75 lines
2.3 KiB
Swift
75 lines
2.3 KiB
Swift
import Foundation
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import os
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import Logging
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public struct LoggingOSLog: LogHandler {
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public var logLevel: Logging.Logger.Level = .info
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public var metadata: Logging.Logger.Metadata = [:]
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public var metadataProvider: Logging.Logger.MetadataProvider?
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private let oslogger: os.Logger
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public init(label: String) {
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let lastDotPosition = label.lastIndex(of: ".") ?? label.startIndex
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let frontPart = label.prefix(upTo: lastDotPosition)
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let backPart = label.suffix(from: lastDotPosition)
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guard frontPart.count > 0 else {
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let subsystem = Bundle.main.bundleIdentifier ?? "SwiftLogToOsLog"
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self.init(subsystem: subsystem, category: label)
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return
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}
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self.init(subsystem: String(frontPart), category: String(backPart))
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}
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public init(
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subsystem: String = Bundle.main.bundleIdentifier ?? "SwiftLogToOsLog",
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category: String,
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logLevel: Logging.Logger.Level = .debug
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) {
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self.oslogger = os.Logger(subsystem: subsystem, category: category)
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self.logLevel = logLevel
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}
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public init(oslog: os.Logger, logLevel: Logging.Logger.Level = .debug) {
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self.oslogger = oslog
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self.logLevel = logLevel
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}
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public func log(
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level: Logging.Logger.Level,
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message: Logging.Logger.Message,
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metadata: Logging.Logger.Metadata?,
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source: String,
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file: String,
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function: String,
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line: UInt
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) {
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let metadataCSV = Self.joinMetadata(self.metadata, self.metadataProvider?.get(), metadata)
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let messageParts = [message.description, metadataCSV]
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let message = messageParts.compactMap { $0 }.joined(separator: " -> ")
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self.oslogger.log(level: OSLogType.from(loggerLevel: level), "\(message)")
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}
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public subscript(metadataKey metadataKey: String) -> Logging.Logger.Metadata.Value? {
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get {
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return self.metadata[metadataKey]
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}
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set {
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self.metadata[metadataKey] = newValue
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}
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}
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private static func joinMetadata(_ metadataList: Logging.Logger.Metadata?...) -> String? {
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var metadataAggregator: Logging.Logger.Metadata = [:]
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for metadata in metadataList {
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guard let metadata = metadata else { continue }
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metadataAggregator.merge(metadata) { return $1 }
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}
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return Self.joinMetadata(metadataAggregator)
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}
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private static func joinMetadata(_ metadata: Logging.Logger.Metadata, with separator: String = ", ") -> String? {
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guard !metadata.isEmpty else { return nil }
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return metadata.map { "\($0) = \($1)" }.joined(separator: separator)
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}
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} |