Question

我喜欢在顶层定义scalacOptions，如此（例如，暂时忽略项目轴）：

scalacOptions += "-Ywarn-unused-import"

但后来我意识到console过于严格。所以我试着设置：

scalacOptions in console ~= (_ filterNot (_ == "-Ywarn-unused-import"))

但那不起作用（在REPL中仍有（致命）警告）。

我使用inspect来尝试理解原因：

> inspect console
[info] Task: Unit
[info] Description:
[info]  Starts the Scala interpreter with the project classes on the classpath.
[info] Provided by:
[info]  {file:/a/}b/compile:console
[info] Defined at:
[info]  (sbt.Defaults) Defaults.scala:261
[info] Dependencies:
[info]  compile:console::compilers
[info]  compile:console::initialCommands
[info]  compile:console::fullClasspath
[info]  compile:console::taskTemporaryDirectory
[info]  compile:console::scalaInstance
[info]  compile:console::streams
[info]  compile:console::cleanupCommands
[info]  compile:console::scalacOptions
[info] Delegates:
[info]  compile:console
[info]  *:console
[info]  {.}/compile:console
[info]  {.}/*:console
[info]  */compile:console
[info]  */*:console
[info] Related:
[info]  test:console

注意：console是

由compile:console
取决于compile:console::scalacOptions

然后：

> inspect compile:console::scalacOptions
[info] Task: scala.collection.Seq[java.lang.String]
[info] Description:
[info]  Options for the Scala compiler.
[info] Provided by:
[info]  {file:/a/}b/compile:scalacOptions
[info] Defined at:
[info]  (sbt.Classpaths) Defaults.scala:1593
[info] Reverse dependencies:
[info]  compile:console
[info] Delegates:
[info]  compile:console::scalacOptions
[info]  compile:scalacOptions
[info]  *:console::scalacOptions
[info]  *:scalacOptions
[info]  {.}/compile:console::scalacOptions
[info]  {.}/compile:scalacOptions
[info]  {.}/*:console::scalacOptions
[info]  {.}/*:scalacOptions
[info]  */compile:console::scalacOptions
[info]  */compile:scalacOptions
[info]  */*:console::scalacOptions
[info]  */*:scalacOptions
[info] Related:
[info]  *:console::scalacOptions
[info]  compile:scalacOptions
[info]  *:scalacOptions
[info]  */*:scalacOptions
[info]  test:scalacOptions

注意：compile:console::scalacOptions是

由compile:scalacOptions
在代表链中没有达到*:console::scalacOptions（这是我定义的）

我的问题是如何为控制台的所有配置覆盖scalacOptions？是否可以更改授权链？

我希望避免设置scalacOptions in (Compile, console)（因为它会与(Test, console)重复）或定义一个scalac选项的val。

Answer 1

我的问题是如何为控制台的所有配置覆盖scalacOptions？

我不认为我们可以提供由compile:scalacOptions提供的Defaults。唯一具有更高优先级的范围是compile:console::scalacOptions。在大多数情况下，人们不希望Compile和Test设置跨线，因此配置范围更高优先级我认为不是默认设置。

lazy val commonSettings = Seq(
  scalaVersion := "2.11.4",
  scalacOptions += "-Ywarn-unused-import",
  scalacOptions in (Compile, console) ~= (_ filterNot (_ == "-Ywarn-unused-import")),
  scalacOptions in (Test, console) := (scalacOptions in (Compile, console)).value
)

是否可以更改授权链？

不，这是不可能的。 BuildStructure中有一个delegates函数的单个实例，它在加载时初始化并用于所有任务。订购在Scope.delegates完成。

Answer 2

我在自动插件中修复了错误的scalac选项：

develop

在sbt中，如何在所有配置中覆盖控制台的scalacOptions？

2 个答案: