Class: RuboCop::Cop::Layout::EndOfLine

Inherits:
Cop
  • Object
show all
Includes:
ConfigurableEnforcedStyle, RangeHelp
Defined in:
lib/rubocop/cop/layout/end_of_line.rb

Overview

This cop checks for Windows-style line endings in the source code.

Examples:

EnforcedStyle: native (default)

# The `native` style means that CR+LF (Carriage Return + Line Feed) is
# enforced on Windows, and LF is enforced on other platforms.

# bad
puts 'Hello' # Return character is LF on Windows.
puts 'Hello' # Return character is CR+LF on other than Windows.

# good
puts 'Hello' # Return character is CR+LF on Windows.
puts 'Hello' # Return character is LF on other than Windows.

EnforcedStyle: lf

# The `lf` style means that LF (Line Feed) is enforced on
# all platforms.

# bad
puts 'Hello' # Return character is CR+LF on all platfoms.

# good
puts 'Hello' # Return character is LF on all platfoms.

EnforcedStyle: crlf

# The `crlf` style means that CR+LF (Carriage Return + Line Feed) is
# enforced on all platforms.

# bad
puts 'Hello' # Return character is LF on all platfoms.

# good
puts 'Hello' # Return character is CR+LF on all platfoms.

Constant Summary collapse

MSG_DETECTED =
'Carriage return character detected.'
MSG_MISSING =
'Carriage return character missing.'

Constants inherited from Base

Base::RESTRICT_ON_SEND

Constants included from Util

Util::LITERAL_REGEX

Instance Attribute Summary

Attributes inherited from Cop

#offenses

Attributes inherited from Base

#config, #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_configured?, #style_detected, #style_parameter_name, #supported_styles, #unexpected_style_detected

Methods inherited from Cop

#add_offense, all, #corrections, #find_location, #highlights, joining_forces, #messages, #on_investigation_end, #on_new_investigation, #parse, qualified_cop_name, registry, support_autocorrect?, #support_autocorrect?

Methods inherited from Base

#add_global_offense, #add_offense, autocorrect_incompatible_with, badge, #callbacks_needed, callbacks_needed, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, #cop_name, cop_name, department, documentation_url, exclude_from_registry, #excluded_file?, #external_dependency_checksum, inherited, #initialize, joining_forces, lint?, match?, #message, #offenses, #on_investigation_end, #on_new_investigation, #on_other_file, #ready, #relevant_file?, support_autocorrect?, support_multiple_source?, #target_rails_version, #target_ruby_version

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #correctable?, #disable_uncorrectable?, #safe_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

add_parentheses, args_begin, args_end, begins_its_line?, comment_line?, comment_lines?, double_quotes_required?, escape_string, first_part_of_call_chain, indent, interpret_string_escapes, line_range, needs_escaping?, on_node, parentheses?, same_line?, to_string_literal, to_supported_styles, trim_string_interporation_escape_character

Methods included from PathUtil

absolute?, hidden_dir?, hidden_file?, hidden_file_in_not_hidden_dir?, match_path?, maybe_hidden_file?, relative_path, smart_path

Constructor Details

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

Instance Method Details

#investigate(processed_source) ⇒ Object


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# File 'lib/rubocop/cop/layout/end_of_line.rb', line 47

def investigate(processed_source)
  last_line = last_line(processed_source)

  processed_source.raw_source.each_line.with_index do |line, index|
    break if index >= last_line

    msg = offense_message(line)
    next unless msg
    next if unimportant_missing_cr?(index, last_line, line)

    range =
      source_range(processed_source.buffer, index + 1, 0, line.length)
    add_offense(nil, location: range, message: msg)
    # Usually there will be carriage return characters on all or none
    # of the lines in a file, so we report only one offense.
    break
  end
end

#offense_message(line) ⇒ Object


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# File 'lib/rubocop/cop/layout/end_of_line.rb', line 71

def offense_message(line)
  effective_style = if style == :native
                      Platform.windows? ? :crlf : :lf
                    else
                      style
                    end
  case effective_style
  when :lf then MSG_DETECTED if line.end_with?("\r", "\r\n")
  else MSG_MISSING unless line.end_with?("\r\n")
  end
end

#unimportant_missing_cr?(index, last_line, line) ⇒ Boolean

If there is no LF on the last line, we don't care if there's no CR.

Returns:

  • (Boolean)

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# File 'lib/rubocop/cop/layout/end_of_line.rb', line 67

def unimportant_missing_cr?(index, last_line, line)
  style == :crlf && index == last_line - 1 && !/\n$/.match?(line)
end