Refactor to remove a special case

lib/gitlab/ci_access.rb

+module Gitlab
+  # For backwards compatibility, generic CI (which is a build without a user) is
+  # allowed to :build_download_code without any other checks.
+  class CiAccess
+    def can_do_action?(action)
+      action == :build_download_code
+    end
+  end
+end

lib/gitlab/git_access.rb

@@ -29,7 +29,11 @@ module Gitlab
       @project  = project
       @protocol = protocol
       @authentication_abilities = authentication_abilities
-      @user_access = UserAccess.new(user, project: project)
+      @user_access = if ci?
+                       CiAccess.new
+                     else
+                       UserAccess.new(user, project: project)
+                     end
     end
 
     def check(cmd, changes)
@@ -62,11 +66,6 @@ module Gitlab
       authentication_abilities.include?(:build_download_code) && user_access.can_do_action?(:build_download_code)
     end
 
-    # Allow generic CI (build without a user) for backwards compatibility
-    def ci_can_download_code?
-      authentication_abilities.include?(:build_download_code) && ci?
-    end
-
     def protocol_allowed?
       Gitlab::ProtocolAccess.allowed?(protocol)
     end
@@ -129,7 +128,6 @@ module Gitlab
       return if deploy_key?
 
       passed = user_can_download_code? ||
-        ci_can_download_code? ||
         build_can_download_code? ||
         guest_can_download_code?
 

spec/lib/gitlab/ci_access_spec.rb

+require 'spec_helper'
+
+describe Gitlab::CiAccess, lib: true do
+  let(:access) { Gitlab::CiAccess.new }
+
+  describe '#can_do_action?' do
+    context 'when action is :build_download_code' do
+      it { expect(access.can_do_action?(:build_download_code)).to be_truthy }
+    end
+
+    context 'when action is not :build_download_code' do
+      it { expect(access.can_do_action?(:download_code)).to be_falsey }
+    end
+  end
+end