Add addApp function to align with bash version (#1339)

Co-authored-by: Nepomuk Seiler <muuki88@users.noreply.github.com>

src/main/resources/com/typesafe/sbt/packager/archetypes/scripts/ash-template

@@ -32,6 +32,10 @@ addJava () {
   java_opts="$java_opts $1"
 }
 
+addApp () {
+  app_commands="$app_commands $1"
+}
+
 addResidual () {
   residual_args="$residual_args \"$1\""
 }
@@ -91,6 +95,7 @@ process_args () {
   fi
 }
 
+app_commands=""
 residual_args=""
 real_script_path="$(realpath "$0")"
 app_home="$(realpath "$(dirname "$real_script_path")")"
@@ -107,4 +112,4 @@ java_cmd="$(get_java_cmd)"
 # If a configuration file exist, read the contents to $opts
 [ -f "$script_conf_file" ] && opts=$(loadConfigFile "$script_conf_file")
 
-eval "exec $java_cmd $java_opts -classpath $app_classpath $opts $app_mainclass $residual_args"
+eval "exec $java_cmd $java_opts -classpath $app_classpath $opts $app_mainclass $app_commands $residual_args"

src/sbt-test/ash/add-app-settings/build.sbt

@@ -0,0 +1,23 @@
+enablePlugins(JavaAppPackaging, AshScriptPlugin)
+
+name := "simple-app"
+
+version := "0.1.0"
+
+bashScriptExtraDefines ++= Seq("""addApp "info"""", """addApp "help"""")
+
+TaskKey[Unit]("scriptCheck") := {
+  val startScript = (stagingDirectory in Universal).value / "bin" / executableScriptName.value
+  val options = IO.read(startScript)
+  assert(options contains """addApp "info"""", "Script doesn't contain app setting:\n" + options)
+  assert(options contains """addApp "help"""", "Script doesn't contain app setting:\n" + options)
+}
+
+TaskKey[Unit]("runCheck") := {
+  val cwd = (stagingDirectory in Universal).value
+  val cmd = Seq((cwd / "bin" / packageName.value).getAbsolutePath)  
+  val output = (sys.process.Process(cmd, cwd).!!).replaceAll("\n", "")
+
+  assert(output.contains("info"), s"Application did not receive residual arg 'info'")
+  assert(output.contains("help"), s"Application did not receive residual arg 'help'")
+}

src/sbt-test/ash/add-app-settings/project/plugins.sbt

@@ -0,0 +1 @@
+addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % sys.props("project.version"))

src/sbt-test/ash/add-app-settings/src/main/scala/MainApp.scala

@@ -0,0 +1,3 @@
+object MainApp extends App {  
+  println(args.mkString("|"))
+}

src/sbt-test/ash/add-app-settings/test

@@ -0,0 +1,5 @@
+# Run the staging and check the script.
+> stage
+$ exists target/universal/stage/bin/simple-app
+> scriptCheck
+> runCheck