bug#44210: 28.0.50; project.el failed to work after customizing find-program to fd

[Dmitry Gutov <dgutov@yandex.ru>]

Hi!

On 25.10.2020 13:26, Zhiwei Chen wrote:
> The arguments of `find-program' in function
> `project--files-in-directory' is hard coded, which disallows customizing
> `find-program' in some means.

The arguments are not hardcoded (they are constructed dynamically), but 
the format is (one expected by 'find').

'fd' uses a different arguments format, both for the "globs to search 
for" and the list of ignores. I wish we had a better mechanism in 
grep.el for a more flexible user ability to choose the tool to list 
files in a dir (and a search tool, and so on).

> `counsel-file-jump` uses `find-program' and provides
> `counsel-file-jump-args' which I thought is better.

A variable with a flat list of args won't do here, because we actually 
have to turn two other lists (FILES and IGNORES) into appropriate arguments.

What you could do, is do full :override advice on which would construct 
a proper command line for 'fd' based on these args, then call it and 
pipe through 'project--remote-file-names' (like 
'project--files-in-directory' currently does). Then benchmark them and 
post the results here.

If the result offers a meaningfully better performance, while honoring 
all ignores, we'll see what we can do to accommodate 'fd'.