Dyad/make.project/backup_restore.sh

#!/usr/bin/env bash
set -u

# fix an issue with open files limit on some hosts
ulimit -l unlimited

#ulimit -n 10240 
ulimit -c unlimited

T_SYSROOT=${dir_sysroot}

#!/bin/bash
# move this to the makefile as a dedicated target

APPNAME="Offer Backup"

# ISO 8601 variation
TIMESTAMP="$(date +%Y-%m-%d_%H:%M:%S)"

LOG_DIR="${LOGS_ROOT}/${APPNAME}-${TIMESTAMP}"

# the file to log to
LOGFILE="${APPNAME}.log"

logprint() {
	mkdir -p "${LOG_DIR}"
	echo "[$(date +%Y-%m-%d_%H:%M:%S)] [${APPNAME}] $1" \
	| tee -a "${LOG_DIR}/${LOGFILE}"
}

logprint "Giving the user the option of backing up before proceeding."

assert_zero() {
	if [[ "$1" -eq 0 ]]; then 
		return
	else
		exit $1
	fi
}


is_mounted() {
	findmnt $1 &> /dev/null
	if [ $? != 0 ]; then
		logprint "Not mounted...skipping."
		/usr/bin/false
	else
		logprint "Mounted..."
		/usr/bin/true
	fi
}

function disarm_chroot() {
	logprint "Unmounting CHROOT VFKS mounts"

	logprint "Unmounting ${T_SYSROOT}/dev"
	is_mounted ${T_SYSROOT}/dev && umount -l ${T_SYSROOT}/dev

	logprint "Unmounting ${T_SYSROOT}/dev/pts"
	is_mounted ${T_SYSROOT}/dev/pts && umount -l ${T_SYSROOT}/dev/pts

	logprint "Unmounting ${T_SYSROOT}/proc"
	is_mounted ${T_SYSROOT}/proc && umount -l ${T_SYSROOT}/proc

	# not a symlink on ubuntu
	logprint "Unmounting ${T_SYSROOT}/dev/shm"
	is_mounted ${T_SYSROOT}/dev/shm && umount -l ${T_SYSROOT}/dev/shm

	logprint "Unmounting pyrois inside of chroot"
	is_mounted ${T_SYSROOT}/rex_embedded && umount -l ${T_SYSROOT}/rex_embedded
}

function clear_stage() {
	rm -Rf ${T_SYSROOT}
	assert_zero $?
}

function fail_easy() {
	logprint "$1"
	exit 0
}

function restore() {
	disarm_chroot
	backup_files=($(ls $project_root | grep "backup.tgz"))
	if [[ ${#backup_files[@]} -lt 1 ]]; then
		logprint "No archives present in '$project_root'.  Nothing to restore from. Exiting."
			exit 1
	fi
	
	# Create an array to store the options for the dialog
	options=()
	for file in "${backup_files[@]}"; do
		options+=("$file" "$file" off)
	done

	
	selected=$(dialog --clear --title "Backup Files" \
                --radiolist "Select a backup file:" 20 75 15 \
                "${options[@]}" \
                3>&1 1>&2 2>&3)
	response=$?
	echo "User selected '$selected'"
	[ ! -z $selected ] || fail_easy "User canceled restore."

	dialog --backtitle "Dark Horse Linux: Pyrois" --title "Restore From Backup" --yesno "Selected: '$selected'." 10 60
	response=$?
	
	if [ $response -eq 0 ]; then
		logprint "Entering backup routine.  Clearing stage."
		clear_stage
		sleep 1
		logprint "Restoring backup...This will take a long time..."
		echo
		logprint "Entering ${dir_artifacts}..."
		echo
		pushd ${dir_artifacts}
		assert_zero $?
		tar xpf ${project_root}/$selected
		assert_zero $?
		
		logprint "Backup restored successfully.  Arming chroot."
		pushd ${project_root}
		assert_zero $?
		make arm_chroot
		echo
		logprint "You may now proceed."
		echo
	else
			logprint "User canceled.  Moving on."
			exit 0
	fi
	
	
}


read -r -d '' yn_msg <<-'EOF'
Restore from backup?
EOF

# Use the dialog utility to prompt the user with a yes/no question
dialog --backtitle "Dark Horse Linux: Pyrois" --title "Restore From Backup" --yesno "$yn_msg" 10 60
response=$?

if [ $response -eq 0 ]; then
	logprint "User selected to perform backups."
	restore
else
	logprint "User canceled.  Moving on."
	exit 0
fi