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