On Thu, Dec 14 2023, Rudolf Adamkovič wrote:

> Fellow hackers,
>
> So, I have always wondered why Notmuch uses the strangest buffer titles
> ever, and yesterday I decided to take a look under the hood...  I found
> that the code in 'notmuch-search-buffer-title' defines and uses a pair
> of variables, named 'longest' and 'longest-length', but never sets the
> latter, which causes the strange buffer titles I observe.  Please see
> the attached patch with a fix.
>
> P.S. I could not make the test suite work, not in the time I had for the
> fix, so ... see the test in the commit message. :)
>
> Rudy
> From c0cb08a843b5c904642da639f94c4a5e43d1ef14 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Rudolf=20Adamkovi=C4=8D?= <salu...@me.com>
> Date: Wed, 13 Dec 2023 22:39:02 +0100
> Subject: [PATCH] emacs: Fix saved-search buffer titles
>
> REPRODUCTION STEPS:
>
>   (let ((notmuch-saved-searches
>          (list (list :name "Emacs List"
>                      :query "query:lists-emacs")
>                (list :name "All Lists"
>                      :query "query:lists"))))
>     (notmuch-search-buffer-title "query:lists-emacs" ))
>
> ACTUAL:
>
>   "*notmuch-saved-search-[ All Lists ]-emacs*"
>
> EXPECTED:
>
>    "*notmuch-saved-search-Emacs List*"
> ---
>  emacs/notmuch.el | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)
>
> diff --git a/emacs/notmuch.el b/emacs/notmuch.el
> index 6eef4af1..1ac145f0 100644
> --- a/emacs/notmuch.el
> +++ b/emacs/notmuch.el
> @@ -964,17 +964,20 @@ unthreaded) and whether it's SAVED (t or nil)."
>  (defun notmuch-search-buffer-title (query &optional type)
>    "Returns the title for a buffer with notmuch search results."
>    (let* ((saved-search
> -       (let (longest
> -             (longest-length 0))
> -         (cl-loop for tuple in notmuch-saved-searches
> -                  if (let ((quoted-query
> -                            (regexp-quote
> -                             (notmuch-saved-search-get tuple :query))))
> -                       (and (string-match (concat "^" quoted-query) query)
> -                            (> (length (match-string 0 query))
> -                               longest-length)))
> -                  do (setq longest tuple))
> -         longest))
> +       (cl-loop with match
> +                with match-length = 0
> +                for candidate in notmuch-saved-searches
> +                for length = (let* ((query* (notmuch-saved-search-get
> +                                             candidate
> +                                             :query))
> +                                    (regexp (concat "^"
> +                                                    (regexp-quote query*))))
> +                               (and (string-match regexp query)
> +                                    (length (match-string 0 query))))
> +                if (and length (> length match-length))
> +                do (setq match candidate
> +                         match-length length)
> +                finally return match))

The code looks good to me (and I could understand everything there after
couple of views into Info node ‘(cl)Loop Facility’.)


Tomi

>        (saved-search-name (notmuch-saved-search-get saved-search :name))
>        (saved-search-type (notmuch-saved-search-get saved-search 
> :search-type))
>        (saved-search-query (notmuch-saved-search-get saved-search :query)))
> -- 
> 2.39.3 (Apple Git-145)
>
> -- 
> "The introduction of suitable abstractions is our only mental aid to
> organize and master complexity."
> --- Edsger Wybe Dijkstra, 1930-2002
>
> Rudolf Adamkovič <salu...@me.com> [he/him]
> Studenohorská 25
> 84103 Bratislava
> Slovakia
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