Class: RuboCop::Cop::Style::Encoding

Inherits:
Cop
  • Object
show all
Includes:
ConfigurableEnforcedStyle
Defined in:
lib/rubocop/cop/style/encoding.rb

Overview

This cop checks whether the source file has a utf-8 encoding comment or not. This check makes sense only for code that should support Ruby 1.9, since in 2.0+ utf-8 is the default source file encoding. There are two style:

when_needed - only enforce an encoding comment if there are non ASCII characters, otherwise report an offense always - enforce encoding comment in all files

Constant Summary collapse

MSG_MISSING =
'Missing utf-8 encoding comment.'
MSG_UNNECESSARY =
'Unnecessary utf-8 encoding comment.'
ENCODING_PATTERN =
/#.*coding\s?[:=]\s?(?:UTF|utf)-8/.freeze
AUTO_CORRECT_ENCODING_COMMENT =
'AutoCorrectEncodingComment'.freeze
SHEBANG =
'#!'.freeze

Constants included from Util

Util::ASGN_NODES, Util::BASIC_LITERALS, Util::EQUALS_ASGN_NODES, Util::LITERALS, Util::OPERATOR_METHODS, Util::PROC_NEW_NODE, Util::SHORTHAND_ASGN_NODES

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods included from ConfigurableEnforcedStyle

#alternative_style, #ambiguous_style_detected, #correct_style_detected, #detected_style, #detected_style=, #no_acceptable_style!, #no_acceptable_style?, #opposite_style_detected, #parameter_name, #style, #style_detected, #unexpected_style_detected

Methods inherited from Cop

#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_type, #correct, #debug?, #details, #display_cop_names?, #display_style_guide?, #excluded_file?, #extra_details?, inherited, #initialize, #join_force?, lint?, match?, #message, non_rails, qualified_cop_name, rails?, #reference_url, #relevant_file?, #style_guide_url

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, block_length, command?, comment_line?, const_name, directions, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, move_pos, numeric_range_size, on_node, operator?, parentheses?, proc?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, within_node?

Methods included from PathUtil

hidden?, issue_deprecation_warning, match_path?, relative_path

Constructor Details

This class inherits a constructor from RuboCop::Cop::Cop

Instance Method Details

#autocorrect(node) ⇒ Object


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# File 'lib/rubocop/cop/style/encoding.rb', line 35

def autocorrect(node)
  encoding = cop_config[AUTO_CORRECT_ENCODING_COMMENT]
  if encoding && encoding =~ ENCODING_PATTERN
    lambda do |corrector|
      if encoding_line_number(processed_source) == 0
        corrector.insert_before(node.pos, "#{encoding}\n")
      else
        corrector.insert_after(node.pos, "\n#{encoding}")
      end
    end
  else
    fail "#{encoding} does not match #{ENCODING_PATTERN}"
  end
end

#investigate(processed_source) ⇒ Object


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# File 'lib/rubocop/cop/style/encoding.rb', line 23

def investigate(processed_source)
  return if processed_source.buffer.source.empty?

  line_number = encoding_line_number(processed_source)
  message = offense(processed_source, line_number)

  return unless message

  range = source_range(processed_source.buffer, line_number + 1, 0)
  add_offense(processed_source.tokens.first, range, message)
end