Add CONFIG_STYLE to default config for unambiguous detection of

new-style config. Try to handle un-upgraded config files in
start-dump1090-fa. Always pass --quiet to dump1090-fa.

debian/dump1090-fa.default

@@ -57,3 +57,6 @@ EXTRA_OPTIONS=""
 # If OVERRIDE_OPTIONS is set, only those options are used; all other options
 # in this config file are ignored.
 OVERRIDE_OPTIONS=""
+
+# This is a marker to make it easier for scripts to identify a v6-style config file
+CONFIG_STYLE=6

debian/start-dump1090-fa

@@ -23,6 +23,17 @@ fi
 
 # process options
 
+# if there's no CONFIG_STYLE, infer a version
+if [ -z "$CONFIG_STYLE" ]
+then
+   if [ -n "$RECEIVER_OPTIONS" -o -n "$DECODER_OPTIONS" -o -n "$NET_OPTIONS" -o -n "$JSON_OPTIONS" ]
+   then
+       CONFIG_STYLE=5
+   else
+       CONFIG_STYLE=6
+   fi
+fi
+
 is_slow_cpu() {
     case "$SLOW_CPU" in
         yes) return 0 ;;
@@ -36,7 +47,18 @@ is_slow_cpu() {
     esac
 }
 
-OPTS="--quiet"
+if [ "$CONFIG_STYLE" = "5" ]
+then
+    # old style config file
+    echo "/etc/default/dump1090-fa is using the old config style, please consider updating it" >&2
+    OPTS="$RECEIVER_OPTIONS $DECODER_OPTIONS $NET_OPTIONS $JSON_OPTIONS"
+elif [ -n "$OVERRIDE_OPTIONS" ]
+then
+    # ignore all other settings, use only provided options
+    OPTS="$OVERRIDE_OPTIONS"
+else
+    # build a list of options based on config settings    
+    OPTS=""
 
     if [ "${RECEIVER:-none}" = "none" ]
     then
@@ -78,9 +100,8 @@ if [ -n "$NET_BEAST_OUTPUT_PORTS" ]; then OPTS="$OPTS --net-bo-port $NET_BEAST_O
     if [ -n "$JSON_LOCATION_ACCURACY" ]; then OPTS="$OPTS --json-location-accuracy $JSON_LOCATION_ACCURACY"; fi
 
     if [ -n "$EXTRA_OPTIONS" ]; then OPTS="$OPTS $EXTRA_OPTIONS"; fi
+fi
 
-if [ -n "$OVERRIDE_OPTIONS" ]; then OPTS="$OVERRIDE_OPTIONS"; fi
-
-exec /usr/bin/dump1090-fa $OPTS "$@"
+exec /usr/bin/dump1090-fa --quiet $OPTS "$@"
 # exec failed, do not restart
 exit 64

debian/upgrade-config

@@ -21,13 +21,6 @@ then
     exit 0
 fi
 
-# Use EXTRA_OPTIONS as a marker for a new-style config file
-if grep -q EXTRA_OPTIONS ${OLDCONFIG}
-then
-    echo "$OLDCONFIG seems to already be a new-style config, nothing to upgrade" >&2
-    exit 0
-fi
-
 if [ ! -f $PACKAGECONFIG ]
 then
     echo "$PACKAGECONFIG does not exist, cannot continue" >&2
@@ -60,6 +53,23 @@ EXTRAS_NET_HEARTBEAT="60"
 # read the old config
 . "$OLDCONFIG"
 
+# if there's no CONFIG_STYLE, infer a version
+if [ -z "$CONFIG_STYLE" ]
+then
+   if [ -n "$RECEIVER_OPTIONS" -o -n "$DECODER_OPTIONS" -o -n "$NET_OPTIONS" -o -n "$JSON_OPTIONS" ]
+   then
+       CONFIG_STYLE=5
+   else
+       CONFIG_STYLE=6
+   fi
+fi
+
+if [ "$CONFIG_STYLE" = "6" ]
+then
+    echo "$OLDCONFIG seems to already be a new-style config, nothing to upgrade" >&2
+    exit 0
+fi
+
 # process all the options from the old config file and accumulate settings in env vars
 process_options() {
     while [ $# -gt 0 ]