Move Gitaly feature flag logic to Feature::Gitaly

The GitalyClient held a lot of logic which was all very tightly coupled.
In this instance the feature logic was extracted to make it do just a
little less and create a bit more focus in the GitalyClient's
responsibilies.

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/feature/gitaly.rb b/lib/feature/gitaly.rb
new file mode 100644
index 00000000000..33868e49f14
--- /dev/null
+++ b/lib/feature/gitaly.rb
@@ -0,0 +1,25 @@
+class Feature
+  class Gitaly
+    CATFILE_CACHE = 'catfile-cache'.freeze
+
+    # Server feature flags should use '_' to separate words.
+    SERVER_FEATURE_FLAGS = [CATFILE_CACHE].freeze
+
+    class << self
+      def enabled?(feature_flag)
+        Feature::FlipperFeature.table_exists? && Feature.enabled?("gitaly_#{feature_flag}")
+      rescue ActiveRecord::NoDatabaseError
+        false
+      end
+
+      def server_feature_flags
+        @server_feature_flags ||=
+          begin
+            SERVER_FEATURE_FLAGS.map do |f|
+              ["gitaly-feature-#{f.tr('_', '-')}", enabled?(f).to_s]
+            end.to_h
+          end
+      end
+    end
+  end
+end