bug#66317: Project mode-line

[Juri Linkov]

> On 03/10/2023 20:11, Juri Linkov wrote:
>>> 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?
>> In bug#63469 I implemented 'project-mode' with the buffer-local
>> variable 'project-name'.  But due to objections I rewrote this
>> to simpler and direct implementation.  I could revive the previous
>> patch now.
>
> Could you make it a user option 'project-show-in-mode-line' or similar?
>
> Minor mode 'project-mode-line-mode' would also be okay.

But there is no such mode for vc-mode (vc-mode is not a proper mode).