1 files changed, 21 insertions, 0 deletions
diff --git a/app/graphql/resolvers/projects/fork_details_resolver.rb b/app/graphql/resolvers/projects/fork_details_resolver.rb
new file mode 100644
index 00000000000..fcc13a1bc1e
--- /dev/null
+++ b/app/graphql/resolvers/projects/fork_details_resolver.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+module Resolvers
+  module Projects
+    class ForkDetailsResolver < BaseResolver
+      type Types::Projects::ForkDetailsType, null: true
+
+      argument :ref, GraphQL::Types::String,
+               required: false,
+               description: 'Ref of the fork. Default value is HEAD.'
+
+      alias_method :project, :object
+
+      def resolve(**args)
+        return unless project.forked?
+
+        ::Projects::Forks::DivergenceCounts.new(project, args[:ref]).counts
+      end
+    end
+  end
+end