Big rearrangement to add debconf support.

/etc/default/dump1090-mutability is now generated in postinst,
if it doesn't exist, from a template in /usr/share/dump1090-mutability.
Subsequently, the config file is updated in place if debconf-driven
changes are made.

Static HTML/javascript have moved to a "html" subdir to avoid exposing
the template via the webserver.

debian/dump1090-mutability.postinst

@@ -17,10 +17,85 @@ set -e
 # for details, see http://www.debian.org/doc/debian-policy/ or
 # the debian-policy package
 
+NAME=dump1090-mutability
+CONFIGFILE=/etc/default/$NAME
+TEMPLATECONFIG=/usr/share/$NAME/config-template
+SEDSCRIPT=$CONFIGFILE.sed.tmp
+
+subvar_raw() {
+  # $1 = db var value
+  # $2 = config var name
+
+  # if not present in the config file, add it
+  test -z "$1" || grep -Eq "^ *$2=" $CONFIGFILE || echo "$2=" >> $CONFIGFILE
+  # add to the sedscript
+  echo "s@^ *$2=.*@$2=\"$1\"@" >>$SEDSCRIPT
+}
+
+subvar() {
+  # $1 = db var name
+  # $2 = config var name
+  db_get $NAME/$1
+  subvar_raw "$RET" "$2"
+}
+
+subvar_yn() {
+  # $1 = db var name
+  # $2 = config var name
+  db_get $NAME/$1
+  if [ "$RET" = "true" ]; then subvar_raw "yes" "$2"; else subvar_raw "no" "$2"; fi
+}
 
 case "$1" in
     configure)
-        adduser --system --home /usr/share/dump1090-mutability --no-create-home --quiet dump1090
+        . /usr/share/debconf/confmodule
+
+        # Generate config file, if it doesn't exist.
+        if [ ! -e $CONFIGFILE ]; then
+            tail -n +4 $TEMPLATECONFIG >$CONFIGFILE
+        fi
+
+        rm -f $SEDSCRIPT
+
+        subvar_yn auto-start START_DUMP1090
+        subvar run-as-user DUMP1090_USER
+        subvar log-file LOGFILE
+        subvar rtlsdr-device DEVICE
+        subvar rtlsdr-gain GAIN
+        subvar rtlsdr-ppm PPM
+        subvar_yn rtlsdr-oversample OVERSAMPLE
+        subvar_yn decode-fixcrc FIX_CRC
+        subvar_yn decode-phase-enhance PHASE_ENHANCE
+        subvar_yn decode-aggressive AGGRESSIVE
+        subvar decode-lat LAT
+        subvar decode-lon LON
+        subvar net-http-port HTTP_PORT
+        subvar net-ri-port RAW_INPUT_PORT
+        subvar net-ro-port RAW_OUTPUT_PORT
+        subvar net-bi-port BEAST_INPUT_PORT
+        subvar net-bo-port BEAST_OUTPUT_PORT
+        subvar net-sbs-port SBS_OUTPUT_PORT
+        subvar net-fatsv-port FATSV_OUTPUT_PORT
+        subvar net-heartbeat NET_HEARTBEAT
+        subvar net-out-size NET_OUTPUT_SIZE
+        subvar net-out-interval NET_OUTPUT_INTERVAL
+        subvar net-buffer NET_BUFFER
+        subvar net-bind-address NET_BIND_ADDRESS
+        subvar stats-interval STATS_INTERVAL
+        subvar json-dir JSON_DIR
+        subvar json-interval JSON_INTERVAL
+        subvar extra-args EXTRA_ARGS
+
+        cp -a -f $CONFIGFILE $CONFIGFILE.tmp
+        sed -f $SEDSCRIPT < $CONFIGFILE > $CONFIGFILE.tmp
+        mv -f $CONFIGFILE.tmp $CONFIGFILE
+        #rm $SEDSCRIPT
+
+        db_get $NAME/auto-start
+        if [ "$RET" = "true" ]; then
+          db_get $NAME/run-as-user
+          adduser --system --home /usr/share/$NAME --no-create-home --quiet "$RET"
+        fi
     ;;
 
     abort-upgrade|abort-remove|abort-deconfigure)
@@ -37,4 +112,5 @@ esac
 
 #DEBHELPER#
 
+if [ "$1" = "configure" ]; then db_stop; fi
 exit 0