first setup to protect protected branched to force updates

rebased for new code

lib/gitlab_net.rb

@@ -6,7 +6,7 @@ require_relative 'gitlab_config'
 require_relative 'gitlab_logger'
 
 class GitlabNet
-  def allowed?(cmd, repo, actor, ref, oldrev = nil, newrev = nil)
+  def allowed?(cmd, repo, actor, ref, oldrev = nil, newrev = nil, forced_push = false)
     project_name = repo.gsub("'", "")
     project_name = project_name.gsub(/\.git\Z/, "")
     project_name = project_name.gsub(/\A\//, "")

lib/gitlab_update.rb

@@ -22,12 +22,17 @@ class GitlabUpdate
     @newrev  = ARGV[2]
   end
 
+  def forced_push?
+    missed_refs = IO.popen(%W(git rev-list #{@newrev}..#{@oldrev} --)).read
+    missed_refs.split("\n").size > 0
+  end
+
   def exec
     # reset GL_ID env since we already
     # get value from it
     ENV['GL_ID'] = nil
 
-    if api.allowed?('git-receive-pack', @repo_name, @actor, @ref_name, @oldrev, @newrev)
+    if api.allowed?('git-receive-pack', @repo_name, @actor, @ref_name, @oldrev, @newrev, forced_push)
       update_redis
       exit 0
     else