[fix #472] /etc/default/<package-name> should be shell script setting…

… envars

src/main/resources/com/typesafe/sbt/packager/archetypes/bash-template

@@ -290,11 +290,6 @@ run() {
   exit $exit_code
 }
 
-# Loads a configuration file full of default command line options for this script.
-loadConfigFile() {
-  cat "$1" | sed '/^\#/d'
-}
-
 # Now check to see if it's a good enough version
 # TODO - Check to see if we have a configured default java version, otherwise use 1.6
 java_version_check() { 
@@ -367,7 +362,9 @@ ${{template_declares}}
 # java_cmd is overrode in process_args when -java-home is used
 declare java_cmd=$(get_java_cmd)
 
-# if configuration files exist, prepend their contents to $@ so it can be processed by this runner
-[[ -f "$script_conf_file" ]] && set -- $(loadConfigFile "$script_conf_file") "$@"
+
+# if configuration files exist, source it and use JAVA_OPTS to prepend their contents to $@
+[[ -f "$script_conf_file" ]] && . "$script_conf_file" 
+set -- "$JAVA_OPTS" "$@"
 
 run "$@"

src/main/resources/com/typesafe/sbt/packager/archetypes/etc-default-template

@@ -14,6 +14,7 @@
 # ${{daemon_user}}		daemon user
 # -------------------------------------------------
 
+# Using $JAVA_OPTS envars
 # Setting -Xmx and -Xms in Megabyte
 # -mem 1024
 
@@ -31,4 +32,8 @@
 # -jvm-debug <port>  
 
 # Don't run the java version check
-# -no-version-check
+# -no-version-check
+
+# Example
+# JAVA_OPTS=" -Dpidfile.path=/var/run/${{app_name}}/play.pid $JAVA_OPTS"
+# JAVA_OPTS=" -mem 1024 -Dkey=val -jvm-debug $JAVA_OPTS"