Add --nuke option to list.sh that can be used e.g. by Teleporter to empty out lists before importing new content

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/list.sh

@@ -49,7 +49,8 @@ Options:
   -nr, --noreload     Update ${type}list without refreshing dnsmasq
   -q, --quiet         Make output less verbose
   -h, --help          Show this help dialog
-  -l, --list          Display all your ${type}listed domains"
+  -l, --list          Display all your ${type}listed domains
+  --nuke              Removes all entries in a list"
 
   exit 0
 }
@@ -70,7 +71,7 @@ HandleOther() {
     validDomain=$(grep -P "^((-|_)*[a-z\d]((-|_)*[a-z\d])*(-|_)*)(\.(-|_)*([a-z\d]((-|_)*[a-z\d])*))*$" <<< "${domain}") # Valid chars check
     validDomain=$(grep -P "^[^\.]{1,63}(\.[^\.]{1,63})*$" <<< "${validDomain}") # Length of each label
   fi
-  
+
   if [[ -n "${validDomain}" ]]; then
     domList=("${domList[@]}" ${validDomain})
   else
@@ -223,6 +224,12 @@ Displaylist() {
   exit 0;
 }
 
+NukeList() {
+  if [[ -f "${listMain}" ]]; then
+    echo "" > "${listMain}"
+  fi
+}
+
 for var in "$@"; do
   case "${var}" in
     "-w" | "whitelist"   ) listMain="${whitelist}"; listAlt="${blacklist}";;
@@ -234,6 +241,7 @@ for var in "$@"; do
     "-q" | "--quiet"     ) verbose=false;;
     "-h" | "--help"      ) helpFunc;;
     "-l" | "--list"      ) Displaylist;;
+    "--nuke"             ) NukeList;;
     *                    ) HandleOther "${var}";;
   esac
 done