V0.49.0

New features

• #117: Add --parallel option for running RuboCop in multiple processes or threads. (@jonas054)
• Add auto-correct support to Style/MixinGrouping. (@rrosenblum)
• #4236: Add new Rails/ApplicationJob and Rails/ApplicationRecord cops. (@tjwp)
• #4078: Add new Performance/Caller cop. (@alpaca-tc)
• #4314: Check slow hash accessing in Array#sort by Performance/CompareWithBlock. (@pocke)
• #3438: Add new Style/FormatStringToken cop. (@backus)
• #4342: Add new Lint/ScriptPermission cop. (@yhirano55)
• #4145: Add new Style/YodaCondition cop. (@smakagon)
• #4403: Add public API Cop.autocorrect_incompatible_with for specifying other cops that should not autocorrect together. (@backus)
• #4354: Add autocorrect to Style/FormatString. (@hoshinotsuyoshi)
• #4021: Add new Style/MultipleComparison cop. (@dabroz)
• New Lint/RescueType cop. (@rrosenblum)

Changes

• #4262: Add new MinSize configuration to Style/SymbolArray, consistent with the same configuration in Style/WordArray. (@scottmatthewman)
• #3400: Remove auto-correct support from Lint/Debugger. (@ilansh)
• #4278: Move all cops dealing with whitespace into a new department called Layout. (@jonas054)
• #4320: Update Rails/OutputSafety to disallow wrapping raw or html_safe with safe_join. (@klesse413)
• #4336: Store rubocop_cache in safer directories. (@jonas054)
• #4361: Use relative path for offense message in Lint/DuplicateMethods. (@pocke)
• #4385: Include .jb file by default. (@pocke)

Bug fixes

• #4265: Require a space before first argument of a method call in Style/SpaceBeforeFirstArg cop. (@cjlarose)
• #4237: Fix false positive in Lint/AmbiguousBlockAssociation cop for lambdas. (@smakagon)
• #4242: Add Capfile to the list of known Ruby filenames. (@bbatsov)
• #4240: Handle ||= in Rails/RelativeDateConstant. (@bbatsov)
• #4241: Prevent Rails/Blank and Rails/Present from breaking when there is no explicit receiver. (@rrosenblum)
• #4249: Handle multiple assignment in Rails/RelativeDateConstant. (@bbatsov)
• #4250: Improve a bit the Ruby code detection config. (@bbatsov)
• #4283: Fix Style/EmptyCaseCondition autocorrect bug - when first when branch includes comma-delimited alternatives. (@ilansh)
• #4268: Handle end-of-line comments when autocorrecting Style/EmptyLinesAroundAccessModifier. (@vergenzt)
• #4275: Prevent Style/MethodCallWithArgsParentheses from blowing up on yield. (@drenmi)
• #3969: Handle multiline method call alignment for arguments to methods. (@jonas054)
• #4304: Allow enabling whole departments when DisabledByDefault is true. (@jonas054)
• #4264: Prevent Rails/SaveBang from blowing up when using the assigned variable in a hash. (@drenmi)
• #4310: Treat paths containing invalid byte sequences as non-matches. (@mclark)
• #4063: Fix Rails/ReversibleMigration misdetection. (@gprado)
• #4339: Fix false positive in Security/Eval cop for multiline string literal. (@pocke)
• #4339: Fix false negative in Security/Eval cop for Binding#eval. (@pocke)
• #4327: Prevent Layout/SpaceInsidePercentLiteralDelimiters from registering offenses on execute-strings. (@drenmi)
• #4371: Prevent Style/MethodName from complaining about unary operator definitions. (@drenmi)
• #4366: Prevent Performance/RedundantMerge from blowing up on double splat arguments. (@drenmi)
• #4352: Fix the auto-correct of Style/AndOr when Enumerable accessors ([]) are used. (@rrosenblum)
• #4393: Prevent Style/InverseMethods from registering an offense for methods that are double negated. (@rrosenblum)
• #4394: Prevent some cops from breaking on safe navigation operator. (@drenmi)
• #4260: Prevent Rails/SkipsModelValidations from registering an offense for FileUtils.touch. (@rrosenblum)