scripts/in_container/run_init_script.sh

#!/usr/bin/env bash
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# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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if [ -z "${FILES_DIR+x}" ]; then
    export FILES_DIR="/files"
fi
if [ -z "${AIRFLOW_BREEZE_CONFIG_DIR+x}" ]; then
    export AIRFLOW_BREEZE_CONFIG_DIR="${FILES_DIR}/airflow-breeze-config"
fi

if [ -z "${INIT_SCRIPT_FILE=}" ]; then
    export INIT_SCRIPT_FILE="init.sh"
fi

if [[ -d "${AIRFLOW_BREEZE_CONFIG_DIR}" && \
    -f "${AIRFLOW_BREEZE_CONFIG_DIR}/${INIT_SCRIPT_FILE}" ]]; then

        pushd "${AIRFLOW_BREEZE_CONFIG_DIR}" >/dev/null 2>&1 || exit 1
        echo
        echo "Sourcing the initialization script from ${INIT_SCRIPT_FILE} in ${AIRFLOW_BREEZE_CONFIG_DIR}"
        echo
         # shellcheck disable=1090
        source "${INIT_SCRIPT_FILE}"
        popd >/dev/null 2>&1 || exit 1
fi

if [[ "${BREEZE_INIT_COMMAND=}" != "" ]]; then
    eval "${BREEZE_INIT_COMMAND}"
fi