GNU bug report logs - #51579
Mark variable as safe only in one file or directory

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: bug-gnu-emacs <at> gnu.org
Subject: Mark variable as safe only in one file or directory
Date: Tue, 2 Nov 2021 21:10:03 -0700

Severity: wishlist

I'd like a way to mark a variable as safe only when read from a
particular directory or file.

I create a .dir-locals.el file with some unsafe variable, e.g.

tmp=`mktemp -d`
echo "((nil . ((epa-file-cache-passphrase-for-symmetric-encryption . t))))" \
    > $tmp/.dir-locals.el
echo $tmp

Now I visit a file in the created directory and get this message:

     The local variables list in /tmp/tmp.qakuGgnFPH/
     contains values that may not be safe (*).

     Do you want to apply it?  You can type
     y  -- to apply the local variables list.
     n  -- to ignore the local variables list.
     !  -- to apply the local variables list, and permanently mark these
           values (*) as safe (in the future, they will be set automatically.)
     i  -- to ignore the local variables list, and permanently mark these
           values (*) as ignored

       * epa-file-cache-passphrase-for-symmetric-encryption : t

According to (info "(emacs) Safe File Variables"), hitting "i" means
that:

       You can also tell Emacs to permanently ignore all the variable/value
    pairs in the file, by typing ‘i’ at the confirmation prompt – these
    pairs will thereafter be ignored in this file and in all other files.

I would like to be able to mark this variable/value pair as safe *only*
when read from this file, and not in any file.

Message #8 received at 51579 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: 51579 <at> debbugs.gnu.org
Subject: Re: bug#51579: Mark variable as safe only in one file or directory
Date: Thu, 04 Nov 2021 19:10:16 +0100

Stefan Kangas <stefan <at> marxist.se> writes:

> I would like to be able to mark this variable/value pair as safe *only*
> when read from this file, and not in any file.

Yes, that sounds like a good idea to me.

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

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