bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Manuel Uberti]

Hi,

when I use project-find-file it always picks up the thing at point even when it 
is something I am pretty sure that does not correspond to a filename, which, in 
my case, is all the times.

I see that in project.el, project-find-file uses project-find-file-in:

;;;###autoload
(defun project-find-file ()
   "Visit a file (with completion) in the current project.

The completion default is the filename at point, determined by
`thing-at-point' (whether such file exists or not)."
   (interactive)
   (let* ((pr (project-current t))
          (dirs (list (project-root pr))))
     (project-find-file-in (thing-at-point 'filename) dirs pr)))

Would it be possible to make it customizable with regards to that
(thing-at-point 'filename)?

At the moment I am using this in my init.el, which I have bound to f in 
project-prefix-map:

(defun mu-project-find-file ()
   "Visit a file (with completion) in the current project."
   (interactive)
   (let* ((pr (project-current t))
          (dirs (list (project-root pr))))
     (project-find-file-in nil dirs pr)))

So what I would like is a defcustom that makes me choose whether to pass nil or 
(thing-at-point ...) to project-find-file-in.

I know that this is not a real bug because I can still type whatever I want 
after calling project-find-file, so I totally understand if this is not 
something worth new code in project.el. It's just that I don't see the point for 
project-find-file to suggest me as defaults things like "defun" or "interactive".


Thank you.



In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.18, cairo 
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-- 
Manuel Uberti
www.manueluberti.eu

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Lars Ingebrigtsen]

Manuel Uberti <manuel.uberti@inventati.org> writes:

> when I use project-find-file it always picks up the thing at point
> even when it is something I am pretty sure that does not correspond to
> a filename, which, in my case, is all the times.
>
> I see that in project.el, project-find-file uses project-find-file-in:
>
> ;;;###autoload
> (defun project-find-file ()
>   "Visit a file (with completion) in the current project.
>
> The completion default is the filename at point, determined by
> `thing-at-point' (whether such file exists or not)."
>   (interactive)
>   (let* ((pr (project-current t))
>          (dirs (list (project-root pr))))
>     (project-find-file-in (thing-at-point 'filename) dirs pr)))

This reminded me that I've been meaning to add a thing-at-point target
that is like `filename', but returns nil if the file named doesn't
exist, so I've now done this in Emacs 28.

Perhaps project.el should use it here?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Perhaps project.el should use it here?

In Emacs 28 (and up) only, of course.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Manuel Uberti]

On 04/08/21 10:37, Lars Ingebrigtsen wrote:
> Lars Ingebrigtsen <larsi@gnus.org> writes:
> 
>> Perhaps project.el should use it here?
> 
> In Emacs 28 (and up) only, of course.
> 

Thank you Lars!

I don't know if Dmitry got these emails, but since he worked quite a lot on 
project.el I Cc'd him.

-- 
Manuel Uberti
www.manueluberti.eu

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Dmitry Gutov]

Hi Lars,

On 04.08.2021 11:37, Lars Ingebrigtsen wrote:
> This reminded me that I've been meaning to add a thing-at-point target
> that is like `filename', but returns nil if the file named doesn't
> exist, so I've now done this in Emacs 28.
> 
> Perhaps project.el should use it here?

I don't know if it will be the best choice here.

First of all, we already have the hook file-name-at-point-functions, 
which is consulted by read-file-name--defaults. So one can already e.g. 
move point to some existing file name, press C-x C-f M-n and with the 
power of the ffap package have the file name inserted.

But when we're completing project-wide, there will also be references 
that are not relative to the current directory (and instead relate to 
some project-configured path). Like

#include "stuff/thingy.h"

or

require 'actor/abc'

...where the string is both not relative to the current dir and is 
missing the extension.

ffap actually includes support for this, like having

(require 'cl-lib)

be recognized as '.../lisp/emacs-lisp/cl-lib.el', but it only works for 
a limited set of languages, and OOTB only for Elisp (for all others you 
need to configure variables like ffap-c++-path).

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Dmitry Gutov]

Hi Manuel,

Good timing.

On 04.08.2021 09:16, Manuel Uberti wrote:
> when I use project-find-file it always picks up the thing at point even 
> when it is something I am pretty sure that does not correspond to a 
> filename, which, in my case, is all the times.

I have just pushed a patch previously discussed in bug#49204 which 
changes this behavior as well (commit fa89537).

Let me know how you like it. It should make the "thing at point" thing 
less in-your-face, but one could still reach for it when needed.

 > I know that this is not a real bug because I can still type whatever 
I want after calling project-find-file, so I totally understand if this 
is not something worth new code in project.el. It's just that I don't 
see the point for project-find-file to suggest me as defaults things 
like "defun" or "interactive".

Seeing "(default defun): " in the prompt must have been annoying. Though 
I think it was the most problematic when the string at point is long.

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Manuel Uberti]

On 06/08/21 02:36, Dmitry Gutov wrote:
> I have just pushed a patch previously discussed in bug#49204 which changes this 
> behavior as well (commit fa89537).
> 
> Let me know how you like it. It should make the "thing at point" thing less 
> in-your-face, but one could still reach for it when needed.

Hi Dmitry,

thank you for the quick fix. The only thing that may look unfamiliar is the new 
prompt.

Let's see if I can give you an example:

- C-x p p, I pick '.emacs.d'
- f
- the prompt shows 'Find file in /home/manuel/.emacs.d'
- now I type 'valu' because I want to visit 
'/home/manuel/.emacs.d/etc/transient/values.el'
- the prompt shows 'Find file in /home/manuel/.emacs.d/valu'

At first I thought hitting RET would take me to '/home/manuel/.emacs.d/valu' 
instead of '/home/manuel/.emacs.d/etc/transient/values.el'. It doesn't, of 
course, but maybe having a prompt like 'Find file in /home/manuel/.emacs.d: 
valu' makes it clearer?

-- 
Manuel Uberti
www.manueluberti.eu

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Dmitry Gutov]

On 06.08.2021 08:27, Manuel Uberti wrote:
> At first I thought hitting RET would take me to 
> '/home/manuel/.emacs.d/valu' instead of 
> '/home/manuel/.emacs.d/etc/transient/values.el'. It doesn't, of course, 
> but maybe having a prompt like 'Find file in /home/manuel/.emacs.d: 
> valu' makes it clearer?

Thanks for the catch, this got lost with the change.

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Manuel Uberti]

On 06/08/21 10:45, Dmitry Gutov wrote:
> Thanks for the catch, this got lost with the change.

It's perfect now, thanks a lot for this.

Unless Lars has something more to add, I think this can be considered solved now.

-- 
Manuel Uberti
www.manueluberti.eu

bug#49865: 28.0.50; Customize project-find-file without thing-at-pont

[Lars Ingebrigtsen]

Manuel Uberti <manuel.uberti@inventati.org> writes:

> Unless Lars has something more to add, I think this can be considered
> solved now.

Looks good to me, too, so I'm closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no