Set up SpamAssassin

Scan incoming and outgoing email for spam. Use a local Unbound for DNS,
so we don't run into blocks for RBL queries.

cookbooks/unbound/libraries/helpers.rb

@@ -0,0 +1,59 @@
+#
+# Cookbook:: unbound
+# Library:: helpers
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+module Unbound
+  module Cookbook
+    module Helpers
+      def default_config_dir
+        return '/etc/unbound' if %i(unbound_config unbound_configure unbound_config_server).include?(declared_type)
+
+        return '/etc/unbound/unbound.conf.d' if platform?('debian', 'ubuntu')
+
+        case declared_type
+        when :unbound_config_local
+          '/etc/unbound/local.d'
+        when :unbound_config_key
+          '/etc/unbound/keys.d'
+        else
+          '/etc/unbound/conf.d'
+        end
+      end
+
+      def default_includes_dir
+        case node['platform_family']
+        when 'rhel', 'fedora'
+          %w(/etc/unbound/conf.d/*.conf /etc/unbound/local.d/*.conf)
+        when 'debian'
+          %w(/etc/unbound/unbound.conf.d/*.conf)
+        else
+          raise "Unsupported platform family #{node['platform_family']}"
+        end
+      end
+
+      def unbound_yes_no?(value)
+        case value
+        when true
+          'yes'
+        when false
+          'no'
+        when 'yes', 'YES', 'no', 'NO'
+          value.downcase
+        end
+      end
+    end
+  end
+end

cookbooks/unbound/libraries/template.rb

@@ -0,0 +1,26 @@
+#
+# Cookbook:: unbound
+# Library:: template
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+module Unbound
+  module Cookbook
+    module TemplateHelpers
+      def template_partial_indent(output, level, spaces = 2)
+        output.split("\n").each { |l| l.prepend(' ' * (level * spaces)) }.join("\n")
+      end
+    end
+  end
+end