My prefer rubocop config

.rubocop.yml

require:
  - rubocop-rspec
#inherit_from: .rubocop_todo.yml

Rails:
  Enabled: true

AllCops:
  TargetRubyVersion: 2.4
  Exclude:
    - 'vendor/**/*'
    - 'node_modules/**/*'
    - 'db/*'
    - 'db/fixtures/**/*'
    - 'tmp/**/*'
    - 'bin/**/*'
    - 'generator_templates/**/*'
    - 'builds/**/*'

#---------------------BUNDLE-------------------------------#

# Gems in consecutive lines should be alphabetically sorted
Bundler/OrderedGems:
  Enabled: true

Bundler/DuplicatedGem:
  Enabled: true

#---------------------METRIC------------------------------#
# A calculated magnitude based on number of assignments,
# branches, and conditions.
Metrics/AbcSize:
  Enabled: true
  Max: 57.08

# This cop checks if the length of a block exceeds some maximum value.
Metrics/BlockLength:
  Enabled: false

# Avoid excessive block nesting.
Metrics/BlockNesting:
  Enabled: true
  Max: 4

# Avoid classes longer than 100 lines of code.
Metrics/ClassLength:
  Enabled: false

# A complexity metric that is strongly correlated to the number
# of test cases needed to validate a method.
Metrics/CyclomaticComplexity:
  Enabled: true
  Max: 16

Metrics/LineLength:
  Max: 120

# Avoid methods longer than 10 lines of code.
Metrics/MethodLength:
  Enabled: true
  Max: 20

# Avoid modules longer than 100 lines of code.
Metrics/ModuleLength:
  Enabled: false

# Avoid parameter lists longer than three or four parameters.
Metrics/ParameterLists:
  Enabled: true
  Max: 6

# A complexity metric geared towards measuring complexity for a human reader.
Metrics/PerceivedComplexity:
  Enabled: true
  Max: 18

#---------------------STYLE-------------------------------#

# Check for non-ascii (non-English) characters in comments.
Style/AsciiComments:
  Enabled: true

# Check the naming of accessor methods for get_/set_.
Style/AccessorMethodName:
  Enabled: false

# Use alias_method instead of alias.
Style/Alias:
  EnforcedStyle: prefer_alias_method
  Enabled: true

# https://github.com/bbatsov/ruby-style-guide#no-and-or-or
Style/AndOr:
  EnforcedStyle: always

Style/ArrayJoin:
  Enabled: true

# https://github.com/bbatsov/ruby-style-guide#no-BEGIN-blocks
Style/BeginBlock:
  Enabled: true

# checks that the last parameter doesn't have braces around it, but requires braces if the second to last parameter is also a hash literal
Style/BracesAroundHashParameters:
  EnforcedStyle: context_dependent

# This cop checks for uses of the case equality operator(===).
Style/CaseEquality:
  Enabled: false

# checks for uses of class variables
Style/ClassVars:
  Enabled: true

Style/Documentation:
  Enabled: false

Style/DocumentationMethod:
  Enabled: false

# https://github.com/bbatsov/ruby-style-guide#no-bang-bang
Style/DoubleNegation:
  Enabled: true

# This cop checks whether the source file has a utf-8 encoding comment or not
Style/Encoding:
  EnforcedStyle: always

# https://github.com/bbatsov/ruby-style-guide#no-END-blocks
Style/EndBlock:
  Enabled: true

Style/FlipFlop:
  Enabled: true

# Checks if there is a magic comment to enforce string literals
Style/FrozenStringLiteralComment:
  Enabled: false

# Do not introduce global variables.
Style/GlobalVars:
  Enabled: true
  Exclude:
    - 'lib/backup/**/*'
    - 'lib/tasks/**/*'

# https://github.com/bbatsov/ruby-style-guide#no-nested-conditionals
Style/GuardClause:
  Enabled: true
  MinBodyLength: 1

Style/HashSyntax:
  Enabled: true
  EnforcedStyle: ruby19

Style/IdenticalConditionalBranches:
  Enabled: true

Style/IfInsideElse:
  Enabled: true

Style/IfUnlessModifierOfIfUnless:
  Enabled: true

Style/IfWithSemicolon:
  Enabled: true

Style/InlineComment:
  Enabled: true

Style/MethodCalledOnDoEndBlock:
  Enabled: true

# This cop checks for the presence of method_missing without also defining respond_to_missing? and falling back on super.
Style/MethodMissing:
  Enabled: true

# Prefer using `module function` than `extend self`
Style/ModuleFunction:
  Enabled: true
  EnforcedStyle: module_function

Style/MultilineBlockChain:
  Enabled: true

Style/MultilineTernaryOperator:
  Enabled: true

Style/MutableConstant:
  Enabled: true

Style/NestedTernaryOperator:
  Enabled: true

Style/OptionHash:
  Enabled: false

Style/StructInheritance:
  Enabled: false

Style/StringLiterals:
  EnforcedStyle: single_quotes

#--------------- LAYOUT ------------------------------------#

# Check indentation of private/protected visibility modifiers.
Layout/AccessModifierIndentation:
  Enabled: true

# Align the elements of an array literal if they span more than one line.
Layout/AlignArray:
  Enabled: true

# Align the elements of a hash literal if they span more than one line.
Layout/AlignHash:
  Enabled: true

# Here we check if the parameters on a multi-line method call or
# definition are aligned.
Layout/AlignParameters:
  Enabled: false

# Indentation of when in a case/when/[else/]end.
Layout/CaseIndentation:
  Enabled: true