Lower availability/compiler guards (#1364)

Motivation:

Concurrency support was backported to older OS versions in Swift 5.5.2;
we should lower our availability guards accordingly.

Modifications:

- Update compiler guards and availability in GRPC
- Update generated guards

Result:

Async gRPC is availabile on older OSs.

Sources/Examples/Echo/AsyncAwaitRuntime/ArgumentParser+AsyncAwait.swift

@@ -17,23 +17,23 @@
 /// NOTE: This file should be removed when the `async` branch of `swift-argument-parser` has been
 ///       released: https://github.com/apple/swift-argument-parser/tree/async
 
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 
 import ArgumentParser
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 protocol AsyncParsableCommand: ParsableCommand {
   mutating func runAsync() async throws
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension AsyncParsableCommand {
   public mutating func run() throws {
     throw CleanExit.helpRequest(self)
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension ParsableCommand {
   static func main(_ arguments: [String]? = nil) async {
     do {

Sources/Examples/Echo/AsyncAwaitRuntime/main.swift

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 
 import ArgumentParser
 import EchoImplementation
@@ -36,7 +36,7 @@ enum RPC: String, ExpressibleByArgument {
   case update
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 struct Echo: ParsableCommand {
   static var configuration = CommandConfiguration(
     abstract: "An example to run and call a simple gRPC service for echoing messages.",
@@ -115,7 +115,7 @@ struct Echo: ParsableCommand {
 
 // MARK: - Server
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func startEchoServer(group: EventLoopGroup, port: Int, useTLS: Bool) async throws {
   let builder: Server.Builder
 
@@ -157,7 +157,7 @@ func startEchoServer(group: EventLoopGroup, port: Int, useTLS: Bool) async throw
 
 // MARK: - Client
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func makeClient(
   group: EventLoopGroup,
   port: Int,
@@ -196,7 +196,7 @@ func makeClient(
   )
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func callRPC(_ rpc: RPC, using client: Echo_EchoAsyncClient, message: String) async {
   do {
     switch rpc {
@@ -214,13 +214,13 @@ func callRPC(_ rpc: RPC, using client: Echo_EchoAsyncClient, message: String) as
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func echoGet(client: Echo_EchoAsyncClient, message: String) async throws {
   let response = try await client.get(.with { $0.text = message })
   print("get received: \(response.text)")
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func echoCollect(client: Echo_EchoAsyncClient, message: String) async throws {
   let messages = message.components(separatedBy: " ").map { part in
     Echo_EchoRequest.with { $0.text = part }
@@ -229,14 +229,14 @@ func echoCollect(client: Echo_EchoAsyncClient, message: String) async throws {
   print("collect received: \(response.text)")
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func echoExpand(client: Echo_EchoAsyncClient, message: String) async throws {
   for try await response in client.expand((.with { $0.text = message })) {
     print("expand received: \(response.text)")
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func echoUpdate(client: Echo_EchoAsyncClient, message: String) async throws {
   let requests = message.components(separatedBy: " ").map { word in
     Echo_EchoRequest.with { $0.text = word }
@@ -254,7 +254,7 @@ func echoUpdate(client: Echo_EchoAsyncClient, message: String) async throws {
 import Dispatch
 let dg = DispatchGroup()
 dg.enter()
-if #available(macOS 12, iOS 15, tvOS 15, watchOS 8, *) {
+if #available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *) {
   Task {
     await Echo.main()
     dg.leave()

Sources/Examples/Echo/Implementation/EchoAsyncProvider.swift

@@ -13,11 +13,11 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 import EchoModel
 import GRPC
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 public final class EchoAsyncProvider: Echo_EchoAsyncProvider {
   public let interceptors: Echo_EchoServerInterceptorFactoryProtocol?
 
@@ -69,4 +69,4 @@ public final class EchoAsyncProvider: Echo_EchoAsyncProvider {
   }
 }
 
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)

Sources/Examples/Echo/Model/echo.grpc.swift

@@ -157,8 +157,8 @@ public final class Echo_EchoClient: Echo_EchoClientProtocol {
   }
 }
 
-#if compiler(>=5.5) && canImport(_Concurrency)
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 public protocol Echo_EchoAsyncClientProtocol: GRPCClient {
   static var serviceDescriptor: GRPCServiceDescriptor { get }
   var interceptors: Echo_EchoClientInterceptorFactoryProtocol? { get }
@@ -182,7 +182,7 @@ public protocol Echo_EchoAsyncClientProtocol: GRPCClient {
   ) -> GRPCAsyncBidirectionalStreamingCall<Echo_EchoRequest, Echo_EchoResponse>
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension Echo_EchoAsyncClientProtocol {
   public static var serviceDescriptor: GRPCServiceDescriptor {
     return Echo_EchoClientMetadata.serviceDescriptor
@@ -237,7 +237,7 @@ extension Echo_EchoAsyncClientProtocol {
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension Echo_EchoAsyncClientProtocol {
   public func get(
     _ request: Echo_EchoRequest,
@@ -312,7 +312,7 @@ extension Echo_EchoAsyncClientProtocol {
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 public struct Echo_EchoAsyncClient: Echo_EchoAsyncClientProtocol {
   public var channel: GRPCChannel
   public var defaultCallOptions: CallOptions
@@ -329,7 +329,7 @@ public struct Echo_EchoAsyncClient: Echo_EchoAsyncClientProtocol {
   }
 }
 
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)
 
 public protocol Echo_EchoClientInterceptorFactoryProtocol {
 
@@ -573,10 +573,10 @@ extension Echo_EchoProvider {
     }
   }
 }
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 
 /// To implement a server, implement an object which conforms to this protocol.
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 public protocol Echo_EchoAsyncProvider: CallHandlerProvider {
   static var serviceDescriptor: GRPCServiceDescriptor { get }
   var interceptors: Echo_EchoServerInterceptorFactoryProtocol? { get }
@@ -608,7 +608,7 @@ public protocol Echo_EchoAsyncProvider: CallHandlerProvider {
   ) async throws
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension Echo_EchoAsyncProvider {
   public static var serviceDescriptor: GRPCServiceDescriptor {
     return Echo_EchoServerMetadata.serviceDescriptor
@@ -669,7 +669,7 @@ extension Echo_EchoAsyncProvider {
   }
 }
 
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)
 
 public protocol Echo_EchoServerInterceptorFactoryProtocol {
 

Sources/Examples/RouteGuide/Client/main.swift

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 import ArgumentParser
 import Foundation
 import GRPC
@@ -33,7 +33,7 @@ func loadFeatures() throws -> [Routeguide_Feature] {
 }
 
 /// Makes a `RouteGuide` client for a service hosted on "localhost" and listening on the given port.
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 func makeClient(port: Int, group: EventLoopGroup) throws -> Routeguide_RouteGuideAsyncClient {
   let channel = try GRPCChannelPool.with(
     target: .host("localhost", port: port),
@@ -44,7 +44,7 @@ func makeClient(port: Int, group: EventLoopGroup) throws -> Routeguide_RouteGuid
   return Routeguide_RouteGuideAsyncClient(channel: channel)
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 internal struct RouteGuideExample: @unchecked Sendable {
   private let routeGuide: Routeguide_RouteGuideAsyncClient
   private let features: [Routeguide_Feature]
@@ -88,7 +88,7 @@ internal struct RouteGuideExample: @unchecked Sendable {
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension RouteGuideExample {
   /// Get the feature at the given latitude and longitude, if one exists.
   private func getFeature(latitude: Int, longitude: Int) async {
@@ -229,7 +229,7 @@ extension RouteGuideExample {
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 struct RouteGuide: ParsableCommand {
   @Option(help: "The port to connect to")
   var port: Int = 1234
@@ -274,4 +274,4 @@ if #available(macOS 12, *) {
 }
 #else
 fatalError("The RouteGuide example requires Swift concurrency features.")
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)

Sources/Examples/RouteGuide/Model/route_guide.grpc.swift

@@ -175,9 +175,9 @@ public final class Routeguide_RouteGuideClient: Routeguide_RouteGuideClientProto
   }
 }
 
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 /// Interface exported by the server.
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 public protocol Routeguide_RouteGuideAsyncClientProtocol: GRPCClient {
   static var serviceDescriptor: GRPCServiceDescriptor { get }
   var interceptors: Routeguide_RouteGuideClientInterceptorFactoryProtocol? { get }
@@ -201,7 +201,7 @@ public protocol Routeguide_RouteGuideAsyncClientProtocol: GRPCClient {
   ) -> GRPCAsyncBidirectionalStreamingCall<Routeguide_RouteNote, Routeguide_RouteNote>
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension Routeguide_RouteGuideAsyncClientProtocol {
   public static var serviceDescriptor: GRPCServiceDescriptor {
     return Routeguide_RouteGuideClientMetadata.serviceDescriptor
@@ -256,7 +256,7 @@ extension Routeguide_RouteGuideAsyncClientProtocol {
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension Routeguide_RouteGuideAsyncClientProtocol {
   public func getFeature(
     _ request: Routeguide_Point,
@@ -331,7 +331,7 @@ extension Routeguide_RouteGuideAsyncClientProtocol {
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 public struct Routeguide_RouteGuideAsyncClient: Routeguide_RouteGuideAsyncClientProtocol {
   public var channel: GRPCChannel
   public var defaultCallOptions: CallOptions
@@ -348,7 +348,7 @@ public struct Routeguide_RouteGuideAsyncClient: Routeguide_RouteGuideAsyncClient
   }
 }
 
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)
 
 public protocol Routeguide_RouteGuideClientInterceptorFactoryProtocol {
 
@@ -492,12 +492,12 @@ extension Routeguide_RouteGuideProvider {
     }
   }
 }
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 
 /// Interface exported by the server.
 ///
 /// To implement a server, implement an object which conforms to this protocol.
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 public protocol Routeguide_RouteGuideAsyncProvider: CallHandlerProvider {
   static var serviceDescriptor: GRPCServiceDescriptor { get }
   var interceptors: Routeguide_RouteGuideServerInterceptorFactoryProtocol? { get }
@@ -545,7 +545,7 @@ public protocol Routeguide_RouteGuideAsyncProvider: CallHandlerProvider {
   ) async throws
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 extension Routeguide_RouteGuideAsyncProvider {
   public static var serviceDescriptor: GRPCServiceDescriptor {
     return Routeguide_RouteGuideServerMetadata.serviceDescriptor
@@ -606,7 +606,7 @@ extension Routeguide_RouteGuideAsyncProvider {
   }
 }
 
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)
 
 public protocol Routeguide_RouteGuideServerInterceptorFactoryProtocol {
 

Sources/Examples/RouteGuide/Server/RouteGuideProvider.swift

@@ -19,9 +19,9 @@ import NIOConcurrencyHelpers
 import NIOCore
 import RouteGuideModel
 
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 internal final class RouteGuideProvider: Routeguide_RouteGuideAsyncProvider {
   private let features: [Routeguide_Feature]
   private let notes: Notes
@@ -111,7 +111,7 @@ internal final class RouteGuideProvider: Routeguide_RouteGuideAsyncProvider {
   }
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 internal final actor Notes {
   private var recordedNotes: [Routeguide_Point: [Routeguide_RouteNote]]
 
@@ -130,7 +130,7 @@ internal final actor Notes {
   }
 }
 
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)
 
 private func degreesToRadians(_ degrees: Double) -> Double {
   return degrees * .pi / 180.0

Sources/Examples/RouteGuide/Server/main.swift

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#if compiler(>=5.5) && canImport(_Concurrency)
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 import ArgumentParser
 import struct Foundation.Data
 import struct Foundation.URL
@@ -33,7 +33,7 @@ func loadFeatures() throws -> [Routeguide_Feature] {
   return try Routeguide_Feature.array(fromJSONUTF8Data: data)
 }
 
-@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
+@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
 struct RouteGuide: ParsableCommand {
   @Option(help: "The port to listen on for new connections")
   var port = 1234
@@ -76,4 +76,4 @@ if #available(macOS 12, *) {
 }
 #else
 fatalError("The RouteGuide example requires Swift concurrency support.")
-#endif // compiler(>=5.5) && canImport(_Concurrency)
+#endif // compiler(>=5.5.2) && canImport(_Concurrency)