Breaking

• The deprecated --path and --in-process-sourcekit arguments have now been removed completely.
  Martin Redington SimplyDanny #5614

• When SwiftLint corrects violations automatically (swiftlint lint --fix) it doesn't report the exact location of the fix any longer. The new format is <file-path>: Correcting <rule-name> without line and column numbers. Reason: Correction positions are likely just incorrect, especially when multiple rules apply their rewrites. Fixing that is not trivial and likely not worth the effort also considering that there haven't been any bug reports about wrong correction positions so far.
  SimplyDanny

Experimental

• None.

Enhancements

• Linting got up to 30% faster due to the praisworthy performance improvements done in the SwiftSyntax library.

• Rewrite the following rules with SwiftSyntax:

  • missing_docs

  woxtu
  SimplyDanny

• Add new prefer_key_path rule that triggers when a trailing closure on a standard function call is only hosting a (chained) member access expression since the closure can be replaced with a key path argument. Likewise, it triggers on closure arguments.
  SimplyDanny

• Adds baseline and write_baseline configuration file settings, equivalent to the --baseline and --write-baseline command line options.
  Martin Redington #5552

• Add no_empty_block opt-in rule to validate that code blocks are not empty. They should at least contain a comment.
  Ueeek #5615

• Add new contrasted_opening_brace rule that enforces opening braces to be on a separate line after the preceding declaration.
  SimplyDanny

• Add new unused_parameter rule that triggers on function/initializer/subscript parameters that are not used inside of the function/initializer/subscript.
  SimplyDanny #2120

• Support --target paths being passed to command plugin by Xcode.
  SimplyDanny #5603

• Add modified configurations to examples in rule documentation.
  SimplyDanny

• Add new option evaluate_effective_access_control_level to missing_docs rule. Setting it to true stops the rule from triggering on declarations inside of types with lower visibility. These declarations effectively have at most the same access level.
  SimplyDanny

• Add new --check-for-updates command line option for the lint, analyze, and version subcommands to check for new versions of SwiftLint, and an equivalent check_for_updates configuration file setting.
  Martin Redington SimplyDanny Ian Leitch #5613

• Add new --only-rule command line option for the lint and analyze, subcommands that overrides configuration file rule enablement and disablement, in particular to facilitate running --fix for single rules without having to temporarily edit the configuration file. Martin Redington #5666

Bug Fixes

• Fix a few false positives and negatives by updating the parser to support Swift 6 with all its new language constructs.
  SimplyDanny

• Stop triggering mark rule on "mark" comments in the middle of another comment.
  SimplyDanny #5592

• Don't consider specialized imports with attributes as duplicates in duplicate_imports rule.
  SimplyDanny #5716

• Use correct types and relative paths in SARIF reporter output. Generally avoid escaping slashes in JSON output as well.
  SimplyDanny #5598 #5599

• Keep initializers with attributed parameters in unneeded_synthesized_initializer rule.
  SimplyDanny #5153

• Make vertical_whitespace_between_cases rule work for cases ending with a string literal.
  ilendemli #5612

• Ignore access level modifiers restricted to value setting in extension_access_modifier rule.
  SimplyDanny #5623

• Fix baseline compare incorrectly reporting some violations as new, and also now sorts the violations from baseline compare deterministically.
  Martin Redington #5606

• Fix rewriting for implicit_return rule when violations are nested within each other.
  Martin Redington #5660

• Fix opening_brace correction and make sure that disable commands are taken into account before applying a fix.
  swiftty SimplyDanny #5598

• Violations of the typesafe_array_init rule will now be correctly reported as such, instead of as violations of the array_init rule.
  Martin Redington #5709

Using Bazel

With bzlmod:

// Pending BCR update
bazel_dep(name = "swiftlint", version = "0.56.0", repo_name = "SwiftLint")

Without bzlmod, put this in your WORKSPACE:

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

http_archive(
    name = "build_bazel_rules_apple",
    sha256 = "9e26307516c4d5f2ad4aee90ac01eb8cd31f9b8d6ea93619fc64b3cbc81b0944",
    url = "https://github.com/bazelbuild/rules_apple/releases/download/2.2.0/rules_apple.2.2.0.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 = "40a7873d54899ace4e485317d172c19507135ae1b3683159d521cc1daa42e196",
    url = "https://github.com/realm/SwiftLint/releases/download/0.56.0/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