system: uci: Use config dir on uci_add and support add_/del_list

This commit makes three changes to the uci shell library:

* A check for UCI_CONFIG_DIR has been added to the command line when
adding anonymous sections. Without this change, adding anonymous
sections to configs not stored in /etc/config is not possible.

* Support for adding/removing items from lists were missing, so I have
added the functions uci_add_list() and uci_remove_list() to simplify
working with uci lists from scripts.

Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>
[added missing package version bump]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/system/uci/Makefile

@@ -9,7 +9,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=uci
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/uci.git
 PKG_SOURCE_PROTO:=git

package/system/uci/files/lib/config/uci.sh

@@ -85,6 +85,15 @@ uci_set() {
 	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} set "$PACKAGE.$CONFIG.$OPTION=$VALUE"
 }
 
+uci_add_list() {
+	local PACKAGE="$1"
+	local CONFIG="$2"
+	local OPTION="$3"
+	local VALUE="$4"
+
+	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} add_list "$PACKAGE.$CONFIG.$OPTION=$VALUE"
+}
+
 uci_get_state() {
 	uci_get "$1" "$2" "$3" "$4" "/var/state"
 }
@@ -108,7 +117,7 @@ uci_add() {
 	local CONFIG="$3"
 
 	if [ -z "$CONFIG" ]; then
-		export ${NO_EXPORT:+-n} CONFIG_SECTION="$(/sbin/uci add "$PACKAGE" "$TYPE")"
+		export ${NO_EXPORT:+-n} CONFIG_SECTION="$(/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} add "$PACKAGE" "$TYPE")"
 	else
 		/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} set "$PACKAGE.$CONFIG=$TYPE"
 		export ${NO_EXPORT:+-n} CONFIG_SECTION="$CONFIG"
@@ -132,6 +141,15 @@ uci_remove() {
 	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} del "$PACKAGE.$CONFIG${OPTION:+.$OPTION}"
 }
 
+uci_remove_list() {
+	local PACKAGE="$1"
+	local CONFIG="$2"
+	local OPTION="$3"
+	local VALUE="$4"
+
+	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} del_list "$PACKAGE.$CONFIG.$OPTION=$VALUE"
+}
+
 uci_commit() {
 	local PACKAGE="$1"
 	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} commit $PACKAGE