Override postinst scriptlet to not start service and register it

Question

I'm using SBT native packager 1.2.0-M3 for packaging a Play Framework 2.5.3 application as an RPM (targeted for RHEL 7 with systemd). I would like to change the behavior of the generated RPM such that it does NOT automatically start after install but is being enabled (systemctl enable <name>.service).

I've been following the instructions outlined at http://www.scala-sbt.org/sbt-native-packager/archetypes/java_server/customize.html. Specifically, I created a file src/rpm/scriptlets/post-rpm containing a single line systemctl enable <name>.service. As far as I understand the documentation, that's all that is required. However, on installation of the RPM the service gets still automatically started. Is there any additional configuration required?

Answer 1

This is currently the default behaviour. There is a historical explanation here.

What you actually need to do are the maintainerScripts in Rpm. There is a helper trait which lightens the build definition. Something like

 import RpmConstants._
 maintainerScripts in Rpm := {
     (maintainerScripts in Rpm).value += (
         Post -> "systemctl enable <name>.service"
      )
 }

And there is a feature request to implement this in native-packager directly.