GNU bug report logs - #68570
29.1; recompile might not re-use project-compile's buffer

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From: Jörg Bornemann <foss <at> jbornemann.de>
To: 68570 <at> debbugs.gnu.org
Subject: bug#68570: 29.1; recompile might not re-use project-compile's buffer
Date: Thu, 18 Jan 2024 17:17:07 +0100

One can use project-compile to build a project and then call recompile
to repeat the compilation.  This reuses the buffer named
"*compilation*".

If I set project-compilation-buffer-name-function to
#'project-prefixed-buffer-name, this creates a compilation buffer
"*myproject-compilation*" when executing project-compile.  Now,
recompile won't re-use "*myproject-compilation*" but create a new
buffer "*compilation*".

To reproduce this behavior, it is enough to start Emacs like this:
$ emacs -Q --eval "(setq project-compilation-buffer-name-function 
#'project-prefixed-buffer-name)"

It would be nice if recompile could re-use project-compile's buffer 
name.  I have fixed this locally by setting 
compilation-buffer-name-function like this:

---snip---
  (defun my-compilation-buffer-name (name-of-mode)
    (if (project-current)
        (apply project-compilation-buffer-name-function (list 
name-of-mode))
      (compilation--default-buffer-name name-of-mode)))

  (setq compilation-buffer-name-function #'my-compilation-buffer-name)
---snap---

Although I'm thinking by now that it might be more consistent to have a 
separate project-recompile command in addition to
recompile.

What do you think?  On one hand is the above fix quite convenient but on 
the other, compilation-buffer-name-function probably should not have 
project.el-specific knowledge.

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