require:
  - rubocop-rails
  - rubocop-rspec
  - rubocop-performance

AllCops:
  TargetRubyVersion: 2.3
  DisplayCopNames: true

# Do not sort gems in Gemfile, since we are grouping them by functionality.
Bundler/OrderedGems:
  Enabled: false

# Add a comment before each gem in Gemfile.
Bundler/GemComment:
  Enabled: true

# Trailing commas are required on multiline method arguments.
Style/TrailingCommaInArguments:
  EnforcedStyleForMultiline: comma

# Trailing commas are required in multiline arrays.
Style/TrailingCommaInArrayLiteral:
  EnforcedStyleForMultiline: comma

# Trailing commas are required in multiline hashes.
Style/TrailingCommaInHashLiteral:
  EnforcedStyleForMultiline: comma

# Allow indenting multiline chained operations.
Layout/MultilineMethodCallIndentation:
  EnforcedStyle: indented

# Allow empty lines around blocks in specs.
Layout/EmptyLinesAroundBlockBody:
  Exclude:
    - spec/**/*

# Allow not adding parentheses around blocks in DSLs.
# E.g.:
#     expect { … }.to change { … }
Lint/AmbiguousBlockAssociation:
  Exclude:
    - spec/**/*

# Limit method length (default is 10).
Metrics/MethodLength:
  Max: 15

# Limit class length (default is 100).
Metrics/ClassLength:
  Max: 200

# Allow methods called `set_*` in controllers.
Naming/AccessorMethodName:
  Exclude:
    - app/controllers/**/*

# Do not require `# frozen_string_literal: true` at the top of every file.
FrozenStringLiteralComment:
  Enabled: false

# Allow ASCII comments (e.g "…").
Style/AsciiComments:
  Enabled: false

# Do not comment the class we create, since the name should be self explanatory.
Documentation:
  Enabled: false

# Do not verify the length of the blocks in DSLs.
Metrics/BlockLength:
  Exclude:
    - spec/**/*
    - "**/*/spec/**/*"
    - lib/tasks/**/*
    - app/admin/**/*
    - config/routes.rb
    - Gemfile*
  ExcludedMethods:
    - included

# Allow any number of keyword arguments in methods.
Metrics/ParameterLists:
  CountKeywordArgs: false

# Prefer `a_variable_1` to `a_variable1`.
Naming/VariableNumber:
  EnforcedStyle: snake_case

# Prefer `== 0`, `< 0`, `> 0` to `zero?`, `negative?` or `positive?`,
# since they don't exist before Ruby 2.3 or Rails 5 and can be ambiguous.
Style/NumericPredicate:
  EnforcedStyle: comparison

# This cop by default assumes that `Rails.root.join('foo', 'bar')` works
# better under Windows than `Rails.root.join('foo/bar')`.
Rails/FilePath:
  EnforcedStyle: slashes

# Do not checks for the use of output safety calls like `html_safe` and `raw`,
# we know what we are doing.
Rails/OutputSafety:
  Enabled: false

# Allow `update_attribute`, we know when to use it.
Rails/SkipsModelValidations:
  Enabled: false

# Allow creating tables without timestamps, whe know what we are doing.
Rails/CreateTableWithTimestamps:
  Enabled: false

# Do not enforce the use of `delegate`, since small methods are easier to
# read.
Rails/Delegate:
  Enabled: false

# Allow using `allow_any_instance_of` for stubbing.
RSpec/AnyInstance:
  Enabled: false

# Allow `let!` to setup test data in specs.
RSpec/LetSetup:
  Enabled: false

# Allow a nesting of up to 5 of describe/context blocks (default is 3).
RSpec/NestedGroups:
  Max: 5

# Allow any number of expectations in an example, for performance.
RSpec/MultipleExpectations:
  Enabled: false

# Allow using normal test doubles, since they are useful for mocking.
RSpec/VerifiedDoubles:
  Enabled: false

# Limit example length (default is 5).
RSpec/ExampleLength:
  Max: 10

# Allow the use of `!!` to force values into booleans.
Style/DoubleNegation:
  Enabled: false

# Prefer `change { User.count }` to `change(User, :count)`.
RSpec/ExpectChange:
  EnforcedStyle: block

# Allow template token "%{foo}" since they are used in translation keys.
Style/FormatStringToken:
  EnforcedStyle: template

# Prefer `->` to `lambda`.
Style/Lambda:
  EnforcedStyle: literal

# Allow `if !` since `unless` can be harder to read.
Style/NegatedIf:
  Enabled: false