Update heimdalldashboard.sh

tweak update function

ct/heimdalldashboard.sh

@@ -55,6 +55,8 @@ function default_settings() {
 function update_script() {
 header_info
 if [[ ! -d /opt/Heimdall ]]; then msg_error "No ${APP} Installation Found!"; exit; fi
+RELEASE=$(curl -sX GET "https://api.github.com/repos/linuxserver/Heimdall/releases/latest" | awk '/tag_name/{print $4;exit}' FS='[""]')
+if [[ "${RELEASE}" != "$(cat /opt/${APP}_version.txt)" ]] || [[ ! -f /opt/${APP}_version.txt ]]; then
   msg_info "Stopping ${APP}"
   systemctl stop heimdall
   sleep 1
@@ -66,8 +68,8 @@ cp -R /opt/Heimdall/public public-backup
   sleep 1
   msg_ok "Backed up Data"
 
-RELEASE=$(curl -sX GET "https://api.github.com/repos/linuxserver/Heimdall/releases/latest" | awk '/tag_name/{print $4;exit}' FS='[""]')
   msg_info "Updating Heimdall Dashboard to ${RELEASE}"
+  echo "${RELEASE}" >/opt/${APP}_version.txt
   wget -q https://github.com/linuxserver/Heimdall/archive/${RELEASE}.tar.gz
   tar xzf ${RELEASE}.tar.gz
   VER=$(curl -s https://api.github.com/repos/linuxserver/Heimdall/releases/latest | grep "tag_name" | awk '{print substr($2, 3, length($2)-4) }')
@@ -85,11 +87,7 @@ sleep 1
   msg_ok "Restored Data"
 
   msg_info "Cleanup"
-rm -rf ${RELEASE}.tar.gz
-rm -rf Heimdall-${VER}
-rm -rf public-backup
-rm -rf database-backup
-rm -rf Heimdall
+  rm -rf {${RELEASE}.tar.gz,Heimdall-${VER},public-backup,database-backup,Heimdall}
   sleep 1
   msg_ok "Cleaned"
 
@@ -98,6 +96,9 @@ systemctl start heimdall.service
   sleep 2
   msg_ok "Started ${APP}"
   msg_ok "Updated Successfully"
+else
+  msg_ok "No update required.  ${APP} ia already at ${RELEASE}."
+fi
 exit
 }