wand/wait-for-postgres.sh

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#!/bin/sh
# wait-for-postgres.sh
set -e
host="$1"
shift
cmd="$@"
until PGUSER=$POSTGRES_USER PGPASSWORD=$POSTGRES_PASSWORD psql -h "$host" -c '\q'; do
>&2 echo "Postgres is unavailable - sleeping"
sleep 1
done
>&2 echo "Postgres is up - executing command"
exec $cmd