{# List containing rendered sections to be included at end #}
{% set openssl_sections = [] %}

{#
List containing one entry for each section name allocated. Because of
scoping rules, we need to use a list so that it can be a "per-render global"
that gets updated in place. Real globals are shared by all templates with the
same environment, and variables defined in the macro don't persist after the
macro invocation ends.
#}
{% set openssl_section_num = [] %}

{% macro section() -%}
{% set name -%}
sec{{ openssl_section_num|length -}}
{% endset -%}
{% do openssl_section_num.append('') -%}
{% set contents %}{{ caller() }}{% endset -%}
{% if contents -%}
{% set sectiondata = formatsection(name, contents) -%}
{% do openssl_sections.append(sectiondata) -%}
{% endif -%}
{{ name -}}
{% endmacro %}

{% macro formatsection(name, contents) -%}
[ {{ name }} ]
{{ contents -}}
{% endmacro %}