XCGLogger のログ送り先を Crashlytics にする

log.swift

// SEE ALSO: https://github.com/DaveWoodCom/XCGLogger/pull/78#issuecomment-256779363
open class CrashlyticsLogDestination: BaseDestination {

    public override init(owner: XCGLogger?, identifier: String = "\(XCGLogger.Constants.baseIdentifier).logdestination.crashlytics") {
        super.init(owner: owner, identifier: identifier)
        showDate = false
    }

    open override func output(logDetails: LogDetails, message: String) {
        let args: [CVarArg] = [message]
        withVaList(args) { (argp: CVaListPointer) in
            CLSLogv("%@", argp)
        }
    }
}

let log: XCGLogger = {
    let log = XCGLogger(identifier: "com.example.foo.logger", includeDefaultDestinations: false)

    #if DEBUG
    let destination = ConsoleDestination(identifier: XCGLogger.Constants.baseConsoleDestinationIdentifier)
    destination.outputLevel = .debug
    destination.showLogIdentifier = false
    destination.showFunctionName = true
    destination.showThreadName = true
    destination.showLevel = true
    destination.showFileName = true
    destination.showLineNumber = true
    destination.showDate = false
    destination.formatters = {
        let emojiLogFormatter = PrePostFixLogFormatter()
        emojiLogFormatter.apply(prefix: "🗯🗯🗯 ", postfix: " 🗯🗯🗯", to: .verbose)
        emojiLogFormatter.apply(prefix: "🔹🔹🔹 ", postfix: " 🔹🔹🔹", to: .debug)
        emojiLogFormatter.apply(prefix: "ℹ️ℹ️ℹ️ ", postfix: " ℹ️ℹ️ℹ️", to: .info)
        emojiLogFormatter.apply(prefix: "⚠️⚠️⚠️ ", postfix: " ⚠️⚠️⚠️", to: .warning)
        emojiLogFormatter.apply(prefix: "‼️‼️‼️ ", postfix: " ‼️‼️‼️", to: .error)
        emojiLogFormatter.apply(prefix: "💣💣💣 ", postfix: " 💣💣💣", to: .severe)
        return [emojiLogFormatter]
    }()
    log.add(destination: destination)
    #else
    let destination = CrashlyticsLogDestination(owner: log)
    destination.outputLevel = .debug
    destination.showLogIdentifier = false
    destination.showFunctionName = true
    destination.showThreadName = true
    destination.showLevel = true
    destination.showFileName = true
    destination.showLineNumber = true
    destination.showDate = false
    log.add(destination: destination)
    #endif

    return log
}()