尝试使用在多个swift-package-manager目标中定义的相同类/结构时出错

Question

我想为在不同的SPM目标中定义的class或struct提供相同的名称，但我得到以下错误：

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在MyLibraryTargetOne和MyLibraryTargetTwo中都定义了MyModel

下面是我的SPM清单

// swift-tools-version:5.3
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
  name: "MyLibrary",
  products: [
    // Products define the executables and libraries a package produces, and make them visible to other packages.
    .library(
      name: "MyLibrary",
      targets: ["MyLibrary"]
    ),
    .library(
      name: "MyLibraryTargetOne",
      targets: ["MyLibraryTargetOne"]
    ),
    .library(
      name: "MyLibraryTargetTwo",
      targets: ["MyLibraryTargetTwo"]
    ),
  ],
  dependencies: [
    // Dependencies declare other packages that this package depends on.
    // .package(url: /* package url */, from: "1.0.0"),
  ],
  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: "MyLibrary",
      dependencies: ["MyLibraryTargetOne", "MyLibraryTargetTwo"]
    ),
    .target(
      name: "MyLibraryTargetOne",
      dependencies: ["MyLibraryCore"]
    ),
    .target(
      name: "MyLibraryTargetTwo",
      dependencies: ["MyLibraryCore"]
    ),
    .target(
      name: "MyLibraryCore",
      dependencies: []
    ), 
    .testTarget(
      name: "MyLibraryTest",
      dependencies: ["MyLibrary"]
    ),
  ]
)

是我做错了什么，还是它不受支持？

Answer 1

我试图重现你的问题，但失败了-这实际上是一件好事，因为这意味着有一个可以修复的错误;)

我用Xcode创建了一个单独的包项目，这是一个包含另外两个库的库产品。文件结构如下图所示：

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Package.swift文件：

// swift-tools-version:5.3
import PackageDescription

let package = Package(
    name: "MyLibrary",
    products: [
        .library(name: "MyLibrary", targets: ["MyLibrary"]),
        .library(name: "LibraryA", targets: ["LibraryA"]),
        .library(name: "LibraryB", targets: ["LibraryB"]),
    ],
    dependencies: [],
    targets: [
        .target(name: "MyLibrary",dependencies: ["LibraryA", "LibraryB"]),
        .target(name: "LibraryA",dependencies: []),
        .target(name: "LibraryB",dependencies: []),
        .testTarget(
            name: "MyLibraryTests",
            dependencies: ["MyLibrary"]),
    ]
)

下面是来自MyLibrary的Swift文件：

import LibraryA
import LibraryB

public struct MyModel {
    public let a: LibraryA.MyModel
    public let b: LibraryB.MyModel

    public init(a: LibraryA.MyModel, b: LibraryB.MyModel) {
        self.a = a
        self.b = b
    }
}

A LibraryA/B文件：

public struct MyModel {
    public init() {}
}

XCTest文件：

import XCTest
import LibraryB
import LibraryA
import MyLibrary

final class MyLibraryTests: XCTestCase {
    func testExample() {
        _ = MyModel(a: LibraryA.MyModel(), b: LibraryB.MyModel())
    }
}

一切都按照预期进行了编译和链接。