Move ensure_newline() into its own file as we need to source it from different places

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

advanced/Scripts/utils.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+# Pi-hole: A black hole for Internet advertisements
+# (c) 2020 Pi-hole, LLC (https://pi-hole.net)
+# Network-wide ad blocking via your own hardware.
+#
+# Controller for all pihole scripts and functions.
+#
+# This file is copyright under the latest version of the EUPL.
+# Please see LICENSE file for your rights under this license.
+
+# Ensure there is a newline at the end of the file passed as argument
+ensure_newline() {
+  # Check if the last line of the passed file is empty, if not, append a newline
+  # to the file to ensure we can append new content safely using echo "" >>
+  # later on
+  [ -n "$(tail -c1 "${1}")" ] && printf '\n' >> "${1}"
+  # There was also the suggestion of using a sed-magic call here, however, this
+  # had the drawback to updating all the file timestamps whenever the sed was
+  # run. This solution only updates the timestamp when actually appending a
+  # newline
+}

advanced/Scripts/webpage.sh

@@ -26,6 +26,9 @@ readonly PI_HOLE_FILES_DIR="/etc/.pihole"
 PH_TEST="true"
 source "${PI_HOLE_FILES_DIR}/automated install/basic-install.sh"
 
+# ensure_newline()
+source "utils.sh"
+
 coltable="/opt/pihole/COL_TABLE"
 if [[ -f ${coltable} ]]; then
     source ${coltable}

pihole

@@ -20,17 +20,8 @@ PI_HOLE_BIN_DIR="/usr/local/bin"
 readonly colfile="${PI_HOLE_SCRIPT_DIR}/COL_TABLE"
 source "${colfile}"
 
-# Ensure there is a newline at the end of the file passed as argument
-ensure_newline() {
-  # Check if the last line of the passed file is empty, if not, append a newline
-  # to the file to ensure we can append new content safely using echo "" >>
-  # later on
-  [ -n "$(tail -c1 "${1}")" ] && printf '\n' >> "${1}"
-  # There was also the suggestion of using a sed-magic call here, however, this
-  # had the drawback to updating all the file timestamps whenever the sed was
-  # run. This solution only updates the timestamp when actually appending a
-  # newline
-}
+# ensure_newline()
+source "utils.sh"
 
 webpageFunc() {
   source "${PI_HOLE_SCRIPT_DIR}/webpage.sh"