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SwiftLint

A tool to enforce Swift style and conventions, loosely based on GitHub's Swift Style Guide.

SwiftLint hooks into Clang and SourceKit to use the AST representation of your source files for more accurate results.

Build Status codecov.io

This project adheres to the Contributor Covenant Code of Conduct. By participating, you are expected to uphold this code. Please report unacceptable behavior to info@realm.io.

Language Switch: 中文, 한국어.

Installation

Using Homebrew:

brew install swiftlint

Using CocoaPods:

Simply add the following line to your Podfile:

pod 'SwiftLint'

This will download the SwiftLint binaries and dependencies in Pods/ during your next pod install execution and will allow you to invoke it via ${PODS_ROOT}/SwiftLint/swiftlint in your Script Build Phases.

This is the recommended way to install a specific version of SwiftLint since it supports installing a pinned version rather than simply the latest (which is the case with Homebrew).

Note that this will add the SwiftLint binaries, its dependencies' binaries and the Swift binary library distribution to the Pods/ directory, so checking in this directory to SCM such as git is discouraged.

Using Mint:

$ mint install realm/SwiftLint

Using a pre-built package:

You can also install SwiftLint by downloading SwiftLint.pkg from the latest GitHub release and running it.

Compiling from source:

You can also build from source by cloning this project and running git submodule update --init --recursive; make install (Xcode 10.2 or later).

Known Installation Issues On MacOS Before 10.14.4

Starting with SwiftLint 0.32.0, if you get an error similar to dyld: Symbol not found: _$s11SubSequenceSlTl when running SwiftLint, you'll need to install the Swift 5 Runtime Support for Command Line Tools.

Alternatively, you can:

  • Update to macOS 10.14.4 or later
  • Install Xcode 10.2 or later at /Applications/Xcode.app
  • Rebuild SwiftLint from source using Xcode 10.2 or later

Usage

Presentation

To get a high-level overview of recommended ways to integrate SwiftLint into your project, we encourage you to watch this presentation or read the transcript:

Presentation

Xcode

Integrate SwiftLint into an Xcode scheme to get warnings and errors displayed in the IDE. Just add a new "Run Script Phase" with:

if which swiftlint >/dev/null; then
  swiftlint
else
  echo "warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint"
fi

Alternatively, if you've installed SwiftLint via CocoaPods the script should look like this:

"${PODS_ROOT}/SwiftLint/swiftlint"

Format on Save Xcode Plugin

To run swiftlint autocorrect on save in Xcode, install the SwiftLintXcode plugin from Alcatraz.

⚠️This plugin will not work with Xcode 8 or later without disabling SIP. This is not recommended.

AppCode

To integrate SwiftLint with AppCode, install this plugin and configure SwiftLint's installed path in the plugin's preferences. The autocorrect action is available via ⌥⏎.

Atom

To integrate SwiftLint with Atom, install the linter-swiftlint package from APM.

fastlane

You can use the official swiftlint fastlane action to run SwiftLint as part of your fastlane process.

swiftlint(
    mode: :lint,                            # SwiftLint mode: :lint (default) or :autocorrect
    executable: "Pods/SwiftLint/swiftlint", # The SwiftLint binary path (optional). Important if you've installed it via CocoaPods
    path: "/path/to/lint",                  # Specify path to lint (optional)
    output_file: "swiftlint.result.json",   # The path of the output file (optional)
    reporter: "json",                       # The custom reporter to use (optional)
    config_file: ".swiftlint-ci.yml",       # The path of the configuration file (optional)
    files: [                                # List of files to process (optional)
        "AppDelegate.swift",
        "path/to/project/Model.swift"
    ],
    ignore_exit_status: true,               # Allow fastlane to continue even if SwiftLint returns a non-zero exit status (Default: false)
    quiet: true,                            # Don't print status logs like 'Linting ' & 'Done linting' (Default: false)
    strict: true                            # Fail on warnings? (Default: false)
)

Command Line

$ swiftlint help
Available commands:

   analyze         [Experimental] Run analysis rules
   autocorrect     Automatically correct warnings and errors
   generate-docs   Generates markdown documentation for all rules
   help            Display general or command-specific help
   lint            Print lint warnings and errors (default command)
   rules           Display the list of rules and their identifiers
   version         Display the current version of SwiftLint

Run swiftlint in the directory containing the Swift files to lint. Directories will be searched recursively.

To specify a list of files when using lint, autocorrect or analyze (like the list of files modified by Xcode specified by the ExtraBuildPhase Xcode plugin, or modified files in the working tree based on git ls-files -m), you can do so by passing the option --use-script-input-files and setting the following instance variables: SCRIPT_INPUT_FILE_COUNT and SCRIPT_INPUT_FILE_0, SCRIPT_INPUT_FILE_1...SCRIPT_INPUT_FILE_{SCRIPT_INPUT_FILE_COUNT}.

These are same environment variables set for input files to custom Xcode script phases.

Working With Multiple Swift Versions

SwiftLint hooks into SourceKit so it continues working even as Swift evolves!

This also keeps SwiftLint lean, as it doesn't need to ship with a full Swift compiler, it just communicates with the official one you already have installed on your machine.

You should always run SwiftLint with the same toolchain you use to compile your code.

You may want to override SwiftLint's default Swift toolchain if you have multiple toolchains or Xcodes installed.

Here's the order in which SwiftLint determines which Swift toolchain to use:

  • $XCODE_DEFAULT_TOOLCHAIN_OVERRIDE
  • $TOOLCHAIN_DIR or $TOOLCHAINS
  • xcrun -find swift
  • /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
  • /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
  • ~/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
  • ~/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain

sourcekitd.framework is expected to be found in the usr/lib/ subdirectory of the value passed in the paths above.

You may also set the TOOLCHAINS environment variable to the reverse-DNS notation that identifies a Swift toolchain version:

$ TOOLCHAINS=com.apple.dt.toolchain.Swift_2_3 swiftlint autocorrect

On Linux, SourceKit is expected to be located in /usr/lib/libsourcekitdInProc.so or specified by the LINUX_SOURCEKIT_LIB_PATH environment variable.

Swift Version Support

Here's a reference of which SwiftLint version to use for a given Swift version.

| Swift version | Last supported SwiftLint release | |:----------------|:---------------------------------| | Swift 1.x | SwiftLint 0.1.2 | | Swift 2.x | SwiftLint 0.18.1 | | Swift 3.x | SwiftLint 0.25.1 | | Swift 4.0-4.1.x | SwiftLint 0.28.2 | | Swift 4.2.x | SwiftLint 0.35.0 | | Swift 5.x | Latest |

Rules

Over 75 rules are included in SwiftLint and the Swift community (that's you!) continues to contribute more over time. Pull requests are encouraged.

You can find an updated list of rules and more information about them here.

You can also check Source/SwiftLintFramework/Rules directory to see their implementation.

Opt-In Rules

opt_in_rules are disabled by default (i.e., you have to explicitly enable them in your configuration file).

Guidelines on when to mark a rule as opt-in:

  • A rule that can have many false positives (e.g. empty_count)
  • A rule that is too slow
  • A rule that is not general consensus or is only useful in some cases (e.g. force_unwrapping)

Disable rules in code

Rules can be disabled with a comment inside a source file with the following format:

// swiftlint:disable <rule1> [<rule2> <rule3>...]

The rules will be disabled until the end of the file or until the linter sees a matching enable comment:

// swiftlint:enable <rule1> [<rule2> <rule3>...]

For example:

// swiftlint:disable colon
let noWarning :String = "" // No warning about colons immediately after variable names!
// swiftlint:enable colon
let hasWarning :String = "" // Warning generated about colons immediately after variable names

Including the all keyword will disable all rules until the linter sees a matching enable comment:

// swiftlint:disable all // swiftlint:enable all

For example:

// swiftlint:disable all
let noWarning :String = "" // No warning about colons immediately after variable names!
let i = "" // Also no warning about short identifier names
// swiftlint:enable all
let hasWarning :String = "" // Warning generated about colons immediately after variable names
let y = "" // Warning generated about short identifier names

It's also possible to modify a disable or enable command by appending :previous, :this or :next for only applying the command to the previous, this (current) or next line respectively.

For example:

// swiftlint:disable:next force_cast
let noWarning = NSNumber() as! Int
let hasWarning = NSNumber() as! Int
let noWarning2 = NSNumber() as! Int // swiftlint:disable:this force_cast
let noWarning3 = NSNumber() as! Int
// swiftlint:disable:previous force_cast

Run swiftlint rules to print a list of all available rules and their identifiers.

Configuration

Configure SwiftLint by adding a .swiftlint.yml file from the directory you'll run SwiftLint from. The following parameters can be configured:

Rule inclusion:

  • disabled_rules: Disable rules from the default enabled set.
  • opt_in_rules: Enable rules not from the default set.
  • whitelist_rules: Acts as a whitelist, only the rules specified in this list will be enabled. Can not be specified alongside disabled_rules or opt_in_rules.
  • analyzer_rules: This is an entirely separate list of rules that are only run by the analyze command. All analyzer rules are opt-in, so this is the only configurable rule list (there is no disabled/whitelist equivalent).
disabled_rules: # rule identifiers to exclude from running
  - colon
  - comma
  - control_statement
opt_in_rules: # some rules are only opt-in
  - empty_count
  # Find all the available rules by running:
  # swiftlint rules
included: # paths to include during linting. `--path` is ignored if present.
  - Source
excluded: # paths to ignore during linting. Takes precedence over `included`.
  - Carthage
  - Pods
  - Source/ExcludedFolder
  - Source/ExcludedFile.swift
  - Source/*/ExcludedFile.swift # Exclude files with a wildcard
analyzer_rules: # Rules run by `swiftlint analyze` (experimental)
  - explicit_self

# configurable rules can be customized from this configuration file
# binary rules can set their severity level
force_cast: warning # implicitly
force_try:
  severity: warning # explicitly
# rules that have both warning and error levels, can set just the warning level
# implicitly
line_length: 110
# they can set both implicitly with an array
type_body_length:
  - 300 # warning
  - 400 # error
# or they can set both explicitly
file_length:
  warning: 500
  error: 1200
# naming rules can set warnings/errors for min_length and max_length
# additionally they can set excluded names
type_name:
  min_length: 4 # only warning
  max_length: # warning and error
    warning: 40
    error: 50
  excluded: iPhone # excluded via string
  allowed_symbols: ["_"] # these are allowed in type names
identifier_name:
  min_length: # only min_length
    error: 4 # only error
  excluded: # excluded via string array
    - id
    - URL
    - GlobalAPIKey
reporter: "xcode" # reporter type (xcode, json, csv, checkstyle, junit, html, emoji, sonarqube, markdown)

You can also use environment variables in your configuration file, by using ${SOME_VARIABLE} in a string.

Defining Custom Rules

You can define custom regex-based rules in your configuration file using the following syntax:

custom_rules:
  pirates_beat_ninjas: # rule identifier
    included: ".*\\.swift" # regex that defines paths to include during linting. optional.
    excluded: ".*Test\\.swift" # regex that defines paths to exclude during linting. optional
    name: "Pirates Beat Ninjas" # rule name. optional.
    regex: "([n,N]inja)" # matching pattern
    capture_group: 0 # number of regex capture group to highlight the rule violation at. optional.
    match_kinds: # SyntaxKinds to match. optional.
      - comment
      - identifier
    message: "Pirates are better than ninjas." # violation message. optional.
    severity: error # violation severity. optional.
  no_hiding_in_strings:
    regex: "([n,N]inja)"
    match_kinds: string

This is what the output would look like:

You can filter the matches by providing one or more match_kinds, which will reject matches that include syntax kinds that are not present in this list. Here are all the possible syntax kinds:

  • argument
  • attribute.builtin
  • attribute.id
  • buildconfig.id
  • buildconfig.keyword
  • comment
  • comment.mark
  • comment.url
  • doccomment
  • doccomment.field
  • identifier
  • keyword
  • number
  • objectliteral
  • parameter
  • placeholder
  • string
  • string_interpolation_anchor
  • typeidentifier

If using custom rules alongside a whitelist, make sure to add custom_rules as an item under whitelist_rules.

Nested Configurations

SwiftLint supports nesting configuration files for more granular control over the linting process.

  • Include additional .swiftlint.yml files where necessary in your directory structure.
  • Each file will be linted using the configuration file that is in its directory or at the deepest level of its parent directories. Otherwise the root configuration will be used.
  • included is ignored for nested configurations.

Auto-correct

SwiftLint can automatically correct certain violations. Files on disk are overwritten with a corrected version.

Please make sure to have backups of these files before running swiftlint autocorrect, otherwise important data may be lost.

Standard linting is disabled while correcting because of the high likelihood of violations (or their offsets) being incorrect after modifying a file while applying corrections.

Analyze (experimental)

The experimental swiftlint analyze command can lint Swift files using the full type-checked AST. 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

This can be obtained by running xcodebuild -workspace {WORKSPACE}.xcworkspace -scheme {SCHEME} > xcodebuild.log with a clean DerivedData folder.

This command and related code in SwiftLint is subject to substantial changes at any time while this feature is marked as experimental. Analyzer rules also tend to be considerably slower than lint rules.

License

MIT licensed.

About

SwiftLint is maintained and funded by Realm Inc. The names and logos for Realm are trademarks of Realm Inc.

We :heart: open source software! See our other open source projects, read our blog, or say hi on twitter (@realm).

Our thanks to MacStadium for providing a Mac Mini to run our performance tests.

Github

link
Stars: 12926

Used By

Total: 0

Releases

0.38.2: Machine Repair Manual - 2020-01-08 18:35:55

Breaking

  • None.

Experimental

  • None.

Enhancements

  • Add option to configure which kinds of expressions should omit their return keyword by introducing an included configuration for the implicit_return rule. Supported values are closure, function and getter. Defaults to all three.
    Sven Münnich #2870

  • Add --correctable and --verbose arguments to the rules command to allow displaying only correctable rules, and to always print the full configuration details regardless of your terminal width.
    Optional Endeavors

  • Add capture_group option to custom_rules for more fine-grained placement of the location marker for violating code.
    pyrtsa

  • Add orphaned_doc_comment rule to catch doc comments that are not attached to any declarations.
    Marcelo Fabri #2989

  • Add new indentation opt-in rule (indentation_width) checking for super-basic additive indentation pattern.
    Frederick Pietschmann #227

  • Catch previously missed violations in the optional_enum_case_matching rule when case expressions involved tuples.
    JP Simard

  • API docs for SwiftLintFramework are now available at realm.github.io/SwiftLint. Rules.md now redirects to the rules directory in the API docs here. Contributors no longer need to update rule documentation in PRs as this is now done automatically. The rule documentation now includes the default configuration.
    JP Simard #1653 #1704 #2808 #2933 #2961

Bug Fixes

  • Fix issues in unused_import rule when correcting violations in files containing @testable imports where more than the unused imports would be removed.
    JP Simard

0.38.1: Extra Shiny Pulsator Cap - 2020-01-04 03:45:06

Breaking

  • None.

Experimental

  • None.

Enhancements

  • Make weak_delegate rule correctable.
    MaxHaertwig

  • Allow SubstitutionCorrectableRule to return nil instead of a correction to indicate that a suitable correction couldn't be found for a specific case.
    MaxHaertwig

  • Add enum_case_associated_value_count opt-in rule.
    lakpa #2997

  • Add optional_enum_case_matching opt-in rule to validate that optional enum cases are matched without using ? when using Swift 5.1 or above. See SR-7799 for more details.
    Marcelo Fabri

  • Add prefer_self_type_over_type_of_self opt-in rule to enforce using Self instead of type(of: self) when using Swift 5.1 or above.
    Marcelo Fabri #3003

Bug Fixes

  • Fix crash in unused_import rule when unused imports have trailing comments.
    JP Simard #2990

  • Handle @_exported imports in unused_import rule.
    JP Simard #2877

  • Fix false positives from the unused_declaration rule involving functions in protocol extensions.
    JP Simard

  • Fix parsing of SwiftLint commands containing a URL in their trailing comment.
    Sven Münnich

  • Added missing parameters to FileNameConfiguration.consoleDescription.
    timcmiller #3009

  • Fix crash when SourceKit returns out of bounds string byte offsets.
    JP Simard

0.38.0: Toroidal Agitation - 2019-12-03 18:51:55

Breaking

  • Replace the SyntaxToken and SyntaxMap structures used in public SwiftLintFramework APIs with a new SwiftLintSyntaxToken and SwiftlintSyntaxMap wrappers over structures returned from SourceKitten.
    PaulTaykalo #2955

Experimental

  • None.

Enhancements

  • Make control_statement rule correctable.
    MaxHaertwig

  • Add expiring_todo opt-in rule to allow developers to mark their todos with an expiration date.
    Dan Loman #727

  • Support compilation databases for swiftlint analayze.
    kastiglione #2962

Bug Fixes

0.37.0: Double Load - 2019-11-09 22:32:47

Breaking

  • Replace the [String: SourceKittenRepresentable] dictionaries used in public SwiftLintFramework APIs with a new SourceKittenDictionary wrapper over dictionaries returned from SourceKitten.
    PaulTaykalo #2922

  • Update Commandant dependency to version 0.17.0, removing the antitypical/Result dependency in favor of the Swift standard library's Result type.
    JP Simard

Experimental

  • None.

Enhancements

  • Speed up many operations by using SwiftLintFile wrapper over File from SourceKitten, caching most members derived from the File.
    PaulTaykalo #2929

  • Speed up Swiftlint by using swift enums instead of raw values for dictionary lookups.
    PaulTaykalo #2924

  • Speed up Identical Operands rule by using syntaxmap instead of regular expressions.
    PaulTaykalo #2918

  • Speed up syntax token lookups, which can improve performance when linting large files.
    PaulTaykalo
    #2916

  • Use faster comparison in 'file_types_order' rule.
    PaulTaykalo #2949

  • Speed up recursively executed rules (all AST rules and some others) by avoiding the creation of many intermediate collections when accumulating results.
    PaulTaykalo #2951

  • Add GitHub Actions Logging reporter (github-actions-logging).
    Norio Nomura

Bug Fixes

  • None.

0.36.0: 👕👚👗 - 2019-10-24 22:26:25

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

  • Add autocorrection to syntactic_sugar.
    Ivan Vavilov

  • Make toggle_bool rule substitution correctable.
    MaxHaertwig

  • Optimize the performance of redundant_void_return rule.
    Marcelo Fabri

  • Support building with Swift 5.1 on Linux.
    Marcelo Fabri #2874

  • Add raw_value_for_camel_cased_codable_enum opt-in rule to enforce raw values for camel cased Codable String enum cases.
    Marko Pejovic #2888

  • Speedup LetVarWhiteSpacesRule.
    PaulTaykalo #2901

Bug Fixes

  • Fix running analyzer rules on the output of builds performed with Xcode 11 or later.
    JP Simard

0.35.0: Secondary Lint Trap - 2019-09-03 14:08:28

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

0.34.0: Anti-Static Wool Dryer Balls - 2019-07-19 01:37:56

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 - 2019-07-08 15:56:15

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 - 2019-06-02 17:08:09

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 - 2019-04-29 04:44:27

This release has improved support for building and running SwiftLint using Swift 5, adds seven new (super useful) rules and fixes a number of false positives or missing violations.

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 - 2019-02-28 23:16:19

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 - 2019-01-23 19:13:48

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 - 2019-01-18 07:36:24

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 - 2019-01-16 22:30:25

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 - 2019-01-08 00:31:44

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 - 2018-12-24 04:33:07

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 - 2018-11-29 22:29:46

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 - 2018-11-27 21:32:17

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 - 2018-11-24 19:31:44

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 - 2018-11-18 23:42:49

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 - 2018-11-14 06:48:12

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 - 2018-07-31 16:45:07

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 - 2018-06-22 16:52:33

Breaking

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 convenience_type opt-in rule to validate that types hosting only static members should be enums to avoid instantiation.
    Marcelo Fabri #1871

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 - 2018-04-08 18:14:36

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 - 2018-02-12 06:23:08

Breaking

  • None.

Enhancements

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 - 2018-01-10 18:15:28

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
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

0.24.1: Dented Tumbler - 2018-01-08 23:22:42

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 - 2017-11-10 23:51:16

Breaking
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 - 2017-10-10 16:56:09

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 - 2017-10-04 01:21:15

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