Swift Language Support

Summary

Feature	Status	Notes
Maintainability	✔	Complexity, duplication, code smells
Linting	✔
Auto-formatting	✔
Custom checks	✔
Security scanning	✔	AppSec, dependencies, and secrets
Code metrics	✔
Code coverage	✔

Details

Maintainability
Complexity	✔	Aka cognitive complexity
Cyclomatic complexity	✔
Identical code duplication	✔
Similar code duplication	✔
Code smells	✔
Linters
SwiftLint*	✔	Tool to enforce Swift style and conventions.
StringsLint*	✔	Ensures localized strings are complete and not unused
Auto-formatters
SwiftFormat*	✔	CLI (and Xcode Extension) for formatting Swift code
Custom checks
Semgrep	✔
ripgrep	✔
Security scanning
Gitleaks	✔	Secrets scanning
Semgrep	✔	AppSec (SAST)
Trivy	✔	Dependency scanning (SCA) for CocoaPods and Swift package managers
TruffleHog	✔	Secrets scanning
Code coverage
slather	✔
Cobertura coverage format	✔

These plugins only run on macOS and are available via the Qlty CLI. They are not available on Qlty Cloud which runs on Linux.

File extensions

By default, Swift files are defined as:

[file_types.swift]
globs = ["*.swift"]

These patterns can be overridden from qlty.toml.

Supported Swift versions

We officially support Swift 6+ and later for maintainability checks and code coverage. Each plugin may have its own version requirements.