0k-charms/odoo-tecnativa/resources/opt/odoo/common/entrypoint.d/20-postgres-wait

#!/bin/bash
if [ "$WAIT_DB" != true ]; then
    log INFO Not waiting for a postgres server
    exit 0
fi

log INFO Waiting until postgres is listening at $PGHOST...
while true; do
    if [ -n "$PGDATABASE" ]; then
        echo "SELECT 1;" | psql "$PGDATABASE"
    else
        # Assumes that your access level to postgres includes the
        # right to list databases
        psql -l
    fi > /dev/null 2>&1 && break
    sleep 1
done