/primitive.rb

@@ -17,9 +17,9 @@
 # limitations under the License.
 #
 
-require ::File.expand_path('../libraries/pacemaker', ::File.dirname(__FILE__))
-require ::File.expand_path('../libraries/chef/mixin/pacemaker',
-                           ::File.dirname(__FILE__))
+this_dir = ::File.dirname(__FILE__)
+require ::File.expand_path('../libraries/pacemaker', this_dir)
+require ::File.expand_path('../libraries/chef/mixin/pacemaker', this_dir)
 
 include Chef::Mixin::Pacemaker::RunnableResource
 

providers/property.rb

@@ -17,8 +17,8 @@
 # limitations under the License.
 #
 
-require ::File.expand_path('../libraries/pacemaker/cib_object',
-                           ::File.dirname(__FILE__))
+this_dir = ::File.dirname(__FILE__)
+require ::File.expand_path('../libraries/pacemaker/cib_object', this_dir)
 
 action :create do
   name = new_resource.name

spec/fixtures/colocation_constraint.rb

@@ -1,5 +1,5 @@
 require ::File.expand_path('../../libraries/pacemaker/constraint/colocation',
-                           ::File.dirname(__FILE__))
+                           File.dirname(__FILE__))
 
 module Chef::RSpec
   module Pacemaker

spec/fixtures/keystone_primitive.rb

@@ -1,5 +1,5 @@
 require ::File.expand_path('../../libraries/pacemaker/resource/primitive',
-                           ::File.dirname(__FILE__))
+                           File.dirname(__FILE__))
 
 module Chef::RSpec
   module Pacemaker

spec/fixtures/location_constraint.rb

@@ -1,5 +1,5 @@
 require ::File.expand_path('../../libraries/pacemaker/constraint/location',
-                           ::File.dirname(__FILE__))
+                           File.dirname(__FILE__))
 
 module Chef::RSpec
   module Pacemaker

spec/helpers/cib_object.rb

@@ -2,8 +2,8 @@
 
 require 'mixlib/shellout'
 
-require File.expand_path('../../libraries/pacemaker/cib_object',
-                         File.dirname(__FILE__))
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../../libraries/pacemaker/cib_object', this_dir)
 
 module Chef::RSpec
   module Pacemaker

spec/helpers/provider.rb

@@ -1,6 +1,7 @@
 # Shared code used to test providers of CIB objects
 
-require File.expand_path('../helpers/cib_object', File.dirname(__FILE__))
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/cib_object', this_dir)
 
 shared_context "a Pacemaker LWRP" do
   before(:each) do

spec/helpers/runnable_resource.rb

@@ -3,7 +3,8 @@
 # for primitives is runnable (since primitives can be started
 # and stopped) but constraints cannot.
 
-require File.expand_path('../helpers/provider', File.dirname(__FILE__))
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/provider', this_dir)
 
 shared_examples "a runnable resource" do |fixture|
   def expect_running(running)

spec/libraries/pacemaker/cib_object_spec.rb

@@ -1,8 +1,10 @@
-require 'spec_helper'
 require 'mixlib/shellout'
 
-require File.expand_path('../../../libraries/pacemaker', File.dirname(__FILE__))
-require File.expand_path('../../fixtures/keystone_primitive', File.dirname(__FILE__))
+require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../../../libraries/pacemaker', this_dir)
+require File.expand_path('../../fixtures/keystone_primitive', this_dir)
 
 describe Pacemaker::CIBObject do
 

spec/libraries/pacemaker/constraint/colocation_spec.rb

@@ -1,8 +1,10 @@
 require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
 require File.expand_path('../../../../libraries/pacemaker/constraint/colocation',
-                         File.dirname(__FILE__))
-require File.expand_path('../../../fixtures/colocation_constraint', File.dirname(__FILE__))
-require File.expand_path('../../../helpers/cib_object', File.dirname(__FILE__))
+                         this_dir)
+require File.expand_path('../../../fixtures/colocation_constraint', this_dir)
+require File.expand_path('../../../helpers/cib_object', this_dir)
 
 describe Pacemaker::Constraint::Colocation do
   let(:fixture) { Chef::RSpec::Pacemaker::Config::COLOCATION_CONSTRAINT.dup }

spec/libraries/pacemaker/constraint/location_spec.rb

@@ -1,8 +1,10 @@
 require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
 require File.expand_path('../../../../libraries/pacemaker/constraint/location',
-                         File.dirname(__FILE__))
-require File.expand_path('../../../fixtures/location_constraint', File.dirname(__FILE__))
-require File.expand_path('../../../helpers/cib_object', File.dirname(__FILE__))
+                         this_dir)
+require File.expand_path('../../../fixtures/location_constraint', this_dir)
+require File.expand_path('../../../helpers/cib_object', this_dir)
 
 describe Pacemaker::Constraint::Location do
   let(:fixture) { Chef::RSpec::Pacemaker::Config::LOCATION_CONSTRAINT.dup }

spec/libraries/pacemaker/resource/clone_spec.rb

@@ -1,10 +1,10 @@
 require 'spec_helper'
-require File.expand_path('../../../../libraries/pacemaker/resource/clone',
-                         File.dirname(__FILE__))
-require File.expand_path('../../../fixtures/clone_resource', File.dirname(__FILE__))
-require File.expand_path('../../../helpers/cib_object', File.dirname(__FILE__))
-require File.expand_path('../../../helpers/meta_examples',
-                         File.dirname(__FILE__))
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../../../../libraries/pacemaker/resource/clone', this_dir)
+require File.expand_path('../../../fixtures/clone_resource', this_dir)
+require File.expand_path('../../../helpers/cib_object', this_dir)
+require File.expand_path('../../../helpers/meta_examples', this_dir)
 
 describe Pacemaker::Resource::Clone do
   let(:fixture) { Chef::RSpec::Pacemaker::Config::CLONE_RESOURCE.dup }

spec/libraries/pacemaker/resource/group_spec.rb

@@ -1,4 +1,5 @@
 require 'spec_helper'
+
 require File.expand_path('../../../../libraries/pacemaker/resource/group',
                          File.dirname(__FILE__))
 require File.expand_path('../../../fixtures/resource_group', File.dirname(__FILE__))

spec/libraries/pacemaker/resource/ms_spec.rb

@@ -1,10 +1,10 @@
 require 'spec_helper'
-require File.expand_path('../../../../libraries/pacemaker/resource/ms',
-                         File.dirname(__FILE__))
-require File.expand_path('../../../fixtures/ms_resource', File.dirname(__FILE__))
-require File.expand_path('../../../helpers/cib_object', File.dirname(__FILE__))
-require File.expand_path('../../../helpers/meta_examples',
-                         File.dirname(__FILE__))
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../../../../libraries/pacemaker/resource/ms', this_dir)
+require File.expand_path('../../../fixtures/ms_resource', this_dir)
+require File.expand_path('../../../helpers/cib_object', this_dir)
+require File.expand_path('../../../helpers/meta_examples', this_dir)
 
 describe Pacemaker::Resource::MasterSlave do
   let(:fixture) { Chef::RSpec::Pacemaker::Config::MS_RESOURCE.dup }

spec/libraries/pacemaker/resource/primitive_spec.rb

@@ -1,12 +1,11 @@
 require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
 require File.expand_path('../../../../libraries/pacemaker/resource/primitive',
-                         File.dirname(__FILE__))
-require File.expand_path('../../../fixtures/keystone_primitive',
-                         File.dirname(__FILE__))
-require File.expand_path('../../../helpers/cib_object',
-                         File.dirname(__FILE__))
-require File.expand_path('../../../helpers/meta_examples',
-                         File.dirname(__FILE__))
+                         this_dir)
+require File.expand_path('../../../fixtures/keystone_primitive', this_dir)
+require File.expand_path('../../../helpers/cib_object', this_dir)
+require File.expand_path('../../../helpers/meta_examples', this_dir)
 
 describe Pacemaker::Resource::Primitive do
   let(:fixture) { Chef::RSpec::Pacemaker::Config::KEYSTONE_PRIMITIVE.dup }

spec/libraries/pacemaker/resource_spec.rb

@@ -1,8 +1,8 @@
 require 'spec_helper'
-require File.expand_path('../../../libraries/pacemaker/resource',
-                         File.dirname(__FILE__))
-require File.expand_path('../../fixtures/keystone_primitive',
-                         File.dirname(__FILE__))
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../../../libraries/pacemaker/resource', this_dir)
+require File.expand_path('../../fixtures/keystone_primitive', this_dir)
 
 describe Pacemaker::Resource do
   describe "#running?" do

spec/providers/clone_spec.rb

@@ -1,6 +1,8 @@
-require File.expand_path('../spec_helper', File.dirname(__FILE__))
-require File.expand_path('../helpers/runnable_resource', File.dirname(__FILE__))
-require File.expand_path('../fixtures/clone_resource', File.dirname(__FILE__))
+require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/runnable_resource', this_dir)
+require File.expand_path('../fixtures/clone_resource',   this_dir)
 
 describe "Chef::Provider::PacemakerClone" do
   # for use inside examples:

spec/providers/colocation_spec.rb

@@ -1,6 +1,8 @@
-require File.expand_path('../spec_helper', File.dirname(__FILE__))
-require File.expand_path('../helpers/provider', File.dirname(__FILE__))
-require File.expand_path('../fixtures/colocation_constraint', File.dirname(__FILE__))
+require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/provider', this_dir)
+require File.expand_path('../fixtures/colocation_constraint', this_dir)
 
 describe "Chef::Provider::PacemakerColocation" do
   # for use inside examples:

spec/providers/group_spec.rb

@@ -1,6 +1,8 @@
-require File.expand_path('../spec_helper', File.dirname(__FILE__))
-require File.expand_path('../helpers/runnable_resource', File.dirname(__FILE__))
-require File.expand_path('../fixtures/resource_group', File.dirname(__FILE__))
+require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/runnable_resource', this_dir)
+require File.expand_path('../fixtures/resource_group', this_dir)
 
 describe "Chef::Provider::PacemakerGroup" do
   # for use inside examples:

spec/providers/location_spec.rb

@@ -1,6 +1,8 @@
-require File.expand_path('../spec_helper', File.dirname(__FILE__))
-require File.expand_path('../helpers/provider', File.dirname(__FILE__))
-require File.expand_path('../fixtures/location_constraint', File.dirname(__FILE__))
+require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/provider', this_dir)
+require File.expand_path('../fixtures/location_constraint', this_dir)
 
 describe "Chef::Provider::PacemakerLocation" do
   # for use inside examples:

spec/providers/ms_spec.rb

@@ -1,6 +1,8 @@
-require File.expand_path('../spec_helper', File.dirname(__FILE__))
-require File.expand_path('../helpers/runnable_resource', File.dirname(__FILE__))
-require File.expand_path('../fixtures/ms_resource', File.dirname(__FILE__))
+require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/runnable_resource', this_dir)
+require File.expand_path('../fixtures/ms_resource', this_dir)
 
 describe "Chef::Provider::PacemakerMs" do
   # for use inside examples:

spec/providers/primitive_spec.rb

@@ -1,6 +1,8 @@
-require File.expand_path('../spec_helper', File.dirname(__FILE__))
-require File.expand_path('../helpers/runnable_resource', File.dirname(__FILE__))
-require File.expand_path('../fixtures/keystone_primitive', File.dirname(__FILE__))
+require 'spec_helper'
+
+this_dir = File.dirname(__FILE__)
+require File.expand_path('../helpers/runnable_resource', this_dir)
+require File.expand_path('../fixtures/keystone_primitive', this_dir)
 
 describe "Chef::Provider::PacemakerPrimitive" do
   # for use inside examples: