bug#58447: [PATCH] In project-find-file, add absolute file name to history

[Augusto Stoffel <arstoffel@gmail.com>]

On Thu, 15 Dec 2022 at 09:24, Juri Linkov wrote:

>> The patches could be combined, but v1 seems to be too invasive for
>> emacs-29, yet v2 could be just small enough to be considered "bugfix-only".
>>
>> So, what does everyone think about the latter?
>>
>> If people agree that the v2 patch is an improvement, we can check it in and
>> leave project-local histories until later.
>
> Does the second patch allow such workflows as re-visiting
> the same relative filenames in another directory?

I don't think this should be the default behavior at all.  To me it
seems much more likely that a user _does not_ want to see files from
other projects when doing `C-x p f M-p'.

Your workflow seems more of a job the "find related file" feature that
has been discussed recently in the list.

> IMHO, the safest fix for emacs-29 would be to add relative filenames
> to the separate history.  If someone might want to use
> 'file-name-history', then a new variable could be added like
> 'query-replace-from-history-variable'.  Then this variable
> could be customized to 'file-name-history', or nil.

Then let's do the opposite.  We define 'project-file-history-variable'
and let it be nil by default.  In this case, we get the behavior of
Dmitry's patch v2.  If it's not nil, then we assume it's to be used
as-is, with no filtering or removal of project root prefix.  The user
can set it whatever way they please and take care it makes sense.