Question 1

How do I install SwiftLint on a Mac?

Accepted Answer

The easiest way is via Homebrew with `brew install swiftlint`, but you can also use Swift Package Manager, CocoaPods, or download pre-built packages from GitHub releases, depending on your project setup.

Question 2

SwiftLint vs SwiftFormat: which should I use?

Accepted Answer

SwiftLint focuses on enforcing style rules and conventions with some auto-correction, while SwiftFormat is a dedicated code formatter that rewrites code. Use SwiftLint for linting and SwiftFormat for consistent formatting, often together.

Question 3

How to disable a specific SwiftLint rule in my code?

Accepted Answer

Add comments like `// swiftlint:disable rule_name` before the code block or in the .swiftlint.yml file under `disabled_rules`. You can also use `:next` or `:previous` modifiers for line-specific control.

Question 4

Can SwiftLint run automatically in Xcode builds?

Accepted Answer

Yes, via build tool plugins or run script phases, but it requires configuration like disabling sandboxing in Xcode 15 and ensuring the SwiftLint binary is accessible in the PATH or project settings.

Question 5

How to create custom regex rules in SwiftLint?

Accepted Answer

Define them in the .swiftlint.yml under `custom_rules` with regex patterns and optional match_kinds. This allows project-specific checks without needing to build SwiftLint from source.

Question 6

Why is SwiftLint not working with my Swift package?

Accepted Answer

Ensure you're using the SwiftLintPlugins repository for plugins, as recommended in the README, and add the plugin to each target in Package.swift. Also, check that your config file is in the correct directory.

Question 7

How to integrate SwiftLint with GitHub Actions?

Accepted Answer

Use the Docker image `ghcr.io/realm/swiftlint:latest` or install via Homebrew in the workflow, then run `swiftlint` with options like `--strict` to fail on violations and output results in formats like JSON.

Swiftlint

What is Swiftlint?

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