XXMessengerClient - logging

XXMessengerClient

• Add MessengerSetLogLevel function.
• Add MessengerStartLogging function.
• Implement logging with swift-log package.

xx-messenger example

• Log using swift-log package.
• Bootstrap logging system with Pulse library.
• Start logging when creating AppEnvironment.

Sources/XXMessengerClient/Messenger/Functions/MessengerStartLogging.swift

+import Foundation
+import Logging
+import XCTestDynamicOverlay
+import XXClient
+
+public struct MessengerStartLogging {
+  public var run: () -> Void
+
+  public func callAsFunction() -> Void {
+    run()
+  }
+}
+
+extension MessengerStartLogging {
+  public static func live(_ env: MessengerEnvironment) -> MessengerStartLogging {
+    return MessengerStartLogging {
+      env.registerLogWriter(.init { messageString in
+        let message = LogMessage.parse(messageString)
+        env.log(message)
+      })
+    }
+  }
+}
+
+extension MessengerStartLogging {
+  public static let unimplemented = MessengerStartLogging(
+    run: XCTUnimplemented("\(Self.self)")
+  )
+}