Merge pull request rubocop#73 from koic/assert_manual_synchronized_fo…

…r_ci

Assert manual synchronized for CI

tasks/cops_documentation.rake

@@ -245,6 +245,20 @@ task generate_cops_documentation: :yard_for_generate_documentation do
  .join("\n")
  end
 
+ def assert_manual_synchronized
+ # Do not print diff and yield whether exit code was zero
+ sh('git diff --quiet manual') do |outcome, _|
+ return if outcome
+
+ # Output diff before raising error
+ sh('GIT_PAGER=cat git diff manual')
+
+ warn 'The manual directory is out of sync. ' \
+ 'Run `rake generate_cops_documentation` and commit the results.'
+ exit!
+ end
+ end
+
  def main
  cops = RuboCop::Cop::Cop.registry
  config = RuboCop::ConfigLoader.load_file('config/default.yml')
@@ -255,6 +269,8 @@ task generate_cops_documentation: :yard_for_generate_documentation do
  end
 
  print_table_of_contents(cops)
+
+ assert_manual_synchronized if ENV['CI'] == 'true'
  ensure
  RuboCop::ConfigLoader.default_configuration = nil
  end