B2 backup script

backup.sh

#!/bin/bash

# sleep for a bit to give the computer some time to start up (mainly so the notification shows up)
sleep 5

cd /home/mason/scripts/backup

# set up environment
source ./restic-env.sh
export LOG_FILE="latest_log.txt"
export NOTIF_TITLE="Computer backup"
export X_USERNAME="mason"
export X_USERID="1000"

set -o pipefail
set -e

send_message () {
	sudo -u ${X_USERNAME} DISPLAY=:0 DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/${X_USERID}/bus notify-send -t 5000 "$NOTIF_TITLE" "$1"
	echo "sending message: $1" | tee -a "$LOG_FILE"
}

# how long has it been since we last backed up?
time_now=$(date "+%s")
last_time=$(cat "last_backup_time.txt" || echo "0")
date_diff=$((time_now-last_time))

# 86400 = 24 hours
if [ $date_diff -lt 86400 ]; then
	echo "Recently backed up, not backing up now."
	send_message "Backup not needed"
	exit 0
fi

# empty the logfile
echo "Log started" > "$LOG_FILE"

# log current time
timedatectl | tee -a "$LOG_FILE"

# check if computer is plugged in before backing up
charging_status=$(acpi -a | cut -d " " -f 3)
case $charging_status in
	"on-line")
		echo "Computer is charging, backing up now..." | tee -a "$LOG_FILE"
		;;
	"off-line")
		send_message "Computer is not charging, backup cancelled."
		echo "Computer is not charging, backup cancelled." | tee -a "$LOG_FILE"
		exit 1
		;;
esac

# Be sure to unlock before backing up (I've had stale locks be an issue fairly often, and
# since this is a single computer script I'm not worried about accidental contention)
restic unlock
restic -v backup /home/mason --exclude-file=excludes.txt --compression auto | tee -a "$LOG_FILE"
result=$?

echo "result: $result" | tee -a "$LOG_FILE"

if [[ $result != 0 ]]; then
	message="Backup failed."
else
	message="Backup succeeded."
	# only set the last backup time on a successful backup
	echo "$time_now" > last_backup_time.txt
fi

# remove old snapshots
restic forget --keep-daily 14 --keep-weekly 4 --keep-monthly 6 --keep-yearly 100 --prune

send_message "$message"
echo "$message" | tee -a "$LOG_FILE"

backup_computer.service

[Unit]
Description=Run backup.sh
After=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target

[Service]
ExecStart=/home/mason/scripts/backup/backup.sh
User=root

[Install]
WantedBy=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target

excludes.txt

/home/mason/anaconda3
/home/mason/.conda
/home/mason/.local/share/Steam/steamapps/common
/home/mason/.cache
/home/mason/.cargo
/home/mason/.rustup
/home/mason/.npm
/home/mason/.nuget
/home/mason/.platformio
/home/mason/.thunderbird
/home/mason/.config/google-chrome
/home/mason/.android/avd
/home/mason/.gradle/caches
/home/mason/.local/share/mcpelauncher
/home/mason/.virtualenvs
/home/mason/.vscode/extensions
/home/mason/GrandOrgueCache
/home/mason/.steam/steam/steamapps/common/
/home/mason/.local/share/Trash/

restic-env.sh

export B2_ACCOUNT_ID="ID"
export B2_ACCOUNT_KEY="KEY"
export RESTIC_REPOSITORY="b2:BUCKET"
export RESTIC_PASSWORD_FILE="/home/mason/scripts/backup/restic-password"

restic-password

password here