为什么SBT找不到Play 2.1插件？

Question

在我的plugins.sbt文件中，我有

scalaVersion := "2.10.0"

resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"

addSbtPlugin("play" % "sbt-plugin" % "2.1")  

当我尝试运行sbt时，我得到了

[warn] ==== Typesafe repository: tried
[warn]   http://repo.typesafe.com/typesafe/releases/play/sbt-plugin_2.10_0.12/2.1/sbt-        plugin-2.1.pom
[warn] ==== public: tried
[warn]   http://repo1.maven.org/maven2/play/sbt-plugin_2.10_0.12/2.1/sbt-plugin-2.1.pom
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: play#sbt-plugin;2.1: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]
[warn]  Note: Some unresolved dependencies have extra attributes.  Check that these         dependencies exist with the requested attributes.
[warn]          play:sbt-plugin:2.1 (sbtVersion=0.12, scalaVersion=2.10)
[warn]
sbt.ResolveException: unresolved dependency: play#sbt-plugin;2.1: not found

为什么SBT找不到插件？我也尝试过addSbtPlugin("play" % "sbt-plugin" % "2.1-RC1")，也有类似的结果。

Answer 1

问题是在plugins.sbt文件中包含scalaVersion设置。这会导致sbt在存储库中搜索sbt-plugin_2.10.0_0.12，而实际上应该搜索sbt-plugin_2.9.2_0.12。

我不确定在plugins.sbt文件中指定scalaVersion背后的语义，但可能它声明了运行SBT的Scala版本。

以下是Play 2.1SBT插件文件的链接：http://repo.typesafe.com/typesafe/simple/ivy-releases/play/sbt-plugin/scala_2.9.2/sbt_0.12/2.1-RC1/srcs/

Answer 2

根据文档，在您的project/plugins.sbt中添加以下内容

addSbtPlugin("play" % "sbt-plugin" % "2.1.0")

更改project/build.properties

sbt.version=0.12.2