GNU bug report logs - #66317
Project mode-line

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From: Dmitry Gutov <dmitry <at> gutov.dev>
To: Spencer Baugh <sbaugh <at> janestreet.com>, Juri Linkov <juri <at> linkov.net>
Cc: 66317 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, Eshel Yaron <me <at> eshelyaron.com>
Subject: bug#66317: Project mode-line
Date: Thu, 5 Oct 2023 23:16:04 +0300

On 05/10/2023 23:03, Spencer Baugh wrote:
> then while I'm at the find-file prompt, all modelines for all buffers
> show emacs-29 as the current project, no matter what they showed before
> (even if they didn't show anything before)
> 
> Haven't thought at all about how to fix this, but we might want to think
> about it in the context of bug#63648 where we've been rethinking the
> implementation of project-switch-project.

This can be fixed with e.g. patch below.

Thank for the reminder about that report, BTW.

diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
index 2e6ae89a443..867e4754622 100644
--- a/lisp/progmodes/project.el
+++ b/lisp/progmodes/project.el
@@ -1990,8 +1990,11 @@ project-switch-project
   (let ((command (if (symbolp project-switch-commands)
                      project-switch-commands
                    (project--switch-project-command))))
-    (let ((project-current-directory-override dir))
-      (call-interactively command))))
+    (unwind-protect
+        (progn
+          (setq-local project-current-directory-override dir)
+          (call-interactively command))
+      (kill-local-variable 'project-current-directory-override))))

 ;;;###autoload
 (defun project-uniquify-dirname-transform (dirname)

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