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How can I use the sbt plugin as a dependency in a multi-project build?

I have two sbt plugin projects that use multi-project builds. I would like to use one of the plugins as a dependency for the other. I was able to get this working with separate builds of projects, but as soon as I move on to multi-project builds, I cannot get the dependencies to communicate correctly.

my test plugin

build.sbt

lazy val commonSettings = Seq(
    organization := "com.example",
    name := "my-test-plugin",
    version := "0.1.0-SNAPSHOT",
    scalaVersion := "2.10.5"
)

// The contents of root are largely unimportant here
lazy val root = (project in file(".")).settings(commonSettings: _*)

lazy val plugin = (project in file("plugin"))
    .settings(commonSettings: _*)
    .settings(
        sbtPlugin := true
    )

my test plugin / plugin / src / main / scala / PluginTest.scala

package com.example.test

// Sample code I would like to access from another plugin
object PluginTest {
    def foo: Unit = println("test")
}

my-sub-plugin

build.sbt

lazy val commonSettings = Seq(
    organization := "com.sample",
    name := "my-sub-plugin",
    version := "0.1.0-SNAPSHOT",
    scalaVersion := "2.10.5"
)

lazy val root = (project in file(".")).settings(commonSettings: _*)

lazy val plugin = (project in file("plugin"))
    .settings(commonSettings: _*)
    .settings(
        sbtPlugin := true,
        libraryDependencies += Defaults.sbtPluginExtra("com.example" % "my-test-plugin" % "0.1.0-SNAPSHOT", "0.13", "2.10")
    ).dependsOn(root)

my-sub-plugin / plugin / src / main / scala / SubPluginTest.scala

package com.sample.test

object SubPluginTest {
    def bar = com.example.test.PluginTest.foo
}

But the last file does not compile:

[error] /home/mike/code/sbt-tests/my-sub-plugin/plugin/src/main/scala/SubPluginTest.scala:4: object example is not a member of package com
[error]     def bar = com.example.test.PluginTest.foo
[error]                   ^

publish-local plugin/publish-local ( ), , SubPlugintest.scala , . , root ( vals -, build.sbt), .

?

, 0.13.5 0.13.8. sbtPluginExtra plugins.sbt ( , , ).

Edit:

:

$ jar tf ~/.ivy2/local/com.example/my-test-plugin/scala_2.10/sbt_0.13/0.1.0-SNAPSHOT/jars/my-test-plugin.jar
META-INF/MANIFEST.MF
com/
com/example/
com/example/test/
com/example/test/PluginTest$.class
com/example/test/PluginTest.class

$ jar tf ~/.ivy2/local/com.example/my-test-plugin_2.10/0.1.0-SNAPSHOT/jars/my-test-plugin_2.10.jar
META-INF/MANIFEST.MF
com/
com/example/
com/example/test/
com/example/test/DummyCode.class
com/example/test/DummyCode$.class
0
1

name :

-

> ;show root/name ;show plugin/name
[info] my-test-plugin
[info] my-test-plugin

--

> ;show root/name ;show plugin/name
[info] my-sub-plugin
[info] my-sub-plugin

, my-test-plugin :

> ;root/publishLocal ;plugin/publishLocal
[info] Wrote /Users/dnw/Desktop/sbt-tests/my-test-plugin/target/scala-2.10/my-test-plugin_2.10-0.1.0-SNAPSHOT.pom
[info] :: delivering :: com.example#my-test-plugin_2.10;0.1.0-SNAPSHOT :: 0.1.0-SNAPSHOT :: integration :: Sat Apr 11 09:16:15 BST 2015
[info]  delivering ivy file to /Users/dnw/Desktop/sbt-tests/my-test-plugin/target/scala-2.10/ivy-0.1.0-SNAPSHOT.xml
[info]  published my-test-plugin_2.10 to /Users/dnw/.ivy2/local/com.example/my-test-plugin_2.10/0.1.0-SNAPSHOT/poms/my-test-plugin_2.10.pom
[info]  published my-test-plugin_2.10 to /Users/dnw/.ivy2/local/com.example/my-test-plugin_2.10/0.1.0-SNAPSHOT/jars/my-test-plugin_2.10.jar
[info]  published my-test-plugin_2.10 to /Users/dnw/.ivy2/local/com.example/my-test-plugin_2.10/0.1.0-SNAPSHOT/srcs/my-test-plugin_2.10-sources.jar
[info]  published my-test-plugin_2.10 to /Users/dnw/.ivy2/local/com.example/my-test-plugin_2.10/0.1.0-SNAPSHOT/docs/my-test-plugin_2.10-javadoc.jar
[info]  published ivy to /Users/dnw/.ivy2/local/com.example/my-test-plugin_2.10/0.1.0-SNAPSHOT/ivys/ivy.xml
[success] Total time: 0 s, completed 11-Apr-2015 09:16:15
[info] Wrote /Users/dnw/Desktop/sbt-tests/my-test-plugin/plugin/target/scala-2.10/sbt-0.13/my-test-plugin-0.1.0-SNAPSHOT.pom
[info] :: delivering :: com.example#my-test-plugin;0.1.0-SNAPSHOT :: 0.1.0-SNAPSHOT :: integration :: Sat Apr 11 09:16:15 BST 2015
[info]  delivering ivy file to /Users/dnw/Desktop/sbt-tests/my-test-plugin/plugin/target/scala-2.10/sbt-0.13/ivy-0.1.0-SNAPSHOT.xml
[info]  published my-test-plugin to /Users/dnw/.ivy2/local/com.example/my-test-plugin/scala_2.10/sbt_0.13/0.1.0-SNAPSHOT/poms/my-test-plugin.pom
[info]  published my-test-plugin to /Users/dnw/.ivy2/local/com.example/my-test-plugin/scala_2.10/sbt_0.13/0.1.0-SNAPSHOT/jars/my-test-plugin.jar
[info]  published my-test-plugin to /Users/dnw/.ivy2/local/com.example/my-test-plugin/scala_2.10/sbt_0.13/0.1.0-SNAPSHOT/srcs/my-test-plugin-sources.jar
[info]  published my-test-plugin to /Users/dnw/.ivy2/local/com.example/my-test-plugin/scala_2.10/sbt_0.13/0.1.0-SNAPSHOT/docs/my-test-plugin-javadoc.jar
[info]  published ivy to /Users/dnw/.ivy2/local/com.example/my-test-plugin/scala_2.10/sbt_0.13/0.1.0-SNAPSHOT/ivys/ivy.xml
[success] Total time: 0 s, completed 11-Apr-2015 09:16:15

:

com.example/my-test-plugin_2.10/0.1.0-SNAPSHOT/jars/my-test-plugin_2.10.jar
com.example/my-test-plugin/scala_2.10/sbt_0.13/0.1.0-SNAPSHOT/jars/my-test-plugin.jar
  • -sbt- my-test-plugin, Scala 2.10.
  • sbt-plugin, my-test-plugin, - Scala 2.10 sbt 0.13.

my-test-plugin my-sub-plugin:

[error] Modules were resolved with conflicting cross-version suffixes in {file:/Users/dnw/Desktop/sbt-tests/my-sub-plugin/}root:
[error]    com.example:my-test-plugin <none>, _2.10
java.lang.RuntimeException: Conflicting cross-version suffixes in: com.example:my-test-plugin
    at scala.sys.package$.error(package.scala:27)
    at sbt.ConflictWarning$.processCrossVersioned(ConflictWarning.scala:46)
    at sbt.ConflictWarning$.apply(ConflictWarning.scala:32)

, .

+2

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