如何在 swift 包管理器中使目标产品平台特定

Question

我有以下通用架构。一个应用程序，它为我的所有模型数据导入一个 Swift 包，然后根据平台与 Firestore 一起使用或将 REST 定向到 firestore。我将 REST 用于 WatchOS，因为 firestore-swift 仍然不支持 WatchOS。

我的 Swift 包依赖于 Firestore，这不是问题。但是，我只希望目标部分中的目标可用于 iOS 和 MacOS，而不是包含在 WatchOS 中。我可以在包清单文件中指定吗？

这是我正在尝试做的事情的总图。

我的包裹清单如下所示。请注意底部的两条注释掉的行，只有当目标是 iOS 或 MacOS 时我才想包含它们。

// swift-tools-version:5.5
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "EMobileLibrary",
    platforms: [.iOS(.v15), .watchOS(.v8), .macOS(.v12)],
    products: [
        // Products define the executables and libraries a package produces, and make them visible to other packages.
        .library(
            name: "EMobileLibrary",
            targets: ["EMobileLibrary"]),
    ],
    dependencies: [
        // Dependencies declare other packages that this package depends on.
        .package(name: "AppDevWithSwiftLibrary", url: "https://github.com/directoryname/AppDevWithSwiftLibrary", from: "1.11.6"),
        .package(
            name: "Firebase",
            url: "https://github.com/firebase/firebase-ios-sdk.git",
            .upToNextMajor(from: "8.10.0")
          ),
    ],
    targets: [
        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
        // Targets can depend on other targets in this package, and on products in packages this package depends on.
        .target(
            name: "EMobileLibrary",
            dependencies: [
                .product(name: "AppDevWithSwiftLibrary", package: "AppDevWithSwiftLibrary"),
//                .product(name: "FirebaseFirestore", package: "Firebase"),
//                .product(name: "FirebaseFirestoreSwift-Beta", package: "Firebase")
            ]
        ),
        .testTarget(
            name: "EMobileLibraryTests",
            dependencies: ["EMobileLibrary"]),
    ]
)

Answer 1

定义一个具有平台依赖性的虚拟包装器目标。

这是来自 https://github.com/firebase/firebase-ios-sdk/blob/master/Package.swift 的示例摘录，其中将 FirebaseDynamicLinks 定义为仅在 iOS 上可用，但不适用于 tvOS、macOS 或 watchOS：

    .library(
      name: "FirebaseDynamicLinks",
      targets: ["FirebaseDynamicLinksTarget"]
    ),
.
.
.
    .target(
      name: "FirebaseDynamicLinksTarget",
      dependencies: [.target(name: "FirebaseDynamicLinks",
                             condition: .when(platforms: [.iOS]))],
      path: "SwiftPM-PlatformExclude/FirebaseDynamicLinksWrap"
    ),

    .target(
      name: "FirebaseDynamicLinks",
       ....

如何在 swift 包管理器中使目标产品平台特定

How can you make the target products platform specific in swift package manager

xcode

swift-package-manager