前言
今天在浏览网站的时候发现有一篇 Linux 的 Swift 语言简单入门。经历6个小时的网络搜索终于搞定。
随着 Swift 语言的开源，不再是 Apple 系列的专属语言了。我们可以将 Swift 的代码部署到 Linux 服务器，尽一步促进 Swift & Apple 生态的发展。
而几乎没有预操作，内存更小，可以打成可执行包，ARC（而不是跟踪垃圾收集）垃圾回收，成为服务器界的一霸指日可待。
Vapor 是 Swift Top1 的 Web 框架，中文文档也是比较全面。
开始吧
如果你的服务器访问不到 Github 服务器，请配置以下
# 将 github.com 替换成国内加速地址
git config --global url."https://hub.fastgit.org/".insteadOf https://github.com/
安装 Swift
如果你是 Mac 上面测试，忽略这步吧。Swift 官网比较全的文档，其他系统自取。
[wissy@wissy PristisApi]$ cat /etc/centos-release
CentOS Linux release 8.4.2105
安装依赖
安装 main repo 拥有的包
yum install binutils gcc git libbsd-devel libedit libicu-devel pkg-config python2 sqlite
安装 CentOS-PowerTools repo
# 下载 repo 文件
wget https://gist.githubusercontent.com/austinsonger/23bfc812382b44eaed001908e94bc2cf/raw/4d6f8e11f2bd1387b9a544160481e1428c1519b8/CentOS-PowerTools.repo \
-O /etc/yum.repos.d/CentOS-PowerTools.repo
# 更新 index 缓存
yum update
安装官网显示其他依赖
yum install glibc-static libstdc++-static libedit-devel
安装 <sys/parm.h> 依赖
dnf install glibc-headers
报错 could not build module 'SwiftGlibc'，请安装官网指定的依赖，切记不能跳过。
下载 Swift 包
Swift 包有Development，Releases，Snapshots，建议生产部署使用 Releases 版。
其他系统请换成相应地址。
# 下载 Swift 5.4.2
wget https://swift.org/builds/swift-5.4.2-release/centos8/swift-5.4.2-RELEASE/swift-5.4.2-RELEASE-centos8.tar.gz
# 导入 PGP 钥匙串
wget -q -O - https://swift.org/keys/all-keys.asc | gpg --import -
# 验证
略。。。
# 解压
tar xavf wift-5.4.2-RELEASE-centos8.tar.gz
mv swift-5.4.2-RELEASE-centos8 /opt/software/swift/
# 设置环境变量 /etc/profile
# Swift
export SWIFT_HOME="/opt/software/swift"
export C_INCLUDE_PATH=$SWIFT_HOME/usr/lib/swift/clang/include/
export CPLUS_INCLUDE_PATH=$C_INCLUDE_PATH
export PATH=$SWIFT_HOME/usr/bin:$PATH
#重新加载一下添加的环境变量文件
source /etc/profile
测试 Swift
[wissy@wissy PristisApi]$ swift --version
Swift version 5.4.2 (swift-5.4.2-RELEASE)
Target: x86_64-unknown-linux-gnu
写个脚本简单测试一下
[wissy@wissy PristisApi]$ echo "print(\"Hello World\")" > hello.swift
[wissy@wissy PristisApi]$ swift hello.swift
Hello World
创建一个 Package 全面测试一下
[wissy@wissy swift]$ mkdir Test
[wissy@wissy swift]$ cd Test/
[wissy@wissy Test]$ swift package init --type executable
Creating executable package: Test
Creating Package.swift
Creating README.md
Creating .gitignore
Creating Sources/
Creating Sources/Test/main.swift
Creating Tests/
Creating Tests/TestTests/
Creating Tests/TestTests/TestTests.swift
[wissy@wissy Test]$ swift test
[13/13] Build complete!
Test Suite 'All tests' started at 2021-08-01 11:57:59.307
Test Suite 'debug.xctest' started at 2021-08-01 11:57:59.308
Test Suite 'TestTests' started at 2021-08-01 11:57:59.308
Test Case 'TestTests.testExample' started at 2021-08-01 11:57:59.308
Test Case 'TestTests.testExample' passed (0.052 seconds)
Test Suite 'TestTests' passed at 2021-08-01 11:57:59.361
Executed 1 test, with 0 failures (0 unexpected) in 0.052 (0.052) seconds
Test Suite 'debug.xctest' passed at 2021-08-01 11:57:59.361
Executed 1 test, with 0 failures (0 unexpected) in 0.052 (0.052) seconds
Test Suite 'All tests' passed at 2021-08-01 11:57:59.361
Executed 1 test, with 0 failures (0 unexpected) in 0.052 (0.052) seconds
[wissy@wissy Test]$ swift run
[0/0] Build complete!
Hello, world!
安装 Vapor
编译 Vapor 工具包
[scode type="yellow"]mac 直接使用 brew install vapor安装[/scode]
git clone https://github.com/vapor/toolbox.git
cd toolbox
git checkout <desired version>
swift build -c release --disable-sandbox --enable-test-discovery
mv .build/release/vapor /usr/local/bin
创建自己的项目
[wissy@wissy swift]$ vapor new Test
Cloning template...
name: Test
Would you like to use Fluent? (--fluent/--no-fluent)
y/n> y
fluent: Yes
db: SQLite
Would you like to use Leaf? (--leaf/--no-leaf)
y/n> y
leaf: Yes
Generating project files
+ Package.swift
+ main.swift
+ configure.swift
+ routes.swift
+ Todo.swift
+ CreateTodo.swift
+ .gitkeep
+ TodoController.swift
+ AppTests.swift
+ index.leaf
+ Dockerfile
+ docker-compose.yml
+ .gitignore
+ .dockerignore
Creating git repository
Adding first commit
**
**~~**
**~~~~~~**
**~~~~~~~~~~**
**~~~~~~~~~~~~~~**
**~~~~~~~~~~~~~~~~~~**
**~~~~~~~~~~~~~~~~~~~~~~**
**~~~~~~~~~~~~~~~~~~~~~~~~**
**~~~~~~~~~~~~~~~~~~~~~~~~~~**
**~~~~~~~~~~~~~~~~~~~~~~~~~~~~**
**~~~~~~~~~~~~~~~~~~~~~~~~~~~~**
**~~~~~~~~~~~~~~~~~~~~~++++~~~**
**~~~~~~~~~~~~~~~~~~~++++~~~**
***~~~~~~~~~~~~~~~++++~~~***
****~~~~~~~~~~++++~~****
*****~~~~~~~~~*****
*************
_ __ ___ ___ ___
\ \ / / /\ | |_) / / \ | |_)
\_\/ /_/--\ |_| \_\_/ |_| \
a web framework for Swift
Project Test has been created!
Use cd 'Test' to enter the project directory
Use vapor xcode to open the project in Xcode
[wissy@wissy swift]$
运行项目 & 安装依赖
因为我这边用到了 sqlite 需要安装一下开发包，系统的 zlib 也需要开发包
dnf install zlib-devel
dnf install libsq3-devel
使用 vapor 工具运行
[wissy@wissy PristisApi]$ vapor run serve --port 1337 --hostname 127.0.0.1
warning: '--enable-test-discovery' option is deprecated; tests are automatically discovered on all platforms
[0/0] Build complete!
[ NOTICE ] Server starting on http://127.0.0.1:1337
使用 swift run
如果需要自定义端口和地址需要修改 Sources/App/configure.swift
app.http.server.configuration.port = 1337
app.http.server.configuration.hostname = "127.0.0.1"
[wissy@wissy PristisApi]$ swift run
[0/0] Build complete!
[ NOTICE ] Server starting on http://127.0.0.1:1337
结尾
?恭喜你，到了这一步你已经完成了Swift Web Vapor 入门。
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