CalDav Integration - Calender not available after update

[pvillmann]

The problem

after updating to HA Core 2025.1 my calender entity from CalDav integration is not available anymore.
I have already done a reconfiguration etc. but it's still not available

What version of Home Assistant Core has the issue?

core-2025.1.0

What was the last working version of Home Assistant Core?

core-2024.12.5

What type of installation are you running?

Home Assistant OS

Integration causing the issue

caldav

Link to integration documentation on our website

https://www.home-assistant.io/integrations/caldav

Diagnostics information

2025-01-04 08:11:23.188 ERROR (MainThread) [homeassistant.components.caldav.coordinator] Unexpected error fetching CalDAV Persönlicher Kalender data
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 379, in _async_refresh
self.data = await self._async_update_data()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/caldav/coordinator.py", line 96, in _async_update_data
results = await self.hass.async_add_executor_job(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<7 lines>...
)
^
File "/usr/local/lib/python3.13/concurrent/futures/thread.py", line 59, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/local/lib/python3.13/site-packages/caldav/objects.py", line 1105, in search
o.expand_rrule(start, end)
~~~~~~~~~~~~~~^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/caldav/objects.py", line 1796, in expand_rrule
import recurring_ical_events
File "/usr/local/lib/python3.13/site-packages/recurring_ical_events.py", line 1530, in
class CalendarQuery:
...<193 lines>...
raise IndexError("No components found.")
File "/usr/local/lib/python3.13/site-packages/recurring_ical_events.py", line 1547, in CalendarQuery
icalendar.InvalidCalendar,
^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'icalendar' has no attribute 'InvalidCalendar'

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[home-assistant]

caldav documentation
caldav source

[xeor]

There is an issue with importing recurring_ical_events from 2025.1, I have the same issue.

import icalendar works fine.

import recurring_ical_events gives (tested from jupyter shell)

Exception in <jupyter_0> line 1:
    import recurring_ical_events
    ^
AttributeError: module 'icalendar' has no attribute 'InvalidCalendar'

[xeor]

Some additional debugging

• https://github.com/niccokunzmann/python-recurring-ical-events
  • latest version: 3.4.0 (2 weeks ago)

import pkg_resources
pkg_resources.get_distribution("recurring-ical-events").version

shows 3.4.0

recurring_ical_events refers to the missing icalendar.InvalidCalendar which got introduced at niccokunzmann/python-recurring-ical-events@8156e1c about a month ago.

https://github.com/niccokunzmann/python-recurring-ical-events/blob/v3.4.0/requirements.txt#L4 shows icalendar 6.1.0 upto 7.x is supported.

pkg_resources.get_distribution("icalendar").version

shows home-assistant is at 5.0.13.
icalendar on this version worked with recurring_ical_events version 3.3.2.

icalendar in home-assistant should be 6.1.0 tho. See https://github.com/home-assistant/core/blob/2025.1.0/requirements_all.txt#L1181

[xeor]

So it looks like icalevents is the one that depends on 5.0.13, see https://github.com/jazzband/icalevents/blob/master/pyproject.toml#L12

From pipdeptree

icalevents==0.1.29
├── httplib2 [required: >=0.22.0,<0.23.0, installed: 0.22.0]
│   └── pyparsing [required: >=2.4.2,<4,!=3.0.3,!=3.0.2,!=3.0.1,!=3.0.0, installed: 3.2.1]
├── icalendar [required: ==5.0.13, installed: 5.0.13]
│   ├── python-dateutil [required: Any, installed: 2.9.0.post0]
│   │   └── six [required: >=1.5, installed: 1.17.0]
│   └── pytz [required: Any, installed: 2024.2]
├── python-dateutil [required: >=2.9.0,<3.0.0, installed: 2.9.0.post0]
│   └── six [required: >=1.5, installed: 1.17.0]
└── pytz [required: >=2024.1,<2025.0, installed: 2024.2]

# and

caldav==1.3.9
├── icalendar [required: Any, installed: 5.0.13]
│   ├── python-dateutil [required: Any, installed: 2.9.0.post0]
│   │   └── six [required: >=1.5, installed: 1.17.0]
│   └── pytz [required: Any, installed: 2024.2]
├── lxml [required: Any, installed: 5.3.0]
├── pytz [required: Any, installed: 2024.2]
├── recurring-ical-events [required: >=2.0.0, installed: 3.4.0]
│   ├── icalendar [required: >=6.1.0,<7.0.0, installed: 5.0.13]
│   │   ├── python-dateutil [required: Any, installed: 2.9.0.post0]
│   │   │   └── six [required: >=1.5, installed: 1.17.0]
│   │   └── pytz [required: Any, installed: 2024.2]
│   ├── python-dateutil [required: >=2.8.1,<3.0.0, installed: 2.9.0.post0]
│   │   └── six [required: >=1.5, installed: 1.17.0]
│   ├── tzdata [required: Any, installed: 2024.2]
│   └── x-wr-timezone [required: >=1.0.0,<3.0.0, installed: 2.0.0]
│       ├── click [required: Any, installed: 8.1.8]
│       ├── icalendar [required: >=6.1.0, installed: 5.0.13]
│       │   ├── python-dateutil [required: Any, installed: 2.9.0.post0]
│       │   │   └── six [required: >=1.5, installed: 1.17.0]
│       │   └── pytz [required: Any, installed: 2024.2]
│       └── tzdata [required: Any, installed: 2024.2]

The only reference to icalevents dependency that I could find (at least that I had) was https://github.com/mampfes/hacs_waste_collection_schedule, which looks like depends on icalevents.

So; it might be nuking the correct icalendar version and replacing it.. :( Do you have a similar hacs plugin?

[override80]

In my specific case:

calendar:
  - platform: caldav
    username: caldav
    password: !secret caldav
    url: https://nextcloud.xxx.yyy/remote.php/dav
    custom_calendars:
      - name: holiday
        calendar: Holiday
        search: '.*'

It's failing only if the search value contains a regex. I only have all-day events in that calendar. Setting search key to a non-regex values seems not to cause issues.

[pvillmann]

From my side since yesterday the integration works fine, whyever... no update or similar.