蒸汽项目不使用Swift 4和Xcode 9建立/运行

Question

我已经安装了最新版本的Xcode 9，并且已经用brew重新安装了几次，但是每当我试图构建/运行/更新项目时，我仍然会收到以下错误。

下面是我的工作

1.) Vapor Toolbox: 3.1.2

2.) Apple Swift version 4.0 (swiftlang-900.0.43 clang-900.0.22.8)
    Target: x86_64-apple-macosx10.9

3.) Xcode 9.0
    Build version 9M136h

Error: Could not generate Xcode project: error: manifest parse error(s):
/var/folder/60/n3ldjzgs5vsg06v17_1yy44h0000gn/T/TemporaryFile.VwrbJo.swift:41:5
: error: argument 'targets' must preceed argument 'dependencies'
    targets" [
    ^
error: The product dependency 'Vapor' was not found.
error: The product dependency 'FluentProvider' was not found.
error: The product dependency 'Testing' was not found.

这是我的Package.swift文件。看看我最初的错误，我确实尝试了切换文件中“目标”和“依赖关系”的顺序。这没有解决任何问题，并产生了以下错误消息：error: argument 'dependencies' must precede argument 'targets'

Package.swift

let package = Package(
    name: "test",
    products: [
        .library(name: "App", targets: ["App"]),
        .executable(name: "Run", targets: ["Run"])
    ],
    dependencies: [
        .package(url: "https://github.com/vapor/vapor.git", .upToNextMajor(from: "2.1.0")),
        .package(url: "https://github.com/vapor/fluent-provider.git", .upToNextMajor(from: "1.2.0")),
    ],
    targets: [
        .target(
            name: "App",
            dependencies: ["Vapor", "FluentProvider"],
            exclude: [
                    "Config",
                    "Public",
                    "Resources",
                    ]
        ),
        .target(name: "Run", dependencies: ["App"]),
        .testTarget(name: "AppTests", dependencies: ["App", "Testing"])
    ]
)

Answer 1

Xcode 12 /SWIFT5.3更新

vapor现在是homebrew/core的一部分。资料来源: github 自制-核心/公式/蒸气.。

##### If applicable, remove the obsolete 'vapor/tap' #####
## List current taps:
brew tap
# homebrew/core
# vapor/tap
## Remove tap:
brew untap vapor/tap

#### Install current version of vapor #####
brew install vapor
brew upgrade vapor

Xcode 9/ Swift 4

1. 复核版本：“最新版本”至少是Xcode 9.1 (9B55)和苹果Swift 4.0.2 (迅捷-900.69.1 clang-900.0.38)
2. 验证Packages.swift中的第一行是// swift-tools-version:4.0。如果没有swift-tools-version行，Packages.swift可以作为快速工具-version 3进行处理，这将导致错误。

cd _PROJECT_PATH_
swift package tools-version
# if not 4.0.0, then …
swift package tools-version --set-current

下面是一个例子，Package.swift。有关其他信息，请参阅Swift软件包管理器清单API重新设计和快速包管理器使用文档。

// swift-tools-version:4.0
// The swift-tools-version declares the minimum version of Swift
// required to build this package. 
// Syntax: '// swift-tools-version:<specifier>' on the 1st line

import PackageDescription

let package = Package(
    name: "test",
    products: [
        .library(name: "App", targets: ["App"]),
        .executable(name: "Run", targets: ["Run"])
    ],
    dependencies: [
        .package(url: "https://github.com/vapor/vapor.git", .upToNextMajor(from: "2.3.0")),
        .package(url: "https://github.com/vapor/fluent-provider.git", .upToNextMajor(from: "1.3.0")),
    ],
    targets: [
        .target(
            name: "App",
            dependencies: ["Vapor", "FluentProvider"],
            exclude: [
                    "Config",
                    "Public",
                    "Resources",
                    ]
        ),
        .target(name: "Run", dependencies: ["App"]),
        .testTarget(name: "AppTests", dependencies: ["App", "Testing"])
    ]
)

1. 复核

cd _PROJECT_PATH_
swift package tools-version
# should be 4.0.0

vapor clean
vapor update
vapor --version

# Vapor Toolbox: 3.1.2
# Vapor Framework: 2.3.0

1. 再建一次。

StackOverflow 这里上有更多关于使用Xcode 9和Swift 4与Vapor 2的注释。

GitHub存储库蒸气示例实验室有几个已迁移到Vapor 2和Swift 4的示例项目。