backup_method.j2

#!/bin/bash

set -e

BORG_PASSPHRASE="{{ passphrase }}"
if ssh-keygen -F "{{ server }}" >/dev/null ; then
    BORG_RSH="ssh -i /root/.ssh/id_{{ app }}_ed25519 -oStrictHostKeyChecking=yes "
else
    BORG_RSH="ssh -i /root/.ssh/id_{{ app }}_ed25519 -oStrictHostKeyChecking=no "
fi
repo=ssh://{{ ssh_user }}@{{ server }}/~/backup   #$4

do_need_mount() {
    true
}

do_backup() {
    
    export BORG_PASSPHRASE
    export BORG_RSH
    work_dir=$1
    name=$2
    repo=$3
    size=$4
    description=$5
    LOGFILE=/var/log/backup_borg.log
    ERRFILE=/var/log/backup_borg.err
    current_date=$(date +"%d_%m_%y_%H:%M")
    pushd $work_dir
    set +e
    if borg init -e repokey $repo >> $LOGFILE 2>> $ERRFILE; then
	    #human_size=`echo $size | awk '{ suffix=" KMGT"; for(i=1; $1>1024 && i < length(suffix); i++) $1/=1024; print int($1) substr(suffix, i, 1), $3; }'`
	    # Speed in Kbps
	    #speed=1000
	    #evaluated_time=$(($size / ($speed * 1000 / 8) / 3600))
	    echo "Hello,

Your first backup on $repo is starting.

This is an automated message from your beloved YunoHost server." | /usr/bin/mail.mailutils -a "Content-Type: text/plain; charset=UTF-8" -s "[YNH] First backup is starting" "root"
    fi
    set -e

    borg create $repo::${name}_${current_date} ./ >> $LOGFILE 2>> $ERRFILE
    popd

    borg prune $repo -P ${name} --keep-hourly 2 --keep-daily=7 --keep-weekly=8 --keep-monthly=12 >> $LOGFILE 2>> $ERRFILE
}

do_mount() {
    export BORG_PASSPHRASE
    export BORG_RSH
    work_dir=$1
    name=$2
    repo=$3
    size=$4
    description=$5
    LOGFILE=/var/log/backup_borg.log
    ERRFILE=/var/log/backup_borg.err
    borg mount $repo::$name $work_dir >> $LOGFILE 2>> $ERRFILE
}

work_dir=$2
name=$3

size=$5
description=$6

case "$1" in
  need_mount)
    do_need_mount $work_dir $name $repo $size $description
    ;;
  backup)
    do_backup $work_dir $name $repo $size $description
    ;;
  mount)
    do_mount
    ;;
  *)
    echo "hook called with unknown argument \`$1'" >&2
    exit 1
    ;;
esac

exit 0