Re: make project--find-in-file generic, add interactive filename to project-find-file

[Dmitry Gutov]

On 01/29/2016 12:11 AM, Stefan Monnier wrote:
> > But in the current use case, the "filename at point" will almost always
> > _not_ be in the completion table. And it may even have several expansions,
> > not just one. Because it's only a part of the file name: maybe it's the base
> > name, or maybe it doesn't even have an extension.
>
> So, we want to check it only if it's actually returned.  Sounds right.

I don't follow.

Do you mean returned by completing-read? I'd prefer not to allow the 
user to input it as-is (we call completing-read with REQUIRE-MATCH t).

Or, to put it differently, I'd like to be able to M-x project-find-file, 
then press RET, and:

- If there's just one match for the filename-at-point, see it opened 
(the completion must be expanded first).

- Otherwise, be forced to edit the input, to narrow down the matches, or 
to type something different, if the project has no matching files.

If I pass filename-at-point as DEFAULT, I don't get either of these items.