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bug#17949: 24.3; .dir-locals.el needs a way to construct paths relative
From: |
Lars Ingebrigtsen |
Subject: |
bug#17949: 24.3; .dir-locals.el needs a way to construct paths relative to its own location |
Date: |
Sat, 29 May 2021 07:09:09 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Stefan Monnier <monnier@iro.umontreal.ca> writes:
>> Sometimes, I want to use .dir-locals.el to set a variable to refer to a
>> specific file within the tree in question, independantly of how deep in
>> that tree the file in question actually is.
>
> You could use something like:
>
> (eval (setq-local my-var
> (expand-file-name "etc/foo"
> (locate-dominating-file
> default-directory ".dir-locals.el"))))
>
>> Perhaps using a form something like:
>> ,(expand-file-name "etc/foo.bar" dir-locals-directory)
>
> Problem is security: the .dir-local.el file might not be under your
> control, so we don't want to run arbitrary code. The "eval" option
> above of course suffers from the same problem, but at least it's the
> official existing way to run arbitrary code, which means it doesn't run
> that code silently unless you've previous accepted it as "safe".
>
> This said, it might indeed be handy to be able to use , like you suggest
> (tho it too would need to go though some "security check", of course).
, as syntactic sugar here would be nice, but I'm thinking the added
complexity here wouldn't be worth it (since we already have the `eval'
method here).
So I'm closing this bug report.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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Lars Ingebrigtsen <=