Jinja2 correctly indent included block

Question

I have two files:

base.html

Answer 1

Although I think the increase in document size is a good argument against "correctly" indenting documents, jinja2 actually provides a function to do just what you what:

indent(s, width=4, indentfirst=False)

which you would use in your base.html with a macro, as described in this answer on SO.

I would probably make that a macro anyway and call it render_register_form:

{% macro render_register_form(form) %}
    
Register
    

        {{ form.hidden_tag() }}
        {{ form.login.label }} {{ form.login(size=20) }}
        {{ form.password.label }} {{ form.password(size=20) }}
        
    
{% endmacro %}

and then include it where needed, for example, with 8 spaces indentation, as:

{{ render_register_form(my_form)|indent(8, True) }}