bug#63648: 29.0.90; project.el: with switch-use-entire-map, switch-project errors on non-project commands

[Dmitry Gutov]

Hi Juri,

On 22/09/2023 18:52, Juri Linkov wrote:
> > > Probably. Would you like to propose one? So that I have something to
> > > compare to, and have something specific to put to the vote as well.
> >
> > Ok, something like this:
>
> Here is a more tested patch.  It supports these cases:
>
> (setq project-switch-use-entire-map t)
>
> C-x p p C-b - should not include current buffer in the list of another project 
> (bug#58784)
> C-x p p f M-n - should fetch the right default file name (bug#58784, bug#63829)
> C-u C-x p p f emoji TAB - should include ignored emoji-labels.el (bug#63648)
> C-x p p C-x d - should visit another project's root (bug#63648)
>
> The same with frames:
>
> C-x 5 p p C-b
> C-x 5 p p f M-n
> C-u C-x 5 p p f emoji TAB - should not show completions in another frame 
> (bug#65558)
> C-x 5 p p C-x d

Thank you. Especially for the list.

But I think we still haven't reached a decision whether the "loop until 
correct key is pressed" behavior is useful.

I tried to think how to fit the above requirements into the existing 
model, and it seems to require a new command, and an additional key 
being pressed sometimes, for explicitness.

The attached patch also includes your fix for bug#65558, which seems 
orthogonal to our dilemma, and could probably be installed separately. 
It could be dry-ed up a little, though.

Anyway, with the attached counter-proposal, the list looks like this:

C-x p p C-b - works when project-switch-use-entire-map=t
C-x p p f M-n - always works
C-u C-x p p f - same
C-x p p C-x d - the key sequence is 'C-x p p o C-x d'

With frames:

C-x 5 p p C-b - works when project-switch-use-entire-map=t
C-x 5 p p f M-n - always works
C-u C-x 5 p p f emoji TAB - same (thanks to your fix, included)
C-x 5 p p C-x d - the key sequence is 'C-x 5 C-x p p o C-x d'

The user could add project-list-buffers (or project-switch-to-buffer) to 
project-switch-commands, though, and then project-switch-use-entire-map 
won't be needed. Either way's fine.

To sum up, that does require pressing an extra key to use commands 
outside of project-prefix-map, but OTOH that key is shown right in the 
commands menu. And one doesn't have to (setq 
project-switch-use-entire-map t) to use it, though that doesn't hurt either.

And the meaning of project-switch-use-entire-map remains as it currently 
is: expand the set of keys to the whole project-prefix-map, but not to 
all local and global ones.

WDYT?

project-other-command.diff
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