RuboCop 0.30.1

Enjoy all those bug-fixes!

Bugs fixed

• #1691: For assignments with line break after =, use keyword alignment in EndAlignment regardless of configured style. (@jonas054)
• #1769: Fix bug where LiteralInInterpolation registers an offense for interpolation of __LINE__. (@rrosenblum)
• #1773: Fix typo ('strptime' -> 'strftime') in Rails/TimeZone. (@palkan)
• #1777: Fix offense message from Rails/TimeZone. (@mzp)
• #1784: Add an explicit error message when config contains an empty section. (@bankair)
• #1791: Fix autocorrection of PercentLiteralDelimiters with no content. (@cshaffer)
• Fix handling of while and until with assignment in IndentationWidth. (@lumeet)
• #1793: Fix bug in TrailingComma that caused , in comment to count as a trailing comma. (@jonas054)
• #1765: Update 1.9 hash to stop triggering when the symbol is not valid in the 1.9 hash syntax. (@crimsonknave)
• #1806: Require a newer version of parser and use its corrected solution for comment association in Style/Documentation. (@jonas054)
• #1792: Fix bugs in Sample that did not account for array selectors with a range and passing random to shuffle. (@rrosenblum)
• #1770: Add more acceptable methods to Rails/TimeZone (utc, localtime, to_i, iso8601 etc). (@palkan)
• #1795: Fix bug in TrailingBlankLines that caused a crash for files containing only newlines. (@renuo)

RuboCop 0.30.0

Nothing ground-breaking this time around, but the release is pretty exciting non-the-less.
It packs a whole new category of cops (Performance) and a bunch of new Rails cops.
A lot of the existing cops got new customization options and we squashed a ton of bugs.

Thanks to everyone who contributed to this release!

New features

• #1600: Add line_count_based and semantic styles to the BlockDelimiters (formerly Blocks) cop. (@clowder, @mudge)
• #1712: Set Offense#corrected? to true, false, or nil when it was, wasn't, or can't be auto-corrected, respectively. (@vassilevsky)
• #1669: Add command-line switch --display-style-guide. (@marxarelli)
• #1405: Add Rails TimeZone and Date cops. (@palkan)
• #1641: Add ruby19_no_mixed_keys style to HashStyle cop. (@iainbeeston)
• #1604: Add IgnoreClassMethods option to TrivialAccessors cop. (@bbatsov)
• #1651: The Style/SpaceAroundOperators cop now also detects extra spaces around operators. A list of operators that may be surrounded by multiple spaces is configurable. (@bquorning)
• Add auto-correct to Encoding cop. (@rrosenblum)
• #1621: TrailingComma has a new style consistent_comma. (@tamird)
• #1611: Add empty, nil, and both SupportedStyles to EmptyElse cop. Default is both. (@rrosenblum)
• #1611: Add new MissingElse cop. Default is to have this cop be disabled. (@rrosenblum)
• #1602: Add support for # :nodoc in Documentation. (@lumeet)
• #1437: Modify HashSyntax cop to allow the use of hash rockets for hashes that have symbol values when using ruby19 syntax. (@rrosenblum)
• New cop Style/SymbolLiteral makes sure you're not using the string within symbol syntax unless it's needed. (@bbatsov)
• #1657: Autocorrect can be turned off on a specific cop via the configuration. (@jdoconnor)
• New cop Style/AutoResourceCleanup suggests the use of block taking versions of methods that do resource cleanup. (@bbatsov)
• #1275: WhileUntilModifier cop does auto-correction. (@lumeet)
• New cop Performance/ReverseEach to convert reverse.each to reverse_each. (@rrosenblum)
• #1281: IfUnlessModifier cop does auto-correction. (@lumeet)
• New cop Performance/Detect to detect usage of select.first, select.last, find_all.first, and find_all.last and convert them to use detect instead. (@palkan, @rrosenblum)
• #1728: New cop NonLocalExitFromIterator checks for misused return in block. (@ypresto)
• New cop Performance/Size to convert calls to count on Array and Hash to size. (@rrosenblum)
• New cop Performance/Sample to convert usages of shuffle.first, shuffle.last, and shuffle[Fixnum] to sample. (@rrosenblum)
• New cop Performance/FlatMap to convert Enumerable#map...Array#flatten and Enumerable#collect...Array#flatten to Enumerable#flat_map. (@rrosenblum)
• #1144: New cop ClosingParenthesisIndentation checks the indentation of hanging closing parentheses. (@jonas054)
• New Rails cop FindBy identifies usages of where.first and where.take. (@bbatsov)
• New Rails cop FindEach identifies usages of all.each. (@bbatsov)
• #1342: IndentationConsistency is now configurable with the styles normal and rails. (@jonas054)

Bugs fixed

• #1705: Fix crash when reporting offenses of MissingElse cop. (@gerry3)
• #1659: Fix stack overflow with JRuby and Windows 8, during initial config validation. (@pimterry)
• #1694: Ignore methods with a blockarg in TrivialAccessors. (@bbatsov)
• #1617: Always read the html output template using utf-8. (@bbatsov)
• #1684: Ignore symbol keys like :"string" in HashSyntax. (@bbatsov)
• Handle explicit begin blocks in Lint/Void. (@bbatsov)
• Handle symbols in Lint/Void. (@bbatsov)
• #1695: Fix bug with --auto-gen-config and SpaceInsideBlockBraces. (@meganemura)
• Correct issues with whitespace around multi-line lambda arguments. (@zvkemp)
• #1579: Fix handling of similar-looking blocks in BlockAlignment. (@lumeet)
• #1676: Fix auto-correct in Lambda when a new multi-line lambda is used as an argument. (@lumeet)
• #1656: Fix bug that would include hidden directories implicitly. (@jonas054)
• #1728: Fix bug in LiteralInInterpolation and AssignmentInCondition. (@ypresto)
• #1735: Handle trailing space in LineEndConcatenation autocorrect. (@jonas054)
• #1750: Escape offending code lines output by the HTML formatter in case they contain markup. (@jonas054)
• #1541: No inspection of text that follows __END__. (@jonas054)
• Fix comment detection in Style/Documentation. (@lumeet)
• #1637: Fix handling of binding calls in UnusedBlockArgument and UnusedMethodArgument. (@lumeet)

Changes

• #1397: UnneededPercentX renamed to CommandLiteral. The cop can be configured to enforce using either %x or backticks around command literals, or using %x around multi-line commands and backticks around single-line commands. The cop ignores heredoc commands. (@bquorning)
• #1020: Removed the MaxSlashes configuration option for RegexpLiteral. Instead, the cop can be configured to enforce using either %r or slashes around regular expressions, or using %r around multi-line regexes and slashes around single-line regexes. (@bquorning)
• #1734: The default exclusion of hidden directories has been optimized for speed. (@jonas054)
• #1673: Style/TrivialAccessors now requires matching names by default. (@bbatsov)

RuboCop 0.29.1

Bugs fixed

• #1638: Use Parser functionality rather than regular expressions for matching comments in FirstParameterIndentation. (@jonas054)
• #1642: Raise the correct exception if the configuration file is malformed. (@bquorning)
• #1647: Skip SpaceAroundBlockParameters when lambda has no argument. (@eitoball)
• #1649: Handle exception assignments in UselessSetterCall. (@bbatsov)
• #1644: Don't search the entire file system when a folder is named ,. (@bquorning)

RuboCop 0.29.0

New features

• #1430: Add --except option for disabling cops on the command line. (@jonas054)
• #1506: Add auto-correct from EvenOdd cop. (@blainesch)
• #1507: Debugger cop now checks for the Capybara debug methods save_and_open_page and save_and_open_screenshot. (@rrosenblum)
• #1539: Implement autocorrection for Rails/ReadWriteAttribute cop. (@huerlisi)
• #1324: Add AllCops/DisplayCopNames configuration option for showing cop names in reports, like --display-cop-names. (@jonas054)
• #1271: Lambda cop does auto-correction. (@lumeet)
• #1284: Support namespaces, e.g. Lint, in the arguments to --only and --except. (@jonas054)
• #1276: SelfAssignment cop does auto-correction. (@lumeet)
• Add autocorrect to RedundantException. (@mattjmcnaughton)
• #1571: New cop StructInheritance checks for inheritance from Struct.new. (@mmozuras)
• #1575: New cop DuplicateMethods points out duplicate method name in class and module. (@d4rk5eed)
• #1144: New cop FirstParameterIndentation checks the indentation of the first parameter in a method call. (@jonas054)
• #1627: New cop SpaceAroundBlockParameters checks the spacing inside and after block parameters pipes. (@jonas054)

Changes

• #1492: Abort when auto-correct causes an infinite loop. (@dblock)
• Options -e/--emacs and -s/--silent are no longer recognized. Using them will now raise an error. (@bquorning)
• #1565: Let --fail-level A cause exit with error if all offenses are auto-corrected. (@jonas054)
• #1309: Add argument handling to MultilineBlockLayout. (@lumeet)

Bugs fixed

• #1634: Fix PerlBackrefs Cop Autocorrections to Not Raise. (@cshaffer)
• #1553: Fix bug where Style/EmptyLinesAroundAccessModifier interfered with Style/EmptyLinesAroundBlockBody when there is and access modifier at the beginning of a block. (@volkert)
• Handle element assignment in Lint/AssignmentInCondition. (@jonas054)
• #1484: Fix EmptyLinesAroundAccessModifier incorrectly finding a violation inside method calls with names identical to an access modifier. (@dblock)
• Fix bug concerning Exclude properties inherited from a higher directory level. (@jonas054)
• #1500: Fix crashing --auto-correct --only IndentationWidth. (@jonas054)
• #1512: Fix false negative for typical string formatting examples. (@kakutani, @jonas054)
• #1504: Fail with a meaningful error if the configuration file is malformed. (@bquorning)
• Fix bug where auto_correct Rake tasks does not take in the options specified in its parent task. (@rrosenblum)
• #1054: Handle comments within concatenated strings in LineEndConcatenation. (@yujinakayama, @jonas054)
• #1527: Make autocorrect BracesAroundHashParameter leave the correct number of spaces. (@mattjmcnaughton)
• #1547: Don't print [Corrected] when auto-correction was avoided in Style/Semicolon. (@jonas054)
• #1573: Fix assignment-related auto-correction for BlockAlignment. (@lumeet)
• #1587: Exit with exit code 1 if there were errors ("crashing" cops). (@jonas054)
• #1574: Avoid auto-correcting Hash.new to {} when braces would be interpreted as a block. (@jonas054)
• #1591: Don't check parameters inside [] in MultilineOperationIndentation. (@jonas054)
• #1509: Ignore class methods in Rails/Delegate. (@bbatsov)
• #1594: Fix @example warnings in Yard Doc documentation generation. (@mattjmcnaughton)
• #1598: Fix bug in file inclusion when running from another directory. (@jonas054)
• #1580: Don't print [Corrected] when auto-correction was avoided in TrivialAccessors. (@lumeet)
• #1612: Allow expand_path on inherit_from in .rubocop.yml. (@mattjmcnaughton)
• #1610: Check that class method names actually match the name of the containing class/module in Style/ClassMethods. (@bbatsov)

RuboCop 0.28

New features

• New cop ExtraSpacing points out unnecessary spacing in files. (@blainesch)
• New cop EmptyLinesAroundBlockBody provides same functionality as the EmptyLinesAround(Class|Method|Module)Body but for blocks. (@jcarbo)
• New cop Style/EmptyElse checks for empty else-clauses. (@Koronen)
• #1454: New --only-guide-cops and AllCops/StyleGuideCopsOnly options that will only enforce cops that link to a style guide. (@marxarelli)

Changes

• #801: New style context_dependent for Style/BracesAroundHashParameters looks at preceding parameter to determine if braces should be used for final parameter. (@jonas054)
• #1427: Excluding directories on the top level is now done earlier, so that these file trees are not searched, thus saving time when inspecting projects with many excluded files. (@jonas054)
• #1325: When running with --auto-correct, only offenses that can not be corrected will result in a non-zero exit code. (@jonas054)
• #1445: Allow sprockets directive comments (starting with #=) in Style/LeadingCommentSpace. (@bbatsov)

Bugs fixed

• Fix %W[] auto corrected to %w(]. (@toy)
• Fix Style/ElseAlignment Cop to find the right parent on def/rescue/else/ensure/end. (@oneamtu)
• #1181: (fix again) Style/StringLiterals cop stays away from strings inside interpolated expressions. (@jonas054)
• #1441: Correct the logic used by Style/Blocks and other cops to determine if an auto-correction would alter the meaning of the code. (@jonas054)
• #1449: Handle the case in MultilineOperationIndentation where instances of both correct style and unrecognized (plain wrong) style are detected during an --auto-gen-config run. (@jonas054)
• #1456: Fix autocorrect in SymbolProc when there are multiple offenses on the same line. (@jcarbo)
• #1459: Handle parenthesis around the condition in --auto-correct for NegatedWhile. (@jonas054)
• #1465: Fix autocorrect of code like #$1 in PerlBackrefs. (@bbatsov)
• Fix autocorrect of code like #$: in SpecialGlobalVars. (@bbatsov)
• #1466: Allow leading underscore for unused parameters in SingleLineBlockParams. (@jonas054)
• #1470: Handle elsif + else in ElseAlignment. (@jonas054)
• #1474: Multiline string with both << and \ caught by Style/LineEndConcatenation cop. (@katieschilling)
• #1485: Ignore procs in SymbolProc. (@bbatsov)
• #1473: Style/MultilineOperationIndentation doesn't recognize assignment to array/hash element. (@jonas054)

RuboCop 0.27.1

Changes

• #1343: Remove auto-correct from RescueException cop. (@bbatsov)
• #1425: AllCops/Include configuration parameters are only taken from the project .rubocop.yml and files it inherits from, not from .rubocop.yml files in subdirectories. (@jonas054)

Bugs fixed

• #1411: Handle lambda calls without a selector in MultilineOperationIndentation. (@bbatsov)
• #1401: Files in hidden directories, i.e. ones beginning with dot, can now be selected through configuration, but are still not included by default. (@jonas054)
• #1415: String literals concatenated with backslashes are now handled correctly by StringLiteralsInInterpolation. (@jonas054)
• #1416: Fix handling of begin/rescue/else/end in ElseAlignment. (@jonas054)
• #1413: Support empty elsif branches in MultilineIfThen. (@janraasch, @jonas054)
• #1406: Allow a newline in SpaceInsideRangeLiteral. (@bbatsov)

RuboCop 0.27.0

New features

• #1348: New cop ElseAlignment checks alignment of else and elsif keywords. (@jonas054)
• #1321: New cop MultilineOperationIndentation checks indentation/alignment of binary operations if they span more than one line. (@jonas054)
• #1077: New cop Metrics/AbcSize checks the ABC metric, based on assignments, branches, and conditions. (@jonas054, @jfelchner)
• #1352: WordArray is now configurable with the WordRegex option. (@bquorning)
• #1181: New cop Style/StringLiteralsInInterpolation checks quotes inside interpolated expressions in strings. (@jonas054)
• #872: Style/IndentationWidth is now configurable with the Width option. (@jonas054)
• #1396: Include .opal files by default. (@bbatsov)
• #771: Three new Style cops, EmptyLinesAroundMethodBody , EmptyLinesAroundClassBody , and EmptyLinesAroundModuleBody replace the EmptyLinesAroundBody cop. (@jonas054)

Changes

• #1084: Disabled Style/CollectionMethods by default. (@bbatsov)

Bugs fixed

• AlignHash no longer skips multiline hashes that contain some elements on the same line. (@mvz)
• #1349: BracesAroundHashParameters no longer cleans up whitespace in autocorrect, as these extra corrections are likely to interfere with other cops' corrections. (@jonas054)
• #1350: Guard against Blocks cop introducing syntax errors in auto-correct. (@jonas054)
• #1374: To eliminate interference, auto-correction is now done by one cop at a time, with saving and re-parsing inbetween. (@jonas054)
• #1388: Fix a false positive in FormatString. (@bbatsov)
• #1389: Make --out to create parent directories. (@yous)
• Refine HTML formatter. (@yujinakayama)
• #1410: Handle specially Java primitive type references in ColonMethodCall. (@bbatsov)

RuboCop 0.26.1

RuboCop 0.26.1 is a bugfix-only release. Below is a list of the bugs we've fixed since 0.26.0:

Bugs fixed

• #1326: Fix problem in SpaceInsideParens with detecting space inside parentheses used for grouping expressions. (@jonas054)
• #1335: Restrict URI schemes permitted by LineLength when AllowURI is enabled. (@smangelsdorf)
• #1339: Handle eql? and equal? in OpMethod. (@bbatsov)
• #1340: Fix crash in Style/SymbolProc cop when the block calls a method with no explicit receiver. (@smangelsdorf)

RuboCop 0.26.0

Nothing particularly exciting this time around. The new release comes
with lots of bug fixes, more auto-corrections and several new cops.

Note that the Style/Encoding cop is now disabled by default. See
#1304 for the rationale behind this change.

Below is the list of all the gory details. Enjoy!

New features

• New formatter HTMLFormatter generates a html file with a list of files with offences in them. (@SkuliOskarsson)
• New cop SpaceInsideRangeLiteral checks for spaces around .. and ... in range literals. (@bbatsov)
• New cop InfiniteLoop checks for places where Kernel#loop should have been used. (@bbatsov)
• New cop SymbolProc checks for places where a symbol can be used as proc instead of a block. (@bbatsov)
• UselessAssignment cop now suggests a variable name for possible typos if there's a variable-ish identifier similar to the unused variable name in the same scope. (@yujinakayama)
• PredicateName cop now has separate configurations for prefices that denote predicate method names and predicate prefices that should be removed. (@bbatsov)
• #1272: Tab cop does auto-correction. (@yous)
• #1274: MultilineIfThen cop does auto-correction. (@bbatsov)
• #1279: DotPosition cop does auto-correction. (@yous)
• #1277: SpaceBeforeFirstArg cop does auto-correction. (@yous)
• #1310: Handle module_function in Style/AccessModifierIndentation and Style/EmptyLinesAroundAccessModifier. (@bbatsov)

Changes

• #1289: Use utf-8 as default encoding for inspected files. (@jonas054)
• #1304: Style/Encoding is no longer a no-op on Ruby 2.x. It's also disabled by default, as projects not supporting 1.9 don't need to run it. (@bbatsov)

Bugs fixed

• #1263: Do not report %W literals with special escaped characters in UnneededCapitalW. (@jonas054)
• #1286: Fix a false positive in VariableName. (@bbatsov)
• #1211: Fix false negative in UselessAssignment when there's a reference for the variable in an exclusive branch. (@yujinakayama)
• #1307: Fix auto-correction of RedundantBegin cop deletes new line. (@yous)
• #1283: Fix auto-correction of indented expressions in PercentLiteralDelimiters. (@jonas054)
• #1315: BracesAroundHashParameters auto-correction removes whitespace around content inside braces. (@jspanjers)
• #1313: Fix a false positive in AndOr when enforced style is conditionals. (@bbatsov)
• Handle post-conditional while and until in AndOr when enforced style is conditionals. (@yujinakayama)
• #1319: Fix a false positive in FormatString. (@bbatsov)
• #1287: Allow missing blank line for EmptyLinesAroundAccessModifier if next line closes a block. (@sch1zo)

RuboCop 0.25.0

This release comes with lots of bug fixes and several new cops (that will likely need bugfixes in the next release :-)).

The most notable change in 0.25 is the addition of the Metrics namespace. Several Style cops have been moved there
(e.g. ClassLength, MethodLength, etc).

This release also marks the end of us supporting Ruby 1.9.2 - now Ruby 1.9.3+ is required.

Below is the list of all the gory details. Enjoy!

New features

• #1259: Allow AndOr cop to autocorrect by adding method call parenthesis. (@vrthra)
• #1232: Add EnforcedStyle option to cop AndOr to restrict it to conditionals. (@vrthra)
• #835: New cop PercentQLiterals checks if use of %Q and %q matches configuration. (@jonas054)
• #835: New cop BarePercentLiterals checks if usage of %() or %Q() matches configuration. (@jonas054)
• #1079: New cop MultilineBlockLayout checks if a multiline block has an extpression on the same line as the start of the block. (@barunio)
• #1217: Style::EmptyLinesAroundAccessModifier cop does auto-correction. (@tamird)
• #1220: New cop PerceivedComplexity is similar to CyclomaticComplexity, but reports when methods have a high complexity for a human reader. (@jonas054)
• Debugger cop now checks for binding.pry_remote. (@yous)
• #1238: Add MinBodyLength option to Next cop. (@bbatsov)
• #1241: TrailingComma cop does auto-correction. (@yous)
• #1078: New cop BlockEndNewline checks if the end statement of a multiline block is on its own line. (@barunio)
• #1078: BlockAlignment cop does auto-correction. (@barunio)

Changes

• #1220: New namespace Metrics created and some Style cops moved there. (@jonas054)
• Drop support for Ruby 1.9.2 in accordance with the end of the security maintenance extension. (@yujinakayama)

Bugs fixed

• #1251: Fix PercentLiteralDelimiters auto-correct indentation error. (@hannestyden)
• #1197: Fix false positive for new lambda syntax in SpaceInsideBlockBraces. (@jonas054)
• #1201: Fix error at anonymous keyword splat arguments in some variable cops. (@yujinakayama)
• Fix false positive in UnneededPercentQ for /%Q(something)/. (@jonas054)
• Fix SpacesInsideBrackets for Hash#[] calls with spaces after left bracket. (@mcls)
• #1210: Fix false positive in UnneededPercentQ for %Q(\t"). (@jonas054)
• Fix false positive in UnneededPercentQ for heredoc strings with %q/%Q. (@jonas054)
• #1214: Don't destroy code in AlignHash autocorrect. (@jonas054)
• #1219: Don't report bad alignment for end or } in BlockAlignment if it doesn't begin its line. (@jonas054)
• #1227: Don't permanently change yamler as it can affect other apps. (@jonas054)
• #1184: Fix a false positive in Output cop. (@bbatsov)
• #1256: Ignore block-pass in TrailingComma. (@tamird)
• #1255: Compare without context in AutocorrectUnlessChangingAST. (@jonas054)
• #1262: Handle regexp and backtick literals in VariableInterpolation. (@bbatsov)