解决 Scala SBT 中的导入冲突

Question

我正在尝试遵循此 tutorial，但我两天都遇到同样的错误。我在 SO 中发现了一些类似的问题，但其中任何一个都对我有所帮助（可能是因为我对 scala 和 sbt 缺乏了解）。

这是我的build.sbt

name := "fitman"

version := "1.0"

scalaVersion := "2.11.6"

lazy val versions = new {
  val finatra = "2.1.2"
  val logback = "1.1.3"
}

resolvers ++= Seq(
  Resolver.sonatypeRepo("releases"),
  "Twitter Maven" at "https://maven.twttr.com"
)

libraryDependencies += "com.twitter.finatra" %% "finatra-http" % versions.finatra
libraryDependencies += "com.twitter.finatra" %% "finatra-slf4j" % versions.finatra
libraryDependencies += "ch.qos.logback" % "logback-classic" % versions.logback

这是我试图理解的警告：

SBT project import
                [warn] Scala version was updated by one of library dependencies:
                [warn]  * org.scala-lang:scala-library:(2.11.6, 2.11.4, 2.11.0, 2.11.2) -> 2.11.7
                [warn] To force scalaVersion, add the following:
                [warn]  ivyScala := ivyScala.value map { _.copy(overrideScalaVersion = true) }
                [warn] Run 'evicted' to see detailed eviction warnings
                [warn] Multiple dependencies with the same organization/name but different versions. To avoid conflict, pick one version:
                [warn]  * org.scala-lang:scala-library:(2.11.7, 2.11.6)
                [warn]  * org.scala-lang:scala-reflect:(2.11.7, 2.11.6)
                [warn]  * org.scala-lang.modules:scala-parser-combinators_2.11:(1.0.4, 1.0.3)
                [warn]  * org.scala-lang.modules:scala-xml_2.11:(1.0.5, 1.0.3)

Answer 1

您使用的其中一个库需要 Scala 2.11.7，因此 SBT 将用它覆盖您的 scalaVersion 设置。更新构建文件中的 Scala 版本：

scalaVersion := "2.11.7"

解决 Scala SBT 中的导入冲突

Resolving import conflicts in Scala SBT

scala

sbt

finatra