Update host-backup.sh

- code refactoring
- add comments
- loop the main script execution until "No"

misc/host-backup.sh

@@ -15,61 +15,65 @@ function header_info {
                                            /_/
 EOF
 }
-header_info
 
-start() {
+# Function to perform backup
-  BACKUP_PATH=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "\nDefaults to /root/\ne.g. /mnt/backups/" 11 68 --title "Directory to backup to:" 3>&1 1>&2 2>&3)
+function perform_backup {
+  local BACKUP_PATH
+  local DIR
+  local DIR_DASH
+  local BACKUP_FILE
+  local selected_directories=()
 
-  if [ -z "$BACKUP_PATH" ]; then
+  # Get backup path from user
-    BACKUP_PATH="/root/"
+  BACKUP_PATH=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "\nDefaults to /root/\ne.g. /mnt/backups/" 11 68 --title "Directory to backup to:" 3>&1 1>&2 2>&3) || return
-  else
-    BACKUP_PATH="$BACKUP_PATH"
-  fi
 
-  DIR=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "\nDefaults to /etc/\ne.g. /root/, /var/lib/pve-cluster/ etc." 11 68 --title "Directory to work in:" 3>&1 1>&2 2>&3)
+  # Default to /root/ if no input
+  BACKUP_PATH="${BACKUP_PATH:-/root/}"
 
-  if [ -z "$DIR" ]; then
+  # Get directory to work in from user
-    DIR="/etc/"
+  DIR=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "\nDefaults to /etc/\ne.g. /root/, /var/lib/pve-cluster/ etc." 11 68 --title "Directory to work in:" 3>&1 1>&2 2>&3) || return
-  else
+
-    DIR="$DIR"
+  # Default to /etc/ if no input
-  fi
+  DIR="${DIR:-/etc/}"
 
   DIR_DASH=$(echo "$DIR" | tr '/' '-')
   BACKUP_FILE="$(hostname)${DIR_DASH}backup"
-  selected_directories=()
 
+  # Build a list of directories for backup
+  local CTID_MENU=()
   while read -r dir; do
-    DIRNAME=$(basename "$dir")
+    CTID_MENU+=("$(basename "$dir")" "$dir " "OFF")
-    OFFSET=2
+  done < <(ls -d "${DIR}"*)
-    if [[ $((${#DIRNAME} + $OFFSET)) -gt ${MSG_MAX_LENGTH:-} ]]; then
-      MSG_MAX_LENGTH=$((${#DIRNAME} + $OFFSET))
-    fi
-    CTID_MENU+=("$DIRNAME" "$dir " "OFF")
-  done < <(ls -d ${DIR}*)
 
+  # Allow the user to select directories
+  local HOST_BACKUP
   while [ -z "${HOST_BACKUP:+x}" ]; do
     HOST_BACKUP=$(whiptail --backtitle "Proxmox VE Host Backup" --title "Working in the ${DIR} directory " --checklist \
-      "\nSelect what files/directories to backup:\n" \
+      "\nSelect what files/directories to backup:\n" 16 $(((${#DIRNAME} + 2) + 88)) 6 "${CTID_MENU[@]}" 3>&1 1>&2 2>&3) || return
-      16 $(($MSG_MAX_LENGTH + 58)) 6 \
-      "${CTID_MENU[@]}" 3>&1 1>&2 2>&3) || exit
 
     for selected_dir in ${HOST_BACKUP//\"/}; do
-      selected_directories+=("${DIR}${selected_dir}")
+      selected_directories+=("${DIR}$selected_dir")
     done
   done
 
-  selected_directories_string=$(printf "%s " "${selected_directories[@]}")
+  # Perform the backup
   header_info
-  echo -e "This will create a backup in\e[1;33m ${BACKUP_PATH} \e[0mfor these files and directories\e[1;33m ${selected_directories_string% } \e[0m"
+  echo -e "This will create a backup in\e[1;33m $BACKUP_PATH \e[0mfor these files and directories\e[1;33m ${selected_directories[*]} \e[0m"
   read -p "Press ENTER to continue..."
   header_info
   echo "Working..."
-  tar -czf "${BACKUP_PATH}${BACKUP_FILE}-$(date +%Y_%m_%d).tar.gz" --absolute-names ${selected_directories_string% }
+  tar -czf "$BACKUP_PATH$BACKUP_FILE-$(date +%Y_%m_%d).tar.gz" --absolute-names "${selected_directories[@]}"
   header_info
   echo -e "\nFinished"
   echo -e "\e[1;33m \nA backup is rendered ineffective when it remains stored on the host.\n \e[0m"
+  sleep 2
 }
 
+# Main script execution loop
+while true; do
   if (whiptail --backtitle "Proxmox VE Helper Scripts" --title "Proxmox VE Host Backup" --yesno "This will create backups for particular files and directories located within a designated directory. Proceed?" 10 88); then
-  start
+    perform_backup
+  else
+    break
   fi
+done