Re: [BUG] org-compile-prefix-format regexp change breaks eval forms [9.4.6 (9.4.6-gf72a65)]

[Ihor Radchenko <yantar92@gmail.com>]

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Radon Rosborough <radon.neon@gmail.com> writes:

> If you insert the format string into a temporary buffer, then the `read'
> function will read up to the closing parenthesis and update point
> accordingly. That would be a foolproof way to handle all possible Lisp
> forms: use a regexp to find the start, and then use `read' to find the end.
> Then proceed with regexp matching, and repeat like that.

Thanks for the suggestion! The patch is attached.

Best,
Ihor


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From ffbf7fe29913e33e3f20544be49b6cc2c0ef6409 Mon Sep 17 00:00:00 2001
Message-Id: <ffbf7fe29913e33e3f20544be49b6cc2c0ef6409.1622361756.git.yantar92@gmail.com>
From: Ihor Radchenko <yantar92@gmail.com>
Date: Sun, 30 May 2021 16:00:07 +0800
Subject: [PATCH] Allow sexps with nested parenthesis in
 org-agenda-prefix-format

* lisp/org-agenda.el (org-compile-prefix-format): Use `read' instead
of pure regexp matching to determine bounds of %(sexp) expressions in
`org-agenda-prefix-format'.

Fixes https://orgmode.org/list/87fsy8yi1e.fsf@localhost/
---
 lisp/org-agenda.el | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lisp/org-agenda.el b/lisp/org-agenda.el
index f49a24f88..fcfcd872e 100644
--- a/lisp/org-agenda.el
+++ b/lisp/org-agenda.el
@@ -6942,7 +6942,7 @@ (defun org-compile-prefix-format (key)
 		  (and (string-match "\\.[0-9]+" x)
 		       (string-to-number (substring (match-string 0 x) 1)))))))
       (if (eq var 'eval)
-	  (setq varform `(format ,f (org-eval ,(read (match-string 4 s)))))
+	  (setq varform `(format ,f (org-eval ,(read (substring s (match-beginning 4))))))
 	(if opt
 	    (setq varform
 		  `(if (member ,var '("" nil))
@@ -6951,7 +6951,12 @@ (defun org-compile-prefix-format (key)
 	  (setq varform
 		`(format ,f (if (member ,var '("" nil)) ""
 			      (concat ,var ,c (get-text-property 0 'extra-space ,var)))))))
-      (setq s (replace-match "%s" t nil s))
+      (if (eq var 'eval)
+          (setf (substring s (match-beginning 0)
+                           (+ (match-beginning 4)
+                              (length (format "%S" (read (substring s (match-beginning 4)))))))
+                "%s")
+        (setq s (replace-match "%s" t nil s)))
       (push varform vars))
     (setq vars (nreverse vars))
     (with-current-buffer (or org-agenda-buffer (current-buffer))
-- 
2.26.3