Install yum-epel when necessary

Otherwise this cookbook doesn't work on older RHEL systems

.kitchen.yml

@@ -6,11 +6,7 @@ provisioner:
 
 platforms:
   - name: centos-5.11
-    run_list:
-    - recipe[yum-epel]
   - name: centos-6.7
-    run_list:
-    - recipe[yum-epel]
   - name: centos-7.2
   - name: debian-7.9
     run_list: apt::default

Berksfile

@@ -5,7 +5,6 @@ metadata
 group :integration do
   cookbook 'apt'
   cookbook 'yum'
-  cookbook 'yum-epel'
 end
 
 cookbook 'runit_test', path: 'test/cookbooks/runit_test'

README.md

@@ -26,6 +26,7 @@ Requirements
 
 #### Cookbooks
 - packagecloud (for RHEL)
+- yum-epel (for RHEL)
 
 Attributes
 ----------

metadata.rb

@@ -13,6 +13,7 @@ recipe 'runit', 'Installs and configures runit'
 end
 
 depends 'packagecloud'
+depends 'yum-epel'
 
 source_url 'https://github.com/hw-cookbooks/runit' if respond_to?(:source_url)
 issues_url 'https://github.com/hw-cookbooks/runit/issues' if respond_to?(:issues_url)

recipes/default.rb

@@ -39,7 +39,13 @@ end
 case node['platform_family']
 when 'rhel', 'fedora'
 
-  packagecloud_repo 'imeyer/runit' unless node['runit']['prefer_local_yum']
+  # add the necessary repos unless prefer_local_yum is set
+  unless node['runit']['prefer_local_yum']
+    include_recipe 'yum-epel' if node['platform_version'].to_i < 7
+
+    packagecloud_repo 'imeyer/runit' 
+  end
+  
   package 'runit'
 
   service 'runsvdir-start' do