entrypoint.sh

#!/bin/sh
set -eu

# return true if specified directory is empty
directory_empty() {
    [ -z "$(ls -A "$1/")" ]
}

run_as() {
    if [ "$(id -u)" = 0 ]; then
        su -p www-data -s /bin/sh -c "$1"
    else
        sh -c "$1"
    fi
}

# usage: file_env VAR [DEFAULT]
#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
file_env() {
    local var="$1"
    local fileVar="${var}_FILE"
    local def="${2:-}"
    local varValue=$(env | grep -E "^${var}=" | sed -E -e "s/^${var}=//")
    local fileVarValue=$(env | grep -E "^${fileVar}=" | sed -E -e "s/^${fileVar}=//")
    if [ -n "${varValue}" ] && [ -n "${fileVarValue}" ]; then
        echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
        exit 1
    fi
    if [ -n "${varValue}" ]; then
        export "$var"="${varValue}"
    elif [ -n "${fileVarValue}" ]; then
        export "$var"="$(cat "${fileVarValue}")"
    elif [ -n "${def}" ]; then
        export "$var"="$def"
    fi
    unset "$fileVar"
}

if expr "$1" : "apache" 1>/dev/null; then
    if [ -n "${APACHE_DISABLE_REWRITE_IP+x}" ]; then
        a2disconf remoteip
    fi
fi

exec "$@"