Export multiple events from khal in .ics

khal-export.py

#!/usr/bin/env python3
from datetime import datetime

import click
from khal.settings import get_config
from khal.cli import build_collection
from icalendar import Calendar


@click.command()
@click.option('--search', 'search_string')
@click.option('--allow-past/--future-only', default=False)
def main(search_string, allow_past):
    conf = get_config(None)
    collection = build_collection(conf, None)
    now = conf['locale']['local_timezone'].localize(datetime.now())

    vevents = [
        Calendar.from_ical(event.raw)
        for event in sorted(collection.search(search_string))
        if (
            allow_past
            or event.allday and event.end >= now.date()
            or not event.allday and event.end_local >= now
        )
    ]
    event_collection = Calendar(next(iter(vevents), {}))
    for event in vevents:
        for component in event.subcomponents:
            event_collection.add_component(component)

    click.echo(event_collection.to_ical())


if __name__ == '__main__':
    main()