* lisp/ox-icalendar.el (org-icalendar-todo-unscheduled-start): New
customization to control the exported start time of unscheduled tasks.
(org-icalendar--rrule): Helper function for RRULE export.
(org-icalendar--vevent): Use the new helper function for RRULE.
(org-icalendar--repeater-type): Helper function to get the repeater
type, and display warning if not supported.
(org-icalendar--vtodo): Change how unscheduled TODOs are handled using
the new customization option. Export SCHEDULED and DEADLINE
repeaters. In case of SCHEDULED repeater and a DEADLINE without
repeater, treat DEADLINE as RRULE UNTIL. Emit a warning for tricky
edge cases that are not yet implemented.
* testing/lisp/test-ox-icalendar.el
(test-ox-icalendar/todo-repeater-shared): Test for exporting shared
SCHEDULED/DEADLINE repeater.
(test-ox-icalendar/todo-repeating-deadline-warndays): Test using
warning days as DTSTART of repeating deadline.
(test-ox-icalendar/todo-repeater-until): Test using DEADLINE as RRULE
UNTIL.
(test-ox-icalendar/todo-repeater-until-utc): Test RRULE UNTIL is in
UTC format when DTSTART is not in local time format.
(test-ox-icalendar/warn-unsupported-repeater): Unit test to warn for
unsupported repeater types.
* lisp/org-lint.el (org-lint-mismatched-planning-repeaters): Add lint
for mismatched SCHEDULED and DEADLINE repeaters.
* testing/lisp/test-org-lint.el
(test-org-lint/mismatched-planning-repeaters): Add test for linting of
mismatched SCHEDULED and DEADLINE repeaters.
* doc/org-manual.org (iCalendar Export): Add link to new variable
`org-icalendar-todo-unscheduled-start'.
Fixes issue where the ox-icalendar export uses an inconsistent mix of
dos and unix style line endings.
* lisp/ox-icalendar.el (org-icalendar-fold-string): No longer converts
to CRLF, instead delegating that to `org-icalendar--post-process-file'.
(org-icalendar--post-process-file): New function to handle exported
file post-processing. Converts EOL to CRLF, and then runs
`org-icalendar-after-save-hook'.
(org-icalendar-export-to-ics, org-icalendar-export-current-agenda,
org-icalendar--combine-files): Call `org-icalendar--post-process-file'
instead of running `org-icalendar-after-save-hook' directly.
* testing/lisp/test-ox-icalendar.el: New file for unit tests of
ox-icalendar. Add an initial test for CRLF line endings.
See also:
https://list.orgmode.org/87o7oetneo.fsf@localhost/T/#m3e3eb80f9fc51ba75854b33ebfe9ecdefa2ded24https://list.orgmode.org/orgmode/87ilgljv6i.fsf@localhost/
Jack Kamm