Rewrite update script to fix shellcheck warnings

Signed-off-by: Harsh Shandilya <msfjarvis@gmail.com>

update.sh

@@ -5,29 +5,29 @@ CL_YLW="\033[01;33m"
 
 function reportWarning {
     echo -e ""
-    echo -e ${CL_YLW}"${1}"${CL_RST}
-    if [[ -z ${2} ]]; then
+    echo -e "${CL_YLW}${1}${CL_RST}"
+    if [[ -z "${2}" ]]; then
         echo -e ""
     fi
 }
 
 # Grab all service names
-services=$(ls *.service | cut -d '.' -f 1)
+declare -a services
+while IFS=  read -r -d $'\0'; do
+    services+=("$REPLY")
+done < <(find . -name '*.service' -print0 | sed 's/\.\///g')
 
 # Place the systemd unit files where they belong
 reportWarning "Copying systemd files to /etc/systemd/system"
-sudo cp *.service /etc/systemd/system/
+for service in "${services[@]}"; do cp "${service}" /etc/systemd/system/; done
 
 # Reload systemctl so that it processes our changes
 reportWarning "Reloading systemctl daemon"
-systemctl daemon-reload
-
-# Sleep for 5 seconds to let systemctl get it's shit together
-sleep 5
+sudo systemctl daemon-reload
 
 # Now loop through each service and restart it
-for service in ${services};do
+for service in "${services[@]}"; do
     reportWarning "Restarting ${service}"
-    service ${service} restart
-    [[ -f /etc/systemd/system/${service}.service ]] || systemctl enable ${service}
+    service "${service}" restart
+    [ -f "/etc/systemd/system/${service}.service" ] || systemctl enable "${service}"
 done