#!/bin/bash

make_master_backup() {
    /opt/omnipitr/bin/omnipitr-backup-master -p 54001 -t /home/depesz/omnipitr/tmp/backup-master/ -D /home/depesz/data-master/ -x /home/depesz/omnipitr/backup-archive/ -dl gzip=/home/depesz/omnipitr/backup/ -f "master-__FILETYPE__.tar__CEXT__" -l /home/depesz/omnipitr/log -v

    if [[ ! -e /home/depesz/omnipitr/backup/master-data.tar.gz ]]
    then
        echo "/home/depesz/omnipitr/backup/master-data.tar.gz does not exist?!" >&2
        exit 1
    fi

    if [[ ! -e /home/depesz/omnipitr/backup/master-xlog.tar.gz ]]
    then
        echo "/home/depesz/omnipitr/backup/master-xlog.tar.gz does not exist?!" >&2
        exit 1
    fi

    data_size="$( du -k /home/depesz/omnipitr/backup/master-data.tar.gz | awk '{print $1}')"
    xlog_size="$( du -k /home/depesz/omnipitr/backup/master-xlog.tar.gz | awk '{print $1}')"

    if (( $data_size < 1024 ))
    then
        echo "/home/depesz/omnipitr/backup/master-data.tar.gz exists but looks too small to be sensible!" >&2
        exit 1
    fi
    if (( $xlog_size < 8 ))
    then
        echo "/home/depesz/omnipitr/backup/master-xlog.tar.gz exists but looks too small to be sensible!" >&2
        exit 1
    fi

    # Rotate xlog to make sure there is something in replication archive.
    echo "create table xxx_tmp as select generate_series(1,10) as i;
        checkpoint;
        select pg_switch_xlog();
        drop table xxx_tmp;
        checkpoint;
    " | psql -p 54001 &> /dev/null

}