#!/bin/sh

umask 077

if [ `whoami` != postgres ]; then
    echo "ERR: Script needs to be run as postgres user" 1>&2
    exit 1
fi

DESTDIR="<%= @datadir %>"
MAXAGE="<%= @maxage %>"

DATE=`date "+%Y-%m-%d"`

if [ ! -d ${DESTDIR} ]; then
    echo "ERR: PostgreSQL backup directory [${DESTDIR}] does not exist" 1>&2
    exit 1
fi

cd ${DESTDIR} && {
    find . -xdev -mindepth 2 -maxdepth 2 -type f -mtime +7 -execdir rm -f -- {} \;
    find . -xdev -depth -mindepth 1 -maxdepth 1 -type d -empty -execdir rmdir -- {} \;
}

DESTDIR=${DESTDIR}/${DATE}
mkdir -p ${DESTDIR}

for db in `psql -l -t | sed -n 's/^ \([^ ]\+\) .*/\1/p'`; do
    case ${db} in
        template*)
            continue
            ;;
    esac
    pg_dump ${db} | gzip > ${DESTDIR}/${db}.${DATE}.gz 
done