RUBY-2202 Deprecate geoHaystack and geoSearch (#1878)

Co-authored-by: Oleg Pudeyev <oleg@bsdpower.com>

lib/mongo/index.rb

@@ -49,6 +49,7 @@ module Index
     # Specify a geoHaystack index.
     #
     # @since 2.0.0
+    # @deprecated
     GEOHAYSTACK = 'geoHaystack'.freeze
 
     # Encodes a text index.

lib/mongo/index/view.rb

@@ -151,8 +151,14 @@ def create_one(keys, options = {})
       def create_many(*models)
         client.send(:with_session, @options) do |session|
           server = next_primary(nil, session)
+          indexes = normalize_models(models.flatten, server)
+          indexes.each do |index|
+            if index[:bucketSize] || index['bucketSize']
+              client.log_warn("Haystack indexes (bucketSize index option) are deprecated as of MongoDB 4.4")
+            end
+          end
           spec = {
-                  indexes: normalize_models(models.flatten, server),
+                  indexes: indexes,
                   db_name: database.name,
                   coll_name: collection.name,
                   session: session

spec/mongo/index/view_spec.rb

@@ -505,6 +505,25 @@
         end
       end
     end
+
+    context 'when using bucket option' do
+
+      let(:spec) do
+        { 'any' => 1 }
+      end
+
+      let(:result) do
+        view.create_many([key: spec, bucket_size: 1])
+      end
+
+      it 'warns of deprecation' do
+        RSpec::Mocks.with_temporary_scope do
+          view.client.should receive(:log_warn).and_call_original
+
+          result
+        end
+      end
+    end
   end
 
   describe '#create_one' do
@@ -592,6 +611,25 @@
           expect(result).to be_successful
         end
       end
+
+      context 'when using bucket option' do
+
+        let(:spec) do
+          { 'any' => 1 }
+        end
+
+        let(:result) do
+          view.create_one(spec, bucket_size: 1)
+        end
+
+        it 'warns of deprecation' do
+          RSpec::Mocks.with_temporary_scope do
+            view.client.should receive(:log_warn).and_call_original
+
+            result
+          end
+        end
+      end
     end
 
     context 'when index creation fails' do