tracks/script/poll-for-db

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#!/bin/bash
echo "==> Polling DB…"
appdir=$(cd $(dirname "$0")/.. && pwd)
[ -f /etc/app-env ] || exec "$appdir/script/docker-environment" $0 $@
for i in {1..60}; do
nc -z -w5 db 3306 && exit
sleep 1
done
echo "Unable to reach database!"
exit 1