Systemd mark file as non config (#1351)

* systemd-mark-file-as-non-config: Add configuration paramets to escape marking app_name.service as config.

* systemd-mark-file-as-non-config: Change docs.

src/main/scala/com/typesafe/sbt/packager/archetypes/systemloader/SystemdPlugin.scala

@@ -34,6 +34,8 @@ object SystemdPlugin extends AutoPlugin {
   object autoImport {
     val systemdSuccessExitStatus =
       settingKey[Seq[String]]("SuccessExitStatus property")
+    val systemdIsServiceFileConfig =
+      settingKey[Boolean]("Make app_name.service file as config.")
   }
 
   import autoImport._
@@ -51,12 +53,13 @@ object SystemdPlugin extends AutoPlugin {
     requiredStopFacilities := Some("network.target"),
     systemdSuccessExitStatus := Seq.empty,
     linuxStartScriptName := Some(packageName.value + ".service"),
+    systemdIsServiceFileConfig := true,
     // add systemloader to mappings
     linuxPackageMappings ++= startScriptMapping(
       linuxStartScriptName.value,
       linuxMakeStartScript.value,
       defaultLinuxStartScriptLocation.value,
-      isConf = true
+      systemdIsServiceFileConfig.value
     ),
     // add additional system configurations to script replacements
     linuxScriptReplacements += ("SuccessExitStatus" -> systemdSuccessExitStatus.value.mkString(" ")),

src/sphinx/archetypes/systemloaders.rst

@@ -80,6 +80,10 @@ Settings
     termination, in addition to the normal successful exit code ``0`` and the signals ``SIGHUP``, ``SIGINT``,
     ``SIGTERM``, and ``SIGPIPE``. Exit status definitions can either be numeric exit codes or termination signal names.
 
+  ``systemdIsServiceFileConfig``
+    Should file app_name.service be marked as config. Default is ``true``. If it is set to ``true``, file will be
+    marked ``%config`` in rpm package for example.
+
 Upstart
 -------