我有一个使用两个版本的Scala的多项目。 Build.scala
看起来像这样:
import sbt._
import Keys._
object Build extends sbt.Build {
lazy val root: Project = Project(
id = "scalacolliderugens",
base = file("."),
aggregate = Seq(gen, core)
)
lazy val gen = Project(...)
lazy val core = Project(...)
val ugenGenerator = TaskKey[Seq[File]]("ugen-generate", "Generate UGen class files")
def runUGenGenerator(source: File, cp: Seq[File]): Seq[File] = Nil // TODO
}
我使用Scala 2.9.2进行纯源生成项目:
lazy val gen = Project(
id = "scalacolliderugens-gen",
base = file("gen"),
settings = Project.defaultSettings ++ Seq(
scalaVersion := "2.9.2", // !!!
libraryDependencies ++= Seq(
"org.scala-refactoring" % "org.scala-refactoring_2.9.1" % "0.4.1"
),
libraryDependencies <+= scalaVersion { sv =>
"org.scala-lang" % "scala-compiler" % sv
}
)
)
包含生成源的实际项目,针对Scala 2.10进行编译:
lazy val core = Project(
id = "scalacolliderugens-core",
base = file("core"),
settings = Project.defaultSettings ++ Seq(
scalaVersion := "2.10.0", // !!!
sourceGenerators in Compile <+= (ugenGenerator in Compile),
ugenGenerator in Compile <<=
(scalaSource in Compile, dependencyClasspath in Runtime in gen) map {
(src, cp) => runUGenGenerator(src, cp.files)
}
)
).dependsOn(gen)
当我编译它时,我得到了警告:
[warn] Binary version (2.9.2) for dependency org.scala-lang#scala-library;2.9.2
[warn] in de.sciss#scalacolliderugens_2.10;1.0.1 differs from Scala binary \
version in project (2.10).
[info] Resolving org.scala-lang#scala-library;2.9.2 ...
[info] Done updating.
[warn] Binary version (2.9.2) for dependency org.scala-lang#scala-library;2.9.2
[warn] in de.sciss#scalacolliderugens-gen_2.10;1.0.1 differs from Scala binary \
version in project (2.10).
[warn] Binary version (2.9.2) for dependency org.scala-lang#scala-compiler;2.9.2
[warn] in de.sciss#scalacolliderugens-gen_2.10;1.0.1 differs from Scala binary \
version in project (2.10).
我应该担心吗?我在这里做坏事吗?
答案 0 :(得分:2)
将以下设置添加到gen项目。
scalaBinaryVersion:= CrossVersion.binaryScalaVersion("2.9.2")
答案 1 :(得分:1)
行...
我有多项目SBT项目,他们通常有SBT设置,部分由所有子项目共享,部分特定于每个子项目。在我的例子中,常见设置包括要使用的Scala版本。
您可以以相同的方式构建规范,并将Scala版本设置放在子项目特定的设置中。如果有必要,您可以进一步对设置进行分层,如果有一些共同的设置,子项目的子集和其他特定于每个子项目的子设置。
答案 2 :(得分:0)
您不能混合来自Scala的不同次要版本的字节码。即,任何2.9.x系列编译器编译的代码不与2.10.x(或2.8.x)编译器发出的代码兼容。