PackageDescription API 官方文档

• 进入到.xcodeproj同级目录下

  swift package init --type library

  Creating library package: Example
  Creating Package.swift
  Creating README.md
  Creating .gitignore
  Creating Sources/
  Creating Sources/Example/Example.swift

  • 参数说明

    • --type
    • empty: 空包
      • Source 文件夹下什么都没有，也不能编译
    • library: 静态包
      • Source 文件夹下有个和包同名 swift 文件，里面有个空结构体
    • executable: 可执行包
      • Source 文件夹下有个 main.swift 文件，在 build 之后会在 .build/debug/ 目录下生成一个可执行文件，可通过 swift run 或者直接点击运行，从而启动一个进程
    • system-module: 系统包
      • 这种包是专门为了链接系统库（例如 libgit、jpeglib、mysql 这种系统库）准备的，本身不需要任何代码，所以也没有 Source 文件夹，但是需要编辑 module.modulemap 文件去查找系统库路径 (Swift 4.2 已经被其他方式取代)

Package.swift，这个文件就相当于 CocoaPods 的 Podfile 或者 Carthage 的 Cartfile.

• 以SBLibrary为例(SB是Swift Basic的缩写, 不要歪楼开脑洞😅)

  // swift-tools-version:5.3
  import PackageDescription
  
  let package = Package(
      name: "SBLibrary",
      platforms: [.iOS(.v10)],
      products: [
          // Products define the executables and libraries a package produces, and make them visible to other packages.
          .library(name: "SBLibrary", targets: ["SBLibrary"]),
  
          .library(name: "SBLibraryDynamic", type: .dynamic, targets: ["SBLibrary"]),
  
          .library(name: "SBLibraryStatic", type: .static, targets: ["SBLibrary"]),
      ],
      dependencies: [
          // Dependencies declare other packages that this package depends on.
          // .package(url: /* package url */, from: "1.0.0"),
          .package(url: "https://github.com/Quick/Quick.git", from: "2.2.0"),
          .package(url: "https://github.com/Quick/Nimble.git", from: "8.0.7")
      ],
      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: "SBLibrary",
              dependencies: []),
          .testTarget(
              name: "Pods-SBLibrary_Tests",
              dependencies: ["SBLibrary", "Quick", "Nimble"],
              path: "../SBLibrary/"),
      ]
  )