scala - 在 sbt 中，如何在所有配置中覆盖控制台的 scalacOptions？

Question

我喜欢定义 scalacOptions像这样在顶层(例如，暂时忽略项目轴):

scalacOptions += "-Ywarn-unused-import"

但后来我意识到这对 console 来说太严格了。 .所以我尝试设置:

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

但这不起作用(在 REPL 中仍然收到(致命)警告)。

我用了 inspect尝试了解原因:

> 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: console是

由 compile:console 提供

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: compile:console::scalacOptions是

由 compile:scalacOptions 提供

达不到 *:console::scalacOptions (这是我定义的)在委托(delegate)链

我的问题是如何覆盖 scalacOptions控制台的所有配置？是否可以更改委托(delegate)链？

我想避免设置 scalacOptions in (Compile, console) (因为它会为 (Test, console) 重复)或定义一个 val 的 scalac 选项。

Answer 1

My question is how do I override scalacOptions for all configurations for console?

我认为我们不能给出 compile:scalacOptions 的存在。由 sbt 的 Defaults 提供.唯一具有更高优先级的范围是 compile:console::scalacOptions .
在大多数情况下，人们不会想要 Compile和 Test设置跨线，所以配置范围更高的优先级我不认为是一个糟糕的默认值。

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
)

Is it possible to change the delegation chain?

不，这是不可能的。
有一个 delegates 的实例 BuildStructure中的函数，并且在加载时初始化并用于所有任务。
订购在 Scope.delegates 中完成.