From: Ihor Radchenko <yantar92@gmail.com>
To: Max Nikulin <manikulin@gmail.com>
Cc: Paul Eggert <eggert@cs.ucla.edu>, org-mode-email <emacs-orgmode@gnu.org>
Subject: Re: [DRAFT][PATCH] org-encode-time compatibility and convenience helper
Date: Sat, 23 Apr 2022 16:25:00 +0800 [thread overview]
Message-ID: <87mtgcmckj.fsf@localhost> (raw)
In-Reply-To: <7f4ea652-7d22-fb61-f873-5e92f078c9e6@gmail.com>
Max Nikulin <manikulin@gmail.com> writes:
> I tried to create a compatibility helper that will use currently
> recommended way to call `encode-time' with single list argument for
> Emacs-27 and newer, but use the only available call style as separated
> arguments for older Emacs versions.
Thanks for this work!
> From my point of view
> - it should work at the compile or load time to minimize runtime
> performance impact,
> - since both ways to call `encode-time' are necessary (in a half of
> cases a list returned by `decode-time' is available, in other cases
> timestamps are assembled from scratch, none is preferred), it should be
> convenient in both cases,
> - it should allow Org to work even if support of multiple `encode-time'
> arguments will be removed from Emacs.
Agree.
> My patch requires more changes since the macro is just defined but not
> actually used. It does not fix the problem with "no DST" flag returned
> by some function in Org. I can prepare next patches, but I think it
> should be decided at first which approach should be accepted by Org Mode:
> - org-encode-time accepting both list or separate arguments
> - mix of `encode-time' with multiple arguments and org-encode-time-1 for
> lists.
This whole timezone staff is complex. I got lost in the emacs devel
discussion half-way through. From point of view of API, I would prefer a
single function with docstring explaining the necessary caveats.
> + (if (cdr time)
> + `(encode-time ,@time)
> + `(apply #'encode-time ,(car time))))
Do I miss something or can you instead just do `(encode-time ,@time)
without if?
> + (should (string-equal
> + "2022-03-24 23:30:01"
> + (format-time-string
> + "%F %T"
> + (org-encode-time '(01 30 23 24 03 2022 nil -1 nil)))))
> ...
These tests will be executed using system value of TZ. I am not sure if
tests are not going to break, say, in southern hemisphere or at some
other bizzare values of TZ.
> + ;; daylight saving time
> + (let ((tz (getenv "TZ")))
> + (unwind-protect
> + (progn
> + (setenv "TZ" "Europe/Madrid")
> + (should (string-equal
> + "2022-03-31 23:30:06"
> + (format-time-string
> + "%F %T"
> + (org-encode-time 06 30 23 31 03 2022)))))
> + (setenv "TZ" tz))))
Best,
Ihor
next prev parent reply other threads:[~2022-04-23 8:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-11 15:22 Max Nikulin
2022-04-11 17:43 ` Paul Eggert
2022-04-23 8:25 ` Ihor Radchenko [this message]
2022-04-23 19:37 ` Paul Eggert
2022-04-24 3:35 ` Ihor Radchenko
2022-04-24 11:34 ` [DRAFT][PATCH v2] " Max Nikulin
2022-04-26 9:07 ` Ihor Radchenko
2022-05-03 12:14 ` [PATCH v3] " Max Nikulin
2022-05-04 9:56 ` Ihor Radchenko
2022-05-04 16:49 ` Max Nikulin
2022-05-05 15:22 ` [PATCH v4] " Max Nikulin
2022-05-07 4:46 ` Ihor Radchenko
2022-05-10 14:31 ` Max Nikulin
2022-05-11 13:20 ` Ihor Radchenko
2022-05-13 15:14 ` Max Nikulin
2022-05-14 6:06 ` Ihor Radchenko
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