tuxbot-bot/compose/production/tuxbot/entrypoint

#!/bin/bash

set -o errexit
set -o pipefail
set -o nounset




if [ -z "${POSTGRES_USER}" ]; then
    base_postgres_image_default_user='postgres'
    export POSTGRES_USER="${base_postgres_image_default_user}"
fi
export DATABASE_URL="postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}"

echo "psql at: ${DATABASE_URL}"

postgres_ready() {
python << END
import sys

import asyncpg
import asyncio

async def main():
  try:
    conn = await asyncpg.connect('postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}')
  except Exception:
      sys.exit(-1)
  await conn.close()
  sys.exit(0)

asyncio.get_event_loop().run_until_complete(main())

END
}
until postgres_ready; do
  >&2 echo 'Waiting for PostgreSQL to become available...'
  sleep 1
done
>&2 echo 'PostgreSQL is available'

exec "$@"