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path: root/app/workers/stuck_merge_jobs_worker.rb
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# frozen_string_literal: true

class StuckMergeJobsWorker
  include ApplicationWorker
  include CronjobQueue

  def self.logger
    Rails.logger # rubocop:disable Gitlab/RailsLogger
  end

  # rubocop: disable CodeReuse/ActiveRecord
  def perform
    stuck_merge_requests.find_in_batches(batch_size: 100) do |group|
      jids = group.map(&:merge_jid)

      # Find the jobs that aren't currently running or that exceeded the threshold.
      completed_jids = Gitlab::SidekiqStatus.completed_jids(jids)

      if completed_jids.any?
        completed_ids = group.select { |merge_request| completed_jids.include?(merge_request.merge_jid) }.map(&:id)

        apply_current_state!(completed_jids, completed_ids)
      end
    end
  end
  # rubocop: enable CodeReuse/ActiveRecord

  private

  # rubocop: disable CodeReuse/ActiveRecord
  def apply_current_state!(completed_jids, completed_ids)
    merge_requests = MergeRequest.where(id: completed_ids)

    merge_requests.where.not(merge_commit_sha: nil).update_all(state: :merged)

    merge_requests_to_reopen = merge_requests.where(merge_commit_sha: nil)

    # Do not reopen merge requests using direct queries.
    # We rely on state machine callbacks to update head_pipeline_id
    merge_requests_to_reopen.each(&:unlock_mr)

    self.class.logger.info("Updated state of locked merge jobs. JIDs: #{completed_jids.join(', ')}")
  end
  # rubocop: enable CodeReuse/ActiveRecord

  # rubocop: disable CodeReuse/ActiveRecord
  def stuck_merge_requests
    MergeRequest.select('id, merge_jid').with_state(:locked).where.not(merge_jid: nil).reorder(nil)
  end
  # rubocop: enable CodeReuse/ActiveRecord
end