Move unattended check to the top of the script - exit early if /etc/pihole/pihole.toml file is not found,

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

automated install/basic-install.sh

@@ -167,6 +167,17 @@ for var in "$@"; do
     esac
 done
 
+if [[ "${runUnattended}" == true ]]; then
+    # In order to run an unattended setup, a pre-seeded /etc/pihole/pihole.toml must exist
+    if [[ ! -f "${PI_HOLE_CONFIG_DIR}/pihole.toml" ]]; then
+        printf "  %b Error: \"%s\" not found. Cannot run unattended setup\\n" "${CROSS}" "${PI_HOLE_CONFIG_DIR}/pihole.toml"
+        exit 1
+    fi
+    printf "  %b Performing unattended setup, no dialogs will be displayed\\n" "${INFO}"
+    # also disable debconf-apt-progress dialogs
+    export DEBIAN_FRONTEND="noninteractive"
+fi
+
 # If the color table file exists,
 if [[ -f "${coltable}" ]]; then
     # source it
@@ -2242,15 +2253,6 @@ main() {
         exit 1
     fi
 
-    if [[ "${fresh_install}" == false ]]; then
-        # if it's running unattended,
-        if [[ "${runUnattended}" == true ]]; then
-            printf "  %b Performing unattended setup, no dialogs will be displayed\\n" "${INFO}"
-            # also disable debconf-apt-progress dialogs
-            export DEBIAN_FRONTEND="noninteractive"
-        fi
-    fi
-
     if [[ "${fresh_install}" == true ]]; then
         # Display welcome dialogs
         welcomeDialogs