remote-encrypt-backup

#!/bin/bash
#
# This script was created to make Duplicity backups.
# Full backups are done once every 3 months.
# Incremental backups are made every other day.

# Check for the number of arguments
if [ $# != 4 ]; then
	echo "Usage: remote-backup <backup-code> <source> <target> <backup-frequency>"
	exit 1
fi

wget -q --tries=10 --timeout=20 --spider http://google.com
if [ $? != 0 ]; then
        echo "Error: Host is not online"
	exit 2
fi

LOG_DIR=/var/log/duplicity

CODE=$1
SOURCE=$2
TARGET=$3
FREQUENCY=$4

# Flags to exclude some dotfiles
if [ $CODE == "dotfiles" ]; then
	FLAGS=" --exclude **$HOME/.cache/** \
		--exclude **$HOME/.gem/** \
		--exclude **$HOME/.local/share/lutris/** \
		--exclude **$HOME/.local/lib/** \
		--exclude **$HOME/.wine/** \
		--exclude **$HOME/.local/share/libvirt/** \
		--exclude **$HOME/.local/share/baloo/** \
		--exclude **$HOME/.local/share/Steam/** \
		--exclude **$HOME/.local/share/vocal/** \
		--exclude **$HOME/.vagrant.d/** \
		--include **$HOME/.** \
		--exclude **\*"
elif [ $CODE == "documents" ]; then
	FLAGS=" --exclude **$HOME/Documents/LEI** \
		--exclude **$HOME/Documents/Jobs**"
else
	unset FLAGS
fi

# Variable to define the xorg session
export DISPLAY=:0

# Setting the passphrase to encrypt the backup files.
# Get the passphrase from kwallet.
export PASSPHRASE=`kwallet-query kdewallet -f Passwords -r $CODE`

# --------- FOR DEBUGGING ------------
# duplicity --dry-run --verbosity 8 --allow-source-mismatch --full-if-older-than $FREQUENCY $FLAGS $SOURCE $TARGET
# Backup files
duplicity --full-if-older-than $FREQUENCY $FLAGS $SOURCE $TARGET >> $LOG_DIR/$CODE.log 2>&1

if [ $? != 0 ]; then
	MESSAGE="Error code: $?. $(date +'%d %b %Y %H:%M')-- Error performing the $CODE backup."
else
	MESSAGE="$(date +'%d %b %Y %H:%M')-- Finished execution of remote $CODE backup."
fi
echo $MESSAGE >> $LOG_DIR/$CODE.log 2>&1

# Delete older backups then 3 months
duplicity remove-older-than 3M \
	--force \
	$TARGET >> $LOG_DIR/$CODE.log 2>&1

# Unsetting the confidential variables so they are gone for sure.
unset PASSPHRASE

exit 0