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swift-log is the official, vendor-neutral logging API for Swift, providing a small, performant core that libraries and applications adopt to avoid logger lock-in. It defines common logging semantics and levels, plus a lightweight façade that backends can implement—so the same application code can run with different logging engines (e.g., OSLog on Apple platforms or custom sinks on servers). The package embraces Swift Package Manager, offers a clean Logger API, and is widely used across the Swift on server and Apple-platform ecosystems. The repo’s release notes and ecosystem links show active maintenance, CI coverage for recent Swift versions, and community-supplied backends. By decoupling the API from any one implementation, swift-log simplifies composition: frameworks can log consistently without dictating the logging stack to end users. It’s a foundational building block for production Swift services, tools, and apps looking for consistent, structured telemetry.
Features
- Unified logging API with leveled semantics for Swift
- Pluggable backends (e.g., OSLog, file, remote collectors)
- Small, performant core designed for server and app use
- SwiftPM integration and ergonomic Logger type
- Active maintenance with CI for modern Swift toolchains
- Ecosystem of community backends and formatters
Project Samples
