swift Ubuntu 上的 CryptoKit

Question

我正在尝试将一个小 swift 程序“main.swift”编译为 Ubuntu 18.08 上的可执行文件。我用的是Swift Package Manager to manage my dependencies. In this very simple case I only have one dependency, namely this open-source CryptoKit。我有一个 swift 文件试图导入 CryptoKit。

import Foundation
import CryptoKit
print("phew")

我的 Package.swift 文件如下所示：

// swift-tools-version:5.2

import PackageDescription

let package = Package(
    name: "decryp",
    dependencies: [
      .package(url: "https://github.com/apple/swift-crypto.git", .upToNextMajor(from: "1.0.1"))
    ],
    targets: [
        .target(
            name: "decryp",
            dependencies: ["swift-crypto"]
        ),
        .testTarget(
            name: "decrypTests",
            dependencies: ["decryp"]),
    ]
)

当我尝试使用 swift build 构建可执行文件时，它会获取存储库，但随后会出现错误，提示未找到产品。来自 swift 构建的标准输出：

Fetching https://github.com/apple/swift-crypto.git
Cloning https://github.com/apple/swift-crypto.git
Resolving https://github.com/apple/swift-crypto.git at 1.0.2
'decryp' /home/kah/decryp: error: product 'swift-crypto' not found. It is required by target 'decryp'.
warning: dependency 'swift-crypto' is not used by any target

也许我遗漏了一些明显的东西？我还是swift世界的初学者。

Answer 1

看着swift-crypto Package.swift给了一个线索。 swift-crypto 库名称是“Crypto”，所以我尝试使用它，但出现错误：

 error: dependency 'Crypto' in target 'decryp' requires explicit declaration; 
 reference the package in the target dependency with '.product(name: "Crypto", 
 package: "swift-crypto")'

但这说明了该怎么做，所以当我将 Package.swift 更改为以下内容并导入“Crypto”而不是“CryptoKit”时，一切正常！

// swift-tools-version:5.2

import PackageDescription

let package = Package(
    name: "decryp",
    dependencies: [
      .package(url: "https://github.com/apple/swift-crypto.git", .upToNextMajor(from: "1.0.1"))
    ],
    targets: [
        .target(
            name: "decryp",
            dependencies: [
              .product(name: "Crypto", package: "swift-crypto")
]
        ),
        .testTarget(
            name: "decrypTests",
            dependencies: ["decryp"]),
    ]
)

现在我可以从我的 phone 发送加密消息到服务器，然后在我的 ubuntu 笔记本电脑上本地解密，感谢 swift-crypto 团队！

swift Ubuntu 上的 CryptoKit

swift CryptoKit on Ubuntu

swift

swift-package-manager

apple-cryptokit