git-like parsing of date strings

git-like parsing of date strings

[John Yates]

In elisp, how can I parse dates specified using git's approxidate syntax?

Re: git-like parsing of date strings

[Eli Zaretskii]

> From: John Yates <john@yates-sheets.org>
> Date: Mon, 27 Mar 2023 10:00:33 -0400
> 
> In elisp, how can I parse dates specified using git's approxidate syntax?

Try the functions in lisp/calendar/parse-time.el.

Re: git-like parsing of date strings

[John Yates]

On Mon, Mar 27, 2023 at 10:06 AM Eli Zaretskii <eliz@gnu.org> wrote:
>
> Try the functions in lisp/calendar/parse-time.el.

parse-time appears to handle only absolute dates.

I need support for relative dates (e.g. yesterday, 3 days ago, etc).

Maybe something like: https://github.com/thatguystone/approxidate

Re: git-like parsing of date strings

[Eli Zaretskii]

> From: John Yates <john@yates-sheets.org>
> Date: Mon, 27 Mar 2023 11:43:40 -0400
> Cc: help-gnu-emacs@gnu.org
> 
> On Mon, Mar 27, 2023 at 10:06 AM Eli Zaretskii <eliz@gnu.org> wrote:
> >
> > Try the functions in lisp/calendar/parse-time.el.
> 
> parse-time appears to handle only absolute dates.
> 
> I need support for relative dates (e.g. yesterday, 3 days ago, etc).

Your OP never said anything about relative dates.

I don't think something like that exists in Emacs.

Re: git-like parsing of date strings

[Tim Landscheidt]

Eli Zaretskii <eliz@gnu.org> wrote:

>> > Try the functions in lisp/calendar/parse-time.el.

>> parse-time appears to handle only absolute dates.

>> I need support for relative dates (e.g. yesterday, 3 days ago, etc).

> Your OP never said anything about relative dates.

> I don't think something like that exists in Emacs.

Relative dates can be parsed by org-read-date, but the syn-
tax is not very Git-like.  (For the latter, one can always
resort to `git rev-parse --since='3 weeks 2 days ago'` and
then parse the output.)

Tim

Re: git-like parsing of date strings

[John Yates]

On Mon, Mar 27, 2023 at 7:50 PM Tim Landscheidt <tim@tim-landscheidt.de> wrote:
>
> Relative dates can be parsed by org-read-date, but the syn-
> tax is not very Git-like.

Do you know where I would find that parsing code?

Re: git-like parsing of date strings

[Tim Landscheidt]

John Yates <john@yates-sheets.org> wrote:

>> Relative dates can be parsed by org-read-date, but the syn-
>> tax is not very Git-like.

> Do you know where I would find that parsing code?

Well, it is probably somewhere in org-read-date-analyze, but
I would just use org-read-date:

| ELISP> (format-time-string "%Y-%m-%d" (org-read-date nil t "-3w"))
| "2023-03-07"
| ELISP> (format-time-string "%Y-%m-%d" (org-read-date nil t "+2d"))
| "2023-03-30"
| ELISP>

Tim