Using custom postinst script with JavaServerAppPackaging overrides maintainer one

[Tolsi]

Here in docs written: If you use the packageArchetype.java_server there are predefined postinst and preinst files, which start/stop the application on install/remove calls. Existing maintainer scripts will be extended not overridden.

packageArchetype.java_server is deprecated, i use enablePlugins(JavaServerAppPackaging), but my src/debian/DEBIAN/postinst overrides exists maintainer postinst script.

How I can extend the maintainer postinst?

[muuki88]

sorry for the late reply. We are planning to align rpm/debian so both use a simple api where you can extend/override existing scripts in the same fashion. For now you have to do a bit sbt-foo.

// extending the postinst script
debianMakePostinstScript := {
  // you can actually place it anywhere
  val tmp = (target in Universal).value / "tmp" / "bin"

  // get the preexisting one or create a new
  val postinst = debianMakePostinstScript.value.getOrElse(tmp / "postinst")

  // write stuff
  IO.write(postinst, """echo "nice one!"""", append = true)
  Some(postinst)
}

I have not tested this, but should work.