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Re: master 1e3b0f2: Improve doc strings of project.el

From: Dmitry Gutov
Subject: Re: master 1e3b0f2: Improve doc strings of project.el
Date: Sun, 21 Jun 2020 00:18:14 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0

On 20.06.2020 15:37, Eli Zaretskii wrote:
Cc: Eli Zaretskii <eliz@gnu.org>, Theodor Thornhill <theothornhill@pm.me>,
  philip@warpmail.net, emacs-devel@gnu.org
From: Dmitry Gutov <dgutov@yandex.ru>
Date: Sat, 20 Jun 2020 14:57:07 +0300

Would it make sense for these special modes to have a buffer-local
variable pointing to the buffer where the command was invoked?
project.el could then consult that variable first, then fallback to

Perhaps. I don't know if that would be enough for Eli's purposes, however.

It will solve some of them, to be sure.

Solve them how? Do you always invoke that search command from a buffer belonging to the original project? 75% of the time? 30%?

After all, in the Grep example, it could have been invoked from one of
the buffers belonging to the current project, or just as well from an
"outside" buffer (because, for example, that made it easier to select
the intended directory).

So you are saying that it's better to have no way of supporting that
use case than have some, even restricted, way?

No. I even suggested a few ways how this can be user-extensible.

And I'm saying we need a coherent design that's in line with what is already there. Or extends the behavior in a predictable way.

Going back to Kevin's suggestion, I'm fairly sure it will also generate both false positives and false negatives, going simply by my own usage habits: the originating buffer of where I'm calling a command doesn't necessarily correspond to which project I'm thinking of right now.

So I'm not sure if we can do this for the default behavior. Hence we'd need to use either one of the existing customization point, or add a new one.

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