rubocop.yml

# This is the default configuration file. Enabling and disabling is configured
# in separate files. This file adds all other parameters apart from Enabled.
#
# To fetch the latest: wget https://raw.githubusercontent.com/bbatsov/rubocop/master/config/default.yml
#
# Last updated 9/30/2016

inherit_from:
  - enabled.yml
  - disabled.yml

# Common configuration.
AllCops:
  # Include common Ruby source files.
  Include:
    - '**/*.gemspec'
    - '**/*.podspec'
    - '**/*.jbuilder'
    - '**/*.rake'
    - '**/*.opal'
    - '**/config.ru'
    - '**/Gemfile'
    - '**/Rakefile'
    - '**/Capfile'
    - '**/Guardfile'
    - '**/Podfile'
    - '**/Thorfile'
    - '**/Vagrantfile'
    - '**/Berksfile'
    - '**/Cheffile'
    - '**/Vagabondfile'
    - '**/Fastfile'
    - '**/*Fastfile'
  Exclude:
    - 'vendor/**/*'
  # Default formatter will be used if no -f/--format option is given.
  DefaultFormatter: progress
  # Cop names are not displayed in offense messages by default. Change behavior
  # by overriding DisplayCopNames, or by giving the -D/--display-cop-names
  # option.
  DisplayCopNames: false
  # 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: false
  # When specifying style guide URLs, any paths and/or fragments will be
  # evaluated relative to the base URL.
  StyleGuideBaseURL: https://github.com/bbatsov/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 in disabled.yml are enabled by default. Change
  # this behavior by overriding DisabledByDefault. When DisabledByDefault is
  # true, all cops in the default configuration are disabled, and 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.
  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. The name
  # "/tmp" is special and will be converted to the system temporary directory,
  # which is "/tmp" on Unix-like systems, but could be something else on other
  # systems.
  CacheRootDirectory: /tmp
  # The default cache root directory is /tmp, which on most systems is
  # writable by any system user. This means that it is possible for a
  # malicious user to anticipate the location of Rubocop's cache directory,
  # 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.
  # Else if .ruby-version exists and it contains an MRI version it is used.
  # Otherwise we fallback to the oldest officially supported Ruby version (2.0).
  TargetRubyVersion: ~

# Indent private/protected/public as deep as method definitions
Style/AccessModifierIndentation:
  EnforcedStyle: indent
  SupportedStyles:
    - outdent
    - indent
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Style/Alias:
  EnforcedStyle: prefer_alias
  SupportedStyles:
    - prefer_alias
    - prefer_alias_method

# Align the elements of a hash literal if they span more than one line.
Style/AlignHash:
  # 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: key
  # 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: key
  # 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: always_inspect
  SupportedLastArgumentHashStyles:
    - always_inspect
    - always_ignore
    - ignore_implicit
    - ignore_explicit

Style/AlignParameters:
  # 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_first_parameter
  SupportedStyles:
    - with_first_parameter
    - with_fixed_indentation
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Style/AndOr:
  # Whether `and` and `or` are banned only in conditionals (conditionals)
  # or completely (always).
  EnforcedStyle: always
  SupportedStyles:
    - always
    - conditionals


# Checks if usage of %() or %Q() matches configuration.
Style/BarePercentLiterals:
  EnforcedStyle: bare_percent
  SupportedStyles:
    - percent_q
    - bare_percent

Style/BlockDelimiters:
  EnforcedStyle: line_count_based
  SupportedStyles:
    # The `line_count_based` style enforces braces around single line blocks and
    # do..end around multi-line blocks.
    - line_count_based
    # The `semantic` style enforces braces around functional blocks, where the
    # primary purpose of the block is to return a value and do..end for
    # procedural blocks, where the primary purpose of the block is its
    # side-effects.
    #
    # This looks at the usage of a block's method to determine its type (e.g. is
    # the result of a `map` assigned to a variable or passed to another
    # method) but exceptions are permitted in the `ProceduralMethods`,
    # `FunctionalMethods` and `IgnoredMethods` sections below.
    - semantic
    # The `braces_for_chaining` style enforces braces around single line blocks
    # and do..end around multi-line blocks, except for multi-line blocks whose
    # return value is being chained with another method (in which case braces
    # are enforced).
    - braces_for_chaining
  ProceduralMethods:
    # Methods that are known to be procedural in nature but look functional from
    # their usage, e.g.
    #
    #   time = Benchmark.realtime do
    #     foo.bar
    #   end
    #
    # Here, the return value of the block is discarded but the return value of
    # `Benchmark.realtime` is used.
    - benchmark
    - bm
    - bmbm
    - create
    - each_with_object
    - measure
    - new
    - realtime
    - tap
    - with_object
  FunctionalMethods:
    # Methods that are known to be functional in nature but look procedural from
    # their usage, e.g.
    #
    #   let(:foo) { Foo.new }
    #
    # Here, the return value of `Foo.new` is used to define a `foo` helper but
    # doesn't appear to be used from the return value of `let`.
    - let
    - let!
    - subject
    - watch
  IgnoredMethods:
    # Methods that can be either procedural or functional and cannot be
    # categorised from their usage alone, e.g.
    #
    #   foo = lambda do |x|
    #     puts "Hello, #{x}"
    #   end
    #
    #   foo = lambda do |x|
    #     x * 100
    #   end
    #
    # Here, it is impossible to tell from the return value of `lambda` whether
    # the inner block's return value is significant.
    - lambda
    - proc
    - it

Style/BracesAroundHashParameters:
  EnforcedStyle: no_braces
  SupportedStyles:
    # The `braces` style enforces braces around all method parameters that are
    # hashes.
    - braces
    # The `no_braces` style checks that the last parameter doesn't have braces
    # around it.
    - no_braces
    # The `context_dependent` style 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.
    - context_dependent

# Indentation of `when`.
Style/CaseIndentation:
  IndentWhenRelativeTo: case
  SupportedStyles:
    - case
    - end
  IndentOneStep: false
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  # This only matters if IndentOneStep is true
  IndentationWidth: ~

Style/ClassAndModuleChildren:
  # Checks the style of children definitions at classes and modules.
  #
  # Basically there are two different styles:
  #
  # `nested` - have each child on a separate line
  #   class Foo
  #     class Bar
  #     end
  #   end
  #
  # `compact` - combine definitions as much as possible
  #   class Foo::Bar
  #   end
  #
  # The compact style is only forced, for classes / modules with one child.
  EnforcedStyle: nested
  SupportedStyles:
    - nested
    - compact

Style/ClassCheck:
  EnforcedStyle: is_a?
  SupportedStyles:
    - is_a?
    - kind_of?

# Align with the style guide.
Style/CollectionMethods:
  # Mapping from undesired method to desired_method
  # e.g. to use `detect` over `find`:
  #
  # CollectionMethods:
  #   PreferredMethods:
  #     find: detect
  PreferredMethods:
    collect: 'map'
    collect!: 'map!'
    inject: 'reduce'
    detect: 'find'
    find_all: 'select'

# Use ` or %x around command literals.
Style/CommandLiteral:
  EnforcedStyle: backticks
  # backticks: Always use backticks.
  # percent_x: Always use %x.
  # mixed: Use backticks on single-line commands, and %x on multi-line commands.
  SupportedStyles:
    - backticks
    - percent_x
    - mixed
  # If false, the cop will always recommend using %x if one or more backticks
  # are found in the command string.
  AllowInnerBackticks: false

# Checks formatting of special comments
Style/CommentAnnotation:
  Keywords:
    - TODO
    - FIXME
    - OPTIMIZE
    - HACK
    - REVIEW

Style/ConditionalAssignment:
  EnforcedStyle: assign_to_condition
  SupportedStyles:
    - assign_to_condition
    - assign_inside_condition
  # When configured to `assign_to_condition`, `SingleLineConditionsOnly`
  # will only register an offense when all branches of a condition are
  # a single line.
  # When configured to `assign_inside_condition`, `SingleLineConditionsOnly`
  # will only register an offense for assignment to a condition that has
  # at least one multiline branch.
  SingleLineConditionsOnly: true

# Checks that you have put a copyright in a comment before any code.
#
# You can override the default Notice in your .rubocop.yml file.
#
# In order to use autocorrect, you must supply a value for the
# AutocorrectNotice key that matches the regexp Notice.  A blank
# AutocorrectNotice will cause an error during autocorrect.
#
# Autocorrect will add a copyright notice in a comment at the top
# of the file immediately after any shebang or encoding comments.
#
# Example rubocop.yml:
#
# Style/Copyright:
#   Enabled: true
#   Notice: 'Copyright (\(c\) )?2015 Yahoo! Inc'
#   AutocorrectNotice: '# Copyright (c) 2015 Yahoo! Inc.'
#
Style/Copyright:
  Notice: '^Copyright (\(c\) )?2[0-9]{3} .+'
  AutocorrectNotice: ''

Style/DocumentationMethod:
  RequireForNonPublicMethods: false

# Multi-line method chaining should be done with leading dots.
Style/DotPosition:
  EnforcedStyle: leading
  SupportedStyles:
    - leading
    - trailing

# Warn on empty else statements
# empty - warn only on empty else
# nil - warn on else with nil in it
# both - warn on empty else and else with nil in it
Style/EmptyElse:
  EnforcedStyle: both
  SupportedStyles:
    - empty
    - nil
    - both

# Use empty lines between defs.
Style/EmptyLineBetweenDefs:
  # If true, this parameter means that single line method definitions don't
  # need an empty line between them.
  AllowAdjacentOneLineDefs: false

Style/EmptyLinesAroundBlockBody:
  EnforcedStyle: no_empty_lines
  SupportedStyles:
    - empty_lines
    - no_empty_lines

Style/EmptyLinesAroundClassBody:
  EnforcedStyle: no_empty_lines
  SupportedStyles:
    - empty_lines
    - no_empty_lines

Style/EmptyLinesAroundModuleBody:
  EnforcedStyle: no_empty_lines
  SupportedStyles:
    - empty_lines
    - no_empty_lines

# Checks whether the source file has a utf-8 encoding comment or not
# AutoCorrectEncodingComment must match the regex
# /#.*coding\s?[:=]\s?(?:UTF|utf)-8/
Style/Encoding:
  EnforcedStyle: never
  SupportedStyles:
    - when_needed
    - always
    - never
  AutoCorrectEncodingComment: '# encoding: utf-8'

Style/ExtraSpacing:
  # When true, allows most uses of extra spacing if the intent is to align
  # things with the previous or next line, not counting empty lines or comment
  # lines.
  AllowForAlignment: true
  # When true, forces the alignment of = in assignments on consecutive lines.
  ForceEqualSignAlignment: false

Style/FileName:
  # File names listed in AllCops:Include are excluded by default. Add extra
  # excludes here.
  Exclude: []
  # When true, requires that each source file should define a class or module
  # with a name which matches the file name (converted to ... case).
  # It further expects it to be nested inside modules which match the names
  # of subdirectories in its path.
  ExpectMatchingDefinition: false
  # If non-nil, expect all source file names to match the following regex.
  # Only the file name itself is matched, not the entire file path.
  # Use anchors as necessary if you want to match the entire name rather than
  # just a part of it.
  Regex: ~
  # With `IgnoreExecutableScripts` set to `true`, this cop does not
  # report offending filenames for executable scripts (i.e. source
  # files with a shebang in the first line).
  IgnoreExecutableScripts: true

Style/FirstParameterIndentation:
  EnforcedStyle: special_for_inner_method_call_in_parentheses
  SupportedStyles:
    # The first parameter should always be indented one step more than the
    # preceding line.
    - consistent
    # 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 Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

# Checks use of for or each in multiline loops.
Style/For:
  EnforcedStyle: each
  SupportedStyles:
    - for
    - each

# Enforce the method used for string formatting.
Style/FormatString:
  EnforcedStyle: format
  SupportedStyles:
    - format
    - sprintf
    - percent

Style/FrozenStringLiteralComment:
  EnforcedStyle: when_needed
  SupportedStyles:
    # `when_needed` will add the frozen string literal comment to files
    # only when the `TargetRubyVersion` is set to 2.3+.
    - when_needed
    # `always` will always add the frozen string literal comment to a file
    # regardless of the Ruby version or if `freeze` or `<<` are called on a
    # string literal. If you run code against multiple versions of Ruby, it is
    # possible that this will create errors in Ruby 2.3.0+.
    - always

# Built-in global variables are allowed by default.
Style/GlobalVars:
  AllowedVariables: []

# `MinBodyLength` defines the number of lines of the a body of an if / unless
# needs to have to trigger this cop
Style/GuardClause:
  MinBodyLength: 1

Style/HashSyntax:
  EnforcedStyle: ruby19
  SupportedStyles:
    # checks for 1.9 syntax (e.g. {a: 1}) for all symbol keys
    - ruby19
    # checks for hash rocket syntax for all hashes
    - hash_rockets
    # forbids mixed key syntaxes (e.g. {a: 1, :b => 2})
    - no_mixed_keys
    # enforces both ruby19 and no_mixed_keys styles
    - ruby19_no_mixed_keys
  # Force hashes that have a symbol value to use hash rockets
  UseHashRocketsWithSymbolValues: false
  # Do not suggest { a?: 1 } over { :a? => 1 } in ruby19 style
  PreferHashRocketsForNonAlnumEndingSymbols: false

Style/IfUnlessModifier:
  MaxLineLength: 80

Style/IndentationConsistency:
  # 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

Style/IndentationWidth:
  # Number of spaces for each indentation level.
  Width: 2

# Checks the indentation of the first element in an array literal.
Style/IndentArray:
  # 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: special_inside_parentheses
  SupportedStyles:
    - special_inside_parentheses
    - consistent
    - align_brackets
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

# Checks the indentation of assignment RHS, when on a different line from LHS
Style/IndentAssignment:
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

# Checks the indentation of the first key in a hash literal.
Style/IndentHash:
  # 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: special_inside_parentheses
  SupportedStyles:
    - special_inside_parentheses
    - consistent
    - align_braces
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Style/Lambda:
  EnforcedStyle: line_count_dependent
  SupportedStyles:
    - line_count_dependent
    - lambda
    - literal

Style/LambdaCall:
  EnforcedStyle: call
  SupportedStyles:
    - call
    - braces

Style/Next:
  # With `always` all conditions at the end of an iteration needs to be
  # replaced by next - with `skip_modifier_ifs` the modifier if like this one
  # are ignored: [1, 2].each { |a| return 'yes' if a == 1 }
  EnforcedStyle: skip_modifier_ifs
  # `MinBodyLength` defines the number of lines of the a body of an if / unless
  # needs to have to trigger this cop
  MinBodyLength: 3
  SupportedStyles:
    - skip_modifier_ifs
    - always

Style/NonNilCheck:
  # With `IncludeSemanticChanges` set to `true`, this cop reports offenses for
  # `!x.nil?` and autocorrects that and `x != nil` to solely `x`, which is
  # **usually** OK, but might change behavior.
  #
  # With `IncludeSemanticChanges` set to `false`, this cop does not report
  # offenses for `!x.nil?` and does no changes that might change behavior.
  IncludeSemanticChanges: false

Style/NumericPredicate:
  EnforcedStyle: predicate
  SupportedStyles:
    - predicate
    - comparison
  # Exclude RSpec specs because assertions like `expect(1).to be > 0` cause
  # false positives.
  Exclude:
    - 'spec/**/*'

Style/MethodDefParentheses:
  EnforcedStyle: require_parentheses
  SupportedStyles:
    - require_parentheses
    - require_no_parentheses
    - require_no_parentheses_except_multiline

Style/MethodName:
  EnforcedStyle: snake_case
  SupportedStyles:
    - snake_case
    - camelCase

Style/ModuleFunction:
  EnforcedStyle: module_function
  SupportedStyles:
    - module_function
    - extend_self

Style/MultilineArrayBraceLayout:
  EnforcedStyle: symmetrical
  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 element
    - symmetrical
    - new_line
    - same_line

Style/MultilineAssignmentLayout:
  # The types of assignments which are subject to this rule.
  SupportedTypes:
    - block
    - case
    - class
    - if
    - kwbegin
    - module
  EnforcedStyle: new_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

Style/MultilineHashBraceLayout:
  EnforcedStyle: symmetrical
  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 same line as last element
    - symmetrical
    - new_line
    - same_line

Style/MultilineMethodCallBraceLayout:
  EnforcedStyle: symmetrical
  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 argument
    - symmetrical
    - new_line
    - same_line

Style/MultilineMethodCallIndentation:
  EnforcedStyle: aligned
  SupportedStyles:
    - aligned
    - indented
    - indented_relative_to_receiver
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Style/MultilineMethodDefinitionBraceLayout:
  EnforcedStyle: symmetrical
  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

Style/MultilineOperationIndentation:
  EnforcedStyle: aligned
  SupportedStyles:
    - aligned
    - indented
  # By default, the indentation width from Style/IndentationWidth is used
  # But it can be overridden by setting this parameter
  IndentationWidth: ~

Style/NumericLiterals:
  MinDigits: 5

Style/NumericLiteralPrefix:
  EnforcedOctalStyle: zero_with_o
  SupportedOctalStyles:
    - zero_with_o
    - zero_only

Style/OptionHash:
  # A list of parameter names that will be flagged by this cop.
  SuspiciousParamNames:
    - options
    - opts
    - args
    - params
    - parameters

# Allow safe assignment in conditions.
Style/ParenthesesAroundCondition:
  AllowSafeAssignment: true

Style/PercentLiteralDelimiters:
  PreferredDelimiters:
    '%':  ()
    '%i': ()
    '%q': ()
    '%Q': ()
    '%r': '{}'
    '%s': ()
    '%w': ()
    '%W': ()
    '%x': ()

Style/PercentQLiterals:
  EnforcedStyle: lower_case_q
  SupportedStyles:
    - lower_case_q # Use %q when possible, %Q when necessary
    - upper_case_q # Always use %Q

Style/PredicateName:
  # Predicate name prefixes.
  NamePrefix:
    - is_
    - has_
    - have_
  # Predicate name prefixes that should be removed.
  NamePrefixBlacklist:
    - is_
    - has_
    - have_
  # Predicate names which, despite having a blacklisted prefix, or no ?,
  # should still be accepted
  NameWhitelist:
    - is_a?
  # Exclude Rspec specs because there is a strong convetion to write spec
  # helpers in the form of `have_something` or `be_something`.
  Exclude:
    - 'spec/**/*'

Style/RaiseArgs:
  EnforcedStyle: exploded
  SupportedStyles:
    - compact # raise Exception.new(msg)
    - exploded # raise Exception, msg

Style/RedundantReturn:
  # When true allows code like `return x, y`.
  AllowMultipleReturnValues: false

# Use / or %r around regular expressions.
Style/RegexpLiteral:
  EnforcedStyle: slashes
  # slashes: Always use slashes.
  # percent_r: Always use %r.
  # mixed: Use slashes on single-line regexes, and %r on multi-line regexes.
  SupportedStyles:
    - slashes
    - percent_r
    - mixed
  # If false, the cop will always recommend using %r if one or more slashes
  # are found in the regexp string.
  AllowInnerSlashes: false

Style/SafeNavigation:
  # Safe navigation may cause a statement to start returning `nil` in addition
  # to whatever it used to return.
  ConvertCodeThatCanStartToReturnNil: false

Style/Semicolon:
  # Allow ; to separate several expressions on the same line.
  AllowAsExpressionSeparator: false

Style/SignalException:
  EnforcedStyle: only_raise
  SupportedStyles:
    - only_raise
    - only_fail
    - semantic

Style/SingleLineBlockParams:
  Methods:
    - reduce:
        - a
        - e
    - inject:
        - a
        - e

Style/SingleLineMethods:
  AllowIfMethodIsEmpty: true

Style/SpaceBeforeFirstArg:
  # When true, allows most uses of extra spacing if the intent is to align
  # things with the previous or next line, not counting empty lines or comment
  # lines.
  AllowForAlignment: true

Style/SpecialGlobalVars:
  EnforcedStyle: use_english_names
  SupportedStyles:
    - use_perl_names
    - use_english_names

Style/StabbyLambdaParentheses:
  EnforcedStyle: require_parentheses
  SupportedStyles:
    - require_parentheses
    - require_no_parentheses

Style/StringLiterals:
  EnforcedStyle: single_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/StringLiteralsInInterpolation:
  EnforcedStyle: single_quotes
  SupportedStyles:
    - single_quotes
    - double_quotes

Style/StringMethods:
  # Mapping from undesired method to desired_method
  # e.g. to use `to_sym` over `intern`:
  #
  # StringMethods:
  #   PreferredMethods:
  #     intern: to_sym
  PreferredMethods:
    intern: to_sym

Style/SpaceAroundBlockParameters:
  EnforcedStyleInsidePipes: no_space
  SupportedStyles:
    - space
    - no_space

Style/SpaceAroundEqualsInParameterDefault:
  EnforcedStyle: space
  SupportedStyles:
    - space
    - no_space

Style/SpaceAroundOperators:
  # When true, allows most uses of extra spacing if the intent is to align
  # with an operator on the previous or next line, not counting empty lines
  # or comment lines.
  AllowForAlignment: true

Style/SpaceBeforeBlockBraces:
  EnforcedStyle: space
  SupportedStyles:
    - space
    - no_space

Style/SpaceInsideBlockBraces:
  EnforcedStyle: space
  SupportedStyles:
    - space
    - no_space
  # Valid values are: space, no_space
  EnforcedStyleForEmptyBraces: no_space
  # Space between { and |. Overrides EnforcedStyle if there is a conflict.
  SpaceBeforeBlockParameters: true

Style/SpaceInsideHashLiteralBraces:
  EnforcedStyle: space
  EnforcedStyleForEmptyBraces: 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

Style/SpaceInsideStringInterpolation:
  EnforcedStyle: no_space
  SupportedStyles:
    - space
    - no_space

Style/SymbolArray:
  EnforcedStyle: percent
  SupportedStyles:
    - percent
    - brackets

Style/SymbolProc:
  # A list of method names to be ignored by the check.
  # The names should be fairly unique, otherwise you'll end up ignoring lots of code.
  IgnoredMethods:
    - respond_to
    - define_method

Style/TernaryParentheses:
  EnforcedStyle: require_no_parentheses
  SupportedStyles:
    - require_parentheses
    - require_no_parentheses
  AllowSafeAssignment: true

Style/TrailingBlankLines:
  EnforcedStyle: final_newline
  SupportedStyles:
    - final_newline
    - final_blank_line

Style/TrailingCommaInArguments:
  # If `comma`, the cop requires a comma after the last argument, but only for
  # parenthesized method calls where each argument is on its own line.
  # If `consistent_comma`, the cop requires a comma after the last argument,
  # for all parenthesized method calls with arguments.
  EnforcedStyleForMultiline: no_comma
  SupportedStyles:
    - comma
    - consistent_comma
    - no_comma

Style/TrailingCommaInLiteral:
  # If `comma`, the cop requires a comma after the last item in an array or
  # hash, but only when each item is on its own line.
  # If `consistent_comma`, the cop requires a comma after the last item of all
  # non-empty array and hash literals.
  EnforcedStyleForMultiline: no_comma
  SupportedStyles:
    - comma
    - consistent_comma
    - no_comma

# TrivialAccessors requires exact name matches and doesn't allow
# predicated methods by default.
Style/TrivialAccessors:
  # When set to false the cop will suggest the use of accessor methods
  # in situations like:
  #
  # def name
  #   @other_name
  # end
  #
  # This way you can uncover "hidden" attributes in your code.
  ExactNameMatch: true
  AllowPredicates: true
  # Allows trivial writers that don't end in an equal sign. e.g.
  #
  # def on_exception(action)
  #   @on_exception=action
  # end
  # on_exception :restart
  #
  # Commonly used in DSLs
  AllowDSLWriters: false
  IgnoreClassMethods: false
  Whitelist:
    - to_ary
    - to_a
    - to_c
    - to_enum
    - to_h
    - to_hash
    - to_i
    - to_int
    - to_io
    - to_open
    - to_path
    - to_proc
    - to_r
    - to_regexp
    - to_str
    - to_s
    - to_sym

Style/VariableName:
  EnforcedStyle: snake_case
  SupportedStyles:
    - snake_case
    - camelCase

Style/VariableNumber:
  EnforcedStyle: normalcase
  SupportedStyles:
    - snake_case
    - normalcase
    - non_integer

Style/WhileUntilModifier:
  MaxLineLength: 80

# WordArray enforces how array literals of word-like strings should be expressed.
Style/WordArray:
  EnforcedStyle: percent
  SupportedStyles:
    # percent style: %w(word1 word2)
    - percent
    # bracket style: ['word1', 'word2']
    - brackets
  # The MinSize option causes the WordArray rule to be ignored for arrays
  # smaller than a certain size.  The rule is only applied to arrays
  # whose element count is greater than or equal to MinSize.
  MinSize: 0
  # The regular expression WordRegex decides what is considered a word.
  WordRegex: !ruby/regexp '/\A[\p{Word}\n\t]+\z/'

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

Metrics/AbcSize:
  # The ABC size is a calculated magnitude, so this number can be an Integer or
  # a Float.
  Max: 15

Metrics/BlockNesting:
  Max: 3

Metrics/ClassLength:
  CountComments: false  # count full line comments?
  Max: 100

Metrics/ModuleLength:
  CountComments: false  # count full line comments?
  Max: 100

# Avoid complex methods.
Metrics/CyclomaticComplexity:
  Max: 6

Metrics/LineLength:
  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

Metrics/MethodLength:
  CountComments: false  # count full line comments?
  Max: 10

Metrics/ParameterLists:
  Max: 5
  CountKeywordArgs: true

Metrics/PerceivedComplexity:
  Max: 7

##################### Lint ##################################

# Allow safe assignment in conditions.
Lint/AssignmentInCondition:
  AllowSafeAssignment: true

# checks whether the end keywords are aligned properly for `do` `end` blocks.
Lint/BlockAlignment:
  # 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.
  AlignWith: either
  SupportedStyles:
    - either
    - start_of_block
    - start_of_line

# Align ends correctly.
Lint/EndAlignment:
  # 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.
  AlignWith: keyword
  SupportedStyles:
    - keyword
    - variable
    - start_of_line
  AutoCorrect: false

Lint/DefEndAlignment:
  # The value `def` means that `end` should be aligned with the def keyword.
  # The value `start_of_line` means that `end` should be aligned with method
  # calls like `private`, `public`, etc, if present in front of the `def`
  # keyword on the same line.
  AlignWith: start_of_line
  SupportedStyles:
    - start_of_line
    - def
  AutoCorrect: false

Lint/InheritException:
  # The default base class in favour of `Exception`.
  EnforcedStyle: runtime_error
  SupportedStyles:
    - runtime_error
    - standard_error

# Checks for unused block arguments
Lint/UnusedBlockArgument:
  IgnoreEmptyBlocks: true
  AllowUnusedKeywordArguments: false

# Checks for unused method arguments.
Lint/UnusedMethodArgument:
  AllowUnusedKeywordArguments: false
  IgnoreEmptyMethods: true

##################### Performance ############################

Performance/RedundantMerge:
  # Max number of key-value pairs to consider an offense
  MaxKeyValuePairs: 2

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

Rails/ActionFilter:
  EnforcedStyle: action
  SupportedStyles:
    - action
    - filter
  Include:
    - app/controllers/**/*.rb

Rails/Date:
  # The value `strict` disallows usage of `Date.today`, `Date.current`,
  # `Date#to_time` etc.
  # The value `flexible` allows usage of `Date.current`, `Date.yesterday`, etc
  # (but not `Date.today`) which are overridden by ActiveSupport to handle current
  # time zone.
  EnforcedStyle: flexible
  SupportedStyles:
    - strict
    - flexible

Rails/Exit:
  Include:
    - app/**/*.rb
    - config/**/*.rb
    - lib/**/*.rb
  Exclude:
    - lib/**/*.rake

Rails/FindBy:
  Include:
    - app/models/**/*.rb

Rails/FindEach:
  Include:
    - app/models/**/*.rb

Rails/HasAndBelongsToMany:
  Include:
    - app/models/**/*.rb

Rails/NotNullColumn:
  Include:
    - db/migrate/*.rb

Rails/Output:
  Include:
    - app/**/*.rb
    - config/**/*.rb
    - db/**/*.rb
    - lib/**/*.rb

Rails/ReadWriteAttribute:
  Include:
    - app/models/**/*.rb

Rails/RequestReferer:
  EnforcedStyle: referer
  SupportedStyles:
    - referer
    - referrer

Rails/SafeNavigation:
  # This will convert usages of `try` to use safe navigation as well as `try!`.
  # `try` and `try!` work slighly differently. `try!` and safe navigation will
  # both raise a `NoMethodError` if the receiver of the method call does not
  # implement the intended method. `try` will not raise an exception for this.
  ConvertTry: false

Rails/ScopeArgs:
  Include:
    - app/models/**/*.rb

Rails/TimeZone:
  # The value `strict` means that `Time` should be used with `zone`.
  # The value `flexible` allows usage of `in_time_zone` instead of `zone`.
  EnforcedStyle: flexible
  SupportedStyles:
    - strict
    - flexible

Rails/UniqBeforePluck:
  EnforcedMode: conservative
  SupportedModes:
    - conservative
    - aggressive
  AutoCorrect: false

Rails/Validation:
  Include:
    - app/models/**/*.rb