Add plugin's plugin dependency as plugin dependency of user - plugins

Question

I am creating an SBT plugin to be used in all Scala projects in my company. It is a collection of commonly used SBT plugins and a common configuration that can be shared everywhere. My plugin uses e.g sbt-release: configures credentials, sets a release process, a default publish repository, etc. So I added it as a plugin dependency
project/plugins.sbt:
addSbtPlugin("com.github.gseitz" % "sbt-release" % "1.0.7")
However I'd like to expose this plugin to my users, so they can call sbt release. Currently I have the following code:
build.sbt
sbtPlugin := true
/* common release configuration code */
addSbtPlugin("com.github.gseitz" % "sbt-release" % "1.0.7")
If I remove the last line, my user cannot call sbt release. However I want to avoid declaring the dependency twice. Can I do better?

Answer 1

I went with a different approach, as the configurations didn't even get applied this way, and it also solves the duplication issue. Instead of sbt files, I created Scala files for the plugin and included the required plugin dependencies in build.sbt. This way you don't need to add it to project/plugins.sbt at all.
Example:
build.sbt
sbtPlugin := true
addSbtPlugin("com.github.gseitz" % "sbt-release" % "1.0.7")
src/main/scala/mycompany/MyReleaseConfigPlugin.scala
package mycompany
import sbt._
import Keys._
object MyReleaseConfigPlugin extends AutoPlugin {
override def trigger: PluginTrigger = allRequirements
override def requires = sbtrelease.ReleasePlugin
/* common release configuration code example */
import sbtrelease.ReleasePlugin.autoImport._
import ReleaseTransformations._
override lazy val projectSettings = Seq(
releaseProcess := Seq[ReleaseStep](
checkSnapshotDependencies,
inquireVersions,
runClean,
setReleaseVersion,
commitReleaseVersion,
tagRelease,
publishArtifacts),
releaseIgnoreUntrackedFiles := false,
publishMavenStyle := true,
credentials += Credentials(
"Artifactory Realm",
"artifactory.mycompany.com",
sys.env.get("REPO_USER").getOrElse(""),
sys.env.get("REPO_PASS").getOrElse(""))
)
}