Notebook backup script for fedora/rhel using borg

backup.sh

#!/usr/bin/env bash
set -o nounset
set -o errexit
set -o pipefail
if [[ "${TRACE-0}" == "1" ]]; then set -o xtrace; fi

if [[ "${1-}" =~ ^-+h(elp)?$ ]]; then
	cat << USAGE
Usage: ./$(basename "$0")
Backup this pc to a borg repository (https://www.borgbackup.org/). Handles pruning and desktop notifications.
Only starts a backup if there is enough power and the wifi is whitelisted.
USAGE
	exit
fi

REPOSITORY="ssh://...."
VALID_WIFIS="Wifi1 Wifi2"
USERID=1000

LOG="/root/backup.log"
DATE="$(date -I)"

# Output to a logfile
exec > >(tee -a -i "$LOG")
exec 2>&1

# send desktop 
BACKUP_MSG_ID=0
function msg() {
	BACKUP_MSG_ID="$(
		sudo -u "#$USERID" DISPLAY=:0 DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/$USERID/bus" \
			notify-send \
				--app-name=backup \
				--icon=drive-multidisk \
				--print-id \
				--replace-id="$BACKUP_MSG_ID" \
				"Backup $1" "$2 $DATE"
	)"
}

echo "###### Check conditions ######"

[ "$(cat /sys/class/power_supply/AC/online)" -eq "1" ] || ( msg "failed" "no AC" ; exit 5 )
[ "$(cat /sys/class/power_supply/BAT0/capacity)" -gt "50" ] || ( msg "failed" "Bat not full enough" ; exit 6 )

curr_wifi="$(nmcli connection show --active | grep wifi | awk '{print $1}')"
[[ "$VALID_WIFIS" =~ ( |^)$curr_wifi( |$) ]] || ( msg "failed" "Unknown wifi '$curr_wifi'" ; exit 7 )


msg "started ..." ""

# collecting system logs and other debug information
rm -f /root/sos-report/*
sos report --batch -n sendmail --tmp-dir /root/sos-report

echo "###### Backup started: $DATE ######"

#  --dry-run --list \
borg create \
	--remote-path "borg-$(borg --version | cut -c6-8)" \
	--verbose \
	--stats \
	--progress \
	--compression auto,zstd \
	--patterns-from /root/borg-pattern \
	"$REPOSITORY"::"${DATE}"  \
	/home \
	/root \
	/etc \

msg "done" "cleaning up now"

borg prune \
	--remote-path "borg-$(borg --version | cut -c6-8)" \
	--verbose \
	--stats \
	--progress \
	--list \
	--keep-within 2d \
	--keep-daily 10 \
	--keep-weekly 4 \
	--keep-monthly 12 \
	"$REPOSITORY" \


borg compact \
	--remote-path "borg-$(borg --version | cut -c6-8)" \
	--verbose \
	--progress \
	"$REPOSITORY" \

msg "done" "cleaning complete"
echo "###### Backup ended: $DATE ######"