macos: Workaround Xcode silently run the whole app in background

Changes

2 changed files (+29/-0)

• macos/plac/DataModels/ConnectionDataModel.swift
  • @@ -88,6 +88,16 @@ self.token = cancelling.token
    self.state = .failed(CancelError.cancelled) } + #if DEBUG + /// To prevent I/O in Xcode Preview environment. + init(failingWith: CancelError) { + self.serverID = "" + self.host = "" + self.port = 0 + self.state = .failed(failingWith) + } + #endif + init( serverID: String, host: String,
• macos/plac/PlacApp.swift
  • @@ -51,6 +51,25 @@ @State private var model: ConnectionDataModelWrapper =
    ConnectionDataModelWrapper(Self.storedConnection()) private static func storedConnection() -> ConnectionDataModel? { + // Xcode Previews feature compiles and *runs* whole application. + // Because Plac saves and restores from UserDefaults, the background instance + // connects to Roon Server using the saved ID/host/port/token. The worst + // part is running the app does not immediately terminate the background + // instance--so there will be two app connecting to same destination using + // same token. Roon Server drops the first connection, then the background + // instance retries, then running instance dropped, then running instance + // retries, so on... This results in endless connection loop. + // + // Below "guard" prevents that shitty "feature" from kicking in. An additional + // bonus is, Preview loading performance is much better with this guard. + #if DEBUG + if ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] + == "1" + { + return ConnectionDataModel(failingWith: .cancelled) + } + #endif + let port = UserDefaults.standard.integer(forKey: StorageKeys.serverPort) guard