add: sync mirror project remove pulls module

app/models/project_unit.rb

@@ -20,13 +20,16 @@ class ProjectUnit < ApplicationRecord
 
   validates :unit_type, uniqueness: { scope: :project_id}
 
-  def self.init_types(project_id)
-    ProjectUnit::unit_types.each do |_, v|
+  def self.init_types(project_id, project_type='common')
+    unit_types = project_type == 'sync_mirror' ? ProjectUnit::unit_types.except("pulls") : ProjectUnit::unit_types
+    unit_types.each do |_, v|
       self.create!(project_id: project_id, unit_type: v)
     end
   end
 
   def self.update_by_unit_types!(project, types) 
+    # 同步镜像项目不能有合并请求模块
+    types.delete("pulls") if project.sync_mirror?
     # 默认code类型自动创建
     types << "code"
     project.project_units.where.not(unit_type: types).each(&:destroy!)