Re: project-compilation-buffer-name-function and recompile

[Dmitry Gutov]

Hi!

On 17/01/2024 22:54, Jörg Bornemann wrote:
> Hi,
>
> 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---

This works.

Alternatively, you could add around-advice to recompile which would 
temporarily bind compilation-buffer-file-name-function.

> 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?

The command could look like this:

  (defun project-recompile (&optional edit-command)
    (interactive "P")
    (let ((compilation-buffer-name-function 
project-compilation-buffer-name-function ))
      (recompile edit-command)))

It probably doesn't deserve a default key binding in project-prefix-map, 
but you could the same way to invoke it as you did with 'recompile'.

TBF, whenever I need to do a recompile-y action, I usually switch to the 
corresponding compilation buffer and press 'g'. That usually has the 
same effect and doesn't require remembering an extra command.