如何依賴於「當前」配置中的設置

如何聲明2個自定義設置，例如A和B，在Global配置範圍中定義B，其內容依賴於A，在幾個配置範圍中對A定義不同以這樣的方式，即使B只定義一次，每個配置中B的結果值是不同的？如何依賴於「當前」配置中的設置

請考慮下面的例子targetHost，在remote定義不同於其他的配置，並根據其scriptContent：

object MyBuild extends Build { 

    lazy val remote = config("remote") describedAs ("configuration for remote environement ") 

    lazy val targetHost = settingKey[String]("private hostname of master server") 

    lazy val scriptContent = settingKey[String]("Some deployment script") 

    lazy val root: Project = Project("meme", file(".")). 
    settings(
     name := "hello", 

     targetHost := "localhost", 
     targetHost in remote := "snoopy", 

     scriptContent := s""" 
      # some bash deployment here 
      /usr/local/uberDeploy.sh ${targetHost.value} 
     """ 
    )  
}

我想scriptContent有兩種配置範圍不同的值，但由於它取決於就在Global範圍targetHost其價值始終是相同的：

> scriptContent 
[info] 
[info]    # some bash deployment here 
[info]    /usr/local/uberDeploy.sh localhost 
[info] 
> remote:scriptContent 
[info] 
[info]    # some bash deployment here 
[info]    /usr/local/uberDeploy.sh localhost 
[info]

而我想獲取以下信息：

> scriptContent 
[info] 
[info]    # some bash deployment here 
[info]    /usr/local/uberDeploy.sh localhost 
[info] 
> remote:scriptContent 
[info] 
[info]    # some bash deployment here 
[info]    /usr/local/uberDeploy.sh snoopy 
[info]

來源

2015-06-15 Svend

我猜你需要明確指定任務的範圍。例如，在兩個範圍內實現兩個'scriptContent'，一個是'targetHost in remote'，另一個是簡單的'targetHost'。 – marios

找到了！我的問題實際上是重複的（對不起...），最相關的答案在這裏：How can i make an SBT key see settings for the current configuration?

=>我們需要多次應用設置，每個作用域一次，以強制重新評估的scriptSetting內容：

import sbt._ 
import sbt.Keys._ 

object MyBuild extends Build { 

    lazy val remote = config("remote") describedAs ("configuration for remote environement ") 

    lazy val targetHost = settingKey[String]("private hostname of master server") 

    lazy val scriptContent = settingKey[String]("Some deployment script") 

    lazy val scriptSettings = Seq(
     scriptContent := s""" 
      # some bash deployment here 
      /usr/local/uberDeploy.sh ${targetHost.value} 
     """ 
    ) 

    lazy val root: Project = Project("meme", file(".")) 
    .settings(
     name := "hello",  
     targetHost := "localhost", 
     targetHost in remote := "snoopy" 
     )  
    .settings(scriptSettings: _*) 
    .settings(inConfig(remote)(scriptSettings) :_*) 
}

產生預期的結果：

> scriptContent 
[info] 
[info]    # some bash deployment here 
[info]    /usr/local/uberDeploy.sh localhost 
[info] 
> remote:scriptContent 
[info] 
[info]    # some bash deployment here 
[info]    /usr/local/uberDeploy.sh snoopy 
[info] 
>

來源

2015-06-17 16:02:55 Svend

如何依賴於「當前」配置中的設置

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