[Cake] 2. dotnet 全域性工具 cake

在上篇部落格[Cake] 1. CI中的Cake中介紹瞭如何在CI中利用Cake來保持與CI/CD環境的解耦。

當時dotnet 2.1還未正式釋出，dotnet 還沒有工具的支援，使得安裝cake非常麻煩。不過隨著 dotnet tool 的加入，這一問題得到了很好的解決。目前安裝cake（0.30.0版本之後）只需要一行命令即可：

1 dotnet tool install -g cake.tool

然後就可以使用cake了。用 dotnet cake 或者 dotnet-cake 都可以，推薦使用前者。

 1 $ dotnet cake --help
 2 
 3 Usage: Cake.exe [script] [--verbosity=value]
 4                 [--showdescription] [--dryrun] [..]
 5 
 6 Example: Cake.exe
 7 Example: Cake.exe build.cake --verbosity=quiet
 8 Example: Cake.exe build.cake --showdescription
 9 
10 Options:
11     --verbosity=value    Specifies the amount of information to be displayed.
12                          (Quiet, Minimal, Normal, Verbose, Diagnostic)
13     --debug              Performs a debug.
14     --showdescription    Shows description about tasks.
15     --showtree           Shows the task dependency tree.
16     --dryrun             Performs a dry run.
17     --exclusive          Execute a single task without any dependencies.
18     --bootstrap          Download/install modules defined by #module directives
19     --version            Displays version information.
20     --info               Displays additional information about Cake execution.
21     --help               Displays usage information.

上一篇部落格[Cake] 1. CI中的Cake中出現的cake的引導指令碼 build.ps1 和 build.sh ，絕大部分程式碼都是在下載安裝cake用的，既然有了上面的 dotnet tool 命令可以安裝cake，那麼當然也就可以簡化一下了。

引導指令碼中包含安裝和執行命令的程式碼。nuget相關的環境變數是專案需要的，cake指令碼可以讀取這些資訊來使用。

2.1 cake.ps1

 1 [string]$SCRIPT       = '0-build/build.cake'
 2 [string]$CAKE_VERSION = '0.33.0'
 3 
 4 # nuget server config
 5 $ENV:NUGET_REPOSITORY_API_URL = "http://nuget-server.test/nuget"
 6 $ENV:NUGET_REPOSITORY_API_KEY = "123456"
 7 
 8 # Install cake.tool
 9 dotnet tool install --global cake.tool --version $CAKE_VERSION
10 
11 # Start Cake
12 [string]$CAKE_ARGS = "-verbosity=diagnostic"
13 
14 Write-Host "dotnet cake $SCRIPT $CAKE_ARGS $ARGS" -ForegroundColor GREEN
15 
16 dotnet cake $SCRIPT $CAKE_ARGS $ARGS

檢視一下cake指令碼都有哪些task：

 1 $ .\cake.ps1 --showtree
 2 Tool 'cake.tool' is already installed.
 3 dotnet cake 0-build/build.cake -verbosity=diagnostic --showtree
 4 
 5 ....
 6 
 7 default
 8 └─test
 9    └─build
10       ├─clean
11       └─restore
12 
13 push
14 └─pack
15    └─test
16       └─build
17          ├─clean
18          └─restore

2.2 cake.sh

 1 #!/bin/sh
 2 
 3 SCRIPT='0-build/build.cake'
 4 CAKE_VERSION='0.33.0'
 5 
 6 # nuget server config
 7 export NUGET_REPOSITORY_API_URL='http://nuget-server.test/nuget'
 8 export NUGET_REPOSITORY_API_KEY='123456'
 9 
10 # Install  cake.tool
11 dotnet tool install --global cake.tool --version $CAKE_VERSION
12 export PATH="$PATH:$HOME/.dotnet/tools"
13 
14 # Start Cake
15 CAKE_ARGS="$SCRIPT -verbosity=diagnostic"
16 
17 echo "\033[32mdotnet cake $CAKE_ARGS $@"
18 
19 dotnet cake $CAKE_ARGS "$@"

CI/CD的yaml配置檔案不用做調整，只需執行對 cake.sh 或者 cake.ps1 的呼叫即可。這也是cake帶來的避免在CI/CD中程式設計的好處，所有的邏輯都位於cake指令碼中。

dotnet tool https://docs.microsoft.com/zh-cn/dotnet/core/tools/dotnet-tool-install

cake 示例專案 https://github.com/linianhui/cake.example