Rubocop config

.rubocop.yml

# inherit_from: .rubocop_todo.yml

AllCops:
  # Default formatter will be used if no `-f/--format` option is given.
  DefaultFormatter: fuubar
  # Cop names are displayed in offense messages by default. Change behavior
  # by overriding DisplayCopNames, or by giving the `--no-display-cop-names`
  # option.
  DisplayCopNames: true
  # Style guide URLs are not displayed in offense messages by default. Change
  # behavior by overriding `DisplayStyleGuide`, or by giving the
  # `-S/--display-style-guide` option.
  DisplayStyleGuide: true
  # When specifying style guide URLs, any paths and/or fragments will be
  # evaluated relative to the base URL.
  StyleGuideBaseURL: https://github.com/rubocop-hq/ruby-style-guide
  # Extra details are not displayed in offense messages by default. Change
  # behavior by overriding ExtraDetails, or by giving the
  # `-E/--extra-details` option.
  ExtraDetails: false
  # Additional cops that do not reference a style guide rule may be enabled by
  # default. Change behavior by overriding `StyleGuideCopsOnly`, or by giving
  # the `--only-guide-cops` option.
  StyleGuideCopsOnly: false
  # All cops except the ones configured `Enabled: false` in this file are enabled by default.
  # Change this behavior by overriding either `DisabledByDefault` or `EnabledByDefault`.
  # When `DisabledByDefault` is `true`, all cops in the default configuration
  # are disabled, and only cops in user configuration are enabled. This makes
  # cops opt-in instead of opt-out. Note that when `DisabledByDefault` is `true`,
  # cops in user configuration will be enabled even if they don't set the
  # Enabled parameter.
  # When `EnabledByDefault` is `true`, all cops, even those configured `Enabled: false`
  # in this file are enabled by default. Cops can still be disabled in user configuration.
  # Note that it is invalid to set both EnabledByDefault and DisabledByDefault
  # to true in the same configuration.
  EnabledByDefault: false
  DisabledByDefault: false
  # Enables the result cache if `true`. Can be overridden by the `--cache` command
  # line option.
  UseCache: true
  # Threshold for how many files can be stored in the result cache before some
  # of the files are automatically removed.
  MaxFilesInCache: 20000
  # The cache will be stored in "rubocop_cache" under this directory. If
  # CacheRootDirectory is ~ (nil), which it is by default, the root will be
  # taken from the environment variable `$XDG_CACHE_HOME` if it is set, or if
  # `$XDG_CACHE_HOME` is not set, it will be `$HOME/.cache/`.
  CacheRootDirectory: ~
  # It is possible for a malicious user to know the location of RuboCop's cache
  # directory by looking at CacheRootDirectory, and create a symlink in its
  # place that could cause RuboCop to overwrite unintended files, or read
  # malicious input. If you are certain that your cache location is secure from
  # this kind of attack, and wish to use a symlinked cache location, set this
  # value to "true".
  AllowSymlinksInCacheRootDirectory: false
  # What MRI version of the Ruby interpreter is the inspected code intended to
  # run on? (If there is more than one, set this to the lowest version.)
  # If a value is specified for TargetRubyVersion then it is used. Acceptable
  # values are specificed as a float (i.e. 2.5); the teeny version of Ruby
  # should not be included. If the project specifies a Ruby version in the
  # .ruby-version file, Gemfile or gems.rb file, RuboCop will try to determine
  # the desired version of Ruby by inspecting the .ruby-version file first,
  # followed by the Gemfile.lock or gems.locked file. (Although the Ruby version
  # is specified in the Gemfile or gems.rb file, RuboCop reads the final value
  # from the lock file.) If the Ruby version is still unresolved, RuboCop will
  # use the oldest officially supported Ruby version (currently Ruby 2.2).
  TargetRubyVersion: ~
  # What version of Rails is the inspected code using?  If a value is specified
  # for TargetRailsVersion then it is used. Acceptable values are specificed
  # as a float (i.e. 5.1); the patch version of Rails should not be included.
  # If TargetRailsVersion is not set, RuboCop will parse the Gemfile.lock or
  # gems.locked file to find the version of Rails that has been bound to the
  # application. If neither of those files exist, RuboCop will use Rails 5.0
  # as the default.
  TargetRailsVersion: ~

#################### Layout ###########################

Layout/AlignArray:
  Description: >-
                 Align the elements of an array literal if they span more than
                 one line.
  StyleGuide: '#align-multiline-arrays'
  Enabled: false
  VersionAdded: '0.49'

Layout/AlignHash:
  Description: >-
                 Align the elements of a hash literal if they span more than
                 one line.
  Enabled: true
  VersionAdded: '0.49'
  # Alignment of entries using hash rocket as separator. Valid values are:
  #
  # key - left alignment of keys
  #   'a' => 2
  #   'bb' => 3
  # separator - alignment of hash rockets, keys are right aligned
  #    'a' => 2
  #   'bb' => 3
  # table - left alignment of keys, hash rockets, and values
  #   'a'  => 2
  #   'bb' => 3
  EnforcedHashRocketStyle: table
  SupportedHashRocketStyles:
    - key
    - separator
    - table
  # Alignment of entries using colon as separator. Valid values are:
  #
  # key - left alignment of keys
  #   a: 0
  #   bb: 1
  # separator - alignment of colons, keys are right aligned
  #    a: 0
  #   bb: 1
  # table - left alignment of keys and values
  #   a:  0
  #   bb: 1
  EnforcedColonStyle: table
  SupportedColonStyles:
    - key
    - separator
    - table
  # Select whether hashes that are the last argument in a method call should be
  # inspected? Valid values are:
  #
  # always_inspect - Inspect both implicit and explicit hashes.
  #   Registers an offense for:
  #     function(a: 1,
  #       b: 2)
  #   Registers an offense for:
  #     function({a: 1,
  #       b: 2})
  # always_ignore - Ignore both implicit and explicit hashes.
  #   Accepts:
  #     function(a: 1,
  #       b: 2)
  #   Accepts:
  #     function({a: 1,
  #       b: 2})
  # ignore_implicit - Ignore only implicit hashes.
  #   Accepts:
  #     function(a: 1,
  #       b: 2)
  #   Registers an offense for:
  #     function({a: 1,
  #       b: 2})
  # ignore_explicit - Ignore only explicit hashes.
  #   Accepts:
  #     function({a: 1,
  #       b: 2})
  #   Registers an offense for:
  #     function(a: 1,
  #       b: 2)
  EnforcedLastArgumentHashStyle: ignore_implicit
  SupportedLastArgumentHashStyles:
    - always_inspect
    - always_ignore
    - ignore_implicit
    - ignore_explicit

Layout/AlignParameters:
  Description: >-
                 Align the parameters of a method call if they span more
                 than one line.
  StyleGuide: '#no-double-indent'
  Enabled: true
  VersionAdded: '0.49'
  # Alignment of parameters in multi-line method calls.
  #
  # The `with_first_parameter` style aligns the following lines along the same
  # column as the first parameter.
  #
  #     method_call(a,
  #                 b)
  #
  # The `with_fixed_indentation` style aligns the following lines with one
  # level of indentation relative to the start of the line with the method call.
  #
  #     method_call(a,
  #       b)
  EnforcedStyle: with_fixed_indentation
  SupportedStyles:
    - with_first_parameter
    - with_fixed_indentation
  # By default, the indentation width from Layout/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Layout/BlockAlignment:
  Description: 'Align block ends correctly.'
  Enabled: true
  VersionAdded: '0.53'
  # The value `start_of_block` means that the `end` should be aligned with line
  # where the `do` keyword appears.
  # The value `start_of_line` means it should be aligned with the whole
  # expression's starting line.
  # The value `either` means both are allowed.
  EnforcedStyleAlignWith: start_of_line
  SupportedStylesAlignWith:
    - either
    - start_of_block
    - start_of_line

Layout/CaseIndentation:
  Description: 'Indentation of when in a case/when/[else/]end.'
  StyleGuide: '#indent-when-to-case'
  Enabled: true
  VersionAdded: '0.49'
  EnforcedStyle: end
  SupportedStyles:
    - case
    - end
  IndentOneStep: false
  # By default, the indentation width from `Layout/IndentationWidth` is used.
  # But it can be overridden by setting this parameter.
  # This only matters if `IndentOneStep` is `true`
  IndentationWidth: ~

Layout/ClassStructure:
  Description: 'Enforces a configured order of definitions within a class body.'
  StyleGuide: 'https://github.com/rubocop-hq/ruby-style-guide#consistent-classes'
  Enabled: true
  VersionAdded: '0.52'
  Categories:
    module_inclusion:
      - include
      - prepend
      - extend
    attribute:
      - attr_accessor
      - attr_reader
      - attr_writer
    association:
      - belongs_to
      - has_many
      - has_one
  ExpectedOrder:
      - module_inclusion
      - constants
      - public_class_methods
      - initializer
      - public_methods
      - protected_methods
      - private_methods

Layout/EndAlignment:
  Description: 'Align ends correctly.'
  Enabled: true
  VersionAdded: '0.53'
  # The value `keyword` means that `end` should be aligned with the matching
  # keyword (`if`, `while`, etc.).
  # The value `variable` means that in assignments, `end` should be aligned
  # with the start of the variable on the left hand side of `=`. In all other
  # situations, `end` should still be aligned with the keyword.
  # The value `start_of_line` means that `end` should be aligned with the start
  # of the line which the matching keyword appears on.
  EnforcedStyleAlignWith: start_of_line
  SupportedStylesAlignWith:
    - keyword
    - variable
    - start_of_line
  AutoCorrect: false
  Severity: warning

Layout/EndOfLine:
  Description: 'Use Unix-style line endings.'
  StyleGuide: '#crlf'
  Enabled: true
  VersionAdded: '0.49'
  # The `native` style means that CR+LF (Carriage Return + Line Feed) is
  # enforced on Windows, and LF is enforced on other platforms. The other styles
  # mean LF and CR+LF, respectively.
  EnforcedStyle: lf
  SupportedStyles:
    - native
    - lf
    - crlf

Layout/FirstMethodArgumentLineBreak:
  Description: >-
                 Checks for a line break before the first argument in a
                 multi-line method call.
  Enabled: true
  VersionAdded: '0.49'

Layout/FirstMethodParameterLineBreak:
  Description: >-
                 Checks for a line break before the first parameter in a
                 multi-line method parameter definition.
  Enabled: true
  VersionAdded: '0.49'

Layout/FirstParameterIndentation:
  Description: 'Checks the indentation of the first parameter in a method call.'
  Enabled: true
  VersionAdded: '0.49'
  VersionChanged: '0.56'
  EnforcedStyle: consistent
  SupportedStyles:
    # The first parameter should always be indented one step more than the
    # preceding line.
    - consistent
    # The first parameter should always be indented one level relative to the
    # parent that is receiving the parameter
    - consistent_relative_to_receiver
    # The first parameter should normally be indented one step more than the
    # preceding line, but if it's a parameter for a method call that is itself
    # a parameter in a method call, then the inner parameter should be indented
    # relative to the inner method.
    - special_for_inner_method_call
    # Same as `special_for_inner_method_call` except that the special rule only
    # applies if the outer method call encloses its arguments in parentheses.
    - special_for_inner_method_call_in_parentheses
  # By default, the indentation width from `Layout/IndentationWidth` is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Layout/IndentArray:
  Description: >-
                 Checks the indentation of the first element in an array
                 literal.
  Enabled: true
  VersionAdded: '0.49'
  # The value `special_inside_parentheses` means that array literals with
  # brackets that have their opening bracket on the same line as a surrounding
  # opening round parenthesis, shall have their first element indented relative
  # to the first position inside the parenthesis.
  #
  # The value `consistent` means that the indentation of the first element shall
  # always be relative to the first position of the line where the opening
  # bracket is.
  #
  # The value `align_brackets` means that the indentation of the first element
  # shall always be relative to the position of the opening bracket.
  EnforcedStyle: consistent
  SupportedStyles:
    - special_inside_parentheses
    - consistent
    - align_brackets
  # By default, the indentation width from `Layout/IndentationWidth` is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Layout/IndentAssignment:
  Description: >-
                 Checks the indentation of the first line of the
                 right-hand-side of a multi-line assignment.
  Enabled: false
  VersionAdded: '0.49'
  # By default, the indentation width from `Layout/IndentationWidth` is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Layout/IndentHash:
  Description: 'Checks the indentation of the first key in a hash literal.'
  Enabled: true
  VersionAdded: '0.49'
  # The value `special_inside_parentheses` means that hash literals with braces
  # that have their opening brace on the same line as a surrounding opening
  # round parenthesis, shall have their first key indented relative to the
  # first position inside the parenthesis.
  #
  # The value `consistent` means that the indentation of the first key shall
  # always be relative to the first position of the line where the opening
  # brace is.
  #
  # The value `align_braces` means that the indentation of the first key shall
  # always be relative to the position of the opening brace.
  EnforcedStyle: consistent
  SupportedStyles:
    - special_inside_parentheses
    - consistent
    - align_braces
  # By default, the indentation width from `Layout/IndentationWidth` is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Layout/IndentHeredoc:
  Description: 'This cop checks the indentation of the here document bodies.'
  StyleGuide: '#squiggly-heredocs'
  Enabled: true
  VersionAdded: '0.49'
  EnforcedStyle: squiggly
  SupportedStyles:
    - auto_detection
    - squiggly
    - active_support
    - powerpack
    - unindent

Layout/IndentationConsistency:
  Description: 'Keep indentation straight.'
  StyleGuide: '#spaces-indentation'
  Enabled: true
  VersionAdded: '0.49'
  # The difference between `rails` and `normal` is that the `rails` style
  # prescribes that in classes and modules the `protected` and `private`
  # modifier keywords shall be indented the same as public methods and that
  # protected and private members shall be indented one step more than the
  # modifiers. Other than that, both styles mean that entities on the same
  # logical depth shall have the same indentation.
  EnforcedStyle: normal
  SupportedStyles:
    - normal
    - rails

Layout/MultilineAssignmentLayout:
  Description: 'Check for a newline after the assignment operator in multi-line assignments.'
  StyleGuide: '#indent-conditional-assignment'
  Enabled: false
  VersionAdded: '0.49'
  # The types of assignments which are subject to this rule.
  SupportedTypes:
    - block
    - case
    - class
    - if
    - kwbegin
    - module
  EnforcedStyle: same_line
  SupportedStyles:
    # Ensures that the assignment operator and the rhs are on the same line for
    # the set of supported types.
    - same_line
    # Ensures that the assignment operator and the rhs are on separate lines
    # for the set of supported types.
    - new_line

Layout/MultilineMethodCallIndentation:
  Description: >-
                 Checks indentation of method calls with the dot operator
                 that span more than one line.
  Enabled: true
  VersionAdded: '0.49'
  EnforcedStyle: indented
  SupportedStyles:
    - aligned
    - indented
    - indented_relative_to_receiver
  # By default, the indentation width from Layout/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Layout/MultilineMethodDefinitionBraceLayout:
  Description: >-
                 Checks that the closing brace in a method definition is
                 either on the same line as the last method parameter, or
                 a new line.
  Enabled: true
  VersionAdded: '0.49'
  EnforcedStyle: new_line
  SupportedStyles:
    # symmetrical: closing brace is positioned in same way as opening brace
    # new_line: closing brace is always on a new line
    # same_line: closing brace is always on the same line as last parameter
    - symmetrical
    - new_line
    - same_line

Layout/SpaceInsideHashLiteralBraces:
  Description: "Use spaces inside hash literal braces - or don't."
  StyleGuide: '#spaces-operators'
  Enabled: true
  VersionAdded: '0.49'
  EnforcedStyle: no_space
  SupportedStyles:
    - space
    - no_space
    # 'compact' normally requires a space inside hash braces, with the exception
    # that successive left braces or right braces are collapsed together
    - compact
  EnforcedStyleForEmptyBraces: no_space
  SupportedStylesForEmptyBraces:
    - space
    - no_space

#################### Metrics ###############################

Metrics/AbcSize:
  Description: >-
                 A calculated magnitude based on number of assignments,
                 branches, and conditions.
  Reference: 'http://c2.com/cgi/wiki?AbcMetric'
  Enabled: true
  VersionAdded: '0.27'
  # The ABC size is a calculated magnitude, so this number can be an Integer or
  # a Float.
  Max: 15

Metrics/BlockLength:
  Description: 'Avoid long blocks with many lines.'
  Enabled: true
  VersionAdded: '0.44'
  VersionChanged: '0.58'
  CountComments: false  # count full line comments?
  Max: 25
  ExcludedMethods:
    # By default, exclude the `#refine` method, as it tends to have larger
    # associated blocks.
    - refine

Metrics/BlockNesting:
  Description: 'Avoid excessive block nesting'
  StyleGuide: '#three-is-the-number-thou-shalt-count'
  Enabled: true
  VersionAdded: '0.25'
  VersionChanged: '0.47'
  CountBlocks: false
  Max: 3

Metrics/ClassLength:
  Description: 'Avoid classes longer than 100 lines of code.'
  Enabled: true
  VersionAdded: '0.25'
  CountComments: false  # count full line comments?
  Max: 100

# Avoid complex methods.
Metrics/CyclomaticComplexity:
  Description: >-
                 A complexity metric that is strongly correlated to the number
                 of test cases needed to validate a method.
  Enabled: true
  VersionAdded: '0.25'
  Max: 6

Metrics/LineLength:
  Description: 'Limit lines to 80 characters.'
  StyleGuide: '#80-character-limits'
  Enabled: true
  VersionAdded: '0.25'
  VersionChanged: '0.46'
  Max: 80
  # To make it possible to copy or click on URIs in the code, we allow lines
  # containing a URI to be longer than Max.
  AllowHeredoc: true
  AllowURI: true
  URISchemes:
    - http
    - https
  # The IgnoreCopDirectives option causes the LineLength rule to ignore cop
  # directives like '# rubocop: enable ...' when calculating a line's length.
  IgnoreCopDirectives: false
  # The IgnoredPatterns option is a list of !ruby/regexp and/or string
  # elements. Strings will be converted to Regexp objects. A line that matches
  # any regular expression listed in this option will be ignored by LineLength.
  IgnoredPatterns: []

Metrics/MethodLength:
  Description: 'Avoid methods longer than 10 lines of code.'
  StyleGuide: '#short-methods'
  Enabled: true
  VersionAdded: '0.25'
  VersionChanged: '0.59.2'
  CountComments: false  # count full line comments?
  Max: 20
  ExcludedMethods: []

Metrics/ModuleLength:
  Description: 'Avoid modules longer than 100 lines of code.'
  Enabled: true
  VersionAdded: '0.31'
  CountComments: false  # count full line comments?
  Max: 120

Metrics/ParameterLists:
  Description: 'Avoid parameter lists longer than four parameters.'
  StyleGuide: '#too-many-params'
  Enabled: true
  VersionAdded: '0.25'
  Max: 4
  CountKeywordArgs: false

Metrics/PerceivedComplexity:
  Description: >-
                 A complexity metric geared towards measuring complexity for a
                 human reader.
  Enabled: true
  VersionAdded: '0.25'
  Max: 7


#################### Rails #################################

# By default, the rails cops are not run. Override in project or home
# directory .rubocop.yml files, or by giving the -R/--rails option.
Rails:
  Enabled: true

Rails/ActiveSupportAliases:
  Description: >-
                  Avoid ActiveSupport aliases of standard ruby methods:
                  `String#starts_with?`, `String#ends_with?`,
                  `Array#append`, `Array#prepend`.
  Enabled: false
  VersionAdded: '0.48'

Rails/CreateTableWithTimestamps:
  Description: >-
                  Checks the migration for which timestamps are not included
                  when creating a new table.
  Enabled: false
  VersionAdded: '0.52'
  Include:
    - db/migrate/*.rb

Rails/NotNullColumn:
  Description: 'Do not add a NOT NULL column without a default value'
  Enabled: false
  VersionAdded: '0.43'
  Include:
    - db/migrate/*.rb

#################### Style ###############################

Style/Alias:
  Description: 'Use alias instead of alias_method.'
  StyleGuide: '#alias-method'
  Enabled: true
  VersionAdded: '0.9'
  VersionChanged: '0.36'
  EnforcedStyle: prefer_alias_method
  SupportedStyles:
    - prefer_alias
    - prefer_alias_method

Style/Documentation:
  Description: 'Document classes and non-namespace modules.'
  Enabled: false
  VersionAdded: '0.9'
  Exclude:
    - 'spec/**/*'
    - 'test/**/*'

Style/DoubleNegation:
  Description: 'Checks for uses of double negation (!!).'
  StyleGuide: '#no-bang-bang'
  Enabled: false
  VersionAdded: '0.19'

Style/StringLiterals:
  Description: 'Checks if uses of quotes match the configured preference.'
  StyleGuide: '#consistent-string-literals'
  Enabled: true
  VersionAdded: '0.9'
  VersionChanged: '0.36'
  EnforcedStyle: double_quotes
  SupportedStyles:
    - single_quotes
    - double_quotes
  # If `true`, strings which span multiple lines using `\` for continuation must
  # use the same type of quotes on each line.
  ConsistentQuotesInMultiline: false

Style/SymbolArray:
  Description: 'Use %i or %I for arrays of symbols.'
  StyleGuide: '#percent-i'
  Enabled: true
  VersionAdded: '0.9'
  VersionChanged: '0.49'
  EnforcedStyle: percent
  MinSize: 4
  SupportedStyles:
    - percent
    - brackets