Add metadata about the GitLab server to GraphQL

4 files changed, 34 insertions, 1 deletions

diff --git a/app/graphql/resolvers/metadata_resolver.rb b/app/graphql/resolvers/metadata_resolver.rb
new file mode 100644
index 00000000000..3a79e6434fb
--- /dev/null
+++ b/app/graphql/resolvers/metadata_resolver.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Resolvers
+  class MetadataResolver < BaseResolver
+    type Types::MetadataType, null: false
+
+    def resolve(**args)
+      { version: Gitlab::VERSION, revision: Gitlab.revision }
+    end
+  end
+end
diff --git a/app/graphql/types/metadata_type.rb b/app/graphql/types/metadata_type.rb
new file mode 100644
index 00000000000..2d8bad0614b
--- /dev/null
+++ b/app/graphql/types/metadata_type.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+module Types
+  class MetadataType < ::Types::BaseObject
+    graphql_name 'Metadata'
+
+    field :version, GraphQL::STRING_TYPE, null: false
+    field :revision, GraphQL::STRING_TYPE, null: false
+  end
+end
diff --git a/app/graphql/types/query_type.rb b/app/graphql/types/query_type.rb
index 954bcc0a5a3..472fe5d6ec2 100644
--- a/app/graphql/types/query_type.rb
+++ b/app/graphql/types/query_type.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module Types
-  class QueryType < BaseObject
+  class QueryType < ::Types::BaseObject
     graphql_name 'Query'
 
     field :project, Types::ProjectType,
@@ -10,6 +10,14 @@ module Types
           description: "Find a project",
           authorize: :read_project
 
+    field :metadata, Types::MetadataType,
+          null: true,
+          resolver: Resolvers::MetadataResolver,
+          description: 'Metadata about GitLab' do |*args|
+
+      authorize :read_instance_metadata
+    end
+
     field :echo, GraphQL::STRING_TYPE, null: false, function: Functions::Echo.new
   end
 end
diff --git a/app/policies/global_policy.rb b/app/policies/global_policy.rb
index 16c58730878..d412a591fdc 100644
--- a/app/policies/global_policy.rb
+++ b/app/policies/global_policy.rb
@@ -68,6 +68,10 @@ class GlobalPolicy < BasePolicy
     enable :read_users_list
   end
 
+  rule { ~anonymous }.policy do
+    enable :read_instance_metadata
+  end
+
   rule { admin }.policy do
     enable :read_custom_attribute
     enable :update_custom_attribute