Merge pull request #40 from richardc/json_pure_bitrot

Pin gems to support the older versions of ruby in the matrix

Gemfile

@@ -2,7 +2,12 @@
 source 'https://rubygems.org'
 
 group :development, :test do
-  gem 'rake'
+  if RUBY_VERSION =~ /^1.8\./
+    # Rake 11.0 removes support for ruby 1.8; pin to previous version.
+    gem 'rake', '~> 10.4.2'
+  else
+    gem 'rake'
+  end
   gem 'puppetlabs_spec_helper', :require => false
   gem 'puppet-lint'
 end
@@ -15,6 +20,12 @@ group :development do
   gem 'rspec-system-puppet', '~>2.0'
 end
 
+# json/json_pure are transitive dependences of puppet.
+# They dropped support for ruby 1.8 and 1.9 in their 2.0 releases
+# https://github.com/flori/json/blob/master/CHANGES.md#2015-09-11-200
+gem 'json', '~> 1.8.0', :platform => [:ruby_18, :ruby_19]
+gem 'json_pure', '~> 1.8.0', :platform => [:ruby_18, :ruby_19]
+
 if puppetversion = ENV['PUPPET_GEM_VERSION']
   gem 'puppet', puppetversion, :require => false
 else