Add a rake task to reset all email and private tokens

changelogs/unreleased/feature-tokens-rake-task.yml

+---
+title: New rake task to reset all email and private tokens
+merge_request:
+author:

lib/tasks/tokens.rake

+require_relative '../../app/models/concerns/token_authenticatable.rb'
+
+namespace :tokens do
+  desc "Reset all GitLab user auth tokens"
+  task reset_all_auth: :environment do
+    reset_all_users_token(:reset_authentication_token!)
+  end
+
+  desc "Reset all GitLab email tokens"
+  task reset_all_email: :environment do
+    reset_all_users_token(:reset_incoming_email_token!)
+  end
+
+  def reset_all_users_token(reset_token_method)
+    TmpUser.find_in_batches do |batch|
+      puts "Processing batch starting with user ID: #{batch.first.id}"
+      STDOUT.flush
+
+      batch.each(&reset_token_method)
+    end
+  end
+end
+
+class TmpUser < ActiveRecord::Base
+  include TokenAuthenticatable
+
+  self.table_name = 'users'
+
+  def reset_authentication_token!
+    write_new_token(:authentication_token)
+    save!(validate: false)
+  end
+
+  def reset_incoming_email_token!
+    write_new_token(:incoming_email_token)
+    save!(validate: false)
+  end
+end

spec/tasks/tokens_spec.rb

+require 'rake_helper'
+
+describe 'tokens rake tasks' do
+  let!(:user) { create(:user) }
+
+  before do
+    Rake.application.rake_require 'tasks/tokens'
+  end
+
+  describe 'reset_all task' do
+    it 'invokes create_hooks task' do
+      expect { run_rake_task('tokens:reset_all_auth') }.to change { user.reload.authentication_token }
+    end
+  end
+
+  describe 'reset_all_email task' do
+    it 'invokes create_hooks task' do
+      expect { run_rake_task('tokens:reset_all_email') }.to change { user.reload.incoming_email_token }
+    end
+  end
+end