pimutils / pimutils/khal

improperly imports events with ancient CREATED entry

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type: 3rd party compatibility type: bug
Dominant language
Python
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Description

khal import fails to import events containing this:

CREATED:00001231T000000T

Judging from internet chatter, such data seemingly originate from Google, and is arguably bogus (RFC 5545 does not explicitly constrain which years can be expressed, but no calendar agent stored the data in an RFC 5545 store in year 0).

The imported data has transformed the event to contain this:

CREATED:None

That data certainly is broken.

If arguably-bogus year-0 data cannot be preserved as-is, then khal should not mangle it into even more broken data.
One better option that some suggest and I find reasonable is to replace year 0 with year 1970. Other less ideal options are to skip the event or to halt the import routine.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the khal import path and reproduce the failure using an event containing CREATED:00001231T000000T. Trace how that value becomes CREATED:None, then check the import behavior against the issue's proposed handling of year 0. Done means the event is no longer mangled into None and the chosen behavior is covered by a regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
cli
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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