This is a prerelease version. It won't be published to Homebrew or CocoaPods. But there are many other ways to install:

• Downloading the attached SwiftLint.pkg installer and launching it
• Downloading the attached portable_swiftlint.zip archive, extracting it and moving the binary from portable_swiftlint/swiftlint to /usr/local/bin or elsewhere in your PATH
• Using Mint: mint install realm/SwiftLint@0.50.0-rc.1
• Cloning and building from source: git clone https://github.com/realm/SwiftLint.git && cd SwiftLint && git checkout 0.50.0-rc.1 && make install
• Docker: docker run -it -v `pwd`:`pwd` -w `pwd` ghcr.io/realm/swiftlint:0.50.0-rc.1
• Bazel: See instructions at the bottom

Changes from 0.49.1: https://github.com/realm/SwiftLint/compare/0.49.1...0.50.0-rc.1

Breaking

• SwiftLint now requires Swift 5.7 or higher to build.
  JP Simard

• Exclude weak_delegate rule from autocorrection due to behavioral changes leading to potential undefined behavior or bugs.
  SimplyDanny #3577

• The anyobject_protocol rule is now deprecated and will be completely removed in a future release because it is now handled by the Swift compiler.
  JP Simard

Experimental

• None.

Enhancements

• SwiftSyntax libraries have been updated from the previous 5.6 release and now use the new parser written in Swift. Swift 5.7+ features should now be parsed more accurately. We've also measured an improvement in lint times of up to 15%. This should also fix some deployment issues where the exact version of the internal SwiftSyntax parser needed to be available. If you notice any unexpected changes to lint results, please file an issue on the SwiftLint issue tracker. We can look into it and if it's a SwiftSyntax parser regression we can re-file it upstream.
  JP Simard #4031

• Add ability to filter rules for generate-docs subcommand.
  kattouf

• Add new excludes_trivial_init configuration for missing_docs rule to exclude initializers without any parameters.
  Marcelo Fabri #4107

• Rewrite some rules with SwiftSyntax, fixing some false positives and catching more violations:

  • anonymous_argument_in_multiline_closure
  • array_init
  • block_based_kvo
  • class_delegate_protocol
  • closing_brace
  • closure_parameter_position
  • computed_accessors_order
  • contains_over_filter_count
  • contains_over_range_nil_comparison
  • deployment_target
  • discouraged_object_literal
  • discouraged_optional_boolean
  • duplicate_enum_cases
  • dynamic_inline
  • empty_collection_literal
  • empty_enum_arguments
  • empty_parameters
  • empty_parentheses_with_trailing_closure
  • empty_string
  • explicit_init
  • fallthrough
  • flatmap_over_map_reduce
  • force_try
  • force_unwrapping
  • generic_type_name
  • ibinspectable_in_extension
  • implicit_getter
  • inert_defer
  • large_tuple
  • legacy_cggeometry_functions
  • legacy_constant
  • legacy_nsgeometry_functions
  • multiple_closures_with_trailing_closure
  • no_extension_access_modifier
  • no_fallthrough_only
  • no_space_in_method_call
  • nsobject_prefer_isequal
  • private_action
  • private_outlet
  • private_unit_test
  • protocol_property_accessors_order
  • redundant_nil_coalescing
  • redundant_string_enum_value
  • strong_iboutlet
  • switch_case_on_newline
  • toggle_bool
  • trailing_semicolon
  • unneeded_break_in_switch
  • unneeded_parentheses_in_closure_argument
  • unowned_variable_capture
  • untyped_error_in_catch
  • xctfail_message
    Marcelo Fabri SimplyDanny JP Simard #2915

• Add accessibility_trait_for_button rule to warn if a SwiftUI View has a tap gesture added to it without having the button or link accessibility trait.
  Ryan Cole

• Add methods from SE-0348 to UnusedDeclarationRule.
  JP Simard

• Include the configured bind_identifier in self_binding violation messages.
  JP Simard

• Add library_content_provider file type to file_types_order rule to allow LibraryContentProvider to be ordered independent from main_type.
  dahlborn

• Add test_parent_classes option to test_case_accessibility rule, which allows detection in subclasses of XCTestCase.
  Martin Redington #4200

• Add a new if_let_shadowing opt-in rule that triggers in Swift 5.7 when a shadowing optional binding is created in an if- or guard-statement.
  SimplyDanny #4202

• Use SwiftSyntax instead of SourceKit to determine if a file has parser errors before applying corrections. This speeds up corrections significantly when none of the rules use SourceKit.
  JP Simard

• Add Swift Package Build Tool Plugin with support for Swift Packages and Xcode projects.
  Johannes Ebeling #3679 #3840

• Make private_unit_test rule correctable.
  SimplyDanny

Bug Fixes

• Respect validates_start_with_lowercase option when linting function names.
  Chris Brakebill #2708

• Do not report variables annotated with @NSApplicationDelegateAdaptor and @WKExtensionDelegateAdaptor in weak_delegate rule.
  Till Hainbach #3598 #3611

• Fix false-positives related to the willMove lifecycle method in type_contents_order rule.
  SimplyDanny #3478

• Do no longer autocorrect usage of NSIntersectionRect in legacy_nsgeometry_functions rule.
  SimplyDanny #3703

• Fix Analyzer rules in Xcode 14.
  SimplyDanny #4208

• Add column for SourceKit usage to rules command.
  JP Simard

Using Bazel

Put this in your WORKSPACE:

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "build_bazel_rules_apple",
    sha256 = "90e3b5e8ff942be134e64a83499974203ea64797fd620eddeb71b3a8e1bff681",
    url = "https://github.com/bazelbuild/rules_apple/releases/download/1.1.2/rules_apple.1.1.2.tar.gz",
)

load(
    "@build_bazel_rules_apple//apple:repositories.bzl",
    "apple_rules_dependencies",
)

apple_rules_dependencies()

load(
    "@build_bazel_rules_swift//swift:repositories.bzl",
    "swift_rules_dependencies",
)

swift_rules_dependencies()

load(
    "@build_bazel_rules_swift//swift:extras.bzl",
    "swift_rules_extra_dependencies",
)

swift_rules_extra_dependencies()

http_archive(
    name = "SwiftLint",
    sha256 = "ee13554c48ca7845513ae307863525afbb5b8f22d4c3b34b5b2e87311c3d5e26",
    url = "https://github.com/realm/SwiftLint/releases/download/0.50.0-rc.1/bazel.tar.gz",
)

load("@SwiftLint//bazel:repos.bzl", "swiftlint_repos")

swiftlint_repos()

load("@SwiftLint//bazel:deps.bzl", "swiftlint_deps")

swiftlint_deps()

Then you can run SwiftLint in the current directory with this command:

bazel run @SwiftLint//:swiftlint -- --help