Re: master da4e5f6: Simplify use of timestamps

[Glenn Morris <rgm@gnu.org>]

Paul Eggert wrote:

> branch: master
> commit da4e5f668582e1f047b6bd5259a1a4f92b5461b6
[...]
> --- a/lisp/calendar/icalendar.el
> +++ b/lisp/calendar/icalendar.el
> @@ -1016,9 +1016,7 @@ current iCalendar object, as a string.  Increase
>        (setq icalendar--uid-count (1+ icalendar--uid-count))
>        (setq uid (replace-regexp-in-string
>                   "%t"
> -                 (format "%d%d%d" (car (current-time))
> -                         (cadr (current-time))
> -                         (car (cddr (current-time))))
> +                 (format-time-string "%s%N")
>                   uid t t))

This causes test icalendar--create-uid to fail.
(BTW, make -j8 check takes 22 seconds here, so not a big burden to run
after making a change.)

> --- a/lisp/gnus/nnmaildir.el
> +++ b/lisp/gnus/nnmaildir.el
> @@ -764,7 +764,7 @@ This variable is set by `nnmaildir-request-article'.")
>  
>  (defun nnmaildir--scan (gname scan-msgs groups _method srv-dir srv-ls)
>    (catch 'return
> -    (let ((36h-ago (- (car (current-time)) 2))
> +    (let ((36h-ago (- (float-time) 129600))
>  	  absdir nndir tdir ndir cdir nattr cattr isnew pgname read-only ls
>  	  files num dir flist group x)
>        (setq absdir (nnmaildir--srvgrp-dir srv-dir gname)
> @@ -801,7 +801,7 @@ This variable is set by `nnmaildir-request-article'.")
>  	  (throw 'return nil))
>  	(dolist (file (funcall ls tdir 'full "\\`[^.]" 'nosort))
>  	  (setq x (file-attributes file))
> -	  (if (or (> (cadr x) 1) (< (car (nth 4 x)) 36h-ago))
> +	  (if (or (> (cadr x) 1) (time-less-p (nth 4 x) 36h-ago))
>  	      (delete-file file))))
>        (or scan-msgs
>  	  isnew
> @@ -1463,9 +1463,7 @@ This variable is set by `nnmaildir-request-article'.")
>        (unless (string-equal nnmaildir--delivery-time file)
>  	(setq nnmaildir--delivery-time file
>  	      nnmaildir--delivery-count 0))
> -      (when (and (consp (cdr time))
> -		 (consp (cddr time)))
> -	(setq file (concat file "M" (number-to-string (caddr time)))))
> +      (setq file (concat file (format-time-string "M%6N" time)))
>        (setq file (concat file nnmaildir--delivery-pid)
>  	    file (concat file "Q" (number-to-string nnmaildir--delivery-count))
>  	    file (concat file "." (nnmaildir--system-name))

I haven't looked at this in any detail, so this comment could be
rubbish, but if this causes a change in the on-disk file names Gnus uses
for maildir, that could be bad, no? (Eg running a Gnus-with-new-maildir
on a pre-existing maildir store might not find the same files as
Gnus-with-old-maildir.)