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Class: RuboCop::Cop::Layout::FirstArgumentIndentation

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::RuboCop::Cop::AutoCorrector, ::RuboCop::Cop::Base, ::RuboCop::ExcludeLimit, NodePattern::Macros, RuboCop::AST::Sexp
Instance Chain:
self, ::RuboCop::Cop::RangeHelp, ::RuboCop::Cop::ConfigurableEnforcedStyle, ::RuboCop::Cop::Alignment, ::RuboCop::Cop::Base, ::RuboCop::Cop::AutocorrectLogic, ::RuboCop::Cop::IgnoredNode, ::RuboCop::Util, RuboCop::AST::Sexp
Inherits: RuboCop::Cop::Base
Defined in: lib/rubocop/cop/layout/first_argument_indentation.rb

Overview

Checks the indentation of the first argument in a method call. Arguments after the first one are checked by Layout/ArgumentAlignment, not by this cop.

For indenting the first parameter of method definitions, check out Layout/FirstParameterIndentation.

This cop will respect Layout/ArgumentAlignment and will not work when EnforcedStyle: with_fixed_indentation is specified for Layout/ArgumentAlignment.

Examples:

# bad
some_method(
first_param,
second_param)

foo = some_method(
first_param,
second_param)

foo = some_method(nested_call(
nested_first_param),
second_param)

foo = some_method(
nested_call(
nested_first_param),
second_param)

some_method nested_call(
nested_first_param),
second_param

EnforcedStyle: special_for_inner_method_call_in_parentheses (default)

# Same as {special_for_inner_method_call} except that the special rule
# only applies if the outer method call encloses its arguments in
# parentheses.

# good
some_method(
  first_param,
second_param)

foo = some_method(
  first_param,
second_param)

foo = some_method(nested_call(
                    nested_first_param),
second_param)

foo = some_method(
  nested_call(
    nested_first_param),
second_param)

some_method nested_call(
  nested_first_param),
second_param

EnforcedStyle: consistent

# The first argument should always be indented one step more than the
# preceding line.

# good
some_method(
  first_param,
second_param)

foo = some_method(
  first_param,
second_param)

foo = some_method(nested_call(
  nested_first_param),
second_param)

foo = some_method(
  nested_call(
    nested_first_param),
second_param)

some_method nested_call(
  nested_first_param),
second_param

EnforcedStyle: consistent_relative_to_receiver

# The first argument should always be indented one level relative to
# the parent that is receiving the argument

# good
some_method(
  first_param,
second_param)

foo = some_method(
        first_param,
second_param)

foo = some_method(nested_call(
                    nested_first_param),
second_param)

foo = some_method(
        nested_call(
          nested_first_param),
second_param)

some_method nested_call(
              nested_first_param),
second_params

EnforcedStyle: special_for_inner_method_call

# The first argument should normally be indented one step more than
# the preceding line, but if it's an argument for a method call that
# is itself an argument in a method call, then the inner argument
# should be indented relative to the inner method.

# good
some_method(
  first_param,
second_param)

foo = some_method(
  first_param,
second_param)

foo = some_method(nested_call(
                    nested_first_param),
second_param)

foo = some_method(
  nested_call(
    nested_first_param),
second_param)

some_method nested_call(
              nested_first_param),
second_param

Constant Summary

::RuboCop::Cop::Base - Inherited

EMPTY_OFFENSES, RESTRICT_ON_SEND

::RuboCop::Cop::Alignment - Included

SPACE

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

SYMBOL_TO_STRING_CACHE

::RuboCop::Cop::RangeHelp - Included

BYTE_ORDER_MARK, NOT_GIVEN

Class Attribute Summary

::RuboCop::Cop::AutoCorrector - Extended

support_autocorrect?

::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 a 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

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

#detected_style, #detected_style=, #no_acceptable_style?, #style_configured?

::RuboCop::Cop::Alignment - Included

#column_delta

::RuboCop::Cop::Base - Inherited

#active_support_extensions_enabled?, #always_autocorrect?, #config, #config_to_allow_offenses, #config_to_allow_offenses=, #contextual_autocorrect?, #processed_source, #string_literals_frozen_by_default?, #target_satisfies_all_gem_version_requirements?

::RuboCop::Cop::AutocorrectLogic - Included

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

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

#alternative_style, #alternative_styles, #ambiguous_style_detected,
#conflicting_styles_detected

Alias for ConfigurableEnforcedStyle#no_acceptable_style!.
#correct_style_detected, #no_acceptable_style!, #opposite_style_detected, #style, #style_detected, #style_parameter_name, #supported_styles, #unexpected_style_detected,
#unrecognized_style_detected

Alias for ConfigurableEnforcedStyle#no_acceptable_style!.

::RuboCop::Cop::Alignment - Included

#check_alignment, #configured_indentation_width, #display_column, #each_bad_alignment, #end_of_line_comment, #indentation, #offset, #register_offense, #within?

::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_gem_version

Returns a gems locked versions (i.e.
#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

#disable_offense, #disable_offense_at_end_of_line, #disable_offense_before_and_after, #disable_offense_with_eol_or_surround_comment, #heredoc_range, #max_line_length, #multiline_ranges, #multiline_string?,
#range_by_lines

Expand the given range to include all of any lines it covers.
#range_of_first_line, #range_overlaps_offense?, #string_continuation?, #surrounding_heredoc?, #surrounding_percent_array?

::RuboCop::Cop::IgnoredNode - Included

#ignore_node, #ignored_node?, #part_of_ignored_node?, #ignored_nodes

Constructor Details

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

Instance Attribute Details

#enable_layout_first_method_argument_line_break? ⇒ Boolean (readonly, private)

[ GitHub ] 

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 276



def enable_layout_first_method_argument_line_break?
  config.cop_enabled?('Layout/FirstMethodArgumentLineBreak')
end


  








  

    #enforce_first_argument_with_fixed_indentation?  ⇒ Boolean  (readonly, private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 271



def enforce_first_argument_with_fixed_indentation?
  argument_alignment_config = config.for_enabled_cop('Layout/ArgumentAlignment')
  argument_alignment_config['EnforcedStyle'] == 'with_fixed_indentation'
end


  







Instance Method Details



  

    #autocorrect(corrector, node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 174



def autocorrect(corrector, node)
  AlignmentCorrector.correct(corrector, processed_source, node, column_delta)
end


  








  

    #bare_operator?(node)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 178



def bare_operator?(node)
  node.operator_method? && !node.dot?
end


  








  

    #base_indentation(node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 198



def base_indentation(node)
  if special_inner_call_indentation?(node)
    column_of(base_range(node, node.first_argument))
  else
    previous_code_line(node.first_argument.first_line) =~ /\S/
  end
end


  








  

    #base_range(send_node, arg_node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 226



def base_range(send_node, arg_node)
  parent = send_node.parent
  start_node = if parent && (parent.splat_type? || parent.kwsplat_type?)
                 send_node.parent
               else
                 send_node
               end
  range_between(start_node.source_range.begin_pos, arg_node.source_range.begin_pos)
end


  








  

    #column_of(range)   (private)
  



  

    


Returns the column of the given range. For single line ranges, this
is simple. For ranges with line breaks, we look a the last code line.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 238



def column_of(range)
  source = range.source.strip
  if source.include?("\n")
    previous_code_line(range.line + source.count("\n") + 1) =~ /\S/
  else
    display_column(range)
  end
end


  








  

    #comment_lines   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 259



def comment_lines
  @comment_lines ||=
    processed_source
    .comments
    .select { |c| begins_its_line?(c.source_range) }
    .map { |c| c.loc.line }
end


  








  

    #eligible_method_call?(node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 222



def_node_matcher :eligible_method_call?, <<~PATTERN
  (send _ !:[]= ...)
PATTERN


  








  

    #message(arg_node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 182



def message(arg_node)
  return 'Bad indentation of the first argument.' unless arg_node

  send_node = arg_node.parent
  text = base_range(send_node, arg_node).source.strip
  base = if !text.include?("\n") && special_inner_call_indentation?(send_node)
           "`#{text}`"
         elsif comment_line?(text.lines.reverse_each.first)
           'the start of the previous line (not counting the comment)'
         else
           'the start of the previous line'
         end

  format(MSG, base: base)
end


  








  

    #on_csend(node)  
  



  

    


Alias for #on_send.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 165



alias on_csend on_send


  








  

    #on_new_investigation   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 267



def on_new_investigation
  @comment_lines = nil
end


  








  

    #on_send(node)  
    Also known as: #on_csend, #on_super
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 155



def on_send(node)
  return unless should_check?(node)
  return if same_line?(node, node.first_argument)
  return if style != :consistent && enforce_first_argument_with_fixed_indentation? &&
            !enable_layout_first_method_argument_line_break?

  indent = base_indentation(node) + configured_indentation_width

  check_alignment([node.first_argument], indent)
end


  








  

    #on_super(node)  
  



  

    


Alias for #on_send.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 166



alias on_super on_send


  








  

    #previous_code_line(line_number)   (private)
  



  

    


Takes the line number of a given code line and returns a string
containing the previous line that’s not a comment line or a blank
line.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 250



def previous_code_line(line_number)
  line = ''
  while line.blank? || comment_lines.include?(line_number)
    line_number -= 1
    line = processed_source.lines[line_number - 1]
  end
  line
end


  








  

    #should_check?(node)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 170



def should_check?(node)
  node.arguments? && !bare_operator?(node) && !node.setter_method?
end


  








  

    #special_inner_call_indentation?(node)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_argument_indentation.rb', line 206



def special_inner_call_indentation?(node)
  return false if style == :consistent
  return true  if style == :consistent_relative_to_receiver

  parent = node.parent

  return false unless eligible_method_call?(parent)
  return false if !parent.parenthesized? &&
                  style == :special_for_inner_method_call_in_parentheses

  # The node must begin inside the parent, otherwise node is the first
  # part of a chained method call.
  node.source_range.begin_pos > parent.source_range.begin_pos
end