Add feature flip for pull requests.

Author: roidrage

lib/travis/github/payload/pull_request.rb

@@ -15,6 +15,7 @@ def event
         end
 
         def accept?
+          return false if pull_requests_disabled?
           case action
           when :opened, :reopened then !!merge_commit
           when :synchronize       then head_change?
@@ -91,6 +92,10 @@ def merge_commit
           pull_request['merge_commit']
         end
 
+        def pull_requests_disabled?
+          Travis::Features.feature_deactivated?(:pull_requests)
+        end
+
         private
 
           def repo

spec/travis/github/payload/pull_request_spec.rb

@@ -4,6 +4,11 @@
   let(:payload) { Travis::Github::Payload.for('pull_request', GITHUB_PAYLOADS['pull-request']) }
 
   describe 'accept' do
+    before do
+      Travis::Features.start
+      Travis::Features.enable_for_all(:pull_requests)
+    end
+
     describe 'given action is "opened"' do
       before :each do
         payload.event.data['action'] = 'opened'
@@ -17,6 +22,11 @@
         payload.event.data['pull_request']['merge_commit'] = nil
         payload.should_not be_accept
       end
+
+      it "rejects when the feature is disabled" do
+        Travis::Features.disable_for_all(:pull_requests)
+        payload.accept?.should be_false
+      end
     end
 
     describe 'given action is "reopened"' do