Allow specifying exclude option in a DSL

lib/miam/client.rb

@@ -2,7 +2,10 @@ class Miam::Client
   include Miam::Logger::Helper
 
   def initialize(options = {})
-    @options = {:format => :ruby}.merge(options)
+    @options = {
+      format: :ruby,
+      exclude: []
+    }.merge(options)
     aws_config = options.delete(:aws_config) || {}
     @iam = Aws::IAM::Client.new(aws_config)
     @sts = Aws::STS::Client.new(aws_config)
@@ -58,6 +61,7 @@ def apply(file)
 
   def walk(file)
     expected = load_file(file)
+    @options[:exclude] += expected[:exclude]
 
     actual, group_users, instance_profile_roles = Miam::Exporter.export(@iam, @options)
     updated = pre_walk_managed_policies(expected[:policies], actual[:policies])
@@ -539,7 +543,7 @@ def target_matched?(name)
     result = true
 
     if @options[:exclude]
-      result &&= @options[:exclude].all? {|r| name !~ r}
+      result &&= @options[:exclude].all? {|r| name !~ r }
     end
 
     if @options[:target]

lib/miam/dsl/context.rb

@@ -12,7 +12,7 @@ def self.eval(dsl, path, options = {})
   def initialize(path, options = {}, &block)
     @path = path
     @options = options
-    @result = {:users => {}, :groups => {}, :roles => {}, :instance_profiles => {}, :policies => {}}
+    @result = {:users => {}, :groups => {}, :roles => {}, :instance_profiles => {}, :policies => {}, :exclude => []}
 
     @context = Hashie::Mash.new(
       :path => path,
@@ -41,6 +41,10 @@ def require(file)
     end
   end
 
+  def exclude(pattern)
+    @result[:exclude] << pattern
+  end
+
   def user(name, user_options = {}, &block)
     name = name.to_s
 

spec/miam/exclude_spec.rb

@@ -234,4 +234,19 @@
       expect(updated).to be_falsey
     end
   end
+
+  context 'when specifying exclude option in a DSL' do
+    let(:exclude_everything) do
+      <<-RUBY
+      exclude /.*/
+      RUBY
+    end
+
+    subject { client(exclude: []) }
+
+    it do
+      updated = apply(subject) { exclude_everything }
+      expect(updated).to be_falsey
+    end
+  end
 end