Merge branch 'redhat_helper' into 'master'

Add redhat helper and adapt selinux recipe to use it.

See merge request !385

files/gitlab-cookbooks/gitlab/libraries/helper.rb

@@ -221,3 +221,49 @@ module SingleQuoteHelper
   end
 
 end
+
+class RedhatHelper
+
+  def self.system_is_rhel7?
+    platform_family == "rhel" && platform_version =~ /7\./
+  end
+
+  def self.platform_family
+    case platform
+    when /oracle/, /centos/, /redhat/, /scientific/, /enterpriseenterprise/, /amazon/, /xenserver/, /cloudlinux/, /ibm_powerkvm/, /parallels/
+      "rhel"
+    else
+      "not redhat"
+    end
+  end
+
+  def self.platform
+    contents = read_release_file
+    get_redhatish_platform(contents)
+  end
+
+  def self.platform_version
+    contents = read_release_file
+    get_redhatish_version(contents)
+  end
+
+  def self.read_release_file
+    if File.exists?("/etc/redhat-release")
+      contents = File.read("/etc/redhat-release").chomp
+    else
+      "not redhat"
+    end
+  end
+
+  # Taken from Ohai
+  # https://github.com/chef/ohai/blob/31f6415c853f3070b0399ac2eb09094eb81939d2/lib/ohai/plugins/linux/platform.rb#L23
+  def self.get_redhatish_platform(contents)
+    contents[/^Red Hat/i] ? "redhat" : contents[/(\w+)/i, 1].downcase
+  end
+
+  # Taken from Ohai
+  # https://github.com/chef/ohai/blob/31f6415c853f3070b0399ac2eb09094eb81939d2/lib/ohai/plugins/linux/platform.rb#L27
+  def self.get_redhatish_version(contents)
+    contents[/Rawhide/i] ? contents[/((\d+) \(Rawhide\))/i, 1].downcase : contents[/release ([\d\.]+)/, 1]
+  end
+end

files/gitlab-cookbooks/gitlab/recipes/selinux.rb

@@ -15,7 +15,7 @@
 # limitations under the License.
 #
 
-if node["platform_family"] == "rhel" && node["platform_version"] =~ /7\./
+if RedhatHelper.system_is_rhel7?
   ssh_keygen_module = 'gitlab-7.2.0-ssh-keygen'
   execute "semodule -i /opt/gitlab/embedded/selinux/rhel/7/#{ssh_keygen_module}.pp" do
     not_if "semodule -l | grep '^#{ssh_keygen_module}\\s'"