#!/usr/bin/env bash

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# 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
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
set -euo pipefail

AIRFLOW_SOURCES="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
export AIRFLOW_SOURCES
readonly AIRFLOW_SOURCES

# Bash arrays need to be defined outside of functions unfortunately :(
# Because on Mac OS Bash 3.4 defining arrays inside functions does not work
# Array with extra options for Docker compose
declare -a EXTRA_DC_OPTIONS
export EXTRA_DC_OPTIONS

# Array with selected integrations
declare -a INTEGRATIONS
export INTEGRATIONS

# This is where remaining args are passed
declare -a REMAINING_ARGS
export REMAINING_ARGS

# This is where static check options are defined
declare -a EXTRA_STATIC_CHECK_OPTIONS
export EXTRA_STATIC_CHECK_OPTIONS

#######################################################################################################
# Sets up all the default variables for Breeze. They are needed by all other functions
# All those variables are exported. They are not set to read-only because those
# defaults can be modified later on when command line arguments are parsed
# and variables stored in .build directory (stored in the previous run) are read
#
# Used globals:
#    FORCE_SCREEN_WIDTH
#
# Modified globals (constants or candidates for constants after we override them via appropriate flags):
#
#    BREEZE
#    SUPPRESS_CHEATSHEET_FILE
#    SUPPRESS_ASCIIART_FILE
#    MAX_SCREEN_WIDTH
#    SCREEN_WIDTH
#    MOUNT_LOCAL_SOURCES
#    MOUNT_FILES
#    FORCE_PULL_IMAGES
#    ENABLE_KIND_CLUSTER
#    FORWARD_CREDENTIALS
#    DB_RESET
#    START_AIRFLOW
#    INSTALL_AIRFLOW_VERSION
#    INSTALL_AIRFLOW_REFERENCE
#    FORCE_BUILD_IMAGES
#    PRODUCTION_IMAGE
#    PYTHON_MAJOR_MINOR_VERSION
#
# Global variables:
#
#    command_to_run
#    second_command_to_run
#    docker_compose_command
#
# Also it sets the variables and globals set by common initialization functions from
# scripts/ci/libraries/_initialization.sh and breeze-complete script (which sets-up auto-complete).
#
#######################################################################################################
function breeze::setup_default_breeze_constants() {
    # Indicates that we are inside Breeze environment
    export BREEZE=true
    readonly BREEZE

    # If those files are present, the ASCII-art/cheat-sheet are suppressed
    SUPPRESS_CHEATSHEET_FILE="${AIRFLOW_SOURCES}/.build/.suppress_cheatsheet"
    readonly SUPPRESS_CHEATSHEET_FILE

    SUPPRESS_ASCIIART_FILE="${AIRFLOW_SOURCES}/.build/.suppress_asciiart"
    readonly SUPPRESS_ASCIIART_FILE

    # Maximum screen indented_screen_width to print the lines spanning the whole terminal indented_screen_width
    export MAX_SCREEN_WIDTH=100
    readonly MAX_SCREEN_WIDTH

    # By default we mount local Airflow sources
    export MOUNT_LOCAL_SOURCES="true"

    # By default we mount files folder
    export MOUNT_FILES="true"

    # By default we only pull images if we do not have them locally.
    # This can be overridden by '--force-pull-images' flag
    export FORCE_PULL_IMAGES="false"

    # Do not enable Kind Kubernetes cluster by default
    export ENABLE_KIND_CLUSTER="false"

    # Forward common host credentials to docker (gcloud, aws etc.).
    export FORWARD_CREDENTIALS="false"

    # If set to true, the database will be reset at entry. Works for Postgres and MySQL
    export DB_RESET="false"

    # If set to true, the database will be initialized, a user created and webserver and scheduler started
    export START_AIRFLOW="false"

    # If it set is set to specified version, then the source version of Airflow
    # is removed and the specified version of Airflow is installed from PyPi
    export INSTALL_AIRFLOW_VERSION=""

    # If it is set to specified reference (tag/branch), then the source version
    # of Airflow is removed and the specified version of Airflow is installed from GitHub
    export INSTALL_AIRFLOW_REFERENCE=""

    # Determines whether to force build without checking if it is needed
    # Can be overridden by '--force-build-images' flag.
    export FORCE_BUILD_IMAGES="false"

    # load all the common functions here - those are the functions that are shared between Breeze
    # and CI scripts. The CI scripts do not use Breeze as driving script - they read all configuration
    # from the environment variables. That's why we keep all the common initialization in those libs
    # shellcheck source=scripts/ci/libraries/_all_libs.sh
    . "${AIRFLOW_SOURCES}/scripts/ci/libraries/_all_libs.sh"

    # When we generate documentation for README files, we want to force the indented_screen_width of terminal so that
    # No matter who is running the documentation generation gets the same output
    if [[ ${FORCE_SCREEN_WIDTH:="false"} != "true" ]]; then
        # Sets indented_screen_width of the screen from terminal
        SCREEN_WIDTH="$(tput cols)"
        if [[ -z ${SCREEN_WIDTH=} ]]; then
            SCREEN_WIDTH=${MAX_SCREEN_WIDTH}
        fi
        if ((SCREEN_WIDTH > MAX_SCREEN_WIDTH)); then
            SCREEN_WIDTH=${MAX_SCREEN_WIDTH}
        fi
    else
        SCREEN_WIDTH=${MAX_SCREEN_WIDTH}
    fi

    export SCREEN_WIDTH
    readonly SCREEN_WIDTH

    # Update short and long options in the breeze-complete script
    # This way autocomplete will work automatically with all options available
    # shellcheck source=breeze-complete
    . "${AIRFLOW_SOURCES}/breeze-complete"

    # Default command to run - entering breeze environment
    command_to_run="enter_breeze"

    # In some cases we also want to run two commands in a row (for example when we restart the environment)
    second_command_to_run=""

    # Determines if help should be run (set to true by --help flag)
    run_help="false"

    # Holds docker compose command if the `docker-compose` command is used.
    docker_compose_command=""
}

#######################################################################################################
#
# Initializes development-friendly virtualenv if you are already in such env. It installs all the necessary
# packages from PyPI and it case of problems it provides useful hints on what prerequisites should be
# installed. It also removes and resets the existing AIRFLOW_HOME installation to make sure that you
# have it synchronized with the version of airflow installed. It resets the airflow's sqlite database to
# a clean state. You can use this function if your virtualenv is broken, to clean it up
#
# Used globals:
#    PYTHON_MAJOR_MINOR_VERSION
#    AIRFLOW_HOME_DIR
#    AIRFLOW_SOURCES
#    DEFAULT_CONSTRAINTS_BRANCH
#    OSTYPE
#
#######################################################################################################
function breeze::initialize_virtualenv() {
    # Check if we are inside virtualenv
    set +e
    echo -e "import sys\nif not hasattr(sys,'base_prefix'):\n  sys.exit(1)" |
        python"${PYTHON_MAJOR_MINOR_VERSION}"
    local res=$?
    set -e
    if [[ ${res} != "0" ]]; then
        echo >&2
        echo >&2 "ERROR:  Initializing local virtualenv only works when you have virtualenv activated"
        echo >&2
        echo >&2 "Please enter your local virtualenv before (for example using 'pyenv activate' or 'workon') "
        echo >&2
        exit 1
    else
        echo
        echo "Initializing the virtualenv: $(command -v python)!"
        echo
        echo "This will wipe out ${AIRFLOW_HOME_DIR} and reset all the databases!"
        echo
        "${AIRFLOW_SOURCES}/confirm" "Proceeding with the initialization"
        echo
        pushd "${AIRFLOW_SOURCES}"
        set +e
        # We need to export this one to speed up Cassandra driver installation in virtualenv
        CASS_DRIVER_NO_CYTHON="1" pip install -e ".[devel]" \
            --constraint "https://raw.githubusercontent.com/apache/airflow/${DEFAULT_CONSTRAINTS_BRANCH}/constraints-${PYTHON_MAJOR_MINOR_VERSION}.txt"
        res=$?
        set -e
        popd
        if [[ ${res} != "0" ]]; then
            echo "#######################################################################"
            echo "  You had some troubles installing the venv !!!!!"
            echo "  Try running the command below and rerun virtualenv installation"
            echo
            if [[ ${OSTYPE} == "darwin"* ]]; then
                echo "  brew install sqlite mysql postgresql openssl"
            else
                echo "  sudo apt install build-essentials python3.6-dev python3.7-dev python3.8-dev python-dev openssl \\"
                echo "              sqlite sqlite-dev default-libmysqlclient-dev libmysqld-dev postgresql"
            fi
            echo
            echo "#######################################################################"
            exit ${res}
        fi
        echo
        echo "Wiping and recreating ${AIRFLOW_HOME_DIR}"
        echo
        rm -rvf "${AIRFLOW_HOME_DIR}"
        mkdir -p "${AIRFLOW_HOME_DIR}"
        echo
        echo "Resetting AIRFLOW sqlite database"
        echo
        AIRFLOW__CORE__LOAD_EXAMPLES="False" \
            AIRFLOW__CORE__UNIT_TEST_MODE="False" \
            AIRFLOW__CORE__SQL_ALCHEMY_POOL_ENABLED="False" \
            AIRFLOW__CORE__DAGS_FOLDER="${AIRFLOW_SOURCES}/empty" \
            AIRFLOW__CORE__PLUGINS_FOLDER="${AIRFLOW_SOURCES}/empty" \
            airflow db reset -y
        echo
        echo "Resetting AIRFLOW sqlite unit test database"
        echo
        AIRFLOW__CORE__LOAD_EXAMPLES="False" \
            AIRFLOW__CORE__UNIT_TEST_MODE="True" \
            AIRFLOW__CORE__SQL_ALCHEMY_POOL_ENABLED="False" \
            AIRFLOW__CORE__DAGS_FOLDER="${AIRFLOW_SOURCES}/empty" \
            AIRFLOW__CORE__PLUGINS_FOLDER="${AIRFLOW_SOURCES}/empty" \
            airflow db reset -y
        echo
        echo "Initialization of virtualenv was successful! Go ahead and develop Airflow!"
        echo
        exit 0
    fi
}

#######################################################################################################
#
# Sets up autocomplete for Breeze for both - bash and zsh
#
# Used globals:
#
#    AIRFLOW_SOURCES
#    HOME
#    OSTYPE
#
#######################################################################################################
function breeze::setup_autocomplete() {
    echo "Installing bash/zsh completion for local user"
    echo
    "${AIRFLOW_SOURCES}/confirm" "This will create ~/.bash_completion.d/ directory and modify ~/.*rc files"
    echo
    echo
    mkdir -pv ~/.bash_completion.d
    ln -sf "${AIRFLOW_SOURCES}/breeze-complete" "${HOME}/.bash_completion.d/"
    echo
    echo "Breeze Bash completion is now linked to: ${AIRFLOW_SOURCES}/breeze-complete"
    echo
    local breeze_comment="Added by Airflow Breeze autocomplete setup"
    if ! grep "${breeze_comment}" "${HOME}/.bashrc" >/dev/null 2>&1; then
        touch ~/.bashrc
        # shellcheck disable=SC2129
        echo "# START: ${breeze_comment}" >>~/.bashrc
        cat <<"EOF" >>~/.bashrc
for bcfile in ~/.bash_completion.d/* ; do
    . ${bcfile}
done
EOF
        echo "# END: ${breeze_comment}" >>~/.bashrc
        echo
        echo "The ${HOME}/.bashrc has been modified"
        echo
    else
        echo
        echo "The ${HOME}/.bashrc was already modified before. Not changing it."
        echo
    fi
    if ! grep "${breeze_comment}" "${HOME}/.zshrc" >/dev/null 2>&1; then
        # shellcheck disable=SC2129
        echo "# START: ${breeze_comment}" >>~/.zshrc
        cat <<"EOF" >>~/.zshrc
autoload compinit && compinit
autoload bashcompinit && bashcompinit
source ~/.bash_completion.d/breeze-complete
EOF
        echo "# END: ${breeze_comment}" >>~/.zshrc
        echo
        echo "The ${HOME}/.zshrc has been modified"
        echo
    else
        echo
        echo "The ${HOME}/.zshrc was already modified before. Not changing it."
        echo
    fi
    if [[ "${OSTYPE}" == "darwin"* ]]; then
        #  For MacOS we have to handle the special case where terminal app DOES NOT run .bashrc by default
        #  But re-runs .bash_profile :(
        #  See https://scriptingosx.com/2017/04/about-bash_profile-and-bashrc-on-macos/
        if ! grep "${breeze_comment}" "${HOME}/.bash_profile"; then
            # shellcheck disable=SC2129
            echo "# START: ${breeze_comment}" >>~/.bash_profile
            cat <<"EOF" >>~/.bash_profile
if [ -r ~/.bashrc ]; then
    source ~/.bashrc
fi
EOF
            echo "# END: ${breeze_comment}" >>~/.bash_profile
            echo
            echo "The ${HOME}/.bash_profile has been modified"
            echo
        else
            echo
            echo "The ${HOME}/.bash_profile was already modified before. Not changing it."
            echo
        fi
    fi
    echo
    echo
    echo "Breeze completion is installed to ~/.bash_completion.d/breeze-complete"
    echo
    echo "Please exit and re-enter your shell or run:"
    echo
    echo "    source ~/.bash_completion.d/breeze-complete"
    echo
    exit 0
}

#######################################################################################################
#
# Prints information about the current configuration of Breeze - if you enter breeze interactively
# and you did not suppress cheatsheet or asciiart, it also prints those. It also prints values
# of constants set by breeze::read_saved_environment_variables() function and other initialization functions.
#
# Used globals:
#
#    BACKEND
#    POSTGRES_VERSION
#    MYSQL_VERSION
#    SUPPRESS_CHEATSHEET_FILE
#    SUPPRESS_ASCIIART_FILE
#    PRODUCTION_IMAGE
#    BRANCH_NAME
#    AIRFLOW_CI_IMAGE
#    AIRFLOW_PROD_IMAGE
#    AIRFLOW_VERSION
#    DOCKERHUB_USER
#    DOCKERHUB_REPO
#    INSTALL_AIRFLOW_VERSION
#    INSTALL_AIRFLOW_REFERENCE
#
# Outputs:
#    Prints the information about the build to stdout.
#
#######################################################################################################
function breeze::print_badge() {
    local backend_version=""
    if [[ ${BACKEND} == "postgres" ]]; then
        backend_version="${POSTGRES_VERSION}"
    elif [[ ${BACKEND} == "mysql" ]]; then
        backend_version="${MYSQL_VERSION}"
    fi
    if [[ ! -f "${SUPPRESS_ASCIIART_FILE}" && ${command_to_run} == "enter_breeze" ]]; then
        cat <<EOF


                                  @&&&&&&@
                                 @&&&&&&&&&&&@
                                &&&&&&&&&&&&&&&&
                                        &&&&&&&&&&
                                            &&&&&&&
                                             &&&&&&&
                           @@@@@@@@@@@@@@@@   &&&&&&
                          @&&&&&&&&&&&&&&&&&&&&&&&&&&
                         &&&&&&&&&&&&&&&&&&&&&&&&&&&&
                                         &&&&&&&&&&&&
                                             &&&&&&&&&
                                           &&&&&&&&&&&&
                                      @@&&&&&&&&&&&&&&&@
                   @&&&&&&&&&&&&&&&&&&&&&&&&&&&&  &&&&&&
                  &&&&&&&&&&&&&&&&&&&&&&&&&&&&    &&&&&&
                 &&&&&&&&&&&&&&&&&&&&&&&&         &&&&&&
                                                 &&&&&&
                                               &&&&&&&
                                            @&&&&&&&&
            @&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
           &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
          &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&


     @&&&@       &&  @&&&&&&&&&&&   &&&&&&&&&&&&  &&            &&&&&&&&&&  &&&     &&&     &&&
    &&& &&&      &&  @&&       &&&  &&            &&          &&&       &&&@ &&&   &&&&&   &&&
   &&&   &&&     &&  @&&&&&&&&&&&&  &&&&&&&&&&&   &&          &&         &&&  &&& &&& &&@ &&&
  &&&&&&&&&&&    &&  @&&&&&&&&&     &&            &&          &&@        &&&   &&@&&   &&@&&
 &&&       &&&   &&  @&&     &&&@   &&            &&&&&&&&&&&  &&&&&&&&&&&&     &&&&   &&&&

&&&&&&&&&&&&   &&&&&&&&&&&&   &&&&&&&&&&&@  &&&&&&&&&&&&   &&&&&&&&&&&   &&&&&&&&&&&
&&&       &&&  &&        &&&  &&            &&&                  &&&&    &&
&&&&&&&&&&&&@  &&&&&&&&&&&&   &&&&&&&&&&&   &&&&&&&&&&&       &&&&       &&&&&&&&&&
&&&        &&  &&   &&&&      &&            &&&             &&&&         &&
&&&&&&&&&&&&&  &&     &&&&@   &&&&&&&&&&&@  &&&&&&&&&&&&  @&&&&&&&&&&&   &&&&&&&&&&&

EOF
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            cat <<EOF

                               Use production image.

                               Branch name:            ${BRANCH_NAME}
                               Docker image:           ${AIRFLOW_PROD_IMAGE}
                               Airflow source version: $(build_images::get_airflow_version_from_production_image)
EOF
        else
            cat <<EOF

                               Use CI image.

                               Branch name:            ${BRANCH_NAME}
                               Docker image:           ${AIRFLOW_CI_IMAGE}
                               Airflow source version: ${AIRFLOW_VERSION}
EOF
        fi
        cat <<EOF
                               Python version:         ${PYTHON_MAJOR_MINOR_VERSION}
                               DockerHub user:         ${DOCKERHUB_USER}
                               DockerHub repo:         ${DOCKERHUB_REPO}
                               Backend:                ${BACKEND} ${backend_version}
EOF
        if [[ -n ${INSTALL_AIRFLOW_VERSION=} || -n ${INSTALL_AIRFLOW_REFERENCE=} ]]; then
            cat <<EOF

                               Airflow installed: ${INSTALL_AIRFLOW_VERSION=}${INSTALL_AIRFLOW_REFERENCE=}

EOF
        fi
    else
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            cat <<EOF

   Production image.

   Branch name:             ${BRANCH_NAME}
   Docker image:            ${AIRFLOW_PROD_IMAGE}
EOF
        else
            cat <<EOF

   CI image.

   Branch name:             ${BRANCH_NAME}
   Docker image:            ${AIRFLOW_CI_IMAGE}
EOF
        fi
        cat <<EOF

   Airflow source version:  ${AIRFLOW_VERSION}
   Python version:          ${PYTHON_MAJOR_MINOR_VERSION}
   DockerHub user:          ${DOCKERHUB_USER}
   DockerHub repo:          ${DOCKERHUB_REPO}
   Backend:                 ${BACKEND} ${backend_version}
EOF
        if [[ -n ${INSTALL_AIRFLOW_VERSION=} || -n ${INSTALL_AIRFLOW_REFERENCE=} ]]; then
            cat <<EOF

   Airflow installed from: ${INSTALL_AIRFLOW_VERSION}${INSTALL_AIRFLOW_REFERENCE}

EOF
        fi
    fi
}

#######################################################################################################
#
# Prepares command file that can be used to easily run the docker commands outside of Breeze.
#
# The command file generated in cache ./build directory is a standalone script that contains
# All the environment variables and docker-compose configuration to run the command.
# This is because depending on configuration of Breeze we might have different compose files
# used and different env variables set.
#
# Those are a convenience scripts that you might use to debug command execution although
# In most cases they are used internally by Breeze.
#
# Used Globals:
#   BRANCH_NAME
#   PYTHON_MAJOR_MINOR_VERSION
#   DOCKERHUB_USER
#   DOCKERHUB_REPO
#   HOST_AIRFLOW_SOURCES
#   BACKEND
#   AIRFLOW_VERSION
#   INSTALL_AIRFLOW_VERSION
#   WEBSERVER_HOST_PORT
#   POSTGRES_HOST_PORT
#   POSTGRES_VERSION
#   MYSQL_HOST_PORT
#   MYSQL_VERSION
#   AIRFLOW_SOURCES
#   AIRFLOW_CI_IMAGE
#   AIRFLOW_PROD_IMAGE
#   AIRFLOW_PROD_IMAGE_KUBERNETES
#   AIRFLOW_PROD_BASE_TAG
#   SQLITE_URL
#
# Arguments:
#
#   file to prepare
#   command to run
#   compose_file to use
#   airflow_image to use
#
# Outputs:
#   Creates the convenience command file that can be run to use the docker command.
#
#######################################################################################################
function breeze::prepare_command_file() {
    local file="${1}"
    local command="${2}"
    local compose_file="${3}"
    local airflow_image="${4}"
    cat <<EOF >"${file}"
#!/usr/bin/env bash
if [[ \${VERBOSE} == "true" ]]; then
  echo
  echo "Executing script:"
  echo
  echo "${file} \${@}"
  echo
  set -x
fi
cd "\$( dirname "\${BASH_SOURCE[0]}" )" || exit
export DOCKERHUB_USER=${DOCKERHUB_USER}
export DOCKERHUB_REPO=${DOCKERHUB_REPO}
export HOST_USER_ID=${HOST_USER_ID}
export HOST_GROUP_ID=${HOST_GROUP_ID}
export HOST_AIRFLOW_SOURCES="${AIRFLOW_SOURCES}"
export COMPOSE_FILE="${compose_file}"
export PYTHON_MAJOR_MINOR_VERSION="${PYTHON_MAJOR_MINOR_VERSION}"
export BACKEND="${BACKEND}"
export AIRFLOW_VERSION="${AIRFLOW_VERSION}"
export INSTALL_AIRFLOW_VERSION="${INSTALL_AIRFLOW_VERSION}"
export WEBSERVER_HOST_PORT="${WEBSERVER_HOST_PORT}"
export POSTGRES_HOST_PORT="${POSTGRES_HOST_PORT}"
export POSTGRES_VERSION="${POSTGRES_VERSION}"
export MYSQL_HOST_PORT="${MYSQL_HOST_PORT}"
export MYSQL_VERSION="${MYSQL_VERSION}"
export AIRFLOW_SOURCES="${AIRFLOW_SOURCES}"
export AIRFLOW_CI_IMAGE="${AIRFLOW_CI_IMAGE}"
export AIRFLOW_PROD_IMAGE="${AIRFLOW_PROD_IMAGE}"
export AIRFLOW_PROD_IMAGE_KUBERNETES="${AIRFLOW_PROD_IMAGE_KUBERNETES}"
export AIRFLOW_PROD_BASE_TAG="${AIRFLOW_PROD_BASE_TAG}"
export AIRFLOW_IMAGE="${airflow_image}"
export SQLITE_URL="${SQLITE_URL}"
docker-compose --log-level INFO ${command}
EOF
    chmod u+x "${file}"
}

#######################################################################################################
#
# Prepare all command files that we are using. Depending on the command to execute we use two
# convenience scripts:
#
#    dc_ci - to run docker compose command for CI image
#    dc_prod - to run docker compose command for PROD image
#
# Global constants set:
#
#     PYTHON_BASE_IMAGE_VERSION
#     PYTHON_BASE_IMAGE
#     AIRFLOW_CI_IMAGE
#     AIRFLOW_PROD_BASE_TAG
#     AIRFLOW_PROD_IMAGE
#     AIRFLOW_PROD_IMAGE_KUBERNETES
#     BUILT_CI_IMAGE_FLAG_FILE
#
#######################################################################################################
function breeze::prepare_command_files() {
    local main_ci_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/base.yml
    local main_prod_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/base.yml
    local backend_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/backend-${BACKEND}.yml
    local local_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/local.yml
    local files_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/files.yml
    local local_prod_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/local-prod.yml
    local remove_sources_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/remove-sources.yml
    local forward_credentials_docker_compose_file=${SCRIPTS_CI_DIR}/docker-compose/forward-credentials.yml

    local compose_ci_file=${main_ci_docker_compose_file}:${backend_docker_compose_file}
    local compose_prod_file=${main_prod_docker_compose_file}:${backend_docker_compose_file}

    if [[ "${MOUNT_LOCAL_SOURCES}" != "false" ]]; then
        compose_ci_file=${compose_ci_file}:${local_docker_compose_file}
        compose_prod_file=${compose_prod_file}:${local_prod_docker_compose_file}
    fi

    if [[ "${MOUNT_FILES}" != "false" ]]; then
        compose_ci_file=${compose_ci_file}:${files_docker_compose_file}
        compose_prod_file=${compose_prod_file}:${files_docker_compose_file}
    fi

    if [[ ${FORWARD_CREDENTIALS} == "true" ]]; then
        compose_ci_file=${compose_ci_file}:${forward_credentials_docker_compose_file}
        compose_prod_file=${compose_prod_file}:${forward_credentials_docker_compose_file}
    fi

    if [[ -n ${INSTALL_AIRFLOW_VERSION=} ]]; then
        compose_ci_file=${compose_ci_file}:${remove_sources_docker_compose_file}
    fi

    set +u
    local unique_integrations
    # shellcheck disable=SC2207
    unique_integrations=($(echo "${INTEGRATIONS[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))

    local integration
    for integration in "${unique_integrations[@]}"; do
        compose_ci_file=${compose_ci_file}:${SCRIPTS_CI_DIR}/docker-compose/integration-${integration}.yml
    done
    set -u

    export DOCKER_COMPOSE_RUN_SCRIPT_FOR_CI="dc_ci"
    readonly DOCKER_COMPOSE_RUN_SCRIPT_FOR_CI

    export DOCKER_COMPOSE_RUN_SCRIPT_FOR_PROD="dc_prod"
    readonly DOCKER_COMPOSE_RUN_SCRIPT_FOR_PROD

    # Prepare script for "run docker compose CI command"
    breeze::prepare_command_file "${BUILD_CACHE_DIR}/${DOCKER_COMPOSE_RUN_SCRIPT_FOR_CI}" \
        "\"\${@}\"" "${compose_ci_file}" "${AIRFLOW_CI_IMAGE}"

    # Prepare script for "run docker compose PROD command"
    breeze::prepare_command_file "${BUILD_CACHE_DIR}/${DOCKER_COMPOSE_RUN_SCRIPT_FOR_PROD}" \
        "\"\${@}\"" "${compose_prod_file}" "${AIRFLOW_PROD_IMAGE}"
}

#######################################################################################################
#
# Prints detailed help for all commands and flags. Used to generate documentation added to BREEZE.rst
# automatically.
#
# Used global variables:
#    _breeze_all_commands
#
# Outputs:
#   Prints detailed help for all commands to stdout.
#
#######################################################################################################
function breeze::do_help_all() {
    echo
    breeze::print_line
    breeze::usage
    breeze::print_line
    echo
    echo
    echo "Detailed usage"
    echo
    breeze::print_line
    echo
    local subcommand
    # shellcheck disable=SC2154
    for subcommand in ${_breeze_all_commands}; do
        breeze::detailed_usage "${subcommand}"
        breeze::print_line
        echo
    done
    echo
    breeze::flags
}

#######################################################################################################
#
# Parses all arguments that can be passed to Breeze command - that includes command to run and flags.
#
# Used global variables:
#   _breeze_getopt_short_options
#   _breeze_getopt_long_options
#   _breeze_allowed_integrations
#
# Updated global constants:
#      By the end of this function, all the constants from `initialization::make_constants_read_only`
#      function are set and they are set as read-only.
#
#######################################################################################################
function breeze::parse_arguments() {
    set -u
    local params
    if ! params=$(getopt \
        -o "${_breeze_getopt_short_options:=}" \
        -l "${_breeze_getopt_long_options:=}" \
        --name "$CMDNAME" -- "$@"); then
        breeze::flags
        exit 1
    fi

    eval set -- "${params}"
    unset params

    # Parse Flags.
    # Please update short and long options in the breeze-complete script
    # This way autocomplete will work out-of-the-box
    while true; do
        case "${1}" in
        -h | --help)
            run_help="true"
            shift
            ;;
        -p | --python)
            export PYTHON_MAJOR_MINOR_VERSION="${2}"
            echo "Python version: ${PYTHON_MAJOR_MINOR_VERSION}"
            echo
            shift 2
            ;;
        -b | --backend)
            export BACKEND="${2}"
            echo "Backend: ${BACKEND}"
            echo
            shift 2
            ;;
        -i | --integration)
            local INTEGRATION=${2}
            parameters::check_and_save_allowed_param "INTEGRATION" "integration" "--integration"
            echo "Integration: ${INTEGRATION}"
            if [[ ${INTEGRATION} == "all" ]]; then
                # shellcheck disable=SC2154
                for INTEGRATION in ${_breeze_allowed_integrations}; do
                    if [[ ${INTEGRATION} != "all" ]]; then
                        echo "${INTEGRATION}"
                        INTEGRATIONS+=("${INTEGRATION}")
                    fi
                done
            else
                INTEGRATIONS+=("${INTEGRATION}")
            fi
            echo
            shift 2
            ;;
        -K | --kubernetes-mode)
            export KUBERNETES_MODE="${2}"
            echo "Kubernetes mode: ${KUBERNETES_MODE}"
            echo
            shift 2
            ;;
        -V | --kubernetes-version)
            export KUBERNETES_VERSION="${2}"
            echo "Kubernetes version: ${KUBERNETES_VERSION}"
            echo
            shift 2
            ;;
        --kind-version)
            export KIND_VERSION="${2}"
            echo "Kind version: ${KIND_VERSION}"
            echo
            shift 2
            ;;
        --helm-version)
            export HELM_VERSION="${2}"
            echo "Helm version: ${HELM_VERSION}"
            echo
            shift 2
            ;;
        --postgres-version)
            export POSTGRES_VERSION="${2}"
            echo "Postgres version: ${POSTGRES_VERSION}"
            echo
            shift 2
            ;;
        --mysql-version)
            export MYSQL_VERSION="${2}"
            echo "MySQL version: ${MYSQL_VERSION}"
            echo
            shift 2
            ;;
        -l | --skip-mounting-local-sources)
            MOUNT_LOCAL_SOURCES="false"
            echo "Mount local sources: ${MOUNT_LOCAL_SOURCES}"
            echo
            shift
            ;;
        -a | --install-airflow-version)
            INSTALL_AIRFLOW_VERSION="${2}"
            # Reference is mutually exclusive with version
            INSTALL_AIRFLOW_REFERENCE=""
            echo "Installs version of Airflow: ${INSTALL_AIRFLOW_VERSION}"
            echo
            shift 2
            ;;
        -t | --install-airflow-reference)
            INSTALL_AIRFLOW_REFERENCE="${2}"
            # Reference is mutually exclusive with version
            INSTALL_AIRFLOW_VERSION=""
            echo "Installs Airflow from reference: ${INSTALL_AIRFLOW_REFERENCE}"
            echo
            shift 2
            ;;
        -d | --db-reset)
            echo "Resetting the DB!"
            echo
            export DB_RESET="true"
            shift
            ;;
        -v | --verbose)
            export VERBOSE="true"
            echo "Verbose output"
            echo
            shift
            ;;
        -y | --assume-yes)
            export FORCE_ANSWER_TO_QUESTIONS="yes"
            echo "Assuming 'yes' answer to all questions."
            echo
            shift
            ;;
        -n | --assume-no)
            export FORCE_ANSWER_TO_QUESTIONS="no"
            echo "Assuming 'no' answer to all questions."
            echo
            shift
            ;;
        -q | --assume-quit)
            export FORCE_ANSWER_TO_QUESTIONS="quit"
            echo "Assuming 'quit' answer to all questions."
            echo
            shift
            ;;
        -F | --force-build-images)
            echo "Force build images"
            echo
            export FORCE_BUILD_IMAGES="true"
            # if you want to force  build an image - assume you want to build it :)
            export FORCE_ANSWER_TO_QUESTIONS="yes"
            shift
            ;;
        -C | --force-clean-images)
            echo "Clean build of images without cache"
            echo
            export DOCKER_CACHE="no-cache"
            # if not set here, docker cached is determined later, depending on type of image to be build
            readonly DOCKER_CACHE
            export FORCE_BUILD_IMAGES="true"
            shift
            ;;
        -r | --skip-rebuild-check)
            echo "Skips checking image for rebuilds"
            echo
            export CHECK_IMAGE_FOR_REBUILD="false"
            export SKIP_BUILDING_PROD_IMAGE="true"
            shift
            ;;
        -L | --build-cache-local)
            echo "Use local cache to build images"
            echo
            export DOCKER_CACHE="local"
            # if not set here, docker cached is determined later, depending on type of image to be build
            readonly DOCKER_CACHE
            shift
            ;;
        -U | --build-cache-pulled)
            echo "Use pulled cache to build images"
            echo
            export DOCKER_CACHE="pulled"
            # if not set here, docker cached is determined later, depending on type of image to be build
            readonly DOCKER_CACHE
            shift
            ;;
        -X | --build-cache-disabled)
            echo "Use disabled cache to build images"
            echo
            export DOCKER_CACHE="disabled"
            readonly DOCKER_CACHE
            # if not set here, docker cached is determined later, depending on type of image to be build
            shift
            ;;
        -P | --force-pull-images)
            echo "Force pulling images before build. Uses pulled images as cache."
            echo
            export FORCE_PULL_IMAGES="true"
            export FORCE_BUILD_IMAGES="true"
            # if you want to force  build an image - assume you want to build it :)
            export FORCE_ANSWER_TO_QUESTIONS="yes"
            shift
            ;;
        -I | --production-image)
            export PRODUCTION_IMAGE="true"
            export SQLITE_URL=
            echo
            echo "*************** PRODUCTION IMAGE *************************"
            echo
            shift
            ;;
        -E | --extras)
            export AIRFLOW_EXTRAS="${2}"
            echo "Extras : ${AIRFLOW_EXTRAS}"
            shift 2
            ;;
        --additional-extras)
            export ADDITIONAL_AIRFLOW_EXTRAS="${2}"
            echo "Additional extras : ${ADDITIONAL_AIRFLOW_EXTRAS}"
            shift 2
            ;;
        --additional-python-deps)
            export ADDITIONAL_PYTHON_DEPS="${2}"
            echo "Additional python dependencies: ${ADDITIONAL_PYTHON_DEPS}"
            shift 2
            ;;
        --additional-dev-deps)
            export ADDITIONAL_DEV_DEPS="${2}"
            echo "Additional apt dev dependencies: ${ADDITIONAL_DEV_DEPS}"
            shift 2
            ;;
        --additional-runtime-deps)
            export ADDITIONAL_RUNTIME_DEPS="${2}"
            echo "Additional apt runtime dependencies: ${ADDITIONAL_RUNTIME_DEPS}"
            shift 2
            ;;
        -D | --dockerhub-user)
            export DOCKERHUB_USER="${2}"
            echo "Dockerhub user ${DOCKERHUB_USER}"
            echo
            shift 2
            ;;
        -R | --dockerhub-repo)
            export DOCKERHUB_REPO="${2}"
            echo "Dockerhub repo ${DOCKERHUB_REPO}"
            echo
            shift 2
            ;;
        -f | --forward-credentials)
            echo "Forwarding credentials. Be careful as your credentials ar available in the container!"
            echo
            export FORWARD_CREDENTIALS="true"
            shift
            ;;
        -c | --github-registry)
            echo
            echo "Use github registry"
            echo
            export USE_GITHUB_REGISTRY="true"
            shift
            ;;
        -g | --github-repository)
            echo
            echo "GitHub repository: ${2}"
            echo
            echo "Using github registry."
            echo
            export GITHUB_REPOSITORY="${2}"
            export USE_GITHUB_REGISTRY="true"
            shift 2
            ;;
        -s | --github-image-id)
            echo
            echo "GitHub image id: ${2}"
            echo
            echo "Force pulling the image, using github registry and skip mounting local sources."
            echo "This is in order to get the exact same version as used in CI environment for SHA/RUN_ID!."
            echo
            export FORCE_PULL_IMAGES="true"
            export USE_GITHUB_REGISTRY="true"
            export GITHUB_REGISTRY_PULL_IMAGE_TAG="${2}"
            export GITHUB_REGISTRY_PUSH_IMAGE_TAG="${2}"
            export CHECK_IMAGE_FOR_REBUILD="false"
            export SKIP_BUILDING_PROD_IMAGE="true"
            export MOUNT_LOCAL_SOURCES="false"
            export SKIP_CHECK_REMOTE_IMAGE="true"
            shift 2
            ;;
        --start-airflow)
            echo "Starting Airflow"
            echo
            export START_AIRFLOW="true"
            shift
            ;;
        --init-script)
            export INIT_SCRIPT_FILE="${2}"
            echo "The initialization file is in ${INIT_SCRIPT_FILE}"
            echo
            shift 2
            ;;
        -S | --version-suffix-for-pypi)
            if [[ -n ${VERSION_SUFFIX_FOR_SVN=} ]]; then
                echo
                echo "You can only set one version suffix - either for PyPI or for SVN"
                echo
                exit 1
            fi
            export VERSION_SUFFIX_FOR_PYPI="${2}"
            echo "Version suffix for PyPI ${VERSION_SUFFIX_FOR_PYPI}"
            echo
            shift 2
            ;;
        -N | --version-suffix-for-svn)
            if [[ -n ${VERSION_SUFFIX_FOR_PYPI=} ]]; then
                echo
                echo "You can only set one version suffix - either for PyPI or for SVN"
                echo
                exit 1
            fi
            export VERSION_SUFFIX_FOR_SVN="${2}"
            echo "Version suffix for SVN ${VERSION_SUFFIX_FOR_SVN}"
            echo
            shift 2
            ;;
        --)
            shift
            break
            ;;
        *)
            breeze::flags
            echo >&2
            echo >&2 "ERROR: Unknown flag ${1}"
            echo >&2
            exit 1
            ;;
        esac
    done
    local last_subcommand=""
    # Parse commands
    if [[ "$#" -ne 0 ]]; then
        case "${1}" in
        shell)
            last_subcommand="${1}"
            shift
            ;;
        exec)
            last_subcommand="${1}"
            command_to_run="run_exec"
            shift
            ;;
        build-docs)
            last_subcommand="${1}"
            command_to_run="build_docs"
            shift
            ;;
        build-image)
            last_subcommand="${1}"
            command_to_run="build_image"
            # if you want to build an image - assume you want to build it :)
            export FORCE_ANSWER_TO_QUESTIONS="yes"
            # and assume you want to build it no matter if it is needed
            export FORCE_BUILD_IMAGES="true"
            echo "Build image"
            echo
            shift
            ;;
        cleanup-image)
            last_subcommand="${1}"
            echo "Cleanup the image"
            echo
            command_to_run="cleanup_image"
            shift
            ;;
        docker-compose)
            last_subcommand="${1}"
            if [[ $# -lt 2 ]]; then
                echo "You should specify docker compose command to run"
                shift
                run_help="true"
            else
                docker_compose_command="${2}"
                shift 2
            fi
            command_to_run="run_docker_compose"
            ;;
        generate-constraints)
            last_subcommand="${1}"
            command_to_run="perform_generate_constraints"
            export FORCE_ANSWER_TO_QUESTIONS="yes"
            export FORCE_BUILD_IMAGES="true"
            export UPGRADE_TO_LATEST_CONSTRAINTS="true"
            shift
            ;;
        prepare-backport-packages)
            last_subcommand="${1}"
            command_to_run="perform_prepare_backport_packages"
            shift
            ;;
        prepare-backport-readme)
            last_subcommand="${1}"
            command_to_run="perform_prepare_backport_readme"
            shift
            ;;
        push-image)
            last_subcommand="${1}"
            command_to_run="perform_push_image"
            export SKIP_CHECK_REMOTE_IMAGE="true"
            shift
            ;;
        initialize-local-virtualenv)
            last_subcommand="${1}"
            echo "Initializing local virtualenv"
            echo
            command_to_run="perform_initialize_local_virtualenv"
            shift
            ;;
        kind-cluster)
            last_subcommand="${1}"
            # Switch to production image for all kind operations
            export PRODUCTION_IMAGE="true"
            command_to_run="manage_kind_cluster"
            export KIND_CLUSTER_OPERATION="${2:-}"
            if [[ -n ${KIND_CLUSTER_OPERATION=} ]]; then
                shift 2
            else
                shift
            fi
            ;;
        setup-autocomplete)
            last_subcommand="${1}"
            echo "Setting up autocomplete"
            echo
            command_to_run="perform_setup_autocomplete"
            shift
            ;;
        static-check)
            last_subcommand="${1}"
            command_to_run="perform_static_checks"
            if [[ "$#" -lt 2 ]]; then
                if [[ ${run_help} != "true" ]]; then
                    echo "You should specify static check that you would like to run or 'all' to run all checks."
                    echo
                    echo "One of :"
                    echo
                    echo "${_breeze_allowed_static_checks:=}"
                    echo
                    echo "For example:"
                    echo
                    echo "${CMDNAME} static-check mypy"
                    echo
                    exit 1
                else
                    shift
                fi
            else
                export PYTHON_MAJOR_MINOR_VERSION=${DEFAULT_PYTHON_MAJOR_MINOR_VERSION}
                static_check="${2:-}"
                EXTRA_STATIC_CHECK_OPTIONS+=("--show-diff-on-failure")
                shift 2
            fi
            ;;
        stop)
            last_subcommand="${1}"
            command_to_run="run_docker_compose"
            docker_compose_command="down"
            EXTRA_DC_OPTIONS+=("--remove-orphans")
            shift
            ;;
        restart)
            last_subcommand="${1}"
            command_to_run="run_docker_compose"
            docker_compose_command="down"
            EXTRA_DC_OPTIONS+=("--remove-orphans")
            second_command_to_run="enter_breeze"
            echo "Restarts the environment. Includes emptying the databases."
            shift
            ;;
        tests)
            last_subcommand="${1}"
            if [[ $# -lt 2 ]]; then
                run_help="true"
            else
                shift
            fi
            command_to_run="run_tests"
            ;;
        toggle-suppress-cheatsheet)
            last_subcommand="${1}"
            if [[ -f "${SUPPRESS_CHEATSHEET_FILE}" ]]; then
                rm -f "${SUPPRESS_CHEATSHEET_FILE}"
            else
                touch "${SUPPRESS_CHEATSHEET_FILE}"
            fi
            echo "Toggle suppress cheatsheet"
            echo
            shift
            command_to_run="toggle_suppress_cheatsheet"
            ;;
        toggle-suppress-asciiart)
            last_subcommand="${1}"
            if [[ -f "${SUPPRESS_ASCIIART_FILE}" ]]; then
                rm -f "${SUPPRESS_ASCIIART_FILE}"
            else
                touch "${SUPPRESS_ASCIIART_FILE}"
            fi
            echo "Toggle suppress asciiart"
            echo
            shift
            command_to_run="toggle_suppress_asciiart"
            ;;
        flags)
            breeze::flags
            exit 0
            ;;
        help)
            breeze::usage
            exit 0
            ;;
        help-all)
            breeze::do_help_all
            exit 0
            ;;
        *)
            breeze::usage
            echo >&2
            echo >&2 "ERROR: Unknown command ${1}"
            echo >&2
            exit 1
            ;;
        esac
    else
        :
        # By default, start interactive terminal
    fi

    if [[ ${run_help} == "true" ]]; then
        if [[ ${last_subcommand} == "" ]]; then
            breeze::usage
            breeze::flag_footer
        else
            breeze::detailed_usage "${last_subcommand}"
        fi
        exit 0
    fi

    # EXTRA_DC_OPTIONS is only used by Breeze. It's value is set here as well.
    readonly EXTRA_DC_OPTIONS

    # Also Remaining args are set here and set as read-only - no more changes to it.
    REMAINING_ARGS+=("$@")
    export REMAINING_ARGS
    readonly REMAINING_ARGS
}

#######################################################################################################
#
# Prepares nicely formatted versions of list of allowed and default values defined in Breeze.
# It is used in help command to print the lists in a readable format and fold the lists
# so that they fit the screen indented_screen_width.
#
# Used global variables:
#    _breeze_allowed_*
#
# Updated global constants:
#       FORMATTED_* constant variables that can be used in Breeze Help output
#
#######################################################################################################
function breeze::prepare_formatted_versions() {
    local indent=15
    local list_prefix
    list_prefix=$(printf "%-${indent}s" " ")
    local indented_screen_width=$((SCREEN_WIDTH - indent))

    FORMATTED_PYTHON_MAJOR_MINOR_VERSIONS=$(echo "${_breeze_allowed_python_major_minor_versions=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_PYTHON_MAJOR_MINOR_VERSIONS

    FORMATTED_BACKENDS=$(echo "${_breeze_allowed_backends=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_BACKENDS

    FORMATTED_STATIC_CHECKS=$(echo "${_breeze_allowed_static_checks=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_STATIC_CHECKS

    FORMATTED_INTEGRATIONS=$(echo "${_breeze_allowed_integrations=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_INTEGRATIONS

    FORMATTED_KUBERNETES_MODES=$(echo "${_breeze_allowed_kubernetes_modes=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_KUBERNETES_MODES

    FORMATTED_KUBERNETES_VERSIONS=$(echo "${_breeze_allowed_kubernetes_versions=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_KUBERNETES_VERSIONS

    FORMATTED_KIND_VERSIONS=$(echo "${_breeze_allowed_kind_versions=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_KIND_VERSIONS

    FORMATTED_HELM_VERSIONS=$(echo "${_breeze_allowed_helm_versions=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_HELM_VERSIONS

    FORMATTED_KIND_OPERATIONS=$(echo "${_breeze_allowed_kind_operations=""}" | tr '\n' ' ' |
        fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_KIND_OPERATIONS

    FORMATTED_INSTALL_AIRFLOW_VERSIONS=$(echo "${_breeze_allowed_install_airflow_versions=""}" |
        tr '\n' ' ' | fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_INSTALL_AIRFLOW_VERSIONS

    FORMATTED_POSTGRES_VERSIONS=$(echo "${_breeze_allowed_postgres_versions=""}" |
        tr '\n' ' ' | fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_POSTGRES_VERSIONS

    FORMATTED_MYSQL_VERSIONS=$(echo "${_breeze_allowed_mysql_versions=""}" |
        tr '\n' ' ' | fold -w "${indented_screen_width}" -s | sed "s/^/${list_prefix}/")
    readonly FORMATTED_MYSQL_VERSIONS

    FORMATTED_DEFAULT_CI_EXTRAS=$(echo "${DEFAULT_CI_EXTRAS=}" |
        tr ',' ' ' | fold -w "${indented_screen_width}" -s | sed "s/ /,/g; s/^/${list_prefix}/")
    readonly FORMATTED_DEFAULT_CI_EXTRAS

    FORMATTED_DEFAULT_PROD_EXTRAS=$(echo "${DEFAULT_PROD_EXTRAS=}" |
        tr ',' ' ' | fold -w "${indented_screen_width}" -s | sed "s/ /,/g; s/^/${list_prefix}/")
    readonly FORMATTED_DEFAULT_PROD_EXTRAS
}

#######################################################################################################
#
# Prepares usage information for all the commands in Breeze.
# Those usage commands are stored in appropriate environment variables.
#
# Created constants:
#    USAGE_*
#    DETAILED_USAGE_*
#
#######################################################################################################

# shellcheck disable=SC2034,SC2090,SC2089,SC2155

function breeze::prepare_usage() {
    # Note that MacOS uses Bash 3.* and we cannot use associative arrays
    export USAGE_SHELL="[Default] Enters interactive shell in the container"
    readonly USAGE_SHELL
    export USAGE_EXEC="Execs into running breeze container in new terminal"
    readonly USAGE_EXEC
    export USAGE_BUILD_DOCS="Builds documentation in the container"
    readonly USAGE_BUILD_DOCS
    export USAGE_BUILD_IMAGE="Builds CI or Production docker image"
    readonly USAGE_BUILD_DOCS
    export USAGE_CLEANUP_IMAGE="Cleans up the container image created"
    readonly USAGE_BUILD_DOCS
    export USAGE_DOCKER_COMPOSE="Executes specified docker-compose command"
    readonly USAGE_DOCKER_COMPOSE
    export USAGE_FLAGS="Shows all breeze's flags"
    readonly USAGE_FLAGS
    export USAGE_GENERATE_CONSTRAINTS="Generates pinned constraint files"
    readonly USAGE_GENERATE_CONSTRAINTS
    export USAGE_INITIALIZE_LOCAL_VIRTUALENV="Initializes local virtualenv"
    readonly USAGE_INITIALIZE_LOCAL_VIRTUALENV
    export USAGE_PREPARE_BACKPORT_README="Prepares backport packages readme files"
    readonly USAGE_PREPARE_BACKPORT_README
    export USAGE_PREPARE_BACKPORT_PACKAGES="Prepares backport packages"
    readonly USAGE_PREPARE_BACKPORT_PACKAGES
    export USAGE_PUSH_IMAGE="Pushes images to registry"
    readonly USAGE_PUSH_IMAGE
    export USAGE_KIND_CLUSTER="Manages KinD cluster on the host"
    readonly USAGE_KIND_CLUSTER
    export USAGE_SETUP_AUTOCOMPLETE="Sets up autocomplete for breeze"
    readonly USAGE_SETUP_AUTOCOMPLETE
    export USAGE_STOP="Stops the docker-compose environment"
    readonly USAGE_STOP
    export USAGE_RESTART="Stops the docker-compose environment including DB cleanup"
    readonly USAGE_RESTART
    export USAGE_STATIC_CHECK="Performs selected static check for changed files"
    readonly USAGE_STATIC_CHECK
    export USAGE_TOGGLE_SUPPRESS_CHEATSHEET="Toggles on/off cheatsheet"
    readonly USAGE_TOGGLE_SUPPRESS_CHEATSHEET
    export USAGE_TOGGLE_SUPPRESS_ASCIIART="Toggles on/off asciiart"
    readonly USAGE_TOGGLE_SUPPRESS_ASCIIART
    export USAGE_TESTS="Runs selected tests in the container"
    readonly USAGE_TESTS
    export USAGE_HELP="Shows this help message"
    readonly USAGE_HELP
    export USAGE_HELP_ALL="Shows detailed help for all commands and flags"
    readonly USAGE_HELP_ALL

    export DETAILED_USAGE_SHELL="
${CMDNAME} shell [FLAGS] [-- <EXTRA_ARGS>]

      This is default subcommand if no subcommand is used.

      Enters interactive shell where you can run all tests, start Airflow webserver, scheduler,
      workers, interact with the database, run DAGs etc. It is the default command if no command
      is selected. The shell is executed in the container and in case integrations are chosen,
      the integrations will be started as separated docker containers - under the docker-compose
      supervision. Local sources are by default mounted to within the container so you can edit
      them locally and run tests immediately in the container. Several folders ('files', 'dist')
      are also mounted so that you can exchange files between the host and container.

      The 'files/airflow-breeze-config/variables.env' file can contain additional variables
      and setup. This file is automatically sourced when you enter the container. Database
      and webserver ports are forwarded to appropriate database/webserver so that you can
      connect to it from your host environment.

      You can also pass <EXTRA_ARGS> after -- they will be passed as bash parameters, this is
      especially useful to pass bash options, for example -c to execute command:

      '${CMDNAME} shell -- -c \"ls -la\"'
      '${CMDNAME} -- -c \"ls -la\"'

      For DockerHub pull --dockerhub-user and --dockerhub-repo flags can be used to specify
      the repository to pull from. For GitHub repository, the --github-repository
      flag can be used for the same purpose. You can also use
      --github-image-id <COMMIT_SHA>|<RUN_ID> in case you want to pull the image
      with specific COMMIT_SHA tag or RUN_ID.

      '${CMDNAME} shell \\
            --github-image-id 9a621eaa394c0a0a336f8e1b31b35eff4e4ee86e' - pull/use image with SHA
      '${CMDNAME} \\
            --github-image-id 9a621eaa394c0a0a336f8e1b31b35eff4e4ee86e' - pull/use image with SHA
      '${CMDNAME} shell \\
            --github-image-id 209845560' - pull/use image with RUN_ID
      '${CMDNAME} \\
            --github-image-id 209845560' - pull/use image with RUN_ID

Flags:
$(breeze::flag_footer)
"
    readonly DETAILED_USAGE_SHELL
    export DETAILED_USAGE_EXEC="
${CMDNAME} exec [-- <EXTRA_ARGS>]

      Execs into interactive shell to an already running container. The container mus be started
      already by breeze shell command. If you are not familiar with tmux, this is the best
      way to run multiple processes in the same container at the same time for example scheduler,
      webserver, workers, database console and interactive terminal.
"
    export DETAILED_USAGE_BUILD_DOCS="
${CMDNAME} build-docs [-- <EXTRA_ARGS>]

      Builds Airflow documentation. The documentation is build inside docker container - to
      maintain the same build environment for everyone. Appropriate sources are mapped from
      the host to the container so that latest sources are used. The folders where documentation
      is generated ('docs/_build') are also mounted to the container - this way results of
      the documentation build is available in the host.

      The possible extra args are: --docs-only, --spellcheck-only, --help
"
    readonly DETAILED_USAGE_BUILD_DOCS
    export DETAILED_USAGE_BUILD_IMAGE="
${CMDNAME} build-image [FLAGS]

      Builds docker image (CI or production) without entering the container. You can pass
      additional options to this command, such as '--force-build-image',
      '--force-pull-image', '--python', '--build-cache-local' or '-build-cache-pulled'
      in order to modify build behaviour.

      You can also pass '--production-image' flag to build production image rather than CI image.

      For DockerHub pull --dockerhub-user and --dockerhub-repo flags can be used to specify
      the repository to pull from. For GitHub repository, the --github-repository
      flag can be used for the same purpose. You can also use
      --github-image-id <COMMIT_SHA>|<RUN_ID> in case you want to pull the image with
      specific COMMIT_SHA tag or RUN_ID.

Flags:
$(breeze::flag_airflow_variants)
$(breeze::flag_choose_different_airflow_version)
$(breeze::flag_production_image)
$(breeze::flag_build_docker_images)
$(breeze::flag_pull_push_docker_images)
$(breeze::flag_verbosity)
"
    readonly DETAILED_USAGE_BUILD_IMAGE
    export DETAILED_USAGE_CLEANUP_IMAGE="
${CMDNAME} cleanup-image [FLAGS]

      Removes the breeze-related images created in your local docker image cache. This will
      not reclaim space in docker cache. You need to 'docker system prune' (optionally
      with --all) to reclaim that space.

Flags:
$(breeze::flag_airflow_variants)
$(breeze::flag_production_image)
$(breeze::flag_verbosity)
"
    readonly DETAILED_USAGE_CLEANUP_IMAGE
    export DETAILED_USAGE_DOCKER_COMPOSE="
${CMDNAME} docker-compose [FLAGS] COMMAND [-- <EXTRA_ARGS>]

      Run docker-compose command instead of entering the environment. Use 'help' as command
      to see available commands. The <EXTRA_ARGS> passed after -- are treated
      as additional options passed to docker-compose. For example

      '${CMDNAME} docker-compose pull -- --ignore-pull-failures'

Flags:
$(breeze::flag_airflow_variants)
$(breeze::flag_backend_variants)
$(breeze::flag_verbosity)
"
    readonly DETAILED_USAGE_DOCKER_COMPOSE
    export DETAILED_USAGE_FLAGS="
      Explains in detail all the flags that can be used with breeze.
"
    readonly DETAILED_USAGE_FLAGS
    export DETAILED_USAGE_PREPARE_BACKPORT_README="
${CMDNAME} prepare-backport-packages [FLAGS] [YYYY.MM.DD] [PACKAGE_ID ...]

      Prepares README.md files for backport packages. You can provide (after --) optional version
      in the form of YYYY.MM.DD, optionally followed by the list of packages to generate readme for.
      If the first parameter is not formatted as a date, then today is regenerated.
      If no packages are specified, readme for all packages are generated.
      If no date is specified, current date + 3 days is used (allowing for PMC votes to pass).

      Examples:

      '${CMDNAME} prepare-backport-readme' or
      '${CMDNAME} prepare-backport-readme 2020.05.10' or
      '${CMDNAME} prepare-backport-readme 2020.05.10 https google amazon'

      General form:

      '${CMDNAME} prepare-backport-readme YYYY.MM.DD <PACKAGE_ID> ...'

      * YYYY.MM.DD - is the CALVER version of the package to prepare. Note that this date
        cannot be earlier than the already released version (the script will fail if it
        will be). It can be set in the future anticipating the future release date.

      * <PACKAGE_ID> is usually directory in the airflow/providers folder (for example
        'google' but in several cases, it might be one level deeper separated with
        '.' for example 'apache.hive'

Flags:
$(breeze::flag_verbosity)
"
    readonly DETAILED_USAGE_PREPARE_BACKPORT_README
    export DETAILED_USAGE_GENERATE_CONSTRAINTS="
${CMDNAME} generate-constraints [FLAGS]

      Generates pinned constraint files from setup.py. Those files are generated in files folder
      - separate files for different python version. Those constraint files when pushed to orphan
      constraint-master and constraint-1-10 branches are used to generate repeatable
      CI builds as well as run repeatable production image builds. You can use those constraints
      to predictably install released Airflow versions. This is mainly used to test the constraint
      generation - constraints are pushed to the orphan branches by a successful scheduled
      CRON job in CI automatically.

Flags:
$(breeze::flag_airflow_variants)
$(breeze::flag_verbosity)
"
    readonly DETAILED_USAGE_GENERATE_CONSTRAINTS
    export DETAILED_USAGE_INITIALIZE_LOCAL_VIRTUALENV="
${CMDNAME} initialize-local-virtualenv [FLAGS]

      Initializes locally created virtualenv installing all dependencies of Airflow
      taking into account the constraints for the version specified.
      This local virtualenv can be used to aid auto-completion and IDE support as
      well as run unit tests directly from the IDE. You need to have virtualenv
      activated before running this command.

Flags:
$(breeze::flag_airflow_variants)
"
    readonly DETAILED_USAGE_INITIALIZE_LOCAL_VIRTUALENV
    export DETAILED_USAGE_PREPARE_BACKPORT_PACKAGES="
${CMDNAME} prepare-backport-packages [FLAGS] [PACKAGE_ID ...]

      Prepares backport packages. You can provide (after --) optional list of packages to prepare.
      If no packages are specified, readme for all packages are generated. You can specify optional
      --version-suffix-for-svn flag to generate rc candidate packages to upload to SVN or
      --version-suffix-for-pypi flag to generate rc candidates for PyPI packages.

      Examples:

      '${CMDNAME} prepare-backport-packages' or
      '${CMDNAME} prepare-backport-packages google' or
      '${CMDNAME} prepare-backport-packages --version-suffix-for-svn rc1 http google amazon' or
      '${CMDNAME} prepare-backport-packages --version-suffix-for-pypi rc1 http google amazon'

      General form:

      '${CMDNAME} prepare-backport-packages \\
            [--version-suffix-for-svn|--version-suffix-for-pypi] <PACKAGE_ID> ...'

      * <PACKAGE_ID> is usually directory in the airflow/providers folder (for example
        'google'), but in several cases, it might be one level deeper separated with '.'
        for example 'apache.hive'

Flags:
$(breeze::flag_version_suffix)
$(breeze::flag_verbosity)
"
    readonly DETAILED_USAGE_PREPARE_BACKPORT_PACKAGES
    export DETAILED_USAGE_PUSH_IMAGE="
${CMDNAME} push_image [FLAGS]

      Pushes images to docker registry. You can push the images to DockerHub registry (default)
      or to the GitHub registry (if --github-registry flag is used).

      For DockerHub pushes --dockerhub-user and --dockerhub-repo flags can be used to specify
      the repository to push to. For GitHub repository, the --github-repository
      flag can be used for the same purpose. You can also add
      --github-image-id <COMMIT_SHA>|<RUN_ID> in case you want to push image with specific
      SHA tag or run id. In case you specify --github-repository or --github-image-id, you
      do not need to specify --github-registry flag.

      You can also add --production-image flag to switch to production image (default is CI one)

      Examples:

      '${CMDNAME} push-image' or
      '${CMDNAME} push-image --dockerhub-user user' to push to your private registry or
      '${CMDNAME} push-image --production-image' - to push production image or
      '${CMDNAME} push-image --github-registry' - to push to GitHub image registry or
      '${CMDNAME} push-image \\
            --github-repository user/airflow' - to push to your user's fork
      '${CMDNAME} push-image \\
            --github-image-id 9a621eaa394c0a0a336f8e1b31b35eff4e4ee86e' - to push with COMMIT_SHA
      '${CMDNAME} push-image \\
            --github-image-id 209845560' - to push with RUN_ID

Flags:
$(breeze::flag_pull_push_docker_images)
$(breeze::flag_verbosity)
"
    readonly DETAILED_USAGE_PUSH_IMAGE
    export DETAILED_USAGE_KIND_CLUSTER="
${CMDNAME} kind-cluster [FLAGS] OPERATION

      Manages host-side Kind Kubernetes cluster that is used to run Kubernetes integration tests.
      It allows to start/stop/restart/status the Kind Kubernetes cluster and deploy Airflow to it.
      This enables you to run tests inside the breeze environment with latest airflow images.
      Note that in case of deploying airflow, the first step is to rebuild the image and loading it
      to the cluster so you can also pass appropriate build image flags that will influence
      rebuilding the production image. Operation is one of:

${FORMATTED_KIND_OPERATIONS}

Flags:
$(breeze::flag_airflow_variants)
$(breeze::flag_build_docker_images)
"
    readonly DETAILED_USAGE_KIND_CLUSTER
    export DETAILED_USAGE_SETUP_AUTOCOMPLETE="
${CMDNAME} setup-autocomplete

      Sets up autocomplete for breeze commands. Once you do it you need to re-enter the bash
      shell and when typing breeze command <TAB> will provide autocomplete for
      parameters and values.
"
    readonly DETAILED_USAGE_SETUP_AUTOCOMPLETE
    export DETAILED_USAGE_STOP="
${CMDNAME} stop

      Brings down running docker compose environment. When you start the environment, the docker
      containers will continue running so that startup time is shorter. But they take quite a lot of
      memory and CPU. This command stops all running containers from the environment.
"
    readonly DETAILED_USAGE_STOP
    export DETAILED_USAGE_RESTART="
${CMDNAME} restart [FLAGS]

      Restarts running docker compose environment. When you restart the environment, the docker
      containers will be restarted. That includes cleaning up the databases. This is
      especially useful if you switch between different versions of Airflow.

Flags:
$(breeze::flag_footer)
"
    readonly DETAILED_USAGE_RESTART
    export DETAILED_USAGE_STATIC_CHECK="
${CMDNAME} static-check [FLAGS] static_check [-- <EXTRA_ARGS>]

      Run selected static checks for currently changed files. You should specify static check that
      you would like to run or 'all' to run all checks. One of:

${FORMATTED_STATIC_CHECKS}

      You can pass extra arguments including options to to the pre-commit framework as
      <EXTRA_ARGS> passed after --. For example:

      '${CMDNAME} static-check mypy' or
      '${CMDNAME} static-check mypy -- --files tests/core.py'
      '${CMDNAME} static-check mypy -- --all-files'

      You can see all the options by adding --help EXTRA_ARG:

      '${CMDNAME} static-check mypy -- --help'
"
    readonly DETAILED_USAGE_STATIC_CHECK
    export DETAILED_USAGE_TESTS="
${CMDNAME} tests [FLAGS] [TEST_TARGET ..] [-- <EXTRA_ARGS>]

      Run the specified unit test target. There might be multiple
      targets specified separated with comas. The <EXTRA_ARGS> passed after -- are treated
      as additional options passed to pytest. You can pass 'tests' as target to
      run all tests. For example:

      '${CMDNAME} tests tests/test_core.py -- --logging-level=DEBUG'
      '${CMDNAME} tests tests

Flags:
$(breeze::flag_footer)
"
    readonly DETAILED_USAGE_TESTS
    export DETAILED_USAGE_TOGGLE_SUPPRESS_CHEATSHEET="
${CMDNAME} toggle-suppress-cheatsheet

      Toggles on/off cheatsheet displayed before starting bash shell.
"
    readonly DETAILED_USAGE_TOGGLE_SUPPRESS_CHEATSHEET
    export DETAILED_USAGE_TOGGLE_SUPPRESS_ASCIIART="
${CMDNAME} toggle-suppress-asciiart

      Toggles on/off asciiart displayed before starting bash shell.
"
    readonly DETAILED_USAGE_TOGGLE_SUPPRESS_ASCIIART
    export DETAILED_USAGE_HELP="
${CMDNAME} help

      Shows general help message for all commands.
"
    readonly DETAILED_USAGE_HELP
    export DETAILED_USAGE_HELP_ALL="
${CMDNAME} help-all

      Shows detailed help for all commands and flags.
"
    readonly DETAILED_USAGE_HELP_ALL
}

# shellcheck enable=all

#######################################################################################################
#
# Gets environment variable value converting the lowercase name of command into variable name
# Arguments:
#     prefix for the variable to add
#     name of the variable
# Outputs:
#     Writes the capitalized name of the variable to stdout
#######################################################################################################
function breeze::get_variable_from_lowercase_name() {
    local prefix="${1}"
    local name="${2}"
    local suffix
    suffix="$(echo "${name}" | tr "[:lower:]-" "[:upper:]_")"
    local variable_name="${prefix}_${suffix}"
    echo "${!variable_name}"
}

#######################################################################################################
#
# Gets usage information from lowercase command
# Arguments:
#     lowercase command name
# Outputs:
#    usage information for the command.
#######################################################################################################
function breeze::get_usage() {
    breeze::get_variable_from_lowercase_name "USAGE" "${1}"
}

#######################################################################################################
#
# Gets detailed usage information from lowercase command
# Arguments:
#     lowercase command name
# Outputs:
#    Detailed usage information for the command.
#######################################################################################################
function breeze::get_detailed_usage() {
    breeze::get_variable_from_lowercase_name "DETAILED_USAGE" "${1}"
}

#######################################################################################################
#
# Prints general usage information for all commands.
#
# Globals used:
#    CMDNAME
#    _breeze_commands
#    _breeze_extra_arg_commands
#    _breeze_help_commands
#
# Outputs:
#    General usage information for all commands.
#######################################################################################################
function breeze::usage() {
    echo "

usage: ${CMDNAME} [FLAGS] [COMMAND] -- <EXTRA_ARGS>

By default the script enters the  CI container and drops you to bash shell, but you can choose
one of the commands to run specific actions instead.

Add --help after each command to see details:

Commands without arguments:
"
    for subcommand in ${_breeze_commands}; do
        printf "  %-40s %s\n" "${subcommand}" "$(breeze::get_usage "${subcommand}")"
    done
    echo "
Commands with arguments:
"
    # shellcheck disable=SC2154
    for subcommand in ${_breeze_extra_arg_commands}; do
        printf "  %-30s%-10s %s\n" "${subcommand}" "<ARG>" "$(breeze::get_usage "${subcommand}")"
    done
    echo "
Help commands:
"
    # shellcheck disable=SC2154
    for subcommand in ${_breeze_help_commands}; do
        printf "  %-40s %s\n" "${subcommand}" "$(breeze::get_usage "${subcommand}")"
    done
    echo
}

#######################################################################################################
#
# Prints detailed usage for command specified
#
# Argument:
#    Command name.
#
# Outputs:
#    Detailed  usage information for the command
#######################################################################################################
# Prints detailed usage for command specified
function breeze::detailed_usage() {
    subcommand=${1}
    echo "

Detailed usage for command: ${subcommand}

$(breeze::get_detailed_usage "${subcommand}")

"
}

#######################################################################################################
#
# Prints flag footer - common to all commands..
#
# Outputs:
#    Footer common for all commands.
#######################################################################################################
function breeze::flag_footer() {
    echo "
Run '${CMDNAME} flags' to see all applicable flags.
"
}

#######################################################################################################
#
# Prints flags for different variants of airflow to use
#
# Global constants used:
#       FORMATTED_PYTHON_MAJOR_MINOR_VERSIONS
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_airflow_variants() {
    echo "
-p, --python <PYTHON_MAJOR_MINOR_VERSION>
        Python version used for the image. This is always major/minor version.

        Note that versions 2.7 and 3.5 are only valid when installing Airflow 1.10 with
        --install-airflow-version or --install-airflow-reference flags.

        One of:

${FORMATTED_PYTHON_MAJOR_MINOR_VERSIONS}
"
}

#######################################################################################################
#
# Prints flags for different backend to use
#
# Global constants used:
#       FORMATTED_BACKENDS
#       FORMATTED_POSTGRES_VERSIONS
#       FORMATTED_MYSQL_VERSIONS
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_backend_variants() {
    echo "
-b, --backend <BACKEND>
        Backend to use for tests - it determines which database is used.
        One of:

${FORMATTED_BACKENDS}

        Default: ${_breeze_default_backend:=}

--postgres-version <POSTGRES_VERSION>
        Postgres version used. One of:

${FORMATTED_POSTGRES_VERSIONS}

--mysql-version <MYSQL_VERSION>
        Mysql version used. One of:

${FORMATTED_MYSQL_VERSIONS}
"
}

#######################################################################################################
#
# Prints production image flags
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_production_image() {
    echo "
-I, --production-image
        Use production image for entering the environment and builds (not for tests).
"
}

#######################################################################################################
#
# Prints additional breeze action flags
#
# Global constants used:
#       FORMATTED_INTEGRATIONS
#
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_breeze_actions() {
    echo "
-d, --db-reset
        Resets the database at entry to the environment. It will drop all the tables
        and data and recreate the DB from scratch even if 'restart' command was not used.
        Combined with 'restart' command it enters the environment in the state that is
        ready to start Airflow webserver/scheduler/worker. Without the switch, the database
        does not have any tables and you need to run reset db manually.

-i, --integration <INTEGRATION>
        Integration to start during tests - it determines which integrations are started
        for integration tests. There can be more than one integration started, or all to
        start all integrations. Selected integrations are not saved for future execution.
        One of:

${FORMATTED_INTEGRATIONS}

--start-airflow
        Starts the Airflow Scheduler and Webserver in two tmux panes, a third one will be
        available for the usual use cases. In case the database is not initialized it will
        run also 'airflow db init' and create an Admin user with credentials admin/admin.

--init-script <INIT_SCRIPT_FILE>
        Initialization script name - Sourced from files/airflow-breeze-config. Default value
        init.sh. It will be executed after the environment is configured and started (in case
        --start-airflow is used).

"
}

#######################################################################################################
#
# Prints Kubernetes action flags
#
# Global constants used:
#       FORMATTED_KUBERNETES_MODE
#       FORMATTED_KUBERNETES_VERSIONS
#       FORMATTED_KIND_VERSIONS
#       FORMATTED_HELM_VERSIONS
#
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_kubernetes_configuration() {
    echo "
Configuration for the KinD Kubernetes cluster and tests:

-K, --kubernetes-mode <KUBERNETES_MODE>
        Kubernetes mode - only used in case one of kind-cluster commands is used.
        One of:

${FORMATTED_KUBERNETES_MODES}

        Default: ${_breeze_default_kubernetes_mode:=}

-V, --kubernetes-version <KUBERNETES_VERSION>
        Kubernetes version - only used in case one of kind-cluster commands is used.
        One of:

${FORMATTED_KUBERNETES_VERSIONS}

        Default: ${_breeze_default_kubernetes_version:=}

--kind-version <KIND_VERSION>
        Kind version - only used in case one of kind-cluster commands is used.
        One of:

${FORMATTED_KIND_VERSIONS}

        Default: ${_breeze_default_kind_version:=}

--helm-version <HELM_VERSION>
        Helm version - only used in case one of kind-cluster commands is used.
        One of:

${FORMATTED_HELM_VERSIONS}

        Default: ${_breeze_default_helm_version:=}

"
}

#######################################################################################################
#
# Prints flags that determine what is the source mounting scheme
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_local_file_mounting() {
    echo "
-l, --skip-mounting-local-sources
        Skips mounting local volume with sources - you get exactly what is in the
        docker image rather than your current local sources of Airflow.
"
}

#######################################################################################################
#
# Prints flags that allow to choose different airflow variants
#
# Global constants used:
#       FORMATTED_INSTALL_AIRFLOW_VERSIONS
#
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_choose_different_airflow_version() {
    echo "
-a, --install-airflow-version <INSTALL_AIRFLOW_VERSION>
        If specified, installs Airflow directly from PIP released version. This happens at
        image building time in production image and at container entering time for CI image. One of:

${FORMATTED_INSTALL_AIRFLOW_VERSIONS}

-t, --install-airflow-reference <INSTALL_AIRFLOW_REFERENCE>
        If specified, installs Airflow directly from reference in GitHub. This happens at
        image building time in production image and at container entering time for CI image.
"
}

#######################################################################################################
#
# Prints flags that allow to set assumed answers to questions
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_assume_answers_to_questions() {
    echo "
-y, --assume-yes
        Assume 'yes' answer to all questions.

-n, --assume-no
        Assume 'no' answer to all questions.

-q, --assume-quit
        Assume 'quit' answer to all questions.
"
}

#######################################################################################################
#
# Prints flags that are used for credential forwarding
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_credentials() {
    echo "
-f, --forward-credentials
        Forwards host credentials to docker container. Use with care as it will make
        your credentials available to everything you install in Docker.
"
}

#######################################################################################################
#
# Prints flags that control verbosity
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_verbosity() {
    echo "
-v, --verbose
        Show verbose information about executed docker, kind, kubectl, helm commands. Useful for
        debugging - when you run breeze with --verbose flags you will be able to see the commands
        executed under the hood and copy&paste them to your terminal to debug them more easily.

        Note that you can further increase verbosity and see all the commands executed by breeze
        by running 'export VERBOSE_COMMANDS=\"true\"' before running breeze.
"
}

#######################################################################################################
#
# Prints information about help flag
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_help() {
    echo "
-h, --help
        Shows detailed help message for the command specified.
"
}

#######################################################################################################
#
# Prints flags controlling docker build process
#
# Global constants used:
#       FORMATTED_DEFAULT_CI_EXTRAS
#       FORMATTED_DEFAULT_PROD_EXTRAS
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_build_docker_images() {
    echo "
-F, --force-build-images
        Forces building of the local docker images. The images are rebuilt
        automatically for the first time or when changes are detected in
        package-related files, but you can force it using this flag.

-P, --force-pull-images
        Forces pulling of images from DockerHub before building to populate cache. The
        images are pulled by default only for the first time you run the
        environment, later the locally build images are used as cache.

-E, --extras
        Extras to pass to build images The default are different for CI and production images:

        CI image:
${FORMATTED_DEFAULT_CI_EXTRAS}

        Production image:
${FORMATTED_DEFAULT_PROD_EXTRAS}

--additional-extras
        Additional extras to pass to build images The default is no additional extras.

--additional-python-deps
        Additional python dependencies to use when building the images.

--additional-dev-deps
        Additional apt dev dependencies to use when building the images.

--additional-runtime-deps
        Additional apt runtime dependencies to use when building the images.

-C, --force-clean-images
        Force build images with cache disabled. This will remove the pulled or build images
        and start building images from scratch. This might take a long time.

-r, --skip-rebuild-check
        Skips checking image for rebuilds. It will use whatever image is available locally/pulled.

-L, --build-cache-local
        Uses local cache to build images. No pulled images will be used, but results of local
        builds in the Docker cache are used instead. This will take longer than when the pulled
        cache is used for the first time, but subsequent '--build-cache-local' builds will be
        faster as they will use mostly the locally build cache.

        This is default strategy used by the Production image builds.

-U, --build-cache-pulled
        Uses images pulled from registry (either DockerHub or GitHub depending on
        --github-registry flag) to build images. The pulled images will be used as cache.
        Those builds are usually faster than when ''--build-cache-local'' with the exception if
        the registry images are not yet updated. The DockerHub images are updated nightly and the
        GitHub images are updated after merges to master so it might be that the images are still
        outdated vs. the latest version of the Dockerfiles you are using. In this case, the
        ''--build-cache-local'' might be faster, especially if you iterate and change the
        Dockerfiles yourself.

        This is default strategy used by the CI image builds.

-X, --build-cache-disabled
        Disables cache during docker builds. This is useful if you want to make sure you want to
        rebuild everything from scratch.

        This strategy is used by default for both Production and CI images for the scheduled
        (nightly) builds in CI.

"
}

#######################################################################################################
#
# Prints flags controlling docker pull and push process
#
# Global constants used:
#       _breeze_default_dockerhub_user
#       _breeze_default_dockerhub_repo
#       _breeze_default_github_repository
#       _breeze_default_github_image_id
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_pull_push_docker_images() {
    echo "
-D, --dockerhub-user
        DockerHub user used to pull, push and build images. Default: ${_breeze_default_dockerhub_user:=}.

-H, --dockerhub-repo
        DockerHub repository used to pull, push, build images. Default: ${_breeze_default_dockerhub_repo:=}.

-c, --github-registry
        If GitHub registry is enabled, pulls and pushes are done from the GitHub registry not
        DockerHub. You need to be logged in to the registry in order to be able to pull/push from
        and you need to be committer to push to Apache Airflow' GitHub registry.

-g, --github-repository
        GitHub repository used to pull, push images when cache is used.
        Default: ${_breeze_default_github_repository:=}.

        If you use this flag, automatically --github-registry flag is enabled.

-s, --github-image-id <COMMIT_SHA>|<RUN_ID>
        <RUN_ID> or <COMMIT_SHA> of the image. Images in GitHub registry are stored with those
        to be able to easily find the image for particular CI runs. Once you know the
        <RUN_ID> or <COMMIT_SHA>, you can specify it in github-image-id flag and Breeze will
        automatically pull and use that image so that you can easily reproduce a problem
        that occurred in CI.

        If you use this flag, automatically --github-registry is enabled.

        Default: ${_breeze_default_github_image_id:=}.

"
}

#######################################################################################################
#
# Prints flags that control version of generated packages
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flag_version_suffix() {
    echo "
-S, --version-suffix-for-pypi
        Adds optional suffix to the version in the generated backport package. It can be used
        to generate rc1/rc2 ... versions of the packages to be uploaded to PyPI.

-N, --version-suffix-for-svn
        Adds optional suffix to the generated names of package. It can be used to generate
        rc1/rc2 ... versions of the packages to be uploaded to SVN.
"
}

#######################################################################################################
#
# Prints all flags
#
# Outputs:
#    Flag information.
#######################################################################################################
function breeze::flags() {
    echo "
$(breeze::print_line)

Summary of all flags supported by Breeze:

$(breeze::print_star_line)
 Choose Airflow variant
$(breeze::flag_airflow_variants)

$(breeze::print_star_line)
 Choose backend to run for Airflow
$(breeze::flag_backend_variants)

$(breeze::print_star_line)
 Enable production image
$(breeze::flag_production_image)

$(breeze::print_star_line)
 Additional actions executed while entering breeze
$(breeze::flag_breeze_actions)

$(breeze::print_star_line)
 Kind kubernetes and Kubernetes tests configuration(optional)
$(breeze::flag_kubernetes_configuration)

$(breeze::print_star_line)
 Manage mounting local files
$(breeze::flag_local_file_mounting)

$(breeze::print_star_line)
 Assume answers to questions
$(breeze::flag_assume_answers_to_questions)

$(breeze::print_star_line)
 Choose different Airflow version to install or run
$(breeze::flag_choose_different_airflow_version)

$(breeze::print_star_line)
 Credentials
$(breeze::flag_credentials)

$(breeze::print_star_line)
 Flags for building Docker images (both CI and production)
$(breeze::flag_build_docker_images)

$(breeze::print_star_line)
 Flags for pulling/pushing Docker images (both CI and production)
$(breeze::flag_pull_push_docker_images)

$(breeze::print_star_line)
 Flags for generation of the backport packages
$(breeze::flag_version_suffix)

$(breeze::print_star_line)
 Increase verbosity of the scripts
$(breeze::flag_verbosity)

$(breeze::print_star_line)
 Print detailed help message
$(breeze::flag_help)
"
}

#######################################################################################################
#
# Prints header line filling screen indented_screen_width - only when VERBOSE is set
#
# Outputs:
#    Prints header line.
#######################################################################################################
function breeze::print_header_line() {
    if [ ${VERBOSE:="false"} == "true" ]; then
        echo
        printf '=%.0s' $(seq "${SCREEN_WIDTH}")
        echo
    fi
}

#######################################################################################################
#
# Prints separation line filling screen indented_screen_width
#
# Outputs:
#    Prints line.
#######################################################################################################
function breeze::print_line() {
    printf '#%.0s' $(seq "${SCREEN_WIDTH}")
}

# Prints star line filling screen indented_screen_width
function breeze::print_star_line() {
    printf '*%.0s' $(seq "${SCREEN_WIDTH}")
}

#######################################################################################################
#
# Reads saved environment variables. Some of the variables are stored across session so that once
# you use them you do not have to use it next time. That makes those flags persistent.
#
# An example of it is `--backend` or '--kubernetes-mode' flags.
#
# Note that PYTHON_MAJOR_MINOR_VERSION is not read here - it is read at the
# `setup_default_breeze_variables` method because it is needed
# to determine the right images to use and set several variables that depend on the Python version
#
# Uses:
#   _breeze_default_* corresponding defaults for variables it reads
#
# Modified and used global constants:
#
#   BACKEND
#   KUBERNETES_MODE
#   KUBERNETES_VERSION
#   KIND_VERSION
#   HELM_VERSION
#   POSTGRES_VERSION
#   MYSQL_VERSION
#   DOCKERHUB_USER
#   DOCKERHUB_REPO
#
#######################################################################################################

function breeze::read_saved_environment_variables() {
    BACKEND="${BACKEND:=$(parameters::read_from_file BACKEND)}"
    BACKEND=${BACKEND:-${_breeze_default_backend}}

    KUBERNETES_MODE="${KUBERNETES_MODE:=$(parameters::read_from_file KUBERNETES_MODE)}"
    KUBERNETES_MODE=${KUBERNETES_MODE:=${_breeze_default_kubernetes_mode}}

    KUBERNETES_VERSION="${KUBERNETES_VERSION:=$(parameters::read_from_file KUBERNETES_VERSION)}"
    KUBERNETES_VERSION=${KUBERNETES_VERSION:=${_breeze_default_kubernetes_version}}

    KIND_VERSION="${KIND_VERSION:=$(parameters::read_from_file KIND_VERSION)}"
    KIND_VERSION=${KIND_VERSION:=${_breeze_default_kind_version}}

    HELM_VERSION="${HELM_VERSION:=$(parameters::read_from_file HELM_VERSION)}"
    HELM_VERSION=${HELM_VERSION:=${_breeze_default_helm_version}}

    POSTGRES_VERSION="${POSTGRES_VERSION:=$(parameters::read_from_file POSTGRES_VERSION)}"
    POSTGRES_VERSION=${POSTGRES_VERSION:=${_breeze_default_postgres_version}}

    MYSQL_VERSION="${MYSQL_VERSION:=$(parameters::read_from_file MYSQL_VERSION)}"
    MYSQL_VERSION=${MYSQL_VERSION:=${_breeze_default_mysql_version}}

    # Here you read DockerHub user/account that you use
    # You can populate your own images in DockerHub this way and work with the,
    # You can override it with "--dockerhub-user" option and it will be stored in .build directory
    DOCKERHUB_USER="${DOCKERHUB_USER:=$(parameters::read_from_file DOCKERHUB_USER)}"
    DOCKERHUB_USER="${DOCKERHUB_USER:=${_breeze_default_dockerhub_user}}"

    # Here you read DockerHub repo that you use
    # You can populate your own images in DockerHub this way and work with them
    # You can override it with "--dockerhub-repo" option and it will be stored in .build directory
    DOCKERHUB_REPO="${DOCKERHUB_REPO:=$(parameters::read_from_file DOCKERHUB_REPO)}"
    DOCKERHUB_REPO="${DOCKERHUB_REPO:=${_breeze_default_dockerhub_repo}}"
}

#######################################################################################################
#
# Checks if variables are correctly set and if they are - saves them so that they can be used across
# sessions. In case we are installing Airflow 1.10, the constants are set to match 1.10 line.
#
# In case the variables are matching expected values they are saved in ".build/VARIABLE_NAME" for
# later reuse. If not, error is printed and the saved file is cleaned, so that next time
# default value can be used.
#
# Used Global constants:
#     INSTALL_AIRFLOW_REFERENCE
#     INSTALL_AIRFLOW_VERSION
#     BACKEND
#     KUBERNETES_MODE
#     KUBERNETES_VERSION
#     KIND_VERSION
#     HELM_VERSION
#     POSTGRES_VERSION
#     MYSQL_VERSION
#     DOCKERHUB_USER
#     DOCKERHUB_REPO
#
# Updated Global constants:
#      BRANCH_NAME
#
# Output: saved variable files in .build,
#######################################################################################################
function breeze::check_and_save_all_params() {
    parameters::check_and_save_allowed_param "PYTHON_MAJOR_MINOR_VERSION" "Python version" "--python"

    if [[ -n "${INSTALL_AIRFLOW_REFERENCE=}" ]]; then
        if [[ ${INSTALL_AIRFLOW_REFERENCE=} == *1_10* ]]; then
            export BRANCH_NAME="v1-10-test"
        fi
    elif [[ -n "${INSTALL_AIRFLOW_VERSION=}" ]]; then
        if [[ ${INSTALL_AIRFLOW_VERSION=} == *1.10* ]]; then
            export BRANCH_NAME="v1-10-test"
        fi
    fi

    if [[ ${PYTHON_MAJOR_MINOR_VERSION} == "2.7" || ${PYTHON_MAJOR_MINOR_VERSION} == "3.5" ]]; then
        if [[ ${BRANCH_NAME} == "master" ]]; then
            echo >&2
            echo >&2 "The ${PYTHON_MAJOR_MINOR_VERSION} can only be used when installing Airflow 1.10.*"
            echo >&2
            echo >&2 "You can use it only when you specify 1.10 Airflow via --install-airflow-version"
            echo >&2 "or --install-airflow-reference and they point to 1.10 version of Airflow"
            echo >&2
            exit 1
        fi
    fi

    parameters::check_and_save_allowed_param "BACKEND" "backend" "--backend"
    parameters::check_and_save_allowed_param "KUBERNETES_MODE" "Kubernetes mode" "--kubernetes-mode"
    parameters::check_and_save_allowed_param "KUBERNETES_VERSION" "Kubernetes version" "--kubernetes-version"
    parameters::check_and_save_allowed_param "KIND_VERSION" "KinD version" "--kind-version"
    parameters::check_and_save_allowed_param "HELM_VERSION" "Helm version" "--helm-version"
    parameters::check_and_save_allowed_param "POSTGRES_VERSION" "Postgres version" "--postgres-version"
    parameters::check_and_save_allowed_param "MYSQL_VERSION" "Mysql version" "--mysql-version"

    # Can't verify those - they can be anything, so let's just save them
    parameters::save_to_file DOCKERHUB_USER
    parameters::save_to_file DOCKERHUB_REPO
}

#######################################################################################################
#
# Prints cheatsheet if it is not suppressed
#
# Used global constants:
#
#     AIRFLOW_SOURCES
#     WEBSERVER_HOST_PORT
#     POSTGRES_HOST_PORT
#     MYSQL_HOST_PORT
#
#######################################################################################################
function breeze::print_cheatsheet() {
    if [[ ! -f ${SUPPRESS_CHEATSHEET_FILE} && ${command_to_run} == "enter_breeze" ]]; then
        echo
        echo
        breeze::print_line
        echo
        echo "                                  Airflow Breeze CHEATSHEET"
        echo
        set +e
        if ! command -v breeze; then
            breeze::print_line
            echo
            echo " Adding breeze to your path:"
            echo "    When you exit the environment, you can add sources of Airflow to the path - you can"
            echo "    run breeze or the scripts above from any directory by calling 'breeze' commands directly"
            echo
            echo "     export PATH=\${PATH}:\"${AIRFLOW_SOURCES}\""
            echo
        fi
        set -e
        breeze::print_line

        echo
        echo " Port forwarding:"
        echo
        echo "   Ports are forwarded to the running docker containers for webserver and database"
        echo "     * ${WEBSERVER_HOST_PORT} -> forwarded to Airflow webserver -> airflow:8080"
        echo "     * ${POSTGRES_HOST_PORT} -> forwarded to Postgres database -> postgres:5432"
        echo "     * ${MYSQL_HOST_PORT} -> forwarded to MySQL database  -> mysql:3306"
        echo
        echo "   Here are links to those services that you can use on host:"
        echo "     * Webserver: http://127.0.0.1:28080"
        echo "     * Postgres:  jdbc:postgresql://127.0.0.1:25433/airflow?user=postgres&password=airflow"
        echo "     * Mysql:     jdbc:mysql://localhost:23306/airflow?user=root"
        echo
    else
        echo
    fi
}

#######################################################################################################
#
# Prints setup instruction in case we find that autocomplete is not set
# also prints how to toggle asciiart/cheatsheet
#
# Used global constants:
#     CMDNAME
#######################################################################################################
function breeze::print_setup_instructions() {
    if [[ ${command_to_run} == "enter_breeze" ]]; then
        # shellcheck disable=SC2034  # Unused variables left for comp_breeze usage
        if ! typeset -f "_comp_breeze" >/dev/null; then
            breeze::print_line
            echo
            echo "  You can setup autocomplete by running '${CMDNAME} setup-autocomplete'"
            echo
            echo
        fi
        breeze::print_line
        echo
        echo "  You can toggle ascii/cheatsheet by running:"
        echo "      * ${CMDNAME} toggle-suppress-cheatsheet"
        echo "      * ${CMDNAME} toggle-suppress-asciiart"
        echo
        breeze::print_line
        echo
        echo
        echo
        echo
    fi
}

#######################################################################################################
#
# Checks that pre-commit is installed and upgrades it if needed
# this is used in case static check command is used.
#
#######################################################################################################
function breeze::make_sure_precommit_is_installed() {
    echo
    echo "Making sure pre-commit is installed"
    echo
    local pip_binary
    if command -v pip3 >/dev/null; then
        pip_binary=pip3
    elif command -v pip >/dev/null; then
        pip_binary=pip
    else
        echo >&2
        echo >&2 "ERROR: You need to have pip or pip3 in your PATH"
        echo >&2
        S
        exit 1
    fi
    "${pip_binary}" install --upgrade pre-commit >/dev/null 2>&1
    # Add ~/.local/bin to the path in case pip is run outside of virtualenv
    export PATH="${PATH}":~/.local/bin
}

#######################################################################################################
#
# Removes CI and PROD images and cleans up the flag that indicates that the image was already built
#
# Used global constants:
#    PYTHON_BASE_IMAGE
#    AIRFLOW_CI_IMAGE
#    AIRFLOW_PROD_IMAGE
#    BUILT_CI_IMAGE_FLAG_FILE
#
#######################################################################################################
function breeze::remove_images() {
    set +e
    docker rmi "${PYTHON_BASE_IMAGE}"  2>/dev/null >/dev/null
    docker rmi "${AIRFLOW_CI_IMAGE}"   2>/dev/null >/dev/null
    docker rmi "${AIRFLOW_PROD_IMAGE}" 2>/dev/null >/dev/null
    set -e
    echo
    echo "###################################################################"
    echo "NOTE!! Removed Airflow images for Python version ${PYTHON_MAJOR_MINOR_VERSION}."
    echo "       But the disk space in docker will be reclaimed only after"
    echo "       running 'docker system prune' command."
    echo "###################################################################"
    echo
    rm -f "${BUILT_CI_IMAGE_FLAG_FILE}"
}

#######################################################################################################
#
# Runs chosen static checks
#
# Uses variables:
#   static_check
#
#######################################################################################################
function breeze::run_static_checks() {
    if [[ ${static_check} == "all" ]]; then
        echo
        echo "Running: pre-commit run" "${EXTRA_STATIC_CHECK_OPTIONS[@]}" "$@"
        echo
        pre-commit run "${EXTRA_STATIC_CHECK_OPTIONS[@]}" "$@"
    elif [[ ${static_check} == "all-but-pylint" ]]; then
        echo
        echo "Setting SKIP=pylint. Running: pre-commit run" "${EXTRA_STATIC_CHECK_OPTIONS[@]}" "$@"
        echo
        echo
        SKIP=pylint pre-commit run "${EXTRA_STATIC_CHECK_OPTIONS[@]}" "$@"
    else
        if [[ ${static_check} == *"pylint"* || ${static_check} == *"mypy"* || ${static_check} == *"flake8"* ]]; then
            echo
            echo "Running build pre-commit before running the requested static check"
            echo
            pre-commit run "build"
        fi
        echo
        echo "Running: pre-commit run" "${static_check}" "${EXTRA_STATIC_CHECK_OPTIONS[@]}" "$@"
        echo
        pre-commit run "${static_check}" "${EXTRA_STATIC_CHECK_OPTIONS[@]}" "$@"
    fi
}

#######################################################################################################
#
# Runs Build before a command if needed - the right build command will be determined and used
# depending on which command you are trying ton
#
# Used global constants:
#   PRODUCTION_IMAGE
#   KIND_CLUSTER_OPERATION
#   FORMATTED_KIND_OPERATIONS
#
# Used variables:
#   command_to_run
#
#######################################################################################################
function breeze::run_build_command() {
    case "${command_to_run}" in
    run_tests | run_docker_compose)
        build_images::prepare_ci_build
        build_images::rebuild_ci_image_if_needed
        ;;
    enter_breeze)
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            build_images::prepare_prod_build
        else
            build_images::prepare_ci_build
            build_images::rebuild_ci_image_if_needed
        fi
        ;;
    build_docs | perform_static_checks | perform_generate_constraints | perform_prepare_backport_readme | perform_prepare_backport_packages)
        build_images::prepare_ci_build
        build_images::rebuild_ci_image_if_needed
        ;;
    perform_push_image)
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            build_images::prepare_prod_build
        else
            build_images::prepare_ci_build
            build_images::rebuild_ci_image_if_needed
        fi
        ;;
    build_image)
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            build_images::prepare_prod_build
            build_images::build_prod_images
        else
            build_images::prepare_ci_build
            md5sum::calculate_md5sum_for_all_files
            build_images::build_ci_image
            md5sum::update_all_md5
            build_images::build_ci_image_manifest
        fi
        ;;
    cleanup_image | run_exec)
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            build_images::prepare_prod_build
        else
            build_images::prepare_ci_build
        fi
        ;;
    perform_initialize_local_virtualenv | perform_setup_autocomplete | toggle_suppress_cheatsheet | toggle_suppress_asciiart ) ;;

    manage_kind_cluster)
        if [[ ${KIND_CLUSTER_OPERATION} == "start" ]]; then
            echo "Starts KinD cluster"
        elif [[ ${KIND_CLUSTER_OPERATION} == "stop" ]]; then
            echo "Stops KinD cluster"
        elif [[ ${KIND_CLUSTER_OPERATION} == "restart" ]]; then
            echo "Restarts KinD cluster"
        elif [[ ${KIND_CLUSTER_OPERATION} == "recreate" ]]; then
            echo "Recreates KinD cluster"
        elif [[ ${KIND_CLUSTER_OPERATION} == "status" ]]; then
            echo "Checks status of KinD cluster"
        elif [[ ${KIND_CLUSTER_OPERATION} == "deploy" ]]; then
            echo "Deploys Airflow to KinD cluster"
            build_images::prepare_prod_build
            build_images::build_prod_images
        elif [[ ${KIND_CLUSTER_OPERATION} == "test" ]]; then
            echo "Run Kubernetes tests with the KinD cluster "
        elif [[ ${KIND_CLUSTER_OPERATION} == "shell" ]]; then
            echo "Enter an interactive shell for kubernetes testing"
        elif [[ -z ${KIND_CLUSTER_OPERATION=} ]]; then
            echo
            echo "Please provide an operation to run"
            echo
            echo "Should be one of:"
            echo "${FORMATTED_KIND_OPERATIONS}"
            echo
            exit 1
        else
            echo
            echo "ERROR: Unknown Kind Kubernetes cluster operation: '${KIND_CLUSTER_OPERATION}'"
            echo
            echo "Should be one of:"
            echo "${FORMATTED_KIND_OPERATIONS}"
            echo
            exit 1
        fi
        ;;
    *)
        echo >&2
        echo >&2 "ERROR: Unknown command to run ${command_to_run}"
        echo >&2
        exit 1
        ;;
    esac
}

#######################################################################################################
#
# Runs the actual command - depending on the command chosen it will use the right
# Convenient script and run the right command for the script.
#
# Used variables:
#   command_to_run
#
# Used global constants:
#     PRODUCTION_IMAGE
#     SCRIPTS_CI_DIR
#     BUILD_CACHE_DIR
#     KIND_CLUSTER_OPERATION
#     EXTRA_DC_OPTIONS
#
# Set Global variables:
#     RUN_TESTS
#######################################################################################################
function breeze::run_breeze_command() {
    set +u
    local dc_run_file
    if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
        dc_run_file="${BUILD_CACHE_DIR}/${DOCKER_COMPOSE_RUN_SCRIPT_FOR_PROD}"
    else
        dc_run_file="${BUILD_CACHE_DIR}/${DOCKER_COMPOSE_RUN_SCRIPT_FOR_CI}"
    fi
    case "${command_to_run}" in
    enter_breeze)
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            "${dc_run_file}" run --service-ports --rm airflow "${@}"
            "${SCRIPTS_CI_DIR}/tools/ci_fix_ownership.sh"
        else
            "${dc_run_file}" run --service-ports --rm airflow "${@}"
            "${SCRIPTS_CI_DIR}/tools/ci_fix_ownership.sh"
            "${SCRIPTS_CI_DIR}/tools/ci_clear_tmp.sh"
        fi
        ;;
    run_exec)
        # Unfortunately `docker-compose exec` does not support exec'ing into containers started with run :(
        # so we have to find it manually
        set +e
        local airflow_testing_container
        airflow_testing_container=$("${dc_run_file}" ps | grep airflow | awk '{print $1}' 2>/dev/null)
        : "${airflow_testing_container:?"ERROR! Breeze must be running in order to exec into running container"}"
        set -e
        docker exec -it "${airflow_testing_container}" \
            "/opt/airflow/scripts/in_container/entrypoint_exec.sh" "${@}"
        ;;
    run_tests)
        export RUN_TESTS="true"
        readonly RUN_TESTS
        "${BUILD_CACHE_DIR}/${DOCKER_COMPOSE_RUN_SCRIPT_FOR_CI}" run --service-ports --rm airflow "$@"
        ;;
    run_docker_compose)
        set +u
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            dc_run_file="${BUILD_CACHE_DIR}/${DOCKER_COMPOSE_RUN_SCRIPT_FOR_PROD}"
        else
            dc_run_file="${BUILD_CACHE_DIR}/${DOCKER_COMPOSE_RUN_SCRIPT_FOR_CI}"
        fi
        "${dc_run_file}" "${docker_compose_command}" "${EXTRA_DC_OPTIONS[@]}" "$@"
        set -u
        ;;
    perform_static_checks)
        breeze::make_sure_precommit_is_installed
        breeze::run_static_checks "${@}"
        ;;
    build_image) ;;

    cleanup_image)
        breeze::remove_images
        ;;
    perform_generate_constraints)
        runs::run_generate_constraints
        ;;
    perform_prepare_backport_packages)
        runs::run_prepare_backport_packages "${@}"
        ;;
    perform_prepare_backport_readme)
        runs::run_prepare_backport_readme "${@}"
        ;;
    perform_push_image)
        if [[ ${PRODUCTION_IMAGE} == "true" ]]; then
            push_pull_remove_images::push_prod_images
        else
            push_pull_remove_images::push_ci_images
        fi
        ;;
    perform_initialize_local_virtualenv)
        breeze::initialize_virtualenv
        ;;
    perform_setup_autocomplete)
        breeze::setup_autocomplete
        ;;
    manage_kind_cluster)
        kind::make_sure_kubernetes_tools_are_installed
        kind::get_kind_cluster_name
        kind::perform_kind_cluster_operation "${KIND_CLUSTER_OPERATION}"
        ;;
    build_docs)
        runs::run_docs "${@}"
        ;;
    toggle_suppress_cheatsheet)
        if [[ -f "${SUPPRESS_CHEATSHEET_FILE}" ]]; then
            echo
            echo "Cheatsheet disabled"
            echo
        else
            echo
            echo "Cheatsheet enabled"
            echo
        fi
        ;;
    toggle_suppress_asciiart)
        if [[ -f "${SUPPRESS_ASCIIART_FILE}" ]]; then
            echo
            echo "ASCIIart disabled"
            echo
        else
            echo
            echo "ASCIIart enabled"
            echo
        fi
        ;;
    *)
        echo >&2
        echo >&2 "ERROR: Unknown command to run ${command_to_run}"
        echo >&2
        ;;
    esac
    set -u
}

#######################################################################################################
#
# We have different versions of images depending on the python version used. We keep up with the
# Latest patch-level changes in Python (this is done automatically during CI builds) so we have
# To only take into account MAJOR and MINOR version of python. This variable keeps the major/minor
# version of python in X.Y format (3.6, 3.7, 3.8 etc).
#
# In Breeze the precedence of setting the version is as follows:
#      1. --python flag (if set, it will explicitly override it in the next step)
#      2. PYTHON_MAJOR_MINOR_VERSION exported from outside
#      3. last used version stored in ./build/PYTHON_MAJOR_MINOR_VERSION
#      4. DEFAULT_PYTHON_MAJOR_MINOR_VERSION from scripts/ci/libraries/_initialization.sh
#
# Here points 2. and 3. are realised. If result is empty string , the 4. will be set in
#      the next step (sanity_checks::basic_sanity_checks() is called and the version is still not set by then)
#      finally, if  --python flag is specified, it will override whatever is set above.
#
# We need to run after initialization::initialize_common_environment (so that parameters::read_from_file function is present)
# But before we set the default value for Python
#
# Used and modified global constants:
#     PYTHON_MAJOR_MINOR_VERSION
#######################################################################################################
function breeze::determine_python_version_to_use_in_breeze() {
    PYTHON_MAJOR_MINOR_VERSION="${PYTHON_MAJOR_MINOR_VERSION:=$(parameters::read_from_file PYTHON_MAJOR_MINOR_VERSION)}"
    export PYTHON_MAJOR_MINOR_VERSION
}


breeze::setup_default_breeze_constants

initialization::initialize_common_environment

breeze::determine_python_version_to_use_in_breeze

sanity_checks::basic_sanity_checks

start_end::script_start

traps::add_trap start_end::script_end EXIT

breeze::prepare_formatted_versions

breeze::prepare_usage

set +u
breeze::parse_arguments "${@}"

breeze::print_header_line

build_images::forget_last_answer

breeze::read_saved_environment_variables

breeze::check_and_save_all_params

build_images::determine_docker_cache_strategy

build_images::get_docker_image_names

initialization::make_constants_read_only

sanity_checks::sanitize_mounted_files

breeze::prepare_command_files

breeze::run_build_command

breeze::print_header_line

breeze::print_badge

breeze::print_cheatsheet

breeze::print_setup_instructions

set +u # Account for an empty array
breeze::run_breeze_command "${REMAINING_ARGS[@]}"

set +u # Account for an empty array
if [[ -n ${second_command_to_run} ]]; then
    command_to_run=${second_command_to_run}
    breeze::run_breeze_command "${REMAINING_ARGS[@]}"
fi