bug#41890: 28.0.50; [PATCH]: Add bindings for project.el

[Dmitry Gutov]

On 13.07.2020 02:48, Juri Linkov wrote:
> But later Philip sent another patch in
> https://debbugs.gnu.org/41890#100
> that doesn't use set-transient-map
> for the reasons that I don't understand.
> Providing the explanation Philip said:
>
>    It turned out that the transient map approach didn't work, as it
>    ignored the value in default-directory, thus running all commands in
>    whatever the current project was.
>
> Maybe the same function can set default-directory
> to solve the problem to be able to use set-transient-map?

I think I can explain that: you can set the transient map to handle the 
next command, but you can let-bind a variable to only have the binding 
have the effect during the next command.

And you can't exactly setq that value either, or else it would overwrite 
the buffer-local default-directory value in the current buffer.