Adds addMavenResolverPlugin. #1808/#1793

build.sbt

@@ -468,8 +468,7 @@ def otherRootSettings = Seq(
   Scripted.scriptedPrescripted := { f =>
     val inj = f / "project" / "maven.sbt"
     if (!inj.exists) {
-      IO.write(inj, """libraryDependencies += Defaults.sbtPluginExtra("org.scala-sbt" % "sbt-maven-resolver" % sbtVersion.value,
-        |sbtBinaryVersion.value, scalaBinaryVersion.value)""".stripMargin)
+      IO.write(inj, "addMavenResolverPlugin")
       // sLog.value.info(s"""Injected project/maven.sbt to $f""")
     }
   }

main/src/main/scala/sbt/Defaults.scala

@@ -1778,6 +1778,12 @@ trait BuildExtra extends BuildCommon with DefExtra {
       Seq(compose(onLoad, add), compose(onUnload, remove))
     }
 
+  /**
+   * Adds Maven resolver plugin.
+   */
+  def addMavenResolverPlugin: Setting[Seq[ModuleID]] =
+    libraryDependencies += sbtPluginExtra(ModuleID("org.scala-sbt", "sbt-maven-resolver", sbtVersion.value), sbtBinaryVersion.value, scalaBinaryVersion.value)
+
   /**
    * Adds `dependency` as an sbt plugin for the specific sbt version `sbtVersion` and Scala version `scalaVersion`.
    * Typically, use the default values for these versions instead of specifying them explicitly.

notes/0.13.8.markdown

@@ -101,8 +101,7 @@ to resolve Maven dependencies instead of Apache Ivy.
 
 To enable this plugin, add the following to `project/maven.sbt` (or `project/plugin.sbt` the file name doesn't matter):
 
-    libraryDependencies += Defaults.sbtPluginExtra("org.scala-sbt" % "sbt-maven-resolver" % sbtVersion.value,
-      sbtBinaryVersion.value, scalaBinaryVersion.value)
+    addMavenResolverPlugin
 
 This will create a new `~/.ivy2/maven-cache` directory, which contains the Aether cache of files.
 You may notice some file will be re-downloaded for the new cache layout.