Master

Breaking

SwiftLint now requires Swift 5.0 or higher to build.
JP Simard

Experimental

None.

Enhancements

Add contains_over_range_nil_comparison opt-in rule to prefer using contains over comparison of range(of:) to nil.
Colton Schlosser #2776
Make contains_over_first_not_nil rule also match first(where:) == nil.
Colton Schlosser
Add two new cases to the Mark rule to detect a Mark using three slashes.
nvanfleet #2866
Add flatmap_over_map_reduce opt-in rule to prefer using flatMap over map { ... }.reduce([], +).
Marcelo Fabri #2883

Bug Fixes

None.

0.35.0: Secondary Lint Trap

This is the last release to support building with Swift 4.2.x.

Breaking

None.

Experimental

None.

Enhancements

Type name rules considers SwiftUI template code.
atfelix #2791
Add no_space_in_method_call rule to validate that there're no spaces between the method name and parentheses in a method call.
Marcelo Fabri
Add contains_over_filter_count opt-in rule to warn against using expressions like filter(where:).count > 0 instead of contains(where:).
Marcelo Fabri #2803
Add contains_over_filter_is_empty opt-in rule to warn against using expressions like filter(where:).isEmpty instead of contains(where:).
Marcelo Fabri
Add empty_collection_literal opt-in rule to prefer using isEmpty to comparison to [] or [:].
Colton Schlosser #2807

Bug Fixes

Fixed false positive in colon rule inside guard and ternary operator.
Andrey Uryadov #2806
Release memory created for sourcekitd requests.
Colton Schlosser #2812
Fix swiftlint rules output table formatting.
JP Simard #2787
Don't trigger missing_docs violations when implementing deinit.
Marcelo Fabri #2690
Fix unused_import rule false positive when only operators from the module are used.
Timofey Solonin #2737
Avoid triggering redundant_type_annotation rule when declaring IBInspectable properties.
Marcelo Fabri #2842
Don't trigger missing_docs violations on extensions.
Marcelo Fabri #2851

0.34.0: Anti-Static Wool Dryer Balls

Breaking

To enable collecting rules, many breaking changes to SwiftLintFramework's public API were made the Linter type was significantely changed, and a new CollectedLinter type was introduced. Many public SwiftLintFramework APIs that interacted with Linter have also been affected. More new types and protocols were added such as RuleStorage, AnyCollectingRule, CollectingRule, CollectingCorrectableRule. We are not aware of any significant users of the SwiftLintFramework library, so if you are affected by this, please reach out to SwiftLint contributors by filing a GitHub issue about your use case.
Elliott Williams JP Simard

Experimental

Add a two-stage CollectingRule protocol to support rules that collect data from all files before validating. Collecting rules implement a collect method which is called once for every file, before any file is checked for violations. By collecting, rules can be written which validate across multiple files for things like unused declarations.
Elliott Williams #2431
Add a new unused_declaration analyzer rule to lint for unused declarations. By default, detects unused fileprivate, private and internal declarations. Configure the rule with include_public_and_open: true to also detect unused public and open declarations.
JP Simard
Completely remove the unused_private_declaration rule. Please use unused_declaration instead.
JP Simard

Enhancements

None.

Bug Fixes

None.

0.33.1: Coin-Operated Property Wrapper

Breaking

None.

Experimental

None.

Enhancements

Significantly improve performance when running with a large number of cached configurations or when running with many cached results. This was done by splitting each configuration to have its own cache and by encoding the cache as a binary property list instead of json.
Colton Schlosser JP Simard
Several public types in SwiftLintFramework have added Codable conformance: Location, RuleDescription, RuleKind, StyleViolation, SwiftVersion, ViolationSeverity.
JP Simard
Print full relative path to file in log output when it matches the file name of another path being linted.
Keith Smiley

Bug Fixes

Don't trigger vertical_parameter_alignment violations when using parameters with attributes such as @ViewBuilder in function declarations.
Marcelo Fabri #2792
Fix false positive in function_default_parameter_at_end rule when using a closure parameter with default value.
Marcelo Fabri #2788

0.33.0: Worldwide Dryers Conference

Breaking

Remove the weak_computed_property rule. Please see linked issue for discussion and rationale.
JP Simard #2712

Experimental

None.

Enhancements

Add " - " delimiter to allow commenting SwiftLint commands without triggering superfluous_disable_command.
Kevin Randrup
Make testSimulateHomebrewTest() test opt-in because it may fail on unknown condition. Set SWIFTLINT_FRAMEWORK_TEST_ENABLE_SIMULATE_HOMEBREW_TEST environment variable to test like:
```
$ SWIFTLINT_FRAMEWORK_TEST_ENABLE_SIMULATE_HOMEBREW_TEST=1 \
swift test --filter testSimulateHomebrewTest
```
Norio Nomura
Add option to configure how nested types should be separated in file names by introducting nested_type_separator configuration for the file_name rule.
Frederick Pietschmann #2717
Add unowned_variable_capture opt-in rule to warn against unowned captures in closures when using Swift 5.
Marcelo Fabri #2097
Don't trigger a no_fallthrough_only violation if next case is an @unknown default.
Marcelo Fabri #2696
Add duplicate_enum_cases rule to validate that an enum doesn't contain duplicated cases, as it's impossible to switch on it (see SR-10077 for details).
Marcelo Fabri #2676
Add legacy_multiple opt-in rule to warn against using the remainder operator (%) checking for a remainder of zero when using Swift 5.
Marcelo Fabri #2612

Bug Fixes

Don't trigger redundant_void_return violations when using subscript as the return type is required.
Marcelo Fabri
Skip module import if cursor info is missing module info.
alvarhansen #2746
Don't trigger file_types_order violations in files only containing extensions.
Sam Rayner #2749
Force-unwrapping self should trigger a violation of the force_unwrapping rule.
Dalton Claybrook #2759

0.32.0: Wash-N-Fold-N-Reduce

Breaking

None.

Experimental

None.

Enhancements

Add reduce_boolean rule to prefer simpler constructs over reduce(Boolean).
Xavier Lowmiller #2675
Add nsobject_prefer_isequal rule to warn against implementing == on an NSObject subclass as calling isEqual (i.e. when using the class from Objective-C) will not use the defined == method.
Matthew Healy #2663
Add reduce_into opt-in rule to encourage the use of reduce(into:_:) instead of reduce(_:_:) which is less performant.
Dalton Claybrook #2658
Remove @ mark to fix invalid link in Rules.md.
Hiroki Nagasawa #2669
Add new opt-in rule file_types_order to specify how the types in a file should be sorted.
Cihat Gündüz #2294
Add new opt-in rule type_contents_order to specify the order of subtypes, properties, methods & more within a type.
Cihat Gündüz #2294
Add nslocalizedstring_require_bundle rule to ensure calls to NSLocalizedString specify the bundle where the strings file is located.
Matthew Healy #2595
contains_over_first_not_nil rule now also checks for firstIndex(where:).
Marcelo Fabri #2678
Add unused_capture_list rule to ensure that all references in a closure capture list are used.
Dalton Claybrook #2715
SwiftLint can now be compiled using Xcode 10.2.
Marcelo Fabri Norio Nomura #2693

Bug Fixes

Fix bug where SwiftLint ignores excluded files list in a nested configuration file.
Dylan Bruschi #2447
colon rule now catches violations when declaring generic types with inheritance or protocol conformance.
Marcelo Fabri #2628
discarded_notification_center_observer rule now checks if the observer is added to any collection or passed to a function before triggering the violation.
jsloop42 #2684
Fix false positives on number_separator when the number is wrapped in parentheses.
Dalton Claybrook #2683
Fix false positives on sorted_first_last when calling firstIndex and lastIndex method. Taiki Komaba #2700
Fix crash when running on Linux with Swift 5 without specifying a --path value or specifying an empty string.
Keith Smiley #2703
Fix false positives on explicit_acl and explicit_top_level_acl rules when declaring extensions that add protocol conformances with Swift 5.
Marcelo Fabri #2705
Let disable all command override superfluous_disable_command rule.
Frederick Pietschmann #2670
Fix issues in explict_acl, redundant_set_access_control and explicit_top_level_acl rules when using Swift 5.
Marcelo Fabri #2694

0.31.0: Busy Laundromat

Breaking

None.

Experimental

None.

Enhancements

Add deployment_target rule to validate that @availability attributes and #available conditions are not using a version that is satisfied by the deployment target. Since SwiftLint can't read an Xcode project, you need to configure this rule with these keys: iOS_deployment_target, macOS_deployment_target, watchOS_deployment_target and tvOS_deployment_target. By default, these values are configured with the minimum versions supported by Swift.
Marcelo Fabri #2589
Add weak_computed_property rule to warn against using weak in a computed property as it has no effect.
Marcelo Fabri #2596
Add SwiftVersion.five and automatically detect it when computing SwiftVersion.current.
JP Simard
Make redundant_objc_attribute rule autocorrectable.
Daniel Metzing
Add required_deinit opt-in rule to ensure that all classes have a deinit method. The purpose of this is to make memory leak debugging easier so all classes have a place to set a breakpoint to track deallocation.
Ben Staveley-Taylor #2620
nimble_operator now warns about beTrue() and beFalse().
Igor-Palaguta #2613
Warn if a configured rule is not enabled.
Marcelo Fabri #1350
Add exclude_ranges option to number_separator for exclusion.
Cihat Gündüz #2637

Bug Fixes

Fix false positives on no_grouping_extension rule when using where clause.
Almaz Ibragimov
Fix explicit_type_interface when used in statements.
Daniel Metzing #2154
Fix lower_acl_than_parent when linting with Swift 5.
JP Simard #2607
Fix let_var_whitespace with #warning.
Igor-Palaguta #2544
Fix excessive superfluous_disable_command violations being reported when using an invalid rule identifier in a disable command.
Marcelo Fabri #2623
Fix explicit_type_interface with allow_redundancy when assigning type references to variables.
Cihat Gündüz #2636
Fix unused_closure_parameter when argument is named self.
Cihat Gündüz #2437
Fix first_where for some calls on Realm collection types.
Cihat Gündüz #1930

0.30.1: Localized Stain Remover

Breaking

None.

Experimental

Silence CodingKeys violations in unused_private_declaration since these should always be intentional violations.
Kim de Vos #2573

Enhancements

Add nslocalizedstring_key opt-in rule to validate that keys used in NSLocalizedString calls are static strings, so genstrings will be able to find them.
Marcelo Fabri

Bug Fixes

Fix false positives on trailing_closure rule when using anonymous closure calls.
Marcelo Fabri #2159
Fix false positives on array_init rule when using prefix operators.
Marcelo Fabri #1877
Exclude files defined in the excluded value of SwiftLint's configuration when --use-script-input-files and --force-exclude are specified.
Luis Valdés #591

0.30.0: A New Washer and Dryer Set

Breaking

None.

Experimental

None.

Enhancements

Add duplicate_imports rule to prevent importing the same module twice.
Samuel Susla #1881
Add unused_setter_value rule to validate that setter arguments are used in properties.
Marcelo Fabri #1136
Add only_single_muted_parameter configuration on trailing_closure rule to only enforce using trailing closure on functions that take one single muted parameter.
Marcelo Fabri

Bug Fixes

Fix false positives on identical_operands rule when the right side of the operand has a chained optional.
JP Simard #2564

0.29.4: In-Unit Operands

Breaking

None.

Experimental

Fix unused_import correction deleting unrelated ranges when there are multiple violations in a single file.
JP Simard #2561

Enhancements

Add strong_iboutlet opt-in rule to enforce that @IBOutlets are not declared as weak.
Marcelo Fabri #2433

Bug Fixes

Fix inaccessible custom rules in nested configurations.
Timofey Solonin #1815 #2441
Improve superfluous_disable_command to warn against disabling non-existent rules.
Kim de Vos #2348
Fix false positives on identical_operands rule when the right side of the operand does not terminate.
Xavier Lowmiller #2467

0.29.3: Entangled Agitator

Breaking

None.

Experimental

Skip @IBInspectable and deinit declarations in unused_private_declaration.
JP Simard

Enhancements

Allow configuring discouraged_object_literal rule to only discourage one kind of object literal.
Marcelo Fabri #2439
Adds xct_specific_matcher opt-in rule to enforce specific matchers over XCTAssertEqual and XCTAssertNotEqual.
Ornithologist Coder #1874
Add last_where opt-in rule that warns against using .filter { /* ... */ }.last in collections, as .last(where: { /* ... */ }) is more efficient.
Marcelo Fabri
Add unused_control_flow_label rule to validate that control flow labels are used.
Marcelo Fabri #2227

Bug Fixes

Fix false positives on first_where rule when calling filter without a closure parameter (for example on a Realm collection).
Marcelo Fabri
Fix false positives on sorted_first_last rule when calling sorted with a different argument than by: (e.g. on a Realm collection).
Marcelo Fabri #2533
Fix false positives on redundant_objc_attribute rule when using nested types.
Marcelo Fabri #2539
Fix false positives on vertical_whitespace_between_cases rule when a blank line is present but it contains trailing whitespace.
Ben Staveley-Taylor #2538

0.29.2: Washateria

Breaking

None.

Experimental

None.

Enhancements

Add new opt-in rule vertical_whitespace_opening_braces to warn against empty lines after opening braces.
Cihat Gündüz #1518
Add new opt-in rule vertical_whitespace_closing_braces to warn against empty lines before closing braces.
Cihat Gündüz #1518
Improve performance for unused_private_declaration and unused_import rules for large files.
Niil Öhlin
Add new legacy_hashing rule to encourage the use of Swift 4.2's new hashing interface.
Kim de Vos #2108
Improve private_unit_test rule to allow private classes with @objc attribute.
Kim de Vos #2282
Support glob patterns without the star.
Maksym Grebenets
Make modifier_order rule autocorrectable.
Timofey Solonin #2353

Bug Fixes

Fix false positives in redundant_objc_attribute for private declarations under @objcMembers.
Daniel Metzing #2499
Fix an error when pulling SwiftLint as a dependency using Carthage.
JP Simard
Non-string values specified in swiftlint_version now fail the lint if it doesn't match the version.
JP Simard #2518

0.29.1: There’s Always More Laundry

Breaking

None.

Experimental

None.

Enhancements

Add redundant_objc_attribute to warn against already implied @objc attribute.
Daniel Metzing #2193
Add vertical_whitespace_between_cases opt-in rule to enforce a single empty line between switch cases.
Cihat Gündüz #1517
Add multiline_arguments_brackets opt-in rule to warn against multiline function call arguments with surrounding brackets without newline.
Cihat Gündüz #2306
Add multiline_literal_brackets opt-in rule to warn against multiline literal arrays & dictionaries with surrounding brackets without newline.
Cihat Gündüz #2306
Add multiline_parameters_brackets opt-in rule to warn against multiline function definition parameters with surrounding brackets without newline.
Cihat Gündüz #2306
Ignore unspecified modifiers in modifier_order.
Timofey Solonin #2435
The lint command now exits with a code of 2 when not using pinned version defined as swiftlint_version in the configuration file.
Kim de Vos #2074

Bug Fixes

Fix false positive in nimble_operator rule.
Marcelo Fabri #2489
Fix false positives on explicit_type_interface rule when configured with option allowRedundancy set to true.
Cihat Gündüz #2425
Only mark custom rules as 'enabled in your config' in the output of the rules command when there are one or more configured custom rules.
jhildensperger
Fix wrong correction when removing testable imports with the unused_import rule.
JP Simard
Fix false positive with the unused_import rule when importing Foundation when there are attributes in that file requiring Foundation.
JP Simard

0.29.0: A Laundry List of Changes

Breaking

SwiftLint now requires Swift 4.2 or higher to build.
JP Simard

Experimental

None.

Enhancements

Improve the performance of saving or reading cached lint results on platforms with CommonCrypto.
JP Simard
Add markdown reporter which outputs markdown-formatted tables, ideal for rendering in GitLab or GitHub.
Dani Vela
Add testSimulateHomebrewTest() to IntegrationTests that simulates test in homebrew-core/Formula/swiftlint.rb within sandbox.
Norio Nomura

Bug Fixes

Fix compiler warnings when building with Swift 4.2 introduced in the last release.
JP Simard
Fix false positive in explicit_init rule.
Dominic Freeston
Fix toggle_bool false positive violation when comparing object parameter to an equally named variable.
Timofey Solonin #2471
Fix false positive on file_name rule with specific patterns.
Cihat Gündüz #2417
Fix crash in no_fallthrough_only and potentially other rules when linting files with unicode characters in certain locations.
JP Simard #2276
Fix violations with no character/column location not being reported in xcpretty. Now violations with no column location default to a column value of 1 indicating the start of the line.
JP Simard #2267

0.28.2: EnviroBoost Plus

Breaking

None.

Experimental

None.

Enhancements

Add SWIFTLINT_DISABLE_SOURCEKIT environment variable to allow running SwiftLint without connecting to SourceKit. This will run a subset of rules that don't require SourceKit, which is useful when running in a sandboxed setting such as in Homebrew's CI.
Norio Nomura

Bug Fixes

None.

0.28.1: EnviroBoost

This is the last release to support building with Swift 4.0 and Swift 4.1.

Breaking

None.

Experimental

None.

Enhancements

None.

Bug Fixes

Improve the performance of collecting which files to lint by up to 3.5x.
JP Simard
Improve the performance of looking up cached lint results by up to 10x for complex configurations.
JP Simard

0.28.0: EcoBoost

Breaking

Completely remove the --use-tabs option of the autocorrect command that was deprecated in 0.24.1. In its place, define an indentation key in your configuration files.
JP Simard

Experimental

Add a new swiftlint analyze command which can lint Swift files using the full type-checked AST. Rules of the AnalyzerRule type will be added over time. The compiler log path containing the clean swiftc build command invocation (incremental builds will fail) must be passed to analyze via the --compiler-log-path flag. e.g. --compiler-log-path /path/to/xcodebuild.log
JP Simard
Add an explicit_self analyzer rule to enforce the use of explicit references to self. when accessing instance variables or functions.
JP Simard #321
Add an unused_import analyzer rule to lint for unnecessary imports.
JP Simard #2248
Add an unused_private_declaration analyzer rule to lint for unused private declarations.
JP Simard

Enhancements

Add legacy_random opt-in rule to encourage the use of .random(in:) instead of arc4random, arc4random_uniform, and drand48.
Joshua Kaplan
Improve performance of line_length and multiple_closures_with_trailing_closure rules.
Marcelo Fabri
Add closure_body_length opt-in rule to enforce the maximum number of lines a closure should have. Requires Swift 4.2.
Ornithologist Coder #52
Add SonarQube reporter.
Yusuke Ohashi #2350
Add prohibited_interface_builder opt-in rule to validate that @IBOutlets and @IBActions are not used.
Marcelo Fabri #2365
Add inert_defer rule to validate that defer is not used at the end of a scope.
Marcelo Fabri #2123
Add toggle_bool opt-in rule which suggests using someBool.toggle() over someBool = !someBool. Requires Swift 4.2.
Dalton Claybrook #2369
Add identical_operands opt-in rule to validate that operands are different expressions in comparisons.
Marcelo Fabri #1371
Add collection_alignment opt-in rule to validate that all elements in a collection literal are aligned vertically.
Dalton Claybrook #2326
Add static_operator opt-in rule to enforce that operators are declared as static functions instead of free functions.
Marcelo Fabri #2395
Specify what type of compiler protocol initializer violated the compiler_protocol_init rule.
Timofey Solonin #2422

Bug Fixes

Fix comma rule false positives on object literals (for example, images).
Marcelo Fabri #2345
Fix false positive on file_name rule when using nested types.
Marcelo Fabri #2325
Fix crash on multiline_function_chains rule when using some special characters inside the function calls.
Marcelo Fabri #2360
Change autocorrect --format to run format before autocorrect, fixing conflicts between default indentation and rules which modify indentation (i.e. closure_end_indentation).
Ornithologist Coder #2374
Fix false positive on empty_count rule when assessing binary, octal and hexadecimal integer literals.
Timofey Solonin #2423

0.27.0: Heavy Duty

Breaking

None.

Enhancements

Append modifier_order description with failure reason.
Daniel Metzing #2269
Decrease default severity of superfluous_disable_command to warning.
Frederick Pietschmann #2250
Don't touch files when running autocorrect --format if the contents haven't changed.
Marcelo Fabri #2249
Add only_enforce_after_first_closure_on_first_line configuration to multiline_arguments
Mike Ciesielka #1896
Add anyobject_protocol opt-in rule which suggests using AnyObject over class for class-only protocols.
Ornithologist Coder #2283
Add options prefix_pattern and suffix_pattern to rule file_name.
Cihat Gündüz #2309
Add new bool config option if_only to rule conditional_returns_on_newline to specify that the rule should only be applied to if statements.
Cihat Gündüz #2307
Add support for globs in excluded file paths.
Keith Smiley #2316
Add only_private configuration to prefixed_toplevel_constant rule.
Keith Smiley #2315
Make rule explicit_type_interface compatible with rule redundant_type_annotation via new option allow_redundancy.
Cihat Gündüz #2312
Add missing_docs rule to warn against undocumented declarations.
Nef10 Andrés Cecilia Luque #1652

Bug Fixes

Fix an issue with control_statement where commas in clauses prevented the rule from applying.
Allen Wu
Fix explicit_enum_raw_value, generic_type_name, implicit_return, required_enum_case, quick_discouraged_call, array_init, closure_parameter_position and unused_closure_parameter rules when linting with Swift 4.2.
Marcelo Fabri
Fix identifier_name rule false positives with enum when linting using Swift 4.2.
Marcelo Fabri Jacob Greenfield #2231
Fix a crash when running with Swift 4.2.
Norio Nomura SR-7954
Fix false positive on attributes rule when linting a line that is below a line with a declaration that has attributes.
Marcelo Fabri #2297
redundant_optional_initialization rule now lints local variables.
Marcelo Fabri #2233
Fix autocorrection for redundant_type_annotation rule.
Marcelo Fabri #2314

0.26.0: Maytagged Pointers

Breaking

SwiftLint now requires Swift 4.0 or higher to build.
JP Simard
The fallthrough rule is now opt-in.
Marcelo Fabri #1892

Enhancements

Add optional filename verification to the file_header rule. All occurrences in the pattern of the SWIFTLINT_CURRENT_FILENAME placeholder are replaced by the name of the validated file.
Anders Hasselqvist #1079
Updates the untyped_error_in_catch rule to support autocorrection.
Daniel Metzing
Add no_fallthrough_only rule to check that case statements do not contain only a fallthrough.
Austin Belknap
Add indented_cases support to switch_case_alignment rule.
Shai Mishali #2119
Add opt-in modifier_order to enforce the order of declaration modifiers. Requires Swift 4.1 or later.
Jose Cheyo Jimenez Daniel Metzing #1472 #1585
Validate implicit subscript getter in implicit_getter rule when using Swift 4.1 or later.
Marcelo Fabri #898
Add unavailable_function opt-in rule to validate that functions that are currently unimplemented (using a placeholder fatalError) are marked with @available(*, unavailable).
Marcelo Fabri #2127
Updates the closure_end_indentation rule to support autocorrection.
Eric Horacek
Updates the literal_expression_end_indentation rule to support autocorrection.
Eric Horacek
Add a new multiline_function_chains rule to validate that chained function calls start either on the same line or one per line.
Eric Horacek #2214
Improves the mark rule's autocorrection.
Eric Horacek
Add redundant_set_access_control rule to warn against using redundant setter ACLs on variable declarations.
Marcelo Fabri #1869
Add a new ignores_interpolated_strings config parameter to the line_length rule to ignore lines that include interpolated strings from this rule.
Michael Gray #2100
Add a new ignores_default_parameters config parameter to the function_parameter_count rule to ignore default parameter when calculating parameter count. True by default.
Varun P M #2171
Add empty_xctest_method opt-in rule which warns against empty XCTest methods.
Ornithologist Coder #2190
Add function_default_parameter_at_end opt-in rule to validate that parameters with defaults are located toward the end of the parameter list in a function declaration.
Marcelo Fabri #2176
Add file_name opt-in rule validating that file names contain the name of a type or extension declared in the file (if any).
JP Simard #1420
Add redundant_type_annotation opt-in rule which warns against unnecessary type annotations for variables.
Šimon Javora #2239
Add convenience_type opt-in rule to validate that types hosting only static members should be enums to avoid instantiation.
Marcelo Fabri #1871
Support for passing multiple path arguments.
Ben Asher #810

Bug Fixes

Update LowerACLThanParent rule to not lint extensions.
Keith Smiley #2164
Fix operator usage spacing nested generics false positive.
Eric Horacek #1341 #1897
Fix autocorrection for several rules (empty_parentheses_with_trailing_closure, explicit_init, joined_default_parameter, redundant_optional_initialization and unused_closure_parameter ) when used with preprocessor macros.
John Szumski Marcelo Fabri
Fix unneeded_parentheses_in_closure_argument false negatives when multiple violations are nested.
Marcelo Fabri #2188
Fix false negatives in implicit_return rule when using closures as function arguments.
Marcelo Fabri #2187
Fix false positives in attributes rule when @testable is used.
Marcelo Fabri #2211
Fix false positives in prohibited_super_call rule.
Marcelo Fabri #2212
Fix a false positive in unused_closure_parameter rule when a parameter is used in a string interpolation.
Marcelo Fabri #2062
Fixes a case where the closure_end_indentation rule wouldn't lint the end indentation of non-trailing closure parameters.
Eric Horacek #2121

0.25.1: Lid Locked

This is the last release to support building with Swift 3.2 and Swift 3.3. The next release will require Swift 4.0 or higher to build.

Breaking

None.

Enhancements

Add LowerACLThanParent rule.
Keith Smiley #2136
Add UIOffsetMake to legacy_constructor rule.
Nealon Young #2126
Add a new excluded config parameter to the explicit_type_interface rule to exempt certain types of variables from the rule.
Rounak Jain #2028
Add empty_string opt-in rule to validate against comparing strings to "" instead of using .isEmpty.
Davide Sibilio
Add untyped_error_in_catch opt-in rule to warn against declaring errors without an explicit type in catch statements instead of using the implicit error variable.
Daniel Metzing #2045
Add all keyword for use in disable / enable statement: // swiftlint:disable all. It allows disabling SwiftLint entirely, in-code, for a particular section.
fredpi #2071
Adds --force-exclude option to lint and autocorrect commands, which will force SwiftLint to exclude files specified in the config excluded even if they are explicitly specified with --path.
Ash Furrow #2051
Adds discouraged_optional_collection opt-in rule to encourage the use of empty collections instead of optional collections.
Ornithologist Coder #1885
Add 4.1.0, 4.1.1 and 4.2.0 to Swift version detection.
Norio Nomura #2143
Support building with Swift 4.1.
Norio Nomura #2038

Bug Fixes

Fixes an issue with the yoda_condition rule where the severity would always display as a warning, and the reason would display as the severity type.
Twig
Fix TODOs lint message to state that TODOs should be resolved instead of avoided.
Adonis Peralta #150
Fix some cases where colon rule wouldn't autocorrect dictionary literals.
Marcelo Fabri #2050
Fix linux crash on sources with surrogate pair emojis as variable names.
Cyril Lashkevich
Make legacy_constructor rule more reliable, especially for autocorrecting.
Marcelo Fabri #2098
Fix colon rule autocorrect when preprocessor macros are present.
Marcelo Fabri #2099
Fix crash when saving cache if there're entries referring to the same path but with different capitalization.
Marcelo Fabri #2032
Fix several rules (empty_enum_arguments, explicit_init empty_parentheses_with_trailing_closure, joined_default_parameter, redundant_optional_initialization, redundant_void_return and unused_closure_parameter) rules autocorrection inside functions or other declarations.
Marcelo Fabri
Fix redundant_void_return rule autocorrect when preprocessor macros are present.
John Szumski #2115
Fix issue where the autocorrect done message used the plural form of "files" even if only 1 file changed.
John Szumski
Fix false positives in attributes rule when using Swift 4.1.
Marcelo Fabri #2125 #2141

0.25.0: Cleaning the Lint Filter

Breaking

None.

Enhancements

Adds discouraged_optional_boolean opt-in rule to discourage the use of optional booleans.
Ornithologist Coder #2011

Bug Fixes

Fix some cases where colon rule wouldn't be autocorrected.
Manabu Nakazawa
Fix false positives in explicit_acl rule when declaring functions and properties in protocols or implementing deinit.
Marcelo Fabri #2014
Fix false negatives in unneeded_parentheses_in_closure_argument rule when using _ as one of the closure arguments.
Marcelo Fabri #2017
Fix several rules that use attributes when linting with a Swift 4.1 toolchain.
Marcelo Fabri #2019
Don't trigger violations in let_var_whitespace rule when using local variables when linting with a Swift 4.1 toolchain.
Marcelo Fabri #2021
Improve type_name rule violations to be positioned on the type name.
Marcelo Fabri #2021
Use SourceKit to validate associatedtype and typealias in type_name rule when linting with Swift 4.1.
Marcelo Fabri #2021
Fix some cases where violations would still be triggered when using the ignores_function_declarations configuration of line_length rule.
Manabu Nakazawa
Fix false positive in empty_enum_arguments rule when using closures.
Marcelo Fabri #2041
Fix false positives in force_unwrapping rule when declaring functions that return implicitly unwrapped collections (for example [Int]! or [AnyHashable: Any]!).
Marcelo Fabri #2042
Fix directories with a .swift suffix being treated as files.
Jamie Edge #1948

0.24.2: Dented Tumbler

Breaking

None.

Enhancements

None.

Bug Fixes

No longer log if the indentation key isn't set in the configuration file.
JP Simard #1998

0.24.1: Dented Tumbler

Breaking

None.

Enhancements

Invalidate cache when Swift patch version changes.
Norio Nomura
Add private_action opt-in rule which warns against public @IBAction methods.
Ornithologist Coder #1931
Add yoda_condition opt-in rule which warns when Yoda conditions are used. That is, when the constant portion of the expression is on the left side of a conditional statement.
Daniel Metzing #1924
Indentation can now be specified via a configuration file.
Noah McCann RubenSandwich #319
Add required_enum_case opt-in rule which allows enums that conform to protocols to require one or more cases. Useful for result enums.
Donald Ritter
Add discouraged_object_literal opt-in rule which encourages initializers over object literals.
Ornithologist Coder #1987
Adds prefixed_toplevel_constant opt-in rule which encourages top-level constants to be prefixed by k.
Ornithologist Coder #1907
Added explicit_acl opt-in rule to enforce explicit access control levels.
Josep Rodriguez #1822

Bug Fixes

Fix false positives in control_statement rule when methods with keyword names are used.
Marcelo Fabri #1946
Fix false positives in for_where rule when pattern matching (if case) is used.
Marcelo Fabri #1968
Fix false positives in unused_closure_parameter rule when closure is wrapped in parentheses.
JP Simard #1979

0.24.0: Timed Dry

Breaking

SwiftLint now requires Xcode 9 and Swift 3.2+ to build.
Marcelo Fabri
Remove SwiftExpressionKind.other.
Marcelo Fabri

Enhancements

Add sorted_first_last opt-in rule to encourage using min() or max() over sorted().first or sorted().last.
Tom Quist #1932
Add quick_discouraged_focused_test opt-in rule which warns against focused tests in Quick tests.
Ornithologist Coder #1905
Add override_in_extension opt-in rule that warns against overriding declarations in an extension.
Marcelo Fabri #1884
Add [f,x]{describe, context, itBehavesLike} to quick_discouraged_call rule.
Ornithologist Coder #1903
Add quick_discouraged_pending_test opt-in rule which warns against pending tests in Quick tests.
Ornithologist Coder #1909
Speed up equality tests for [Rule] and Configuration values.
JP Simard
Make Configuration conform to Hashable.
JP Simard
Speed up reading cached results by about 200%.
JP Simard
Add catch to the statements checked by the control_statement rule.
JP Simard
Make sorted_imports correctable.
Samuel Susla JP Simard #1822
Make sorted_imports only validate within "groups" of imports on directly adjacent lines.
Samuel Susla JP Simard #1822

Bug Fixes

Extend first_where and contains_over_first_not_nil rules to also detect cases where calls to filter and first are parenthesized.
Tom Quist
Correct equality tests for Configuration values. They previously didn't account for warningThreshold or cachePath.
JP Simard
Fix false positive in multiline_parameters rule when parameter is a closure with default value.
Ornithologist Coder #1912
Fix caching on Linux.
JP Simard
Fix crashes due to races.
JP Simard
Fix String.characters deprecation warnings when compiling with Swift 4.0.2.
JP Simard

0.23.1: Rewash: Forgotten Load Edition

Breaking

None.

Enhancements

None.

Bug Fixes

Fix false positive in array_init rule when using a map that doesn't take a closure.
Marcelo Fabri #1878
superfluous_disable_command rule can now be disabled as expected when using // swiftlint:disable superfluous_disable_command.
Marcelo Fabri #1890

0.23.0: Permanent Press Cycle

Breaking

None.

Enhancements

Fix csv reporter to output records with new lines.
atetlaw
Add contains_over_first_not_nil rule to encourage using contains over first(where:) != nil.
Samuel Susla #1514
Add fallthrough rule that flags usage of fallthrough.
Marcelo Fabri #1834
Improve colon rule to catch violations in dictionary types (e.g. [String: Int]), when using Any and on function calls.
Marcelo Fabri #1074 #1389
Add switch_case_alignment rule to validate that case and default statements are vertically aligned with their enclosing switch statement.
Austin Lu
Add array_init opt-in rule to validate that Array(foo) should be preferred over foo.map({ $0 }).
Marcelo Fabri #1271
Truncate long configuration console descriptions to fit in the console window when running swiftlint rules.
JP Simard #1002
Add multiline_arguments opt-in rule that warns to either keep all the arguments of a function call on the same line, or one per line.
Marcel Jackwerth
Add unneeded_break_in_switch rule to validate that no extra breaks are added in switch statements.
Marcelo Fabri #1870
Add literal_expression_end_indentation opt-in rule to validate that array and dictionary literals ends have the same indentation as the line that started them.
Marcelo Fabri #1435

Bug Fixes

Improve how opening_brace rule reports violations locations.
Marcelo Fabri #1811
Fix false negatives in unneeded_parentheses_in_closure_argument rule when using capture lists.
Marcelo Fabri #1817
Fix handling of attributes (lazy, objc, etc.) for the let_var_whitespace rule.
David Catmull #1770 #1812
Fix false positives in for_where rule when using if var inside for.
Marcelo Fabri #1838
Fix false positive in class_delegate_protocol rule when using Swift 4.0.1.
Marcelo Fabri #1856
Print multi-line configuration values in a single line when running swiftlint rules to avoid breaking the table format.
JP Simard #1002
Ignore SwiftLint commands (swiftlint:(disable|enable)) in file_header rule, making it work better with superfluous_disable_command rule.
Marcelo Fabri #1810
Fix false negatives in generic_type_name, identifier_name and type_name rules when using allowed_symbols.
Marcelo Fabri

0.22.0: Wrinkle-free

Breaking

Nested configurations will now be merged with parent configurations rather than replace them outright.
Stéphane Copin JP Simard #676

Enhancements

Add is_disjoint rule to encourage using Set.isDisjoint(with:) over Set.intersection(_:).isEmpty.
JP Simard
Add xctfail_message rule to enforce XCTFail calls to include a description of the assertion.
Ornithologist Coder #1370
Add joined_default_parameter correctable opt-in rule to discourage explicit usage of the default separator.
Ornithologist Coder #1093 #1757
Files with extensions other than .swift can now be used as arguments to --file when linting or autocorrecting.
Marcelo Fabri #1721
Allow ()?, Void?, ()!, and Void! as return types in redundant_void_return rule.
Ryan Booker #1761
Add single_test_class opt-in rule to validate that test files only contain a single QuickSpec or XCTestCase subclass.
Ornithologist Coder #1779
Produce an error when a // swiftlint:disable command does not silence any violations.
JP Simard #1102
Add quick_discouraged_call opt-in rule to discourage calls and object initialization inside 'describe' and 'context' block in Quick tests.
Ornithologist Coder #1781
Invalidate cache when Swift version changes.
Marcelo Fabri
Add pattern_matching_keywords opt-in rule to enforce moving let and var keywords outside tuples in a switch.
Marcelo Fabri #202
Add explicit_enum_raw_value opt-in rule to allow refactoring the Swift API without breaking the API contract.
Mazyod #1778
Add no_grouping_extension opt-in rule to disallow the use of extensions for code grouping purposes within the same file.
Mazyod #1767
Improve syntactic_sugar violation message to be type-specific.
Marcelo Fabri #1803
Add multiple_closures_with_trailing_closure rule that disallows trailing closure syntax when passing more than one closure argument to a function.
Erik Strottmann #1801

Bug Fixes

Fix false positive on force_unwrapping rule when declaring local variable with implicity unwrapped type.
Otávio Lima #1710
Fix the warning message and autocorrection of vertical_whitespace rule to display the maximum empty lines allowed if max_empty_lines is greater than 1.
Hossam Ghareeb #1763
Fix for the wrong configuration being used when using --path and a configuration exists in a parent directory.
Marcelo Fabri #1744
Fix false positive on unused_enumerated rule with complex variable bindings.
Marcelo Fabri #1787
Fix incorrect violations and autocorrections on unneeded_parentheses_in_closure_argument rule that were generated in some cases (mainly when using chained method calls with closures).
Marcelo Fabri

0.21.0: Vintage Washboard

Breaking

Xcode 8.3 or later and Swift 3.1 or later are required to build.
Norio Nomura

Enhancements

Rules are now categorized as lint, idiomatic, style, metrics or performance. Currently this is just used for documentation purposes when you run swiftlint rules or swiftlint generate-docs.
Marcelo Fabri
Add rules documentation generation.
Marcelo Fabri #1078
Add private_over_fileprivate correctable rule to check for top-level usages of fileprivate and recommend private instead. This is in line with SE-0169's goal "for fileprivate to be used rarely". There is a also a new strict_fileprivate opt-in rule that will mark every fileprivate as a violation (especially useful with Swift 4).
Jose Cheyo Jimenez Marcelo Fabri #1469 #1058
Add let_var_whitespace opt-in rule to enforce that let/var declarations should be separated from other statements by a single blank line.
Uncommon #1461
Improve performance when linting and correcting on Linux, matching macOS behavior.
JP Simard #1577
Don't trigger implicit_getter violations when attributes (such as mutating or @inline) are present.
Marcelo Fabri #1309 #1589
Add --use-tabs option to AutoCorrectOptions, enabling formatting using tabs over spaces.
Cody Winton #1327
Improve autocorrect performance by running it in parallel.
Marcelo Fabri #1578
Support building with Xcode 9 beta 3 in Swift 3.2 mode.
JP Simard
Add support for optional error severity level configuration.
Jamie Edge Marcelo Fabri #1647
Add unneeded_parentheses_in_closure_argument opt-in correctable rule that warns against using parentheses around argument declarations in closures.
Marcelo Fabri #1483
Add --disabled flag to swiftlint rules to print only rules that are not enabled in the configuration.
Marcelo Fabri
Add ignore_comment_only_lines boolean configuration option to file_length rule. With the option enabled, file_length will ignore lines which have only comments.
Samuel Susla #1165
Improve file_header rule description.
Marcelo Fabri #1492
Add trailing_closure opt-in rule that validates that trailing closure syntax should be used whenever possible.
Marcelo Fabri #54
Shebang (#!) in the beginning of a file is now ignored by all rules.
Marcelo Fabri #1294
Add block_based_kvo rule that enforces the usage of the new block based KVO API added when linting with Swift 3.2 or later.
Marcelo Fabri #1714
Make file_header rule ignore doc comments.
Marcelo Fabri #1719
Allow using environment variables in a configuration file in the form of ${SOME_VARIABLE}. The variables will be expanded when the configuration is first loaded.
Marcelo Fabri #1512
Treat yes, no, on and off as strings (and not booleans) when loading configuration files.
Marcelo Fabri #1424
Add discouraged_direct_init rule that discourages direct initialization of certain types.
Ornithologist Coder #1306

Bug Fixes

Fix false positive on redundant_discardable_let rule when using while statements.
Marcelo Fabri #1669
Fix all custom rules not being applied when any rule is configured incorrectly.
Jamie Edge #1586
Fix crash when using --config with a relative path and --path with a file.
Marcelo Fabri #1694
Fix mark rule corrections generating invalid code in some cases.
Marcelo Fabri #1029
Fix false positive in empty_enum_arguments rule when using wildcards and where clauses.
Marcelo Fabri #1722
Fix false positive in large_tuple rule when using throwing closure.
Liquidsoul
Make vertical_parameter_alignment more robust, fixing false positives and detecting previously missed violations.
JP Simard #1488

0.20.1: More Liquid Fabric Softener

Breaking

None.

Enhancements

None.

Bug Fixes

Fix typo in FatalErrorMessageRule.
Alexander Lash
Don't trigger an extension_access_modifier violation when all extension members are open, as open extension is not supported by Swift.
Marcelo Fabri #1629
Don't trigger a vertical_parameter_alignment_on_call violation when trailing closures are used.
Marcelo Fabri #1635
Make vertical_parameter_alignment_on_call more flexible when multiline parameters are used.
Marcelo Fabri #1630 #1643
Use the directory's .swiftlint.yml when --path is used.
Marcelo Fabri #1631

0.20.0: Liquid Fabric Softener

Breaking

None.

Enhancements

Detect more violations of force_unwrapping when using subscripts.
Otávio Lima
Match (Void) as return type in the void_return rule.
Anders Hasselqvist
Add multiline_parameters opt-in rule that warns to either keep all the parameters of a method or function on the same line, or one per line.
Ornithologist Coder
Update function_parameter_count rule to ignore overridden methods.
Markus Gasser #1562
Skip files with valid cache & no violations when auto correcting.
Marcelo Fabri #1554
Don't trigger violations from the private_unit_test rule when a method has parameters.
Marcelo Fabri #1532
Don't trigger violations from the discarded_notification_center_observer rule when the observer is being returned from a function that is not marked as @discardableResult.
Marcelo Fabri #1525
Add extension_access_modifier opt-in rule validating that if all the declarations in a given extension have the same Access Control Level, the ACL keyword should be applied to the top-level extension.
Marcelo Fabri #1546
Add vertical_parameter_alignment_on_call opt-in rule that validates that parameters are vertically aligned on a method call.
Marcelo Fabri #1037
Add code_literal and image_literal boolean configuration options to object_literal rule. They allow to only check for one or the other literal type instead of both together.
Cihat Gündüz #1587

Bug Fixes

Fix false positive in empty_enum_arguments rule when calling methods.
Marcelo Fabri #1597
Fix crash in unused_closure_parameter rule when using unicode identifiers.
Woo-Sik Byun Marcelo Fabri
Fix two false positives in force_unwrapping rule.
Otávio Lima #614 #977 #1614
Fix custom rules not working correctly with comment commands.
JP Simard #1558
Fix incorrectly using configuration files named .swiftlint.yml when they are located in the same directory as a differently-named, user-provided custom configuration file.
JP Simard #1531
Fix empty_count rule false positive in words that include "count".
Marcelo Fabri #1622
Use validates_start_with_lowercase key when decoding configurations for generic_type_name, identifier_name and type_name rules. This key was used on the docs, but internally validates_start_lowercase was used.
Marcelo Fabri #1626

0.19.0: Coin-Operated Machine

Breaking

Remove support for Swift 2.
Marcelo Fabri #1453
Remove missing_docs and valid_docs rules since they were already disabled.
Marcelo Fabri #1453
Add modificationDate(forFileAtPath:) function requirement to LintableFileManager protocol.
Victor Pimentel
Several breaking changes to LinterCache.
Victor Pimentel JP Simard
Remove Configuration.hash property.
Victor Pimentel
Rename ConditionalReturnsOnNewline struct to ConditionalReturnsOnNewlineRule to match rule naming conventions.
JP Simard

Enhancements

Cache linter results for files unmodified since the previous linter run.
Victor Pimentel JP Simard Marcelo Fabri #1184 #1550
Add opt-in configurations to generic_type_name, identifier_name and type_name rules to allow excluding non-alphanumeric characters and names that start with uppercase.
Javier Hernández #541
Adds support for excluded in custom rules to exclude files.
Nigel Flack #1437
Make trailing_comma rule autocorrectable.
Samuel Susla Jeremy David Giesbrecht #1326
Added no_extension_access_modifier opt-in rule to disallow access modifiers completely, à la SE-0119.
Jose Cheyo Jimenez #1457
Add lowercase and missing colon checks to the mark rule.
Jason Moore
Improve violation reason wording in function_body_length, large_type, and type_body_length rules. ultimatedbz
Add explicit_top_level_acl opt-in rule that validates that all top level declarations should explicitly be marked with an Access Control Level (private, fileprivate, internal, public or open).
J. Cheyo Jimenez Marcelo Fabri #58
Add implicit_return opt-in rule that warns against using the return keyword when it can be omitted inside closures.
Marcelo Fabri #1194
Add option to unused_optional_binding rule to ignore try? in guard statements.
Sega-Zero #1432
Add empty_enum_arguments correctable rule that warns against using silent associated values inside a case.
Marcelo Fabri #1425 #1549
Remove file.zip from the Pods directory when installing SwiftLint via CocoaPods.
Hesham Salman #1507
Add protocol_property_accessors_order correctable rule that validates that the order of accessors is get set when declaring variables in protocols.
Marcelo Fabri #1504
Make Region & Command structs conform to Equatable.
JP Simard
Make closure_spacing a CorrectableRule.
J. Cheyo Jimenez

Bug Fixes

emoji and checkstyle reporter output report sorted by file name.
norio-nomura #1429
Prevent false positive in shorthand_operator rule.
sammy-SC #1254
Fix typo in DiscardedNotificationCenterObserverRule.
Spencer Kaiser
Fix empty_parameters rule with Swift 3.
Marcelo Fabri #1460
Prevent triggering redundant_optional_initialization rule on a lazy var since it needs initialization.
Marcelo Fabri #1334
Fix ignores_case_statements key in cyclomatic_complexity description.
Jeff Blagdon #1434
Fall back to reporting violations on line 1 if no line was provided for the violation's location, ensuring Xcode always displays the warning or error.
rjhodge JP Simard #1520
Fix crash or incorrect violation location with strings including multi-byte unicode characters.
Marcelo Fabri #1006
Fix false positive in syntactic_sugar rule when using nested types named Optional, ImplicitlyUnwrappedOptional, Array or Dictionary.
Marcelo Fabri #1508
Fix false positives in prohibited_super_call & overridden_super_call rules where calls to super were done in nested scopes such as defer blocks.
JP Simard #1301
Fix non-root configurations logging configuration warnings more than once.
JP Simard #949
Fix some overlapping // swiftlint commands not being applied.
JP Simard #1388

0.18.1: Misaligned Drum

Breaking

None.

Enhancements

None.

Bug Fixes

Compile releases in the 'Release' configuration rather than 'Debug'.

0.18.0: Misaligned Drum

Breaking

Replace YamlSwift with Yams. SwiftLint no longer includes YamlSwift. If your project implicitly depends on YamlSwift, you need to modify it to depend on YamlSwift explicitly.
norio-nomura #1412

Yams interprets YAML more strictly than YamlSwift, so if your YAML configurations previously worked with SwiftLint but didn't fully conform to the YAML 1.2 standard, you'll need to fix those validation errors. For example:

custom_rules:
  wrong_regex:
    name: "wrong regex"
    regex: "((assert|precondition)\(false)" # '\' in "" means escape sequence
  strict_regex:
    name: "strict regex"
    regex: '((assert|precondition)\(false)' # Use single quotes

Enhancements

Support compiling with Xcode 8.3 and Swift 3.1.
Keith Smiley
Fix false positives on for_where rule and skip violation on complex conditions.
Marcelo Fabri #1387
Print YAML configuration errors in locatable format compatible with Xcode's Issue Navigator.

Bug Fixes

Fix --lenient enforcement not being applied to all violations.
aaroncrespo #1391
Fix false positives in unused_optional_binding rule.
Daniel Rodríguez Troitiño #1376
Fix false positives in redundant_discardable_let rule.
Jeremy David Giesbrecht #1415

0.17.0: Extra Rinse Cycle

Breaking

variable_name rule (VariableNameRule) is now identifier_name (IdentifierNameRule) as it validates other identifiers as well.
Marcelo Fabri #663
Fix sorted_imports rule to sort ignoring case.
Keith Smiley #1185
Temporarily disable cache when linting. This will be re-enabled in a future version after important cache-related issues have been addressed.
Marcelo Fabri

Enhancements

Add implicitly_unwrapped_optional opt-in rule that warns against using implicitly unwrapped optionals, except cases when this IUO is an IBOutlet.
Siarhei Fedartsou #56
Performance improvements to generic_type_name, redundant_nil_coalescing, mark, first_where and vertical_whitespace rules.
Marcelo Fabri
Add discarded_notification_center_observer rule that warns when the result of NotificationCenter.addObserver(forName:object:queue:using:) is not stored so it can be removed later.
Marcelo Fabri #1062
Add notification_center_detachment rule that warns against an object removing itself from NotificationCenter in an unsafe location.
Marcelo Fabri #1061
Accept AnyObject and NSObjectProtocol in class_delegate_protocol.
Jon Shier #1261
Add ignores_function_declarations and ignores_comments as options to LineLengthRule.
Michael L. Welles #598 #975
Add for_where rule that validates that where is used in a for loop instead of a single if expression inside the loop.
Marcelo Fabri #1228
unused_enumerated rule now warns when only the index is being used. You should use .indices instead of .enumerated() in this case.
Marcelo Fabri #1278
Add ignores_case_statements as option to CyclomaticComplexityRule.
Michael L. Welles #1298
Add correctable redundant_discardable_let rule that warns when let _ = foo() is used to discard a result from a function instead of _ = foo().
Marcelo Fabri #1232
Accept global and local variables in implicit_getter rule.
Marcelo Fabri
Add --enabled (or -e) switch to the rules CLI command, to only display enabled rules.
Natan Rolnik #1270
Now nesting rule can be configured with a type and statement level.
Hayashi Tatsuya #1318
Add explicit_type_interface opt-in rule that validates that the properties have an explicit type interface.
Kim de Vos
Add --lenient CLI option to lint command. Facilitates running a lint task that doesn't fail a pipeline of other tasks.
aaroncrespo #1322
Add fatal_error_message opt-in rule that validates that fatalError() calls have a message.
Kim de Vos #1348

Bug Fixes

Fix crashes when accessing cached regular expressions when linting in parallel.
JP Simard #1344
Fix a false positive on large_tuple rule when using closures.
Marcelo Fabri #1234
Fix force_unwrap false positive for bool negation.
Aaron McTavish #918
Fix false positive and wrong correction on number_separator rule.
Marcelo Fabri #1242
Retain closure parameter types when they are specified during autocorrect.
Allen Zeng #1175
Fix redundant_void_return matches if return type starts with Void~.
Hayashi Tatsuya
Ignore unused_closure_parameter rule on closures that are called inline.
Marcelo Fabri #1161
Disable valid_docs and missing_docs rules when running in Swift 2.3 or later as they have not been updated to work with those versions of Swift. Both rules are now opt-in because of this.
JP Simard #728
Fix false positive on large_tuple rule when using generics inside a tuple.
Marcelo Fabri #1257
Make ASTRule default implementation to navigate through the substructure even if its children are from a different kind. This fixes some violations not being reported in some contexts.
Marcelo Fabri #1237
Reimplement switch_case_on_newline rule to be an ASTRule and be more reliable, fixing some false negatives and false positives.
Marcelo Fabri #1268
Fix closure_end_indentation rule false positive when using single-line closures.
Marcelo Fabri #1216
Fix todo rule messages when the comment is not on a new line.
Marcelo Fabri #1304
Fix false negative on unused_closure_parameter rule.
Hayashi Tatsuya
Fix checkstyle report format.
Yuki Oya

0.16.1: Commutative Fabric Sheets

Breaking

None.

Enhancements

Improve unused_optional_binding rule on tuples check.
Rafael Machado
Update variable_name to ignore overrides.
Aaron McTavish #1169
Update number_separator rule to allow for specifying minimum length of fraction.
Bjarke Søndergaard #1200
Update legacy_constant rule to support CGFloat.pi and Float.pi.
Aaron McTavish #1198

Bug Fixes

Fix false positives on shorthand_operator rule.
Marcelo Fabri #1156 #1163
Fix false positive on redundant_optional_initialization rule.
Marcelo Fabri #1159
Fix false positive on operator_usage_whitespace rule with decimal literals in exponent format.
Marcelo Fabri #1153
Fix excluded configuration not excluding files.
Marcelo Fabri #1166
Disable commutative operations on shorthand_operator rule.
Marcelo Fabri #1182 #1183 #1211
Fix crash when running in a Sandboxed environment, which also fixes Homebrew distribution. Set the SWIFTLINT_SWIFT_VERSION environment variable to either 2 or 3 to force that operation mode, bypassing the Swift version determined from SourceKit.
JP Simard

0.16.0: Maximum Energy Efficiency Setting

Breaking

Several API breaking changes were made to conform to the Swift 3 API Design Guidelines. We apologize for any inconvenience this may have caused.

Enhancements

Speed up linting by caching linter results across invocations.
Marcelo Fabri #868
Speed up linting by processing multiple files and rules concurrently.
JP Simard #1077
Make many operations in SwiftLintFramework safe to call in multithreaded scenarios, including accessing Linter.styleViolations.
JP Simard #1077
Permit unsigned and explicitly-sized integer types in valid_ibinspectable
Daniel Duan
Make nimble_operator rule correctable.
Vojta Stavik
Add vertical_parameter_alignment rule that checks if parameters are vertically aligned for multi-line function declarations.
Marcelo Fabri #1033
Add more helpful reason strings to TrailingCommaRule.
Matt Rubin
Add class_delegate_protocol rule that warns against protocol declarations that aren't marked as : class or @objc.
Marcelo Fabri #1039
Add correctable redundant_optional_initialization rule that warns against initializing optional variables with nil.
Marcelo Fabri #1052
redundant_nil_coalescing rule is now correctable.
Marcelo Fabri
Make number_separator rule correctable.
Marcelo Fabri
empty_parentheses_with_trailing_closure rule is now correctable.
Marcelo Fabri
Add correctable redundant_void_return rule that warns against explicitly adding -> Void to functions.
Marcelo Fabri #1066
Add an opt-in rule that enforces alphabetical sorting of imports.
Scott Berrevoets #900
type_name rule forces enum values to be UpperCamelCase again when used with Swift 2.3.
Marcelo Fabri #1090
Make weak_delegate rule ignore computed properties.
Rafael Machado #1089
Add object_literal opt-in rule that warns against using image and color inits that can be replaced for #imageLiteral or #colorLiteral in Swift 3.
Marcelo Fabri #1060
Now number_separator rule can be configured with a minimum length.
Marcelo Fabri #1109
Add compiler_protocol_init rule that flags usage of initializers declared in protocols used by the compiler such as ExpressibleByArrayLiteral that shouldn't be called directly. Instead, you should use a literal anywhere a concrete type conforming to the protocol is expected by the context.
Marcelo Fabri #1096
Add large_tuple configurable rule that validates that tuples shouldn't have too many members.
Marcelo Fabri #1065
Add generic_type_name rule that validates generic constraint type names.
Marcelo Fabri #51
Update vertical_whitespace rule to allow configuration of the number of consecutive empty lines before a violation using max_empty_lines. The default value is still 1 line.
Aaron McTavish #769
Add check to ignore urls in line_length rule when ignores_urls configuration is enabled.
Javier Hernández #384
Add shorthand_operator rule that validates that shorthand operators should be used when possible.
Marcelo Fabri #902
Allow specifying a swiftlint_version configuration key which will log a warning if the current running version of SwiftLint is different than this value.
JP Simard #221
Add internal support for deprecated rule aliases.
Marcelo Fabri #973
Add unused_optional_binding rule that will check for optional bindings not being used.
Rafael Machado #1116

Bug Fixes

Ignore close parentheses on vertical_parameter_alignment rule.
Marcelo Fabri #1042
syntactic_sugar rule now doesn't flag declarations that can't be fixed.
Marcelo Fabri #928
Fix false positives on closure_parameter_position and unused_closure_parameter rules with Swift 2.3.
Marcelo Fabri #1019
Fix crash on trailing_comma rule with Swift 2.3.
Marcelo Fabri #921
Fix out of range exception in AttributesRule.
JP Simard #1105
Fix variable_name and type_name rules on Linux.
Marcelo Fabri
Fix linting directories with names ending with .swift.
JP Simard
Fix running swiftlint version when building with Swift Package Manager.
Marcelo Fabri #1045
Fix false positive on vertical_parameter_alignment rule when breaking line in a default parameter declaration.
Marcelo Fabri #1129

0.15.0: Hand Washable Holiday Linens 🎄

Breaking

line_length rule now has a default value of 120 for warnings.
Marcelo Fabri #1008

Enhancements

Add closure_end_indentation opt-in rule that validates closure closing braces according to these rules:
- If the method call has chained breaking lines on each method (. is on a new line), the closing brace should be vertically aligned with the ..
- Otherwise, the closing brace should be vertically aligned with the beginning of the statement in the first line.
Marcelo Fabri #326
operator_usage_whitespace rule is now correctable.
Marcelo Fabri
implicit_getter and mark rule performance improvements.
Marcelo Fabri
HTML reports now display a relative path to files.
Jamie Edge
colon rule now validates colon position in dictionaries too. You can disable this new validation with the apply_to_dictionaries configuration.
Marcelo Fabri #603
Add first_where opt-in rule that warns against using .filter { /* ... */ }.first in collections, as .first(where: { /* ... */ }) is often more efficient.
Marcelo Fabri #1005

Bug Fixes

FunctionParameterCountRule also ignores generic initializers.
Mauricio Hanika
Grammar checks.
Michael Helmbrecht
Fix the validity and styling of the HTML reporter.
Jamie Edge
Fix false positive in empty_parentheses_with_trailing_closure rule.
Marcelo Fabri #1021
Fix false positive in switch_case_on_newline when switching over a selector.
Marcelo Fabri #1020
Fix crash in closure_parameter_position rule.
Marcelo Fabri #1026
Fix false positive in operator_usage_whitespace rule when using image literals.
Marcelo Fabri #1028

0.14.0: Super Awesome Retractable Drying Rack

Breaking

SwiftLint now requires Xcode 8.x and Swift 3.x to build. APIs have not yet been adapted to conform to the Swift 3 API Design Guidelines but will shortly.
JP Simard Norio Nomura

Enhancements

Now builds and passes most tests on Linux using the Swift Package Manager with Swift 3. This requires libsourcekitdInProc.so to be built and located in /usr/lib, or in another location specified by the LINUX_SOURCEKIT_LIB_PATH environment variable. A preconfigured Docker image is available on Docker Hub by the ID of norionomura/sourcekit:302.
JP Simard Norio Nomura #732
Add dynamic_inline rule to discourage combination of @inline(__always) and dynamic function attributes.
Daniel Duan
Add number_separator opt-in rule that enforces that underscores are used as thousand separators in large numbers.
Marcelo Fabri #924
Add file_header opt-in rule that warns when a file contains a copyright comment header, such as the one Xcode adds by default.
Marcelo Fabri #844
FunctionParameterCountRule now ignores initializers.
Denis Lebedev #544
Add EmojiReporter: a human friendly reporter.
Michał Kałużny
Add redundant_string_enum_value rule that warns against String enums with redundant value assignments.
Marcelo Fabri #946
Add attributes opt-in rule which validates if an attribute (@objc, @IBOutlet, @discardableResult, etc) is in the right position:
- If the attribute is @IBAction or @NSManaged, it should always be on the same line as the declaration
- If the attribute has parameters, it should always be on the line above the declaration
- Otherwise:
  - if the attribute is applied to a variable, it should be on the same line
  - if it's applied to a type or function, it should be on the line above
  - if it's applied to an import (the only option is @testable import), it should be on the same line. You can also configure what attributes should be always on a new line or on the same line as the declaration with the always_on_same_line and always_on_line_above keys.
Marcelo Fabri #846
Add empty_parentheses_with_trailing_closure rule that checks for empty parentheses after method call when using trailing closures.
Marcelo Fabri #885
Add closure_parameter_position rule that validates that closure parameters are in the same line as the opening brace.
Marcelo Fabri #931
type_name rule now validates typealias and associatedtype too.
Marcelo Fabri #49 #956
Add ProhibitedSuperRule opt-in rule that warns about methods calling to super that should not, for example UIViewController.loadView().
Aaron McTavish #970
Add correctable void_return rule to validate usage of -> Void over -> ().
Marcelo Fabri JP Simard #964
Add correctable empty_parameters rule to validate usage of () -> over Void -> .
Marcelo Fabri #573
Add operator_usage_whitespace opt-in rule to validate that operators are surrounded by a single whitespace when they are being used.
Marcelo Fabri #626
Add unused_closure_parameter correctable rule that validates if all closure parameters are being used. If a parameter is unused, it should be replaced by _.
Marcelo Fabri JP Simard #982
Add unused_enumerated rule that warns against unused indexes when using .enumerated() on a for loop, e.g. for (_, foo) in bar.enumerated().
Marcelo Fabri #619

Bug Fixes

Fix weak_delegate rule reporting a violation for variables containing but not ending in delegate.
Phil Webster
Fix weak_delegate rule reporting a violation for variables in protocol declarations.
Marcelo Fabri #934
Fix trailing_comma rule reporting a violation for commas in comments.
Marcelo Fabri #940
Fix XML reporters not escaping characters.
Fabian Ehrentraud #968
Fix specifying multiple rule identifiers in comment commands.
JP Simard #976
Fix invalid CSS in HTML reporter template.
Aaron McTavish #981
Fix crash when correcting statement_position rule when there are multi-byte characters in the file.
Marcelo Fabri

0.13.2: Light Cycle

Breaking

None.

Enhancements

TrailingCommaRule now only triggers when a declaration is multi-line when using mandatory_comma: true.
Marcelo Fabri #910 #911

Bug Fixes

Fix MarkRule reporting a violation for // MARK: -, which is valid.
JP Simard #778

0.13.1: Heavy Cycle

Breaking

None.

Enhancements

Add ImplicitGetterRule to warn against using get on computed read-only properties.
Marcelo Fabri #57
Add WeakDelegateRule rule to enforce delegate instance variables to be marked as weak.
Olivier Halligon
Add SyntacticSugar rule that enforces that shorthanded syntax should be used when possible, for example [Int] instead of Array<Int>.
Marcelo Fabri #319
Allow specifying multiple rule identifiers in comment commands. For example, // swiftlint:disable:next force_cast force_try. Works with all command types (disable/enable) and modifiers (next, this, previous or blank).
JP Simard #861
Add NimbleOperatorRule opt-in rule that enforces using operator overloads instead of free matcher functions when using Nimble.
Marcelo Fabri #881
closure_spacing rule now accepts empty bodies with a space.
Marcelo Fabri #875
Add TrailingCommaRule to enforce/forbid trailing commas in arrays and dictionaries. The default is to forbid them, but this can be changed with the mandatory_comma configuration.
Marcelo Fabri #883
Add support for fileprivate in PrivateOutletRule and PrivateUnitTestRule.
Marcelo Fabri #781 #831
Make MarkRule correctable.
kohtenko

Bug Fixes

Rule out a few invalid @IBInspectable cases in valid_ibinspectable.
Daniel Duan
Fix a few edge cases where malformed MARK: comments wouldn't trigger a violation.
JP Simard #805
Now lints single files passed to --path even if this file is excluded from the configuration file (.swiftlint.yml).
JP Simard
Fixed error severity configuration in colon rule.
Marcelo Fabri #863
switch_case_on_newline rule should ignore trailing comments.
Marcelo Fabri #874
switch_case_on_newline rule shouldn't trigger on enums.
Marcelo Fabri #878
Fix regex bug in Comma Rule causing some violations to not be triggered when there were consecutive violations in the same expression.
Savio Figueiredo #872

0.13.0: MakeYourClothesCleanAgain

Breaking

None.

Enhancements

Add ignores_comment configuration for trailing_whitespace rule.
Javier Hernández #576
Added HTML reporter, identifier is html.
Johnykutty Mathew
Add SuperCallRule opt-in rule that warns about methods not calling to super.
Angel G. Olloqui #803
Add RedundantNilCoalesingRule opt-in rule that warns against ?? nil.
Daniel Beard #764
Added opt-in rule to makes closure expressions spacing consistent.
J. Cheyo Jimenez #770
Adds allow_private_set configuration for the private_outlet rule.
Rohan Dhaimade
Swift 2.3 support.
Norio Nomura, Syo Ikeda
Color literals count as single characters to avoid unintentional line length violations.
Jonas #742
Add SwitchCaseOnNewlineRule opt-in rule that enforces a newline after case pattern: in a switch.
Marcelo Fabri #681
Add ValidIBInspectableRule rule that checks if @IBInspectable declarations are valid. An @IBInspectable is valid if:
- It's declared as a var (not let)
- Its type is explicit (not inferred)
- Its type is one of the supported types
Marcelo Fabri #756
Add ExplicitInitRule opt-in rule to discourage calling init directly.
Matt Taube #715

Bug Fixes

Fixed whitespace being added to TODO messages.
W. Bagdon #792
Fixed regex bug in Vertical Whitespace Rule by using SourceKitten instead. The rule now enabled by default again (no longer opt-in).
J. Cheyo Jimenez #772
Correctable rules no longer apply corrections if the rule is locally disabled.
J. Cheyo Jimenez
#601
Fixed regex bug in Mark Rule where MARK could not be used with only a hyphen but no descriptive text: // MARK: -.
Ruotger Deecke #778
Fixed: Private unit test rule not scoped to test classes.
Fixed: Private unit test rule config is ignored if regex is missing.
Cristian Filipov #786
Fixed: ConditionalReturnsOnNewline now respects severity configuration.
Rohan Dhaimade #783
Fixed: ConditionalReturnsOnNewline now checks if return is a keyword, avoiding false positives.
Marcelo Fabri #784
ForceUnwrappingRule did not recognize force unwraps in return statements using subscript.
Norio Nomura #813

0.12.0: Vertical Laundry

Breaking

Fixed: SwiftLint assumes paths in the YAML config file are relative to the current directory even when --path is passed as an argument.
Cristian Filipov

Enhancements

Add --enable-all-rules CLI option to lint command to facilitate running all rules, even opt-in and disabled ones, ignoring whitelist_rules.
JP Simard #1170

Bug Fixes

Made Vertical Whitespace Rule added in 0.11.2 opt-in due to performance issues.
JP Simard #772

0.11.2: Communal Clothesline

This release has seen a phenomenal uptake in community contributions!

Breaking

None.

Enhancements

Add MarkRule rule to enforce // MARK syntax.
Krzysztof Rodak #749
Add PrivateOutletRule opt-in rule to enforce @IBOutlet instance variables to be private.
Olivier Halligon
Add content of the todo statement to message.
J. Cheyo Jimenez #478
Add LegacyNSGeometryFunctionsRule rule. Add NSSize, NSPoint, and NSRect constants and constructors to existing rules.
David Rönnqvist
Added Vertical Whitespace Rule.
J. Cheyo Jimenez #548
Removed ConditionalBindingCascadeRule.
J. Cheyo Jimenez #701
Allow setting flexible_right_spacing configuration for the colon rule.
Shai Mishali #730
Add Junit reporter.
Matthew Ellis
LeadingWhitespaceRule is now auto correctable.
masters3d
Add included regex for custom rules to control what files are processed.
bootstraponline #689
Add rule to check for private unit tests (private unit tests don't get run by XCTest).
Cristian Filipov
Add configuration for setting a warning threshold.
woodhamgh 696
Adds 'ConditionalReturnsOnNewLineRule' rule.
Rohan Dhaimade
Made - returns: doc optional for initializers.
Mohpor #557

Bug Fixes

Fixed CustomRule Regex.
J. Cheyo Jimenez #717 #726
Allow disabling custom rules in code.
J. Cheyo Jimenez #515
Fix LegacyConstructorRule when using variables instead of numbers.
Sarr Blaise #646
Fix force_unwrapping false positive inside strings.
Daniel Beard #721

0.11.1: Cuddles... Or Else!

Breaking

None.

Enhancements

Added statement_mode configuration to the statement_position rule. The
default mode keeps the current SwiftLint behavior of keeping else and catch statements on the same line as the closing brace before them. The uncuddled_elseconfiguration requires the else and catch to be on a new line with the same leading whitespace as the brace.
Mike Skiba #651

Bug Fixes

Remove extraneous argument label added in LegacyCGGeometryFunctionsRule autocorrect.
Sarr Blaise 643

0.11.0: Laundromat Format

Breaking

Now type_name allows lowercase enum values to match the Swift API Design Guidelines.
Jorge Bernal #654
Embedding frameworks needed by swiftlint was moved from SwiftLintFramework Xcode target to the swiftlint target. The SwiftLintFramework.framework product built by the SwiftLintFramework target no longer contains unnecessary frameworks or multiple copies of the Swift libraries.
Norio Nomura

Enhancements

Add --format option to autocorrect command which re-indents Swift files much like pasting into Xcode would. This option isn't currently configurable, but that can change if users request it.
JP Simard
Improve error messages for invalid configuration files.
Brian Hardy
Added the user-configurable option ignores_empty_lines to the trailing_whitespace rule. It can be used to control whether the TrailingWhitespaceRule should report and correct whitespace-indented empty lines. Defaults to false. Added unit tests.
Reimar Twelker

Bug Fixes

Fix false positive in conditional binding cascade violation.
Norio Nomura #642
Another conditional binding fix, this time for enum that has two parameters or an if statement with two case tests.
Andrew Rahn #667
Fix regression in CommaRule ignoring violations when the comma is followed by a comment.
Norio Nomura #683

0.10.0: `laundry-select` edition

Breaking

None.

Enhancements

Now libclang.dylib and sourcekitd.framework are dynamically loaded at runtime by SourceKittenFramework to use the versions included in the Xcode version specified by xcode-select -p or custom toolchains.
Norio Nomura #167
Add LegacyCGGeometryFunctionsRule rule.
Sarr Blaise #625
SwiftLint no longer crashes when SourceKitService crashes.
Norio Nomura
Rewrite conditional_binding_cascade rule.
Norio Nomura #617
Add autocorrect for ReturnArrowWhitespaceRule.
Craig Siemens

Bug Fixes

Failed to launch swiftlint when Xcode.app was placed at non standard path.
Norio Nomura #593
ClosingBraceRule no longer triggers across line breaks.
Josh Friend #592
LegacyConstantRule and LegacyConstructorRule failed to autocorrect.
Norio Nomura #623

0.9.2: Multiple Exhaust Codes

Breaking

None.

Enhancements

Return different exit codes to distinguish between types of errors:
- 0: No errors, maybe warnings in non-strict mode
- 1: Usage or system error
- 2: Style violations of severity "Error"
- 3: No style violations of severity "Error", but violations of severity "warning" with --strict
  JP Simard #166
VariableNameRule now accepts symbols starting with more than one uppercase letter to allow for names like XMLString or MIMEType.
Erik Aigner #566

Bug Fixes

Avoid overwriting files whose contents have not changed.
Neil Gall #574
Fix CommaRule mismatch between violations and corrections.
Norio Nomura #466
Fix more false positives in ForceUnwrappingRule.
Norio Nomura #546 #547

0.9.1: Air Duct Cleaning

Breaking

None.

Enhancements

None.

Bug Fixes

Fix force unwrap rule missed cases with quotes.
Norio Nomura #535
Fix issues with nested .swiftlint.yml file resolution.
Norio Nomura #543

0.9.0: Appliance Maintenance

Breaking

Linter.reporter has been removed and Configuration.reporterFromString(_:) has been renamed to a free function: reporterFromString(_:).
JP Simard
_ConfigProviderRule & ConfigurableRule have been removed and their requirements have been moved to Rule.
JP Simard
Configuration(path:optional:silent) has been changed to Configuration(path:rootPath:optional:quiet:).
JP Simard
The static function Configuration.rulesFromDict(_:ruleList:) has been moved to an instance method: RuleList.configuredRulesWithDictionary(_:).
JP Simard
The rules parameter in the Configuration initializer has been renamed to configuredRules.
JP Simard
Removed a large number of declarations from the public SwiftLintFramework API. This is being done to minimize the API surface area in preparation of a 1.0 release. See #507 for a complete record of this change.
JP Simard #479
All instances of the abbreviation "config" in the API have been expanded to "configuration". The --config command line parameter and use_nested_configs configuration key are unaffected.
JP Simard
The use_nested_configs configuration key has been deprecated and its value is now ignored. Nested configuration files are now always considered.
JP Simard

Enhancements

swiftlint lint now accepts an optional --reporter parameter which overrides existing reporter values in the configuration file. Choose between xcode (default), json, csv or checkstyle.
JP Simard #440
swiftlint rules now shows a configuration description for all rules.
JP Simard
lint and autocorrect commands now accept a --quiet flag that prevents status messages like 'Linting ' & 'Done linting' from being logged.
JP Simard #386
All top-level keys in a configuration file that accept an array now also accept a single value.
e.g. included: Source is equivalent to included:\n - Source.
JP Simard #120
Improve performance of FunctionParameterCountRule.
Norio Nomura
Improve performance of ColonRule.
Norio Nomura

Bug Fixes

Fix case sensitivity of keywords for valid_docs.
Ankit Aggarwal #298
Fixed inconsistencies between violations & corrections in StatementPositionRule.
JP Simard #466
A warning will now be logged when invalid top-level keys are included in the configuration file.
JP Simard #120
Fixed LegacyConstructorRule from correcting legacy constructors in string literals.
JP Simard #466
Fixed an issue where variable_name or type_name would always report a violation when configured with only a warning value on either min_length or max_length.
JP Simard #522

0.8.0: High Heat

Breaking

Setting only warning on SeverityLevelsConfig rules now disables the error value.
Robin Kunde #409
enabled_rules has been renamed to opt_in_rules.
Daniel Beard

Enhancements

Add whitelist_rules rule whitelists in config files.
Daniel Beard #256
Improve performance of ColonRule, LineLengthRule & syntaxKindsByLine.
Norio Nomura
Add command to display rule description: swiftlint rules <rule identifier>.
Tony Li #392
Add FunctionParameterCountRule.
Denis Lebedev #415
Measure complexity of nested functions separately in CyclomaticComplexityRule.
Denis Lebedev #424
Added exception for multi-line if/guard/while conditions to allow opening brace to be on a new line in OpeningBraceRule.
Scott Hoyt #355
The rules command now prints a table containing values for: identifier, opt-in, correctable, enabled in your config & configuration.
JP Simard #392
Reduce maximum memory usage.
Norio Nomura

Bug Fixes

Fix more false positives in ValidDocsRule.
diogoguimaraes #451
Fix trailing_newline autocorrect to handle more than one violation per line.
Daniel Beard #465
Fix complexity measurement for switch statements in CyclomaticComplexityRule.
Denis Lebedev #461

0.7.2: Appliance Manual

Breaking

None.

Enhancements

None.

Bug Fixes

Fix several false positives in ValidDocsRule.
diogoguimaraes #375

0.7.1: Delicate Cycle

Breaking

None.

Enhancements

Improve performance of MissingDocsRule.
Norio Nomura
Added CustomRules.
Scott Hoyt
#123
Added opt-in ForceUnwrappingRule to issue warnings for all forced unwrappings.
Benjamin Otto #55

Bug Fixes

Fix several false positives in ValidDocsRule.
diogoguimaraes #375

0.7.0: Automatic Permanent Press

Breaking

Replaced all uses of XPCDictionary with [String: SourceKitRepresentable].
JP Simard
VariableNameMinLengthRule and VariableNameMaxLengthRule have been removed. VariableNameRule now has this functionality.
Scott Hoyt
ViolationLevelRule has been removed. This functionality is now provided by ConfigProviderRule and SeverityLevelsConfig.
Scott Hoyt

Enhancements

TypeBodyLengthRule now does not count comment or whitespace lines.
Marcelo Fabri #369
FunctionBodyLengthRule now does not count comment or whitespace lines.
Marcelo Fabri #258
All Rules are now configurable in at least their severity: SeverityConfig.
Scott Hoyt #371 #130 #268
TypeNameRule and VariableNameRule conform to ConfigProviderRule using NameConfig to support min_length, max_length, and excluded names.
Scott Hoyt #388 #259 #191
Add CyclomaticComplexityRule.
Denis Lebedev

Bug Fixes

Fix crash caused by infinite recursion when using nested config files.
JP Simard #368
Fix crash when file contains NULL character.
Norio Nomura #379

0.6.0: Steam Cycle

Breaking

ParameterizedRule is removed. Use ConfigurableRule instead.
Scott Hoyt #353
To activate a Rule, it must be added to the global masterRuleList.
Scott Hoyt

Enhancements

ConfigurableRule protocol allows for improved rule configuration. See CONTRIBUTING for more details.
Scott Hoyt #303
VariableNameMinLengthRule now supports excluding certain variable names (e.g. "id").
Scott Hoyt #231
ViolationLevelRule provides default ConfigurableRule implementation for rules that only need integer error and warning levels.
Scott Hoyt
Add AutoCorrect for StatementPositionRule.
Raphael Randschau
Add AutoCorrect for CommaRule.
Raphael Randschau
Add AutoCorrect for LegacyConstructorRule.
Raphael Randschau
Improve performance of LineLengthRule.
Norio Nomura
Add ConditionalBindingCascadeRule.
Aaron McTavish #202
Opt-in rules are now supported.
JP Simard #256
Add LegacyConstantRule.
Aaron McTavish #319
Add opt-in rule to encourage checking isEmpty over comparing count to zero.
JP Simard #202
Add opt-in "Missing Docs" rule to detect undocumented public declarations.
JP Simard

Bug Fixes

None.

0.5.6: Bug FixLint

Breaking

None.

Enhancements

Improve performance by reducing calls to SourceKit.
Norio Nomura

Bug Fixes

Fix homebrew deployment issues.
Norio Nomura
AutoCorrect for TrailingNewlineRule only removes at most one line.
John Estropia
valid_docs did not detect tuple as return value.
Norio Nomura #324
Escape strings when using CSV reporter.
JP Simard

0.5.5: Magic Drying Fluff Balls™

http://www.amazon.com/Magic-Drying-Fluff-Balls-Softening/dp/B001EIW1SG

Breaking

None.

Enhancements

None.

Bug Fixes

Always fail if a YAML configuration file was found but could not be parsed.
JP Simard #310
Make commands with modifiers work for violations with line-only locations.
JP Simard #316

0.5.4: Bounce™

Breaking

Remove Location.init(file:offset:) in favor of the more explicit Location.init(file:byteOffset:) & Location.init(file:characterOffset:).
JP Simard

Enhancements

Add checkstyle reporter to generate XML reports in the Checkstyle 4.3 format.
JP Simard #277
Support command comment modifiers (previous, this & next) to limit the command's scope to a single line.
JP Simard #222
Add nested .swiftlint.yml configuration support.
Scott Hoyt #299

Bug Fixes

Fix multibyte handling in many rules.
JP Simard #279
Fix an NSRangeException crash.
Norio Nomura #294
The valid_docs rule now handles multibyte characters.
Norio Nomura #295

0.5.3: Mountain Scent

Breaking

None.

Enhancements

Improve autocorrect for OpeningBraceRule.
Yasuhiro Inami
Add autocorrect for ColonRule.
Brian Partridge
Add ClosingBraceRule.
Yasuhiro Inami

Bug Fixes

Fix false positives in ValidDocsRule.
JP Simard #267

0.5.2: Snuggle™

Breaking

None.

Enhancements

Performance improvements & unicode fixes (via SourceKitten).
Norio Nomura

Bug Fixes

Fix ValidDocsRule false positive when documenting functions with closure parameters.
diogoguimaraes #267

0.5.1: Lint Tray Malfunction

Breaking

None.

Enhancements

None.

Bug Fixes

Make linting faster than 0.5.0, but slower than 0.4.0
Norio Nomura #119
Re-introduce --use-script-input-files option for lint & autocorrect commands. Should also fix some issues when running SwiftLint from an Xcode build phase.
JP Simard #264

0.5.0: Downy™

Breaking

init() is no longer a member of the Rule protocol.

Enhancements

Add legacy constructor rule.
Marcelo Fabri #202
The VariableNameRule now allows variable names when the entire name is capitalized. This allows stylistic usage common in cases like URL and other acronyms.
Marcelo Fabri #161
Add autocorrect command to automatically correct certain violations (currently only trailing_newline, trailing_semicolon & trailing_whitespace).
JP Simard #5
Allow to exclude files from included directory with excluded.
Michal Laskowski

Bug Fixes

Statement position rule no longer triggers for non-keyword uses of catch and else.
JP Simard #237
Fix issues with multi-byte characters.
JP Simard #234

0.4.0: Wrinkle Release

Breaking

API: Rename RuleExample to RuleDescription, remove StyleViolationType and combine Rule().identifier and Rule().example into Rule.description.
JP Simard #183

Enhancements

The VariableNameRule now allows capitalized variable names when they are declared static. This allows stylistic usage common in cases like OptionSetType subclasses.
Will Fleming
Add VariableNameMaxLengthRule and VariableNameMinLengthRule parameter rules. Remove length checks on VariableNameRule.
Mickael Morier
Add trailing semicolon rule.
JP Simard
Add force try rule.
JP Simard
Support linting from Input Files provided by Run Script Phase of Xcode with --use-script-input-files.
Norio Nomura #193

Bug Fixes

All rules now print their identifiers in reports.
JP Simard #180
ControlStatementRule now detects all violations.
Mickael Morier #187
ControlStatementRule no longer triggers a violation for acceptable use of parentheses.
Mickael Morier #189
Nesting rule no longer triggers a violation for enums nested one level deep.
JP Simard #190
ColonRule now triggers a violation even if equal operator is collapse to type and value.
Mickael Morier #135
Fix an issue where logs would be printed asynchronously over each other.
JP Simard #200

0.3.0: Wrinkly Rules

Breaking

swiftlint rules now just prints a list of all available rules and their identifiers.

Enhancements

Support for Swift 2.1.
JP Simard
Added StatementPositionRule to make sure that catch, else if and else statements are on the same line as closing brace preceding them and after one space.
Alex Culeva
Added Comma Rule to ensure there is a single space after a comma.
Alex Culeva
Add rule identifier to all linter reports.
zippy1978
Add OpeningBraceRule to make sure there is exactly a space before opening brace and it is on the same line as declaration.
Alex Culeva
Print to stderr for all informational logs. Only reporter outputs is logged to stdout.
JP Simard
JSON and CSV reporters now only print at the very end of the linting process.
JP Simard
Add support for guard statements to ControlStatementRule.
David Potter
Lint parameter variables.
JP Simard

Bug Fixes

Custom reporters are now supported even when not running with --use-stdin.
JP Simard #151
Deduplicate files in the current directory.
JP Simard #154

0.2.0: Tumble Dry

Breaking

SwiftLint now exclusively supports Swift 2.0.
JP Simard #77
ViolationSeverity now has an associated type of String and two members: .Warning and .Error.
JP Simard #113

Enhancements

Configure SwiftLint via a YAML file: Supports disabled_rules, included, excluded and passing parameters to parameterized rules. Pass a configuration file path to --config, defaults to .swiftlint.yml.
JP Simard #1 #3 #20 #26
Updated TypeNameRule and VariableNameRule to allow private type & variable names to start with an underscore.
JP Simard
Disable and re-enable rules from within source code comments using // swiftlint:disable $IDENTIFIER and // swiftlint:enable $IDENTIFIER.
JP Simard #4
Add --strict lint flag which makes the lint fail if there are any warnings.
Keith Smiley
Violations are now printed to stderr.
Keith Smiley
Custom reporters are now supported. Specify a value for the reporter: key in your configuration file. Available reporters are xcode (default), json, csv.
JP Simard #42

Bug Fixes

Improve performance of TrailingWhitespaceRule.
Keith Smiley
Allow newlines in function return arrow.
JP Simard

0.1.2: FabricSoftenerRule

Breaking

None.

Enhancements

Added OperatorFunctionWhitespaceRule to make sure that you use whitespace around operators when defining them.
Akira Hirakawa #60
Added ReturnArrowWhitespaceRule to make sure that you have 1 space before return arrow and return type.
Akira Hirakawa
Support linting from standard input (use --use-stdin).
JP Simard #78
Improve performance of TrailingNewlineRule.
Keith Smiley
Lint parentheses around switch statements.
Keith Smiley

Bug Fixes

None.

0.1.1: Top Loading

Breaking

The Rule and ASTRule protocol members are now non-static.
aarondaub
Split Rule into Rule and ParameterizedRule protocols.
aarondaub #21

Enhancements

Added a command line option --path to specify a path to lint.
Lars Lockefeer #16
swiftlint now returns a non-zero error code when a warning of high-severity or above is found in the source files being linted.
Pat Wallace #30
Added rules command to display which rules are currently applied along with examples.
Chris Eidhof
Cache parsing to reduce execution time by more than 50%.
Nikolaj Schumacher
Added ControlStatementRule to make sure that if/for/while/do statements do not wrap their conditionals in parentheses.
Andrea Mazzini
Character position is now included in violation location where appropriate.
JP Simard #62
The following rules now conform to ASTRule: FunctionBodyLength, Nesting, TypeBodyLength, TypeName, VariableName.
JP Simard

Bug Fixes

Trailing newline and file length violations are now displayed in Xcode.
JP Simard #43

0.1.0: Fresh Out Of The Dryer

First Version!

Files

CHANGELOG.md

Latest commit

History

CHANGELOG.md

File metadata and controls

Master

Breaking

Experimental

Enhancements

Bug Fixes

0.35.0: Secondary Lint Trap

Breaking

Experimental

Enhancements

Bug Fixes

0.34.0: Anti-Static Wool Dryer Balls

Breaking

Experimental

Enhancements

Bug Fixes

0.33.1: Coin-Operated Property Wrapper

Breaking

Experimental

Enhancements

Bug Fixes

0.33.0: Worldwide Dryers Conference

Breaking

Experimental

Enhancements

Bug Fixes

0.32.0: Wash-N-Fold-N-Reduce

Breaking

Experimental

Enhancements

Bug Fixes

0.31.0: Busy Laundromat

Breaking

Experimental

Enhancements

Bug Fixes

0.30.1: Localized Stain Remover

Breaking

Experimental

Enhancements

Bug Fixes

0.30.0: A New Washer and Dryer Set

Breaking

Experimental

Enhancements

Bug Fixes

0.29.4: In-Unit Operands

Breaking

Experimental

Enhancements

Bug Fixes

0.29.3: Entangled Agitator

Breaking

Experimental

Enhancements

Bug Fixes

0.29.2: Washateria

Breaking

Experimental

Enhancements

Bug Fixes

0.29.1: There’s Always More Laundry

Breaking

Experimental

Enhancements

Bug Fixes

0.29.0: A Laundry List of Changes

Breaking

Experimental

Enhancements

Bug Fixes

0.28.2: EnviroBoost Plus

Breaking

Experimental

Enhancements