[Unit]
Description=Load/Dump database on start/stop
After=postgresql.service
Requires=postgresql.service

[Service]
Type=oneshot
RemainAfterExit=yes
EnvironmentFile=/etc/environment
ExecStart=/bin/bash -c "if [[ $(ls -t /vol/data/sql/ | head -1) == $DBNAME-updown.sql ]]; then db-load /vol/data/sql/$DBNAME-updown.sql; else echo 'updown.sql is not most recent file in database dir, skipping db-load'; fi"
ExecStop=/bin/bash -c "db-dump /vol/data/sql/$DBNAME-updown.sql"

[Install]
WantedBy=multi-user.target