Revert "Merge branch '291012-preparing-mr-state' into 'master'"

This reverts commit 225522e3, reversing
changes made to c4226b11.

app/models/merge_request.rb

@@ -191,12 +191,8 @@ class MergeRequest < ApplicationRecord
   end
 
   state_machine :merge_status, initial: :unchecked do
-    event :mark_as_preparing do
-      transition unchecked: :preparing
-    end
-
     event :mark_as_unchecked do
-      transition [:preparing, :can_be_merged, :checking] => :unchecked
+      transition [:can_be_merged, :checking] => :unchecked
       transition [:cannot_be_merged, :cannot_be_merged_rechecking] => :cannot_be_merged_recheck
     end
 
@@ -241,7 +237,7 @@ class MergeRequest < ApplicationRecord
   # Returns current merge_status except it returns `cannot_be_merged_rechecking` as `checking`
   # to avoid exposing unnecessary internal state
   def public_merge_status
-    cannot_be_merged_rechecking? || preparing? ? 'checking' : merge_status
+    cannot_be_merged_rechecking? ? 'checking' : merge_status
   end
 
   validates :source_project, presence: true, unless: [:allow_broken, :importing?, :closed_or_merged_without_fork?]
@@ -1058,8 +1054,6 @@ class MergeRequest < ApplicationRecord
   end
 
   def mergeable?(skip_ci_check: false, skip_discussions_check: false)
-    return false if preparing?
-
     return false unless mergeable_state?(skip_ci_check: skip_ci_check,
                                          skip_discussions_check: skip_discussions_check)
 

app/services/merge_requests/after_create_service.rb

@@ -3,13 +3,6 @@
 module MergeRequests
   class AfterCreateService < MergeRequests::BaseService
     def execute(merge_request)
-      prepare_merge_request(merge_request)
-      merge_request.mark_as_unchecked! if merge_request.preparing?
-    end
-
-    private
-
-    def prepare_merge_request(merge_request)
       event_service.open_mr(merge_request, current_user)
       merge_request_activity_counter.track_create_mr_action(user: current_user)
       notification_service.new_merge_request(merge_request, current_user)

app/services/merge_requests/create_service.rb

@@ -14,8 +14,6 @@ module MergeRequests
     end
 
     def after_create(issuable)
-      issuable.mark_as_preparing
-
       # Add new items to MergeRequests::AfterCreateService if they can
       # be performed in Sidekiq
       NewMergeRequestWorker.perform_async(issuable.id, current_user.id)

changelogs/unreleased/291012-preparing-mr-state.yml

----
-title: Implement new preparing internal merge_status
-merge_request: 54900
-author:
-type: other

ee/app/services/ee/merge_requests/after_create_service.rb

@@ -5,8 +5,8 @@ module EE
     module AfterCreateService
       extend ::Gitlab::Utils::Override
 
-      override :prepare_merge_request
-      def prepare_merge_request(merge_request)
+      override :execute
+      def execute(merge_request)
         super
 
         schedule_sync_for(merge_request.head_pipeline_id)

spec/models/merge_request_spec.rb

@@ -2885,11 +2885,6 @@ RSpec.describe MergeRequest, factory_default: :keep do
   describe '#mergeable?' do
     subject { build_stubbed(:merge_request) }
 
-    it 'returns false if still preparing' do
-      expect(subject).to receive(:preparing?) { true }
-      expect(subject.mergeable?).to be_falsey
-    end
-
     it 'returns false if #mergeable_state? is false' do
       expect(subject).to receive(:mergeable_state?) { false }
 
@@ -3080,7 +3075,6 @@ RSpec.describe MergeRequest, factory_default: :keep do
     subject { build(:merge_request, merge_status: status) }
 
     where(:status, :public_status) do
-      'preparing' | 'checking'
       'cannot_be_merged_rechecking' | 'checking'
       'checking'                    | 'checking'
       'cannot_be_merged'            | 'cannot_be_merged'
@@ -4136,13 +4130,6 @@ RSpec.describe MergeRequest, factory_default: :keep do
         include_examples 'for an valid state transition'
       end
 
-      context 'when the status is preparing' do
-        let(:merge_status) { :preparing }
-        let(:expected_merge_status) { 'unchecked' }
-
-        include_examples 'for an valid state transition'
-      end
-
       context 'when the status is can_be_merged' do
         let(:merge_status) { :can_be_merged }
         let(:expected_merge_status) { 'unchecked' }

spec/services/merge_requests/after_create_service_spec.rb

@@ -67,27 +67,5 @@ RSpec.describe MergeRequests::AfterCreateService do
     it_behaves_like 'records an onboarding progress action', :merge_request_created do
       let(:namespace) { merge_request.target_project.namespace }
     end
-
-    context 'when merge request is in unchecked state' do
-      before do
-        merge_request.mark_as_unchecked!
-        execute_service
-      end
-
-      it 'does not change its state' do
-        expect(merge_request.reload).to be_unchecked
-      end
-    end
-
-    context 'when merge request is in preparing state' do
-      before do
-        merge_request.mark_as_preparing!
-        execute_service
-      end
-
-      it 'marks the merge request as unchecked' do
-        expect(merge_request.reload).to be_unchecked
-      end
-    end
   end
 end

spec/services/merge_requests/create_service_spec.rb

@@ -67,10 +67,6 @@ RSpec.describe MergeRequests::CreateService, :clean_gitlab_redis_shared_state do
         expect(Event.where(attributes).count).to eq(1)
       end
 
-      it 'sets the merge_status to preparing' do
-        expect(merge_request.reload).to be_preparing
-      end
-
       describe 'when marked with /wip' do
         context 'in title and in description' do
           let(:opts) do