entrypoint.sh

#!/bin/bash
set -e

if [ -z "$CRON_SCHEDULE" ]; then
    echo "WARNING: $CRON_SCHEDULE not set!"
fi

# Write cron schedule
echo "#!/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

$CRON_SCHEDULE root . /backup/backup.sh >> /backup.log 2>&1
" > /etc/cron.d/postgresql-backup

# Env variables that can be imported from backup script, 
# since cron jobs doesn't get the environment set
echo "#!/bin/bash

export BACKUP_DIR=$BACKUP_DIR
export S3_PATH=$S3_PATH
export DB_NAME=$DB_NAME
export DB_PASS=$DB_PASS
export DB_USER=$DB_USER
export DB_HOST=$DB_HOST
export MAIL_TO=$MAIL_TO
export MAIL_FROM=$MAIL_FROM
export AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID
export AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY
export AWS_DEFAULT_REGION=$AWS_DEFAULT_REGION
export WEBHOOK=$WEBHOOK
export WEBHOOK_METHOD=$WEBHOOK_METHOD
" > /env.sh
chmod +x /env.sh

exec "$@"