OSLog
logging backend for swift-log
OSLog
Logger.Level
to OSLogType
Add dependency to Package.swift
...
.package(url: "https://github.com/Alexander-Ignition/OSLogging", from: "1.0.0"),
... and your target
.target(name: "ExampleApp", dependencies: ["OSLogging"]),
Override LoggingSystem
with default OSLog
.
LoggingSystem.bootstrap { _ in OSLogHandler() }
let logger = Logger(label: "com.example.app")
logger.info("i found you!")
// 2019-10-20 08:47:35.498086+0300 ExampleApp[6533:150683] i found you!
Сhoose subsystems and categories for different parts of the application
let logger = Logger(label: "com.exaple.app") { label in
OSLogHandler(subsystem: label, category: "auth")
}
logger.info("loose control")
// 2019-10-20 08:47:35.498582+0300 ExampleApp[6533:150683] [auth] loose control
Custom metadata format
var logger = Logger(label: "com.exaple.app") { label in
var hanlder = OSLogHandler(subsystem: label, category: "session")
hanlder.formatter = { metadata in
metadata.map { "\($0):\($1)" } .joined(separator: ", ")
}
return hanlder
}
logger[metadataKey: "request-id"] = "1"
logger[metadataKey: "session-id"] = "a"
logger.warning("catch me if you can")
// 2019-10-20 08:47:35.499106+0300 ExampleApp[6533:150683] [session] session-id:a, request-id:1 catch me now
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