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. Setting this check to “always” and “when_needed” 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 three styles:

when_needed - only enforce an encoding comment if there are non ASCII

characters, otherwise report an offense

always - enforce encoding comment in all files never - enforce no encoding comment in all files

Constant Summary collapse

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

Constants included from Util

Util::ASGN_NODES, Util::BYTE_ORDER_MARK, Util::CONDITIONAL_NODES, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::LOGICAL_OPERATOR_NODES, Util::MODIFIER_NODES, Util::OPERATOR_METHODS, 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, #alternative_styles, #ambiguous_style_detected, #correct_style_detected, #detected_style, #detected_style=, #no_acceptable_style!, #no_acceptable_style?, #opposite_style_detected, #style, #style_detected, #style_parameter_name, #supported_styles, #unexpected_style_detected

Methods inherited from Cop

#add_offense, all, autocorrect_incompatible_with, badge, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, #correct, department, #duplicate_location?, #excluded_file?, #find_location, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, non_rails, #parse, qualified_cop_name, #relevant_file?, #target_rails_version, #target_ruby_version

Methods included from AST::Sexp

#s

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search, #node_search_all, #node_search_body, #node_search_first

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, comment_line?, compatible_external_encoding_for?, directions, double_quotes_required?, effective_column, ends_its_line?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_distance, line_range, move_pos, needs_escaping?, on_node, operator?, parentheses?, parenthesized_call?, preceed?, range_between, range_by_whole_lines, range_with_surrounding_comma, range_with_surrounding_space, same_line?, scrub_string, source_range, strip_quotes, stripped_source_upto, symbol_without_quote?, to_string_literal, to_supported_styles, to_symbol_literal, within_node?

Methods included from PathUtil

absolute?, match_path?, relative_path, smart_path

Constructor Details

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

Instance Method Details

#autocorrect(range) ⇒ Object 



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

def autocorrect(range)
  if @message == MSG_MISSING
    raise encoding_mismatch_message unless matching_encoding?

    lambda do |corrector|
      corrector.insert_before(range, "#{encoding}\n")
    end
  else
    # Need to remove unnecessary encoding comment
    lambda do |corrector|
      corrector.remove(range_with_surrounding_space(range, :right))
    end
  end
end

#investigate(processed_source) ⇒ Object 



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# File 'lib/rubocop/cop/style/encoding.rb', line 25

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

  line_number = encoding_line_number(processed_source)
  return unless (@message = offense(processed_source, line_number))

  range = processed_source.buffer.line_range(line_number + 1)
  add_offense(range, range, @message)
end