Split sbt release in stages?

[todor-kolev]

I have an SBT project and a CD pipeline and what I want is to execute the following sequence of events:

1. Checkout my project from the git repo
2. Tag the commit
3. Run the tests
4. Package my app
5. Now at this point I don't want to release anything yet as I will promote the binaries to another environment to run the end-to-end tests. Only if they complete successfully would I want to push the git tags and upload my artefact to the remote artefactory repository. So I want something similar to this in my build.sbt but I'm not quite sure how exactly to extend the existing release process:

lazy val prepareRelease = settingKey[Seq[ReleaseStep]]("Prepare the release")
prepareRelease := Seq[ReleaseStep](
      checkSnapshotDependencies, 
      inquireVersions,
      runClean,
      runTest,
      setReleaseVersion,
      commitReleaseVersion,
      tagRelease
  )

lazy val doRelease = settingKey[Seq[ReleaseStep]]("Perform the release")
doRelease := Seq[ReleaseStep](
      publishArtifacts,
      setNextVersion,
      commitNextVersion,
      pushChanges
  )

What I want to achieve really is to be able to first run sbt prepereRelease after which I will promote to my TEST environment and later, if everything goes ok, to run sbt doRelease.

Is there a way to achieve this atm?

[todor-kolev]

What I ended up doing it is creating two custom commands and appending the releaseProcess setting to the state object which I then pass onto the release plugin. Not sure if there's a better way of doing the same thing:

// Defines the release process
releaseIgnoreUntrackedFiles := true

commands += Command.command("prepareRelease")((state: State) => {
  println("Preparing release...")
  val extracted = Project extract state
  var st = extracted.append(Seq(releaseProcess := Seq[ReleaseStep](
    runClean,
    checkSnapshotDependencies,
    inquireVersions,
    setReleaseVersion,
    commitReleaseVersion,
    tagRelease,
    runTest,
    releaseStepTask(coverageReport),
    releaseStepTask(dist)
  )), state)
  Command.process("release with-defaults", st)
})

commands += Command.command("completeRelease")((state: State) => {
  println("Completing release...")
  val extracted = Project extract state
  val customState = extracted.append(Seq(releaseProcess := Seq[ReleaseStep](
    inquireVersions,
    setNextVersion,
    commitNextVersion,
    pushChanges
  )), state)
  val newState = Command.process("release with-defaults", customState)
  newState
})