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Class: RuboCop::Cop::Layout::FirstParameterIndentation

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::MultilineElementIndentation, ::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_parameter_indentation.rb

Overview

Checks the indentation of the first parameter in a method definition. Parameters after the first one are checked by Layout/ParameterAlignment, not by this cop.

For indenting the first argument of method calls, check out Layout/FirstArgumentIndentation, which supports options related to nesting that are irrelevant for method definitions.

Examples:

# bad
def some_method(
first_param,
second_param)
  123
end

EnforcedStyle: consistent (default)

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

# good
def some_method(
  first_param,
second_param)
  123
end

EnforcedStyle: align_parentheses

# The first parameter should always be indented one step more than the
# opening parenthesis.

# good
def some_method(
                 first_param,
second_param)
  123
end

Constant Summary

::RuboCop::Cop::Base - Inherited

EMPTY_OFFENSES, RESTRICT_ON_SEND

::RuboCop::Cop::Alignment - Included

SPACE

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

SYMBOL_TO_STRING_CACHE

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.
.builtin?

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

Cops (other than builtin) are encouraged to implement this.
.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, #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::MultilineElementIndentation - Included

#check_expected_style, #check_first, #detected_styles, #detected_styles_for_column, #each_argument_node, #hash_pair_where_value_beginning_with, #incorrect_style_detected, #indent_base, #key_and_value_begin_on_same_line?, #right_sibling_begins_on_subsequent_line?

::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_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, #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, #max_line_length,
#range_by_lines

Expand the given range to include all of any lines it covers.
#range_of_first_line, #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 Method Details

#autocorrect(corrector, node) (private)

[ GitHub ] 

  


# File 'lib/rubocop/cop/layout/first_parameter_indentation.rb', line 63



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


  








  

    #base_description(_)   (private)
  



  

    


Returns the description of what the correct indentation is based on.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_parameter_indentation.rb', line 83



def base_description(_)
  if style == brace_alignment_style
    'the position of the opening parenthesis'
  else
    'the start of the line where the left parenthesis is'
  end
end


  








  

    #brace_alignment_style   (private)
  

  [ GitHub ]


  

  


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



def brace_alignment_style
  :align_parentheses
end


  








  

    #check(def_node)   (private)
  

  [ GitHub ]


  

  


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



def check(def_node)
  return if ignored_node?(def_node)

  left_parenthesis = def_node.arguments.loc.begin
  first_elem = def_node.first_argument
  return unless first_elem
  return if same_line?(first_elem, left_parenthesis)

  check_first(first_elem, left_parenthesis, nil, 0)
end


  








  

    #message(base_description)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_parameter_indentation.rb', line 91



def message(base_description)
  format(
    MSG,
    configured_indentation_width: configured_indentation_width,
    base_description: base_description
  )
end


  








  

    #on_def(node)  
    Also known as: #on_defs
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_parameter_indentation.rb', line 53



def on_def(node)
  return if node.arguments.empty?
  return if node.arguments.loc.begin.nil?

  check(node)
end


  








  

    #on_defs(node)  
  



  

    


Alias for #on_def.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/first_parameter_indentation.rb', line 59



alias on_defs on_def