bug#66317: Project mode-line

[Eshel Yaron via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Hi,

Juri Linkov <juri@linkov.net> writes:

> Here is the implementation of the mode-line project indicator prepended
> before the vc indicator with the project menu discussed in bug#63469:
>
> diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
> index 2e6ae89a443..8798feb2c56 100644
> --- a/lisp/progmodes/project.el
> +++ b/lisp/progmodes/project.el
> @@ -2010,5 +2102,20 @@ project-uniquify-dirname-transform
>            (file-relative-name dirname root))))
>      dirname))
>
> +;;; Project mode-line
> +
> +(let ((form '(:eval (when-let (project (project-current))
> +                      (concat " "
> +                              (propertize
> +                               (project-name project)
> +                               'mouse-face 'mode-line-highlight
> +                               'local-map
> +                               (make-mode-line-mouse-map
> +                                'down-mouse-1
> +                             `(menu-item "Project"
> +                                            ,menu-bar-project-menu))))))))
> +  (when-let (pos (seq-position mode-line-format '(vc-mode vc-mode)))
> +    (cl-pushnew form (nthcdr pos mode-line-format))))
> +
>  (provide 'project)
>  ;;; project.el ends here

This looks nice (I actually have something similar in my
`mode-line-format` already), but I think that modifying
`mode-line-format` when project.el is loaded is a bit problematic.
Perhaps a better alternative would be to define a variable that holds
this mode-line construct, along with an autoloaded function that people
can call from their init files to actually add this construct to
`mode-line-format`.  WDYT?


Best,

Eshel