plugins/age_days_lt/__init__.py

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"""
The age_in_days plugin adds a Jinja test, age_days_lt.

It is intended to be used in Pelican templates like this to select articles newer than 90 days:

    {% for article in (articles | selectattr("date", "age_days_lt", 90) ) %}
        ...
    {% endif %}
"""
from pelican import signals
from . import agedayslt

def add_test(pelican):
    """Add age_days_lt test to Pelican."""
    pelican.env.tests.update({'age_days_lt': agedayslt.age_days_lt})


def register():
    """Plugin registration."""
    signals.generator_init.connect(add_test)