{% macro install_debian_packages(packages) -%}
RUN dpkg_apt() { [ -f $1 ] && { dpkg -i $1 || apt-get -y install -f; } || return 1; }; \
    {%- for deb in packages %}
        dpkg_apt /debs/{{ deb }} {%- if not loop.last %} && \ {%- endif %}
    {%- endfor %}
{%- endmacro %}

{% macro install_python_wheels(packages) -%}
RUN cd /python-wheels/ && pip install {{ packages | join(' ') }}
{%- endmacro %}

{% macro copy_files(prefix, files, dest) -%}
COPY \
    {%- for file in files %}
        {{ prefix }}/{{ file }} \
    {%- endfor %}
    {{ dest }}
{%- endmacro %}