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Class: RuboCop::Cop::Layout::FirstHashElementIndentation

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:
Inherits: RuboCop::Cop::Base
Defined in: lib/rubocop/cop/layout/first_hash_element_indentation.rb

Overview

Checks the indentation of the first key in a hash literal where the opening brace and the first key are on separate lines. The other keys' indentations are handled by the HashAlignment cop.

By default, Hash literals that are arguments in a method call with parentheses, and where the opening curly brace of the hash is on the same line as the opening parenthesis of the method call, shall have their first key indented one step (two spaces) more than the position inside the opening parenthesis.

Other hash literals shall have their first key indented one step more than the start of the line where the opening curly brace is.

This default style is called 'special_inside_parentheses'. Alternative styles are 'consistent' and 'align_braces'. Here are examples:

Examples:

EnforcedStyle: special_inside_parentheses (default)

# The `special_inside_parentheses` style enforces that the first key
# in a hash literal where the opening brace and the first key are on
# separate lines is indented one step (two spaces) more than the
# position inside the opening parentheses.

# bad
hash = {
  key: :value
}
and_in_a_method_call({
  no: :difference
                     })
takes_multi_pairs_hash(x: {
  a: 1,
  b: 2
},
                       y: {
                         c: 1,
                         d: 2
                       })

# good
special_inside_parentheses
hash = {
  key: :value
}
but_in_a_method_call({
                       its_like: :this
                     })
takes_multi_pairs_hash(x: {
                         a: 1,
                         b: 2
                       },
                       y: {
                         c: 1,
                         d: 2
                       })

EnforcedStyle: consistent

# The `consistent` style enforces that the first key in a hash
# literal where the opening brace and the first key are on
# separate lines is indented the same as a hash literal which is not
# defined inside a method call.

# bad
hash = {
  key: :value
}
but_in_a_method_call({
                       its_like: :this
                      })

# good
hash = {
  key: :value
}
and_in_a_method_call({
  no: :difference
})

EnforcedStyle: align_braces

# The `align_brackets` style enforces that the opening and closing
# braces are indented to the same position.

# bad
and_now_for_something = {
                          completely: :different
}
takes_multi_pairs_hash(x: {
  a: 1,
  b: 2
},
                        y: {
                             c: 1,
                             d: 2
                           })

# good
and_now_for_something = {
                          completely: :different
                        }
takes_multi_pairs_hash(x: {
                            a: 1,
                            b: 2
                          },
                       y: {
                            c: 1,
                            d: 2
                          })

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

::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::MultilineElementIndentation - Included

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

::RuboCop::Cop::Alignment - 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 Attribute Details

#enforce_first_argument_with_fixed_indentation?Boolean (readonly, private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 227

def enforce_first_argument_with_fixed_indentation?
  return false unless argument_alignment_config['Enabled']

  argument_alignment_config['EnforcedStyle'] == 'with_fixed_indentation'
end

Instance Method Details

#argument_alignment_config (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 233

def argument_alignment_config
  config.for_cop('Layout/ArgumentAlignment')
end

#autocorrect(corrector, node) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 137

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

#base_description(indent_base_type) (private)

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

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 191

def base_description(indent_base_type)
  case indent_base_type
  when :left_brace_or_bracket
    'the position of the opening brace'
  when :first_column_after_left_parenthesis
    'the first position after the preceding left parenthesis'
  when :parent_hash_key
    'the parent hash key'
  else
    'the start of the line where the left curly brace is'
  end
end

#brace_alignment_style (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 141

def brace_alignment_style
  :align_braces
end

#check(hash_node, left_parenthesis) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 145

def check(hash_node, left_parenthesis)
  return if ignored_node?(hash_node)

  left_brace = hash_node.loc.begin
  first_pair = hash_node.pairs.first

  if first_pair
    return if same_line?(first_pair, left_brace)

    if separator_style?(first_pair)
      check_based_on_longest_key(hash_node, left_brace, left_parenthesis)
    else
      check_first(first_pair, left_brace, left_parenthesis, 0)
    end
  end

  check_right_brace(hash_node.loc.end, first_pair, left_brace, left_parenthesis)
end

#check_based_on_longest_key(hash_node, left_brace, left_parenthesis) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 184

def check_based_on_longest_key(hash_node, left_brace, left_parenthesis)
  key_lengths = hash_node.keys.map { |key| key.source_range.length }
  check_first(hash_node.pairs.first, left_brace, left_parenthesis,
              key_lengths.max - key_lengths.first)
end

#check_right_brace(right_brace, first_pair, left_brace, left_parenthesis) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 164

def check_right_brace(right_brace, first_pair, left_brace, left_parenthesis)
  # if the right brace is on the same line as the last value, accept
  return if /\S/.match?(right_brace.source_line[0...right_brace.column])

  expected_column, indent_base_type = indent_base(left_brace, first_pair, left_parenthesis)
  @column_delta = expected_column - right_brace.column
  return if @column_delta.zero?

  message = message_for_right_brace(indent_base_type)
  add_offense(right_brace, message: message) do |corrector|
    autocorrect(corrector, right_brace)
  end
end

#message(base_description) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 204

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

#message_for_right_brace(indent_base_type) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 212

def message_for_right_brace(indent_base_type)
  case indent_base_type
  when :left_brace_or_bracket
    'Indent the right brace the same as the left brace.'
  when :first_column_after_left_parenthesis
    'Indent the right brace the same as the first position ' \
    'after the preceding left parenthesis.'
  when :parent_hash_key
    'Indent the right brace the same as the parent hash key.'
  else
    'Indent the right brace the same as the start of the line ' \
    'where the left brace is.'
  end
end

#on_csend(node)

Alias for #on_send.

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 133

alias on_csend on_send

#on_hash(node)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 122

def on_hash(node)
  check(node, nil) if node.loc.begin
end

#on_send(node) Also known as: #on_csend

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/first_hash_element_indentation.rb', line 126

def on_send(node)
  return if enforce_first_argument_with_fixed_indentation?

  each_argument_node(node, :hash) do |hash_node, left_parenthesis|
    check(hash_node, left_parenthesis)
  end
end

#separator_style?(first_pair) ⇒ Boolean (private)

[ GitHub ]

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

def separator_style?(first_pair)
  separator = first_pair.loc.operator
  key = "Enforced#{separator.is?(':') ? 'Colon' : 'HashRocket'}Style"
  config.for_cop('Layout/HashAlignment')[key] == 'separator'
end