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

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::RuboCop::Cop::Base, ::RuboCop::ExcludeLimit, NodePattern::Macros, RuboCop::AST::Sexp
Instance Chain:
Inherits: RuboCop::Cop::Base
Defined in: lib/rubocop/cop/layout/end_of_line.rb

Overview

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 platforms.

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

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 platforms.

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

Constant Summary

::RuboCop::Cop::Base - Inherited

EMPTY_OFFENSES, RESTRICT_ON_SEND

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

SYMBOL_TO_STRING_CACHE

::RuboCop::Cop::RangeHelp - Included

BYTE_ORDER_MARK, NOT_GIVEN

Class Attribute Summary

::RuboCop::Cop::Base - Inherited

.gem_requirements, .lint?,
.support_autocorrect?

Returns if class supports autocorrect.

.support_multiple_source?

Override if your cop should be called repeatedly for multiple investigations Between calls to on_new_investigation and on_investigation_end, the result of processed_source will remain constant.

Class Method Summary

::RuboCop::Cop::Base - Inherited

.autocorrect_incompatible_with

List of cops that should not try to autocorrect at the same time as this cop.

.badge

Naming.

.callbacks_needed, .cop_name, .department,
.documentation_url

Returns an url to view this cops documentation online.

.exclude_from_registry

Call for abstract Cop classes.

.inherited,
.joining_forces

Override and return the Force class(es) you need to join.

.match?

Returns true if the cop name or the cop namespace matches any of the given names.

.new,
.requires_gem

Register a version requirement for the given gem name.

.restrict_on_send

::RuboCop::ExcludeLimit - Extended

exclude_limit

Sets up a configuration option to have an exclude limit tracked.

transform

Instance Attribute Summary

Instance Method Summary

::RuboCop::Cop::RangeHelp - Included

#add_range, #column_offset_between,
#contents_range

A range containing only the contents of a literal with delimiters (e.g.

#directions,
#effective_column

Returns the column attribute of the range, except if the range is on the first line and there’s a byte order mark at the beginning of that line, in which case 1 is subtracted from the column value.

#final_pos, #move_pos, #move_pos_str, #range_between, #range_by_whole_lines, #range_with_comments, #range_with_comments_and_lines, #range_with_surrounding_comma, #range_with_surrounding_space, #source_range

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

::RuboCop::Cop::Base - Inherited

#add_global_offense

Adds an offense that has no particular location.

#add_offense

Adds an offense on the specified range (or node with an expression) Unless that offense is disabled for this range, a corrector will be yielded to provide the cop the opportunity to autocorrect the offense.

#begin_investigation

Called before any investigation.

#callbacks_needed,
#cop_config

Configuration Helpers.

#cop_name, #excluded_file?,
#external_dependency_checksum

This method should be overridden when a cop’s behavior depends on state that lives outside of these locations:

#inspect,
#message

Gets called if no message is specified when calling add_offense or add_global_offense Cops are discouraged to override this; instead pass your message directly.

#name

Alias for Base#cop_name.

#offenses,
#on_investigation_end

Called after all on_…​

#on_new_investigation

Called before all on_…​

#on_other_file

Called instead of all on_…​

#parse

There should be very limited reasons for a Cop to do it’s own parsing.

#parser_engine,
#ready

Called between investigations.

#relevant_file?, #target_rails_version, #target_ruby_version, #annotate, #apply_correction, #attempt_correction,
#callback_argument

Reserved for Cop::Cop.

#complete_investigation

Called to complete an investigation.

#correct, #current_corrector,
#current_offense_locations

Reserved for Commissioner:

#current_offenses, #currently_disabled_lines, #custom_severity, #default_severity, #disable_uncorrectable, #enabled_line?, #file_name_matches_any?, #find_message, #find_severity, #range_for_original, #range_from_node_or_range,
#reset_investigation

Actually private methods.

#use_corrector

::RuboCop::Cop::AutocorrectLogic - Included

::RuboCop::Cop::IgnoredNode - Included

Constructor Details

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

Instance Method Details

#last_line(processed_source) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/end_of_line.rb', line 85

def last_line(processed_source)
  last_token = processed_source.tokens.last
  last_token ? last_token.line : processed_source.lines.length
end

#offense_message(line)

[ GitHub ]

  
# 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

#on_new_investigation

[ GitHub ]

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

def on_new_investigation
  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(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

#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.

[ GitHub ]

  
# 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 && !line.end_with?("\n")
end