Add rubocop to spot code related issues

.rubocop.yml

@@ -0,0 +1,174 @@
+# The behavior of RuboCop can be controlled via the .rubocop.yml
+# configuration file. It makes it possible to enable/disable
+# certain cops (checks) and to alter their behavior if they accept
+# any parameters. The file can be placed either in your home
+# directory or in some project directory.
+#
+# RuboCop will start looking for the configuration file in the directory
+# where the inspected file is and continue its way up to the root directory.
+#
+# See https://docs.rubocop.org/rubocop/configuration
+
+inherit_from: .rubocop_todo.yml
+
+require:
+  - rubocop-minitest
+  - rubocop-rake
+
+AllCops:
+  Exclude:
+    - lib/bibtex/name_parser.rb # automatically generated by Racc
+    - lib/bibtex/parser.rb # automatically generated by Racc
+
+# Recently added RuboCop cops
+
+Gemspec/DateAssignment: # new in 1.10
+  Enabled: true
+Gemspec/RequireMFA: # new in 1.23
+  Enabled: true
+Layout/LineEndStringConcatenationIndentation: # new in 1.18
+  Enabled: true
+Layout/SpaceBeforeBrackets: # new in 1.7
+  Enabled: true
+Lint/AmbiguousAssignment: # new in 1.7
+  Enabled: true
+Lint/AmbiguousOperatorPrecedence: # new in 1.21
+  Enabled: true
+Lint/AmbiguousRange: # new in 1.19
+  Enabled: true
+Lint/DeprecatedConstants: # new in 1.8
+  Enabled: true
+Lint/DuplicateBranch: # new in 1.3
+  Enabled: true
+Lint/DuplicateRegexpCharacterClassElement: # new in 1.1
+  Enabled: true
+Lint/EmptyBlock: # new in 1.1
+  Enabled: true
+Lint/EmptyClass: # new in 1.3
+  Enabled: true
+Lint/EmptyInPattern: # new in 1.16
+  Enabled: true
+Lint/IncompatibleIoSelectWithFiberScheduler: # new in 1.21
+  Enabled: true
+Lint/LambdaWithoutLiteralBlock: # new in 1.8
+  Enabled: true
+Lint/NoReturnInBeginEndBlocks: # new in 1.2
+  Enabled: true
+Lint/NumberedParameterAssignment: # new in 1.9
+  Enabled: true
+Lint/OrAssignmentToConstant: # new in 1.9
+  Enabled: true
+Lint/RedundantDirGlobSort: # new in 1.8
+  Enabled: true
+Lint/RefinementImportMethods: # new in 1.27
+  Enabled: true
+Lint/RequireRelativeSelfPath: # new in 1.22
+  Enabled: true
+Lint/SymbolConversion: # new in 1.9
+  Enabled: true
+Lint/ToEnumArguments: # new in 1.1
+  Enabled: true
+Lint/TripleQuotes: # new in 1.9
+  Enabled: true
+Lint/UnexpectedBlockArity: # new in 1.5
+  Enabled: true
+Lint/UnmodifiedReduceAccumulator: # new in 1.1
+  Enabled: true
+Lint/UselessRuby2Keywords: # new in 1.23
+  Enabled: true
+Naming/BlockForwarding: # new in 1.24
+  Enabled: true
+Security/CompoundHash: # new in 1.28
+  Enabled: true
+Security/IoMethods: # new in 1.22
+  Enabled: true
+Style/ArgumentsForwarding: # new in 1.1
+  Enabled: true
+Style/CollectionCompact: # new in 1.2
+  Enabled: true
+Style/DocumentDynamicEvalDefinition: # new in 1.1
+  Enabled: true
+Style/EndlessMethod: # new in 1.8
+  Enabled: true
+Style/FetchEnvVar: # new in 1.28
+  Enabled: true
+Style/FileRead: # new in 1.24
+  Enabled: true
+Style/FileWrite: # new in 1.24
+  Enabled: true
+Style/HashConversion: # new in 1.10
+  Enabled: true
+Style/HashExcept: # new in 1.7
+  Enabled: true
+Style/IfWithBooleanLiteralBranches: # new in 1.9
+  Enabled: true
+Style/InPatternThen: # new in 1.16
+  Enabled: true
+Style/MapToHash: # new in 1.24
+  Enabled: true
+Style/MultilineInPatternThen: # new in 1.16
+  Enabled: true
+Style/NegatedIfElseCondition: # new in 1.2
+  Enabled: true
+Style/NestedFileDirname: # new in 1.26
+  Enabled: true
+Style/NilLambda: # new in 1.3
+  Enabled: true
+Style/NumberedParameters: # new in 1.22
+  Enabled: true
+Style/NumberedParametersLimit: # new in 1.22
+  Enabled: true
+Style/ObjectThen: # new in 1.28
+  Enabled: true
+Style/OpenStructUse: # new in 1.23
+  Enabled: true
+Style/QuotedSymbols: # new in 1.16
+  Enabled: true
+Style/RedundantArgument: # new in 1.4
+  Enabled: true
+Style/RedundantInitialize: # new in 1.27
+  Enabled: true
+Style/RedundantSelfAssignmentBranch: # new in 1.19
+  Enabled: true
+Style/SelectByRegexp: # new in 1.22
+  Enabled: true
+Style/StringChars: # new in 1.12
+  Enabled: true
+Style/SwapValues: # new in 1.1
+  Enabled: true
+Minitest/AssertInDelta: # new in 0.10
+  Enabled: true
+Minitest/AssertKindOf: # new in 0.10
+  Enabled: true
+Minitest/AssertOutput: # new in 0.10
+  Enabled: true
+Minitest/AssertPathExists: # new in 0.10
+  Enabled: true
+Minitest/AssertPredicate: # new in 0.18
+  Enabled: true
+Minitest/AssertSilent: # new in 0.10
+  Enabled: true
+Minitest/AssertWithExpectedArgument: # new in 0.11
+  Enabled: true
+Minitest/AssertionInLifecycleHook: # new in 0.10
+  Enabled: true
+Minitest/DuplicateTestRun: # new in 0.19
+  Enabled: true
+Minitest/LiteralAsActualArgument: # new in 0.10
+  Enabled: true
+Minitest/MultipleAssertions: # new in 0.10
+  Enabled: true
+Minitest/RefuteInDelta: # new in 0.10
+  Enabled: true
+Minitest/RefuteKindOf: # new in 0.10
+  Enabled: true
+Minitest/RefutePathExists: # new in 0.10
+  Enabled: true
+Minitest/RefutePredicate: # new in 0.18
+  Enabled: true
+Minitest/TestMethodName: # new in 0.10
+  Enabled: true
+Minitest/UnreachableAssertion: # new in 0.14
+  Enabled: true
+Minitest/UnspecifiedException: # new in 0.10
+  Enabled: true