Set versions in /etc/pihole/versions to null if script fails

Signed-off-by: Christian König <github@yubiuser.dev>

advanced/Scripts/updatecheck.sh

@@ -10,32 +10,32 @@
 
 function get_local_branch() {
     # Return active branch
-    cd "${1}" 2>/dev/null || return 1
-    git rev-parse --abbrev-ref HEAD || return 1
+    cd "${1}" 2>/dev/null || { echo "null"; return; }
+    git rev-parse --abbrev-ref HEAD || echo "null"
 }
 
 function get_local_version() {
     # Return active version
-    cd "${1}" 2>/dev/null || return 1
-    git describe --tags --always 2>/dev/null || return 1
+    cd "${1}" 2>/dev/null || { echo "null"; return; }
+    git describe --tags --always 2>/dev/null || echo "null"
 }
 
 function get_local_hash() {
-    cd "${1}" 2>/dev/null || return 1
-    git rev-parse --short=8 HEAD || return 1
+    cd "${1}" 2>/dev/null || { echo "null"; return; }
+    git rev-parse --short=8 HEAD || echo "null"
 }
 
 function get_remote_version() {
     # if ${2} is = "master" we need to use the "latest" endpoint, otherwise, we simply return null
     if [[ "${2}" == "master" ]]; then
-        curl -s "https://api.github.com/repos/pi-hole/${1}/releases/latest" 2>/dev/null | jq --raw-output .tag_name || return 1
+        curl -s "https://api.github.com/repos/pi-hole/${1}/releases/latest" 2>/dev/null | jq --raw-output .tag_name || echo "null"
     else
         echo "null"
     fi
 }
 
 function get_remote_hash() {
-    git ls-remote "https://github.com/pi-hole/${1}" --tags "${2}" | awk '{print substr($0, 1,8);}' || return 1
+    git ls-remote "https://github.com/pi-hole/${1}" --tags "${2}" | awk '{print substr($0, 1,8);}' || echo "null"
 }
 
 # Source the utils file for addOrEditKeyValPair()