Why does sbt throw "value enablePlugins is not a member of sbt.Project" exception?

Question

I am trying to enable a custom AutoPlugin in a project using SBT version 0.13.5. When I try to enable the plugin in my build.sbt via:

val aProject = project.in(file("foo")).enablePlugins(MyAutoPlugin)

I get the following error when trying to start SBT from the command line:

value enablePlugins is not a member of sbt.Project
... (big stack trace) ...
[error] sbt.compiler.EvalException: Type error in expression
[error] Use 'last' for the full log.
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?

When I look at the source code for sbt.Project I see that enablePlugins is defined. What is going on here?

Edit: when I remove the call to enablePlugins I can successfully start an SBT session. Running > about confirms that SBT version is 0.13.5.

Edit 3: I found that when I publish plugins to Sonatype with a version in the format of "2014.06.26-1-SNAPSHOT" that SBT fails to load with above error. However, if I change the format to include a single letter after "-1", then SBT loads. So this version format works: "2014.06.26-1a-SNAPSHOT". I discovered this because I found resolving to locally published plugins seemed to work fine (for all but one plugin that never worked), while resolving to the exact same plugins published to Sonatype caused the error. When I published locally, I always added a letter to the version.

Edit 2: full output of SBT log:

[info] Loading global plugins from /Users/markschaake/.sbt/0.13/plugins
[debug] 
[debug] Initial source changes: 
[debug]     removed:Set()
[debug]     added: Set()
[debug]     modified: Set()
[debug] Removed products: Set()
[debug] External API changes: API Changes: Set()
[debug] Modified binary dependencies: Set()
[debug] Initial directly invalidated sources: Set()
[debug] 
[debug] Sources indirectly invalidated by:
[debug]     product: Set()
[debug]     binary dep: Set()
[debug]     external source: Set()
[debug] All initially invalidated sources: Set()
[debug] Copy resource mappings: 
[debug]     
[debug] Other repositories:
[debug]     FileRepository(publish-m2-local,FileConfiguration(true,None),Patterns(ivyPatterns=List(), artifactPatterns=List(/Users/markschaake/.m2/repository/[organisation]/[module](_[scalaVersion])(_[sbtVersion])/[revision]/[artifact]-[revision](-[classifier]).[ext]), isMavenCompatible=true, descriptorOptional=false, skipConsistencyCheck=false))
[debug] Default repositories:
[debug]     Raw(ProjectResolver(inter-project, mapped: ))
[debug]     URLRepository(typesafe-ivy-releases,Patterns(ivyPatterns=List(http://repo.typesafe.com/typesafe/ivy-releases/[organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]), artifactPatterns=List(http://repo.typesafe.com/typesafe/ivy-releases/[organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]), isMavenCompatible=false, descriptorOptional=false, skipConsistencyCheck=false))
[debug]     URLRepository(sbt-plugin-releases,Patterns(ivyPatterns=List(http://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/[organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]), artifactPatterns=List(http://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/[organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]), isMavenCompatible=false, descriptorOptional=false, skipConsistencyCheck=false))
[debug]     FileRepository(local,FileConfiguration(true,None),Patterns(ivyPatterns=List(${ivy.home}/local/[organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]), artifactPatterns=List(${ivy.home}/local/[organisation]/[module]/(scala_[scalaVersion]/)(sbt_[sbtVersion]/)[revision]/[type]s/[artifact](-[classifier]).[ext]), isMavenCompatible=false, descriptorOptional=false, skipConsistencyCheck=false))
[debug]     public: http://repo1.maven.org/maven2/
[debug] Using inline dependencies specified in Scala.
[debug] deducing auto plugins based on known facts Set(Atom(sbt.plugins.CorePlugin)) and clauses Clauses(List(Clause(Atom(sbt.plugins.JvmPlugin),Set(Atom(sbt.plugins.IvyPlugin))), Clause(Atom(sbt.plugins.JUnitXmlReportPlugin),Set(Atom(sbt.plugins.JvmPlugin))), Clause(Atom(sbt.plugins.CorePlugin),Set(Atom(sbt.plugins.IvyPlugin))), Clause(Atom(sbt.plugins.IvyPlugin),Set(Atom(sbt.plugins.JvmPlugin))), Clause(Atom(sbt.plugins.JvmPlugin),Set(Atom(sbt.plugins.JUnitXmlReportPlugin)))))
[debug]   :: deduced result: Matched(sbt.plugins.CorePlugin,sbt.plugins.IvyPlugin,sbt.plugins.JvmPlugin,sbt.plugins.JUnitXmlReportPlugin)
[debug] sorting: ns: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin) not found List(sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin) not found List(sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin) not found List(sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin) not found List()
[debug]   :: sorted deduced result: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[info] Loading project definition from /Users/markschaake/ai2/git/ai2-parsers/project/project
[debug] Running task... Cancel: sbt.TaskCancellationStrategy$Null$@7727d0c5, check cycles: false
[debug] 
[debug] Initial source changes: 
[debug]     removed:Set()
[debug]     added: Set()
[debug]     modified: Set()
[debug] Removed products: Set()
[debug] External API changes: API Changes: Set()
[debug] Modified binary dependencies: Set()
[debug] Initial directly invalidated sources: Set()
[debug] 
[debug] Sources indirectly invalidated by:
[debug]     product: Set()
[debug]     binary dep: Set()
[debug]     external source: Set()
[debug] All initially invalidated sources: Set()
[debug] Copy resource mappings: 
[debug]     
[debug] deducing auto plugins based on known facts Set(Atom(sbt.plugins.CorePlugin)) and clauses Clauses(List(Clause(Atom(sbt.plugins.JvmPlugin),Set(Atom(sbt.plugins.IvyPlugin))), Clause(Atom(sbt.plugins.JUnitXmlReportPlugin),Set(Atom(sbt.plugins.JvmPlugin))), Clause(Atom(sbt.plugins.CorePlugin),Set(Atom(sbt.plugins.IvyPlugin))), Clause(Atom(sbt.plugins.IvyPlugin),Set(Atom(sbt.plugins.JvmPlugin))), Clause(Atom(sbt.plugins.JvmPlugin),Set(Atom(sbt.plugins.JUnitXmlReportPlugin)))))
[debug]   :: deduced result: Matched(sbt.plugins.CorePlugin,sbt.plugins.IvyPlugin,sbt.plugins.JvmPlugin,sbt.plugins.JUnitXmlReportPlugin)
[debug] sorting: ns: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin) not found List(sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin) not found List(sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin) not found List(sbt.plugins.JUnitXmlReportPlugin)
[debug]   :: sorting:: found: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin) not found List()
[debug]   :: sorted deduced result: List(sbt.plugins.CorePlugin, sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.JUnitXmlReportPlugin)
[info] Loading project definition from /Users/markschaake/ai2/git/ai2-parsers/project
[debug] Running task... Cancel: sbt.TaskCancellationStrategy$Null$@7727d0c5, check cycles: false
[debug] 
[debug] Initial source changes: 
[debug]     removed:Set()
[debug]     added: Set()
[debug]     modified: Set()
[debug] Removed products: Set()
[debug] External API changes: API Changes: Set()
[debug] Modified binary dependencies: Set()
[debug] Initial directly invalidated sources: Set()
[debug] 
[debug] Sources indirectly invalidated by:
[debug]     product: Set()
[debug]     binary dep: Set()
[debug]     external source: Set()
[debug] All initially invalidated sources: Set()
[debug] Copy resource mappings: 
[debug]     
sbt.compiler.EvalException: Type error in expression
    at sbt.compiler.Eval.checkError(Eval.scala:343)
    at sbt.compiler.Eval.compileAndLoad(Eval.scala:165)
    at sbt.compiler.Eval.evalCommon(Eval.scala:135)
    at sbt.compiler.Eval.evalDefinitions(Eval.scala:109)
    at sbt.EvaluateConfigurations$.evaluateDefinitions(EvaluateConfigurations.scala:197)
    at sbt.EvaluateConfigurations$.evaluateSbtFile(EvaluateConfigurations.scala:99)
    at sbt.Load$.sbt$Load$$loadSettingsFile$1(Load.scala:507)
    at sbt.Load$$anonfun$sbt$Load$$memoLoadSettingsFile$1$1.apply(Load.scala:502)
    at sbt.Load$$anonfun$sbt$Load$$memoLoadSettingsFile$1$1.apply(Load.scala:501)
    at scala.Option.getOrElse(Option.scala:120)
    at sbt.Load$.sbt$Load$$memoLoadSettingsFile$1(Load.scala:501)
    at sbt.Load$$anonfun$loadSettings$1$2.apply(Load.scala:500)
    at sbt.Load$$anonfun$loadSettings$1$2.apply(Load.scala:500)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
    at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
    at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
    at scala.collection.AbstractTraversable.map(Traversable.scala:105)
    at sbt.Load$.loadSettings$1(Load.scala:500)
    at sbt.Load$.sbt$Load$$expand$1(Load.scala:523)
    at sbt.Load$.loadSettings(Load.scala:528)
    at sbt.Load$.sbt$Load$$loadSbtFiles$1(Load.scala:464)
    at sbt.Load$.defaultLoad$1(Load.scala:475)
    at sbt.Load$.loadTransitive(Load.scala:478)
    at sbt.Load$.loadProjects$1(Load.scala:418)
    at sbt.Load$.loadUnit(Load.scala:419)
    at sbt.Load$$anonfun$15$$anonfun$apply$11.apply(Load.scala:256)
    at sbt.Load$$anonfun$15$$anonfun$apply$11.apply(Load.scala:256)
    at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfun$apply$6.apply(BuildLoader.scala:93)
    at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfun$apply$6.apply(BuildLoader.scala:92)
    at sbt.BuildLoader.apply(BuildLoader.scala:143)
    at sbt.Load$.loadAll(Load.scala:312)
    at sbt.Load$.loadURI(Load.scala:264)
    at sbt.Load$.load(Load.scala:260)
    at sbt.Load$.load(Load.scala:251)
    at sbt.Load$.apply(Load.scala:134)
    at sbt.Load$.defaultLoad(Load.scala:37)
    at sbt.BuiltinCommands$.doLoadProject(Main.scala:473)
    at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:467)
    at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:467)
    at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:60)
    at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:60)
    at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:62)
    at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:62)
    at sbt.Command$.process(Command.scala:95)
    at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:100)
    at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:100)
    at sbt.State$$anon$1.process(State.scala:179)
    at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:100)
    at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:100)
    at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
    at sbt.MainLoop$.next(MainLoop.scala:100)
    at sbt.MainLoop$.run(MainLoop.scala:93)
    at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:71)
    at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:66)
    at sbt.Using.apply(Using.scala:25)
    at sbt.MainLoop$.runWithNewLog(MainLoop.scala:66)
    at sbt.MainLoop$.runAndClearLast(MainLoop.scala:49)
    at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:33)
    at sbt.MainLoop$.runLogged(MainLoop.scala:25)
    at sbt.StandardMain$.runManaged(Main.scala:57)
    at sbt.xMain.run(Main.scala:29)
    at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:109)
    at xsbt.boot.Launch$.withContextLoader(Launch.scala:129)
    at xsbt.boot.Launch$.run(Launch.scala:109)
    at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:36)
    at xsbt.boot.Launch$.launch(Launch.scala:117)
    at xsbt.boot.Launch$.apply(Launch.scala:19)
    at xsbt.boot.Boot$.runImpl(Boot.scala:44)
    at xsbt.boot.Boot$.main(Boot.scala:20)
    at xsbt.boot.Boot.main(Boot.scala)

Answer 1

Turns out the problem had to do with publishing to Sonatype snapshots repository and how SBT resolved the plugins.

I followed the recommendation from the official SBT documentation to publish to Bintray instead. I'm also only publishing releases (and not snapshots). Now everything works fine.

Update: a simple workaround is to add a dependency override for the SBT version in your project/pugins.sbt:

// project/plugins.sbt
dependencyOverrides += "org.scala-sbt" % "sbt" % "0.13.7"

Note: the version you provide should be the same as what is in your project/build.properties file.

Answer 2

Removing the ivy2 cache files work for me:

rm -r ~/.ivy2/

reference: https://github.com/scalapb/ScalaPB/issues/89