Created a shared Rubocop configuration

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+.DS_Store

.rubocop.yml

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+inherit_from: default.yml

Gemfile

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+source "https://rubygems.org"
+
+# Specify dependencies in iex-style.gemspec
+gemspec

LICENSE

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+MIT License
+
+Copyright (c) 2020 InterExchange.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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 # iex-style
 
 InterExchange shared style configs.
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+group :test, :development do
+  gem "iex-style"
+end
+```
+
+Or, for a Ruby library, add this to your gemspec:
+
+```ruby
+spec.add_development_dependency "iex-style"
+```
+
+And then run:
+
+```bash
+$ bundle install
+```
+
+## Usage
+
+Create a `.rubocop.yml` with the following directives:
+
+```yaml
+inherit_gem:
+  iex-style:
+    - default.yml
+```
+
+Now, run:
+
+```bash
+$ bundle exec rubocop
+```
+
+You do not need to include rubocop directly in your application's dependencies. iex-style will include a specific version of `rubocop` that is shared across all projects.

Rakefile

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+require 'bundler/gem_tasks'

default.yml

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+AllCops:
+  Exclude:
+    - 'db/schema.rb'
+    - 'db/migrate/**/*.rb'
+
+Layout/ArgumentAlignment:
+  EnforcedStyle: with_fixed_indentation
+Layout/ParameterAlignment:
+  EnforcedStyle: with_fixed_indentation
+Layout/DotPosition:
+  EnforcedStyle: trailing
+Layout/EmptyLinesAroundAttributeAccessor:
+  Enabled: true
+Layout/FirstArrayElementIndentation:
+  EnforcedStyle: consistent
+Layout/LineLength:
+  Enabled: false
+Layout/MultilineMethodCallBraceLayout:
+  EnforcedStyle: new_line
+Layout/MultilineMethodCallIndentation:
+  EnforcedStyle: indented
+Layout/MultilineOperationIndentation:
+  Enabled: false
+Layout/SpaceAroundMethodCallOperator:
+  Enabled: true
+Layout/SpaceBeforeFirstArg:
+  Enabled: true
+Layout/SpaceInLambdaLiteral:
+  EnforcedStyle: require_space
+Layout/SpaceInsideStringInterpolation:
+  EnforcedStyle: space
+
+Lint/AmbiguousBlockAssociation:
+  Exclude:
+    - 'spec/**/*.rb'
+    - 'features/**/*.rb'
+Lint/RaiseException:
+  Enabled: true
+Lint/StructNewOverride:
+  Enabled: true
+
+Metrics/AbcSize:
+  Exclude:
+    - 'config/**/*.rb'
+Metrics/BlockLength:
+  Exclude:
+    - 'config/**/*.rb'
+    - 'db/seeds/*'
+    - 'features/**/*.rb'
+    - 'lib/factories/**/*.rb'
+    - 'lib/tasks/**/*.rake'
+    - 'spec/**/*.rb'
+Metrics/BlockNesting:
+  Exclude:
+    - 'features/**/*.rb'
+    - 'spec/**/*.rb'
+Metrics/MethodLength:
+  Enabled: false
+Metrics/ModuleLength:
+  Enabled: false
+
+# While this might be reasonable for models, there are plenty of times where prefixing with get
+# in controllers makes perfect sense. EG: #get_layout
+Naming/AccessorMethodName:
+  Enabled: true
+  Exclude:
+    - 'app/controllers/**/*.rb'
+Naming/MemoizedInstanceVariableName:
+  Enabled: false
+Naming/VariableNumber:
+  Enabled: false
+
+Security/Eval:
+  Exclude:
+    - 'spec/**/*.rb'
+    - 'features/**/*.rb'
+Style/AccessModifierDeclarations:
+  EnforcedStyle: inline
+Style/AndOr:
+  Enabled: false
+Style/ClassAndModuleChildren:
+  Enabled: false
+Style/CollectionMethods:
+  Enabled: false
+Style/Documentation:
+  Enabled: false
+Style/DoubleNegation:
+  Enabled: false
+Style/EmptyMethod:
+  Enabled: false
+Style/ExponentialNotation:
+  Enabled: true
+Style/FormatStringToken:
+  Exclude:
+    - 'config/**/*.rb'
+Style/FrozenStringLiteralComment:
+  EnforcedStyle: never
+Style/GuardClause:
+  Enabled: false
+Style/HashEachMethods:
+  Enabled: true
+Style/HashTransformKeys:
+  Enabled: true
+Style/HashTransformValues:
+  Enabled: true
+Style/IdenticalConditionalBranches:
+  Exclude:
+    - 'spec/**/*.rb'
+Style/IfUnlessModifier:
+  Enabled: false
+Style/Lambda:
+  EnforcedStyle: literal
+Style/NegatedIf:
+  Enabled: false
+Style/NumericLiterals:
+  Exclude:
+    - 'lib/tasks/data/fix.rake'
+Style/NumericPredicate:
+  Enabled: false
+Style/ParallelAssignment:
+  Enabled: false
+Style/RegexpLiteral:
+  AllowInnerSlashes: false
+  EnforcedStyle: mixed
+Style/SlicingWithRange:
+  Enabled: true
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+Style/SymbolArray:
+  EnforcedStyle: brackets
+Style/TernaryParentheses:
+  EnforcedStyle: require_parentheses_when_complex
+Style/TrailingCommaInArguments:
+  EnforcedStyleForMultiline: consistent_comma
+Style/TrailingCommaInArrayLiteral:
+  EnforcedStyleForMultiline: consistent_comma
+Style/TrailingCommaInHashLiteral:
+  EnforcedStyleForMultiline: consistent_comma
+Style/TrailingUnderscoreVariable:
+  Enabled: false
+Style/WordArray:
+  Enabled: false
+Style/YodaCondition:
+  Enabled: false

iex-style.gemspec

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+# coding: utf-8
+lib = File.expand_path("../lib", __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require "iex/style/version"
+
+Gem::Specification.new do |spec|
+  spec.name          = "iex-style"
+  spec.version       = IEX::Style::VERSION
+  spec.authors       = ["InterExchange"]
+  spec.email         = ["[email protected]"]
+
+  spec.summary       = "InterExchange Rails shared style configurations."
+  spec.homepage      = "https://github.com/interexchange/iex-style"
+
+  # Prevent pushing this gem to RubyGems.org. To allow pushes either set the "allowed_push_host"
+  # to allow pushing to a single host or delete this section to allow pushing to any host.
+  if spec.respond_to?(:metadata)
+    spec.metadata["allowed_push_host"] = "https://rubygems.org"
+  else
+    raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
+  end
+
+  spec.files         = `git ls-files -z`.split("\x0").reject do |f|
+    f.match(%r{^(test|spec|features)/})
+  end
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "rubocop", "~> 0.83.0" # Limited by Hound support
+  spec.add_development_dependency "bundler"
+  spec.add_development_dependency "rake"
+end

lib/iex/style.rb

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+require "iex/style/version"
+
+module IEX
+  module Style
+    # Nothing to see here.
+  end
+end

lib/iex/style/version.rb

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+module IEX
+  module Style
+    VERSION = "1.0.0".freeze
+  end
+end