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