Add Gemfile and puppet 4 checks

In anticipation of puppet 4, start trying to deal with puppet 4 things
that can be helpfully predicted by puppet lint plugins. Also fix lint
errors caught by the puppet-lint-empty_string-check gem and arrow
alignment errors now caught by the newer puppet-lint gem.

Change-Id: I20f0be5d20ad76ba51036089ef50675822d3b4c1

.gitignore

@@ -0,0 +1,2 @@
+Gemfile.lock
+.bundled_gems/

Gemfile

@@ -0,0 +1,30 @@
+source 'https://rubygems.org'
+
+group :development, :test do
+  gem 'puppetlabs_spec_helper', :require => false
+
+  gem 'metadata-json-lint'
+  # This is nice and all, but let's not worry about it until we've actually
+  # got puppet 4.x sorted
+  # gem 'puppet-lint-param-docs'
+  gem 'puppet-lint-absolute_classname-check'
+  gem 'puppet-lint-absolute_template_path'
+  gem 'puppet-lint-trailing_newline-check'
+
+  # Puppet 4.x related lint checks
+  gem 'puppet-lint-unquoted_string-check'
+  gem 'puppet-lint-empty_string-check'
+  gem 'puppet-lint-leading_zero-check'
+  gem 'puppet-lint-variable_contains_upcase'
+  gem 'puppet-lint-spaceship_operator_without_tag-check'
+  gem 'puppet-lint-undef_in_function-check'
+
+  if puppetversion = ENV['PUPPET_GEM_VERSION']
+    gem 'puppet', puppetversion, :require => false
+  else
+    gem 'puppet', '~> 3.0', :require => false
+  end
+
+end
+
+# vim:ft=ruby

manifests/init.pp

@@ -19,7 +19,7 @@
 class redis(
   $redis_port = '6379',
   $redis_bind = '127.0.0.1',
-  $redis_password = '',
+  $redis_password = undef,
   $redis_max_memory = '1gb',
   $redis_max_memory_policy = 'allkeys-lru',
   $version = '2.2.12',
@@ -58,9 +58,9 @@ class redis(
     }
 
     service { 'redis-server':
-      ensure     => running,
-      require    => Package['redis-server'],
-      subscribe  => File['/etc/redis/redis.conf'],
+      ensure    => running,
+      require   => Package['redis-server'],
+      subscribe => File['/etc/redis/redis.conf'],
     }
 
 }

templates/redis.2.2.conf.erb

@@ -147,7 +147,7 @@ slave-serve-stale-data yes
 # 150k passwords per second against a good box. This means that you should
 # use a very strong password otherwise it will be very easy to break.
 #
-<% if @redis_password != "" %>
+<% if @redis_password != nil %>
 requirepass <%= @redis_password %>
 <% end %>
 

templates/redis.2.4.conf.erb

@@ -178,7 +178,7 @@ slave-priority 100
 # 150k passwords per second against a good box. This means that you should
 # use a very strong password otherwise it will be very easy to break.
 #
-<% if @redis_password != "" %>
+<% if @redis_password != nil %>
 requirepass <%= @redis_password %>
 <% end %>
 

templates/redis.2.6.conf.erb

@@ -255,7 +255,7 @@ slave-priority 100
 # 150k passwords per second against a good box. This means that you should
 # use a very strong password otherwise it will be very easy to break.
 #
-<% if @redis_password != "" %>
+<% if @redis_password != nil %>
 requirepass <%= @redis_password %>
 <% end %>
 

templates/redis.2.8.conf.erb

@@ -328,7 +328,7 @@ slave-priority 100
 # use a very strong password otherwise it will be very easy to break.
 #
 # requirepass foobared
-<% if @redis_password != "" %>
+<% if @redis_password != nil %>
 requirepass <%= @redis_password %>
 <% end %>