Avoid reactivating a deactivated lighttpd service (#1485)

* Do not activate disabled lighttpd upon update

* Fixes #1362

* Use systemctl when available

* Move `finalexports` to the very end of the install script
set value of LIGHTTPD_ENABLED to 1 or 0 depending on whether or not lighttpd is enabled or disabled.
actually save LIGHTTPD_ENABLED value to setupvars.conf

Signed-off-by: Adam Warner <adamw@rner.email>

* add [[ -z "${LIGHTTPD_ENABLED}" ]] back in!

Signed-off-by: Adam Warner <adamw@rner.email>

* Ensure "Loaded:" is the line being checked

* Colourise disabled lighttpd message

* Prevent disabled lighttpd triggering error

* change of plan, don't need that [[ -z "${LIGHTTPD_ENABLED}" ]]

Signed-off-by: Adam Warner <adamw@rner.email>

automated install/basic-install.sh

@@ -1485,8 +1485,7 @@ finalExports() {
 
   # If the setup variable file exists,
   if [ -e "${setupVars}" ]; then
-    # update the variables in the file
-    sed -i.update.bak '/PIHOLE_INTERFACE/d;/IPV4_ADDRESS/d;/IPV6_ADDRESS/d;/PIHOLE_DNS_1/d;/PIHOLE_DNS_2/d;/QUERY_LOGGING/d;/INSTALL_WEB/d;' "${setupVars}"
+    sed -i.update.bak '/PIHOLE_INTERFACE/d;/IPV4_ADDRESS/d;/IPV6_ADDRESS/d;/PIHOLE_DNS_1/d;/PIHOLE_DNS_2/d;/QUERY_LOGGING/d;/INSTALL_WEB/d;/LIGHTTPD_ENABLED/d;' "${setupVars}"
   fi
   # echo the information to the user
     {
@@ -1497,6 +1496,7 @@ finalExports() {
   echo "PIHOLE_DNS_2=${PIHOLE_DNS_2}"
   echo "QUERY_LOGGING=${QUERY_LOGGING}"
   echo "INSTALL_WEB=${INSTALL_WEB}"
+  echo "LIGHTTPD_ENABLED=${LIGHTTPD_ENABLED}"
     }>> "${setupVars}"
 
   # Look for DNS server settings which would have to be reapplied
@@ -1585,9 +1585,6 @@ installPihole() {
   FTLdetect || echo -e "  ${CROSS} FTL Engine not installed."
   # Configure the firewall
   configureFirewall
-  # Run the final exports
-  finalExports
-  #runGravity
 }
 
 # At some point in the future this list can be pruned, for now we'll need it to ensure updates don't break.
@@ -1621,8 +1618,8 @@ updatePihole() {
   installLogrotate
   # Detect if FTL is installed
   FTLdetect || echo -e "  ${CROSS} FTL Engine not installed."
-  finalExports #re-export setupVars.conf to account for any new vars added in new versions
-  #runGravity
+
+
 }
 
 
@@ -2052,10 +2049,24 @@ main() {
   enable_service dnsmasq
 
   # If the Web server was installed,
-  if [[ ${INSTALL_WEB} == true ]]; then
-    # enable it
-    start_service lighttpd
-    enable_service lighttpd
+  if [[ "${INSTALL_WEB}" == true ]]; then
+    # Check to see if lighttpd was already set to run on reboot
+    if [[ "${useUpdateVars}" == true ]]; then
+      if [[ -x "$(command -v systemctl)" ]]; then
+        # Value will either be 1, if true, or 0
+        LIGHTTPD_ENABLED=$(systemctl is-enabled lighttpd | grep -c 'enabled' || true)
+      else
+        # Value will either be 1, if true, or 0
+        LIGHTTPD_ENABLED=$(service lighttpd status | awk '/Loaded:/ {print $0}' | grep -c 'enabled' || true)
+      fi
+    fi
+
+    if [[ "${LIGHTTPD_ENABLED}" == "1" ]]; then
+      start_service lighttpd
+      enable_service lighttpd
+    else
+      echo -e "  ${INFO} Lighttpd is disabled, skipping service restart"
+    fi
   fi
 
   # Download and compile the aggregated block list
@@ -2103,6 +2114,8 @@ main() {
   # Display where the log file is
   echo -e "\n  ${INFO} The install log is located at: /etc/pihole/install.log
   ${COL_LIGHT_GREEN}${INSTALL_TYPE} Complete! ${COL_NC}"
+  #update setupvars.conf with any variables that may or may not have been changed during the install
+  finalExports
 }
 
 #