How to inform SBT to consume specific scala version for plugins?

Question

Now I somehow messed up my global sbt plugins (~/.sbt/plugins/build.sbt). They were always fine retrieved against Scala 2.9.1 which seems to be the version that sbt 0.11.3 wants, and all the plugins (sbt-gpg-plugin, sbt-idea-plugin) are published against 2.9.1.

Now whatever I do, it persistently tries to find them built against 2.9.2:

[warn]  Note: Some unresolved dependencies have extra attributes.  Check that these dependencies exist with the requested attributes.
[warn]      com.github.mpeltonen:sbt-idea:1.0.0 (sbtVersion=0.11.3, scalaVersion=2.9.2)
[warn]      com.jsuereth:xsbt-gpg-plugin:0.6 (sbtVersion=0.11.3, scalaVersion=2.9.2)
...
[error] {file:...}default-50be6e/*:update: sbt.ResolveException: unresolved dependency: com.github.mpeltonen#sbt-idea;1.0.0: not found

How can I fix this, so sbt retrieves the plugins for Scala 2.9.1 as before?

---

For the sake of completeness, this is how my files look after the suggestions:

// project-home/build.sbt
scalaVersion := "2.9.2"
...

 

// project-home/project/plugins.sbt
resolvers += "less is" at "http://repo.lessis.me"

addSbtPlugin( "me.lessis" % "ls-sbt" % "0.1.1" )

scalaVersion := "2.9.1"  // "just in case it helps"

 

// ~/.sbt/plugins/build.sbt
scalaVersion := "2.9.1"  // "just in case it helps"

resolvers += "sbt-idea-repo" at "http://mpeltonen.github.com/maven/"

resolvers += Resolver.url( "sbt-plugin-releases", url( "http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases" ))( Resolver.ivyStylePatterns )

addSbtPlugin("com.github.mpeltonen" % "sbt-idea" % "1.0.0")

addSbtPlugin( "com.jsuereth" % "xsbt-gpg-plugin" % "0.6" )

---

What is even worse, the problem persists, even after I removed ~/.sbt/plugins/build.sbt. So there are no more references (at least visible to me) to either sbt-idea or xsbt-gpg-plugin. Still I cannot compile any project any more, because sbt still tries to find those two plugins. Epic fail.

Answer 1

You could provide the Scala version of plugin. I didn't use ~/.sbt/, but I think it will works too.

The following is my project configuration using Scala 2.9.2 as my project compiler, and using some pluign that are compiled from Scala 2.9.1. Since Scala 2.9.1 and Scala 2.9.2 is binary compatible, I don't encounter any problem yet.

// MyProject/build.sbt

name := "MyProject"            

version := "0.1"            

scalaVersion := "2.9.2"     

The following is plugin configuration:

// File: MyProject/project/plugins.sbt

import sbt._

import Defaults._

resolvers += Resolver.url("sbt-plugin-releases",
  new URL("http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases/"))(
    Resolver.ivyStylePatterns)


// Resolved to: 
//
//  http://..../com.untyped/sbt-less/scala_2.9.1/sbt_0.11.3/0.4/jars/sbt-less.jar 
//
libraryDependencies += sbtPluginExtra(
    m = "com.untyped" % "sbt-less" % "0.4", // Plugin module name and version
    sbtV = "0.11.3",    // SBT version
    scalaV = "2.9.1"    // Scala version compiled the plugin
)