LoggingKit is a micro framework for logging based on log providers
- Define your own log providers
-
Combineready - Comes with pre-defined
OSLogProviderwhich usesos_logunder the hood
The example application is the best way to see LoggingKit in action. Open Example/LoggingDemo in Xcode and run the app.
After the application has started you should see several log messages in your Xcode console and the Console.app for the device you ran the app on.
To integrate using Apple's Swift Package Manager, add the following as a dependency to your Package.swift:
dependencies: [
.package(url: "https://github.com/alexanderwe/LoggingKit.git", from: "3.0.0")
]Alternatively navigate to your Xcode project, select Package Dependencies and click the + icon to search for LoggingKit.
Extend LogCategories to declare the categories for your app:
import LoggingKit
extension LogCategories {
var viewControllers: LogCategory { .init("viewControllers") }
var networking: LogCategory { .init("networking") }
}Register one or more log providers at app startup:
import LoggingKit
@main
struct MyApp: App {
init() {
LogService.register(logProviders: OSLogProvider())
}
var body: some Scene {
WindowGroup {
ContentView()
}
}
}import LoggingKit
LogService.debug("Hello Debug", logCategory: \.viewControllers)
LogService.verbose("Hello Verbose", logCategory: \.viewControllers)
LogService.info("Hello Info", logCategory: \.viewControllers)
LogService.warning("Hello Warning", logCategory: \.viewControllers)
LogService.error("Hello Error", logCategory: \.viewControllers)LoggingKit offers extensions on Publisher to log output and failure values inline:
import LoggingKit
// logs Self.Output
myPublisher.logValue(logType: .info, logCategory: \.networking) {
"My Value is \($0)"
}
// logs Self.Failure
myPublisher.logError(logCategory: \.networking) {
"My Error is \($0)"
}
// logs both Self.Output and Self.Failure
myPublisher.log()Conform to LogProvider to route logs to any backend:
import LoggingKit
struct MyCustomProvider: LogProvider {
func log(
_ event: LogType,
_ message: @autoclosure () -> Any?,
logCategory: KeyPath<LogCategories, LogCategory>,
fileName: StaticString,
functionName: StaticString,
lineNumber: Int
) {
guard let value = message() else { return }
// Forward to your backend
print("[\(event)] \(value)")
}
}Register it alongside the built-in provider:
LogService.register(logProviders: OSLogProvider(), MyCustomProvider())LoggingKit ships with OSLogProvider, which uses os_log under the hood. Messages appear in the Console.app on your Mac and in the Xcode console.
Open Console.App, select the target device, and filter by subsystem or category to view the messages printed by OSLogProvider.
Contributions are very welcome 🙌
LoggingKit
Copyright (c) 2020 Alexander Weiß
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