Allow to overload global functions with local functions stored in the config tree at scripts/functions.

live-helper 1.0.6 will be the last release of live-helper 1.x, which will
produce lenny 5.0.3 release images. However, when 5.0.4 is due, we'll need
to produce new images with slightly modified functions/release.sh files.
In order to acchieve that, we'll allow to have such a file overload the
functions shipped in live-helper.

This way, we can acchieve that:

  * live-helper itself doesn't need to be updated through stable updates
    anymore.
  * we still can do the required changes for a new point release.
  * we even ship the changes in the source tarballs automatically.

functions.sh

@@ -2,7 +2,17 @@
 
 LH_BASE="${LH_BASE:-/usr/share/live-helper}"
 
+# Source global functions
 for FUNCTION in "${LH_BASE}"/functions/*.sh
 do
 	. "${FUNCTION}"
 done
+
+# Source local functions
+if [ -d scripts/functions ]
+then
+	for FUNCTION in scripts/functions/*.sh
+	do
+		. "${FUNCTION}"
+	done
+fi

helpers/lh_config

@@ -210,6 +210,11 @@ Local_arguments ()
 					rmdir --ignore-fail-on-non-empty config
 				fi
 
+				if [ -d scripts/functions ]
+				then
+					rmdir --ignore-fail-on-non-empty scripts/functions
+				fi
+
 				if [ -d scripts ]
 				then
 					rmdir --ignore-fail-on-non-empty scripts