test for existing prior to restarting NetworkManager; include sleep after restart for devices which reset WiFi connection on restart

installer.sh

@@ -95,25 +95,41 @@ if [[ "$(sysctl --values kernel.dmesg_restrict)" != "0" ]]; then
 fi
 
 # Create config for NetworkManager
+tmp=$(mktemp)
+curl -sL "${URL_NM_CONF}" -o ${tmp}
+if [ $(diff ${tmp} ${FILE_NM_CONF} | wc -c) -gt 0 ]; then
   info "Creating NetworkManager configuration"
-curl -sL "${URL_NM_CONF}" > "${FILE_NM_CONF}"
+  mv -f ${tmp} "${FILE_NM_CONF}"
   if [ ! -f "$FILE_NM_CONNECTION" ]; then
     curl -sL "${URL_NM_CONNECTION}" > "${FILE_NM_CONNECTION}"
   fi
+  nmrestart='true'
+fi
+rm -f ${tmp}
 
+tmp=$(mktemp)
+curl -sL "${URL_INTERFACES}" -o ${tmp}
+if [ $(diff ${tmp} ${FILE_INTERFACES} | wc -c) -gt 0 ]; then
   warn "Changes are needed to the /etc/network/interfaces file"
   info "If you have modified the network on the host manualy, those can now be overwritten"
   info "If you do not overwrite this now you need to manually adjust it later"
-info "Do you want to proceed with overwriting the /etc/network/interfaces file? [N/y] "
+  info "Do you want to proceed with that? [N/y] "
   read answer < /dev/tty
 
   if [[ "$answer" =~ "y" ]] || [[ "$answer" =~ "Y" ]]; then
     info "Replacing /etc/network/interfaces"
-    curl -sL "${URL_INTERFACES}" > "${FILE_INTERFACES}";
+    mv -f ${tmp} "${FILE_INTERFACES}"
+    nmrestart='true'
   fi
+fi
+rm -f ${tmp}
 
+if [ "${nmrestart:-false}" = 'true' ]; then
   info "Restarting NetworkManager"
   systemctl restart "${SERVICE_NM}"
+  info "Sleeping for five (5) seconds"
+  sleep 5
+fi
 
 # Parse command line parameters
 while [[ $# -gt 0 ]]; do
@@ -193,7 +209,7 @@ if [ ! -d "$DATA_SHARE" ]; then
 fi
 
 # Read infos from web
-HASSIO_VERSION=$(curl -s $URL_VERSION | jq -e -r '.supervisor')
+HASSIO_VERSION=$(curl -sL $URL_VERSION | jq -e -r '.supervisor')
 
 ##
 # Write configuration