使用 Scala 2.10 和 SBT 0.13.2 构建时,我想要 -language:_
,但这不被 Scala 2.9 识别。有一个关于设置不同的问题 scalacOptions
用于交叉编译( Conditional scalacOptions with SBT ),但大约是 build.sbt
.我正在使用 Build.scala
因为我正在做一个多项目构建。
我试过这个:
def scalacOptionsVersion(v: String) = {
Seq(
"-unchecked",
"-deprecation",
"-Xlint",
"-Xfatal-warnings",
"-Ywarn-dead-code",
"-target:jvm-1.7",
"-encoding", "UTF-8") ++ (
if (v.startsWith("2.9")) Seq() else Seq("-language:_"))
}
override val settings = super.settings ++ Seq(
...,
scalaVersion := "2.10.4",
scalacOptions <++= scalaVersion(scalacOptionsVersion),
crossScalaVersions := Seq("2.9.2", "2.10.4", "2.11.4"),
...
)
但我收到一个错误:
[error] /Users/benwing/devel/lemkit/scala/project/build.scala:29: type mismatch;
[error] found : sbt.Def.Initialize[Equals]
[error] required: sbt.Def.Initialize[sbt.Task[?]]
[error] Note: Equals >: sbt.Task[?], but trait Initialize is invariant in type T.
[error] You may wish to define T as -T instead. (SLS 4.5)
[error] scalacOptions <++= scalaVersion(scalacOptionsVersion),
[error] ^
[error] one error found
帮助?
最佳答案
在 SBT 0.13+ 中,这将起作用:
def scalacOptionsVersion(scalaVersion: String) = {
Seq(
"-unchecked",
"-deprecation",
"-Xlint",
"-Xfatal-warnings",
"-Ywarn-dead-code",
"-target:jvm-1.7",
"-encoding", "UTF-8"
) ++ CrossVersion.partialVersion(scalaVersion) match {
case Some((2, scalaMajor)) if scalaMajor == 9 => Nil
case _ => Seq("-language:_")
}
}
val appSettings = Seq(
scalacOptions := scalacOptionsVersion(scalaVersion.value)
// other settings...
)
关于scala - 使用 Build.scala 进行交叉编译时,如何为每个 Scala 版本设置不同的 scalacOptions?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27698586/